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WO2022172911A1 - Chuck device and electric tool - Google Patents

Chuck device and electric tool Download PDF

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Publication number
WO2022172911A1
WO2022172911A1 PCT/JP2022/004879 JP2022004879W WO2022172911A1 WO 2022172911 A1 WO2022172911 A1 WO 2022172911A1 JP 2022004879 W JP2022004879 W JP 2022004879W WO 2022172911 A1 WO2022172911 A1 WO 2022172911A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
groove
chuck
rotation
nut ring
Prior art date
Application number
PCT/JP2022/004879
Other languages
French (fr)
Japanese (ja)
Inventor
大治郎 中村
Original Assignee
株式会社 ムラテクノロジー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2021112890A external-priority patent/JP2022122236A/en
Application filed by 株式会社 ムラテクノロジー filed Critical 株式会社 ムラテクノロジー
Publication of WO2022172911A1 publication Critical patent/WO2022172911A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16045—Jaws movement actuated by screws and nuts or oblique racks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to a chuck device and an electric power tool, for example, in an electric power tool such as an impact driver or a vibration drill, in which a base shaft of a rotary jig such as a driver jig or a drill jig is inserted and tightened to fix it.
  • an electric power tool such as an impact driver or a vibration drill
  • a base shaft of a rotary jig such as a driver jig or a drill jig is inserted and tightened to fix it.
  • This chuck device includes a locking ring that is axially constrained with respect to the chuck body, and a retaining ring that is axially movable with respect to the ratchet body.
  • a ratchet gear that meshes in the direction of loosening is formed on each of the opposing surfaces of the locking ring and the retaining ring.
  • the rotation input body may be affected by the resonance and inertial force caused by the locking mechanism that locks the clamping state in which the base shaft of the rotating jig is fixed from three directions by the jaws. may rotate in the tightening release direction to unintentionally release the locked state, or the rotary input body may rotate further in the tightening direction, making it impossible to release the locked state.
  • an object of the present invention is to provide a chuck device and an electric tool that can achieve tightening without inadvertently releasing the locked state or preventing the locked state from being released.
  • the present invention is a chuck device to be attached to a drive device having a drive shaft rotatable on its axis, which is arranged on the axis and has a shaft hole on the tip end side for allowing insertion of a base shaft of a rotary jig.
  • a substantially cylindrical chuck body having a chuck body, which is connected to the shaft hole on the front end side and is inserted into an inclined hole opened to the side of the chuck body on the rear end side, and is attached to the chuck body; a plurality of chuck claws movably arranged on the chuck body; a rotation input member rotatably mounted on the chuck body for inputting a rotational force by a rotational operation; a nut ring for synchronously moving the plurality of chuck claws in the inclined hole in the inclined direction by screwing the chuck main body and the chuck claws; and transmitting the rotational force of the rotation input body to the nut ring.
  • tightening direction lock means for regulating rotation of and loosening direction lock means for regulating rotation in the loosening direction
  • Loosening direction lock release means for releasing the rotation restriction of the loosening direction lock means is provided, and the lock means includes a gear-shaped locking groove provided in the chuck body, and is attached to the nut ring.
  • the tightening direction unlocking means restricts the rotation of the tightening direction lock means by differentially rotating at least the rotational input body and the nut ring in the tightening direction.
  • the loosening direction lock release means releases the rotation restriction of the loosening direction lock means by differential rotation in the loosening direction of at least the rotation input body and the nut ring.
  • the present invention is an electric power tool comprising a driving device and a driving transmission means for transmitting driving rotation of the driving device on an axis, and wherein the above-mentioned chuck device is rotatably provided by the rotation transmission means. characterized by being
  • the drive device having the rotatable drive shaft can be a rotary power tool such as an impact driver, a vibrating drill, or an electric driver.
  • the rotating jig can be a rotating drill jig, a plus or minus driver jig, or the like.
  • the base shaft of the rotating jig is also called a tool shank, and the chuck claws are also called jaws.
  • the lock release means includes tightening direction lock release means for releasing rotation restriction of the tightening direction lock means and loosening direction lock release means for releasing rotation restriction of the loosening direction lock means.
  • the direction lock release means releases the rotation regulation of the tightening direction lock means by differential rotation of at least the rotation input body and the nut ring in the tightening direction, and the loosening direction lock release means operates at least the rotation input. Due to the differential rotation in the loosening direction between the body and the nut ring, the rotation restriction of the loosening direction lock means is released. Therefore, if the rotation input member and the nut ring are not differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released.
  • the above-described tightening direction lock release means releases the rotation restriction of the tightening direction lock means by differential rotation in the tightening direction of at least the rotation input body and the nut ring. Due to the differential rotation in the tightening direction with the nut ring, the tightening direction lock release means releases the rotation restriction of the tightening direction lock means, and the loosening direction lock release means releases the rotation restriction of the loosening direction lock means. Alternatively, only the tightening direction unlocking means may release the rotation restriction of the tightening direction lock means.
  • the above-described loosening direction lock release means releases the rotation restriction of the loosening direction lock means by differential rotation of at least the rotation input body and the nut ring in the loosening direction. Due to the differential rotation of the input body and the nut ring in the loosening direction, the loosening direction unlocking means releases the rotation restriction of the loosening direction locking means, and the tightening direction unlocking means rotates the tightening direction locking means.
  • the restriction may be released, or only the loosening direction lock release means may release the rotation restriction of the loosening direction lock means.
  • fixing means for fixing the rotation direction of the locking groove to the chuck body is provided, and the fixing means is a fixed gear groove whose rotation direction is fixed to the chuck body.
  • a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction; in a normal state, the fixed gear groove and the fixed gear tooth are in a disengaged state;
  • the fixed gear groove and the fixed gear teeth are meshed by the movement of the nut ring to the base end side by the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotary input body.
  • the fixed gear groove may be fixed with respect to the chuck body.
  • the present invention also provides a chuck device to be attached to a drive device having a drive shaft rotatable on the axis, wherein the shaft hole is arranged on the axis and allows insertion of a base shaft of a rotary jig on the tip end side.
  • a substantially cylindrical chuck body having a tip end connected to the shaft hole and a rear end side of the chuck body connected to an inclined hole opened to the side of the chuck body, and is inserted into the chuck body a plurality of chuck claws movably disposed with respect to the chuck body; a rotation input body that is rotatably mounted on the chuck body and receives a rotational force through a rotational operation; a nut ring for synchronously moving the plurality of chuck claws in the inclined hole in the inclined direction by being screwed to the chuck main body and the chuck claws; a rotation transmitting portion for transmitting rotation; locking means for restricting rotation of the nut ring with respect to the chuck body; and unlocking means for releasing the restriction on rotation of the nut ring by the locking means; There are tightening direction lock means for restricting rotation in the tightening direction, and loosening direction lock means for restricting rotation in the loosening direction.
  • the locking means comprises a gear-shaped locking groove provided in the chuck body, and the locking means attached to the nut ring.
  • fixing means for fixing the locking groove with respect to the chuck body in a rotational direction the fixing means having a locking claw that locks the locking groove in the rotational direction with respect to the chuck body; and a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction.
  • the tightening direction unlocking means releases the rotation restriction of the tightening direction lock means by differential rotation of at least the rotation input body and the nut ring in the tightening direction, thereby releasing the loosening direction lock.
  • the means is at least the difference in the direction of loosening between the rotation input body and the nut ring. It is characterized in that the rotation regulation of the loosening direction lock means is released by the dynamic rotation.
  • fixing means for fixing the rotation direction of the locking groove to the chuck body includes a fixed gear groove whose rotation direction is fixed to the chuck body; fixed gear teeth provided in the locking groove and meshing with the fixed gear groove in the axial direction, the chuck claws gripping the base shaft acting as a reaction force due to the rotational input of the rotary input body in the tightening direction; By the movement of the nut ring toward the base end side, the fixed gear groove and the fixed gear teeth are engaged with each other, and the fixed gear groove is fixed to the chuck body.
  • the tightening direction unlocking means releases rotation restriction of the tightening direction locking means by differential rotation in the tightening direction of at least the rotation input body and the nut ring, and the loosening direction unlocking means At least the differential rotation in the loosening direction between the rotation input member and the nut ring releases the rotation restriction of the loosening direction lock means. Therefore, as described above, unless the rotation input member and the nut ring are differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released.
  • the fixed gear groove is a belt-shaped ring body that is inclined with respect to the circumferential direction and the axial direction, and the fixed gear groove is inclined with respect to the circumferential direction and the axial direction.
  • the fixed gear teeth are in a non-meshing state, and the inclined fixed gear grooves are torsionally deformed by the movement of the nut ring toward the proximal end side, so that the fixed gear grooves and the fixed gear teeth are in a state of meshing.
  • the torsional deformation of the inclined fixed gear teeth that is, the gear grooves function as disc springs, to switch between engagement and disengagement between the fixed gear grooves and the fixed gear teeth.
  • a flat portion may be formed on the inner diameter side of the gear teeth of the fixed gear teeth.
  • a separation direction biasing means may be provided for biasing the fixed gear teeth and the fixed gear grooves in the axial direction to separate them.
  • the fixed gear groove and the fixed gear groove mesh with each other when the nut ring moves toward the base end side with the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotation input body.
  • the fixed gear teeth and the fixed gear grooves are separated from each other by the biasing force of the separation direction biasing means. Axially spaced apart. Therefore, it is possible to reliably release the fixation of the locking groove to the chuck body in the rotational direction.
  • the nut ring, the fixed gear groove, and the fixed gear tooth are arranged in this order from the distal end side in the axial direction toward the base point side, and the fixed gear tooth is disposed between the nut ring and the fixed gear groove.
  • the fixed gear tooth may be provided with a plurality of rolling elements, and the nut ring, the rolling elements, the fixed gear grooves and the fixed gear teeth may form a bearing.
  • the nut ring can be smoothly rotated with respect to the fixed gear groove fixed to the chuck body.
  • the rolling element may be configured by a spherical body or a cylindrical body made of steel or resin.
  • the unlocking means includes a guide groove provided in the rotary input body, and a portion attached to the nut ring and pressed against the guide groove to be guided by the guide groove.
  • a force portion may be provided, and the locking pawl may be guided together with the guided portion.
  • the guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth, and when the guided portion is guided by the deep groove portion, the locking When the pawl is engaged with the engaging groove to be in a locked state and the guided portion is guided to the shallow groove, the engagement of the engaging pawl with the engaging groove is released and the unlocked state is established. You can become
  • the differential rotation of the rotary input body and the nut ring causes at least the guided portion pressed against the guide groove provided in the rotary input body by the urging portion to become a deep groove portion with a deep groove depth.
  • the locking pawl is locked in the locking groove to be in a locked state, and when guided by the guided portion in the shallow groove portion with a shallow groove depth, the locking in the locking groove is achieved.
  • the latching of the pawl can be released to enter the unlocked state.
  • the guided portion has an arc shape that protrudes toward the guide groove, and the deep groove portion and the shallow groove portion are arranged with a predetermined interval in the circumferential direction, In a state in which the guided portion abuts between the deep groove portion and the shallow groove portion, the guided portion may be guided to either the deep groove portion or the shallow groove portion by the biasing force of the biasing portion. .
  • the guided portion is automatically moved from the deep groove portion to the shallow groove portion by the biasing force of the biasing portion. You can be guided to either
  • the guide groove is a first guide groove
  • the guided portion is a first guided portion
  • the urging portion is a first urging portion
  • the rotational input body is provided with a second guide groove.
  • a second guided portion guided by the second guide groove and a second biasing portion for pressing the second guided portion against the second guide groove are attached to the nut ring.
  • the rotational input body may be differentially rotated with respect to the nut ring as the second guided portion is guided by the two guide grooves.
  • the second guided portion is guided by the second guide groove, and the rotational input body moves relative to the nut ring regardless of the relative rotational positions of the nut ring and the rotational input body. Differential rotation can be performed to ensure a locked state.
  • the first guided portion is guided by the first guide groove.
  • the engaging pawl is engaged with the engaging groove to be locked, but depending on the relative rotational position between the nut ring and the rotary input body in the tightened state, the first guided portion may move to the first position.
  • the second guided portion is guided by the second guide groove, so that the rotation input body can be rotated. rotates differentially with respect to the nut ring to reliably prevent unnatural backlash.
  • the second guided groove attached to the nut ring is guided by the second guide groove provided in the rotary input body, thereby adjusting the relative rotational position of the rotary input body with respect to the nut ring.
  • the second guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth, and the second guided portion protrudes toward the guide groove.
  • the second guided portion in the shallow groove portion of the second guide groove is guided to the deep groove portion by the biasing force of the second biasing portion, and is guided to the second guide groove by the biasing force of the second biasing portion.
  • the rotational input body may be differentially rotated with respect to the nut ring as it is guided from the shallow groove portion to the deep groove portion.
  • the second guided portion formed in an arc shape is replaced with the second guided portion at the relative rotational position between the nut ring and the rotary input body where the first guided portion is not completely guided by the first guide groove.
  • Unnatural backlash can be reliably prevented by guiding the rotary input member from the shallow groove portion to the deep groove portion of the guide groove 2 and differentially rotating the rotary input body with respect to the nut ring.
  • the second biasing portion may be composed of a torsion spring.
  • the torsion spring is also called a torsion spring.
  • the compact second urging portion can exert a strong urging force. Therefore, the second guided portion can be urged with a strong urging force against the second guide groove, and the second guided portion can be reliably guided by the second guide groove.
  • the nut ring may be provided with a deformation space in which the second biasing portion formed by the torsion spring can be deformed.
  • the second biasing portion can be torsionally deformed to exert a strong biasing force. Therefore, the second guided portion can be urged with a strong urging force against the second guide groove, and the second guided portion can be reliably guided by the second guide groove.
  • a chuck device and an electric tool that can achieve tightening that prevents the locked state from being unintentionally released or that the locked state cannot be released.
  • FIG. 1 is a front view of a power tool equipped with a chuck device;
  • FIG. FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side;
  • FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side;
  • FIG. 2 is a longitudinal sectional view of the chuck device;
  • Explanatory drawing of a nut ring and a spring ring Explanatory drawing of a lock ring and an outer ring.
  • Explanatory drawing of a lock/release mechanism Explanatory drawing of the locking/unlocking mechanism in a bidirectionally locked state.
  • FIG. 11 is an exploded perspective view of each component of a chuck device of another embodiment from the base end side;
  • FIG. 11 is an exploded perspective view of each component of a chuck device of another embodiment, viewed from the distal end side;
  • FIG. 11 is an explanatory diagram of a locking/unlocking mechanism in a bidirectionally locked state of a chuck device according to still another embodiment
  • FIG. 4 is an explanatory diagram of a locking/unlocking mechanism in a tightened state of a chuck device according to still another embodiment
  • FIG. 11 is an explanatory diagram of a lock/release mechanism in an open state of a chuck device according to still another embodiment
  • 1 is a front view of a power tool equipped with a chuck device
  • FIG. FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side
  • FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side;
  • FIG. 2 is a longitudinal sectional view of the chuck device; Explanatory drawing of a nut ring and a spring ring. Explanatory drawing of the nut ring and spring ring of an assembly
  • FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side;
  • FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side;
  • FIG. 1 shows a front view of an electric power tool K equipped with a chuck device 1
  • FIG. 2 shows an exploded perspective view of each component of the chuck device 1 from the base end side B
  • FIG. 3 shows each component of the chuck device 1.
  • An exploded perspective view from the tip end side F of the element is shown
  • FIG. 4 shows a longitudinal sectional view of the chuck device 1.
  • FIG. 5 shows an explanatory diagram of the inner sleeve 23
  • FIG. 6 shows an explanatory diagram of the nut ring 22 and the spring ring 34
  • FIG. 7 shows an explanatory diagram of the lock ring 32 and the outer ring 31
  • FIG. is an explanatory diagram of.
  • FIG. 5(a) shows a perspective view of the inner sleeve 23 from the base end side B
  • FIG. 5(b) shows a rear view of the inner sleeve 23.
  • FIG. 5A a portion of the base end side B of the inner sleeve 23 is shown in a see-through state.
  • 6(a) shows a perspective view of the nut ring 22 and the spring ring 34 from the tip side F
  • FIG. 6(b) shows a front view of the nut ring 22
  • FIG. 6(c) shows a front view of the spring ring 34.
  • Figure shows.
  • FIG. 7(a) shows a perspective view of the lock ring 32 and the outer ring 31 from the base end side B
  • FIG. 7(b) shows a perspective view of the lock ring 32 and the outer ring 31 from the distal end side F
  • FIG. 7(c) shows a front view of the outer ring 31
  • FIG. 7(d) shows a rear view of the lock ring 32.
  • FIG. 8(a) shows a sectional view of the lock bearing 30 in the non-engaged state
  • FIG. 8(b) shows a sectional view of the lock bearing 30 in the engaged state.
  • FIG. 9 shows an explanatory diagram of the locking/unlocking mechanism 20
  • FIGS. 10 to 12 show explanatory diagrams of the locking/unlocking mechanism 20 in a two-way locked state
  • FIG. 14 shows an explanatory view of the lock/release mechanism 20 in the unlocked state.
  • FIGS. 9(a) and (b) show partial cross-sectional perspective views of the lock/release mechanism 20 from the distal end side F
  • FIG. 9(b) shows the inner sleeve of the lock/release mechanism 20. Only 23 is a cross-sectional perspective view, and the others are perspective views.
  • FIG. 10(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 10(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line AA in FIG. 10(a).
  • FIG. 11(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 11(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line BB in FIG. 11(a).
  • FIG. 12(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 12(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line CC in FIG. 12(a). .
  • FIG. 13(a) shows a cross-sectional view of the locking/unlocking mechanism 20 in the tightened state taken along line BB in FIG. 11(a), and FIG.
  • FIG. 13(c) shows a cross-sectional view of the locking/unlocking mechanism 20 in the tightened state, taken along line CC in FIG. 12(a).
  • FIG. 14(a) shows a cross-sectional view of the locking/unlocking mechanism 20 in the unlocked state taken along line BB in FIG. 11(a)
  • FIG. 14(b) shows the locking/unlocking mechanism 20 in the unlocked state shown in FIG. 14(a) is a sectional view taken along the line AA
  • FIG. 14(c) is a sectional view taken along the line CC of FIG. 12(a) of the locking/unlocking mechanism 20 in the unlocked state.
  • the chuck device 1 of the present invention is installed at the tip of the power tool K.
  • this power tool K has a housing 2 with a handle portion 2a that a user grips when using, and a spindle 4 provided on the distal end side F of the housing 2. As shown in FIG.
  • the chuck device 1 is attached to the tip of the spindle 4, and the chuck device 1 clamps and fixes the base shaft 5a of the rotary jig 5.
  • the spindle 4 is configured to be rotated by the rotational driving force of a motor M installed inside the housing and capable of forward and reverse rotation by operating a trigger 6 arranged on the handle portion 2a.
  • the chuck device 1 installed in the electric power tool K described above is constructed by assembling a locking/unlocking mechanism 20 having a lock bearing 30 to a chuck mechanism 10 which is a main component. ing.
  • the chuck mechanism 10 is composed of a body 11 and jaws 12 .
  • the body 11 is composed of a rear body portion 111, a middle body portion 112, and a front body portion 113 from the base end side B, and is formed in a substantially cylindrical shape having an insertion hole 114 in the axial direction X at the center.
  • Insertion holes are provided at three locations in the circumferential direction of the body 11 in a direction intersecting the axial direction X from the outer peripheral side to the inner peripheral side through the middle body portion 112 having a flange portion and the front body portion 113 .
  • a jaw mounting hole 115 communicating with 114 is provided. It should be noted that the three jaw mounting holes 115 are formed such that the intersections of extension lines in the radially inner direction are on the axial direction X. As shown in FIG.
  • the jaw 12 is formed in a substantially columnar shape having a screw groove 121 on the outer surface of the base end side B to be screwed with a fitting screw groove 225 of the nut ring 22 to be described later. Further, the front inner side surface of the jaw 12 forms a pressing surface 122 that is substantially parallel to the axial direction X in a direction intersecting the axial direction of the substantially cylindrical shape. is equipped with a tip 123 made of carbide. The jaw 12 having such a configuration is arranged in such a posture that the pressing surface 122 is parallel to the axial direction X in three directions in the circumferential direction with respect to the axial direction X, as described above.
  • the chuck mechanism 10 is constructed by inserting the jaws 12 into the jaw mounting holes 115 of the body 11 constructed as described above. At this time, the jaw 12 is inserted into the jaw mounting hole 115 so that the screw groove 121 faces radially outward. 2 to 5 and 8, the lock bearing 30 includes an outer ring 31, a lock ring 32, balls 33, and a spring ring 34 in order from the base end side B in the axial direction X. As shown in FIGS.
  • the outer ring 31 has a central opening 311 at the center in a front view, through which the middle body portion 112 is inserted, and constitutes the rear surface of the lock bearing 30 on the proximal side B (the proximal side B in the axial direction X). and an outer peripheral side surface 313 protruding from the outer peripheral edge of the rear ring face 312 to the front end side F.
  • a corner formed by the rear ring surface 312 and the outer peripheral side surface 313 is formed with a curved surface corresponding to the ball 33 .
  • a ratchet gear 314 that meshes with a ratchet pawl 348 of a spring arm 346 of a spring ring 34 (to be described later) is arranged on the tip side F of the inner peripheral surface of the outer peripheral side surface 313 in the circumferential direction.
  • the ratchet gear 314 to which the ratchet pawl 348 engages is, as shown in the enlarged view of part a in FIG. ) and loosening direction (counterclockwise direction when viewed from the distal end side F, hereinafter referred to as counterclockwise direction L). Furthermore, the front end side F of the rear ring surface 312 has a meshing groove 315 that meshes in the axial direction X with a meshing gear 324 of the lock ring 32 to be described later.
  • the lock ring 32 is composed of a ring body 322 having a central opening 321 through which the middle body portion 112 is inserted in the center in a front view.
  • a rotation fixing tab 323 projecting in a semicircular shape when viewed from the front is provided.
  • the rotation fixing tab 323 is attached to the middle body portion 112 of the body 11 , the rotation fixing tab 323 is fitted into a fixing concave portion 112 a formed in the front end side F of the flange portion of the middle body portion 112 of the body 11 , and attached to the body 11 .
  • they In order to rotate and fix them, they are arranged at three locations at equal intervals in the circumferential direction.
  • a meshing gear 324 that meshes with the meshing groove 315 of the rear ring surface 312 of the outer ring 31 is provided on the surface of the base end side B of the ring body 322 .
  • the ring body 322 has a substantially rectangular cross section that is longer in the radial direction than the distal end side F, but as shown in FIG. .
  • the lock ring 32 is inclined about 7 degrees toward the front end side F with respect to the direction perpendicular to the axial direction X. As shown in FIG.
  • the cross section of the lock ring 32 in which the radially outer side becomes the distal side F from the radially inner side due to the pressing force toward the proximal end side B, is perpendicular to the axial direction X as shown in FIG. 8(b). It forms a disc spring that is flat in the direction and generates an urging force toward the tip side F.
  • the balls 33 are spherical bodies made of steel, and a plurality of balls 33 are arranged in the circumferential direction with the axial direction X as the center.
  • the ball 33 may be made of resin instead of a steel ball as long as it satisfies required properties such as predetermined strength and wear resistance. good too.
  • the spring ring 34 has a central opening 341 at the center in a front view, through which the middle body portion 112 can be inserted, and has a front ring surface 342 and an inner peripheral edge of the front ring surface 342 that curves inward and extends toward the proximal end. and an inner peripheral surface 343 protruding to the side B.
  • front ring surface 342 is provided with three front protrusions 344 protruding from the outer peripheral edge toward the front end side F at equal intervals in the circumferential direction.
  • the inner peripheral surface 343 that curves inward and protrudes toward the base end side B is configured with a curved surface corresponding to the ball 33 described later.
  • the forward protruding portion 344 is to be fitted with a nut ring 22, which will be described later, and mesh with a ratchet gear 314 to form a ratchet mechanism, and protrudes from the outer peripheral edge of the front ring surface 342 toward the distal end side F. and a spring arm 346 extending from the connecting piece 345 to both sides in the circumferential direction.
  • a semi-circular tab 347 that fits into a guide groove 232 of the inner sleeve 23 (to be described later) and a ratchet pawl 348 that engages with the ratchet gear 314 of the outer ring 31 are provided at the distal end of the spring arm 346 in the circumferential direction.
  • the semicircular tab 347 is formed by bending the tip of the spring arm 346 in the plate thickness direction and forming a substantially semicircular shape with a convex radially outer side when viewed from the tip side F.
  • the ratchet pawl 348 is arranged near the base of the connecting piece 345 of the semicircular tab 347 , and the semicircular tab 347 is arranged on the tip side F of the ratchet pawl 348 . As such, the ratchet pawl 348 is positioned between the semi-circular tab 347 and the forward ring surface 342 .
  • the spring arms 346 having the semicircular tabs 347 and the ratchet pawls 348 at their ends are provided on both sides of the connecting piece 345 in the circumferential direction. 346R, and the counterclockwise direction L is the L side spring arm 346L.
  • the semi-circular tab 347 of the R-side spring arm 346R is the R-side semi-circular tab 347R
  • the ratchet pawl 348 is the R-side ratchet pawl 348R
  • the semicircular tab 347 of the L-side spring arm 346L is an L-side semicircular tab 347L
  • the ratchet pawl 348 is an L-side ratchet pawl 348L.
  • the outer ring 31 , the lock ring 32 , the balls 33 and the spring ring 34 configured as described above are assembled to form the lock bearing 30 .
  • the meshing groove 315 formed on the front end side F surface of the rear ring surface 312 of the outer ring 31 and the meshing gear 324 formed on the base end side B surface of the ring main body 322 of the lock ring 32 face each other.
  • the lock ring 32 is arranged radially inward of the outer peripheral side surface 313 so as to do so.
  • a plurality of balls 33 are arranged on the tip side F of the lock ring 32, and the spring ring 34 is assembled from the tip side F thereof.
  • the spring ring 34 is arranged so that the inner peripheral surface 343 straddles the radially inner side and the tip side F of the plurality of balls 33 arranged on the tip side F of the lock ring 32 .
  • the lock bearing 30 is assembled so that the ratchet pawl 348 provided at the tip of the spring arm 346 of the connecting piece 345 engages with the ratchet gear 314 formed on the inner surface of the outer peripheral side surface 313 of the outer ring 31. complete.
  • the L-side ratchet pawl 348L does not engage with the ratchet gear 314, but when the R-side ratchet pawl 348R engages with the ratchet gear 314, the spring ring 34 rotates in the clockwise direction R with respect to the outer ring 31. can rotate smoothly in the counterclockwise direction L.
  • the lock/release mechanism 20 is composed of a back sleeve 21, a nut ring 22, an inner sleeve 23, an outer sleeve 24, a nose piece 25, and the lock bearing 30 described above. 2 to 4, the lock/release mechanism 20 includes the lock bearing 30 described above, a back sleeve 21 shown on the base end side B in the axial direction X from the lock bearing 30, and a back sleeve 21 from the lock bearing 30. It is composed of a nut ring 22, an inner sleeve 23, an outer sleeve 24, and a nose piece 25 shown in the figure on the distal end side F in the axial direction X. As shown in FIG.
  • the back sleeve 21 constitutes the back surface of the chuck device 1 and includes a ring body 212 having a circular opening 211 for allowing the insertion of the rear body portion 111 of the body 11 and an inner peripheral edge of the ring body 212 forming the circular opening 211. It is composed of an inner cylindrical portion 213 protruding to the tip side F in the axial direction X and an outer cylindrical portion 214 protruding to the tip side F in the axial direction X at the outer peripheral edge of the ring body 212 .
  • the inner cylindrical portion 213 is formed with an inner diameter that allows it to be press-fitted into the rear body portion 111 of the body 11 , and is formed with a height about twice that of the outer cylindrical portion 214 .
  • the end of the outer cylindrical portion 214 which is formed to be about half the height of the inner cylindrical portion 213, has a diameter-reduced end portion 214a whose diameter is reduced in a stepped manner on the outer diameter side.
  • the nut ring 22 is composed of a ring-shaped ring body 222 having a truncated cone-shaped opening 221 whose diameter is reduced toward the distal end side F when viewed in cross section.
  • three differential recesses 223 are formed at predetermined intervals in the circumferential direction so that differential protrusions 231 of the inner sleeve 23, which will be described later, can be loosely fitted in the circumferential direction.
  • Three connection recesses 224 are formed on the outer peripheral surface of the ring main body 222 at positions corresponding to the front projections 344 to allow the connection pieces 345 of the front projections 344 of the spring ring 34 to be fitted.
  • a helical fitting screw groove 225 with which the screw groove 121 of the jaw 12 meshes is formed.
  • the fitting thread groove 225 is formed at a spiral angle corresponding to the thread groove 121 of the jaw 12 described above, and is formed with a spiral length corresponding to a plurality of turns.
  • the nut ring 22 configured as described above is assembled with the lock bearing 30 described above, as shown in FIG. 6(a). Specifically, the connecting piece 345 of the forward protruding portion 344 of the spring ring 34 assembled to the lock bearing 30 is inserted into the connecting recess 224 of the nut ring 22 arranged on the tip end side F so that the spring ring 34 and the nut ring 22 are connected. and are connected. The nut ring 22 assembled with the lock bearing 30 in this manner is rotationally fixed with the spring ring 34 .
  • the inner sleeve 23 has a substantially bell-shaped tubular shape in a side view that is slightly smaller than the outer sleeve 24 and is fitted into the outer sleeve 24 to be described later from the base end side B in the axial direction X to be contained therein. As shown in FIG. 5, the inner sleeve 23 protrudes from the center in the axial direction X to the inner peripheral side of the distal end side F toward the proximal end side B, and has a gap formed on the surface of the nut ring 22 on the distal end side F. Differential protrusions 231 that are loosely fitted in the dynamic recesses 223 are formed at three locations in the circumferential direction at predetermined intervals.
  • guide grooves 232 (232R, 232L) for locking the semicircular tabs 347 of the forward projecting portion 344 are provided on the inner peripheral surface on the base end side B from the differential convex portion 231 .
  • the guide groove 232 includes an R-side guide groove 232R arranged in the clockwise direction R in which the R-side semicircular tab 347R of the R-side spring arm 346R is fitted and guided.
  • An L-side guide groove 232L arranged in the counterclockwise direction L is provided to guide the L-side semicircular tab 347L of the side spring arm 346L.
  • the R-side guide groove 232R in the clockwise direction R that guides the R-side semicircular tab 347R is arranged in the counterclockwise direction L of the R-side guide groove 232R, and the locked R-side semicircular tab 347R is positioned radially outward.
  • a shallow groove portion 232Rb arranged in the clockwise direction R in the R-side guide groove 232R and to which the R-side semicircular tab 347R to be locked is biased radially inward;
  • the R-side guide groove 232R is formed in a groove shape in which the deep groove portion 232Ra, the shallow groove portion 232Rb, the chamfered groove portion 232Rc, and the convex groove portion 232Rd are continuously integrated in a substantially flat shape.
  • the L-side guide groove 232L in the counterclockwise direction L that guides the L-side semicircular tab 347L is arranged in the clockwise direction R in the L-side guide groove 232L, and the locked L-side semicircular tab 347L extends radially inward.
  • the biased shallow groove portion 232Lb and the deep groove portion 232La arranged in the counterclockwise direction L in the L-side guide groove 232L and having the L-side semicircular tab 347L to be locked on the radially outer side are continuous in a substantially hump shape. It is formed in a groove shape that is integrated with each other.
  • the shallow groove portions 232Rb and 232Lb and the chamfered groove portion 232Rc to which the locked semicircular tab 347 is urged radially inwardly are urged radially inwardly in the assembled state.
  • the semicircular tab 347 and the ratchet pawl 348 arranged side by side are spaced radially inward from the ratchet gear 314 of the outer ring 31, and are formed to a depth that moves to a position where the engagement with the ratchet gear 314 is released. .
  • the circumferential distance between the deep groove portion 232La and the shallow groove portion 232Lb and the circumferential distance between the shallow groove portion 232Rb and the chamfered groove portion 232Rc are the same as the differential concave portion 223 of the nut ring 22 and the differential convex portion of the inner sleeve 23. 231 is loosely fitted, that is, the rotation amount of the inner sleeve 23 differentially rotated in the circumferential direction with respect to the nut ring 22 .
  • the circumferential distance between the chamfered groove portion 232Rc and the deep groove portion 232La and the circumferential distance between the shallow groove portion 232Rb and the shallow groove portion 232Lb are determined by the R-side semicircular tab in the clockwise direction R provided in the front projection portion 344. 347R and the R-side semicircular tab 347R in the counterclockwise L direction.
  • the L-side semicircular tab 347L in the counterclockwise direction L is the deep groove of the L-side guide groove 232L. It is guided between the portion 232La and the shallow groove portion 232Lb.
  • the outer sleeve 24 is slightly larger than the inner sleeve 23 and allows the inner sleeve 23 to be fitted therein from the base end side B in the axial direction X. It has the same diameter and is formed in a substantially bell-shaped tubular shape in a side view with a narrowed tip end having a tip opening 241 for inserting a nosepiece 25 (described later) on the tip end side.
  • the inner sleeve 23 inserted into the outer sleeve 24 will be referred to as sleeves 23 and 24 .
  • the inner sleeve 23 and the outer sleeve 24 may be assembled separately as described above, but may be integrally formed.
  • the nosepiece 25 has an insertion hole 251 at the center in front view for allowing the jaws 12 to pass therethrough. It is composed of an insertion part 252 protruding to the side B.
  • the insertion portion 252 has a hollow, substantially cylindrical shape that is inserted into the tip opening 241 of the outer sleeve 24 described above.
  • the back sleeve 21 is attached to the body 11 from the base end side B in the axial direction X by first inserting the rear body portion 111 of the body 11 into the circular opening 211. do.
  • the inner cylindrical portion 213 having the inner surface formed to have substantially the same diameter as the outer surface of the rear body portion 111 is press-fitted into the rear body portion 111, the back sleeve 21 is rotated in the axial direction X and with respect to the body 11. It is mounted in a fixed state in both directions.
  • the lock bearing 30 with the nut ring 22 assembled is mounted from the front end side F of the body 11 where the jaw 12 is inserted into the jaw mounting hole 115, and the screw grooves 121 of all the jaws 12 and the lock bearing 30 are mounted as described above.
  • the lock bearing 30 is attached to the body 11 while screwing it into the fitting screw groove 225 of the nut ring 22 .
  • the rotation fixing tabs 323 of the lock ring 32 constituting the lock bearing 30 are engaged with the fixing recesses 112a formed in the middle body portion 112, so that the lock ring 32 is rotationally fixed with respect to the body 11. .
  • outer sleeve 24 integrated by press-fitting the inner sleeve 23 inside is inserted from the front end side F of the body 11 on which the lock bearing 30 with the nut ring 22 assembled as described above is mounted.
  • the semicircular tab 347 of the spring ring 34 of the lock bearing 30 is engaged with the guide groove 232 of the inner sleeve 23, and the differential projection 231 of the inner sleeve 23 is loosely fitted into the differential recess 223 of the nut ring 22. Insert as shown. Furthermore, the ratchet gear 314 of the outer ring 31 and the ratchet pawl 348 of the spring ring 34 may be engaged.
  • the insertion portion 252 of the nosepiece 25 is inserted through the tip opening 241 of the outer sleeve 24 to complete the assembly of the chuck device 1 .
  • the nosepiece 25 is attached to the body 11 while being fixed in the axial direction X and the rotational direction.
  • the base shaft 5a of the rotary jig 5 is inserted into the insertion hole 114 of the body 11 from the distal end side F, and the sleeves 23 and 24 are rotated in the clockwise direction R. .
  • the nut ring 22 rotates clockwise because the semicircular tab 347 is engaged with the guide groove 232 by the biasing force of the spring arm 346 .
  • the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 can be gripped and fixed from three directions in the circumferential direction.
  • the locking/unlocking mechanism 20 is in the two-way locked state shown in FIGS. 10 to 12 or in the unlocked state shown in FIG. 14 depending on the state of previous use. 10 and 12, the locking/unlocking mechanism 20 in the two-way locked state is such that the R-side semicircular tab 347R engaged with the R-side guide groove 232R is located in the deep groove portion 232Ra and the L-side guide The L-side semicircular tab 347L that engages with the groove 232L is located in the deep groove portion 232La.
  • the R-side semi-circular tab 347R When the R-side semi-circular tab 347R is positioned in the deep groove portion 232Ra (enlarged view of part a in FIG. 10), the R-side semi-circular tab 347R and the R-side ratchet pawl 348R arranged in parallel with each other are aligned with the ratchet gear 314 of the outer ring 31. (enlarged view of part a in FIG. 12).
  • the outer ring 31 and the sleeves 23, 24 can rotate in the clockwise direction R with respect to the spring ring 34 and the nut ring 22 while generating a ratchet sound, but they rotate in the counterclockwise direction. Rotation of L is restricted.
  • the L-side semicircular tab 347L when the L-side semicircular tab 347L is positioned in the deep groove portion 232La (enlarged view of the b portion in FIG. 10), the L-side semicircular tab 347L and the L-side ratchet pawl 348L arranged in parallel with each other engages the ratchet gear 314 of the outer ring 31. (enlarged view of b in FIG. 12).
  • the differential protrusion 231 is not in contact with the end surface 222a.
  • the meshing gear 324 of the lock ring 32 and the ratchet gear 314 of the outer ring 31 do not mesh as shown in the enlarged view of part a in FIG. 8(a). That is, since the lock ring 32 fixed to rotate with respect to the body 11 and the outer ring 31 do not mesh with each other, the rotation of the outer ring 31 with respect to the body 11 is not restricted.
  • the sleeves 23 and 24 in the clockwise direction R By rotating the sleeves 23 and 24 in the clockwise direction R, the three jaws 12 are synchronously advanced in the jaw mounting hole 115 in the inclined direction, and the base axis of the rotary jig 5 inserted into the insertion hole 114 is moved. 5a can be held and fixed from three directions in the circumferential direction.
  • lock/unlock mechanism 20 in the unlocked state shown in FIG. 14 has an R-side semicircular tab 347R that is locked in the R-side guide groove 232R.
  • the L-side semicircular tab 347L is also located in the shallow groove portion 232Lb.
  • both the ratchet pawls 348 are separated from the ratchet gear 314 and meshing is canceled.
  • the spring ring 34 and the nut ring 22 can rotate both in the counterclockwise direction L and in the clockwise direction R with respect to the outer ring 31 and sleeves 23 and 24 . That is, the outer ring 31, the sleeves 23, 24, the spring ring 34, and the nut ring 22 are relatively rotatable. This state is the unlocked state shown in FIG.
  • the jaw 12 gripping the base shaft 5a is used as a reaction force to move the nut ring 22 screwed into the thread groove 121 of the jaw 12 toward the base end side B. force acts.
  • the sleeves 23 and 24 move clockwise with respect to the outer ring 31.
  • the chamfered groove portion relatively rotates in the rotational direction R, and as shown in the enlarged view of part a in FIG. 232Rc, and as shown in the enlarged view of the b portion of FIG. 13(b), the L-side semicircular tab 347L is positioned in the shallow groove portion 232Lb.
  • the R-side semi-circular tab 347R When the R-side semi-circular tab 347R is located in the chamfered groove portion 232Rc (enlarged view of part a in FIG. 13B), the R-side semi-circular tab 347R and the R-side ratchet pawl 348R arranged side by side are aligned with the ratchet of the outer ring 31. The engagement is released by separating from the gear 314 (enlarged view of d in FIG. 13(c)). When the R-side ratchet pawl 348R is separated from the ratchet gear 314 and the engagement is released, the spring ring 34 and the nut ring 22 move in the clockwise direction R and the counterclockwise direction L with respect to the outer ring 31 and the sleeves 23 and 24. can also be rotated.
  • both the semicircular tabs 347 are engaged with the guide grooves 232 with the biasing forces of both spring arms 346 acting, so that the bidirectionally locked state can be reliably maintained. can. Therefore, it is possible to prevent the locking/unlocking mechanism 20 from being inadvertently released from the two-way locked state.
  • the force on the base end side B acting on the nut ring 22 as a reaction force of the jaw 12 gripping the base shaft 5a is reduced.
  • the force on the proximal side B acting on the nut ring 22 is reduced, the pressing force on the proximal side B acting on the lock ring 32 via the balls 33 is also reduced, and the lock ring 32 functions as a disk spring. Due to the biasing force, the initial cross-sectional inclination state is obtained.
  • the outer ring 31, the spring ring 34, the nut ring 22, and the sleeves 23 and 24 are rotatable with respect to the body 11.
  • the jaws 12 can grip the base shaft 5a. can be resolved.
  • the chuck device 1 attached to a driving device having a drive shaft rotatable in the axial direction X is arranged in the axial direction X, and the base shaft 5a of the rotating jig 5 is inserted into the distal end side F. and a jaw mounting hole 115 that communicates with the insertion hole 114 on the distal side F of the body 11 and opens to the side of the body 11 on the proximal side B of the body 11.
  • the ratchet gear 314 and ratchet pawl 348 of the chuck device 1 are composed of a ratchet gear 314 and an L-side ratchet pawl 348L that restrict rotation in the counterclockwise direction L, and a ratchet gear 314 and an R-side ratchet that restrict rotation in the clockwise direction R. There is a claw 348R.
  • the guide groove 232 and the semicircular tab 347 of the chuck device 1 are composed of an L-side guide groove 232L and an L-side semicircular tab 347L that release the rotation restriction of the ratchet gear 314 and the L-side ratchet pawl 348L, the ratchet gear 314 and the R-side ratchet.
  • the L-side guide groove 232L and the L-side semicircular tab 347L of the chuck device 1 are driven by the differential rotation of at least the sleeves 23, 24 and the nut ring 22 in the counterclockwise direction L to rotate the ratchet gear 314 and the L-side ratchet pawl 348L. Release the rotation restriction.
  • the L-side guide groove 232L and the L-side semicircular tab 347L of the chuck device 1 at least rotate the ratchet gear 314 and the R-side ratchet pawl 348R by the differential rotation of the sleeves 23, 24 and the nut ring 22 in the clockwise direction R. Release the rotation restriction. Therefore, it is possible to achieve tightening that prevents the locked state from being unintentionally released or the locked state from which it becomes impossible to release.
  • a guide groove 232 having a gear-shaped ratchet gear 314 provided on the body 11, and a ratchet pawl 348 attached to the nut ring 22 and engaging the ratchet gear 314, and a semicircular tab 347 form the ratchet gear.
  • an outer ring 31 and a lock ring 32 are provided to fix the rotation direction of the ratchet gear 314 with respect to the body 11, and the outer ring 31 and the lock ring 32 are meshing gears whose rotation direction is fixed with respect to the body 11.
  • 324 and an engagement groove 315 provided in the ratchet gear 314 and engaged with the engagement gear 324 in the axial direction X, and gripping the base shaft 5a by rotational input of the sleeves 23, 24 in the counterclockwise direction L.
  • the sleeves 23, 24 and the nut ring 22 are not differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released. Furthermore, when the base shaft 5a of the rotating jig 5 inserted into the insertion hole 114 and gripped by the plurality of jaws 12 is accidentally pulled out in a locked state, even if a so-called self-locking state occurs, the meshing gear 324 is engaged. Since the groove 315 is not engaged with the groove 315, it is possible to solve the problem that the locked state cannot be released.
  • the meshing gear 324 is a belt-shaped ring body that is inclined with respect to the circumferential direction and the axial direction X. As the nut ring 22 moves to the base end side, the inclined meshing gear 324 is torsionally deformed, and the meshing gear 324 and the meshing groove 315 are brought into a meshing state.
  • the nut ring 22, the meshing gear 324, and the meshing groove 315 are arranged in this order from the distal end side F toward B in the axial direction X, and a plurality of balls 33 are provided between the nut ring 22 and the meshing gear 324.
  • a lock bearing 30 is constructed by Therefore, the nut ring 22 can be smoothly rotated with respect to the meshing gear 324 fixed to the body 11 .
  • the guide groove 232 has deep groove portions 232Ra and 232La with deep groove depths and shallow groove portions 232Rb and 232Lb with shallow groove depths. Then, when the semicircular tab 347 is guided to the deep grooves 232Ra and 232La, the ratchet pawl 348 engages with the ratchet gear 314 to enter a locked state.
  • the ratchet pawl 348 engages with the ratchet gear 314 to be locked, and when guided by the semicircular tab 347 in the shallow grooves 232Rb, 232Lb, the ratchet gear 314 The latching of the ratchet pawl 348 can be released to enter the unlocked state.
  • the semicircular tab 347 has an arcuate shape that protrudes toward the guide groove 232, and a deep groove portion 232Ra and a shallow groove portion 232Rb are arranged with a predetermined interval in the circumferential direction.
  • the biasing force of the spring arm 346 automatically guides the semicircular tab 347 to either the deep groove portion 232Ra or the shallow groove portion 232Rb. .
  • the sleeves 23 and 24 are rotated in the clockwise direction R, and the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 is synchronized with the three jaws 12 by the nut ring 22. , the sleeves 23 and 24 are further rotated in the clockwise direction R, and force directed toward the proximal side B is applied to the lock ring 32 using the jaw 12 that grips the base shaft 5a as a reaction force.
  • the lock ring 32 is flattened in the direction orthogonal to the axial direction X, and the meshing gear 324 formed on the surface of the base end side B of the ring main body 322 and the rear ring surface 312 of the outer ring 31 are engaged with each other.
  • the outer ring 31 is rotatably fixed to the body 11 by meshing in the axial direction X with the meshing groove 315 formed on the surface of the distal end side F of the outer ring 31 .
  • the outer ring 31 is rotatable with respect to the body 11 when the jaws 12 are not gripping the base shaft 5a.
  • the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 are meshed to restrict the rotation of the outer ring 31 with respect to the body 11. may be configured.
  • a chuck device 1X does not include a lock ring 32 but includes an outer ring 31X.
  • the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
  • the outer ring 31X has the functions of the outer ring 31 and the lock ring 32 of the chuck device 1 described above.
  • the outer ring 31X is a ring body having a central opening 311, has a rear ring surface 312 and an outer peripheral side surface 313, and has a ratchet gear 314 on the inner surface of the central opening 311.
  • the inner peripheral edge of the rear ring face 312 is also provided with rotation locking tabs 316 corresponding to the rotation locking tabs 323 of the lock ring 32 described above.
  • the chuck device 1X is in a state where the rotation of the outer ring 31X with respect to the body 11 is always restricted. For this reason, the chuck device 1X, like the chuck device 1 described above, uses the jaws 12 gripping the base shaft 5a as a reaction force to apply a force in the direction toward the base end side B to the lock ring 32, so that the ring body 322
  • the meshing gear 324 formed on the base end side B surface of the outer ring 31 and the meshing groove 315 formed on the front end side F surface of the rear ring surface 312 of the outer ring 31 are meshed in the axial direction X, so that the outer ring 31 Although it does not have the function of rotating and fixing to the body 11, other effects of the chuck device 1 can be achieved in the same manner.
  • a chuck device 1Y of still another embodiment will be described with reference to FIGS. 17 to 20.
  • the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
  • the shape of the guide groove 232 in the chuck device 1 is simplified. Specifically, in the chuck device 1 described above, the R-side guide groove 232R in which the R-side semicircular tab 347R is engaged and guided is formed in a substantially hump shape, and the L-side semicircular tab 347L is engaged.
  • the L-side guide groove 232L to be guided is formed in a substantially hump shape, that is, the R-side guide groove 232R and the L-side semicircular tab 347L in which the R-side semicircular tab 347R in the clockwise R direction is engaged in the forward projecting portion 344 are formed.
  • the L-side guide groove 232L to be locked is formed with a different groove shape.
  • the chuck device 1Y has a guide groove 232Y formed in a simple concave shape, and has an R-side guide groove 232YR in the clockwise direction R and an R-side guide groove 232YR in the counterclockwise direction.
  • the L side guide groove 232YL of L is formed in the same groove shape.
  • the guide groove 232Y itself is also formed in the same symmetrical shape in the clockwise direction R and the counterclockwise direction L. As shown in FIG.
  • the locking/unlocking mechanism 20Y of the chuck device 1Y thus formed can disengage the ratchet pawl 348 from the ratchet gear 314 by slightly rotating the outer sleeve 24 relative to the nut ring 22.
  • the chuck device 1Y configured in this manner can achieve the same effects as the chuck device 1 described above. Further, in the chuck device 1Y, since the guide groove 232Y itself has a circumferential length shorter than that of the guide groove 232 of the chuck device 1, the amount of loose fitting between the differential convex portion 231 and the differential concave portion 223 can be reduced. Switching between the locked state and the unlocked state of the release mechanism 20Y can be realized with a small amount of differential between the sleeves 23 and 24 and the nut ring 22 and spring ring 34 .
  • the lock ring 32 is arranged on the distal end side F of the outer ring 31, and the force on the proximal end side B is locked via the ball 33 using the jaw 12 that grips the base shaft 5a as a reaction force.
  • the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 were meshed in the axial direction X, but as shown in FIG. A ring 32Z may be arranged.
  • the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
  • an engaging groove 315Z is formed on the base end side B of the rear ring surface 312Z of the outer ring 31Z to which the spring ring 34 and the balls 33 are assembled.
  • a lock bearing 30Z to which the outer ring 31Z, the spring ring 34 and the balls 33 are assembled is configured.
  • a meshing gear 324Z is provided on the surface of the front end side F of the ring body 322 that constitutes the lock ring 32Z, and is arranged on the base end side B of the lock bearing 30Z (outer ring 31Z). .
  • the lock ring 32Z arranged on the base end side B of the lock bearing 30Z (outer ring 31Z) is sandwiched between the flange portion of the middle body portion 112 of the body 11 and the outer ring 31Z.
  • the rotation fixing tab 323 is fitted in the fixing concave portion 112a formed in the distal end side F of the flange portion.
  • FIG. 22 shows a front view of an electric power tool provided with the chuck device 1W
  • FIG. 23 shows an exploded perspective view of each component of the chuck device 1W from the base end side B
  • FIG. 24 shows each component of the chuck device 1W
  • 25 shows a longitudinal sectional view of the chuck device 1W.
  • FIG. 26 shows an explanatory diagram of the nut ring 22W and the spring ring 34W
  • FIG. 27 shows an explanatory diagram of the assembled nut ring 22W and the spring ring 34W
  • FIG. 28 shows the outer sleeve 24W and the assembled nut ring 22W. and an explanatory diagram of a spring ring 34W.
  • FIG. 26(a) shows a perspective view of the nut ring 22W and the spring ring 34W from the proximal side B
  • FIG. 26(b) is a perspective view of the nut ring 22W and the spring ring 34W from the distal side F. is shown.
  • FIG. 27(a) shows a perspective view of the nut ring 22W and the spring ring 34W assembled from the base end side B
  • FIG. A perspective view of the spring ring 34W is shown.
  • 28(a) shows a view of the outer sleeve 24W viewed from the base end side B
  • FIG. 28(b) shows a view of the assembled nut ring 22W and spring ring 34W viewed from the distal end side F. .
  • FIG. 29 to 31 show explanatory diagrams by sectional views of the chuck device 1W in each state. Specifically, FIG. 29(a) shows a cross-sectional view of the chuck device 1W in a loosened state taken along line DD in FIG. 25, and FIG. 29(b) shows a cross-sectional view taken along line EE in FIG. 25 in the same state. showing.
  • FIG. 30(a) shows a cross-sectional view of the chuck device 1W in the middle of tightening as seen from the arrows DD in FIG. 25, and FIG. 30(b) shows a cross-sectional view from the arrows EE in FIG. 31(a) shows a cross-sectional view of the chuck device 1W in the tightened state taken along line DD in FIG. 25, and FIG. 31(b) shows a cross-sectional view taken along line EE in FIG. 25 in the same state.
  • the same components as those in the above-described chuck devices 1, 1X, 1Y, etc. are denoted by the same reference numerals, and their descriptions are omitted.
  • the jaws 12 and balls 33 in the chuck device 1W have the same configuration as the jaws 12 and balls 33 in the above description
  • the outer ring 31Z and the lock ring 32Z in the chuck device 1W are the same as those in the chuck device 1Y in the above description. Since the configurations are the same as those of the outer ring 31Z and the lock ring 32Z in , the description thereof will be omitted.
  • the chuck device 1W is installed at the tip of the power tool K as shown in FIG. 22.
  • a lock/release mechanism 20W to which a lock bearing 30W is attached is attached to 10W.
  • the chuck mechanism 10W is composed of a body 11W and jaws 12. As shown in FIG.
  • the body 11W is composed of a rear body portion 111, a middle body portion 112, and a front body portion 113 from the base end side B, and has an insertion hole 114 extending in the axial direction X at the center. It is formed in a cylindrical shape and has flange portions at three locations in the circumferential direction of the body 11W. A jaw mounting hole 115 is arranged to communicate with the insertion hole 114 in the direction. It should be noted that the three jaw mounting holes 115 are formed such that the intersections of extension lines in the radially inner direction are on the axial direction X. As shown in FIG. Unlike the body 11 described above, the body 11W has an axially extending spline formed on the outer peripheral surface of the rear body portion 111 to fit with an inner cylindrical portion 213W of a back sleeve 21W described later.
  • the chuck mechanism 10W is configured by inserting the jaws 12 into the jaw mounting holes 115 of the body 11W configured as described above. At this time, the jaw 12 is inserted into the jaw mounting hole 115 so that the screw groove 121 faces radially outward.
  • the lock bearing 30W has a lock ring 32Z and an elastic ring arranged in order from the base end side B toward the distal end side F in the axial direction X. 35, an outer ring 31Z, a ball 33, and a spring ring 34W.
  • the lock bearing 30W has the lock ring 32Z disposed on the base end side B of the outer ring 31Z, and an elastic ring between the lock ring 32Z and the outer ring 31Z. 35 are provided.
  • the configuration of the lock ring 32Z is as described above, and the general configuration of the outer ring 31Z is as described above, so description thereof will be omitted.
  • the radially outer side of the meshing groove 315Z gear teeth is inclined toward the tip end side F, and the radially inner side of the top of the gear tooth of the meshing groove 315Z is enlarged as shown in FIG.
  • a flat surface 317 is provided generally parallel to the plane of the rear ring surface 312 .
  • the spring ring 34W has a front ring surface 342 with a central opening 341, semicircular tabs 347 (347R, 347L) at the tip, and ratchet pawls 348 (348R, 348L), similar to the spring ring 34 in the chuck device 1 described above.
  • a spring arm 346 has a forward protrusion 344 having a connecting spring piece 345W provided in the counterclockwise direction L and the clockwise direction R.
  • a second semicircular tab 349 is provided on the distal end side F of the connecting spring piece 345W. I have.
  • the distal end side F of the connecting spring piece 345W is provided with a semicircular second semicircular tab 349 that extends from the counterclockwise direction L to the clockwise direction R and protrudes radially outward.
  • the second semicircular tab 349 is arranged in the same direction as the R side semicircular tab 347R.
  • a connecting spring piece 345W having a second semicircular tab 349 on the distal end side F is fitted with a nut ring 22W, which will be described later, similarly to the connecting spring piece 345W of the spring ring 34 of the chuck device 1 described above. It functions as a torsion spring that supports the second semicircular tab 349 .
  • the elastic ring 35 is a ring body made of elastic resin and having a circular cross section. placed.
  • the lock ring 32Z and the outer ring 31Z whose rotational direction is restricted to the body 11W by the rotation fixing tab 323 come close to each other in the counterclockwise direction L against the elastic force of the elastic ring 35, and the front end side of the lock ring 32Z.
  • a meshing gear 324Z formed on F and a meshing groove 315Z formed on the base end side B of the outer ring 31Z mesh with each other to restrict the rotational direction of the outer ring 31Z with respect to the body 11W via the lock ring 32Z.
  • the elastic force of the elastic ring 35 separates the outer ring 31Z from the lock ring 32Z to disengage the meshing gear 324Z and the meshing groove 315Z.
  • the lock bearing 30W is constructed by assembling the lock ring 32Z, the elastic ring 35, the outer ring 31Z, the balls 33, and the spring ring 34W configured as described above. Specifically, the meshing gear 324Z formed on the front end side F surface of the ring main body 322 of the lock ring 32Z and the meshing groove 315Z formed on the base end side B surface of the rear ring surface 312Z of the outer ring 31Z face each other. The lock ring 32Z and the outer ring 31Z are arranged so as to do. At this time, an elastic ring 35 is arranged between the lock ring 32Z and the outer ring 31Z.
  • a plurality of balls 33 are arranged on the tip side F of the outer ring 31Z, and the spring ring 34W is assembled from the tip side F thereof.
  • the spring ring 34W is arranged so that the inner peripheral surface 343 straddles the radially inner side and the tip side F of the plurality of balls 33 arranged on the tip side F of the outer ring 31Z.
  • the ratchet pawl 348 provided at the tip of the spring arm 346 of the connecting spring piece 345W is engaged with the ratchet gear 314 formed on the inner surface of the outer peripheral side surface 313 of the outer ring 31Z, and the lock bearing 30W is assembled. is completed.
  • the L-side ratchet pawl 348L does not engage with the ratchet gear 314, but when the R-side ratchet pawl 348R engages with the ratchet gear 314, the spring ring 34W rotates clockwise relative to the outer ring 31Z. can rotate smoothly in the counterclockwise direction L.
  • the lock/release mechanism 20W is composed of a back sleeve 21W, a nut ring 22W, an inner sleeve 23W, an outer sleeve 24W, and the lock bearing 30W described above. . More specifically, as shown in FIGS. 23 to 25, the lock/release mechanism 20W includes the lock bearing 30W described above, a back sleeve 21W shown on the base end side B in the axial direction X from the lock bearing 30W, and a lock A nut ring 22W, an inner sleeve 23W, and an outer sleeve 24W shown in the figure are arranged on the tip end side F in the axial direction X from the bearing 30W.
  • the back sleeve 21W includes a ring main body 212W that constitutes the back surface of the chuck device 1W, has a circular opening 211 that allows insertion of the rear body portion 111 of the body 11W, and an inner peripheral edge of the ring main body 212W that forms the circular opening 211. It is composed of an inner cylindrical portion 213W protruding to the tip side F in the axial direction X and an outer cylindrical portion 214W protruding to the tip side F in the axial direction X at the outer peripheral edge of the ring main body 212W.
  • the inner cylindrical portion 213W has an inner diameter that allows it to be press-fitted into the rear body portion 111 of the body 11W, and has a height about 1/3 times that of the outer cylindrical portion 214W.
  • the end portion of the outer cylindrical portion 214W, which is formed to be about three times as high as the inner cylindrical portion 213W, on the tip side F in the axial direction X is a diameter-reduced end portion 214Wa whose diameter is reduced so that the outer diameter side has a stepped shape.
  • the nut ring 22W has the same configuration as the nut ring 22 described above, and is composed of a ring-shaped ring body 222 having a truncated cone-shaped opening 221. Three concave differential concave portions 223 are formed at predetermined intervals in the circumferential direction so that differential convex portions 231 of an inner sleeve 23W, which will be described later, can be loosely fitted in the circumferential direction.
  • connection recesses 224W are formed on the outer peripheral surface of the ring body 222 at locations corresponding to the forward protrusions 344, similarly to the nut ring 22. As shown in FIG. Like the connecting recess 224 of the nut ring 22, the connecting recess 224W is recessed radially inward to allow the fitting of the connecting spring piece 345W of the forward projecting portion 344 of the spring ring 34W. The bottom is formed in a V-shaped concave shape when viewed from the tip end side F. As shown in FIG.
  • a helical fitting screw groove (not shown) with which the screw groove 121 of the jaw 12 meshes is formed.
  • the fitting thread groove is formed at a spiral angle corresponding to the thread groove 121 of the jaw 12 described above, and is formed with a spiral length corresponding to a plurality of turns.
  • the nut ring 22W configured as described above is assembled with the lock bearing 30W described above, as shown in FIGS. Specifically, the connecting spring piece 345W of the forward protruding portion 344 of the spring ring 34W assembled to the lock bearing 30W is inserted into the connecting recess 224W of the nut ring 22W arranged on the tip side F, and the spring ring 34W and the nut ring are inserted. 22W are connected.
  • the nut ring 22W assembled with the lock bearing 30W in this manner is fixed in the rotational direction with the spring ring 34W.
  • the second semicircular tab 349 provided on the distal end side F of the connecting spring piece 345W fitted in the connecting concave portion 224W having a substantially V-shaped bottom when viewed from the distal end side F is It protrudes to the tip side F from the nut ring 22W.
  • the connecting spring piece 345W Since the bottom of the connecting recess 224W into which the connecting spring piece 345W is fitted is formed in a substantially V shape when viewed from the tip side F, a space is formed radially inside the connecting spring piece 345W. Therefore, when a radially inward external force acts on the second semicircular tab 349, the connecting spring piece 345W provided on the distal end side F of the second semicircular tab 349 can be torsionally deformed. Therefore, an urging force acts on the second semicircular tab 349 to restore the torsional deformation of the connecting spring piece 345W.
  • the inner sleeve 23W has a cylindrical shape that is slightly smaller than the outer sleeve 24W. It is formed with a length about half that of the outer sleeve 24W. Then, it is mounted so as to be fitted onto the middle body portion 112 of the body 11W.
  • the differential convex portion 231 and the guide grooves 232 (232R, 232L) provided on the inner sleeve 23 described above are provided as a differential convex portion 243 and the guide grooves 242 (242R, 242L) on the outer sleeve 24W, which will be described later. .
  • the outer sleeve 24W is slightly larger than the inner sleeve 23W and allows the inner sleeve 23W to be fitted therein from the base end side B in the axial direction X. It has the same diameter, and is formed in a substantially bell-shaped tubular shape in a side view with a narrowed tip side having a tip opening 241 .
  • the outer sleeve 24W is provided with the differential projections 243 corresponding to the differential projections 231 provided on the inner sleeve 23 and guide grooves corresponding to the guide grooves 232 provided on the inner sleeve 23. 242, and a second guide groove 244 for guiding the second semi-circular tab 349 is provided.
  • FIG. 28A which is a view of the outer sleeve 24W from the proximal side B, the inner peripheral side of the distal side F from the center in the axial direction X, toward the proximal side B.
  • Three differential projections 243 projecting and loosely fitted in the differential recesses 223 formed on the surface of the front end side F of the nut ring 22W are formed at three locations in the circumferential direction at predetermined intervals.
  • guide grooves 242 (242R, 242L) for locking the semicircular tabs 347 of the forward projecting portion 344 are provided on the inner peripheral surface on the base end side B from the differential convex portion 243 .
  • the guide groove 242 is an R-side guide groove 242R arranged in the clockwise direction R in which the R-side semicircular tab 347R of the R-side spring arm 346R is fitted and guided. and an L-side guide groove 242L arranged in the counterclockwise direction L to which the L-side semicircular tab 347L of the L-side spring arm 346L is fitted and guided.
  • the R-side guide groove 242R is arranged in the counterclockwise direction L of the R-side guide groove 242R, and has a deep groove portion 242Ra where the locked R-side semicircular tab 347R is radially outside. , a shallow groove portion 242Rb arranged in the clockwise direction R in the R-side guide groove 242R and engaging the R-side semicircular tab 347R to be urged radially inward, and a deep groove portion 242Ra formed in the counterclockwise direction L. There is a chamfered groove portion 242Rc.
  • the L-side guide groove 242L in the counterclockwise direction L that guides the L-side semicircular tab 347L is arranged in the counterclockwise direction L in the L-side guide groove 242L and locked, similarly to the R-side guide groove 242R.
  • a deep groove portion 242La in which the L-side semicircular tab 347L is radially outward, and a shallow groove portion disposed in the clockwise direction R in the L-side guide groove 242L and in which the L-side semicircular tab 347L to be engaged is biased radially inward.
  • the shallow groove portions 242Rb and 242Lb and the chamfered groove portion 242Rc to which the locked semicircular tab 347 is urged radially inwardly are urged radially inwardly in the assembled state.
  • the semicircular tab 347 and the ratchet pawl 348 arranged side by side are spaced radially inward from the ratchet gear 314 of the outer ring 43Z, and are formed to a depth that moves to a position where the engagement with the ratchet gear 314 is released. .
  • the circumferential distance between the deep groove portion 242La and the shallow groove portion 242Lb and the circumferential distance between the shallow groove portion 242Rb and the chamfered groove portion 242Rc are equal to the differential convex portion of the inner sleeve 23W and the differential concave portion 223 of the nut ring 22W.
  • 243 is loosely fitted, that is, the rotation amount of the inner sleeve 23W differentially rotated in the circumferential direction with respect to the nut ring 22W.
  • the circumferential distance between the chamfered groove portion 242Rc and the deep groove portion 242La and the circumferential distance between the shallow groove portion 242Rb and the shallow groove portion 242Lb are determined by the R-side semicircular tab in the clockwise direction R provided in the front projection portion 344. 347R and the R-side semicircular tab 347R in the counterclockwise L direction.
  • the L-side semicircular tab 347L in the counterclockwise direction L is the deep groove of the L-side guide groove 242L. It is guided between the portion 242La and the shallow groove portion 242Lb.
  • the second guide grooves 244 for guiding the second semicircular tabs 349 are arranged at intervals in the circumferential direction, and have two deep groove portions 244a on which the locked second semicircular tabs 349 are located on the radially outer side.
  • the second guide groove 244 is formed in a groove shape in which two deep groove portions 244a, a chamfered groove portion 244b, and a convex groove portion 244c are continuously integrated in a substantially hump shape.
  • sleeves 23W and 24W are defined as sleeves 23W and 24W in which the inner sleeve 23W is inserted inside the outer sleeve 24W.
  • the inner sleeve 23W and the outer sleeve 24W may be assembled separately as described above, but they may be integrally formed.
  • the back sleeve 21W is attached to the body 11W from the base end side B in the axial direction X by first inserting the rear body portion 111 of the body 11W into the circular opening 211. do.
  • the inner cylindrical portion 213W whose inner surface is formed to have approximately the same diameter as the outer surface of the rear body portion 111, is press-fitted into the rear body portion 111, the back sleeve 21W can rotate in the axial direction X and rotate with respect to the body 11W. It is mounted in a fixed state in both directions.
  • the lock bearing 30W with the nut ring 22W assembled is attached from the tip side F of the body 11W where the jaw 12 is inserted into the jaw attachment hole 115, and the screw grooves 121 of all the jaws 12 and the lock bearing 30W are attached as described above.
  • the lock bearing 30W is attached to the body 11W while screwing it into the fitting screw groove of the nut ring 22W.
  • the rotation fixing tabs 323 of the lock ring 32Z constituting the lock bearing 30W are engaged with the fixing recesses 112a formed in the middle body portion 112, the lock ring 32Z is rotationally fixed with respect to the body 11W. .
  • outer sleeve 24W integrated by press-fitting the inner sleeve 23W inside is inserted from the front end side F of the body 11W to which the lock bearing 30W with the nut ring 22W is mounted as described above.
  • the semicircular tab 347 of the spring ring 34W of the lock bearing 30W is engaged with the guide groove 232 of the inner sleeve 23W, and the differential projection 231 of the inner sleeve 23W is loosely fitted into the differential recess 223 of the nut ring 22W. Then, the assembly of the chuck device 1W is completed.
  • the ratchet gear 314 of the outer ring 31Z and the ratchet pawl 348 of the spring ring 34W may be locked.
  • the base shaft 5a of the rotating jig 5 is inserted from the distal end side F into the insertion hole 114 of the body 11W, and the sleeves 23W and 24W are rotated in the clockwise direction R. .
  • the nut ring 22W rotates clockwise because the semicircular tab 347 is engaged with the guide groove 232 by the biasing force of the spring arm 346 .
  • the locking/unlocking mechanism 20W is in the unlocked state shown in FIG. 29, for example, according to the previous state of use.
  • both the R-side semicircular tab 347R and the L-side semicircular tab 347L are positioned in the shallow grooves 242Rb and 242Lb, as shown in the enlarged view of part a and the enlarged view of part b in FIG. 29(a).
  • the ratchet pawl 348 is not meshing with the ratchet gear 314 .
  • the second semicircular tab 349 engaged with the second guide groove 244 is positioned in the deep groove portion 244a in the clockwise direction R, as shown in the enlarged view of c in FIG. 29(c). .
  • the differential protrusion 243 fitted in the differential recess 223 of the nut ring 22W is arranged at a position in the counterclockwise direction L in the differential recess 223 .
  • the three jaws 12 synchronously advance through the jaw mounting holes 115 and rotate the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 in three circumferential directions. It will be grasped from the direction.
  • the sleeves 23W and 24W differentially rotate in the clockwise direction R with respect to the nut ring 22W, which cannot be rotated, so that the differential convexity loosely fitted in the differential concave portion 223 as shown in FIG. Although the portion 243 moves in the clockwise direction R, it is not in contact with the end surface 222a of the ring main body 222 .
  • the second semicircular tab 349 climbs over the convex groove portion 244c in the second guide groove 244, as shown in the enlarged view of c part of FIG. It is located in the deep groove portion 244a in the clockwise direction L.
  • the sleeves 23W and 24W are rotated in the clockwise direction R
  • the sleeves 23W and 24W differentially rotate in the clockwise direction R with respect to the nut ring 22W in the locked state, as shown in FIG.
  • the semicircular tabs 347 in the guide groove 242 are positioned in the chamfered groove portions 242Rc and 242Lc.
  • the semicircular tabs 347 When the semicircular tabs 347 are positioned at the chamfered grooves 242Rc and 242Lc, the semicircular tabs 347R. Since the 347L moves radially inward, the ratchet pawl 348 also moves radially inward and is disengaged from the ratchet gear 314, as shown in the enlarged view of part a and the enlarged view of part b in FIG. Unlocked.
  • the biasing force of the spring arms 346 acts on the chamfered grooves 242Rc and 242Lc via the semicircular tab 347, 23W and 24W are differentially rotated in the counterclockwise direction L with respect to nut ring 22W, and semicircular tabs 347 are positioned in deep grooves 242Ra and 242La to enter a locked state (state shown in FIG. It is possible to prevent the gripping state from being released carelessly.
  • the sleeves 23W and 24W are rotated in the clockwise direction R so that the jaws 12 grip the base shaft 5a more firmly, and the force to rotate the sleeves 23W and 24W in the clockwise direction R is applied. If at least one of the ratchet pawls 348 is positioned at the gear top of the ratchet gear 314 in the released state, the semicircular tab 347 cannot move radially outward, and the unlocked state may be maintained.
  • a biasing force in the direction of restoring the twist of the connecting spring piece 345W acts on the convex groove portion 244c through the second semicircular tab 349, which is restricted radially inwardly by twisting the connecting spring piece 345W.
  • the sleeves 23W, 24W are differentially rotated in the counterclockwise direction L until the two semicircular tabs 349 are positioned in the deep groove portion 244a in the counterclockwise direction L, thereby preventing the sleeves 23W, 24W from unnaturally rattling. .
  • the ratchet pawls 348R and 348L positioned at the gear top of the ratchet gear 314 are displaced from the gear top due to external forces such as vibrations generated when the chuck device 1W is used, etc. Without loosening the state, it is immediately engaged with the ratchet gear 314 and becomes the locked state shown in FIG.
  • the sleeves 23W and 24W are rotated in the counterclockwise direction L to rotate the body 11W. Since the ratchet pawl 348 is engaged with the ratchet gear 314 fixed to rotate, the nut ring 22W does not rotate, and the sleeves 23W and 24W rotate differentially with respect to the nut ring 22W. It will be in the unlocked state shown.
  • the chuck device 1W has the same effect as the above-described chuck device 1, and the second guide groove 244 has the second guide groove 244 regardless of the relative rotation positions of the nut ring 22W and the sleeves 23W and 24W.
  • a semicircular tab 349 is guided, and the sleeves 23W and 24W can be differentially rotated with respect to the nut ring 22W to ensure a locked state.
  • a second guide groove 244 is provided in the sleeves 23W and 24W, and a second semicircular tab 349 guided by the second guide groove 244 is pushed into the second guide groove 244.
  • a connecting spring piece 345W is attached to the nut ring 22W, and the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W as the second semicircular tab 349 is guided by the second guide groove 244.
  • the second semicircular tabs 349 attached to the nut ring 22W are guided by the second guide grooves 244 provided in the sleeves 23W and 24W, thereby adjusting the relative rotational positions of the sleeves 23W and 24W with respect to the nut ring 22W.
  • By positioning it is possible to reliably prevent unnatural rattling.
  • the second guide groove 244 has a deep groove portion 244a with a large groove depth and a chamfered groove portion 244b with a shallow groove depth, and the second semi-circular tab 349 protrudes toward the guide groove.
  • a second semicircular tab 349 formed in an arc shape and located in the chamfered groove portion 244b of the second guide groove 244 is guided to the deep groove portion 244a by the biasing force of the connecting spring piece 345W, and is chamfered in the second guide groove 244.
  • the sleeves 23W and 24W are guided from the groove portion 244b to the deep groove portion 244a, the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W.
  • the semicircular tabs 347 (347R, 347L) are not completely guided by the guide grooves 242 (242R, 242L), and the second semicircular tabs are formed in an arc shape at the relative rotational positions between the nut ring 22W and the sleeves 23W, 24W.
  • 349 is guided from the chamfered groove portion 244b of the second guide groove 244 to the deep groove portion 244a, and the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W to reliably prevent unnatural rattling. can.
  • the connecting spring piece 345W is composed of a torsion spring, even the compact connecting spring piece 345W can exert a strong biasing force. Therefore, the second semi-circular tab 349 can be strongly urged against the second guide groove 244 and the second semi-circular tab 349 can be reliably guided by the second guide groove 244 .
  • connection spring piece 345W made of a torsion spring can be deformed
  • the connection spring piece 345W can be torsionally deformed to exert a strong biasing force. Therefore, the second semi-circular tab 349 can be strongly urged against the second guide groove 244 and the second semi-circular tab 349 can be reliably guided by the second guide groove 244 .
  • the elastic ring 35 is provided to urge the meshing groove 315Z and the meshing gear 324Z in the axial direction X to separate them from each other, the rotation input of the sleeves 23W and 24W in the clockwise direction R rotates the base shaft 5a.
  • the meshing gear 324Z and the meshing groove 315Z which are meshed by the movement of the nut ring 22W toward the base end side B using the gripping jaw 12 as a reaction force, move the nut ring 22W toward the base end side B using the jaws 12 as a reaction force.
  • the flat surface 317 is formed on the inner diameter side of the gear teeth of the meshing groove 315Z of the outer ring 31Z, when the meshing gear 324Z of the lock ring 32Z and the meshing groove 315Z are in non-meshing proximity, the meshing gear 324Z is Interference noise caused by interference between the gear groove and the gear teeth of the meshing groove 315Z can be prevented.
  • the sleeves 23W and 24W are rotated in the clockwise direction R, and the nut ring 22W and the lock bearing 30W are moved toward the base end side B using the reaction force of the jaw 12 gripping the base shaft 5a inserted into the insertion hole 114.
  • It has a ratchet gear 314 with which a semicircular tab 347 engages with the gear groove of the meshing gear 324Z of the lock ring 32Z rotationally fixed to the body 11W and the gear teeth of the meshing groove 315Z of the outer ring 31Z by movement.
  • the outer ring 31Z is rotationally fixed with respect to the body 11W.
  • the engagement gear 324Z of the lock ring 32Z rotationally fixed to the body 11W by the rotation fixing tab 323, the engagement groove 315Z of the outer ring 31Z, and the jaw 12 for gripping the base shaft 5a.
  • the outer ring 31Z having the ratchet gear 314 engaged with the semi-circular tab 347 is rotationally fixed to the body 11W by moving it in the axial direction X as a reaction force and engaging it, but the chuck device shown in FIG. 32 and FIG. As in 1V, the lock ring 32Z may not be provided, and instead of the outer ring 31Z, an outer ring 31X whose rotation can be fixed with respect to the body 11W by the rotation fixing tabs 316 may be used.
  • the chuck device 1V has the same configuration as the chuck device 1W except that the lock ring 32Z is not provided and the outer ring 31X is used instead of the outer ring 31Z, and the same effects as those of the chuck device 1W and the chuck device 1X are obtained. can be done.
  • the axis of the present invention corresponds to the axial direction X, and so on,
  • the chuck device corresponds to the chuck device 1
  • the rotating jig corresponds to the rotating jig 5
  • the base axis corresponds to the base axis 5a
  • the shaft hole corresponds to the insertion hole 114
  • the chuck body corresponds to bodies 11 and 11W
  • the angled holes correspond to the jaw mounting holes 115
  • the chuck claw corresponds to jaw 12
  • the rotary input bodies correspond to the sleeves 23, 24, 23W and 24W
  • the nut ring corresponds to nut ring 22, 22W
  • the rotation transmission part corresponds to the differential convex part 231
  • the locking means correspond to the ratchet gear 314 and the ratchet pawl 348
  • the unlocking means correspond to the guide groove 232 and the semicircular tab 347
  • the tightening direction locking means corresponds to the ratchet gear 314 and the L side ratchet pawl
  • the chuck device 1 described above may be attached not only to the power tool K having the rotatable spindle 4, but also to a rotating power tool such as a vibrating drill or an electric driver.
  • both the L-side ratchet pawl 348L and the R-side ratchet pawl 348R engage with the ratchet gear 314 due to the differential rotation of the sleeves 23 and 24 relative to the nut ring 22 in the counterclockwise direction L.
  • the differential rotation of the sleeves 23 and 24 in the clockwise direction R and the counterclockwise direction L with respect to the nut ring 22 causes the R side ratchet pawl 348R and
  • the L-side ratchet pawl 348L is configured to be disengaged from both ratchet gears 314, the R-side ratchet pawl 348R is disengaged due to the differential rotation of the sleeves 23 and 24 relative to the nut ring 22 in the clockwise direction R. It may be configured such that locking to the ratchet gear 314 is released, and differential rotation in the counterclockwise direction L releases locking of the L-side ratchet pawl 348L to the ratchet gear 314 .
  • Reference Signs List 1 1X, 1Y Chuck device 4 Spindle 5 Rotating jig 5a Base shaft 11 Body 12 Jaws 22, 22W Nut ring 23 Inner sleeves 30, 30Z Lock bearings 31, 31X, 31Z Outer ring 32 , 32Z... Lock ring 33... Ball 35... Elastic ring 114... Insertion hole 115... Jaw mounting hole 224W... Connection concave part 231... Differential convex part 232, 232Y, 242... Guide groove 232R, 232YR, 242R...

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

[Problem] The purpose of the present invention is to provide a chuck device and an electric tool capable of achieving tightening that avoids a locked state from being inadvertently unlocked, and prevents the locked state from becoming unable to be unlocked. [Solution] A chuck device 1 has: an L-side ratchet pawl 348L that restricts rotation of a nut ring 22 in a counterclockwise direction L relative to a body 11 of the chuck device 1; an R-side ratchet pawl 348R that restricts the rotation in a clockwise direction R; an L-side guide groove 232L and an L-side semicircular tub 347L for removing the rotation restriction of the L-side ratchet pawl 348L; and an R-side guide groove 232R and an R-side semicircular tub 347R for removing the rotation restriction of the R-side ratchet pawl 348R. The L-side guide groove 232L and the L-side semicircular tub 347L remove the rotation restriction of the L-side ratchet pawl 348L by differential rotation of sleeves 23, 24 in the counterclockwise direction L, and the R-side guide groove 232L and the R-side semicircular tub 347R remove the rotation restriction of the R-side ratchet pawl 348R by differential rotation in the clockwise direction R.

Description

チャック装置及び電動工具Chuck device and power tool
　この発明は、例えば、インパクトドライバーや振動ドリルのような電動工具において、ドライバ治具やドリル治具等の回転治具の基軸を挿入し、締め付けて固定するチャック装置及び電動工具に関する。 The present invention relates to a chuck device and an electric power tool, for example, in an electric power tool such as an impact driver or a vibration drill, in which a base shaft of a rotary jig such as a driver jig or a drill jig is inserted and tightened to fix it.
　従来より、電動ドライバ等の先端に配置するチャック装置として、挿入された回転治具の基軸を爪（ジョー）で三方向から締付けて固定し、締付け状態をロックするロック機構を備えたチャック装置が提案されている（特許文献１参照）。 Conventionally, as a chuck device placed at the tip of an electric screwdriver, etc., there has been a chuck device equipped with a locking mechanism that locks the tightened state by clamping the base shaft of an inserted rotary jig from three directions with jaws. proposed (see Patent Document 1).
　このチャック装置は、チャック本体に対して軸方向が拘束された係止リングと、ラチェット本体に対して軸方向に移動可能な保持リングとを備えている。そして、前記係止リング及び前記保持リングのそれぞれの対向面に、緩み方向に対して噛合するラチェットギアが形成されている。 This chuck device includes a locking ring that is axially constrained with respect to the chuck body, and a retaining ring that is axially movable with respect to the ratchet body. A ratchet gear that meshes in the direction of loosening is formed on each of the opposing surfaces of the locking ring and the retaining ring.
　したがって、保持リングを軸方向に移動させ、係止リング及び保持リングのラチェットギアが噛合することによって、締付け固定状態において、締付け解除方向の回転を規制し、締付け状態をロックすることができるとされている。 Therefore, by moving the retaining ring in the axial direction and meshing the locking ring and the ratchet gear of the retaining ring, it is possible to restrict the rotation in the tightening release direction and lock the tightening state in the tightened and fixed state. ing.
　しかしながら、回転治具の基軸をジョーで三方向から固定する締付け状態をロック機構でロックして回転駆動させ、回転治具で削孔等を行う際の振動による共振や慣性力によって、回転入力体が締付け解除方向に回転して、ロック状態が不用意に解除されたり、回転入力体がさらに締付け方向に回転して、ロック状態が解除できなくなったりするおそれがあった。 However, due to resonance and inertial force caused by vibration when drilling holes with the rotating jig, the rotation input body may be affected by the resonance and inertial force caused by the locking mechanism that locks the clamping state in which the base shaft of the rotating jig is fixed from three directions by the jaws. may rotate in the tightening release direction to unintentionally release the locked state, or the rotary input body may rotate further in the tightening direction, making it impossible to release the locked state.
特開平６－２７７９１３号公報JP-A-6-277913
　そこでこの発明は、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることのない締付けを実現できるチャック装置及び電動工具を提供することを目的とする。 Therefore, an object of the present invention is to provide a chuck device and an electric tool that can achieve tightening without inadvertently releasing the locked state or preventing the locked state from being released.
　この発明は、軸心上で回転可能な駆動軸を有する駆動装置に装着するチャック装置であって、前記軸心上に配置され、先端側に回転治具の基軸の挿入を許容する軸孔を有する略円筒状のチャック本体と、該チャック本体において、先端側で前記軸孔に連絡するとともに、後端側で前記チャック本体の側方に開口する傾斜孔に挿着され、前記チャック本体に対して移動可能に配置された複数のチャック爪と、前記チャック本体に対して回転自在に装着するとともに、回転操作によって回転力を入力する回転入力体と、前記チャック本体に回動可能に保持されるとともに、前記チャック本体及び前記チャック爪に対する螺合によって前記複数のチャック爪を同期して前記傾斜孔内を傾斜方向に移動させるナットリングと、前記回転入力体の前記回転力を前記ナットリングに伝達する回転伝達部と、前記チャック本体に対する前記ナットリングの回転を規制するロック手段と、前記ロック手段による前記ナットリングの回転規制を解除するロック解除手段とが備えられ、前記ロック手段は、締付け方向の回転を規制する締付け方向ロック手段と、緩み方向の回転を規制する緩み方向ロック手段とがあり、前記ロック解除手段は、前記締付け方向ロック手段の回転規制を解除する締付け方向ロック解除手段と、前記緩み方向ロック手段の回転規制を解除する緩み方向ロック解除手段とがあり、前記ロック手段は、前記チャック本体に設けられたギア状の係止溝と、前記ナットリングに取付けられ、前記係止溝に係止する係止爪とを有し、前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除することを特徴とする。 The present invention is a chuck device to be attached to a drive device having a drive shaft rotatable on its axis, which is arranged on the axis and has a shaft hole on the tip end side for allowing insertion of a base shaft of a rotary jig. a substantially cylindrical chuck body having a chuck body, which is connected to the shaft hole on the front end side and is inserted into an inclined hole opened to the side of the chuck body on the rear end side, and is attached to the chuck body; a plurality of chuck claws movably arranged on the chuck body; a rotation input member rotatably mounted on the chuck body for inputting a rotational force by a rotational operation; a nut ring for synchronously moving the plurality of chuck claws in the inclined hole in the inclined direction by screwing the chuck main body and the chuck claws; and transmitting the rotational force of the rotation input body to the nut ring. a rotation transmitting portion for rotating the nut ring with respect to the chuck body; and a lock releasing means for releasing the rotation restriction of the nut ring by the locking means. tightening direction lock means for regulating rotation of and loosening direction lock means for regulating rotation in the loosening direction; Loosening direction lock release means for releasing the rotation restriction of the loosening direction lock means is provided, and the lock means includes a gear-shaped locking groove provided in the chuck body, and is attached to the nut ring. The tightening direction unlocking means restricts the rotation of the tightening direction lock means by differentially rotating at least the rotational input body and the nut ring in the tightening direction. The loosening direction lock release means releases the rotation restriction of the loosening direction lock means by differential rotation in the loosening direction of at least the rotation input body and the nut ring.
　またこの発明は、駆動装置と、該駆動装置の駆動回転を軸心上に伝達する駆動伝達手段とが備えられるとともに、上述のチャック装置が前記回転伝達手段によって回転可能に備えられた電動工具であることを特徴とする。 Further, the present invention is an electric power tool comprising a driving device and a driving transmission means for transmitting driving rotation of the driving device on an axis, and wherein the above-mentioned chuck device is rotatably provided by the rotation transmission means. characterized by being
　上記回転可能な駆動軸を有する駆動装置は、インパクトドライバー、振動ドリルや電動ドライバ等の回転電動工具とすることができる。　
　上記回転治具とは、回転するドリル治具や、プラスやマイナスのドライバ治具などとすることができる。　
　上記回転治具の基軸は工具シャンクともいい、上記チャック爪はジョーともいう。 The drive device having the rotatable drive shaft can be a rotary power tool such as an impact driver, a vibrating drill, or an electric driver.
The rotating jig can be a rotating drill jig, a plus or minus driver jig, or the like.
The base shaft of the rotating jig is also called a tool shank, and the chuck claws are also called jaws.
　この発明により、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることのない締付けを実現することができる。　
　詳述すると、前記ロック解除手段は、前記締付け方向ロック手段の回転規制を解除する締付け方向ロック解除手段と、前記緩み方向ロック手段の回転規制を解除する緩み方向ロック解除手段とがあり、前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除する。そのため、前記回転入力体と前記ナットリングとを差動回転させなければ、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることを防止することができる。 According to the present invention, it is possible to achieve tightening that prevents the locked state from being unintentionally released or the locked state from which it becomes impossible to release.
More specifically, the lock release means includes tightening direction lock release means for releasing rotation restriction of the tightening direction lock means and loosening direction lock release means for releasing rotation restriction of the loosening direction lock means. The direction lock release means releases the rotation regulation of the tightening direction lock means by differential rotation of at least the rotation input body and the nut ring in the tightening direction, and the loosening direction lock release means operates at least the rotation input. Due to the differential rotation in the loosening direction between the body and the nut ring, the rotation restriction of the loosening direction lock means is released. Therefore, if the rotation input member and the nut ring are not differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released.
　なお、上述の前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除するとは、前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により前記締付け方向ロック解除手段が締付け方向ロック手段の回転規制を解除するとともに、前記緩み方向ロック解除手段が前記緩み方向ロック手段の回転規制を解除してもよいし、前記締付け方向ロック解除手段だけが締付け方向ロック手段の回転規制を解除してもよい。 It should be noted that the above-described tightening direction lock release means releases the rotation restriction of the tightening direction lock means by differential rotation in the tightening direction of at least the rotation input body and the nut ring. Due to the differential rotation in the tightening direction with the nut ring, the tightening direction lock release means releases the rotation restriction of the tightening direction lock means, and the loosening direction lock release means releases the rotation restriction of the loosening direction lock means. Alternatively, only the tightening direction unlocking means may release the rotation restriction of the tightening direction lock means.
　また、同様に、上述の前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除するとは、前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック解除手段が前記緩み方向ロック手段の回転規制を解除するとともに、前記締付け方向ロック解除手段が締付け方向ロック手段の回転規制を解除してもよいし、前記緩み方向ロック解除手段だけが前記緩み方向ロック手段の回転規制を解除してもよい。 Similarly, the above-described loosening direction lock release means releases the rotation restriction of the loosening direction lock means by differential rotation of at least the rotation input body and the nut ring in the loosening direction. Due to the differential rotation of the input body and the nut ring in the loosening direction, the loosening direction unlocking means releases the rotation restriction of the loosening direction locking means, and the tightening direction unlocking means rotates the tightening direction locking means. The restriction may be released, or only the loosening direction lock release means may release the rotation restriction of the loosening direction lock means.
　この発明の態様として、前記係止溝を、前記チャック本体に対して回転方向を固定する固定手段が設けられ、前記固定手段は、前記チャック本体に対して回転方向が固定された固定ギア溝と、前記係止溝に設けられ、前記固定ギア溝と軸心方向に噛合する固定ギア歯とを有し、通常状態において、前記固定ギア溝と前記固定ギア歯とは非噛合状態であり、前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって、前記固定ギア溝と前記固定ギア歯とが噛合して、前記固定ギア溝が前記チャック本体に対して固定されてもよい。 As an aspect of the present invention, fixing means for fixing the rotation direction of the locking groove to the chuck body is provided, and the fixing means is a fixed gear groove whose rotation direction is fixed to the chuck body. a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction; in a normal state, the fixed gear groove and the fixed gear tooth are in a disengaged state; The fixed gear groove and the fixed gear teeth are meshed by the movement of the nut ring to the base end side by the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotary input body. and the fixed gear groove may be fixed with respect to the chuck body.
　またこの発明は、軸心上で回転可能な駆動軸を有する駆動装置に装着するチャック装置であって、前記軸心上に配置され、先端側に回転治具の基軸の挿入を許容する軸孔を有する略円筒状のチャック本体と、該チャック本体において、先端側で前記軸孔に連絡するとともに、後端側で前記チャック本体の側方に開口する傾斜孔に挿着され、前記チャック本体に対して移動可能に配置された複数のチャック爪と、前記チャック本体に対して回転自在に装着するとともに、回転操作によって回転力を入力する回転入力体と、前記チャック本体に回動可能に保持されるとともに、前記チャック本体及び前記チャック爪に対する螺合によって前記複数のチャック爪を同期して前記傾斜孔内を傾斜方向に移動させるナットリングと、前記回転入力体の前記回転力を前記ナットリングに伝達する回転伝達部と、前記チャック本体に対する前記ナットリングの回転を規制するロック手段と、前記ロック手段による前記ナットリングの回転規制を解除するロック解除手段とが備えられ、前記ロック手段は、締付け方向の回転を規制する締付け方向ロック手段と、緩み方向の回転を規制する緩み方向ロック手段とがあり、前記ロック解除手段は、前記締付け方向ロック手段の回転規制を解除する締付け方向ロック解除手段と、前記緩み方向ロック手段の回転規制を解除する緩み方向ロック解除手段とがあり、前記ロック手段は、前記チャック本体に設けられたギア状の係止溝と、前記ナットリングに取付けられ、前記係止溝に係止する係止爪とを有し、前記係止溝を、前記チャック本体に対して回転方向を固定する固定手段が設けられ、前記固定手段は、前記チャック本体に対して回転方向が固定された固定ギア溝と、前記係止溝に設けられ、前記固定ギア溝と軸心方向に噛合する固定ギア歯とを有し、前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって、前記固定ギア溝と前記固定ギア歯とが噛合して、前記固定ギア溝が前記チャック本体に対して固定されるとともに、前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除することを特徴とする。 The present invention also provides a chuck device to be attached to a drive device having a drive shaft rotatable on the axis, wherein the shaft hole is arranged on the axis and allows insertion of a base shaft of a rotary jig on the tip end side. a substantially cylindrical chuck body having a tip end connected to the shaft hole and a rear end side of the chuck body connected to an inclined hole opened to the side of the chuck body, and is inserted into the chuck body a plurality of chuck claws movably disposed with respect to the chuck body; a rotation input body that is rotatably mounted on the chuck body and receives a rotational force through a rotational operation; a nut ring for synchronously moving the plurality of chuck claws in the inclined hole in the inclined direction by being screwed to the chuck main body and the chuck claws; a rotation transmitting portion for transmitting rotation; locking means for restricting rotation of the nut ring with respect to the chuck body; and unlocking means for releasing the restriction on rotation of the nut ring by the locking means; There are tightening direction lock means for restricting rotation in the tightening direction, and loosening direction lock means for restricting rotation in the loosening direction. and loosening direction unlocking means for releasing rotation restriction of the loosening direction lock means, and the locking means comprises a gear-shaped locking groove provided in the chuck body, and the locking means attached to the nut ring. fixing means for fixing the locking groove with respect to the chuck body in a rotational direction, the fixing means having a locking claw that locks the locking groove in the rotational direction with respect to the chuck body; and a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction. When the nut ring is moved toward the base end side by the reaction force of the chuck claws that grip the base shaft, the fixed gear grooves and the fixed gear teeth mesh with each other, and the fixed gear grooves move against the chuck body. In addition to being fixed, the tightening direction unlocking means releases the rotation restriction of the tightening direction lock means by differential rotation of at least the rotation input body and the nut ring in the tightening direction, thereby releasing the loosening direction lock. The means is at least the difference in the direction of loosening between the rotation input body and the nut ring. It is characterized in that the rotation regulation of the loosening direction lock means is released by the dynamic rotation.
　この発明により、前記係止溝を、前記チャック本体に対して回転方向を固定する固定手段が設けられ、前記固定手段は、前記チャック本体に対して回転方向が固定された固定ギア溝と、前記係止溝に設けられ、前記固定ギア溝と軸心方向に噛合する固定ギア歯とを有し、前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって、前記固定ギア溝と前記固定ギア歯とが噛合して、前記固定ギア溝が前記チャック本体に対して固定される。また、前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除する。そのため、上述のように、前記回転入力体と前記ナットリングとを差動回転させなければ、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることを防止することができる。さらに、軸孔に挿入され、複数のチャック爪で把持された回転治具の基軸がロック状態のまま不用意に抜けた場合、いわゆるセルフロック状態となっても、前記固定ギア溝と前記固定ギア歯とは非噛合状態となるため、ロック状態が解除できなくなるという不具合を解消することができる。 According to the present invention, fixing means for fixing the rotation direction of the locking groove to the chuck body is provided, and the fixing means includes a fixed gear groove whose rotation direction is fixed to the chuck body; fixed gear teeth provided in the locking groove and meshing with the fixed gear groove in the axial direction, the chuck claws gripping the base shaft acting as a reaction force due to the rotational input of the rotary input body in the tightening direction; By the movement of the nut ring toward the base end side, the fixed gear groove and the fixed gear teeth are engaged with each other, and the fixed gear groove is fixed to the chuck body. Further, the tightening direction unlocking means releases rotation restriction of the tightening direction locking means by differential rotation in the tightening direction of at least the rotation input body and the nut ring, and the loosening direction unlocking means At least the differential rotation in the loosening direction between the rotation input member and the nut ring releases the rotation restriction of the loosening direction lock means. Therefore, as described above, unless the rotation input member and the nut ring are differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released. Furthermore, when the base shaft of the rotary jig inserted into the shaft hole and gripped by the plurality of chuck claws is inadvertently pulled out in a locked state, even if a so-called self-lock state occurs, the fixed gear groove and the fixed gear do not move. Since the teeth are not meshed with each other, it is possible to solve the problem that the locked state cannot be released.
　またこの発明の態様として、前記固定ギア溝は、周方向且つ前記軸心方向に対して傾斜する帯状のリング体であり、前記周方向且つ前記軸心方向に対して傾斜する前記固定ギア溝と前記固定ギア歯とは非噛合状態であり、前記ナットリングの基端側への前記移動により、傾斜する前記固定ギア溝が捩れ変形して前記固定ギア溝と前記固定ギア歯とが噛合状態となってもよい。　
　この発明により、傾斜する前記固定ギア歯の捩れ変形によって、つまりギア溝は皿ばねとして機能し、前記固定ギア溝と前記固定ギア歯との噛合と非噛合とを切り替えることができる。 Further, as an aspect of the present invention, the fixed gear groove is a belt-shaped ring body that is inclined with respect to the circumferential direction and the axial direction, and the fixed gear groove is inclined with respect to the circumferential direction and the axial direction. The fixed gear teeth are in a non-meshing state, and the inclined fixed gear grooves are torsionally deformed by the movement of the nut ring toward the proximal end side, so that the fixed gear grooves and the fixed gear teeth are in a state of meshing. You can become
According to the present invention, the torsional deformation of the inclined fixed gear teeth, that is, the gear grooves function as disc springs, to switch between engagement and disengagement between the fixed gear grooves and the fixed gear teeth.
　またこの発明の態様として、前記固定ギア歯のギア歯における内径側にフラット部が形成されてもよい。　
　この発明により、前記固定ギア溝と前記固定ギア歯との非噛合な近接状態において、前記固定ギア溝のギア溝と前記固定ギア歯のギア歯とが干渉して干渉音が発生することを防止できる。 Further, as an aspect of the present invention, a flat portion may be formed on the inner diameter side of the gear teeth of the fixed gear teeth.
According to the present invention, when the fixed gear groove and the fixed gear tooth are in a non-engaging state of close proximity, interference noise caused by interference between the gear groove of the fixed gear groove and the gear tooth of the fixed gear tooth is prevented. can.
　またこの発明として、前記固定ギア歯と前記固定ギア溝とを前記軸心方向に離間する方向に付勢する離間方向付勢手段が設けられてもよい。　
　この発明により、前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって噛合する前記固定ギア溝と前記固定ギア歯とが、前記チャック爪を反力とした前記ナットリングの基端側への移動が解消されると、離間方向付勢手段の付勢力によって前記固定ギア歯と前記固定ギア溝とは前記軸心方向に離間する。したがって、前記チャック本体に対する前記係止溝の回転方向の固定を確実に解消することができる。 Further, as the present invention, a separation direction biasing means may be provided for biasing the fixed gear teeth and the fixed gear grooves in the axial direction to separate them.
According to the present invention, the fixed gear groove and the fixed gear groove mesh with each other when the nut ring moves toward the base end side with the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotation input body. When the movement of the gear teeth toward the base end of the nut ring with the reaction force of the chuck claws is released, the fixed gear teeth and the fixed gear grooves are separated from each other by the biasing force of the separation direction biasing means. Axially spaced apart. Therefore, it is possible to reliably release the fixation of the locking groove to the chuck body in the rotational direction.
　またこの発明の態様として、軸心方向の先端側から基点側に向かって、前記ナットリング、前記固定ギア溝及び前記固定ギア歯の順で配置され、前記ナットリングと前記固定ギア溝との間に複数の転動体が設けられ、前記ナットリング、前記転動体、前記固定ギア溝及び前記固定ギア歯でベアリングが構成されてもよい。 Further, as an aspect of the present invention, the nut ring, the fixed gear groove, and the fixed gear tooth are arranged in this order from the distal end side in the axial direction toward the base point side, and the fixed gear tooth is disposed between the nut ring and the fixed gear groove. may be provided with a plurality of rolling elements, and the nut ring, the rolling elements, the fixed gear grooves and the fixed gear teeth may form a bearing.
　この発明により、チャック本体に固定された前記固定ギア溝に対してナットリングをスムーズに回転させることができる。　
　なお、転動体は、鋼製や樹脂製である球体や円柱体で構成されてもよい。 According to this invention, the nut ring can be smoothly rotated with respect to the fixed gear groove fixed to the chuck body.
In addition, the rolling element may be configured by a spherical body or a cylindrical body made of steel or resin.
　またこの発明の態様として、前記ロック解除手段は、前記回転入力体に設けられた案内溝と、前記ナットリングに取付けられ、前記案内溝に案内される被案内部を前記案内溝に押付ける付勢部とを有し、前記係止爪は、前記被案内部とともに案内される構成であってもよい。 Further, as an aspect of the present invention, the unlocking means includes a guide groove provided in the rotary input body, and a portion attached to the nut ring and pressed against the guide groove to be guided by the guide groove. A force portion may be provided, and the locking pawl may be guided together with the guided portion.
　この発明により、前記回転入力体と前記ナットリングの差動回転により、少なくとも回転入力体に設けられた案内溝に対して付勢部によって押付けられる被案内部は、案内溝で案内されることで、係止溝に対する係止爪の係止と係止解除とを案内することができる。 According to this aspect of the invention, due to the differential rotation of the rotary input member and the nut ring, at least the guided portion pressed by the biasing portion against the guide groove provided in the rotary input member is guided by the guide groove. , the locking and unlocking of the locking pawl with respect to the locking groove can be guided.
　またこの発明の態様として、前記案内溝は、溝深さが深い深溝部と、溝深さが浅い浅溝部とを有し、前記被案内部が前記深溝部に案内されると、前記係止爪が前記係止溝に係止してロック状態となり、前記被案内部が前記浅溝部に案内されると、前記係止溝への前記係止爪の係止が解除してロック解除状態となってもよい。 Further, as an aspect of the present invention, the guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth, and when the guided portion is guided by the deep groove portion, the locking When the pawl is engaged with the engaging groove to be in a locked state and the guided portion is guided to the shallow groove, the engagement of the engaging pawl with the engaging groove is released and the unlocked state is established. You can become
　この発明により、前記回転入力体と前記ナットリングの差動回転により、少なくとも回転入力体に設けられた案内溝に対して付勢部によって押付けられる被案内部が、溝深さが深い深溝部に案内されることで前記係止爪が前記係止溝に係止してロック状態となり、溝深さが浅い浅溝部に前記被案内部に案内されると、前記係止溝への前記係止爪の係止が解除してロック解除状態となることができる。 According to the present invention, the differential rotation of the rotary input body and the nut ring causes at least the guided portion pressed against the guide groove provided in the rotary input body by the urging portion to become a deep groove portion with a deep groove depth. By being guided, the locking pawl is locked in the locking groove to be in a locked state, and when guided by the guided portion in the shallow groove portion with a shallow groove depth, the locking in the locking groove is achieved. The latching of the pawl can be released to enter the unlocked state.
　またこの発明の態様として、前記被案内部は、前記案内溝に向かって凸状となる円弧形状であるとともに、前記深溝部と前記浅溝部とが周方向に所定間隔を隔てて配置され、前記被案内部が前記深溝部と前記浅溝部との間に当接する状態において、前記付勢部の付勢力によって、前記被案内部が前記深溝部か前記浅溝部のいずれかに案内されてもよい。 Further, as an aspect of the present invention, the guided portion has an arc shape that protrudes toward the guide groove, and the deep groove portion and the shallow groove portion are arranged with a predetermined interval in the circumferential direction, In a state in which the guided portion abuts between the deep groove portion and the shallow groove portion, the guided portion may be guided to either the deep groove portion or the shallow groove portion by the biasing force of the biasing portion. .
　この発明により、前記被案内部が前記深溝部と前記浅溝部との間に当接する状態から、前記付勢部の付勢力によって、自動的に、前記被案内部が前記深溝部か前記浅溝部のいずれかに案内されることができる。 According to the present invention, from the state in which the guided portion abuts between the deep groove portion and the shallow groove portion, the guided portion is automatically moved from the deep groove portion to the shallow groove portion by the biasing force of the biasing portion. You can be guided to either
　またこの発明の態様として、前記案内溝を第１案内溝、前記被案内部を第１被案内部、前記付勢部を第１付勢部とし、前記回転入力体に第２案内溝が設けられるとともに、前記第２案内溝に案内される第２被案内部と、前記第２被案内部を前記第２案内溝に押付ける第２付勢部とが前記ナットリングに取付けられ、前記第２案内溝による前記第２被案内部の案内に伴って前記回転入力体が前記ナットリングに対して差動回転してもよい。 Further, as a mode of the present invention, the guide groove is a first guide groove, the guided portion is a first guided portion, the urging portion is a first urging portion, and the rotational input body is provided with a second guide groove. A second guided portion guided by the second guide groove and a second biasing portion for pressing the second guided portion against the second guide groove are attached to the nut ring. The rotational input body may be differentially rotated with respect to the nut ring as the second guided portion is guided by the two guide grooves.
　この発明により、ナットリングと前記回転入力体とがいずれの相対回転位置であっても、前記第２案内溝に前記第２被案内部が案内され、前記回転入力体が前記ナットリングに対して差動回転して、確実に、ロック状態とすることができる。 According to this aspect of the invention, the second guided portion is guided by the second guide groove, and the rotational input body moves relative to the nut ring regardless of the relative rotational positions of the nut ring and the rotational input body. Differential rotation can be performed to ensure a locked state.
　詳述すると、回転入力体を締付け方向に回転入力し、軸孔に挿入された回転治具の基軸をチャック爪で把持した状態において、前記第１被案内部が前記第１案内溝に案内されて、前記係止爪が前記係止溝に係止してロック状態となるが、締付け状態における前記ナットリングと前記回転入力体との相対回転位置によっては前記第１被案内部が前記第１案内溝に案内されきらず、ロック状態にならず、スリーブに不自然なガタツキが生じる場合であっても、前記第２案内溝に前記第２被案内部が案内されることで、前記回転入力体が前記ナットリングに対して差動回転して、確実に、不自然なガタツキを防止することができる。 More specifically, in a state in which the rotary input body is rotated in the tightening direction and the base shaft of the rotary jig inserted into the shaft hole is gripped by the chuck claws, the first guided portion is guided by the first guide groove. As a result, the engaging pawl is engaged with the engaging groove to be locked, but depending on the relative rotational position between the nut ring and the rotary input body in the tightened state, the first guided portion may move to the first position. Even if the sleeve is not completely guided by the guide groove and does not enter a locked state, and unnatural rattling occurs in the sleeve, the second guided portion is guided by the second guide groove, so that the rotation input body can be rotated. rotates differentially with respect to the nut ring to reliably prevent unnatural backlash.
　つまり、前記回転入力体に設けられた前記第２案内溝に、前記ナットリングに取付けられた前記第２被案内溝が案内されることで、前記ナットリングに対する前記回転入力体の相対回転位置を位置決めして、確実に、不自然なガタツキを防止することができる。 That is, the second guided groove attached to the nut ring is guided by the second guide groove provided in the rotary input body, thereby adjusting the relative rotational position of the rotary input body with respect to the nut ring. By positioning, it is possible to reliably prevent unnatural rattling.
　またこの発明の態様として、前記第２案内溝は、溝深さが深い深溝部と、溝深さが浅い浅溝部とを有するとともに、前記第２被案内部は、前記案内溝に向かって凸状となる円弧形状に形成され、前記第２案内溝における前記浅溝部にある前記第２被案内部は、第２付勢部の付勢力によって前記深溝部に案内され、前記第２案内溝にける前記浅溝部から前記深溝部への案内に伴って前記回転入力体が前記ナットリングに対して差動回転してもよい。 Further, as an aspect of the present invention, the second guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth, and the second guided portion protrudes toward the guide groove. The second guided portion in the shallow groove portion of the second guide groove is guided to the deep groove portion by the biasing force of the second biasing portion, and is guided to the second guide groove by the biasing force of the second biasing portion. The rotational input body may be differentially rotated with respect to the nut ring as it is guided from the shallow groove portion to the deep groove portion.
　この発明により、前記第１被案内部が前記第１案内溝に案内されきらない前記ナットリングと前記回転入力体との相対回転位置において円弧形状に形成された前記第２被案内部を前記第２案内溝の前記浅溝部から前記深溝部に案内して、前記回転入力体を前記ナットリングに対して差動回転させて、確実に、不自然なガタツキを防止することができる。 According to the present invention, the second guided portion formed in an arc shape is replaced with the second guided portion at the relative rotational position between the nut ring and the rotary input body where the first guided portion is not completely guided by the first guide groove. Unnatural backlash can be reliably prevented by guiding the rotary input member from the shallow groove portion to the deep groove portion of the guide groove 2 and differentially rotating the rotary input body with respect to the nut ring.
　またこの発明の態様として、前記第２付勢部は、ねじりバネで構成されてもよい。　
　上記ねじりバネとはトーションばねともいう。 Moreover, as an aspect of the present invention, the second biasing portion may be composed of a torsion spring.
The torsion spring is also called a torsion spring.
　この発明により、コンパクトな前記第２付勢部であっても強い付勢力を発揮することができる。したがって、前記第２案内溝に対して前記第２被案内部を強い付勢力で付勢して、前記第２被案内部を前記第２案内溝で確実に案内することができる。 According to this invention, even the compact second urging portion can exert a strong urging force. Therefore, the second guided portion can be urged with a strong urging force against the second guide groove, and the second guided portion can be reliably guided by the second guide groove.
　またこの発明の態様として、前記ナットリングに、前記ねじりバネで構成された前記第２付勢部が変形できる変形空間が設けられてもよい。　
　この発明により、前記第２付勢部が強い付勢力を発揮するためのねじり変形ができる。したがって、前記第２案内溝に対して前記第２被案内部を強い付勢力で付勢して、前記第２被案内部を前記第２案内溝で確実に案内することができる。 Further, as an aspect of the present invention, the nut ring may be provided with a deformation space in which the second biasing portion formed by the torsion spring can be deformed.
According to this invention, the second biasing portion can be torsionally deformed to exert a strong biasing force. Therefore, the second guided portion can be urged with a strong urging force against the second guide groove, and the second guided portion can be reliably guided by the second guide groove.
　この発明によれば、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることのない締付けを実現できるチャック装置及び電動工具を提供することができる。 According to the present invention, it is possible to provide a chuck device and an electric tool that can achieve tightening that prevents the locked state from being unintentionally released or that the locked state cannot be released.
チャック装置を備えた電動工具の正面図。1 is a front view of a power tool equipped with a chuck device; FIG. チャック装置の各構成要素の基端側からの分解斜視図。FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side; チャック装置の各構成要素の先端側からの分解斜視図。FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side; チャック装置の縦断面図。FIG. 2 is a longitudinal sectional view of the chuck device; インナースリーブの説明図。Explanatory drawing of an inner sleeve. ナットリングとスプリングリングの説明図。Explanatory drawing of a nut ring and a spring ring. ロックリングとアウターリングの説明図。Explanatory drawing of a lock ring and an outer ring. ロックベアリングの説明図。Explanatory drawing of a lock bearing. ロック・解除機構の説明図。Explanatory drawing of a lock/release mechanism. 両方向ロック状態のロック・解除機構の説明図。Explanatory drawing of the locking/unlocking mechanism in a bidirectionally locked state. 両方向ロック状態のロック・解除機構の説明図。Explanatory drawing of the locking/unlocking mechanism in a bidirectionally locked state. 両方向ロック状態のロック・解除機構の説明図。Explanatory drawing of the locking/unlocking mechanism in a bidirectionally locked state. 締付け状態のロック・解除機構の説明図。Explanatory drawing of the lock/release mechanism in the tightened state. 開放状態のロック・解除機構の説明図。Explanatory drawing of the lock/release mechanism in the open state. 別の実施形態のチャック装置の各構成要素の基端側からの分解斜視図。FIG. 11 is an exploded perspective view of each component of a chuck device of another embodiment from the base end side; 別の実施形態のチャック装置の各構成要素の先端側からの分解斜視図。FIG. 11 is an exploded perspective view of each component of a chuck device of another embodiment, viewed from the distal end side; さらに別の実施形態のチャック装置のインナースリーブの説明図。Explanatory drawing of the inner sleeve of the chuck apparatus of further another embodiment. さらに別の実施形態のチャック装置の両方向ロック状態のロック・解除機構の説明図。FIG. 11 is an explanatory diagram of a locking/unlocking mechanism in a bidirectionally locked state of a chuck device according to still another embodiment; さらに別の実施形態のチャック装置の締付け状態のロック・解除機構の説明図。FIG. 4 is an explanatory diagram of a locking/unlocking mechanism in a tightened state of a chuck device according to still another embodiment; さらに別の実施形態のチャック装置の開放状態のロック・解除機構の説明図。FIG. 11 is an explanatory diagram of a lock/release mechanism in an open state of a chuck device according to still another embodiment; さらまた別の実施形態のアウターリング及びロックリングの説明図。Explanatory drawing of the outer ring and lock ring of still another embodiment. チャック装置を備えた電動工具の正面図。1 is a front view of a power tool equipped with a chuck device; FIG. チャック装置の各構成要素の基端側からの分解斜視図。FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side; チャック装置の各構成要素の先端側からの分解斜視図。FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side; チャック装置の縦断面図。FIG. 2 is a longitudinal sectional view of the chuck device; ナットリング及びスプリングリングの説明図。Explanatory drawing of a nut ring and a spring ring. 組付け状態のナットリング及びスプリングリングの説明図。Explanatory drawing of the nut ring and spring ring of an assembly|attachment state. アウタースリーブと組付け状態のナットリング及びスプリングリングの説明図。Explanatory drawing of an outer sleeve, the nut ring of an assembly|attachment state, and a spring ring. 緩み状態のチャック装置の断面図による説明図。Explanatory drawing by sectional drawing of the chuck apparatus of a loose state. 締付け途中状態のチャック装置の断面図による説明図。Explanatory drawing by sectional drawing of the chuck device in the tightening halfway state. 締付け状態のチャック装置の断面図による説明図。Explanatory drawing by sectional drawing of the chuck apparatus of a tightening state. チャック装置の各構成要素の基端側からの分解斜視図。FIG. 2 is an exploded perspective view of each component of the chuck device from the base end side; チャック装置の各構成要素の先端側からの分解斜視図。FIG. 3 is an exploded perspective view of each component of the chuck device as viewed from the distal end side;
　この発明の一実施の形態を以下図面に基づいて詳述する。　
　図１はチャック装置１を備えた電動工具Ｋの正面図を示し、図２はチャック装置１の各構成要素の基端側Ｂからの分解斜視図を示し、図３はチャック装置１の各構成要素の先端側Ｆからの分解斜視図を示し、図４はチャック装置１の縦断面図を示している。 One embodiment of the present invention will be described in detail below with reference to the drawings.
1 shows a front view of an electric power tool K equipped with a chuck device 1, FIG. 2 shows an exploded perspective view of each component of the chuck device 1 from the base end side B, and FIG. 3 shows each component of the chuck device 1. An exploded perspective view from the tip end side F of the element is shown, and FIG. 4 shows a longitudinal sectional view of the chuck device 1. FIG.
　図５はインナースリーブ２３の説明図を示し、図６はナットリング２２とスプリングリング３４の説明図を示し、図７はロックリング３２とアウターリング３１の説明図を示し、図８はロックベアリング３０の説明図を示している。 5 shows an explanatory diagram of the inner sleeve 23, FIG. 6 shows an explanatory diagram of the nut ring 22 and the spring ring 34, FIG. 7 shows an explanatory diagram of the lock ring 32 and the outer ring 31, and FIG. is an explanatory diagram of.
　詳述すると、図５（ａ）は基端側Ｂからのインナースリーブ２３の斜視図を示し、図５（ｂ）はインナースリーブ２３の背面図を示している。なお、図５（ａ）において、インナースリーブ２３の基端側Ｂの一部を透過状態で図示している。　
　図６（ａ）は先端側Ｆからのナットリング２２及びスプリングリング３４の斜視図を示し、図６（ｂ）はナットリング２２の正面図を示し、図６（ｃ）はスプリングリング３４の正面図を示している。 Specifically, FIG. 5(a) shows a perspective view of the inner sleeve 23 from the base end side B, and FIG. 5(b) shows a rear view of the inner sleeve 23. As shown in FIG. In addition, in FIG. 5A, a portion of the base end side B of the inner sleeve 23 is shown in a see-through state.
6(a) shows a perspective view of the nut ring 22 and the spring ring 34 from the tip side F, FIG. 6(b) shows a front view of the nut ring 22, and FIG. 6(c) shows a front view of the spring ring 34. Figure shows.
　図７（ａ）は基端側Ｂからのロックリング３２及びアウターリング３１の斜視図を示し、図７（ｂ）は先端側Ｆからのロックリング３２及びアウターリング３１の斜視図を示し、図７（ｃ）はアウターリング３１の正面図を示し、図７（ｄ）はロックリング３２の背面図を示している。　
　図８（ａ）は非噛合状態のロックベアリング３０の断面図を示し、図８（ｂ）は噛合状態のロックベアリング３０の断面図を示している。 7(a) shows a perspective view of the lock ring 32 and the outer ring 31 from the base end side B, and FIG. 7(b) shows a perspective view of the lock ring 32 and the outer ring 31 from the distal end side F. FIG. 7(c) shows a front view of the outer ring 31, and FIG. 7(d) shows a rear view of the lock ring 32. As shown in FIG.
FIG. 8(a) shows a sectional view of the lock bearing 30 in the non-engaged state, and FIG. 8(b) shows a sectional view of the lock bearing 30 in the engaged state.
　また、図９はロック・解除機構２０の説明図を示し、図１０乃至図１２は両方向ロック状態のロック・解除機構２０の説明図を示し、図１３は締付け状態のロック・解除機構２０の説明図を示し、図１４はロック解除状態のロック・解除機構２０の説明図を示している。 9 shows an explanatory diagram of the locking/unlocking mechanism 20, FIGS. 10 to 12 show explanatory diagrams of the locking/unlocking mechanism 20 in a two-way locked state, and FIG. 14 shows an explanatory view of the lock/release mechanism 20 in the unlocked state.
　詳しくは、図９（ａ），（ｂ）は先端側Ｆからのロック・解除機構２０の一部断面斜視図を示しているが、図９（ｂ）はロック・解除機構２０のうちインナースリーブ２３のみを断面斜視図とし、その他は斜視図を示している。 Specifically, FIGS. 9(a) and (b) show partial cross-sectional perspective views of the lock/release mechanism 20 from the distal end side F, and FIG. 9(b) shows the inner sleeve of the lock/release mechanism 20. Only 23 is a cross-sectional perspective view, and the others are perspective views.
　図１０（ａ）はロック・解除機構２０の側面図を示し、図１０（ｂ）は両方向ロック状態のロック・解除機構２０の図１０（ａ）におけるＡ－Ａ矢視断面図を示している。　
　図１１（ａ）はロック・解除機構２０の側面図を示し、図１１（ｂ）は両方向ロック状態のロック・解除機構２０の図１１（ａ）におけるＢ－Ｂ矢視断面図を示している。　
　図１２（ａ）はロック・解除機構２０の側面図を示し、図１２（ｂ）は両方向ロック状態のロック・解除機構２０の図１２（ａ）におけるＣ－Ｃ矢視断面図を示している。 FIG. 10(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 10(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line AA in FIG. 10(a). .
FIG. 11(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 11(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line BB in FIG. 11(a). .
FIG. 12(a) shows a side view of the locking/unlocking mechanism 20, and FIG. 12(b) shows a cross-sectional view of the locking/unlocking mechanism 20 in a bidirectional locked state taken along line CC in FIG. 12(a). .
　図１３（ａ）は締付け状態のロック・解除機構２０の図１１（ａ）におけるＢ－Ｂ矢視断面図を示し、図１３（ｂ）は締付け状態のロック・解除機構２０の図１０（ａ）におけるＡ－Ａ矢視断面図を示し、図１３（ｃ）は締付け状態のロック・解除機構２０の図１２（ａ）におけるＣ－Ｃ矢視断面図を示している。 FIG. 13(a) shows a cross-sectional view of the locking/unlocking mechanism 20 in the tightened state taken along line BB in FIG. 11(a), and FIG. ), and FIG. 13(c) shows a cross-sectional view of the locking/unlocking mechanism 20 in the tightened state, taken along line CC in FIG. 12(a).
　図１４（ａ）はロック解除状態のロック・解除機構２０の図１１（ａ）におけるＢ－Ｂ矢視断面図を示し、図１４（ｂ）はロック解除状態のロック・解除機構２０の図１０（ａ）におけるＡ－Ａ矢視断面図を示し、図１４（ｃ）はロック解除状態のロック・解除機構２０の図１２（ａ）におけるＣ－Ｃ矢視断面図を示している。 FIG. 14(a) shows a cross-sectional view of the locking/unlocking mechanism 20 in the unlocked state taken along line BB in FIG. 11(a), and FIG. 14(b) shows the locking/unlocking mechanism 20 in the unlocked state shown in FIG. 14(a) is a sectional view taken along the line AA, and FIG. 14(c) is a sectional view taken along the line CC of FIG. 12(a) of the locking/unlocking mechanism 20 in the unlocked state.
　本発明のチャック装置１は、電動工具Ｋの先端に装備されるものである。例えば、この電動工具Ｋは、利用者が使用時に握るハンドル部２ａを備えたハウジング２、及び該ハウジング２の先端側Ｆに設けたスピンドル４を備えている。 The chuck device 1 of the present invention is installed at the tip of the power tool K. For example, this power tool K has a housing 2 with a handle portion 2a that a user grips when using, and a spindle 4 provided on the distal end side F of the housing 2. As shown in FIG.
　そして、チャック装置１はスピンドル４の先端に装着され、チャック装置１で回転治具５の基軸５ａを締付け固定するものである。なお、スピンドル４は、ハンドル部２ａに配置したトリガ６を操作することで、ハウジング内部に設置された、正逆転回転可能なモータＭの回転駆動力によって回転する構成である。 The chuck device 1 is attached to the tip of the spindle 4, and the chuck device 1 clamps and fixes the base shaft 5a of the rotary jig 5. The spindle 4 is configured to be rotated by the rotational driving force of a motor M installed inside the housing and capable of forward and reverse rotation by operating a trigger 6 arranged on the handle portion 2a.
　上述の電動工具Ｋに装備されるチャック装置１は、図２乃至図４に示すように、主要部品であるチャック機構１０に、ロックベアリング３０が組み付けられたロック・解除機構２０を組み付けて構成している。 As shown in FIGS. 2 to 4, the chuck device 1 installed in the electric power tool K described above is constructed by assembling a locking/unlocking mechanism 20 having a lock bearing 30 to a chuck mechanism 10 which is a main component. ing.
　チャック機構１０は、ボディ１１と、ジョー１２とで構成している。　
　ボディ１１は、基端側Ｂから、後胴部１１１、中胴部１１２、前胴部１１３とで構成し、中心に軸心方向Ｘの挿入孔１１４を有する略円筒形状に形成している。 The chuck mechanism 10 is composed of a body 11 and jaws 12 .
The body 11 is composed of a rear body portion 111, a middle body portion 112, and a front body portion 113 from the base end side B, and is formed in a substantially cylindrical shape having an insertion hole 114 in the axial direction X at the center.
　そして、ボディ１１における周方向の三ケ所に、フランジ部を有する中胴部１１２から前胴部１１３を介し、外周側から内周側に向かい、軸心方向Ｘに対して交叉する方向で挿入孔１１４に連通するジョー装着孔１１５を配置している。なお、３つのジョー装着孔１１５の径内側方向の延長線上の交点は軸心方向Ｘ上となるように形成している。 Insertion holes are provided at three locations in the circumferential direction of the body 11 in a direction intersecting the axial direction X from the outer peripheral side to the inner peripheral side through the middle body portion 112 having a flange portion and the front body portion 113 . A jaw mounting hole 115 communicating with 114 is provided. It should be noted that the three jaw mounting holes 115 are formed such that the intersections of extension lines in the radially inner direction are on the axial direction X. As shown in FIG.
　ジョー１２は、後述するナットリング２２の嵌合ネジ溝２２５と螺合するネジ溝１２１を基端側Ｂの外側面に有する略円柱状に形成している。さらに、ジョー１２の前側内側面は、略円柱状の軸心方向に対して交叉する方向で、軸心方向Ｘに対して略平行な押圧面１２２を形成し、該押圧面１２２の幅方向中央には、カーバイド製のチップ１２３を装備している。このような構成のジョー１２は、上述したように、軸心方向Ｘに対して周方向における三方向において、押圧面１２２が軸心方向Ｘに平行となる姿勢で配置される。 The jaw 12 is formed in a substantially columnar shape having a screw groove 121 on the outer surface of the base end side B to be screwed with a fitting screw groove 225 of the nut ring 22 to be described later. Further, the front inner side surface of the jaw 12 forms a pressing surface 122 that is substantially parallel to the axial direction X in a direction intersecting the axial direction of the substantially cylindrical shape. is equipped with a tip 123 made of carbide. The jaw 12 having such a configuration is arranged in such a posture that the pressing surface 122 is parallel to the axial direction X in three directions in the circumferential direction with respect to the axial direction X, as described above.
　上述のように構成したボディ１１のジョー装着孔１１５にジョー１２を挿入してチャック機構１０を構成する。このとき、ジョー１２は、ネジ溝１２１が径外側向きとなるように、ジョー装着孔１１５に挿入される。　
　ロックベアリング３０は、図２乃至５及び図８に示すように、軸心方向Ｘの基端側Ｂから順に、アウターリング３１、ロックリング３２、ボール３３、及びスプリングリング３４で構成している。 The chuck mechanism 10 is constructed by inserting the jaws 12 into the jaw mounting holes 115 of the body 11 constructed as described above. At this time, the jaw 12 is inserted into the jaw mounting hole 115 so that the screw groove 121 faces radially outward.
2 to 5 and 8, the lock bearing 30 includes an outer ring 31, a lock ring 32, balls 33, and a spring ring 34 in order from the base end side B in the axial direction X. As shown in FIGS.
　アウターリング３１は、正面視中央に、中胴部１１２の挿通を許容する中央開口３１１を有し、ロックベアリング３０における基端側Ｂ（軸心方向Ｘにおける基端側Ｂ）の後方面を構成する後方リング面３１２と、後方リング面３１２の外周縁から先端側Ｆに突出する外周側面３１３とで構成している。なお、後方リング面３１２と外周側面３１３とで構成する角部は、ボール３３に対応する曲面で構成している。　
　また、外周側面３１３の内周面の先端側Ｆには、後述するスプリングリング３４のスプリングアーム３４６のラチェット爪３４８と噛合するラチェットギア３１４を周方向に配置している。 The outer ring 31 has a central opening 311 at the center in a front view, through which the middle body portion 112 is inserted, and constitutes the rear surface of the lock bearing 30 on the proximal side B (the proximal side B in the axial direction X). and an outer peripheral side surface 313 protruding from the outer peripheral edge of the rear ring face 312 to the front end side F. A corner formed by the rear ring surface 312 and the outer peripheral side surface 313 is formed with a curved surface corresponding to the ball 33 .
A ratchet gear 314 that meshes with a ratchet pawl 348 of a spring arm 346 of a spring ring 34 (to be described later) is arranged on the tip side F of the inner peripheral surface of the outer peripheral side surface 313 in the circumferential direction.
　ラチェット爪３４８が係止するラチェットギア３１４は、図７（ｃ）のａ部拡大図に示すように、周方向における締付け方向（先端側Ｆから視て時計回り方向、以下において時計回り方向Ｒという）と緩み方向（先端側Ｆから視て反時計回り方向、以下において反時計回り方向Ｌという）との両方向から係止可能な形状で形成している。　
　さらに、後方リング面３１２の先端側Ｆには、後述するロックリング３２の噛合ギア３２４と軸心方向Ｘに噛合する噛合溝３１５を有している。 The ratchet gear 314 to which the ratchet pawl 348 engages is, as shown in the enlarged view of part a in FIG. ) and loosening direction (counterclockwise direction when viewed from the distal end side F, hereinafter referred to as counterclockwise direction L).
Furthermore, the front end side F of the rear ring surface 312 has a meshing groove 315 that meshes in the axial direction X with a meshing gear 324 of the lock ring 32 to be described later.
　ロックリング３２は、正面視中央に、中胴部１１２の挿通を許容する中央開口３２１を有するリング本体３２２で構成され、中央開口３１１を形成するリング本体３２２の内周縁には、中央開口３２１に向かって正面視半円状に突出する回転固定タブ３２３を備えている。回転固定タブ３２３は、ボディ１１の中胴部１１２に装着された際に、ボディ１１の中胴部１１２におけるフランジ部の先端側Ｆに形成された固定凹部１１２ａに嵌合して、ボディ１１に対して回転固定するため、周方向に等間隔を隔てて三ケ所に配置している。 The lock ring 32 is composed of a ring body 322 having a central opening 321 through which the middle body portion 112 is inserted in the center in a front view. A rotation fixing tab 323 projecting in a semicircular shape when viewed from the front is provided. When the rotation fixing tab 323 is attached to the middle body portion 112 of the body 11 , the rotation fixing tab 323 is fitted into a fixing concave portion 112 a formed in the front end side F of the flange portion of the middle body portion 112 of the body 11 , and attached to the body 11 . In order to rotate and fix them, they are arranged at three locations at equal intervals in the circumferential direction.
　リング本体３２２の基端側Ｂの面には、上述のアウターリング３１における後方リング面３１２の噛合溝３１５と噛合する噛合ギア３２４が設けられている。　
　リング本体３２２は、先端側Ｆよりも径方向に長い略矩形断面であるが、図８（ａ）に示すように、径外側が径内側より先端側Ｆとなるように断面が傾斜している。本実施形態では、ロックリング３２は、軸心方向Ｘに直交する方向に対して、先端側Ｆに７°程度傾斜させている。 A meshing gear 324 that meshes with the meshing groove 315 of the rear ring surface 312 of the outer ring 31 is provided on the surface of the base end side B of the ring body 322 .
The ring body 322 has a substantially rectangular cross section that is longer in the radial direction than the distal end side F, but as shown in FIG. . In this embodiment, the lock ring 32 is inclined about 7 degrees toward the front end side F with respect to the direction perpendicular to the axial direction X. As shown in FIG.
　なお、ロックリング３２は、基端側Ｂに向かう押圧力によって、径外側が径内側より先端側Ｆとなる断面が、図８（ｂ）に示すように、軸心方向Ｘに対して直交する方向にフラットとなり、先端側Ｆに向かう付勢力が発生する皿ばねを構成している。 The cross section of the lock ring 32, in which the radially outer side becomes the distal side F from the radially inner side due to the pressing force toward the proximal end side B, is perpendicular to the axial direction X as shown in FIG. 8(b). It forms a disc spring that is flat in the direction and generates an urging force toward the tip side F.
　ボール３３は、鋼製の球体であり、軸心方向Ｘを中心として、周方向に複数配置している。　
　なお、ボール３３は、所定の強度や耐摩耗性等の所要性状を満足すれば、鋼球でなくとも、樹脂製であってもよいし、周方向に転動できれば、円柱状で形成されてもよい。 The balls 33 are spherical bodies made of steel, and a plurality of balls 33 are arranged in the circumferential direction with the axial direction X as the center.
The ball 33 may be made of resin instead of a steel ball as long as it satisfies required properties such as predetermined strength and wear resistance. good too.
　スプリングリング３４は、正面視中央に、中胴部１１２の挿通を許容する中央開口３４１を有し、前方リング面３４２と、前方リング面３４２の内周縁から内方に向かって湾曲するとともに基端側Ｂに突出する内周面３４３とで構成している。 The spring ring 34 has a central opening 341 at the center in a front view, through which the middle body portion 112 can be inserted, and has a front ring surface 342 and an inner peripheral edge of the front ring surface 342 that curves inward and extends toward the proximal end. and an inner peripheral surface 343 protruding to the side B.
　また、前方リング面３４２には、外周縁から先端側Ｆに向かって突出する前方突出部３４４が、周方向において等間隔を隔てて三箇所設けられている。　
　なお、内方に向かって湾曲するとともに基端側Ｂに突出する内周面３４３は、後述するボール３３に対応する曲面で構成している。 Further, the front ring surface 342 is provided with three front protrusions 344 protruding from the outer peripheral edge toward the front end side F at equal intervals in the circumferential direction.
The inner peripheral surface 343 that curves inward and protrudes toward the base end side B is configured with a curved surface corresponding to the ball 33 described later.
　前方突出部３４４は、後述するナットリング２２と嵌合するとともに、ラチェットギア３１４と噛合してラチェット機構を構成するためのものであり、前方リング面３４２の外周縁から先端側Ｆに向かって突出する連結片３４５と、連結片３４５から周方向の両側に延びるスプリングアーム３４６とを備えている。 The forward protruding portion 344 is to be fitted with a nut ring 22, which will be described later, and mesh with a ratchet gear 314 to form a ratchet mechanism, and protrudes from the outer peripheral edge of the front ring surface 342 toward the distal end side F. and a spring arm 346 extending from the connecting piece 345 to both sides in the circumferential direction.
　スプリングアーム３４６の周方向の先端には、後述するインナースリーブ２３の案内溝２３２に嵌り込む半円タブ３４７と、アウターリング３１のラチェットギア３１４に係止するラチェット爪３４８が設けられている。　
　半円タブ３４７はスプリングアーム３４６の先端を板厚方向に湾曲させ、先端側Ｆから視て、径外側が凸となる略半円状に形成している。 A semi-circular tab 347 that fits into a guide groove 232 of the inner sleeve 23 (to be described later) and a ratchet pawl 348 that engages with the ratchet gear 314 of the outer ring 31 are provided at the distal end of the spring arm 346 in the circumferential direction.
The semicircular tab 347 is formed by bending the tip of the spring arm 346 in the plate thickness direction and forming a substantially semicircular shape with a convex radially outer side when viewed from the tip side F.
　ラチェット爪３４８は、半円タブ３４７の連結片３４５の根本付近に配置され、半円タブ３４７はラチェット爪３４８より先端側Ｆに配置されている。そのため、ラチェット爪３４８は、半円タブ３４７と前方リング面３４２との間に配置されることとなる。 The ratchet pawl 348 is arranged near the base of the connecting piece 345 of the semicircular tab 347 , and the semicircular tab 347 is arranged on the tip side F of the ratchet pawl 348 . As such, the ratchet pawl 348 is positioned between the semi-circular tab 347 and the forward ring surface 342 .
　上述のように、先端に半円タブ３４７及びラチェット爪３４８を有するスプリングアーム３４６は、連結片３４５の周方向の両側にそれぞれ設けられ、先端側Ｆから視て時計回り方向ＲをＲ側スプリングアーム３４６Ｒとし、反時計回り方向ＬをＬ側スプリングアーム３４６Ｌとしている。 As described above, the spring arms 346 having the semicircular tabs 347 and the ratchet pawls 348 at their ends are provided on both sides of the connecting piece 345 in the circumferential direction. 346R, and the counterclockwise direction L is the L side spring arm 346L.
　そして、Ｒ側スプリングアーム３４６Ｒの半円タブ３４７をＲ側半円タブ３４７Ｒとし、ラチェット爪３４８をＲ側ラチェット爪３４８Ｒとしている。　
　また、Ｌ側スプリングアーム３４６Ｌの半円タブ３４７をＬ側半円タブ３４７Ｌとし、ラチェット爪３４８をＬ側ラチェット爪３４８Ｌとしている。 The semi-circular tab 347 of the R-side spring arm 346R is the R-side semi-circular tab 347R, and the ratchet pawl 348 is the R-side ratchet pawl 348R.
Also, the semicircular tab 347 of the L-side spring arm 346L is an L-side semicircular tab 347L, and the ratchet pawl 348 is an L-side ratchet pawl 348L.
　上述のように構成したアウターリング３１、ロックリング３２、ボール３３及びスプリングリング３４とを組み付けてロックベアリング３０を構成している。　
　具体的には、アウターリング３１の後方リング面３１２の先端側Ｆの面に形成した噛合溝３１５と、ロックリング３２のリング本体３２２の基端側Ｂの面に形成した噛合ギア３２４とが対向するように、外周側面３１３の径内側にロックリング３２を配置する。 The outer ring 31 , the lock ring 32 , the balls 33 and the spring ring 34 configured as described above are assembled to form the lock bearing 30 .
Specifically, the meshing groove 315 formed on the front end side F surface of the rear ring surface 312 of the outer ring 31 and the meshing gear 324 formed on the base end side B surface of the ring main body 322 of the lock ring 32 face each other. The lock ring 32 is arranged radially inward of the outer peripheral side surface 313 so as to do so.
　そして、ロックリング３２の先端側Ｆに複数のボール３３を配置し、その先端側Ｆからスプリングリング３４を組み付ける。　
　詳しくは、ロックリング３２の先端側Ｆに配置された複数のボール３３の径内側及び先端側Ｆを内周面３４３が跨ぐようにスプリングリング３４を配置する。このとき、連結片３４５のスプリングアーム３４６の先端に設けたラチェット爪３４８が、アウターリング３１の外周側面３１３の内面に形成したラチェットギア３１４とが係止するように組み付けてロックベアリング３０の組み付けは完了する。 A plurality of balls 33 are arranged on the tip side F of the lock ring 32, and the spring ring 34 is assembled from the tip side F thereof.
Specifically, the spring ring 34 is arranged so that the inner peripheral surface 343 straddles the radially inner side and the tip side F of the plurality of balls 33 arranged on the tip side F of the lock ring 32 . At this time, the lock bearing 30 is assembled so that the ratchet pawl 348 provided at the tip of the spring arm 346 of the connecting piece 345 engages with the ratchet gear 314 formed on the inner surface of the outer peripheral side surface 313 of the outer ring 31. complete.
　なお、このように組み付けられたロックベアリング３０は、ラチェット爪３４８がともにラチェットギア３１４に係止すると、アウターリング３１に対してスプリングリング３４は時計回り方向Ｒにも反時計回り方向Ｌにも相対回転できず、ラチェットギア３１４へのラチェット爪３４８の係止が解消すると、ボール３３によってアウターリング３１に対してスプリングリング３４は時計回り方向Ｒにも反時計回り方向Ｌにもスムーズに相対回転することができる。 In addition, in the lock bearing 30 assembled in this way, when both the ratchet pawl 348 is engaged with the ratchet gear 314, the spring ring 34 is relative to the outer ring 31 in both the clockwise direction R and the counterclockwise direction L. When the latching of the ratchet pawl 348 to the ratchet gear 314 is released, the spring ring 34 smoothly rotates relative to the outer ring 31 in the clockwise direction R and the counterclockwise direction L by the balls 33. be able to.
　そして、ロックベアリング３０は、Ｌ側ラチェット爪３４８Ｌはラチェットギア３１４に係止しないが、Ｒ側ラチェット爪３４８Ｒがラチェットギア３１４に係止すると、アウターリング３１に対してスプリングリング３４は時計回り方向Ｒには相対回転できず、反時計回り方向Ｌにはスムーズに相対回転することができる。 In the lock bearing 30, the L-side ratchet pawl 348L does not engage with the ratchet gear 314, but when the R-side ratchet pawl 348R engages with the ratchet gear 314, the spring ring 34 rotates in the clockwise direction R with respect to the outer ring 31. can rotate smoothly in the counterclockwise direction L.
　逆に、ロックベアリング３０は、Ｒ側ラチェット爪３４８Ｒはラチェットギア３１４に係止しないが、Ｌ側ラチェット爪３４８Ｌがラチェットギア３１４に係止すると、アウターリング３１に対してスプリングリング３４は反時計回り方向Ｌには相対回転できず、時計回り方向Ｒにはスムーズに相対回転することができる。 Conversely, in the lock bearing 30, the R side ratchet pawl 348R does not engage with the ratchet gear 314, but when the L side ratchet pawl 348L engages with the ratchet gear 314, the spring ring 34 rotates counterclockwise with respect to the outer ring 31. Relative rotation in the direction L is not possible, but relative rotation in the clockwise direction R can be performed smoothly.
　ロック・解除機構２０は、バックスリーブ２１、ナットリング２２、インナースリーブ２３、アウタースリーブ２４、ノーズピース２５、及び上述のロックベアリング３０で構成されている。　
　さらに詳しくは、ロック・解除機構２０は、図２乃至図４において、上述のロックベアリング３０と、ロックベアリング３０より軸心方向Ｘの基端側Ｂに図示するバックスリーブ２１と、ロックベアリング３０より軸心方向Ｘの先端側Ｆに図示するナットリング２２、インナースリーブ２３、アウタースリーブ２４、及びノーズピース２５とで構成している。 The lock/release mechanism 20 is composed of a back sleeve 21, a nut ring 22, an inner sleeve 23, an outer sleeve 24, a nose piece 25, and the lock bearing 30 described above.
2 to 4, the lock/release mechanism 20 includes the lock bearing 30 described above, a back sleeve 21 shown on the base end side B in the axial direction X from the lock bearing 30, and a back sleeve 21 from the lock bearing 30. It is composed of a nut ring 22, an inner sleeve 23, an outer sleeve 24, and a nose piece 25 shown in the figure on the distal end side F in the axial direction X. As shown in FIG.
　バックスリーブ２１は、チャック装置１の背面を構成し、ボディ１１の後胴部１１１の挿入を許容する円形開口２１１を有するリング本体２１２と、円形開口２１１を形成するリング本体２１２の内周縁において軸心方向Ｘの先端側Ｆに突出する内側円筒部２１３と、リング本体２１２の外周縁において軸心方向Ｘの先端側Ｆに突出する外側円筒部２１４とで構成している。 The back sleeve 21 constitutes the back surface of the chuck device 1 and includes a ring body 212 having a circular opening 211 for allowing the insertion of the rear body portion 111 of the body 11 and an inner peripheral edge of the ring body 212 forming the circular opening 211. It is composed of an inner cylindrical portion 213 protruding to the tip side F in the axial direction X and an outer cylindrical portion 214 protruding to the tip side F in the axial direction X at the outer peripheral edge of the ring body 212 .
　内側円筒部２１３は、ボディ１１の後胴部１１１に圧入可能な内径で形成するとともに、外側円筒部２１４より倍程度の高さで形成している。　
　内側円筒部２１３より半分程度の高さで形成した外側円筒部２１４の軸心方向Ｘの先端側Ｆの端部は、外径側が階段状となるように縮径された縮径端部２１４ａを構成している。 The inner cylindrical portion 213 is formed with an inner diameter that allows it to be press-fitted into the rear body portion 111 of the body 11 , and is formed with a height about twice that of the outer cylindrical portion 214 .
The end of the outer cylindrical portion 214, which is formed to be about half the height of the inner cylindrical portion 213, has a diameter-reduced end portion 214a whose diameter is reduced in a stepped manner on the outer diameter side. Configure.
　ナットリング２２は、断面視、先端側Ｆに向かって縮径された円錐台状の円錐台状開口２２１を有するリング状であるリング本体２２２で構成し、リング本体２２２の先端側Ｆの面には、後述するインナースリーブ２３の差動凸部２３１が周方向に遊嵌できる凹状の差動凹部２２３を周方向に所定間隔を隔てて三ケ所形成している。　
　リング本体２２２の外周面には、上述のスプリングリング３４の前方突出部３４４の連結片３４５の嵌合を許容する連結凹部２２４を、前方突出部３４４に対応する箇所に三ケ所形成している。 The nut ring 22 is composed of a ring-shaped ring body 222 having a truncated cone-shaped opening 221 whose diameter is reduced toward the distal end side F when viewed in cross section. , three differential recesses 223 are formed at predetermined intervals in the circumferential direction so that differential protrusions 231 of the inner sleeve 23, which will be described later, can be loosely fitted in the circumferential direction.
Three connection recesses 224 are formed on the outer peripheral surface of the ring main body 222 at positions corresponding to the front projections 344 to allow the connection pieces 345 of the front projections 344 of the spring ring 34 to be fitted.
　また、円錐台状開口２２１を形成するリング本体２２２の内面には、ジョー１２のネジ溝１２１が噛合する螺旋状の嵌合ネジ溝２２５を形成している。なお、嵌合ネジ溝２２５は、上述したジョー１２のネジ溝１２１に対応した螺旋角度で形成するとともに、複数周分の螺旋長さで形成している。 Further, on the inner surface of the ring body 222 forming the truncated cone-shaped opening 221, a helical fitting screw groove 225 with which the screw groove 121 of the jaw 12 meshes is formed. The fitting thread groove 225 is formed at a spiral angle corresponding to the thread groove 121 of the jaw 12 described above, and is formed with a spiral length corresponding to a plurality of turns.
　上述のように構成されたナットリング２２は、図６（ａ）に示すように、上述のロックベアリング３０と組み付けられる。　
　詳しくは、ロックベアリング３０に組み付けられたスプリングリング３４の前方突出部３４４の連結片３４５が、先端側Ｆに配置されたナットリング２２の連結凹部２２４に挿入されて、スプリングリング３４とナットリング２２とが連結される。　
　このようにしてロックベアリング３０と組み付けられたナットリング２２は、スプリングリング３４と回転方向が固定される。 The nut ring 22 configured as described above is assembled with the lock bearing 30 described above, as shown in FIG. 6(a).
Specifically, the connecting piece 345 of the forward protruding portion 344 of the spring ring 34 assembled to the lock bearing 30 is inserted into the connecting recess 224 of the nut ring 22 arranged on the tip end side F so that the spring ring 34 and the nut ring 22 are connected. and are connected.
The nut ring 22 assembled with the lock bearing 30 in this manner is rotationally fixed with the spring ring 34 .
　インナースリーブ２３は、後述するアウタースリーブ２４に軸心方向Ｘの基端側Ｂより嵌め込んで内包される、アウタースリーブ２４よりひとまわり小さな側面視略釣鐘型の筒状である。　
　インナースリーブ２３は、図５に示すように、軸心方向Ｘの中央より先端側Ｆの内周側に、基端側Ｂに向かって突出し、ナットリング２２の先端側Ｆの面に形成した差動凹部２２３に遊嵌する差動凸部２３１を周方向に所定間隔を隔てて三ケ所形成している。 The inner sleeve 23 has a substantially bell-shaped tubular shape in a side view that is slightly smaller than the outer sleeve 24 and is fitted into the outer sleeve 24 to be described later from the base end side B in the axial direction X to be contained therein.
As shown in FIG. 5, the inner sleeve 23 protrudes from the center in the axial direction X to the inner peripheral side of the distal end side F toward the proximal end side B, and has a gap formed on the surface of the nut ring 22 on the distal end side F. Differential protrusions 231 that are loosely fitted in the dynamic recesses 223 are formed at three locations in the circumferential direction at predetermined intervals.
　また、差動凸部２３１より基端側Ｂの内周面には、上述の前方突出部３４４の半円タブ３４７が係止する案内溝２３２（２３２Ｒ，２３２Ｌ）を設けている。　
　案内溝２３２は、図５（ｂ）に示すように、Ｒ側スプリングアーム３４６ＲのＲ側半円タブ３４７Ｒが嵌合し、案内する時計回り方向Ｒに配置されたＲ側案内溝２３２Ｒと、Ｌ側スプリングアーム３４６ＬのＬ側半円タブ３４７Ｌが嵌合し、案内する反時計回り方向Ｌに配置されたＬ側案内溝２３２Ｌとを設けている。 Further, guide grooves 232 (232R, 232L) for locking the semicircular tabs 347 of the forward projecting portion 344 are provided on the inner peripheral surface on the base end side B from the differential convex portion 231 .
As shown in FIG. 5(b), the guide groove 232 includes an R-side guide groove 232R arranged in the clockwise direction R in which the R-side semicircular tab 347R of the R-side spring arm 346R is fitted and guided. An L-side guide groove 232L arranged in the counterclockwise direction L is provided to guide the L-side semicircular tab 347L of the side spring arm 346L.
　Ｒ側半円タブ３４７Ｒを案内する時計回り方向ＲのＲ側案内溝２３２Ｒは、Ｒ側案内溝２３２Ｒのうち反時計回り方向Ｌに配置され、係止したＲ側半円タブ３４７Ｒが径外側となる深溝部２３２Ｒａと、Ｒ側案内溝２３２Ｒのうち時計回り方向Ｒに配置され、係止するＲ側半円タブ３４７Ｒが径内側に付勢される浅溝部２３２Ｒｂと、深溝部２３２Ｒａにおける反時計回り方向Ｌに形成された面取溝部２３２Ｒｃと、深溝部２３２Ｒａと浅溝部２３２Ｒｂとの間において径内側に凸となる円弧状の凸溝部２３２Ｒｄとがある。　
　そして、Ｒ側案内溝２３２Ｒは、深溝部２３２Ｒａ，浅溝部２３２Ｒｂ、面取溝部２３２Ｒｃ及び凸溝部２３２Ｒｄで略フタコブ状に連続して一体化された溝形状で形成している。 The R-side guide groove 232R in the clockwise direction R that guides the R-side semicircular tab 347R is arranged in the counterclockwise direction L of the R-side guide groove 232R, and the locked R-side semicircular tab 347R is positioned radially outward. a shallow groove portion 232Rb arranged in the clockwise direction R in the R-side guide groove 232R and to which the R-side semicircular tab 347R to be locked is biased radially inward; There are a chamfered groove portion 232Rc formed in the direction L, and an arcuate convex groove portion 232Rd convex radially inward between the deep groove portion 232Ra and the shallow groove portion 232Rb.
The R-side guide groove 232R is formed in a groove shape in which the deep groove portion 232Ra, the shallow groove portion 232Rb, the chamfered groove portion 232Rc, and the convex groove portion 232Rd are continuously integrated in a substantially flat shape.
　Ｌ側半円タブ３４７Ｌを案内する反時計回り方向ＬのＬ側案内溝２３２Ｌは、Ｌ側案内溝２３２Ｌのうち時計回り方向Ｒに配置され、係止したＬ側半円タブ３４７Ｌが径内側に付勢される浅溝部２３２Ｌｂと、Ｌ側案内溝２３２Ｌのうち反時計回り方向Ｌに配置され、係止するＬ側半円タブ３４７Ｌが径外側となる深溝部２３２Ｌａとが略ヒトコブ状に連続して一体化された溝形状で形成している。 The L-side guide groove 232L in the counterclockwise direction L that guides the L-side semicircular tab 347L is arranged in the clockwise direction R in the L-side guide groove 232L, and the locked L-side semicircular tab 347L extends radially inward. The biased shallow groove portion 232Lb and the deep groove portion 232La arranged in the counterclockwise direction L in the L-side guide groove 232L and having the L-side semicircular tab 347L to be locked on the radially outer side are continuous in a substantially hump shape. It is formed in a groove shape that is integrated with each other.
　なお、係止した半円タブ３４７が径内側に付勢される浅溝部２３２Ｒｂ，２３２Ｌｂ及び面取溝部２３２Ｒｃは、組み付け状態において、係止した半円タブ３４７が径内側に付勢されることで、半円タブ３４７と並設されたラチェット爪３４８が、アウターリング３１のラチェットギア３１４から径内側に離間し、ラチェットギア３１４との噛合が解消される位置まで移動する深さで形成している。 The shallow groove portions 232Rb and 232Lb and the chamfered groove portion 232Rc to which the locked semicircular tab 347 is urged radially inwardly are urged radially inwardly in the assembled state. , the semicircular tab 347 and the ratchet pawl 348 arranged side by side are spaced radially inward from the ratchet gear 314 of the outer ring 31, and are formed to a depth that moves to a position where the engagement with the ratchet gear 314 is released. .
　また、深溝部２３２Ｌａと浅溝部２３２Ｌｂとの周方向の間隔、及び浅溝部２３２Ｒｂと面取溝部２３２Ｒｃとの周方向の間隔は、ナットリング２２の差動凹部２２３にインナースリーブ２３の差動凸部２３１が遊嵌する際の遊嵌量、つまり、ナットリング２２に対してインナースリーブ２３が周方向に差動回転する回転量に対応している。 The circumferential distance between the deep groove portion 232La and the shallow groove portion 232Lb and the circumferential distance between the shallow groove portion 232Rb and the chamfered groove portion 232Rc are the same as the differential concave portion 223 of the nut ring 22 and the differential convex portion of the inner sleeve 23. 231 is loosely fitted, that is, the rotation amount of the inner sleeve 23 differentially rotated in the circumferential direction with respect to the nut ring 22 .
　また、面取溝部２３２Ｒｃと深溝部２３２Ｌａとの周方向の間隔、及び浅溝部２３２Ｒｂと浅溝部２３２Ｌｂとの周方向の間隔は、前方突出部３４４に備えた時計回り方向ＲのＲ側半円タブ３４７Ｒと反時計回り方向ＬのＲ側半円タブ３４７Ｒとの周方向間隔に対応して形成している。 In addition, the circumferential distance between the chamfered groove portion 232Rc and the deep groove portion 232La and the circumferential distance between the shallow groove portion 232Rb and the shallow groove portion 232Lb are determined by the R-side semicircular tab in the clockwise direction R provided in the front projection portion 344. 347R and the R-side semicircular tab 347R in the counterclockwise L direction.
　したがって、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２３２Ｒの浅溝部２３２Ｒｂに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２３２Ｌの浅溝部２３２Ｌｂに係止することとなる。逆に、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２３２Ｒの面取溝部２３２Ｒｃに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２３２Ｌの深溝部２３２Ｌａに係止することとなる。 Therefore, when the R-side semi-circular tab 347R in the clockwise direction R is engaged with the shallow groove portion 232Rb of the R-side guide groove 232R, the L-side semi-circular tab 347L in the counter-clockwise direction L is not in the shallow position of the L-side guide groove 232L. It will be locked in the groove portion 232Lb. Conversely, when the R-side semicircular tab 347R in the clockwise direction R is engaged with the chamfered groove portion 232Rc of the R-side guide groove 232R, the L-side semicircular tab 347L in the counterclockwise direction L is locked to the deep groove portion 232La.
　なお、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２３２Ｒの深溝部２３２Ｒａに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２３２Ｌの深溝部２３２Ｌａと浅溝部２３２Ｌｂとの間に案内されることとなる。 Note that when the R-side semicircular tab 347R in the clockwise direction R is engaged with the deep groove portion 232Ra of the R-side guide groove 232R, the L-side semicircular tab 347L in the counterclockwise direction L is the deep groove of the L-side guide groove 232L. It is guided between the portion 232La and the shallow groove portion 232Lb.
　アウタースリーブ２４は、内部に軸心方向Ｘの基端側Ｂからのインナースリーブ２３の嵌め込みを許容する、インナースリーブ２３よりひとまわり大きく、後端側がバックスリーブ２１の外周側の外側円筒部２１４と同径であり、先端側に後述するノーズピース２５の挿着を許容する先端開口部２４１を有する先端側が絞られた側面視略釣鐘型の筒状に形成している。 The outer sleeve 24 is slightly larger than the inner sleeve 23 and allows the inner sleeve 23 to be fitted therein from the base end side B in the axial direction X. It has the same diameter and is formed in a substantially bell-shaped tubular shape in a side view with a narrowed tip end having a tip opening 241 for inserting a nosepiece 25 (described later) on the tip end side.
　以下の説明において、アウタースリーブ２４の内部にインナースリーブ２３が挿入されたものをスリーブ２３，２４として説明する。　
　なお、インナースリーブ２３とアウタースリーブ２４とは、上述のように別体構成したものを組み付けてもよいが、一体的に形成されていてもよい。 In the following description, the inner sleeve 23 inserted into the outer sleeve 24 will be referred to as sleeves 23 and 24 .
In addition, the inner sleeve 23 and the outer sleeve 24 may be assembled separately as described above, but may be integrally formed.
　ノーズピース２５は、正面視中央にジョー１２の挿通を許容する挿通孔２５１を有するとともに、先端側Ｆに向けて寝かせた略円錐台状のキャップ本体２５０と、キャップ本体２５０の背面側において基端側Ｂに突出する挿着部２５２とで構成している。挿着部２５２は、上述のアウタースリーブ２４の先端開口部２４１に挿着する中空の略円筒状である。 The nosepiece 25 has an insertion hole 251 at the center in front view for allowing the jaws 12 to pass therethrough. It is composed of an insertion part 252 protruding to the side B. The insertion portion 252 has a hollow, substantially cylindrical shape that is inserted into the tip opening 241 of the outer sleeve 24 described above.
　各要素をこのように構成したチャック装置１は、まずボディ１１の後胴部１１１を円形開口２１１に挿入するようにして、バックスリーブ２１を軸心方向Ｘの基端側Ｂからボディ１１に装着する。なお、内面を後胴部１１１の外面と略同径に形成した内側円筒部２１３を後胴部１１１に圧入して装着するため、バックスリーブ２１は、ボディ１１に対して軸心方向Ｘ及び回転方向ともに固定された状態で装着される。 In the chuck device 1 having each element configured as described above, the back sleeve 21 is attached to the body 11 from the base end side B in the axial direction X by first inserting the rear body portion 111 of the body 11 into the circular opening 211. do. In addition, since the inner cylindrical portion 213 having the inner surface formed to have substantially the same diameter as the outer surface of the rear body portion 111 is press-fitted into the rear body portion 111, the back sleeve 21 is rotated in the axial direction X and with respect to the body 11. It is mounted in a fixed state in both directions.
　ジョー装着孔１１５にジョー１２を挿入したボディ１１の先端側Ｆから、ナットリング２２を組み付けたロックベアリング３０を装着し、全部のジョー１２のネジ溝１２１と、上述のようにロックベアリング３０に組み付けたナットリング２２の嵌合ネジ溝２２５とを螺合させながら、ボディ１１に対してロックベアリング３０を装着する。このとき、ロックベアリング３０を構成するロックリング３２の回転固定タブ３２３は、中胴部１１２に形成した固定凹部１１２ａに係止するため、ロックリング３２は、ボディ１１に対して回転固定されている。 The lock bearing 30 with the nut ring 22 assembled is mounted from the front end side F of the body 11 where the jaw 12 is inserted into the jaw mounting hole 115, and the screw grooves 121 of all the jaws 12 and the lock bearing 30 are mounted as described above. The lock bearing 30 is attached to the body 11 while screwing it into the fitting screw groove 225 of the nut ring 22 . At this time, the rotation fixing tabs 323 of the lock ring 32 constituting the lock bearing 30 are engaged with the fixing recesses 112a formed in the middle body portion 112, so that the lock ring 32 is rotationally fixed with respect to the body 11. .
　さらに、インナースリーブ２３を内部に圧入して一体化したアウタースリーブ２４を、上述したようにナットリング２２を組み付けたロックベアリング３０を装着したボディ１１の先端側Ｆから挿入する。 Further, the outer sleeve 24 integrated by press-fitting the inner sleeve 23 inside is inserted from the front end side F of the body 11 on which the lock bearing 30 with the nut ring 22 assembled as described above is mounted.
　このとき、インナースリーブ２３の案内溝２３２にロックベアリング３０のスプリングリング３４の半円タブ３４７が係止するとともに、ナットリング２２の差動凹部２２３にインナースリーブ２３の差動凸部２３１が遊嵌するように挿着する。　
　さらに、アウターリング３１のラチェットギア３１４と、スプリングリング３４のラチェット爪３４８とが係止していてもよい。 At this time, the semicircular tab 347 of the spring ring 34 of the lock bearing 30 is engaged with the guide groove 232 of the inner sleeve 23, and the differential projection 231 of the inner sleeve 23 is loosely fitted into the differential recess 223 of the nut ring 22. Insert as shown.
Furthermore, the ratchet gear 314 of the outer ring 31 and the ratchet pawl 348 of the spring ring 34 may be engaged.
　さらにまた、ノーズピース２５の挿着部２５２をアウタースリーブ２４の先端開口部２４１から挿入して、チャック装置１の組み付けを完了する。　
　このとき、ノーズピース２５はボディ１１に対して軸心方向Ｘ及び回転方向に固定された状態で装着される。 Furthermore, the insertion portion 252 of the nosepiece 25 is inserted through the tip opening 241 of the outer sleeve 24 to complete the assembly of the chuck device 1 .
At this time, the nosepiece 25 is attached to the body 11 while being fixed in the axial direction X and the rotational direction.
　なお、このとき、図８（ａ）におけるａ部拡大図に示すようにロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５とは噛合していない。つまり、ボディ１１に対して回転固定されたロックリング３２とアウターリング３１は噛合していないため、アウターリング３１はボディ１１に対する回転が規制されていない状態（非噛合状態）となる。この状態はいわゆる通常状態となる。 At this time, the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 are not meshed as shown in the enlarged view of part a in FIG. 8(a). That is, since the lock ring 32 , which is rotationally fixed to the body 11 , and the outer ring 31 do not mesh with each other, the rotation of the outer ring 31 with respect to the body 11 is not restricted (non-engagement state). This state is a so-called normal state.
　このように、構成するとともに組み付けたチャック装置１は、ボディ１１の挿入孔１１４に、先端側Ｆから回転治具５の基軸５ａを挿入するとともに、スリーブ２３，２４を時計回り方向Ｒに回転する。これにより、スプリングアーム３４６の付勢力で半円タブ３４７が案内溝２３２に係止しているため、ナットリング２２が時計回り方向Ｒに回転する。 In the chuck device 1 constructed and assembled in this manner, the base shaft 5a of the rotary jig 5 is inserted into the insertion hole 114 of the body 11 from the distal end side F, and the sleeves 23 and 24 are rotated in the clockwise direction R. . As a result, the nut ring 22 rotates clockwise because the semicircular tab 347 is engaged with the guide groove 232 by the biasing force of the spring arm 346 .
　ナットリング２２が時計回り方向Ｒに回転すると、ナットリング２２の嵌合ネジ溝２２５にネジ溝１２１が螺合する３本のジョー１２は、同期しながら、ジョー装着孔１１５を傾斜方向に進行し、挿入孔１１４に挿入された回転治具５の基軸５ａを周方向における三方向から把持して固定することができる。 When the nut ring 22 rotates in the clockwise direction R, the three jaws 12 whose thread grooves 121 are screwed into the fitting thread grooves 225 of the nut ring 22 move in the inclined direction through the jaw mounting holes 115 while synchronizing. , the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 can be gripped and fixed from three directions in the circumferential direction.
　なお、このとき、ロック・解除機構２０は、前回の使用状態によって、図１０乃至図１２で図示する両方向ロック状態であるか、図１４に示すロック解除状態である。　
　詳述すると、図１０及び図１２で図示する両方向ロック状態であるロック・解除機構２０は、Ｒ側案内溝２３２Ｒに係止するＲ側半円タブ３４７Ｒは深溝部２３２Ｒａに位置し、Ｌ側案内溝２３２Ｌに係止するＬ側半円タブ３４７Ｌは深溝部２３２Ｌａに位置している。 At this time, the locking/unlocking mechanism 20 is in the two-way locked state shown in FIGS. 10 to 12 or in the unlocked state shown in FIG. 14 depending on the state of previous use.
10 and 12, the locking/unlocking mechanism 20 in the two-way locked state is such that the R-side semicircular tab 347R engaged with the R-side guide groove 232R is located in the deep groove portion 232Ra and the L-side guide The L-side semicircular tab 347L that engages with the groove 232L is located in the deep groove portion 232La.
　なお、Ｒ側半円タブ３４７Ｒが深溝部２３２Ｒａに位置すると（図１０のａ部拡大図）、Ｒ側半円タブ３４７Ｒと並設されたＲ側ラチェット爪３４８Ｒが、アウターリング３１のラチェットギア３１４に噛合する（図１２のａ部拡大図）。Ｒ側ラチェット爪３４８Ｒがラチェットギア３１４に噛合すると、スプリングリング３４及びナットリング２２に対してアウターリング３１及びスリーブ２３，２４はラチェット音を発しながら時計回り方向Ｒに回転できるものの、反時計回り方向Ｌの回転は規制されている。 When the R-side semi-circular tab 347R is positioned in the deep groove portion 232Ra (enlarged view of part a in FIG. 10), the R-side semi-circular tab 347R and the R-side ratchet pawl 348R arranged in parallel with each other are aligned with the ratchet gear 314 of the outer ring 31. (enlarged view of part a in FIG. 12). When the R-side ratchet pawl 348R meshes with the ratchet gear 314, the outer ring 31 and the sleeves 23, 24 can rotate in the clockwise direction R with respect to the spring ring 34 and the nut ring 22 while generating a ratchet sound, but they rotate in the counterclockwise direction. Rotation of L is restricted.
　また、Ｌ側半円タブ３４７Ｌが深溝部２３２Ｌａに位置すると（図１０のｂ部拡大図）、Ｌ側半円タブ３４７Ｌと並設されたＬ側ラチェット爪３４８Ｌが、アウターリング３１のラチェットギア３１４に噛合する（図１２のｂ部拡大図）。 Further, when the L-side semicircular tab 347L is positioned in the deep groove portion 232La (enlarged view of the b portion in FIG. 10), the L-side semicircular tab 347L and the L-side ratchet pawl 348L arranged in parallel with each other engages the ratchet gear 314 of the outer ring 31. (enlarged view of b in FIG. 12).
　Ｌ側ラチェット爪３４８Ｌがラチェットギア３１４に噛合すると、スプリングリング３４及びナットリング２２に対してアウターリング３１及びスリーブ２３，２４はラチェット音を発しながら反時計回り方向Ｌに回転できるものの、時計回り方向Ｒの回転は規制されている。 When the L-side ratchet pawl 348L meshes with the ratchet gear 314, the outer ring 31 and the sleeves 23, 24 can rotate in the counterclockwise direction L with respect to the spring ring 34 and the nut ring 22 while generating a ratchet sound, but they rotate in the clockwise direction. Rotation of R is restricted.
　つまり、Ｒ側半円タブ３４７Ｒが深溝部２３２Ｒａに位置するとともに、Ｌ側半円タブ３４７Ｌが深溝部２３２Ｌａに位置すると、ラチェット爪３４８がともにラチェットギア３１４に噛合するため、スプリングリング３４及びナットリング２２に対してアウターリング３１及びスリーブ２３，２４は反時計回り方向Ｌにも時計回り方向Ｒにも回転は規制されている。つまり、ナットリング２２、スリーブ２３，２４、アウターリング３１及びスプリングリング３４は回転方向において一体化した状態となる。 That is, when the R-side semicircular tab 347R is positioned in the deep groove portion 232Ra and the L-side semicircular tab 347L is positioned in the deep groove portion 232La, the ratchet pawl 348 is engaged with the ratchet gear 314, so that the spring ring 34 and the nut ring The rotation of the outer ring 31 and sleeves 23 and 24 with respect to 22 is restricted both in the counterclockwise direction L and in the clockwise direction R. That is, the nut ring 22, the sleeves 23 and 24, the outer ring 31 and the spring ring 34 are integrated in the rotational direction.
　なお、このとき、図１１（ｂ）のａ部拡大図に示すように、リング本体２２２と、遊嵌する差動凸部２３１とは、リング本体２２２における時計回り方向Ｒの位置に配置されるものの、差動凸部２３１は、端面２２２ａとは当接していない状態となる。 At this time, as shown in the enlarged view of part a in FIG. However, the differential protrusion 231 is not in contact with the end surface 222a.
　しかしながら、上述したように、図８（ａ）におけるａ部拡大図に示すようにロックリング３２の噛合ギア３２４とアウターリング３１のラチェットギア３１４とは噛合していない。つまり、ボディ１１に対して回転固定されたロックリング３２とアウターリング３１は噛合していないため、アウターリング３１はボディ１１に対する回転が規制されていない状態である。スリーブ２３，２４を時計回り方向Ｒに回転することで、３本のジョー１２を、同期させながらジョー装着孔１１５を傾斜方向に進行させて、挿入孔１１４に挿入された回転治具５の基軸５ａを周方向における三方向から把持して固定することができる。 However, as described above, the meshing gear 324 of the lock ring 32 and the ratchet gear 314 of the outer ring 31 do not mesh as shown in the enlarged view of part a in FIG. 8(a). That is, since the lock ring 32 fixed to rotate with respect to the body 11 and the outer ring 31 do not mesh with each other, the rotation of the outer ring 31 with respect to the body 11 is not restricted. By rotating the sleeves 23 and 24 in the clockwise direction R, the three jaws 12 are synchronously advanced in the jaw mounting hole 115 in the inclined direction, and the base axis of the rotary jig 5 inserted into the insertion hole 114 is moved. 5a can be held and fixed from three directions in the circumferential direction.
　また、図１４で図示するロック解除状態であるロック・解除機構２０は、Ｒ側案内溝２３２Ｒに係止するＲ側半円タブ３４７Ｒは浅溝部２３２Ｒｂに位置し、Ｌ側案内溝２３２Ｌに係止するＬ側半円タブ３４７Ｌも浅溝部２３２Ｌｂに位置している。 In addition, the lock/unlock mechanism 20 in the unlocked state shown in FIG. 14 has an R-side semicircular tab 347R that is locked in the R-side guide groove 232R. The L-side semicircular tab 347L is also located in the shallow groove portion 232Lb.
　なお、Ｒ側半円タブ３４７Ｒが浅溝部２３２Ｒｂに位置すると（図１４（ｂ）のａ部拡大図）、Ｒ側半円タブ３４７Ｒと並設されたＲ側ラチェット爪３４８Ｒは、アウターリング３１のラチェットギア３１４から離間して噛合が解消される（図１４（ｃ）のｄ部拡大図）。 When the R-side semi-circular tab 347R is positioned in the shallow groove portion 232Rb (enlarged view of part a in FIG. The engagement is released by separating from the ratchet gear 314 (enlarged view of d in FIG. 14(c)).
　Ｒ側ラチェット爪３４８Ｒがラチェットギア３１４から離間して噛合が解消されると、アウターリング３１及びスリーブ２３，２４に対してスプリングリング３４及びナットリング２２は時計回り方向Ｒにも反時計回り方向Ｌにも回転できる。 When the R-side ratchet pawl 348R is separated from the ratchet gear 314 and the engagement is released, the spring ring 34 and the nut ring 22 move in the clockwise direction R and the counterclockwise direction L with respect to the outer ring 31 and the sleeves 23 and 24. can also be rotated.
　また、Ｌ側半円タブ３４７Ｌが浅溝部２３２Ｌｂに位置すると（図１４（ｂ）のｂ部拡大図）、Ｌ側半円タブ３４７Ｌと並設されたＬ側ラチェット爪３４８Ｌは、アウターリング３１のラチェットギア３１４から離間して噛合が解消される（図１４（ｃ）のｅ部拡大図）。 Further, when the L-side semicircular tab 347L is positioned in the shallow groove portion 232Lb (enlarged view of portion b in FIG. The engagement is released by separating from the ratchet gear 314 (enlarged view of part e in FIG. 14(c)).
　Ｌ側ラチェット爪３４８Ｌがラチェットギア３１４から離間して噛合が解消されると、アウターリング３１及びスリーブ２３，２４に対してスプリングリング３４及びナットリング２２は時計回り方向Ｒにも反時計回り方向Ｌにも回転できる。 When the L-side ratchet pawl 348L is separated from the ratchet gear 314 and the meshing is released, the spring ring 34 and the nut ring 22 move in the clockwise direction R and the counterclockwise direction L with respect to the outer ring 31 and the sleeves 23 and 24. can also be rotated.
　つまり、Ｒ側半円タブ３４７Ｒが浅溝部２３２Ｒｂに位置するとともに、Ｌ側半円タブ３４７Ｌが浅溝部２３２Ｌｂに位置すると、ラチェット爪３４８がともにラチェットギア３１４から離間して噛合が解消されるため、アウターリング３１及びスリーブ２３，２４に対してスプリングリング３４及びナットリング２２は反時計回り方向Ｌにも時計回り方向Ｒにも回転できる。つまり、アウターリング３１及びスリーブ２３，２４とスプリングリング３４及びナットリング２２とは相対回転自在な状態となる。　
　なお、この状態は、図１４に示すロック解除状態となる。 That is, when the R-side semicircular tab 347R is positioned in the shallow groove portion 232Rb and the L-side semicircular tab 347L is positioned in the shallow groove portion 232Lb, both the ratchet pawls 348 are separated from the ratchet gear 314 and meshing is canceled. The spring ring 34 and the nut ring 22 can rotate both in the counterclockwise direction L and in the clockwise direction R with respect to the outer ring 31 and sleeves 23 and 24 . That is, the outer ring 31, the sleeves 23, 24, the spring ring 34, and the nut ring 22 are relatively rotatable.
This state is the unlocked state shown in FIG.
　このロック解除状態において、スリーブ２３，２４を時計回り方向Ｒに回転すると、ナットリング２２及びスプリングリング３４に対してスリーブ２３，２４が時計回り方向Ｒに相対回転する。　
　ナットリング２２及びスプリングリング３４に対してスリーブ２３，２４が時計回り方向Ｒに相対回転すると、リング本体２２２に遊嵌する差動凸部２３１は、図１４（ａ）のｃ部拡大図に示すような差動凸部２３１における反時計回り方向Ｌの側から時計回り方向Ｒに移動し、差動凸部２３１がリング本体２２２の時計回り方向Ｒの端面２２２ａに当接する。 When the sleeves 23 and 24 rotate in the clockwise direction R in this unlocked state, the sleeves 23 and 24 rotate in the clockwise direction R relative to the nut ring 22 and the spring ring 34 .
When the sleeves 23 and 24 rotate in the clockwise direction R relative to the nut ring 22 and spring ring 34, the differential protrusion 231 loosely fitted in the ring body 222 is shown in the enlarged view of part c of FIG. 14(a). The differential convex portion 231 moves in the clockwise direction R from the counterclockwise direction L side of the differential convex portion 231 , and the differential convex portion 231 contacts the end surface 222 a of the ring main body 222 in the clockwise direction R.
　さらなるスリーブ２３，２４の時計回り方向Ｒの回転によって、ナットリング２２及びスプリングリング３４は、スリーブ２３，２４とともに回転し、３本のジョー１２を、同期させながらジョー装着孔１１５を傾斜方向に進行させて、挿入孔１１４に挿入された回転治具５の基軸５ａを周方向における三方向から把持して固定することができる。 Further rotation of the sleeves 23, 24 in the clockwise direction R causes the nut ring 22 and the spring ring 34 to rotate together with the sleeves 23, 24, causing the three jaws 12 to synchronously advance through the jaw mounting holes 115 in an oblique direction. It is possible to grip and fix the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 from three circumferential directions.
　上述したように、ロック・解除機構２０が図１０乃至図１２で図示する両方向ロック状態、あるいは図１４に示すロック解除状態において、スリーブ２３，２４を時計回り方向Ｒに回転させ、挿入孔１１４に挿入された回転治具５の基軸５ａを、ナットリング２２によって同期させた３本のジョー１２で把持して固定してから、さらに、スリーブ２３，２４を時計回り方向Ｒに回転させても、回転治具５の基軸５ａを把持したジョー１２はジョー装着孔１１５をそれ以上進行することはできない。 10 to 12 or the unlocked state shown in FIG. Even if the base shaft 5a of the inserted rotary jig 5 is gripped and fixed by the three jaws 12 synchronized by the nut ring 22, and the sleeves 23 and 24 are further rotated in the clockwise direction R, The jaw 12 that grips the base shaft 5a of the rotating jig 5 cannot advance through the jaw mounting hole 115 any further.
　そのため、さらなるスリーブ２３，２４の時計回り方向Ｒの回転によって、基軸５ａを把持したジョー１２を反力として、ジョー１２のネジ溝１２１に螺合するナットリング２２に、基端側Ｂに移動しようとする力が作用する。 Therefore, by further rotating the sleeves 23 and 24 in the clockwise direction R, the jaw 12 gripping the base shaft 5a is used as a reaction force to move the nut ring 22 screwed into the thread groove 121 of the jaw 12 toward the base end side B. force acts.
　ナットリング２２に基端側Ｂに向かって移動しようとする力が作用すると、ナットリング２２と組み付けられたスプリングリング３４及びボール３３を介してロックリング３２に基端側Ｂに向かう方向の押圧力が作用する。 When a force acts on the nut ring 22 to move it toward the proximal side B, a pressing force in the direction toward the proximal side B is applied to the lock ring 32 via the spring ring 34 and the balls 33 assembled with the nut ring 22 . works.
　ロックリング３２に基端側Ｂに向かう方向の押圧力が作用すると、径外側が径内側より先端側Ｆとなるように断面が傾斜していたロックリング３２は、ロックリング３２の付勢力に抗して径外側が基端側Ｂに押されて、軸心方向Ｘに対して直交する方向にフラットな状態となる。 When a pressing force in the direction toward the base end side B acts on the lock ring 32 , the lock ring 32 whose cross section is inclined so that the radially outer side is closer to the distal side F than the radially inner side resists the biasing force of the lock ring 32 . Then, the radially outer side is pushed toward the base end side B, and becomes flat in the direction perpendicular to the axial direction X. As shown in FIG.
　ロックリング３２がフラットになると、図８（ｂ）のｂ部拡大図に示すように、リング本体３２２の基端側Ｂの面に形成した噛合ギア３２４と、アウターリング３１の後方リング面３１２の先端側Ｆの面に形成した噛合溝３１５とが軸心方向Ｘに噛合することとなる。 When the lock ring 32 becomes flat, as shown in the enlarged view of part b in FIG. The meshing groove 315 formed in the surface on the tip side F meshes in the axial direction X. As shown in FIG.
　リング本体３２２の基端側Ｂの面に形成した噛合ギア３２４と、アウターリング３１の後方リング面３１２の先端側Ｆの面に形成した噛合溝３１５とが軸心方向Ｘに噛合すると、回転固定タブ３２３がボディ１１の固定凹部１１２ａに嵌め込まれてボディ１１に対して回転が規制されたロックリング３２と、アウターリング３１とは回転が固定される。つまり、アウターリング３１は、ロックリング３２を介して、ボディ１１に対して回転が固定された状態となる（噛合状態）。 When the meshing gear 324 formed on the base end side B surface of the ring main body 322 and the meshing groove 315 formed on the front end side F surface of the rear ring surface 312 of the outer ring 31 are meshed in the axial direction X, rotation is fixed. The rotation of the outer ring 31 and the lock ring 32 whose rotation is restricted with respect to the body 11 by fitting the tab 323 into the fixing recess 112a of the body 11 are fixed. That is, the outer ring 31 is in a state where rotation is fixed with respect to the body 11 via the lock ring 32 (meshing state).
　上述のように、アウターリング３１がボディ１１に対して回転が固定された状態となってから、さらにアウタースリーブ２４を時計回り方向Ｒに回転すると、アウターリング３１に対してスリーブ２３，２４が時計回り方向Ｒに相対回転し、図１３（ｂ）のａ部拡大図に示すように、Ｒ側半円タブ３４７ＲがＲ側案内溝２３２Ｒの時計回り方向Ｒの基端側Ｂとなる面取溝部２３２Ｒｃに位置し、図１３（ｂ）のｂ部拡大図に示すように、Ｌ側半円タブ３４７Ｌが浅溝部２３２Ｌｂに位置することとなる。 As described above, after the outer ring 31 is fixed to rotate with respect to the body 11, when the outer sleeve 24 is further rotated in the clockwise direction R, the sleeves 23 and 24 move clockwise with respect to the outer ring 31. The chamfered groove portion relatively rotates in the rotational direction R, and as shown in the enlarged view of part a in FIG. 232Rc, and as shown in the enlarged view of the b portion of FIG. 13(b), the L-side semicircular tab 347L is positioned in the shallow groove portion 232Lb.
　Ｒ側半円タブ３４７Ｒが面取溝部２３２Ｒｃに位置すると（図１３（ｂ）のａ部拡大図）、Ｒ側半円タブ３４７Ｒと並設されたＲ側ラチェット爪３４８Ｒは、アウターリング３１のラチェットギア３１４から離間して噛合が解消される（図１３（ｃ）のｄ部拡大図）。Ｒ側ラチェット爪３４８Ｒがラチェットギア３１４から離間して噛合が解消されると、アウターリング３１及びスリーブ２３，２４に対してスプリングリング３４及びナットリング２２は時計回り方向Ｒにも反時計回り方向Ｌにも回転できる。 When the R-side semi-circular tab 347R is located in the chamfered groove portion 232Rc (enlarged view of part a in FIG. 13B), the R-side semi-circular tab 347R and the R-side ratchet pawl 348R arranged side by side are aligned with the ratchet of the outer ring 31. The engagement is released by separating from the gear 314 (enlarged view of d in FIG. 13(c)). When the R-side ratchet pawl 348R is separated from the ratchet gear 314 and the engagement is released, the spring ring 34 and the nut ring 22 move in the clockwise direction R and the counterclockwise direction L with respect to the outer ring 31 and the sleeves 23 and 24. can also be rotated.
　また、Ｌ側半円タブ３４７Ｌが浅溝部２３２Ｌｂに位置すると（図１３（ｂ）のｂ部拡大図）、Ｌ側半円タブ３４７Ｌと並設されたＬ側ラチェット爪３４８Ｌは、アウターリング３１のラチェットギア３１４から離間して噛合が解消される（図１３（ｃ）のｅ部拡大図）。Ｌ側ラチェット爪３４８Ｌがラチェットギア３１４から離間して噛合が解消されると、アウターリング３１及びスリーブ２３，２４に対してスプリングリング３４及びナットリング２２は時計回り方向Ｒにも反時計回り方向Ｌにも回転できる。 Further, when the L-side semicircular tab 347L is positioned in the shallow groove portion 232Lb (enlarged view of portion b in FIG. The engagement is released by separating from the ratchet gear 314 (enlarged view of part e in FIG. 13(c)). When the L-side ratchet pawl 348L is separated from the ratchet gear 314 and the meshing is released, the spring ring 34 and the nut ring 22 move in the clockwise direction R and the counterclockwise direction L with respect to the outer ring 31 and the sleeves 23 and 24. can also be rotated.
　そのため、スリーブ２３，２４を時計回り方向Ｒに回転すると、ナットリング２２及びスプリングリング３４に対してスリーブ２３，２４が時計回り方向Ｒに相対回転し、リング本体２２２に遊嵌する差動凸部２３１は、図１３（ａ）のｃ部拡大図に示すような差動凸部２３１における反時計回り方向Ｌ側から時計回り方向Ｒに移動し、差動凸部２３１がリング本体２２２の時計回り方向Ｒの端面２２２ａに当接し、さらなるスリーブ２３，２４の時計回り方向Ｒの回転によって、ナットリング２２及びスプリングリング３４は、スリーブ２３，２４とともに回転する。　
　ナットリング２２がさらに時計回り方向Ｒに回転すると、嵌合ネジ溝２２５とネジ溝１２１とが螺合するジョー１２の固定をより堅固に固定することができる。 Therefore, when the sleeves 23 and 24 are rotated in the clockwise direction R, the sleeves 23 and 24 rotate in the clockwise direction R relative to the nut ring 22 and the spring ring 34, and the differential projection loosely fitted to the ring body 222 is formed. 231 moves in the clockwise direction R from the counterclockwise direction L side of the differential protrusion 231 as shown in the enlarged view of part c of FIG. Abutting the end face 222a in the direction R, further rotation of the sleeves 23,24 in the clockwise direction R causes the nut ring 22 and the spring ring 34 to rotate together with the sleeves 23,24.
When the nut ring 22 rotates further in the clockwise direction R, the fixing of the jaw 12 in which the fitting thread groove 225 and the thread groove 121 are screwed together can be fixed more firmly.
　なお、この状態で、アウタースリーブ２４を時計回り方向Ｒに回転する力を解放すると、Ｒ側半円タブ３４７Ｒは面取溝部２３２Ｒｃに案内されているため、Ｒ側スプリングアーム３４６Ｒの付勢力によって、Ｒ側半円タブ３４７Ｒが深溝部２３２Ｒａに案内される。つまり、Ｒ側半円タブ３４７ＲをＲ側案内溝２３２Ｒに押付けるＲ側スプリングアーム３４６Ｒの付勢力によって、スリーブ２３，２４は、ナットリング２２及びスプリングリング３４に対して、反時計回り方向Ｌに自動的に回転し、Ｒ側半円タブ３４７Ｒが深溝部２３２Ｒａに案内される。 In this state, when the force that rotates the outer sleeve 24 in the clockwise direction R is released, the R side semicircular tab 347R is guided by the chamfered groove 232Rc, so that the biasing force of the R side spring arm 346R causes The R-side semicircular tab 347R is guided by the deep groove portion 232Ra. That is, the sleeves 23 and 24 are moved in the counterclockwise direction L with respect to the nut ring 22 and the spring ring 34 by the biasing force of the R side spring arm 346R that presses the R side semicircular tab 347R against the R side guide groove 232R. It rotates automatically, and the R-side semicircular tab 347R is guided to the deep groove portion 232Ra.
　Ｒ側半円タブ３４７Ｒが深溝部２３２Ｒａに案内されると、図１０乃至図１２に示すロック状態となる。このとき、上述の図１０乃至図１２の両方向ロック状態の説明の状況と異なり、ロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５とが噛合してアウターリング３１がボディ１１に回転固定されている。そのため、ジョー１２を堅固に固定した固定ロック状態はボディ１１に対して回転固定された状態となり、不用意に両方向ロック状態が解消されることが防止できる。 When the R-side semicircular tab 347R is guided by the deep groove portion 232Ra, the locked state shown in FIGS. 10 to 12 is established. 10 to 12, the engagement gear 324 of the lock ring 32 and the engagement groove 315 of the outer ring 31 are engaged with each other, so that the outer ring 31 is rotatably fixed to the body 11. It is Therefore, the fixed locked state in which the jaws 12 are firmly fixed becomes a state in which the jaws 12 are rotationally fixed with respect to the body 11, and it is possible to prevent the two-way locked state from being canceled inadvertently.
　なお、この両方向ロック状態では、両スプリングアーム３４６の付勢力が作用した状態で半円タブ３４７がともに、案内溝２３２に係合しているため、確実に両方向ロック状態を確実に維持することができる。したがって、不用意に、ロック・解除機構２０の両方向ロック状態が解消されることが防止できる。 In this bidirectionally locked state, both the semicircular tabs 347 are engaged with the guide grooves 232 with the biasing forces of both spring arms 346 acting, so that the bidirectionally locked state can be reliably maintained. can. Therefore, it is possible to prevent the locking/unlocking mechanism 20 from being inadvertently released from the two-way locked state.
　なお、上述固定ロック状態を解消して、チャック装置１から基軸５ａを取り外す際には、図１０乃至図１２に示すロック状態からアウタースリーブ２４を反時計回り方向Ｌに回転させることで、半円タブ３４７は共に、案内溝２３２の反時計回り方向Ｌの基端側Ｂによって径内側に案内されて、ロック・解除機構２０を上述の図１４に図示するロック解除状態とすることで、ラチェット爪３４８とラチェットギア３１４との噛合が解消され、差動凸部２３１をナットリング２２の反時計回り方向Ｌの端面２２２ａに当接させて、ナットリング２２を反時計回り方向Ｌに回転させて、ジョー１２を、ジョー装着孔１１５を後退させてジョー１２よる基軸５ａの把持を解消する。 When removing the base shaft 5a from the chuck device 1 by canceling the fixed locked state, the outer sleeve 24 is rotated in the counterclockwise direction L from the locked state shown in FIGS. Both of the tabs 347 are guided radially inward by the base end side B of the guide groove 232 in the counterclockwise direction L to put the lock/release mechanism 20 into the unlocked state shown in FIG. 348 is disengaged from the ratchet gear 314, the differential protrusion 231 is brought into contact with the end surface 222a of the nut ring 22 in the counterclockwise direction L, and the nut ring 22 is rotated in the counterclockwise direction L, The jaw 12 is retracted through the jaw mounting hole 115 to release the grip of the base shaft 5a by the jaw 12. - 特許庁
　あるいは、アウタースリーブ２４を反時計回り方向Ｌに回転させると、基軸５ａを把持するジョー１２を反力としてナットリング２２に作用する基端側Ｂの力が軽減する。ナットリング２２に作用する基端側Ｂの力が軽減すると、ボール３３を介してロックリング３２に作用していた基端側Ｂの押圧力も軽減し、ロックリング３２は皿ばねとして機能して付勢力によって当初の断面傾斜状態となる。 Alternatively, when the outer sleeve 24 is rotated in the counterclockwise direction L, the force on the base end side B acting on the nut ring 22 as a reaction force of the jaw 12 gripping the base shaft 5a is reduced. When the force on the proximal side B acting on the nut ring 22 is reduced, the pressing force on the proximal side B acting on the lock ring 32 via the balls 33 is also reduced, and the lock ring 32 functions as a disk spring. Due to the biasing force, the initial cross-sectional inclination state is obtained.
　そうすると、図８（ａ）に示すように、ロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５との軸心方向Ｘの噛合が解消され、アウターリング３１がボディ１１に対する回転方向の規制がなくなる。 Then, as shown in FIG. 8(a), the meshing between the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 in the axial direction X is released, and the outer ring 31 regulates the rotational direction with respect to the body 11. disappears.
　そのため、アウターリング３１、スプリングリング３４、ナットリング２２及びスリーブ２３，２４はボディ１１に対して回転自在となり、アウタースリーブ２４を反時計回り方向Ｌに回転させて、ジョー１２による基軸５ａの把持を解消することができる。 Therefore, the outer ring 31, the spring ring 34, the nut ring 22, and the sleeves 23 and 24 are rotatable with respect to the body 11. By rotating the outer sleeve 24 in the counterclockwise direction L, the jaws 12 can grip the base shaft 5a. can be resolved.
　なお、上述の固定ロック状態において、作業時の振動等によって、ジョー１２によって把持された回転治具５の基軸５ａが抜け出すと、ロック・解除機構２０がロック状態のままとなる、いわゆる“セルフロック状態”となる。 In the fixed and locked state described above, if the base shaft 5a of the rotating jig 5 gripped by the jaws 12 is pulled out due to vibration during work, the lock/release mechanism 20 remains in the locked state, that is, a so-called "self-locking state." state”.
　しかしながら、ロック・解除機構２０がロック状態であっても、ジョー１２で把持する基軸５ａが抜け出すことで、基軸５ａを把持するジョー１２を反力としたナットリング２２に作用する基端側Ｂの力がなくなり、上述したように、ロックリング３２が皿ばねとして機能して付勢力によって当初の断面傾斜状態となり、図８（ａ）に示すように、ロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５との軸心方向Ｘの噛合が解消される。　
　そのため、ロック状態のままのロック・解除機構２０を反時計回り方向Ｌに回転させて、ジョー１２を、ジョー装着孔１１５を後退させることができる。 However, even when the lock/unlock mechanism 20 is in the locked state, the base shaft 5a gripped by the jaws 12 is pulled out, causing the base end side B acting on the nut ring 22 with the reaction force of the jaws 12 gripping the base shaft 5a. When the force is released, the lock ring 32 functions as a disc spring as described above, and the urging force causes the cross section to assume the initial inclined state. As shown in FIG. The meshing with the meshing groove 315 in the axial direction X is canceled.
Therefore, the locking/unlocking mechanism 20 in the locked state can be rotated in the counterclockwise direction L to retract the jaw 12 from the jaw mounting hole 115 .
　上述したように、軸心方向Ｘ上で回転可能な駆動軸を有する駆動装置に装着するチャック装置１は、軸心方向Ｘ上に配置され、先端側Ｆに回転治具５の基軸５ａの挿入を許容する挿入孔１１４を有する略円筒状のボディ１１と、ボディ１１において、先端側Ｆで挿入孔１１４に連絡するとともに、基端側Ｂでボディ１１の側方に開口するジョー装着孔１１５に挿着され、ボディ１１に対して移動可能に配置された複数のジョー１２と、ボディ１１に対して回転自在に装着するとともに、回転操作によって回転力を入力するスリーブ２３，２４と、ボディ１１に回動可能に保持されるとともに、ボディ１１及びジョー１２に対する螺合によって複数のジョー１２を同期してジョー装着孔１１５内を傾斜方向に移動させるナットリング２２と、スリーブ２３，２４の回転力をナットリング２２に伝達する差動凸部２３１と、ボディ１１に対するナットリング２２の回転を規制するラチェットギア３１４及びラチェット爪３４８と、ラチェットギア３１４及びラチェット爪３４８によるナットリング２２の回転規制を解除する案内溝２３２及び半円タブ３４７とが備えられている。 As described above, the chuck device 1 attached to a driving device having a drive shaft rotatable in the axial direction X is arranged in the axial direction X, and the base shaft 5a of the rotating jig 5 is inserted into the distal end side F. and a jaw mounting hole 115 that communicates with the insertion hole 114 on the distal side F of the body 11 and opens to the side of the body 11 on the proximal side B of the body 11. a plurality of jaws 12 that are inserted and arranged movably with respect to the body 11; The rotational force of the nut ring 22 which is rotatably held and which synchronously moves the plurality of jaws 12 in the jaw mounting hole 115 in the inclined direction by screwing the body 11 and the jaws 12 together, and the sleeves 23 and 24 , rotates. The differential protrusion 231 that transmits to the nut ring 22, the ratchet gear 314 and the ratchet pawl 348 that restrict the rotation of the nut ring 22 with respect to the body 11, and the rotation restriction of the nut ring 22 by the ratchet gear 314 and the ratchet pawl 348 are released. A guide groove 232 and a semi-circular tab 347 are provided.
　チャック装置１のラチェットギア３１４及びラチェット爪３４８は、反時計回り方向Ｌの回転を規制するラチェットギア３１４及びＬ側ラチェット爪３４８Ｌと、時計回り方向Ｒの回転を規制するラチェットギア３１４及びＲ側ラチェット爪３４８Ｒとがある。 The ratchet gear 314 and ratchet pawl 348 of the chuck device 1 are composed of a ratchet gear 314 and an L-side ratchet pawl 348L that restrict rotation in the counterclockwise direction L, and a ratchet gear 314 and an R-side ratchet that restrict rotation in the clockwise direction R. There is a claw 348R.
　チャック装置１の案内溝２３２及び半円タブ３４７は、ラチェットギア３１４及びＬ側ラチェット爪３４８Ｌの回転規制を解除するＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌと、ラチェットギア３１４及びＲ側ラチェット爪３４８Ｒの回転規制を解除するＲ側案内溝２３２Ｒ及びＲ側半円タブ３４７Ｒとがある。 The guide groove 232 and the semicircular tab 347 of the chuck device 1 are composed of an L-side guide groove 232L and an L-side semicircular tab 347L that release the rotation restriction of the ratchet gear 314 and the L-side ratchet pawl 348L, the ratchet gear 314 and the R-side ratchet. There are an R-side guide groove 232R and an R-side semicircular tab 347R that release the rotation restriction of the pawl 348R.
　チャック装置１のＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌは、少なくともスリーブ２３，２４とナットリング２２との反時計回り方向Ｌの差動回転により、ラチェットギア３１４及びＬ側ラチェット爪３４８Ｌの回転規制を解除する。 The L-side guide groove 232L and the L-side semicircular tab 347L of the chuck device 1 are driven by the differential rotation of at least the sleeves 23, 24 and the nut ring 22 in the counterclockwise direction L to rotate the ratchet gear 314 and the L-side ratchet pawl 348L. Release the rotation restriction.
　チャック装置１のＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌは、少なくとも、スリーブ２３，２４とナットリング２２との時計回り方向Ｒの差動回転により、ラチェットギア３１４及びＲ側ラチェット爪３４８Ｒの回転規制を解除する。そのため、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることのない締付けを実現することができる。 The L-side guide groove 232L and the L-side semicircular tab 347L of the chuck device 1 at least rotate the ratchet gear 314 and the R-side ratchet pawl 348R by the differential rotation of the sleeves 23, 24 and the nut ring 22 in the clockwise direction R. Release the rotation restriction. Therefore, it is possible to achieve tightening that prevents the locked state from being unintentionally released or the locked state from which it becomes impossible to release.
　詳述すると、ボディ１１に設けられたギア状のラチェットギア３１４と、ナットリング２２に取付けられ、ラチェットギア３１４に係止するラチェット爪３４８とを有する案内溝２３２及び半円タブ３４７は、ラチェットギア３１４及びＬ側ラチェット爪３４８Ｌの回転規制を解除するＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌと、ラチェットギア３１４及びＲ側ラチェット爪３４８Ｒの回転規制を解除するＲ側案内溝２３２Ｒ及びＲ側半円タブ３４７Ｒとがある。 More specifically, a guide groove 232 having a gear-shaped ratchet gear 314 provided on the body 11, and a ratchet pawl 348 attached to the nut ring 22 and engaging the ratchet gear 314, and a semicircular tab 347 form the ratchet gear. 314 and the L side guide groove 232L and the L side semicircular tab 347L that release the rotation restriction of the L side ratchet pawl 348L, and the R side guide groove 232R and the R side that release the rotation restriction of the ratchet gear 314 and the R side ratchet pawl 348R. There is a semi-circular tab 347R.
　スリーブ２３，２４とナットリング２２との反時計回り方向Ｌの差動回転により、少なくともＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌがラチェットギア３１４及びＬ側ラチェット爪３４８Ｌの回転規制を解除する。 Due to the differential rotation of the sleeves 23, 24 and the nut ring 22 in the counterclockwise direction L, at least the L side guide groove 232L and the L side semicircular tab 347L release the rotation restriction of the ratchet gear 314 and the L side ratchet pawl 348L. .
　また、スリーブ２３，２４とナットリング２２との時計回り方向Ｒの差動回転により、少なくともＲ側案内溝２３２Ｒ及びＲ側半円タブ３４７Ｒがラチェットギア３１４及びＲ側ラチェット爪３４８Ｒの回転規制を解除する。そのため、スリーブ２３，２４とナットリング２２とを差動回転させなければ、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることを防止することができる。 Further, due to the differential rotation of the sleeves 23, 24 and the nut ring 22 in the clockwise direction R, at least the R side guide groove 232R and the R side semicircular tab 347R release the rotation restriction of the ratchet gear 314 and the R side ratchet pawl 348R. do. Therefore, if the sleeves 23 and 24 and the nut ring 22 are not differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released.
　また、ラチェットギア３１４を、ボディ１１に対して回転方向を固定するアウターリング３１及びロックリング３２が設けられ、アウターリング３１及びロックリング３２は、ボディ１１に対して回転方向が固定された噛合ギア３２４と、ラチェットギア３１４に設けられ、噛合ギア３２４と軸心方向Ｘに噛合する噛合溝３１５とを有し、スリーブ２３，２４の反時計回り方向Ｌの回転入力による、基軸５ａを把持するジョー１２を反力としたナットリング２２の基端側への移動によって、噛合ギア３２４と噛合溝３１５とが噛合して、噛合ギア３２４がボディ１１に対して固定されるとともに、スリーブ２３，２４とナットリング２２との反時計回り方向Ｌの差動回転により、少なくともＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌがラチェットギア３１４及びＬ側ラチェット爪３４８Ｌの回転規制を解除し、スリーブ２３，２４とナットリング２２との時計回り方向Ｒの差動回転により、Ｒ側案内溝２３２Ｒ及びＲ側半円タブ３４７Ｒがラチェットギア３１４及びＲ側ラチェット爪３４８Ｒの回転規制を解除する。 Further, an outer ring 31 and a lock ring 32 are provided to fix the rotation direction of the ratchet gear 314 with respect to the body 11, and the outer ring 31 and the lock ring 32 are meshing gears whose rotation direction is fixed with respect to the body 11. 324 and an engagement groove 315 provided in the ratchet gear 314 and engaged with the engagement gear 324 in the axial direction X, and gripping the base shaft 5a by rotational input of the sleeves 23, 24 in the counterclockwise direction L. By moving the nut ring 22 toward the base end side with the reaction force of 12, the meshing gear 324 and the meshing groove 315 are meshed, and the meshing gear 324 is fixed to the body 11, and the sleeves 23 and 24 are engaged. Due to the differential rotation in the counterclockwise direction L with the nut ring 22, at least the L side guide groove 232L and the L side semicircular tab 347L release the rotation restriction of the ratchet gear 314 and the L side ratchet pawl 348L. and the nut ring 22 rotate in the clockwise direction R, the R-side guide groove 232R and the R-side semicircular tab 347R release the rotation restriction of the ratchet gear 314 and the R-side ratchet pawl 348R.
　そのため、上述のように、スリーブ２３，２４とナットリング２２とを差動回転させなければ、ロック状態が不用意に解除されたり、ロック状態が解除できなくなったりすることを防止することができる。さらに、挿入孔１１４に挿入され、複数のジョー１２で把持された回転治具５の基軸５ａがロック状態のまま不用意に抜けた場合、いわゆるセルフロック状態となっても、噛合ギア３２４と噛合溝３１５とは非噛合状態となるため、ロック状態が解除できなくなるという不具合を解消することができる。 Therefore, as described above, if the sleeves 23, 24 and the nut ring 22 are not differentially rotated, it is possible to prevent the locked state from being unintentionally released or the locked state from being unable to be released. Furthermore, when the base shaft 5a of the rotating jig 5 inserted into the insertion hole 114 and gripped by the plurality of jaws 12 is accidentally pulled out in a locked state, even if a so-called self-locking state occurs, the meshing gear 324 is engaged. Since the groove 315 is not engaged with the groove 315, it is possible to solve the problem that the locked state cannot be released.
　また、噛合ギア３２４は、周方向且つ軸心方向Ｘに対して傾斜する帯状のリング体であり、周方向且つ軸心方向Ｘに対して傾斜する噛合ギア３２４と噛合溝３１５とは非噛合状態であり、ナットリング２２の基端側への移動により、傾斜する噛合ギア３２４が捩れ変形して噛合ギア３２４と噛合溝３１５とが噛合状態となる。 The meshing gear 324 is a belt-shaped ring body that is inclined with respect to the circumferential direction and the axial direction X. As the nut ring 22 moves to the base end side, the inclined meshing gear 324 is torsionally deformed, and the meshing gear 324 and the meshing groove 315 are brought into a meshing state.
　そのため、傾斜するロックリング３２（噛合ギア３２４）の捩れ変形によって、つまりロックリング３２（噛合ギア３２４）は皿ばねとして機能し、噛合ギア３２４と噛合溝３１５との噛合と非噛合とを切り替えることができる。 Therefore, the torsional deformation of the inclined lock ring 32 (engagement gear 324), that is, the lock ring 32 (engagement gear 324) functions as a disk spring, and the engagement and disengagement of the engagement gear 324 and the engagement groove 315 can be switched. can be done.
　また、軸心方向Ｘの先端側ＦからＢに向かって、ナットリング２２、噛合ギア３２４及び噛合溝３１５の順で配置され、ナットリング２２と噛合ギア３２４との間に複数のボール３３が設けられてロックベアリング３０が構成されている。そのため、ボディ１１に固定された噛合ギア３２４に対してナットリング２２をスムーズに回転させることができる。 In addition, the nut ring 22, the meshing gear 324, and the meshing groove 315 are arranged in this order from the distal end side F toward B in the axial direction X, and a plurality of balls 33 are provided between the nut ring 22 and the meshing gear 324. A lock bearing 30 is constructed by Therefore, the nut ring 22 can be smoothly rotated with respect to the meshing gear 324 fixed to the body 11 .
　また、スリーブ２３，２４に設けられた案内溝２３２に案内される半円タブ３４７を案内溝２３２に押付けるスプリングアーム３４６を有し、ラチェット爪３４８は、半円タブ３４７とともに案内される構成である。 It also has a spring arm 346 that presses against the guide groove 232 a semicircular tab 347 guided by the guide groove 232 provided in the sleeves 23 and 24 , and the ratchet pawl 348 is guided together with the semicircular tab 347 . be.
　そのため、スリーブ２３，２４とナットリング２２の差動回転により、少なくともスリーブ２３，２４に設けられた案内溝２３２に対してスプリングアーム３４６によって押付けられる半円タブ３４７は、案内溝２３２で案内されることで、ラチェット爪３４８の係止と係止解除とを案内することができる。 Therefore, due to the differential rotation of the sleeves 23, 24 and the nut ring 22, at least the semicircular tab 347 pressed by the spring arm 346 against the guide grooves 232 provided in the sleeves 23, 24 is guided by the guide grooves 232. Thus, locking and unlocking of the ratchet pawl 348 can be guided.
　また、案内溝２３２は、溝深さが深い深溝部２３２Ｒａ，２３２Ｌａと、溝深さが浅い浅溝部２３２Ｒｂ，２３２Ｌｂとを有している。そして、半円タブ３４７が深溝部２３２Ｒａ，２３２Ｌａに案内されると、ラチェット爪３４８がラチェットギア３１４に係止してロック状態となる。 Further, the guide groove 232 has deep groove portions 232Ra and 232La with deep groove depths and shallow groove portions 232Rb and 232Lb with shallow groove depths. Then, when the semicircular tab 347 is guided to the deep grooves 232Ra and 232La, the ratchet pawl 348 engages with the ratchet gear 314 to enter a locked state.
　逆に、半円タブ３４７が浅溝部２３２Ｒｂ，２３２Ｌｂに案内されると、ラチェットギア３１４へのラチェット爪３４８の係止が解除してロック解除状態となる。　
　したがって、スリーブ２３，２４とナットリング２２の差動回転により、少なくともスリーブ２３，２４に設けられた案内溝２３２に対してスプリングアーム３４６によって押付けられる半円タブ３４７が、溝深さが深い深溝部２３２Ｒａ，２３２Ｌａに案内されることでラチェット爪３４８がラチェットギア３１４に係止してロック状態となり、溝深さが浅い浅溝部２３２Ｒｂ，２３２Ｌｂに半円タブ３４７に案内されると、ラチェットギア３１４へのラチェット爪３４８の係止が解除してロック解除状態となることができる。 Conversely, when the semicircular tab 347 is guided by the shallow grooves 232Rb and 232Lb, the latching of the ratchet pawl 348 to the ratchet gear 314 is released and the lock is released.
Therefore, due to the differential rotation of the sleeves 23, 24 and the nut ring 22, the semi-circular tabs 347 pressed by the spring arms 346 against the guide grooves 232 provided in the sleeves 23, 24 at least move toward the deep groove portions. 232Ra, 232La, the ratchet pawl 348 engages with the ratchet gear 314 to be locked, and when guided by the semicircular tab 347 in the shallow grooves 232Rb, 232Lb, the ratchet gear 314 The latching of the ratchet pawl 348 can be released to enter the unlocked state.
　また、半円タブ３４７は、案内溝２３２に向かって凸状となる円弧形状であるとともに、深溝部２３２Ｒａと浅溝部２３２Ｒｂとが周方向に所定間隔を隔てて配置され、半円タブ３４７が深溝部２３２Ｒａと浅溝部２３２Ｒｂとの間の凸溝部２３２Ｒｄに当接する状態において、スプリングアーム３４６の付勢力によって、半円タブ３４７が深溝部２３２Ｒａか浅溝部２３２Ｒｂのいずれかに、自動的に案内される。 The semicircular tab 347 has an arcuate shape that protrudes toward the guide groove 232, and a deep groove portion 232Ra and a shallow groove portion 232Rb are arranged with a predetermined interval in the circumferential direction. In the state of abutting on the convex groove portion 232Rd between the portion 232Ra and the shallow groove portion 232Rb, the biasing force of the spring arm 346 automatically guides the semicircular tab 347 to either the deep groove portion 232Ra or the shallow groove portion 232Rb. .
　なお、上述のチャック装置１では、スリーブ２３，２４を時計回り方向Ｒに回転させ、挿入孔１１４に挿入された回転治具５の基軸５ａを、ナットリング２２によって同期させた３本のジョー１２で把持して固定してから、さらに、スリーブ２３，２４を時計回り方向Ｒに回転させ、基軸５ａを把持したジョー１２を反力として、ロックリング３２に基端側Ｂに向かう方向の力を作用させて、軸心方向Ｘに対して直交する方向にロックリング３２をフラットな状態とし、リング本体３２２の基端側Ｂの面に形成した噛合ギア３２４と、アウターリング３１の後方リング面３１２の先端側Ｆの面に形成した噛合溝３１５とが軸心方向Ｘに噛合させることで、アウターリング３１をボディ１１に対して回転固定した。　 In the chuck device 1 described above, the sleeves 23 and 24 are rotated in the clockwise direction R, and the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 is synchronized with the three jaws 12 by the nut ring 22. , the sleeves 23 and 24 are further rotated in the clockwise direction R, and force directed toward the proximal side B is applied to the lock ring 32 using the jaw 12 that grips the base shaft 5a as a reaction force. The lock ring 32 is flattened in the direction orthogonal to the axial direction X, and the meshing gear 324 formed on the surface of the base end side B of the ring main body 322 and the rear ring surface 312 of the outer ring 31 are engaged with each other. The outer ring 31 is rotatably fixed to the body 11 by meshing in the axial direction X with the meshing groove 315 formed on the surface of the distal end side F of the outer ring 31 .　
　つまり、チャック装置１は、ジョー１２で基軸５ａを把持していない状態ではアウターリング３１はボディ１１に対して回転自在な状態であり、ジョー１２で基軸５ａを把持してからの時計回り方向Ｒの回転操作によってロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５とを噛合させて、ボディ１１に対してアウターリング３１を回転規制したが、アウターリング３１とロックリング３２とを一体で構成してもよい。 That is, in the chuck device 1, the outer ring 31 is rotatable with respect to the body 11 when the jaws 12 are not gripping the base shaft 5a. By rotating the lock ring 32, the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 are meshed to restrict the rotation of the outer ring 31 with respect to the body 11. may be configured.
　具体的には、図１５及び図１６に示すように、別の実施形態のチャック装置１Ｘでは、ロックリング３２を備えず、アウターリング３１Ｘを備えて構成している。　
　なお、以下のチャック装置１Ｘの説明において、チャック装置１と同じ構成については同じ符号を付してその説明を省略する。 Specifically, as shown in FIGS. 15 and 16, a chuck device 1X according to another embodiment does not include a lock ring 32 but includes an outer ring 31X.
In addition, in the following description of the chuck device 1X, the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
　アウターリング３１Ｘは、上述のチャック装置１のアウターリング３１とロックリング３２との機能を備えている。　
　詳しくは、アウターリング３１Ｘは、アウターリング３１と同様に、中央開口３１１を有するリング体であり、後方リング面３１２と外周側面３１３とを備え、中央開口３１１の内面にラチェットギア３１４を備えている。　
　また、後方リング面３１２の内周縁に、上述のロックリング３２の回転固定タブ３２３に対応する回転固定タブ３１６を備えている。 The outer ring 31X has the functions of the outer ring 31 and the lock ring 32 of the chuck device 1 described above.
Specifically, like the outer ring 31, the outer ring 31X is a ring body having a central opening 311, has a rear ring surface 312 and an outer peripheral side surface 313, and has a ratchet gear 314 on the inner surface of the central opening 311. .
The inner peripheral edge of the rear ring face 312 is also provided with rotation locking tabs 316 corresponding to the rotation locking tabs 323 of the lock ring 32 described above.
　これにより、チャック装置１Ｘは、アウターリング３１Ｘが常時ボディ１１に対して回転が規制された状態となる。　
　このため、チャック装置１Ｘは、上述のチャック装置１のように、基軸５ａを把持したジョー１２を反力として、ロックリング３２に基端側Ｂに向かう方向の力を作用させて、リング本体３２２の基端側Ｂの面に形成した噛合ギア３２４と、アウターリング３１の後方リング面３１２の先端側Ｆの面に形成した噛合溝３１５とを軸心方向Ｘに噛合させることで、アウターリング３１をボディ１１に対して回転固定するという機能は有さないものの、チャック装置１で奏するその他効果を同様に奏することができる。 As a result, the chuck device 1X is in a state where the rotation of the outer ring 31X with respect to the body 11 is always restricted.
For this reason, the chuck device 1X, like the chuck device 1 described above, uses the jaws 12 gripping the base shaft 5a as a reaction force to apply a force in the direction toward the base end side B to the lock ring 32, so that the ring body 322 The meshing gear 324 formed on the base end side B surface of the outer ring 31 and the meshing groove 315 formed on the front end side F surface of the rear ring surface 312 of the outer ring 31 are meshed in the axial direction X, so that the outer ring 31 Although it does not have the function of rotating and fixing to the body 11, other effects of the chuck device 1 can be achieved in the same manner.
　続いて、さらに別の実施形態のチャック装置１Ｙについて、図１７乃至図２０とともに説明する　
　なお、以下のチャック装置１Ｙの説明において、チャック装置１と同じ構成については同じ符号を付してその説明を省略する。 Subsequently, a chuck device 1Y of still another embodiment will be described with reference to FIGS. 17 to 20.
In addition, in the following description of the chuck device 1Y, the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
　図１７乃至図２０で図示するチャック装置１Ｙは、チャック装置１における案内溝２３２の形状を単純化している。　
　具体的には、上述のチャック装置１では、Ｒ側半円タブ３４７Ｒが係止して案内されるＲ側案内溝２３２Ｒを略フタコブ状に形成し、Ｌ側半円タブ３４７Ｌが係止して案内されるＬ側案内溝２３２Ｌを略ヒトコブ状に形成する、つまり前方突出部３４４において時計回り方向ＲのＲ側半円タブ３４７Ｒが係止するＲ側案内溝２３２ＲとＬ側半円タブ３４７Ｌが係止するＬ側案内溝２３２Ｌとで異なる溝形状で形成した。 17 to 20, the shape of the guide groove 232 in the chuck device 1 is simplified.
Specifically, in the chuck device 1 described above, the R-side guide groove 232R in which the R-side semicircular tab 347R is engaged and guided is formed in a substantially hump shape, and the L-side semicircular tab 347L is engaged. The L-side guide groove 232L to be guided is formed in a substantially hump shape, that is, the R-side guide groove 232R and the L-side semicircular tab 347L in which the R-side semicircular tab 347R in the clockwise R direction is engaged in the forward projecting portion 344 are formed. The L-side guide groove 232L to be locked is formed with a different groove shape.
　これに対して、チャック装置１Ｙは、図１７（ｂ）及び図１８に示すように、単なる凹状に形成された案内溝２３２Ｙであり、時計回り方向ＲのＲ側案内溝２３２ＹＲと反時計回り方向ＬのＬ側案内溝２３２ＹＬとを同じ溝形状で形成している。また、案内溝２３２Ｙ自体も時計回り方向Ｒと反時計回り方向Ｌとで同じ対称形状で形成している。 On the other hand, as shown in FIGS. 17B and 18, the chuck device 1Y has a guide groove 232Y formed in a simple concave shape, and has an R-side guide groove 232YR in the clockwise direction R and an R-side guide groove 232YR in the counterclockwise direction. The L side guide groove 232YL of L is formed in the same groove shape. Further, the guide groove 232Y itself is also formed in the same symmetrical shape in the clockwise direction R and the counterclockwise direction L. As shown in FIG.
　このように形成したチャック装置１Ｙのロック・解除機構２０Ｙは、ナットリング２２に対してアウタースリーブ２４を少し相対回転することで、ラチェットギア３１４に対するラチェット爪３４８の噛合を解消することができる。 The locking/unlocking mechanism 20Y of the chuck device 1Y thus formed can disengage the ratchet pawl 348 from the ratchet gear 314 by slightly rotating the outer sleeve 24 relative to the nut ring 22.
　具体的には、図１９（ｂ）に示すように、スリーブ２３Ｙ，２４をナットリング２２に対して時計回り方向Ｒに回転させると、半円タブ３４７は共に時計回り方向Ｒの基端側Ｂの案内溝２３２Ｙによって径内側に案内され、図１９（ｃ）に示すように、ラチェットギア３１４に対するラチェット爪３４８の噛合を解消することができる。 Specifically, as shown in FIG. 19(b), when the sleeves 23Y and 24 are rotated in the clockwise direction R with respect to the nut ring 22, the semicircular tabs 347 are both rotated in the clockwise direction R toward the base end side B. 19C, the ratchet pawl 348 can be disengaged from the ratchet gear 314 as shown in FIG. 19(c).
　逆に、図２０（ｂ）に示すように、スリーブ２３Ｙ，２４をナットリング２２に対して反時計回り方向Ｌに回転させると、半円タブ３４７は共に反時計回り方向Ｌの基端側Ｂの案内溝２３２Ｙによって径内側に案内され、図２０（ｃ）に示すように、ラチェットギア３１４に対するラチェット爪３４８の噛合を解消することができる。 Conversely, when the sleeves 23Y and 24 are rotated in the counterclockwise direction L with respect to the nut ring 22, as shown in FIG. 20(c), the ratchet pawl 348 can be disengaged from the ratchet gear 314. As shown in FIG.
　このように構成されたチャック装置１Ｙは、上述のチャック装置１と同様の効果を奏することができる。　
　また、チャック装置１Ｙは、案内溝２３２Ｙ自体の周方向長さが、チャック装置１の案内溝２３２より短いため、差動凸部２３１と差動凹部２２３との遊嵌量を小さくでき、ロック・解除機構２０Ｙのロック状態とロック解除状態の切り替えを、スリーブ２３，２４とナットリング２２及びスプリングリング３４との小さな差動量で実現することができる。 The chuck device 1Y configured in this manner can achieve the same effects as the chuck device 1 described above.
Further, in the chuck device 1Y, since the guide groove 232Y itself has a circumferential length shorter than that of the guide groove 232 of the chuck device 1, the amount of loose fitting between the differential convex portion 231 and the differential concave portion 223 can be reduced. Switching between the locked state and the unlocked state of the release mechanism 20Y can be realized with a small amount of differential between the sleeves 23 and 24 and the nut ring 22 and spring ring 34 .
　さらに、上述のチャック装置１では、アウターリング３１の先端側Ｆにロックリング３２を配置し、基軸５ａを把持するジョー１２を反力として、基端側Ｂの力を、ボール３３を介してロックリング３２に作用させ、ロックリング３２の噛合ギア３２４とアウターリング３１の噛合溝３１５とを軸心方向Ｘに噛合させたが、図２１に示すように、アウターリング３１Ｚの基端側Ｂにロックリング３２Ｚを配置してもよい。　
　なお、以下の説明において、チャック装置１と同じ構成については同じ符号を付してその説明を省略する。 Furthermore, in the above-described chuck device 1, the lock ring 32 is arranged on the distal end side F of the outer ring 31, and the force on the proximal end side B is locked via the ball 33 using the jaw 12 that grips the base shaft 5a as a reaction force. By acting on the ring 32, the meshing gear 324 of the lock ring 32 and the meshing groove 315 of the outer ring 31 were meshed in the axial direction X, but as shown in FIG. A ring 32Z may be arranged.
In the following description, the same components as those of the chuck device 1 are denoted by the same reference numerals, and the description thereof is omitted.
　この場合、図２１（ａ）に示すように、スプリングリング３４及びボール３３が組付けられるアウターリング３１Ｚの後方リング面３１２Ｚの基端側Ｂの面に噛合溝３１５Ｚを形成している。なお、本実施形態では、アウターリング３１Ｚ、スプリングリング３４及びボール３３が組付けられるロックベアリング３０Ｚを構成している。 In this case, as shown in FIG. 21(a), an engaging groove 315Z is formed on the base end side B of the rear ring surface 312Z of the outer ring 31Z to which the spring ring 34 and the balls 33 are assembled. In this embodiment, a lock bearing 30Z to which the outer ring 31Z, the spring ring 34 and the balls 33 are assembled is configured.
　また、図２１（ｂ）に示すように、ロックリング３２Ｚを構成するリング本体３２２の先端側Ｆの面に噛合ギア３２４Ｚを設け、ロックベアリング３０Ｚ（アウターリング３１Ｚ）の基端側Ｂに配置する。 Further, as shown in FIG. 21(b), a meshing gear 324Z is provided on the surface of the front end side F of the ring body 322 that constitutes the lock ring 32Z, and is arranged on the base end side B of the lock bearing 30Z (outer ring 31Z). .
　ロックベアリング３０Ｚ（アウターリング３１Ｚ）の基端側Ｂに配置されたロックリング３２Ｚは、ボディ１１の中胴部１１２におけるフランジ部とアウターリング３１Ｚとの間に挟まれるような態様となり、ロックリング３２Ｚの回転固定タブ３２３が、フランジ部の先端側Ｆに形成された固定凹部１１２ａと嵌合することとなる。 The lock ring 32Z arranged on the base end side B of the lock bearing 30Z (outer ring 31Z) is sandwiched between the flange portion of the middle body portion 112 of the body 11 and the outer ring 31Z. The rotation fixing tab 323 is fitted in the fixing concave portion 112a formed in the distal end side F of the flange portion.
　このように構成したロックベアリング３０Ｚ（アウターリング３１Ｚ）及びロックリング３２Ｚを組み付けた状態で、基軸５ａを把持するジョー１２を反力とした基端側Ｂの力を、アウターリング３１Ｚを介してロックリング３２Ｚに作用させることで、アウターリング３１Ｚとロックリング３２Ｚとが噛合することとなり、上述のチャック装置１と同様の効果を奏することができる。 In a state where the lock bearing 30Z (outer ring 31Z) and the lock ring 32Z configured as described above are assembled, the force on the base end side B, which is the reaction force of the jaw 12 gripping the base shaft 5a, is locked via the outer ring 31Z. By acting on the ring 32Z, the outer ring 31Z and the lock ring 32Z are engaged with each other, and the same effects as those of the chuck device 1 described above can be obtained.
　続いて、別の形態のチャック装置１Ｗについて以下図２２乃至図３１に基づいて詳述する。　
　図２２はチャック装置１Ｗを備えた電動工具の正面図を示し、図２３はチャック装置１Ｗの各構成要素の基端側Ｂからの分解斜視図を示し、図２４はチャック装置１Ｗの各構成要素の先端側Ｆからの分解斜視図を示し、図２５はチャック装置１Ｗの縦断面図を示している。 Next, another embodiment of the chuck device 1W will be described in detail below with reference to FIGS. 22 to 31. FIG.
22 shows a front view of an electric power tool provided with the chuck device 1W, FIG. 23 shows an exploded perspective view of each component of the chuck device 1W from the base end side B, and FIG. 24 shows each component of the chuck device 1W. 25 shows a longitudinal sectional view of the chuck device 1W.
　図２６はナットリング２２Ｗとスプリングリング３４Ｗの説明図を示し、図２７は組付け状態のナットリング２２Ｗ及びスプリングリング３４Ｗの説明図を示し、図２８はアウタースリーブ２４Ｗと組付け状態のナットリング２２Ｗ及びスプリングリング３４Ｗの説明図を示している。 26 shows an explanatory diagram of the nut ring 22W and the spring ring 34W, FIG. 27 shows an explanatory diagram of the assembled nut ring 22W and the spring ring 34W, and FIG. 28 shows the outer sleeve 24W and the assembled nut ring 22W. and an explanatory diagram of a spring ring 34W.
　詳述すると、図２６（ａ）は基端側Ｂからのナットリング２２Ｗ及びスプリングリング３４Ｗの斜視図を示し、図２６（ｂ）は先端側Ｆからのナットリング２２Ｗ及びスプリングリング３４Ｗの斜視図を示している。 Specifically, FIG. 26(a) shows a perspective view of the nut ring 22W and the spring ring 34W from the proximal side B, and FIG. 26(b) is a perspective view of the nut ring 22W and the spring ring 34W from the distal side F. is shown.
　また、図２７（ａ）は基端側Ｂからの組付け状態のナットリング２２Ｗ及びスプリングリング３４Ｗの斜視図を示し、図２７（ｂ）は先端側Ｆからの組付け状態のナットリング２２Ｗ及びスプリングリング３４Ｗの斜視図を示している。　
　図２８（ａ）はアウタースリーブ２４Ｗを基端側Ｂから視た図を示し、図２８（ｂ）は組付け状態のナットリング２２Ｗ及びスプリングリング３４Ｗを先端側Ｆから視た図を示している。 27(a) shows a perspective view of the nut ring 22W and the spring ring 34W assembled from the base end side B, and FIG. A perspective view of the spring ring 34W is shown.
28(a) shows a view of the outer sleeve 24W viewed from the base end side B, and FIG. 28(b) shows a view of the assembled nut ring 22W and spring ring 34W viewed from the distal end side F. .
　図２９乃至図３１は各状態のチャック装置１Ｗの断面図による説明図を示している。　
　詳述すると、図２９（ａ）は緩み状態のチャック装置１Ｗの図２５におけるＤ－Ｄ矢視断面図を示し、図２９（ｂ）は同状態の図２５におけるＥ－Ｅ矢視断面図を示している。 29 to 31 show explanatory diagrams by sectional views of the chuck device 1W in each state.
Specifically, FIG. 29(a) shows a cross-sectional view of the chuck device 1W in a loosened state taken along line DD in FIG. 25, and FIG. 29(b) shows a cross-sectional view taken along line EE in FIG. 25 in the same state. showing.
　図３０（ａ）は締付け途中状態のチャック装置１Ｗの図２５におけるＤ－Ｄ矢視断面図を示し、図３０（ｂ）は同状態の図２５におけるＥ－Ｅ矢視断面図を示し、図３１（ａ）は締付け状態のチャック装置１Ｗの図２５におけるＤ－Ｄ矢視断面図を示し、図３１（ｂ）は同状態の図２５におけるＥ－Ｅ矢視断面図を示している。 30(a) shows a cross-sectional view of the chuck device 1W in the middle of tightening as seen from the arrows DD in FIG. 25, and FIG. 30(b) shows a cross-sectional view from the arrows EE in FIG. 31(a) shows a cross-sectional view of the chuck device 1W in the tightened state taken along line DD in FIG. 25, and FIG. 31(b) shows a cross-sectional view taken along line EE in FIG. 25 in the same state.
　なお、以下における、チャック装置１Ｗの説明において、上述のチャック装置１，１Ｘ，１Ｙ等における構成と同じ構成については、同じ符号を付してその説明を省略する。　
　具体的には、チャック装置１Ｗにおけるジョー１２及びボール３３は、上述の説明におけるジョー１２及びボール３３と同じ構成であり、チャック装置１Ｗにおけるアウターリング３１Ｚとロックリング３２Ｚは上述の説明におけるチャック装置１Ｙにおけるアウターリング３１Ｚとロックリング３２Ｚと同じ構成であるため、その説明を省略する。 In the following description of the chuck device 1W, the same components as those in the above-described chuck devices 1, 1X, 1Y, etc. are denoted by the same reference numerals, and their descriptions are omitted.
Specifically, the jaws 12 and balls 33 in the chuck device 1W have the same configuration as the jaws 12 and balls 33 in the above description, and the outer ring 31Z and the lock ring 32Z in the chuck device 1W are the same as those in the chuck device 1Y in the above description. Since the configurations are the same as those of the outer ring 31Z and the lock ring 32Z in , the description thereof will be omitted.
　チャック装置１Ｗは、上述のチャック装置１と同様に、図２２に示すように、電動工具Ｋの先端に装備されるものであり、図２２乃至図２４に示すように、主要部品であるチャック機構１０Ｗに、ロックベアリング３０Ｗが組み付けられたロック・解除機構２０Ｗを組み付けて構成している。　
　チャック機構１０Ｗは、ボディ１１Ｗと、ジョー１２とで構成している。 Like the chuck device 1 described above, the chuck device 1W is installed at the tip of the power tool K as shown in FIG. 22. As shown in FIGS. A lock/release mechanism 20W to which a lock bearing 30W is attached is attached to 10W.
The chuck mechanism 10W is composed of a body 11W and jaws 12. As shown in FIG.
　ボディ１１Ｗは、上述のボディ１１と同様に、基端側Ｂから、後胴部１１１、中胴部１１２、前胴部１１３とで構成し、中心に軸心方向Ｘの挿入孔１１４を有する略円筒形状に形成し、ボディ１１Ｗにおける周方向の三ケ所に、フランジ部を有する中胴部１１２から前胴部１１３を介し、外周側から内周側に向かい、軸心方向Ｘに対して交叉する方向で挿入孔１１４に連通するジョー装着孔１１５を配置している。なお、３つのジョー装着孔１１５の径内側方向の延長線上の交点は軸心方向Ｘ上となるように形成している。　
　上述のボディ１１と異なり、ボディ１１Ｗは、後述するバックスリーブ２１Ｗの内側円筒部２１３Ｗと嵌合する軸方向に延びるスプラインが後胴部１１１の外周面に形成されている。 Similar to the body 11 described above, the body 11W is composed of a rear body portion 111, a middle body portion 112, and a front body portion 113 from the base end side B, and has an insertion hole 114 extending in the axial direction X at the center. It is formed in a cylindrical shape and has flange portions at three locations in the circumferential direction of the body 11W. A jaw mounting hole 115 is arranged to communicate with the insertion hole 114 in the direction. It should be noted that the three jaw mounting holes 115 are formed such that the intersections of extension lines in the radially inner direction are on the axial direction X. As shown in FIG.
Unlike the body 11 described above, the body 11W has an axially extending spline formed on the outer peripheral surface of the rear body portion 111 to fit with an inner cylindrical portion 213W of a back sleeve 21W described later.
　上述のように構成したボディ１１Ｗのジョー装着孔１１５にジョー１２を挿入してチャック機構１０Ｗを構成する。このとき、ジョー１２は、ネジ溝１２１が径外側向きとなるように、ジョー装着孔１１５に挿入される。 The chuck mechanism 10W is configured by inserting the jaws 12 into the jaw mounting holes 115 of the body 11W configured as described above. At this time, the jaw 12 is inserted into the jaw mounting hole 115 so that the screw groove 121 faces radially outward.
　ロックベアリング３０Ｗは、図２３乃至図２８に示すように、上述のチャック装置１のロックベアリング３０と異なり軸心方向Ｘの基端側Ｂから先端側Ｆに向かって順に、ロックリング３２Ｚ、弾性リング３５、アウターリング３１Ｚ、ボール３３、及びスプリングリング３４Ｗで構成している。 As shown in FIGS. 23 to 28, unlike the lock bearing 30 of the chuck device 1 described above, the lock bearing 30W has a lock ring 32Z and an elastic ring arranged in order from the base end side B toward the distal end side F in the axial direction X. 35, an outer ring 31Z, a ball 33, and a spring ring 34W.
　つまり、ロックベアリング３０Ｗは、上述のチャック装置１のロックベアリング３０と異なり、アウターリング３１Ｚの基端側Ｂにロックリング３２Ｚが配置されるとともに、ロックリング３２Ｚとアウターリング３１Ｚとの間に弾性リング３５が備えられている。 That is, unlike the lock bearing 30 of the chuck device 1 described above, the lock bearing 30W has the lock ring 32Z disposed on the base end side B of the outer ring 31Z, and an elastic ring between the lock ring 32Z and the outer ring 31Z. 35 are provided.
　ロックリング３２Ｚは、上述の説明通りの構成であり、アウターリング３１Ｚの大まかな構成は、上述の説明通りの構成であるため、その説明を省略する。ただ、ロックベアリング３０Ｗに用いるアウターリング３１Ｚにおいて、噛合溝３１５Ｚギア歯は径外側が先端側Ｆに向かって傾斜するとともに、噛合溝３１５Ｚのギア歯の頂部における径内側を、図２３のａ部拡大図に示すように、後方リング面３１２の面に略並行なフラット面３１７を設けている。 The configuration of the lock ring 32Z is as described above, and the general configuration of the outer ring 31Z is as described above, so description thereof will be omitted. However, in the outer ring 31Z used for the lock bearing 30W, the radially outer side of the meshing groove 315Z gear teeth is inclined toward the tip end side F, and the radially inner side of the top of the gear tooth of the meshing groove 315Z is enlarged as shown in FIG. As shown, a flat surface 317 is provided generally parallel to the plane of the rear ring surface 312 .
　スプリングリング３４Ｗは、上述のチャック装置１におけるスプリングリング３４と同様に、中央開口３４１を有する前方リング面３４２、先端に半円タブ３４７（３４７Ｒ，３４７Ｌ）及びラチェット爪３４８（３４８Ｒ，３４８Ｌ）を有するスプリングアーム３４６が反時計回り方向Ｌ及び時計回り方向Ｒに設けられた連結バネ片３４５Ｗを有する前方突出部３４４を備えているが、連結バネ片３４５Ｗの先端側Ｆに第２半円タブ３４９を備えている。 The spring ring 34W has a front ring surface 342 with a central opening 341, semicircular tabs 347 (347R, 347L) at the tip, and ratchet pawls 348 (348R, 348L), similar to the spring ring 34 in the chuck device 1 described above. A spring arm 346 has a forward protrusion 344 having a connecting spring piece 345W provided in the counterclockwise direction L and the clockwise direction R. A second semicircular tab 349 is provided on the distal end side F of the connecting spring piece 345W. I have.
　詳述すると、連結バネ片３４５Ｗの先端側Ｆにおいて、反時計回り方向Ｌから時計回り方向Ｒに延びるとともに、径外側に突な半円状の第２半円タブ３４９を備えている。第２半円タブ３４９はＲ側半円タブ３４７Ｒと同じ向きで配置されている。 More specifically, the distal end side F of the connecting spring piece 345W is provided with a semicircular second semicircular tab 349 that extends from the counterclockwise direction L to the clockwise direction R and protrudes radially outward. The second semicircular tab 349 is arranged in the same direction as the R side semicircular tab 347R.
　また、先端側Ｆに第２半円タブ３４９を設けた連結バネ片３４５Ｗは、上述のチャック装置１のスプリングリング３４における連結バネ片３４５Ｗと同様に、後述するナットリング２２Ｗと嵌合するとともに、第２半円タブ３４９を支持するねじりバネとして機能することとなる。 A connecting spring piece 345W having a second semicircular tab 349 on the distal end side F is fitted with a nut ring 22W, which will be described later, similarly to the connecting spring piece 345W of the spring ring 34 of the chuck device 1 described above. It functions as a torsion spring that supports the second semicircular tab 349 .
　弾性リング３５は、弾性樹脂で構成された断面円形のリング体であり、ロックリング３２Ｚとアウターリング３１Ｚの外径と略同径の外径で形成され、ロックリング３２Ｚとアウターリング３１Ｚと間に配置される。 The elastic ring 35 is a ring body made of elastic resin and having a circular cross section. placed.
　そのため、回転固定タブ３２３によってボディ１１Ｗに回転方向が規制されたロックリング３２Ｚとアウターリング３１Ｚとが弾性リング３５の弾性力に抗して反時計回り方向Ｌに近接し、ロックリング３２Ｚの先端側Ｆに形成された噛合ギア３２４Ｚと、アウターリング３１Ｚの基端側Ｂに形成された噛合溝３１５Ｚとが噛合して、ロックリング３２Ｚを介してボディ１１Ｗに対してアウターリング３１Ｚの回転方向が規制されるロックベアリング３０Ｗにおいて、弾性リング３５の弾性力によってロックリング３２Ｚに対してアウターリング３１Ｚを離間させて、噛合ギア３２４Ｚと噛合溝３１５Ｚとの噛合を解消することができる。 Therefore, the lock ring 32Z and the outer ring 31Z whose rotational direction is restricted to the body 11W by the rotation fixing tab 323 come close to each other in the counterclockwise direction L against the elastic force of the elastic ring 35, and the front end side of the lock ring 32Z. A meshing gear 324Z formed on F and a meshing groove 315Z formed on the base end side B of the outer ring 31Z mesh with each other to restrict the rotational direction of the outer ring 31Z with respect to the body 11W via the lock ring 32Z. In the locked lock bearing 30W, the elastic force of the elastic ring 35 separates the outer ring 31Z from the lock ring 32Z to disengage the meshing gear 324Z and the meshing groove 315Z.
　上述のように構成したロックリング３２Ｚ、弾性リング３５、アウターリング３１Ｚ、ボール３３、及びスプリングリング３４Ｗを組み付けてロックベアリング３０Ｗを構成している。　
　具体的には、ロックリング３２Ｚのリング本体３２２の先端側Ｆの面に形成した噛合ギア３２４Ｚと、アウターリング３１Ｚの後方リング面３１２Ｚの基端側Ｂの面に形成した噛合溝３１５Ｚとが対向するように、ロックリング３２Ｚとアウターリング３１Ｚとを配置する。このとき、ロックリング３２Ｚとアウターリング３１Ｚとの間に弾性リング３５を配置する。 The lock bearing 30W is constructed by assembling the lock ring 32Z, the elastic ring 35, the outer ring 31Z, the balls 33, and the spring ring 34W configured as described above.
Specifically, the meshing gear 324Z formed on the front end side F surface of the ring main body 322 of the lock ring 32Z and the meshing groove 315Z formed on the base end side B surface of the rear ring surface 312Z of the outer ring 31Z face each other. The lock ring 32Z and the outer ring 31Z are arranged so as to do. At this time, an elastic ring 35 is arranged between the lock ring 32Z and the outer ring 31Z.
　そして、アウターリング３１Ｚの先端側Ｆに複数のボール３３を配置し、その先端側Ｆからスプリングリング３４Ｗを組み付ける。　
　詳しくは、アウターリング３１Ｚの先端側Ｆに配置された複数のボール３３の径内側及び先端側Ｆを内周面３４３が跨ぐようにスプリングリング３４Ｗを配置する。このとき、連結バネ片３４５Ｗのスプリングアーム３４６の先端に設けたラチェット爪３４８が、アウターリング３１Ｚの外周側面３１３の内面に形成したラチェットギア３１４とが係止するように組み付けてロックベアリング３０Ｗの組み付けは完了する。 A plurality of balls 33 are arranged on the tip side F of the outer ring 31Z, and the spring ring 34W is assembled from the tip side F thereof.
Specifically, the spring ring 34W is arranged so that the inner peripheral surface 343 straddles the radially inner side and the tip side F of the plurality of balls 33 arranged on the tip side F of the outer ring 31Z. At this time, the ratchet pawl 348 provided at the tip of the spring arm 346 of the connecting spring piece 345W is engaged with the ratchet gear 314 formed on the inner surface of the outer peripheral side surface 313 of the outer ring 31Z, and the lock bearing 30W is assembled. is completed.
　なお、このように組み付けられたロックベアリング３０Ｗは、ラチェット爪３４８がともにラチェットギア３１４に係止すると、アウターリング３１Ｚに対してスプリングリング３４Ｗは時計回り方向Ｒにも反時計回り方向Ｌにも相対回転できず、ラチェットギア３１４へのラチェット爪３４８の係止が解消すると、ボール３３によってアウターリング３１Ｚに対してスプリングリング３４Ｗは時計回り方向Ｒにも反時計回り方向Ｌにもスムーズに相対回転することができる。 In the lock bearing 30W assembled in this way, when both the ratchet pawl 348 is engaged with the ratchet gear 314, the spring ring 34W is relative to the outer ring 31Z in both the clockwise direction R and the counterclockwise direction L. When the latching of the ratchet pawl 348 to the ratchet gear 314 is released, the ball 33 causes the spring ring 34W to smoothly rotate relative to the outer ring 31Z in the clockwise direction R and the counterclockwise direction L. be able to.
　そして、ロックベアリング３０Ｗは、Ｌ側ラチェット爪３４８Ｌはラチェットギア３１４に係止しないが、Ｒ側ラチェット爪３４８Ｒがラチェットギア３１４に係止すると、アウターリング３１Ｚに対してスプリングリング３４Ｗは時計回り方向Ｒには相対回転できず、反時計回り方向Ｌにはスムーズに相対回転することができる。 In the lock bearing 30W, the L-side ratchet pawl 348L does not engage with the ratchet gear 314, but when the R-side ratchet pawl 348R engages with the ratchet gear 314, the spring ring 34W rotates clockwise relative to the outer ring 31Z. can rotate smoothly in the counterclockwise direction L.
　逆に、ロックベアリング３０Ｗは、Ｒ側ラチェット爪３４８Ｒはラチェットギア３１４に係止しないが、Ｌ側ラチェット爪３４８Ｌがラチェットギア３１４に係止すると、アウターリング３１Ｚに対してスプリングリング３４Ｗは反時計回り方向Ｌには相対回転できず、時計回り方向Ｒにはスムーズに相対回転することができる。 Conversely, in the lock bearing 30W, the R side ratchet pawl 348R does not engage with the ratchet gear 314, but when the L side ratchet pawl 348L engages with the ratchet gear 314, the spring ring 34W rotates counterclockwise with respect to the outer ring 31Z. Relative rotation in the direction L is not possible, but relative rotation in the clockwise direction R can be performed smoothly.
　ロック・解除機構２０Ｗは、バックスリーブ２１Ｗ、ナットリング２２Ｗ、インナースリーブ２３Ｗ、アウタースリーブ２４Ｗ、及び上述のロックベアリング３０Ｗで構成され、上述のロック・解除機構２０と異なり、ノーズピース２５を備えていない。　
　さらに詳しくは、ロック・解除機構２０Ｗは、図２３乃至図２５に示すように、上述のロックベアリング３０Ｗと、ロックベアリング３０Ｗより軸心方向Ｘの基端側Ｂに図示するバックスリーブ２１Ｗと、ロックベアリング３０Ｗより軸心方向Ｘの先端側Ｆに図示するナットリング２２Ｗ、インナースリーブ２３Ｗ、及びアウタースリーブ２４Ｗで構成している。 The lock/release mechanism 20W is composed of a back sleeve 21W, a nut ring 22W, an inner sleeve 23W, an outer sleeve 24W, and the lock bearing 30W described above. .
More specifically, as shown in FIGS. 23 to 25, the lock/release mechanism 20W includes the lock bearing 30W described above, a back sleeve 21W shown on the base end side B in the axial direction X from the lock bearing 30W, and a lock A nut ring 22W, an inner sleeve 23W, and an outer sleeve 24W shown in the figure are arranged on the tip end side F in the axial direction X from the bearing 30W.
　バックスリーブ２１Ｗは、チャック装置１Ｗの背面を構成し、ボディ１１Ｗの後胴部１１１の挿入を許容する円形開口２１１を有するリング本体２１２Ｗと、円形開口２１１を形成するリング本体２１２Ｗの内周縁において軸心方向Ｘの先端側Ｆに突出する内側円筒部２１３Ｗと、リング本体２１２Ｗの外周縁において軸心方向Ｘの先端側Ｆに突出する外側円筒部２１４Ｗとで構成している。 The back sleeve 21W includes a ring main body 212W that constitutes the back surface of the chuck device 1W, has a circular opening 211 that allows insertion of the rear body portion 111 of the body 11W, and an inner peripheral edge of the ring main body 212W that forms the circular opening 211. It is composed of an inner cylindrical portion 213W protruding to the tip side F in the axial direction X and an outer cylindrical portion 214W protruding to the tip side F in the axial direction X at the outer peripheral edge of the ring main body 212W.
　内側円筒部２１３Ｗは、ボディ１１Ｗの後胴部１１１に圧入可能な内径で形成するとともに、外側円筒部２１４Ｗより１／３倍程度の高さで形成している。　
　内側円筒部２１３Ｗより３倍程度の高さで形成した外側円筒部２１４Ｗの軸心方向Ｘの先端側Ｆの端部は、外径側が階段状となるように縮径された縮径端部２１４Ｗａを構成している。 The inner cylindrical portion 213W has an inner diameter that allows it to be press-fitted into the rear body portion 111 of the body 11W, and has a height about 1/3 times that of the outer cylindrical portion 214W.
The end portion of the outer cylindrical portion 214W, which is formed to be about three times as high as the inner cylindrical portion 213W, on the tip side F in the axial direction X is a diameter-reduced end portion 214Wa whose diameter is reduced so that the outer diameter side has a stepped shape. constitutes
　ナットリング２２Ｗは、上述のナットリング２２と同様の構成であり、円錐台状の円錐台状開口２２１を有するリング状であるリング本体２２２で構成し、リング本体２２２の先端側Ｆの面には、後述するインナースリーブ２３Ｗの差動凸部２３１が周方向に遊嵌できる凹状の差動凹部２２３を周方向に所定間隔を隔てて三ケ所形成している。 The nut ring 22W has the same configuration as the nut ring 22 described above, and is composed of a ring-shaped ring body 222 having a truncated cone-shaped opening 221. Three concave differential concave portions 223 are formed at predetermined intervals in the circumferential direction so that differential convex portions 231 of an inner sleeve 23W, which will be described later, can be loosely fitted in the circumferential direction.
　リング本体２２２の外周面に、ナットリング２２と同様に、連結凹部２２４Ｗが前方突出部３４４に対応する箇所に三ケ所形成している。　
　連結凹部２２４Ｗは、ナットリング２２の連結凹部２２４と同様に、上述のスプリングリング３４Ｗの前方突出部３４４の連結バネ片３４５Ｗの嵌合を許容する径方向内側に凹状となるが、周方向の中央に向かって徐々に凹み、底部が先端側Ｆから視てＶ字状となる凹状に形成している。 Three connection recesses 224W are formed on the outer peripheral surface of the ring body 222 at locations corresponding to the forward protrusions 344, similarly to the nut ring 22. As shown in FIG.
Like the connecting recess 224 of the nut ring 22, the connecting recess 224W is recessed radially inward to allow the fitting of the connecting spring piece 345W of the forward projecting portion 344 of the spring ring 34W. The bottom is formed in a V-shaped concave shape when viewed from the tip end side F. As shown in FIG.
　また、円錐台状開口２２１を形成するリング本体２２２の内面には、ジョー１２のネジ溝１２１が噛合する螺旋状の嵌合ネジ溝（図示省略）を形成している。なお、嵌合ネジ溝は、上述したジョー１２のネジ溝１２１に対応した螺旋角度で形成するとともに、複数周分の螺旋長さで形成している。 Further, on the inner surface of the ring body 222 forming the truncated cone-shaped opening 221, a helical fitting screw groove (not shown) with which the screw groove 121 of the jaw 12 meshes is formed. The fitting thread groove is formed at a spiral angle corresponding to the thread groove 121 of the jaw 12 described above, and is formed with a spiral length corresponding to a plurality of turns.
　上述のように構成されたナットリング２２Ｗは、図２６及び図２７に示すように、上述のロックベアリング３０Ｗと組み付けられる。　
　詳しくは、ロックベアリング３０Ｗに組み付けられたスプリングリング３４Ｗの前方突出部３４４の連結バネ片３４５Ｗが、先端側Ｆに配置されたナットリング２２Ｗの連結凹部２２４Ｗに挿入されて、スプリングリング３４Ｗとナットリング２２Ｗとが連結される。 The nut ring 22W configured as described above is assembled with the lock bearing 30W described above, as shown in FIGS.
Specifically, the connecting spring piece 345W of the forward protruding portion 344 of the spring ring 34W assembled to the lock bearing 30W is inserted into the connecting recess 224W of the nut ring 22W arranged on the tip side F, and the spring ring 34W and the nut ring are inserted. 22W are connected.
　このようにしてロックベアリング３０Ｗと組み付けられたナットリング２２Ｗは、スプリングリング３４Ｗと回転方向が固定される。　
　また、先端側Ｆから視て底部が略Ｖ字状となる連結凹部２２４Ｗに嵌合された連結バネ片３４５Ｗの先端側Ｆに設けた第２半円タブ３４９は、図２７に示すように、ナットリング２２Ｗより先端側Ｆに突出することとなる。 The nut ring 22W assembled with the lock bearing 30W in this manner is fixed in the rotational direction with the spring ring 34W.
As shown in FIG. 27, the second semicircular tab 349 provided on the distal end side F of the connecting spring piece 345W fitted in the connecting concave portion 224W having a substantially V-shaped bottom when viewed from the distal end side F is It protrudes to the tip side F from the nut ring 22W.
　そして、連結バネ片３４５Ｗが嵌合された連結凹部２２４Ｗの底部は先端側Ｆから視て略Ｖ字状に形成されているため、連結バネ片３４５Ｗの径内側に空間が形成される。そのため、第２半円タブ３４９に径内側向きの外力が作用すると、第２半円タブ３４９が先端側Ｆに設けられた連結バネ片３４５Ｗがねじり変形することができる。そのため、第２半円タブ３４９には、連結バネ片３４５Ｗのねじり変形が復元しようとする付勢力が作用することとなる。 Since the bottom of the connecting recess 224W into which the connecting spring piece 345W is fitted is formed in a substantially V shape when viewed from the tip side F, a space is formed radially inside the connecting spring piece 345W. Therefore, when a radially inward external force acts on the second semicircular tab 349, the connecting spring piece 345W provided on the distal end side F of the second semicircular tab 349 can be torsionally deformed. Therefore, an urging force acts on the second semicircular tab 349 to restore the torsional deformation of the connecting spring piece 345W.
　インナースリーブ２３Ｗは、後述するアウタースリーブ２４Ｗに軸心方向Ｘの基端側Ｂより嵌め込んで内包される、アウタースリーブ２４Ｗよりひとまわり小さな側筒状であり、反時計回り方向Ｌの長さがアウタースリーブ２４Ｗより半分程度の長さで形成されている。そして、ボディ１１Ｗの中胴部１１２に外嵌するように装着される。　
　なお、上述のインナースリーブ２３に設けた差動凸部２３１及び案内溝２３２（２３２Ｒ，２３２Ｌ）は後述するアウタースリーブ２４Ｗに差動凸部２４３及び案内溝２４２（２４２Ｒ，２４２Ｌ）として、設けている。 The inner sleeve 23W has a cylindrical shape that is slightly smaller than the outer sleeve 24W. It is formed with a length about half that of the outer sleeve 24W. Then, it is mounted so as to be fitted onto the middle body portion 112 of the body 11W.
The differential convex portion 231 and the guide grooves 232 (232R, 232L) provided on the inner sleeve 23 described above are provided as a differential convex portion 243 and the guide grooves 242 (242R, 242L) on the outer sleeve 24W, which will be described later. .
　アウタースリーブ２４Ｗは、内部に軸心方向Ｘの基端側Ｂからのインナースリーブ２３Ｗの嵌め込みを許容する、インナースリーブ２３Ｗよりひとまわり大きく、後端側がバックスリーブ２１Ｗの外周側の外側円筒部２１４Ｗと同径であり、先端開口部２４１を有する先端側が絞られた側面視略釣鐘型の筒状に形成している。 The outer sleeve 24W is slightly larger than the inner sleeve 23W and allows the inner sleeve 23W to be fitted therein from the base end side B in the axial direction X. It has the same diameter, and is formed in a substantially bell-shaped tubular shape in a side view with a narrowed tip side having a tip opening 241 .
　アウタースリーブ２４Ｗには、上述したように、上述のインナースリーブ２３に備えた差動凸部２３１に対応する差動凸部２４３を備えるとともに、インナースリーブ２３に備えた案内溝２３２に対応する案内溝２４２を備え、さらには、第２半円タブ３４９を案内する第２案内溝２４４を設けている。 As described above, the outer sleeve 24W is provided with the differential projections 243 corresponding to the differential projections 231 provided on the inner sleeve 23 and guide grooves corresponding to the guide grooves 232 provided on the inner sleeve 23. 242, and a second guide groove 244 for guiding the second semi-circular tab 349 is provided.
　詳しくは、アウタースリーブ２４Ｗの基端側Ｂから視た図である図２８（ａ）に示すように、軸心方向Ｘの中央より先端側Ｆの内周側に、基端側Ｂに向かって突出し、ナットリング２２Ｗの先端側Ｆの面に形成した差動凹部２２３に遊嵌する差動凸部２４３を周方向に所定間隔を隔てて三ケ所形成している。 Specifically, as shown in FIG. 28A, which is a view of the outer sleeve 24W from the proximal side B, the inner peripheral side of the distal side F from the center in the axial direction X, toward the proximal side B. Three differential projections 243 projecting and loosely fitted in the differential recesses 223 formed on the surface of the front end side F of the nut ring 22W are formed at three locations in the circumferential direction at predetermined intervals.
　また、差動凸部２４３より基端側Ｂの内周面には、上述の前方突出部３４４の半円タブ３４７が係止する案内溝２４２（２４２Ｒ，２４２Ｌ）を設けている。　
　案内溝２４２は、上述のインナースリーブ２３の案内溝２３２と同様に、Ｒ側スプリングアーム３４６ＲのＲ側半円タブ３４７Ｒが嵌合し、案内する時計回り方向Ｒに配置されたＲ側案内溝２４２Ｒと、Ｌ側スプリングアーム３４６ＬのＬ側半円タブ３４７Ｌが嵌合し、案内する反時計回り方向Ｌに配置されたＬ側案内溝２４２Ｌとを設けている。 Further, guide grooves 242 (242R, 242L) for locking the semicircular tabs 347 of the forward projecting portion 344 are provided on the inner peripheral surface on the base end side B from the differential convex portion 243 .
Similar to the guide groove 232 of the inner sleeve 23 described above, the guide groove 242 is an R-side guide groove 242R arranged in the clockwise direction R in which the R-side semicircular tab 347R of the R-side spring arm 346R is fitted and guided. and an L-side guide groove 242L arranged in the counterclockwise direction L to which the L-side semicircular tab 347L of the L-side spring arm 346L is fitted and guided.
　Ｒ側案内溝２４２Ｒは、Ｒ側案内溝２３２Ｒと同様に、Ｒ側案内溝２４２Ｒのうち反時計回り方向Ｌに配置され、係止したＲ側半円タブ３４７Ｒが径外側となる深溝部２４２Ｒａと、Ｒ側案内溝２４２Ｒのうち時計回り方向Ｒに配置され、係止するＲ側半円タブ３４７Ｒが径内側に付勢される浅溝部２４２Ｒｂと、深溝部２４２Ｒａにおける反時計回り方向Ｌに形成された面取溝部２４２Ｒｃとがある。 Like the R-side guide groove 232R, the R-side guide groove 242R is arranged in the counterclockwise direction L of the R-side guide groove 242R, and has a deep groove portion 242Ra where the locked R-side semicircular tab 347R is radially outside. , a shallow groove portion 242Rb arranged in the clockwise direction R in the R-side guide groove 242R and engaging the R-side semicircular tab 347R to be urged radially inward, and a deep groove portion 242Ra formed in the counterclockwise direction L. There is a chamfered groove portion 242Rc.
　Ｌ側半円タブ３４７Ｌを案内する反時計回り方向ＬのＬ側案内溝２４２Ｌは、Ｒ側案内溝２４２Ｒと同様に、Ｌ側案内溝２４２Ｌのうち反時計回り方向Ｌに配置され、係止したＬ側半円タブ３４７Ｌが径外側となる深溝部２４２Ｌａと、Ｌ側案内溝２４２Ｌのうち時計回り方向Ｒに配置され、係止するＬ側半円タブ３４７Ｌが径内側に付勢される浅溝部２４２Ｌｂと、深溝部２４２Ｌａにおける反時計回り方向Ｌに形成された面取溝部２４２Ｌｃとがある。 The L-side guide groove 242L in the counterclockwise direction L that guides the L-side semicircular tab 347L is arranged in the counterclockwise direction L in the L-side guide groove 242L and locked, similarly to the R-side guide groove 242R. A deep groove portion 242La in which the L-side semicircular tab 347L is radially outward, and a shallow groove portion disposed in the clockwise direction R in the L-side guide groove 242L and in which the L-side semicircular tab 347L to be engaged is biased radially inward. 242Lb and a chamfered groove portion 242Lc formed in the counterclockwise direction L in the deep groove portion 242La.
　なお、係止した半円タブ３４７が径内側に付勢される浅溝部２４２Ｒｂ，２４２Ｌｂ及び面取溝部２４２Ｒｃは、組み付け状態において、係止した半円タブ３４７が径内側に付勢されることで、半円タブ３４７と並設されたラチェット爪３４８が、アウターリング４３Ｚのラチェットギア３１４から径内側に離間し、ラチェットギア３１４との噛合が解消される位置まで移動する深さで形成している。 The shallow groove portions 242Rb and 242Lb and the chamfered groove portion 242Rc to which the locked semicircular tab 347 is urged radially inwardly are urged radially inwardly in the assembled state. , the semicircular tab 347 and the ratchet pawl 348 arranged side by side are spaced radially inward from the ratchet gear 314 of the outer ring 43Z, and are formed to a depth that moves to a position where the engagement with the ratchet gear 314 is released. .
　また、深溝部２４２Ｌａと浅溝部２４２Ｌｂとの周方向の間隔、及び浅溝部２４２Ｒｂと面取溝部２４２Ｒｃとの周方向の間隔は、ナットリング２２Ｗの差動凹部２２３にインナースリーブ２３Ｗの差動凸部２４３が遊嵌する際の遊嵌量、つまり、ナットリング２２Ｗに対してインナースリーブ２３Ｗが周方向に差動回転する回転量に対応している。 In addition, the circumferential distance between the deep groove portion 242La and the shallow groove portion 242Lb and the circumferential distance between the shallow groove portion 242Rb and the chamfered groove portion 242Rc are equal to the differential convex portion of the inner sleeve 23W and the differential concave portion 223 of the nut ring 22W. 243 is loosely fitted, that is, the rotation amount of the inner sleeve 23W differentially rotated in the circumferential direction with respect to the nut ring 22W.
　また、面取溝部２４２Ｒｃと深溝部２４２Ｌａとの周方向の間隔、及び浅溝部２４２Ｒｂと浅溝部２４２Ｌｂとの周方向の間隔は、前方突出部３４４に備えた時計回り方向ＲのＲ側半円タブ３４７Ｒと反時計回り方向ＬのＲ側半円タブ３４７Ｒとの周方向間隔に対応して形成している。 In addition, the circumferential distance between the chamfered groove portion 242Rc and the deep groove portion 242La and the circumferential distance between the shallow groove portion 242Rb and the shallow groove portion 242Lb are determined by the R-side semicircular tab in the clockwise direction R provided in the front projection portion 344. 347R and the R-side semicircular tab 347R in the counterclockwise L direction.
　したがって、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２４２Ｒの浅溝部２４２Ｒｂに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２４２Ｌの浅溝部２４２Ｌｂに係止することとなる。逆に、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２４２Ｒの面取溝部２４２Ｒｃに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２４２Ｌの深溝部２４２Ｌａに係止することとなる。 Therefore, in a state in which the R-side semicircular tab 347R in the clockwise direction R is engaged with the shallow groove portion 242Rb of the R-side guide groove 242R, the L-side semicircular tab 347L in the counterclockwise direction L is not in the shallow position of the L-side guide groove 242L. It will be locked to the groove portion 242Lb. Conversely, when the R-side semicircular tab 347R in the clockwise direction R is engaged with the chamfered groove portion 242Rc of the R-side guide groove 242R, the L-side semicircular tab 347L in the counterclockwise direction L is locked to the deep groove portion 242La.
　なお、時計回り方向ＲのＲ側半円タブ３４７ＲがＲ側案内溝２４２Ｒの深溝部２４２Ｒａに係止した状態では、反時計回り方向ＬのＬ側半円タブ３４７ＬはＬ側案内溝２４２Ｌの深溝部２４２Ｌａと浅溝部２４２Ｌｂとの間に案内されることとなる。 Note that when the R-side semicircular tab 347R in the clockwise direction R is engaged with the deep groove portion 242Ra of the R-side guide groove 242R, the L-side semicircular tab 347L in the counterclockwise direction L is the deep groove of the L-side guide groove 242L. It is guided between the portion 242La and the shallow groove portion 242Lb.
　第２半円タブ３４９を案内する第２案内溝２４４は、周方向に間隔を隔てて配置され、係止した第２半円タブ３４９が径外側となる２つの深溝部２４４ａと、反時計回り方向Ｌ側の深溝部２４４ａにおける反時計回り方向Ｌに形成された面取溝部２４４ｂと、２つの深溝部２４４ａの間において径内側に凸となる円弧状の凸溝部２４４ｃとがある。　
　そして、第２案内溝２４４は、２つの深溝部２４４ａ、面取溝部２４４ｂ及び凸溝部２４４ｃとで略フタコブ状に連続して一体化された溝形状で形成している。 The second guide grooves 244 for guiding the second semicircular tabs 349 are arranged at intervals in the circumferential direction, and have two deep groove portions 244a on which the locked second semicircular tabs 349 are located on the radially outer side. There is a chamfered groove portion 244b formed in the counterclockwise direction L in the deep groove portion 244a on the direction L side, and an arc-shaped convex groove portion 244c that protrudes radially inward between the two deep groove portions 244a.
The second guide groove 244 is formed in a groove shape in which two deep groove portions 244a, a chamfered groove portion 244b, and a convex groove portion 244c are continuously integrated in a substantially hump shape.
　以下の説明において、アウタースリーブ２４Ｗの内部にインナースリーブ２３Ｗが挿入されたものをスリーブ２３Ｗ，２４Ｗとして説明する。　
　なお、インナースリーブ２３Ｗとアウタースリーブ２４Ｗとは、上述のように別体構成したものを組み付けてもよいが、一体的に形成されていてもよい。 In the following description, sleeves 23W and 24W are defined as sleeves 23W and 24W in which the inner sleeve 23W is inserted inside the outer sleeve 24W.
In addition, the inner sleeve 23W and the outer sleeve 24W may be assembled separately as described above, but they may be integrally formed.
　各要素をこのように構成したチャック装置１Ｗは、まずボディ１１Ｗの後胴部１１１を円形開口２１１に挿入するようにして、バックスリーブ２１Ｗを軸心方向Ｘの基端側Ｂからボディ１１Ｗに装着する。なお、内面を後胴部１１１の外面と略同径に形成した内側円筒部２１３Ｗを後胴部１１１に圧入して装着するため、バックスリーブ２１Ｗは、ボディ１１Ｗに対して軸心方向Ｘ及び回転方向ともに固定された状態で装着される。 In the chuck device 1W having each element configured as described above, the back sleeve 21W is attached to the body 11W from the base end side B in the axial direction X by first inserting the rear body portion 111 of the body 11W into the circular opening 211. do. In addition, since the inner cylindrical portion 213W, whose inner surface is formed to have approximately the same diameter as the outer surface of the rear body portion 111, is press-fitted into the rear body portion 111, the back sleeve 21W can rotate in the axial direction X and rotate with respect to the body 11W. It is mounted in a fixed state in both directions.
　ジョー装着孔１１５にジョー１２を挿入したボディ１１Ｗの先端側Ｆから、ナットリング２２Ｗを組み付けたロックベアリング３０Ｗを装着し、全部のジョー１２のネジ溝１２１と、上述のようにロックベアリング３０Ｗに組み付けたナットリング２２Ｗの嵌合ネジ溝とを螺合させながら、ボディ１１Ｗに対してロックベアリング３０Ｗを装着する。このとき、ロックベアリング３０Ｗを構成するロックリング３２Ｚの回転固定タブ３２３は、中胴部１１２に形成した固定凹部１１２ａに係止するため、ロックリング３２Ｚは、ボディ１１Ｗに対して回転固定されている。 The lock bearing 30W with the nut ring 22W assembled is attached from the tip side F of the body 11W where the jaw 12 is inserted into the jaw attachment hole 115, and the screw grooves 121 of all the jaws 12 and the lock bearing 30W are attached as described above. The lock bearing 30W is attached to the body 11W while screwing it into the fitting screw groove of the nut ring 22W. At this time, since the rotation fixing tabs 323 of the lock ring 32Z constituting the lock bearing 30W are engaged with the fixing recesses 112a formed in the middle body portion 112, the lock ring 32Z is rotationally fixed with respect to the body 11W. .
　さらに、インナースリーブ２３Ｗを内部に圧入して一体化したアウタースリーブ２４Ｗを、上述したようにナットリング２２Ｗを組み付けたロックベアリング３０Ｗを装着したボディ１１Ｗの先端側Ｆから挿入する。 Further, the outer sleeve 24W integrated by press-fitting the inner sleeve 23W inside is inserted from the front end side F of the body 11W to which the lock bearing 30W with the nut ring 22W is mounted as described above.
　このとき、インナースリーブ２３Ｗの案内溝２３２にロックベアリング３０Ｗのスプリングリング３４Ｗの半円タブ３４７が係止するとともに、ナットリング２２Ｗの差動凹部２２３にインナースリーブ２３Ｗの差動凸部２３１が遊嵌するように挿着して、チャック装置１Ｗの組み付けを完了する。　
　なお、アウターリング３１Ｚのラチェットギア３１４と、スプリングリング３４Ｗのラチェット爪３４８とが係止していてもよい。 At this time, the semicircular tab 347 of the spring ring 34W of the lock bearing 30W is engaged with the guide groove 232 of the inner sleeve 23W, and the differential projection 231 of the inner sleeve 23W is loosely fitted into the differential recess 223 of the nut ring 22W. Then, the assembly of the chuck device 1W is completed.
The ratchet gear 314 of the outer ring 31Z and the ratchet pawl 348 of the spring ring 34W may be locked.
　このとき、ロックリング３２Ｚの噛合ギア３２４とアウターリング３１Ｚの噛合溝３１５とは噛合していない。つまり、ボディ１１Ｗに対して回転固定されたロックリング３２Ｚとアウターリング３１Ｚは噛合していないため、アウターリング３１Ｚはボディ１１Ｗに対する回転が規制されていない状態（非噛合状態）となる。この状態はいわゆる通常状態となる。 At this time, the meshing gear 324 of the lock ring 32Z and the meshing groove 315 of the outer ring 31Z are not meshed. That is, since the lock ring 32Z and the outer ring 31Z, which are rotationally fixed to the body 11W, do not mesh with each other, the rotation of the outer ring 31Z with respect to the body 11W is not restricted (unengaged state). This state is a so-called normal state.
　このように、構成するとともに組み付けたチャック装置１Ｗは、ボディ１１Ｗの挿入孔１１４に、先端側Ｆから回転治具５の基軸５ａを挿入するとともに、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転する。これにより、スプリングアーム３４６の付勢力で半円タブ３４７が案内溝２３２に係止しているため、ナットリング２２Ｗが時計回り方向Ｒに回転する。 In the chuck device 1W constructed and assembled in this manner, the base shaft 5a of the rotating jig 5 is inserted from the distal end side F into the insertion hole 114 of the body 11W, and the sleeves 23W and 24W are rotated in the clockwise direction R. . As a result, the nut ring 22W rotates clockwise because the semicircular tab 347 is engaged with the guide groove 232 by the biasing force of the spring arm 346 .
　ナットリング２２Ｗが時計回り方向Ｒに回転すると、ナットリング２２Ｗの嵌合ネジ溝にネジ溝１２１が螺合する３本のジョー１２は、同期しながら、ジョー装着孔１１５を傾斜方向に進行し、挿入孔１１４に挿入された回転治具５の基軸５ａを周方向における三方向から把持して固定することができる。 When the nut ring 22W rotates in the clockwise direction R, the three jaws 12 whose thread grooves 121 are screwed into the fitting thread grooves of the nut ring 22W move in the inclined direction through the jaw mounting holes 115 while synchronizing. The base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 can be gripped and fixed from three circumferential directions.
　なお、このとき、ロック・解除機構２０Ｗは、前回の使用状態によって、例えば、図２９に示すロック解除状態である。　
　図２９に示すロック解除状態では、図２９（ａ）のａ部拡大図及びｂ部拡大図に示すように、Ｒ側半円タブ３４７ＲもＬ側半円タブ３４７Ｌも浅溝部２４２Ｒｂ，２４２Ｌｂに位置しており、ラチェット爪３４８がラチェットギア３１４に噛合していない状態である。 At this time, the locking/unlocking mechanism 20W is in the unlocked state shown in FIG. 29, for example, according to the previous state of use.
In the unlocked state shown in FIG. 29, both the R-side semicircular tab 347R and the L-side semicircular tab 347L are positioned in the shallow grooves 242Rb and 242Lb, as shown in the enlarged view of part a and the enlarged view of part b in FIG. 29(a). , and the ratchet pawl 348 is not meshing with the ratchet gear 314 .
　このとき、第２案内溝２４４に係止している第２半円タブ３４９は、図２９（ｃ）のｃ部拡大図に示すように、時計回り方向Ｒの深溝部２４４ａに位置している。　
　また、ナットリング２２Ｗの差動凹部２２３に嵌め込まれた差動凸部２４３は、差動凹部２２３において反時計回り方向Ｌの位置に配置されている。 At this time, the second semicircular tab 349 engaged with the second guide groove 244 is positioned in the deep groove portion 244a in the clockwise direction R, as shown in the enlarged view of c in FIG. 29(c). .
Further, the differential protrusion 243 fitted in the differential recess 223 of the nut ring 22W is arranged at a position in the counterclockwise direction L in the differential recess 223 .
　この状態で、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転させると、第２半円タブ３４９が時計回り方向Ｒの深溝部２４４ａに位置しているスプリングリング３４Ｗを介して、ナットリング２２Ｗが時計回り方向Ｒに回転する。 In this state, when the sleeves 23W and 24W are rotated in the clockwise direction R, the second semicircular tab 349 moves clockwise through the spring ring 34W positioned in the deep groove portion 244a in the clockwise direction R. It rotates in the turning direction R.
　ナットリング２２Ｗが時計回り方向Ｒに回転すると、リング本体２２２の内面に形成された嵌合ネジ溝がジョー１２のネジ溝１２１と噛合しているため、３本のジョー１２を、同期させながらジョー装着孔１１５を傾斜方向に進行させる。 When the nut ring 22W rotates in the clockwise direction R, the three jaws 12 are synchronously rotated because the fitting thread groove formed on the inner surface of the ring body 222 is engaged with the thread groove 121 of the jaw 12. The mounting hole 115 is advanced in the oblique direction.
　スリーブ２３Ｗ，２４Ｗの時計回り方向Ｒの回転を続け、３本のジョー１２が同期してジョー装着孔１１５を進行して挿入孔１１４に挿入された回転治具５の基軸５ａを周方向における三方向から把持することになる。 As the sleeves 23W and 24W continue to rotate in the clockwise direction R, the three jaws 12 synchronously advance through the jaw mounting holes 115 and rotate the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114 in three circumferential directions. It will be grasped from the direction.
　挿入孔１１４に挿入された基軸５ａを３本のジョー１２で把持すると、ジョー１２はジョー装着孔１１５で進行できなくなるため、さらなるスリーブ２３Ｗ，２４Ｗの時計回り方向Ｒの回転によって、ナットリング２２Ｗ及びロックベアリング３０Ｗは、基軸５ａを把持するジョー１２を反力として基端側Ｂに向かって移動する。 When the three jaws 12 grip the base shaft 5a inserted into the insertion hole 114, the jaws 12 cannot advance through the jaw mounting hole 115. Therefore, further rotation of the sleeves 23W, 24W in the clockwise direction R causes the nut ring 22W and The lock bearing 30W moves toward the base end side B using the jaw 12 gripping the base shaft 5a as a reaction force.
　ナットリング２２Ｗ及びロックベアリング３０Ｗが基端側Ｂに移動すると、弾性リング３５によってロックリング３２Ｚの噛合ギア３２４Ｚに対して反時計回り方向Ｌに離間していたアウターリング３１Ｚの噛合溝３１５Ｚが、弾性リング３５の弾性力に抗して近接して噛合する。　
　回転固定タブ３２３によってボディ１１Ｗに回転方向が固定されているロックリング３２Ｚの噛合ギア３２４Ｚとアウターリング３１Ｚの噛合溝３１５Ｚとが噛合すると、ラチェットギア３１４を有するアウターリング３１Ｚはボディ１１に対して回転が固定されることとなる。 When the nut ring 22W and the lock bearing 30W move to the base end side B, the meshing groove 315Z of the outer ring 31Z, which is separated in the counterclockwise direction L from the meshing gear 324Z of the lock ring 32Z by the elastic ring 35, is elastically moved. The elastic force of the ring 35 is resisted and meshed closely.
When the meshing gear 324Z of the lock ring 32Z whose rotational direction is fixed to the body 11W by the rotation fixing tab 323 meshes with the meshing groove 315Z of the outer ring 31Z, the outer ring 31Z having the ratchet gear 314 rotates with respect to the body 11. will be fixed.
　また、挿入孔１１４に挿入された基軸５ａを３本のジョー１２で把持すると、ジョー１２はジョー装着孔１１５で進行できなくなるため、さらにスリーブ２３Ｗ，２４Ｗが時計回り方向Ｒに回転しても、ナットリング２２Ｗは回転できず、スリーブ２３Ｗ，２４Ｗは、図３０に示すように、ナットリング２２Ｗに対して時計回り方向Ｒに差動回転する。 Further, when the base shaft 5a inserted into the insertion hole 114 is gripped by the three jaws 12, the jaws 12 cannot advance through the jaw mounting hole 115. Therefore, even if the sleeves 23W and 24W rotate in the clockwise direction R, The nut ring 22W cannot rotate, and the sleeves 23W, 24W differentially rotate in the clockwise direction R with respect to the nut ring 22W, as shown in FIG.
　スリーブ２３Ｗ，２４Ｗが、回転できないナットリング２２Ｗに対して時計回り方向Ｒに差動回転すると、半円タブ３４７は、図３０（ａ）におけるａ部拡大図及びｂ部拡大図に示すように、深溝部２４２Ｒａ，２４２Ｌａに位置することとなり、ラチェット爪３４８がラチェットギア３１４に係止して、ロック状態となる。 When the sleeves 23W and 24W are differentially rotated in the clockwise direction R with respect to the non-rotatable nut ring 22W, the semicircular tabs 347, as shown in the enlarged view of part a and the enlarged view of part b in FIG. The ratchet pawl 348 is engaged with the ratchet gear 314 to be locked.
　このロック状態では、ボディ１１Ｗに回転が固定されたラチェットギア３１４に対してラチェット爪３４８が係止しているため、ナットリング２２Ｗ及びスプリングリング３４Ｗは相対回転できない状態となる。 In this locked state, the ratchet pawl 348 is engaged with the ratchet gear 314 whose rotation is fixed to the body 11W, so the nut ring 22W and the spring ring 34W cannot rotate relative to each other.
　また、スリーブ２３Ｗ，２４Ｗが、回転できないナットリング２２Ｗに対して時計回り方向Ｒに差動回転することで、図３０（ｂ）に示すように、差動凹部２２３に遊嵌された差動凸部２４３は時計回り方向Ｒに移動するものの、リング本体２２２の端面２２２ａとは当接していない状態となる。 Further, the sleeves 23W and 24W differentially rotate in the clockwise direction R with respect to the nut ring 22W, which cannot be rotated, so that the differential convexity loosely fitted in the differential concave portion 223 as shown in FIG. Although the portion 243 moves in the clockwise direction R, it is not in contact with the end surface 222a of the ring main body 222 .
　さらに、上記スリーブ２３Ｗ，２４Ｗの差動回転によって、第２半円タブ３４９は、図３０（ｂ）のｃ部拡大図に示すように、第２案内溝２４４において、凸溝部２４４ｃを乗り越え、反時計回り方向Ｌの深溝部２４４ａに位置することとなる。 Further, by differentially rotating the sleeves 23W and 24W, the second semicircular tab 349 climbs over the convex groove portion 244c in the second guide groove 244, as shown in the enlarged view of c part of FIG. It is located in the deep groove portion 244a in the clockwise direction L.
　さらに、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転すると、図３１に示すように、ロック状態のナットリング２２Ｗに対して、スリーブ２３Ｗ，２４Ｗが時計回り方向Ｒに差動回転する。　
　スリーブ２３Ｗ，２４Ｗが時計回り方向Ｒに差動回転すると、案内溝２４２において半円タブ３４７は面取溝部２４２Ｒｃ，２４２Ｌｃに位置することとなる。 Further, when the sleeves 23W and 24W are rotated in the clockwise direction R, the sleeves 23W and 24W differentially rotate in the clockwise direction R with respect to the nut ring 22W in the locked state, as shown in FIG.
When the sleeves 23W and 24W differentially rotate in the clockwise direction R, the semicircular tabs 347 in the guide groove 242 are positioned in the chamfered groove portions 242Rc and 242Lc.
　半円タブ３４７は面取溝部２４２Ｒｃ，２４２Ｌｃに位置すると、半円タブ３４７Ｒ．３４７Ｌは径内側に移動するため、図３１（ａ）のａ部拡大図及びｂ部拡大図に示すように、ラチェット爪３４８も径内側に移動してラチェットギア３１４との係止が解消され、ロック解除状態となる。 When the semicircular tabs 347 are positioned at the chamfered grooves 242Rc and 242Lc, the semicircular tabs 347R. Since the 347L moves radially inward, the ratchet pawl 348 also moves radially inward and is disengaged from the ratchet gear 314, as shown in the enlarged view of part a and the enlarged view of part b in FIG. Unlocked.
　そして、スリーブ２３Ｗ，２４Ｗが、回転できないナットリング２２Ｗに対して時計回り方向Ｒに差動回転することで、図３１（ｂ）に示すように、差動凹部２２３に遊嵌された差動凸部２４３は時計回り方向Ｒに移動して、リング本体２２２の端面２２２ａと当接するため、ナットリング２２Ｗはスリーブ２３Ｗ，２４Ｗとともに時計回り方向Ｒに回転し、基軸５ａを把持するジョー１２をさらにジョー装着孔１１５を進行させて、より堅固に把持することができる。 By differentially rotating the sleeves 23W and 24W in the clockwise direction R with respect to the non-rotatable nut ring 22W, as shown in FIG. Since the portion 243 moves in the clockwise direction R and comes into contact with the end surface 222a of the ring body 222, the nut ring 22W rotates in the clockwise direction R together with the sleeves 23W and 24W, and the jaws 12 gripping the base shaft 5a are further moved to the jaws. The attachment hole 115 can be advanced to allow a firmer grip.
　なお、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転させる力を解消すると、半円タブ３４７を介してスプリングアーム３４６（３４６Ｒ，３４６Ｌ）の付勢力が面取溝部２４２Ｒｃ，２４２Ｌｃに作用して、スリーブ２３Ｗ，２４Ｗはナットリング２２Ｗに対して反時計回り方向Ｌに差動回転し、半円タブ３４７が深溝部２４２Ｒａ，２４２Ｌａに位置するロック状態（図３０に示す状態）となり、ジョー１２で基軸５ａを把持する状態が不用意に開放されることを防止できる。 When the force that rotates the sleeves 23W and 24W in the clockwise direction R is released, the biasing force of the spring arms 346 (346R and 346L) acts on the chamfered grooves 242Rc and 242Lc via the semicircular tab 347, 23W and 24W are differentially rotated in the counterclockwise direction L with respect to nut ring 22W, and semicircular tabs 347 are positioned in deep grooves 242Ra and 242La to enter a locked state (state shown in FIG. It is possible to prevent the gripping state from being released carelessly.
　なお、図３１に示すロック解除状態において、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転されてより堅固にジョー１２で基軸５ａを把持し、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転する力を解消した状態で、ラチェット爪３４８の少なくとも一方がラチェットギア３１４のギア頂部に位置すると、半円タブ３４７は径外側に移動できず、ロック解除状態が維持されるおそれがある。 In the unlocked state shown in FIG. 31, the sleeves 23W and 24W are rotated in the clockwise direction R so that the jaws 12 grip the base shaft 5a more firmly, and the force to rotate the sleeves 23W and 24W in the clockwise direction R is applied. If at least one of the ratchet pawls 348 is positioned at the gear top of the ratchet gear 314 in the released state, the semicircular tab 347 cannot move radially outward, and the unlocked state may be maintained.
　このように、ラチェット爪３４８の少なくとも一方がラチェットギア３１４のギア頂部に位置し、半円タブ３４７は径外側に移動できずに、ロック解除状態が維持されると、ジョー１２が基軸５ａを把持した状態でありながら、半円タブ３４７Ｒ．３４７Ｌが案内溝２４２に遊嵌された状態となり、スリーブ２３Ｗ，２４Ｗは時計回り方向Ｒ及びＬにガタツクこととなる。 In this manner, when at least one of the ratchet pawls 348 is positioned at the top of the ratchet gear 314 and the semicircular tab 347 cannot move radially outward and the unlocked state is maintained, the jaw 12 grips the base shaft 5a. semicircular tab 347R. 347L is loosely fitted in the guide groove 242, and the sleeves 23W and 24W rattle in the clockwise directions R and L.
　しかしながら、図３１（ｂ）のｃ部拡大図に示すように、第２半円タブ３４９は、第２案内溝２４４において反時計回り方向Ｌの深溝部２４４ａより反時計回り方向Ｌの面取溝部２４４ｂに位置している。つまり、第２半円タブ３４９は、面取溝部２４４ｂによって、連結バネ片３４５Ｗを捩って径内側に規制されている。 However, as shown in the enlarged view of part c in FIG. 244b. That is, the second semicircular tab 349 is restricted radially inward by twisting the connecting spring piece 345W by the chamfered groove portion 244b.
　このように、連結バネ片３４５Ｗを捩って径内側に規制された第２半円タブ３４９を介して、連結バネ片３４５Ｗが捩れを復元する方向の付勢力が凸溝部２４４ｃに作用し、第２半円タブ３４９が反時計回り方向Ｌの深溝部２４４ａに位置するまで、スリーブ２３Ｗ，２４Ｗが反時計回り方向Ｌに差動回転して、スリーブ２３Ｗ，２４Ｗが不自然にガタツクことを防止できる。 In this way, a biasing force in the direction of restoring the twist of the connecting spring piece 345W acts on the convex groove portion 244c through the second semicircular tab 349, which is restricted radially inwardly by twisting the connecting spring piece 345W. The sleeves 23W, 24W are differentially rotated in the counterclockwise direction L until the two semicircular tabs 349 are positioned in the deep groove portion 244a in the counterclockwise direction L, thereby preventing the sleeves 23W, 24W from unnaturally rattling. .
　なお、ラチェットギア３１４のギア頂部に位置したラチェット爪３４８Ｒ，３４８Ｌは、チャック装置１Ｗの使用などの際に生じる振動等の外力によってギア頂部からずれて、スプリングアーム３４６の付勢力により、堅固な把持状態が緩むことなく、直ちにラチェットギア３１４に係止して、図３０に示すロック状態となる。 The ratchet pawls 348R and 348L positioned at the gear top of the ratchet gear 314 are displaced from the gear top due to external forces such as vibrations generated when the chuck device 1W is used, etc. Without loosening the state, it is immediately engaged with the ratchet gear 314 and becomes the locked state shown in FIG.
　なお、上述したようにジョー１２で基軸５ａを堅固に把持したロック状態から、ジョー１２による基軸５ａの把持を解消するためには、スリーブ２３Ｗ，２４Ｗを反時計回り方向Ｌに回転すると、ボディ１１Ｗに回転が固定されたラチェットギア３１４にラチェット爪３４８が係止しているため、ナットリング２２Ｗは回転せず、スリーブ２３Ｗ，２４Ｗがナットリング２２Ｗに対して差動回転することとなり、図２９に示すロック解除状態となる。 As described above, in order to release the gripping of the base shaft 5a by the jaws 12 from the locked state in which the base shaft 5a is firmly gripped by the jaws 12, the sleeves 23W and 24W are rotated in the counterclockwise direction L to rotate the body 11W. Since the ratchet pawl 348 is engaged with the ratchet gear 314 fixed to rotate, the nut ring 22W does not rotate, and the sleeves 23W and 24W rotate differentially with respect to the nut ring 22W. It will be in the unlocked state shown.
　そうすると、基軸５ａを把持するジョー１２を反力としたナットリング２２Ｗ及びロックベアリング３０Ｗの基端側Ｂの移動も解消され、弾性リング３５の弾性力によって、ロックリング３２Ｚに対してアウターリング３１Ｚは先端側Ｆに離間し、アウターリング３１Ｚのボディ１１Ｗに対する回転固定も解消され、ナットリング２２Ｗを反時計回り方向Ｌに回転して、ジョー１２による基軸５ａの把持を解消することができる。 Then, the movement of the base end side B of the nut ring 22W and the lock bearing 30W against the reaction force of the jaw 12 gripping the base shaft 5a is also eliminated, and the elastic force of the elastic ring 35 causes the outer ring 31Z to move against the lock ring 32Z. The outer ring 31Z is separated from the body 11W, and the nut ring 22W is rotated in the counterclockwise direction L so that the grip of the base shaft 5a by the jaws 12 can be released.
　このように、チャック装置１Ｗは、上述のチャック装置１と同様の効果を奏するとともに、ナットリング２２Ｗとスリーブ２３Ｗ，２４Ｗとがいずれの相対回転位置であっても、第２案内溝２４４に第２半円タブ３４９が案内され、スリーブ２３Ｗ，２４Ｗがナットリング２２Ｗに対して差動回転して、確実に、ロック状態とすることができる。 In this way, the chuck device 1W has the same effect as the above-described chuck device 1, and the second guide groove 244 has the second guide groove 244 regardless of the relative rotation positions of the nut ring 22W and the sleeves 23W and 24W. A semicircular tab 349 is guided, and the sleeves 23W and 24W can be differentially rotated with respect to the nut ring 22W to ensure a locked state.
　詳述すると、スリーブ２３Ｗ，２４Ｗに第２案内溝２４４が設けられるとともに、第２案内溝２４４に案内される第２半円タブ３４９と、第２半円タブ３４９を第２案内溝２４４に押付ける連結バネ片３４５Ｗとがナットリング２２Ｗに取付けられ、第２案内溝２４４による第２半円タブ３４９の案内に伴ってスリーブ２３Ｗ，２４Ｗがナットリング２２Ｗに対して差動回転する。 More specifically, a second guide groove 244 is provided in the sleeves 23W and 24W, and a second semicircular tab 349 guided by the second guide groove 244 is pushed into the second guide groove 244. A connecting spring piece 345W is attached to the nut ring 22W, and the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W as the second semicircular tab 349 is guided by the second guide groove 244.
　したがって、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転入力し、挿入孔１１４に挿入された回転治具５の基軸５ａをジョー１２で把持した状態において、半円タブ３４７（３４７Ｒ，３４７Ｌ）が案内溝２４２（２４２Ｒ，２４２Ｌ）に案内されて、係止爪がラチェットギア３１４に係止してロック状態となるが、締付け状態におけるナットリング２２Ｗとスリーブ２３Ｗ，２４Ｗとの相対回転位置によっては半円タブ３４７（３４７Ｒ，３４７Ｌ）が案内溝２４２（２４２Ｒ，２４２Ｌ）に案内されきらず、ロック状態にならず、スリーブ２３Ｗ，２４Ｗスリーブに不自然なガタツキが生じる場合であっても、第２案内溝２４４に第２半円タブ３４９が案内されることで、スリーブ２３Ｗ，２４Ｗがナットリング２２Ｗに対して差動回転して、確実に、不自然なガタツキを防止することができる。 Therefore, when the sleeves 23W and 24W are rotated in the clockwise direction R and the jaw 12 grips the base shaft 5a of the rotary jig 5 inserted into the insertion hole 114, the semicircular tabs 347 (347R and 347L) are guided. Guided by the grooves 242 (242R, 242L), the locking pawl is locked to the ratchet gear 314 and locked. Even if the tabs 347 (347R, 347L) are not completely guided by the guide grooves 242 (242R, 242L) and are not locked, and the sleeves 23W, 24W unnaturally rattle, the second guide grooves 244 Since the second semicircular tab 349 is guided by the second semicircular tab 349, the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W, and unnatural backlash can be reliably prevented.
　つまり、スリーブ２３Ｗ，２４Ｗに設けられた第２案内溝２４４に、ナットリング２２Ｗに取付けられた第２半円タブ３４９が案内されることで、ナットリング２２Ｗに対するスリーブ２３Ｗ，２４Ｗの相対回転位置を位置決めして、確実に、不自然なガタツキを防止することができる。 That is, the second semicircular tabs 349 attached to the nut ring 22W are guided by the second guide grooves 244 provided in the sleeves 23W and 24W, thereby adjusting the relative rotational positions of the sleeves 23W and 24W with respect to the nut ring 22W. By positioning, it is possible to reliably prevent unnatural rattling.
　また、第２案内溝２４４は、溝深さが深い深溝部２４４ａと、溝深さが浅い面取溝部２４４ｂとを有するとともに、第２半円タブ３４９は、案内溝に向かって凸状となる円弧形状に形成され、第２案内溝２４４における面取溝部２４４ｂにある第２半円タブ３４９は、連結バネ片３４５Ｗの付勢力によって深溝部２４４ａに案内され、第２案内溝２４４にける面取溝部２４４ｂから深溝部２４４ａへの案内に伴ってスリーブ２３Ｗ，２４Ｗがナットリング２２Ｗに対して差動回転する。 The second guide groove 244 has a deep groove portion 244a with a large groove depth and a chamfered groove portion 244b with a shallow groove depth, and the second semi-circular tab 349 protrudes toward the guide groove. A second semicircular tab 349 formed in an arc shape and located in the chamfered groove portion 244b of the second guide groove 244 is guided to the deep groove portion 244a by the biasing force of the connecting spring piece 345W, and is chamfered in the second guide groove 244. As the sleeves 23W and 24W are guided from the groove portion 244b to the deep groove portion 244a, the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W.
　そのため、半円タブ３４７（３４７Ｒ，３４７Ｌ）が案内溝２４２（２４２Ｒ，２４２Ｌ）に案内されきらないナットリング２２Ｗとスリーブ２３Ｗ，２４Ｗとの相対回転位置において円弧形状に形成された第２半円タブ３４９を第２案内溝２４４の面取溝部２４４ｂから深溝部２４４ａに案内して、スリーブ２３Ｗ，２４Ｗをナットリング２２Ｗに対して差動回転させて、確実に、不自然なガタツキを防止することができる。 Therefore, the semicircular tabs 347 (347R, 347L) are not completely guided by the guide grooves 242 (242R, 242L), and the second semicircular tabs are formed in an arc shape at the relative rotational positions between the nut ring 22W and the sleeves 23W, 24W. 349 is guided from the chamfered groove portion 244b of the second guide groove 244 to the deep groove portion 244a, and the sleeves 23W and 24W are differentially rotated with respect to the nut ring 22W to reliably prevent unnatural rattling. can.
　また、連結バネ片３４５Ｗは、ねじりバネで構成されているため、コンパクトな連結バネ片３４５Ｗであっても強い付勢力を発揮することができる。したがって、第２案内溝２４４に対して第２半円タブ３４９を強い付勢力で付勢して、第２半円タブ３４９を第２案内溝２４４で確実に案内することができる。 In addition, since the connecting spring piece 345W is composed of a torsion spring, even the compact connecting spring piece 345W can exert a strong biasing force. Therefore, the second semi-circular tab 349 can be strongly urged against the second guide groove 244 and the second semi-circular tab 349 can be reliably guided by the second guide groove 244 .
　また、ナットリング２２Ｗに、ねじりバネで構成された連結バネ片３４５Ｗが変形できる連結凹部２２４Ｗが設けられているため、連結バネ片３４５Ｗが強い付勢力を発揮するためのねじり変形ができる。したがって、第２案内溝２４４に対して第２半円タブ３４９を強い付勢力で付勢して、第２半円タブ３４９を第２案内溝２４４で確実に案内することができる。 In addition, since the nut ring 22W is provided with a connection recess 224W in which the connection spring piece 345W made of a torsion spring can be deformed, the connection spring piece 345W can be torsionally deformed to exert a strong biasing force. Therefore, the second semi-circular tab 349 can be strongly urged against the second guide groove 244 and the second semi-circular tab 349 can be reliably guided by the second guide groove 244 .
　また、噛合溝３１５Ｚと噛合ギア３２４Ｚとを軸心方向Ｘに離間する方向に付勢する弾性リング３５が設けられているため、スリーブ２３Ｗ，２４Ｗの時計回り方向Ｒの回転入力による、基軸５ａを把持するジョー１２を反力としたナットリング２２Ｗの基端側Ｂへの移動によって噛合する噛合ギア３２４Ｚと噛合溝３１５Ｚとが、ジョー１２を反力としたナットリング２２Ｗの基端側Ｂへの移動が解消されると、噛合溝３１５Ｚと噛合ギア３２４Ｚとは軸心方向Ｘに離間するが、弾性リング３５の付勢力によってより確実に噛合溝３１５Ｚと噛合ギア３２４Ｚとを軸心方向Ｘに離間させることができる。したがって、ボディ１１Ｗに対するラチェットギア３１４の回転方向の固定を確実に解消することができる。 In addition, since the elastic ring 35 is provided to urge the meshing groove 315Z and the meshing gear 324Z in the axial direction X to separate them from each other, the rotation input of the sleeves 23W and 24W in the clockwise direction R rotates the base shaft 5a. The meshing gear 324Z and the meshing groove 315Z, which are meshed by the movement of the nut ring 22W toward the base end side B using the gripping jaw 12 as a reaction force, move the nut ring 22W toward the base end side B using the jaws 12 as a reaction force. When the movement is canceled, the meshing groove 315Z and the meshing gear 324Z are separated in the axial direction X, but the biasing force of the elastic ring 35 more reliably separates the meshing groove 315Z and the meshing gear 324Z in the axial direction X. can be made Therefore, fixing of the ratchet gear 314 to the body 11W in the rotational direction can be reliably eliminated.
　また、アウターリング３１Ｚの噛合溝３１５Ｚのギア歯における内径側にフラット面３１７が形成されているため、ロックリング３２Ｚの噛合ギア３２４Ｚと噛合溝３１５Ｚとの非噛合な近接状態において、噛合ギア３２４Ｚのギア溝と噛合溝３１５Ｚのギア歯とが干渉して干渉音が発生することを防止できる。 In addition, since the flat surface 317 is formed on the inner diameter side of the gear teeth of the meshing groove 315Z of the outer ring 31Z, when the meshing gear 324Z of the lock ring 32Z and the meshing groove 315Z are in non-meshing proximity, the meshing gear 324Z is Interference noise caused by interference between the gear groove and the gear teeth of the meshing groove 315Z can be prevented.
　詳述すると、スリーブ２３Ｗ，２４Ｗを時計回り方向Ｒに回転させ、挿入孔１１４に挿入された基軸５ａを把持したジョー１２を反力としたナットリング２２Ｗ及びロックベアリング３０Ｗの基端側Ｂへの移動によって、ボディ１１Ｗに回転固定されたロックリング３２Ｚの噛合ギア３２４Ｚのギア溝と、アウターリング３１Ｚの噛合溝３１５Ｚのギア歯とを噛合させ、半円タブ３４７が係止するラチェットギア３１４を有するアウターリング３１Ｚをボディ１１Ｗに対して回転固定する。 More specifically, the sleeves 23W and 24W are rotated in the clockwise direction R, and the nut ring 22W and the lock bearing 30W are moved toward the base end side B using the reaction force of the jaw 12 gripping the base shaft 5a inserted into the insertion hole 114. It has a ratchet gear 314 with which a semicircular tab 347 engages with the gear groove of the meshing gear 324Z of the lock ring 32Z rotationally fixed to the body 11W and the gear teeth of the meshing groove 315Z of the outer ring 31Z by movement. The outer ring 31Z is rotationally fixed with respect to the body 11W.
　噛合溝３１５Ｚのギア歯が径外側に向かって先端側Ｆに向かって傾斜するため、上述の噛合ギア３２４Ｚのギア溝と噛合溝３１５Ｚのギア歯とが噛合するまでのアウターリング３１Zとロックリング３２Ｚとが近接した状態において、噛合溝３１５Ｚのギア歯の径内側が噛合ギア３２４Ｚのギア溝と干渉して干渉音が発生するが、噛合溝３１５Ｚの径内側にフラット面３１７に設けているため、干渉音の発生を防止することができる。 Since the gear teeth of the meshing groove 315Z are radially outwardly inclined toward the distal end side F, the outer ring 31Z and the lock ring 32Z until the gear grooves of the meshing gear 324Z and the gear teeth of the meshing groove 315Z mesh with each other. are close to each other, the radial inner side of the gear teeth of the meshing groove 315Z interferes with the gear groove of the meshing gear 324Z to generate an interference sound. It is possible to prevent the generation of interference sound.
　なお、上述のチャック装置１Ｗの説明では、回転固定タブ３２３によってボディ１１Ｗに回転固定されたロックリング３２Ｚの噛合ギア３２４Ｚと、アウターリング３１Ｚの噛合溝３１５Ｚとを、基軸５ａを把持するジョー１２を反力として軸心方向Ｘに移動させて噛合させ、半円タブ３４７が係止するラチェットギア３１４を有するアウターリング３１Ｚをボディ１１Ｗに対して回転固定したが、図３２及び図３３に示すチャック装置１Ｖのように、ロックリング３２Ｚを備えず、アウターリング３１Ｚの代わりに回転固定タブ３１６によってボディ１１Ｗに対して回転を固定できるアウターリング３１Ｘを用いてもよい。 In the above description of the chuck device 1W, the engagement gear 324Z of the lock ring 32Z rotationally fixed to the body 11W by the rotation fixing tab 323, the engagement groove 315Z of the outer ring 31Z, and the jaw 12 for gripping the base shaft 5a. The outer ring 31Z having the ratchet gear 314 engaged with the semi-circular tab 347 is rotationally fixed to the body 11W by moving it in the axial direction X as a reaction force and engaging it, but the chuck device shown in FIG. 32 and FIG. As in 1V, the lock ring 32Z may not be provided, and instead of the outer ring 31Z, an outer ring 31X whose rotation can be fixed with respect to the body 11W by the rotation fixing tabs 316 may be used.
　チャック装置１Ｖは、ロックリング３２Ｚを備えないとともに、アウターリング３１Ｚの代わりにアウターリング３１Ｘを用いている以外はチャック装置１Ｗと同じ構成であり、チャック装置１Ｗ及びチャック装置１Ｘと同じ効果を奏することができる。 The chuck device 1V has the same configuration as the chuck device 1W except that the lock ring 32Z is not provided and the outer ring 31X is used instead of the outer ring 31Z, and the same effects as those of the chuck device 1W and the chuck device 1X are obtained. can be done.
　この発明の構成と、上述の実施形態との対応において、この発明の軸心は軸心方向Ｘに対応し、
以下同様に、
チャック装置はチャック装置１に対応し、
回転治具は回転治具５に対応し、
基軸は基軸５ａに対応し、
軸孔は挿入孔１１４に対応し、
チャック本体はボディ１１，１１Ｗに対応し、
傾斜孔はジョー装着孔１１５に対応し、
チャック爪はジョー１２に対応し、
回転入力体はスリーブ２３，２４，２３Ｗ，２４Ｗに対応し、
ナットリングはナットリング２２，２２Ｗに対応し、
回転伝達部は差動凸部２３１に対応し、
ロック手段はラチェットギア３１４及びラチェット爪３４８に対応し、
ロック解除手段は案内溝２３２及び半円タブ３４７に対応し、
締付け方向ロック手段はラチェットギア３１４及びＬ側ラチェット爪３４８Ｌに対応し、
緩み方向ロック手段はラチェットギア３１４及びＲ側ラチェット爪３４８Ｒに対応し、
締付け方向ロック解除手段はＬ側案内溝２３２Ｌ及びＬ側半円タブ３４７Ｌに対応し、
緩み方向ロック解除手段はＲ側案内溝２３２Ｒ及びＲ側半円タブ３４７Ｒに対応し、
係止溝はラチェットギア３１４に対応し、
係止爪はラチェット爪３４８に対応し、
固定手段はアウターリング３１及びロックリング３２に対応し、
固定ギア溝は噛合ギア３２４，３２４Ｚに対応し、
固定ギア歯は噛合溝３１５，３１５Ｚに対応し、
転動体はボール３３に対応し、
ベアリングはロックベアリング３０に対応し、
被案内部は半円タブ３４７に対応し、
案内溝は案内溝２３２に対応し、
フラット部はフラット面３１７に対応し、
付勢部はスプリングアーム３４６に対応し、
深溝部は深溝部２３２Ｒａ，２３２Ｌａ，２４２Ｒａ，２４２Ｌａ，２４４ａに対応し、
浅溝部は浅溝部２３２Ｒｂ，２３２Ｌｂ，２４２Ｒｂ，２４２Ｌｂ，面取溝部２４４ｂに対応し、
駆動装置はモータＭに対応し、
回転伝達手段はスピンドル４に対応し、
離間方向付勢手段は弾性リング３５に対応し、
第２案内溝は案内溝２４２に対応し、
第２被案内部は第２半円タブ３４９に対応し、
第２付勢部は連結バネ片３４５Ｗに対応し、
変形空間は連結凹部２２４Ｗに対応し、
電動工具は電動工具Ｋに対応応するも、
この発明は、上述の実施形態の構成のみに限定されるものではなく、多くの実施の形態を得ることができる。 In correspondence with the configuration of the present invention and the above-described embodiments, the axis of the present invention corresponds to the axial direction X,
and so on,
The chuck device corresponds to the chuck device 1,
The rotating jig corresponds to the rotating jig 5,
The base axis corresponds to the base axis 5a,
The shaft hole corresponds to the insertion hole 114,
The chuck body corresponds to bodies 11 and 11W,
The angled holes correspond to the jaw mounting holes 115,
The chuck claw corresponds to jaw 12,
The rotary input bodies correspond to the sleeves 23, 24, 23W and 24W,
The nut ring corresponds to nut ring 22, 22W,
The rotation transmission part corresponds to the differential convex part 231,
The locking means correspond to the ratchet gear 314 and the ratchet pawl 348,
The unlocking means correspond to the guide groove 232 and the semicircular tab 347,
The tightening direction locking means corresponds to the ratchet gear 314 and the L side ratchet pawl 348L,
The loosening direction locking means corresponds to the ratchet gear 314 and the R side ratchet pawl 348R,
The tightening direction unlocking means corresponds to the L side guide groove 232L and the L side semicircular tab 347L,
The loosening direction unlocking means corresponds to the R side guide groove 232R and the R side semicircular tab 347R,
The locking groove corresponds to the ratchet gear 314,
The locking pawl corresponds to the ratchet pawl 348,
The fixing means correspond to the outer ring 31 and the lock ring 32,
The fixed gear grooves correspond to the meshing gears 324 and 324Z,
The fixed gear teeth correspond to the mesh grooves 315 and 315Z,
The rolling elements correspond to the balls 33,
The bearing corresponds to the lock bearing 30,
The guided portion corresponds to the semicircular tab 347,
The guide groove corresponds to the guide groove 232,
The flat portion corresponds to the flat surface 317,
The biasing portion corresponds to the spring arm 346,
The deep groove portions correspond to the deep groove portions 232Ra, 232La, 242Ra, 242La and 244a,
The shallow groove portions correspond to the shallow groove portions 232Rb, 232Lb, 242Rb, 242Lb and the chamfered groove portion 244b,
The drive corresponds to the motor M,
The rotation transmission means corresponds to the spindle 4,
The separating direction biasing means corresponds to the elastic ring 35,
The second guide groove corresponds to the guide groove 242,
The second guided portion corresponds to the second semicircular tab 349,
The second biasing portion corresponds to the connecting spring piece 345W,
The deformation space corresponds to the connecting recess 224W,
Although the electric tool corresponds to the electric tool K,
The present invention is not limited to the configurations of the above-described embodiments, and many embodiments can be obtained.
　例えば、上述のチャック装置１は、回転可能なスピンドル４を有する電動工具Ｋのみならず、振動ドリルや電動ドライバ等の回転電動工具に装着してもよい。　
　また、上述のチャック装置１では、ナットリング２２に対するスリーブ２３，２４の反時計回り方向Ｌの差動回転により、Ｌ側ラチェット爪３４８Ｌ及びＲ側ラチェット爪３４８Ｒの両方がラチェットギア３１４との噛合を解消するように構成したが、ナットリング２２に対するスリーブ２３，２４の反時計回り方向Ｌの差動回転により、Ｌ側ラチェット爪３４８Ｌだけがラチェットギア３１４との噛合を解消するように構成してもよい。 For example, the chuck device 1 described above may be attached not only to the power tool K having the rotatable spindle 4, but also to a rotating power tool such as a vibrating drill or an electric driver.
In the chuck device 1 described above, both the L-side ratchet pawl 348L and the R-side ratchet pawl 348R engage with the ratchet gear 314 due to the differential rotation of the sleeves 23 and 24 relative to the nut ring 22 in the counterclockwise direction L. However, it is also possible to disengage only the L-side ratchet pawl 348L from the ratchet gear 314 by differentially rotating the sleeves 23, 24 relative to the nut ring 22 in the counterclockwise direction L. good.
　また、上述のチャック装置１，１Ｘ，１Ｙ，１Ｗ，１Ｖの説明では、スリーブ２３，２４のナットリング２２に対する時計回り方向Ｒ及び反時計回り方向Ｌの差動回転によって、Ｒ側ラチェット爪３４８Ｒ及びＬ側ラチェット爪３４８Ｌの両方のラチェットギア３１４への係止が解消されるように構成したが、スリーブ２３，２４のナットリング２２に対する時計回り方向Ｒの差動回転によって、Ｒ側ラチェット爪３４８Ｒのラチェットギア３１４への係止が解消され、反時計回り方向Ｌの差動回転によってＬ側ラチェット爪３４８Ｌのラチェットギア３１４への係止が解消されるように構成されてもよい。 In the description of the chuck devices 1, 1X, 1Y, 1W, and 1V described above, the differential rotation of the sleeves 23 and 24 in the clockwise direction R and the counterclockwise direction L with respect to the nut ring 22 causes the R side ratchet pawl 348R and Although the L-side ratchet pawl 348L is configured to be disengaged from both ratchet gears 314, the R-side ratchet pawl 348R is disengaged due to the differential rotation of the sleeves 23 and 24 relative to the nut ring 22 in the clockwise direction R. It may be configured such that locking to the ratchet gear 314 is released, and differential rotation in the counterclockwise direction L releases locking of the L-side ratchet pawl 348L to the ratchet gear 314 .
１，１Ｘ，１Ｙ…チャック装置
４…スピンドル
５…回転治具
５ａ…基軸
１１…ボディ
１２…ジョー
２２，２２Ｗ…ナットリング
２３…インナースリーブ
３０，３０Ｚ…ロックベアリング
３１，３１Ｘ，３１Ｚ…アウターリング
３２，３２Ｚ…ロックリング
３３…ボール
３５…弾性リング
１１４…挿入孔
１１５…ジョー装着孔
２２４Ｗ…連結凹部
２３１…差動凸部
２３２，２３２Ｙ，２４２…案内溝
２３２Ｒ，２３２ＹＲ，２４２Ｒ…Ｒ側案内溝
２３２Ｒａ，２３２Ｌａ，２４２Ｒａ，２４２Ｌａ，２４４ａ…深溝部
２３２Ｒｂ，２３２Ｌｂ，２４２Ｒｂ，２４２Ｌｂ，２４４ｂ…浅溝部
２３２Ｌ，２３２ＹＬ，２４２Ｌ…Ｌ側案内溝
３１４…ラチェットギア
３１５，３１５Ｚ…噛合溝
３１７…フラット面
３２４，３２４Ｚ…噛合ギア
３４５Ｗ…連結バネ片
３４６…スプリングアーム
３４７…半円タブ
３４７Ｒ…Ｒ側半円タブ
３４７Ｌ…Ｌ側半円タブ
３４８…ラチェット爪
３４８Ｒ…Ｒ側ラチェット爪
３４８Ｌ…Ｌ側ラチェット爪
３４９…第２半円タブ
Ｋ…電動工具
Ｍ…モータ
Ｘ…軸心方向
Ｒ…時計回り方向
Ｌ…反時計回り方向 Reference Signs List 1, 1X, 1Y Chuck device 4 Spindle 5 Rotating jig 5a Base shaft 11 Body 12 Jaws 22, 22W Nut ring 23 Inner sleeves 30, 30Z Lock bearings 31, 31X, 31Z Outer ring 32 , 32Z... Lock ring 33... Ball 35... Elastic ring 114... Insertion hole 115... Jaw mounting hole 224W... Connection concave part 231... Differential convex part 232, 232Y, 242... Guide groove 232R, 232YR, 242R... R side guide groove 232Ra , 232La, 242Ra, 242La, 244a Deep groove portions 232Rb, 232Lb, 242Rb, 242Lb, 244b Shallow groove portions 232L, 232YL, 242L L-side guide grooves 314 Ratchet gears 315, 315Z Engaging grooves 317 Flat surfaces 324, 324Z Engagement gear 345W Connection spring piece 346 Spring arm 347 Semicircular tab 347R R side semicircular tab 347L L side semicircular tab 348 Ratchet pawl 348R R side ratchet pawl 348L L side ratchet pawl 349 No. Two semicircular tabs K...Electric tool M...Motor X...Axial direction R...Clockwise direction L...Counterclockwise direction

Claims (15)

  1. 　軸心上で回転可能な駆動軸を有する駆動装置に装着するチャック装置であって、
    前記軸心上に配置され、先端側に回転治具の基軸の挿入を許容する軸孔を有する略円筒状のチャック本体と、
    　該チャック本体において、先端側で前記軸孔に連絡するとともに、後端側で前記チャック本体の側方に開口する傾斜孔に挿着され、前記チャック本体に対して移動可能に配置された複数のチャック爪と、
    　前記チャック本体に対して回転自在に装着するとともに、回転操作によって回転力を入力する回転入力体と、
    　前記チャック本体に回動可能に保持されるとともに、前記チャック本体及び前記チャック爪に対する螺合によって前記複数のチャック爪を同期して前記傾斜孔内を傾斜方向に移動させるナットリングと、
    　前記回転入力体の前記回転力を前記ナットリングに伝達する回転伝達部と、
    　前記チャック本体に対する前記ナットリングの回転を規制するロック手段と、
    　前記ロック手段による前記ナットリングの回転規制を解除するロック解除手段とが備えられ、
    　前記ロック手段は、締付け方向の回転を規制する締付け方向ロック手段と、緩み方向の回転を規制する緩み方向ロック手段とがあり、
    　前記ロック解除手段は、前記締付け方向ロック手段の回転規制を解除する締付け方向ロック解除手段と、前記緩み方向ロック手段の回転規制を解除する緩み方向ロック解除手段とがあり、
    　前記ロック手段は、
    前記チャック本体に設けられたギア状の係止溝と、
    前記ナットリングに取付けられ、前記係止溝に係止する係止爪とを有し、
    　前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、
    　前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除する
    チャック装置。     A chuck device to be mounted on a drive device having a drive shaft rotatable on the axis,
    a substantially cylindrical chuck body arranged on the axial center and having a shaft hole on the distal end side for allowing insertion of a base shaft of a rotary jig;
    In the chuck body, a plurality of chuck bodies are connected to the axial hole on the front end side and inserted into inclined holes that open to the sides of the chuck body on the rear end side, and are arranged movably with respect to the chuck body. chuck claws and
    a rotational input body that is rotatably mounted on the chuck body and receives a rotational force through a rotational operation;
    a nut ring that is rotatably held by the chuck body and that synchronously moves the plurality of chuck claws in the inclined hole in the inclined direction by being screwed into the chuck body and the chuck claws;
    a rotation transmission portion that transmits the rotational force of the rotational input body to the nut ring;
    locking means for restricting rotation of the nut ring with respect to the chuck body;
    a lock releasing means for releasing rotation restriction of the nut ring by the locking means;
    The lock means includes tightening direction lock means for restricting rotation in the tightening direction and loosening direction lock means for restricting rotation in the loosening direction,
    The lock release means includes a tightening direction lock release means for releasing rotation restriction of the tightening direction lock means and a loosening direction lock release means for releasing rotation restriction of the loosening direction lock means,
    The locking means
    a gear-shaped locking groove provided in the chuck body;
    a locking claw attached to the nut ring and locked to the locking groove;
    The tightening direction unlocking means releases rotation restriction of the tightening direction lock means by differential rotation in the tightening direction of at least the rotation input body and the nut ring,
    The loosening direction lock releasing means releases the rotation restriction of the loosening direction lock means by differential rotation of at least the rotation input body and the nut ring in the loosening direction.
  2. 　前記係止溝を、前記チャック本体に対して回転方向を固定する固定手段が設けられ、
    前記固定手段は、
    前記チャック本体に対して回転方向が固定された固定ギア溝と、
    前記係止溝に設けられ、前記固定ギア溝と軸心方向に噛合する固定ギア歯とを有し、
    　通常状態において、前記固定ギア溝と前記固定ギア歯とは非噛合状態であり、
    　前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって、前記固定ギア溝と前記固定ギア歯とが噛合して、前記固定ギア溝が前記チャック本体に対して固定される
    請求項１に記載のチャック装置。     fixing means for fixing the rotation direction of the locking groove with respect to the chuck body,
    The fixing means are
    a fixed gear groove whose rotational direction is fixed with respect to the chuck body;
    a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction;
    In a normal state, the fixed gear groove and the fixed gear tooth are in a disengaged state,
    The fixed gear groove and the fixed gear teeth are meshed by the movement of the nut ring to the base end side with the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotation input body. 2. The chuck device of claim 1, wherein said fixed gear groove is fixed with respect to said chuck body.
  3. 　軸心上で回転可能な駆動軸を有する駆動装置に装着するチャック装置であって、
    前記軸心上に配置され、先端側に回転治具の基軸の挿入を許容する軸孔を有する略円筒状のチャック本体と、
    　該チャック本体において、先端側で前記軸孔に連絡するとともに、後端側で前記チャック本体の側方に開口する傾斜孔に挿着され、前記チャック本体に対して移動可能に配置された複数のチャック爪と、
    　前記チャック本体に対して回転自在に装着するとともに、回転操作によって回転力を入力する回転入力体と、
    　前記チャック本体に回動可能に保持されるとともに、前記チャック本体及び前記チャック爪に対する螺合によって前記複数のチャック爪を同期して前記傾斜孔内を傾斜方向に移動させるナットリングと、
    　前記回転入力体の前記回転力を前記ナットリングに伝達する回転伝達部と、
    　前記チャック本体に対する前記ナットリングの回転を規制するロック手段と、
    　前記ロック手段による前記ナットリングの回転規制を解除するロック解除手段とが備えられ、
    　前記ロック手段は、締付け方向の回転を規制する締付け方向ロック手段と、緩み方向の回転を規制する緩み方向ロック手段とがあり、
    　前記ロック解除手段は、前記締付け方向ロック手段の回転規制を解除する締付け方向ロック解除手段と、前記緩み方向ロック手段の回転規制を解除する緩み方向ロック解除手段とがあり、
    　前記ロック手段は、
    前記チャック本体に設けられたギア状の係止溝と、
    前記ナットリングに取付けられ、前記係止溝に係止する係止爪とを有し、
    　前記係止溝を、前記チャック本体に対して回転方向を固定する固定手段が設けられ、
    前記固定手段は、
    前記チャック本体に対して回転方向が固定された固定ギア溝と、
    前記係止溝に設けられ、前記固定ギア溝と軸心方向に噛合する固定ギア歯とを有し、
    　前記回転入力体の前記締付け方向の回転入力による、前記基軸を把持する前記チャック爪を反力とした前記ナットリングの基端側への移動によって、前記固定ギア溝と前記固定ギア歯とが噛合して、前記固定ギア溝が前記チャック本体に対して固定されるとともに、
    　前記締付け方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記締付け方向の差動回転により、前記締付け方向ロック手段の回転規制を解除し、
    　前記緩み方向ロック解除手段は、少なくとも前記回転入力体と前記ナットリングとの前記緩み方向の差動回転により、前記緩み方向ロック手段の回転規制を解除する
    チャック装置。     A chuck device to be mounted on a drive device having a drive shaft rotatable on the axis,
    a substantially cylindrical chuck body arranged on the axial center and having a shaft hole on the distal end side for allowing insertion of a base shaft of a rotary jig;
    In the chuck body, a plurality of chuck bodies are connected to the axial hole on the front end side and inserted into inclined holes that open to the sides of the chuck body on the rear end side, and are arranged movably with respect to the chuck body. chuck claws and
    a rotational input body that is rotatably mounted on the chuck body and receives a rotational force through a rotational operation;
    a nut ring that is rotatably held by the chuck body and that synchronously moves the plurality of chuck claws in the inclined hole in the inclined direction by being screwed into the chuck body and the chuck claws;
    a rotation transmission portion that transmits the rotational force of the rotational input body to the nut ring;
    locking means for restricting rotation of the nut ring with respect to the chuck body;
    a lock releasing means for releasing rotation restriction of the nut ring by the locking means;
    The lock means includes tightening direction lock means for restricting rotation in the tightening direction and loosening direction lock means for restricting rotation in the loosening direction,
    The lock release means includes a tightening direction lock release means for releasing rotation restriction of the tightening direction lock means and a loosening direction lock release means for releasing rotation restriction of the loosening direction lock means,
    The locking means
    a gear-shaped locking groove provided in the chuck body;
    a locking claw attached to the nut ring and locked to the locking groove;
    fixing means for fixing the rotation direction of the locking groove with respect to the chuck body,
    The fixing means are
    a fixed gear groove whose rotational direction is fixed with respect to the chuck body;
    a fixed gear tooth provided in the locking groove and meshing with the fixed gear groove in the axial direction;
    The fixed gear groove and the fixed gear teeth are meshed by the movement of the nut ring to the base end side with the reaction force of the chuck claws that grip the base shaft due to the rotation input in the tightening direction of the rotation input body. Then, the fixed gear groove is fixed to the chuck body,
    The tightening direction unlocking means releases rotation restriction of the tightening direction lock means by differential rotation in the tightening direction of at least the rotation input body and the nut ring,
    The loosening direction lock releasing means releases the rotation restriction of the loosening direction lock means by differential rotation of at least the rotation input body and the nut ring in the loosening direction.
  4. 　前記固定ギア溝は、周方向且つ前記軸心方向に対して傾斜する帯状のリング体であり、
    前記周方向且つ前記軸心方向に対して傾斜する前記固定ギア溝と前記固定ギア歯とは非噛合状態であり、
    前記ナットリングの基端側への前記移動により、傾斜する前記固定ギア溝が捩れ変形して前記固定ギア溝と前記固定ギア歯とが噛合状態となる
    請求項２又は請求項３に記載のチャック装置。     The fixed gear groove is a belt-shaped ring body that is inclined with respect to the circumferential direction and the axial direction,
    the fixed gear grooves and the fixed gear teeth inclined with respect to the circumferential direction and the axial direction are in a non-meshing state;
    4. The chuck according to claim 2 or 3, wherein the movement of the nut ring to the base end side causes the inclined fixed gear groove to twist and deform so that the fixed gear groove and the fixed gear teeth are engaged with each other. Device.
  5. 　前記固定ギア歯のギア歯における内径側にフラット部が形成された
    請求項４に記載のチャック装置。     5. The chuck device according to claim 4, wherein a flat portion is formed on the inner diameter side of the gear teeth of the fixed gear teeth.
  6. 　前記固定ギア歯と前記固定ギア溝とを前記軸心方向に離間する方向に付勢する離間方向付勢手段が設けられた
    請求項２乃至請求項５のうちいずれかに記載のチャック装置。     6. The chuck device according to claim 2, further comprising separation direction biasing means for biasing said fixed gear teeth and said fixed gear grooves in a direction to separate them in said axial direction.
  7. 　軸心方向の先端側から基点側に向かって、前記ナットリング、前記固定ギア溝及び前記固定ギア歯の順で配置され、
    前記ナットリングと前記固定ギア溝との間に複数の転動体が設けられ、
    前記ナットリング、前記転動体、前記固定ギア溝及び前記固定ギア歯でベアリングが構成された
    請求項２乃至請求項４のうちいずれかに記載のチャック装置。     The nut ring, the fixed gear groove, and the fixed gear teeth are arranged in this order from the tip side in the axial direction toward the base point side,
    A plurality of rolling elements are provided between the nut ring and the fixed gear groove,
    5. The chuck device according to claim 2, wherein said nut ring, said rolling elements, said fixed gear grooves and said fixed gear teeth form a bearing.
  8. 　前記ロック解除手段は、
    前記回転入力体に設けられた案内溝と、
    前記ナットリングに取付けられ、前記案内溝に案内される被案内部を前記案内溝に押付ける付勢部とを有し、
    前記係止爪は、前記被案内部とともに案内される構成である
    請求項１乃至請求項７のうちいずれかに記載のチャック装置。     The unlocking means is
    a guide groove provided in the rotary input body;
    a biasing portion attached to the nut ring and pressing the guided portion guided by the guide groove against the guide groove;
    8. The chuck device according to any one of claims 1 to 7, wherein the locking claw is guided together with the guided portion.
  9. 　前記案内溝は、溝深さが深い深溝部と、溝深さが浅い浅溝部とを有し、
    前記被案内部が前記深溝部に案内されると、前記係止爪が前記係止溝に係止してロック状態となり、
    前記被案内部が前記浅溝部に案内されると、前記係止溝への前記係止爪の係止が解除してロック解除状態となる
    請求項８に記載のチャック装置。     The guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth,
    When the guided portion is guided to the deep groove portion, the locking pawl is locked to the locking groove to enter a locked state,
    9. The chuck device according to claim 8, wherein when the guided portion is guided to the shallow groove portion, the locking of the locking pawl to the locking groove is released to be in an unlocked state.
  10. 　前記被案内部は、前記案内溝に向かって凸状となる円弧形状であるとともに、前記深溝部と前記浅溝部とが周方向に所定間隔を隔てて配置され、
    前記被案内部が前記深溝部と前記浅溝部との間に当接する状態において、前記付勢部の付勢力によって、前記被案内部が前記深溝部か前記浅溝部のいずれかに案内される
    請求項９に記載のチャック装置。     The guided portion has an arc shape that protrudes toward the guide groove, and the deep groove portion and the shallow groove portion are arranged with a predetermined interval in the circumferential direction,
    In a state in which the guided portion abuts between the deep groove portion and the shallow groove portion, the guided portion is guided to either the deep groove portion or the shallow groove portion by the biasing force of the biasing portion. Item 9. The chuck device according to item 9.
  11. 　前記案内溝を第１案内溝、前記被案内部を第１被案内部、前記付勢部を第１付勢部とし、
    前記回転入力体に第２案内溝が設けられるとともに、
    前記第２案内溝に案内される第２被案内部と、前記第２被案内部を前記第２案内溝に押付ける第２付勢部とが前記ナットリングに取付けられ、
    前記第２案内溝による前記第２被案内部の案内に伴って前記回転入力体が前記ナットリングに対して差動回転する
    請求項８乃至請求項１０のうちいずれかに記載のチャック装置。     The guide groove is a first guide groove, the guided portion is a first guided portion, and the urging portion is a first urging portion,
    A second guide groove is provided in the rotary input body,
    A second guided portion guided by the second guide groove and a second biasing portion pressing the second guided portion against the second guide groove are attached to the nut ring,
    11. The chuck device according to any one of claims 8 to 10, wherein the rotational input body is differentially rotated with respect to the nut ring as the second guided portion is guided by the second guide groove.
  12. 　前記第２案内溝は、溝深さが深い深溝部と、溝深さが浅い浅溝部とを有するとともに、
    前記第２被案内部は、前記案内溝に向かって凸状となる円弧形状に形成され、
    前記第２案内溝における前記浅溝部にある前記第２被案内部は、第２付勢部の付勢力によって前記深溝部に案内され、
    前記第２案内溝にける前記浅溝部から前記深溝部への案内に伴って前記回転入力体が前記ナットリングに対して差動回転する
    請求項１１に記載のチャック装置。     The second guide groove has a deep groove portion with a deep groove depth and a shallow groove portion with a shallow groove depth,
    The second guided portion is formed in an arc shape that protrudes toward the guide groove,
    The second guided portion in the shallow groove portion of the second guide groove is guided to the deep groove portion by the biasing force of the second biasing portion,
    12. The chuck device according to claim 11, wherein the rotary input body is differentially rotated with respect to the nut ring as it is guided from the shallow groove portion to the deep groove portion in the second guide groove.
  13. 　前記第２付勢部は、ねじりバネで構成された
    請求項１１又は請求項１２に記載のチャック装置。     The chuck device according to claim 11 or 12, wherein the second biasing portion is composed of a torsion spring.
  14. 　前記ナットリングに、
    前記ねじりバネで構成された前記第２付勢部が変形できる変形空間が設けられた
    請求項１３に記載のチャック装置。     on the nut ring,
    14. The chuck device according to claim 13, wherein a deformation space is provided in which the second biasing portion formed by the torsion spring can be deformed.
  15. 　駆動装置と、該駆動装置の回転力を軸心上に伝達する回転伝達手段とが備えられるとともに、
    請求項１乃至請求項１４のうちいずれかに記載のチャック装置が前記回転伝達手段によって回転可能に備えられた
    電動工具。     A driving device and a rotation transmission means for transmitting the rotational force of the driving device on the axis are provided, and
    An electric power tool comprising the chuck device according to any one of claims 1 to 14 rotatable by said rotation transmission means.
PCT/JP2022/004879 2021-02-09 2022-02-08 Chuck device and electric tool WO2022172911A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2021018897 2021-02-09
JP2021-018897 2021-02-09
JP2021-112890 2021-07-07
JP2021112890A JP2022122236A (en) 2021-02-09 2021-07-07 Chuck device and electric power tool

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050258605A1 (en) * 2002-11-25 2005-11-24 Xingda Tan Self-locking drill chuck
US20060027979A1 (en) * 2004-08-03 2006-02-09 Yang Gui M Lockable chuck
JP2006055992A (en) * 2004-08-17 2006-03-02 Black & Decker Inc Keyless chuck with automatic and manual lock mechanism
WO2008122159A1 (en) * 2007-04-10 2008-10-16 Zhejiang Sanou Machinery Co., Ltd A self-locking hammer-drill chuck
US20100181735A1 (en) * 2009-01-19 2010-07-22 Zexin Zhou Force increasing self-locking drill chuck and self-locking mechanism thereof
JP2013255949A (en) * 2012-06-11 2013-12-26 Mura Technology:Kk Chuck device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050258605A1 (en) * 2002-11-25 2005-11-24 Xingda Tan Self-locking drill chuck
US20060027979A1 (en) * 2004-08-03 2006-02-09 Yang Gui M Lockable chuck
JP2006055992A (en) * 2004-08-17 2006-03-02 Black & Decker Inc Keyless chuck with automatic and manual lock mechanism
WO2008122159A1 (en) * 2007-04-10 2008-10-16 Zhejiang Sanou Machinery Co., Ltd A self-locking hammer-drill chuck
US20100181735A1 (en) * 2009-01-19 2010-07-22 Zexin Zhou Force increasing self-locking drill chuck and self-locking mechanism thereof
JP2013255949A (en) * 2012-06-11 2013-12-26 Mura Technology:Kk Chuck device

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