WO2007010711A1

WO2007010711A1 - Embroidery machine

Info

Publication number: WO2007010711A1
Application number: PCT/JP2006/312590
Authority: WO
Inventors: Toshiaki Osada
Original assignee: Nara Sewing Machine Industrial Co., Ltd.
Priority date: 2005-07-22
Filing date: 2006-06-23
Publication date: 2007-01-25
Also published as: JP2007029163A; JP3962750B2

Abstract

An embroidery machine (1), comprising a crochet hook (2) and a needle bar (16), an engagement part (21) capable of fixing the needle bar (16) in two directions different by 180° from each other, a looper (4) guiding a thread to the hook part (2a) of the crochet hook (2), a feed mechanism (5) moving a sewn article (A) in a prescribed feed direction (P), an orientation adjusting mechanism (6) capable of setting the feeding direction (P) of the feed mechanism, the orientation of the crochet hook (2), and the orientation of the looper (4) in synchronism with each other by reciprocatingly moving in the axial direction to rotate a spindle (15) transmitting a reciprocating motion (Q) to the looper (4) without allowing the spindle to be interlocked with the reciprocating motion (Q), and a looper orientation changeover part (7) capable of rotating the orientation of the looper (4) by 180° independently of the orientation adjusting mechanism (6).

Description

Technical field

[0001] The present invention relates to an embroidery sewing machine capable of chain stitching.

This application claims priority to Japanese Patent Application No. 2005-212947 filed on July 22, 2005, the contents of which are incorporated herein by reference.

Background art

[0002] When embroidering a workpiece, a sewing method called chain stitch has been conventionally used. This chain stitch is a sewing method in which a thread is sewn in an annular shape with a needle, and is performed using a needle having a hook (hook) called a hook needle. A part of the hook part is opened to be an opening part for inserting a thread, and the thread is applied to the thread holding part which is a space inside the hook part through the opening part for inserting the thread. The thread held by the thread is released from the thread holding part to the outside of the hook part through the thread insertion opening part. Furthermore, there are two typical sewing methods for chain stitches: moss stitches and chain stitches. In more detail, the moss stitch is as follows.

Pull up the thread that is engaged with the heel needle in a ring shape together with the heel needle to the lower surface force of the workpiece and remove it from the heel needle. Next, the needle is moved by a predetermined pitch or the workpiece is fed, the needle is passed from the upper surface to the lower surface of the workpiece, the thread is engaged again in an annular shape, and is pulled up from the lower surface to the upper surface.

By continuously performing this operation, a thread ring is formed at a predetermined pitch on the upper surface, which is called a moss stitch.

Also, after pulling up the thread that is annularly engaged with the heel needle to the lower surface force of the sewing object, without removing the thread from the heel needle, push the annular thread onto the upper surface of the object to be sewn with the heel needle without engaging the thread. . Then, the penetrating needle penetrates from the upper surface to the lower surface of the sewing product, and the intermediate force of the ring that has been pushed down as it is is pulled up, and the adjacent ring on the upper surface of the sewing product is pulled up. It becomes continuous while engaging in a chain, and this is called a chain stitch. The difference between these moss stitches and chain stitches is that the ring force pulled up on the upper surface of the work is effectively moved to the next pitch, and moved to the next pitch while being engaged. That is the difference. Further, structurally, if the open part for thread insertion of the heel needle is directed in the feed direction of the sewing product, the thread is removed and becomes a moth stitch, and if the opening part for thread insertion is directed in the reverse direction, When there is a needle on the top side, the thread is always engaged and a chain stitch is formed.

[0003] As sewing machines for performing such chain stitches, the following sewing machines have been proposed. For example, it has a hook needle that drives up and down, and a looper that is rotationally controlled in synchronism with the needle, and is connected to the control motor for rotating the looper, and the height position of the needle relative to the looper is optimal. A chain stitch sewing machine has been proposed that includes a control device that controls the control motor at the timing (see Patent Document 1, for example).

[0004] In contrast to the above, an embroidery sewing machine that performs conventional chain stitching! Has an annular feed frame that can vibrate up and down and in a predetermined feed direction so as to surround the periphery of the tip of the needle. The feed direction of this feed frame can be rotated 360 degrees freely by synchronizing it with the direction of the heel needle and the direction of the looper that rotates in synchronization with the heel needle below the heel needle. A handle embroidery sewing machine that can be embroidered has been proposed.

Patent Document 1: Japanese Patent Laid-Open No. 8-84880

Disclosure of the invention

Problems to be solved by the invention

[0005] While the force is applied, the direction of the heel needle in relation to the moving direction of the sewing product is always the direction corresponding to the moss stitch in the former patent document 1, and the direction of the heel needle is A method of switching to chain stitches with opposite orientation is disclosed.

[0006] Further, in the latter handle embroidery sewing machine, in order to support both moss stitch and chain stitch, it was necessary to switch the direction of the needle and the looper by 180 degrees while fixing the feed direction of the feed frame. . However, since this handle embroidery sewing machine allows embroidery by changing the direction freely in 360 degrees, the three rotational movements are synchronized so that the feed direction of the feed frame, the direction of the hook and the direction of the looper always coincide. The mechanism that drives them in conjunction with each other had to be released. For this reason, the needle or the needle bar that holds the needle is fixed. Loosen the fittings such as bolts and adjust by rotating 180 degrees visually. Furthermore, in the looper, the occlusion of the operating gear for transmitting the driving force from the driving unit is removed and rotated 180 degrees, or the operating gear attached to the driving unit is removed from the main shaft force and the looper is operated as the operating gear. And it was necessary to rotate it 180 degrees. However, the work of adjusting the direction of the needle or needle bar is inaccurate by visual inspection, and skill is required for the adjustment. Also, the work to rotate the direction of the looper 180 degrees is a work at the bottom of the machine body, and it is also a work to remove a precise and very small part called the looper or to remove and switch the operating gear, which requires skill. In addition, it was a time-consuming task. For this reason, in such a handle embroidery sewing machine, moss stitches and chain stitches can be freely handled only by skilled workers, and there are technical problems in safety when used in beginners and at home.

Means for solving the problem

[0007] The present invention has been made in view of the above circumstances, and provides an embroidery machine capable of easily and safely switching between two types of chain stitches, moss stitches and chain stitches, and methods. .

In order to solve the above problems, the present invention proposes the following means!

That is, the present invention includes a needle portion having a heel needle, a looper that guides a thread to the heel portion of the heel needle, a feed mechanism that moves a sewing product in a predetermined feed direction, and an axial direction of the needle portion of the heel needle The drive unit that synchronizes the reciprocating motion with respect to the actuator, the reciprocating rotational motion of the looper, and the vibratory motion of the feed mechanism, and two directions that differ by 180 degrees around the axis of the needle unit with respect to the drive unit And a looper direction switching unit capable of rotating the direction of the looper by 180 degrees, and the direction of the needle portion and the direction of the looper with respect to the feed direction of the feed mechanism This is an embroidery sewing machine in which two different kinds of chain stitches, chain stitch and moss stitch, can be made by rotating each of them 180 degrees.

[0009] According to the embroidery sewing machine according to the present invention, it is possible to accurately fix the needle portion to the engaging portion in two directions different by 180 degrees around the axis. In addition, the looper direction switching unit allows the direction of the looper to be rotated 180 degrees, so the direction of the hook and looper can be rotated 180 degrees while the feed direction of the feed mechanism is fixed, and chain stitching is possible. And moss Two types of chain stitches can be used.

[0010] Further, in the embroidery sewing machine according to the present invention, the main shaft of the drive unit that reciprocates in the axial direction and transmits the reciprocating motion to the looper is rotated without being interlocked with the reciprocating motion. There may be provided a direction adjustment mechanism that can set the feeding direction of the mechanism, the direction of the heel needle, and the direction of the looper in synchronization, and it is possible to freely change the sewing direction and perform chain stitching. .

[0011] According to the embroidery sewing machine according to the present invention, chain stitching can be performed by freely changing the sewing direction.

[0012] Further, in the embroidery sewing machine according to the present invention, the heel needle is formed with a thread insertion opening portion, and the needle portion is engaged with the engagement portion, and the thread insertion opening portion is provided on the feeding mechanism. The position in the feeding direction and the position where the thread insertion opening is directed in the direction opposite to the feeding direction of the feeding mechanism are fixed, and the looper has a through hole into which the thread is inserted. An engaging groove is formed in one end portion of the looper through a looper recess, and a thread is inserted into the through hole and pulled out of the looper from the recess to the engagement groove. When the looper direction switching unit rotates the direction of the looper by 180 degrees, the engagement groove is opposite to the feed direction of the feed mechanism and the feed direction of the feed mechanism. It ’s good!

[0013] According to the present invention, two types of chain stitches, chain stitch and moss stitch, can be performed by rotating the direction of the hook and the looper by 180 degrees while fixing the feed direction of the feed mechanism.

[0014] Further, in the embroidery sewing machine according to the present invention, the direction adjusting mechanism is fixedly fitted on the main shaft of the drive unit and a rotatable handle, a handle shaft for transmitting the rotation of the handle. A first cylindrical shaft having a slot that is movable in the axial direction and restricts rotation, is fitted on the main shaft, and is provided with a bevel gear at one end, and is rotatably fitted on the main shaft, A bevel gear is provided at one end facing the first cylindrical shaft, and a second cylindrical shaft provided with a gear for transmitting the rotation of the handle shaft is provided at the other end. Between the locking positions corresponding to each of the chain stitch and the moss stitch, a lever that can rotate, a lever shaft that transmits the rotation of the lever, and one end portion at the front The shaft is pivotally attached to the first cylindrical shaft, the other end is pivotally attached to the second cylindrical shaft, and the rotation of the lever shaft is transmitted to one of the ends. And a bevel gear of the first cylindrical shaft of the direction adjusting mechanism and the bevel gear of the second cylindrical shaft of the looper direction switching unit. It may be interlocked by meshing with a bevel gear rotatably mounted on the arm.

[0015] According to the embroidery sewing machine according to the present invention, if the lever of the looper direction switching portion is rotated, the rotation is transmitted to the lever axial force arm, and the arm moves between the first cylindrical shaft and the second cylindrical shaft. Rotate around the axis. As the arm rotates, the bevel gear attached to the arm also rotates while meshing with the bevel gear of the first cylindrical shaft and the bevel gear of the second cylindrical shaft. In other words, the second cylindrical shaft bevel gear is a fixed sun gear, and the bevel gear mounted on the arm is a planetary gear, and performs planetary motion around the second cylindrical shaft bevel gear. For this reason, as the arm rotates, the bevel gear of the arm rotates, and the bevel gear of the first cylindrical shaft rotates in conjunction with the sum of the rotation speed of the arm and the rotation speed of the arm bevel gear. By rotating the first cylindrical shaft, the first cylindrical shaft and the main shaft of the drive unit are relatively restricted in rotation by the restriction member and the elongated hole. Therefore, the main shaft of the drive unit also rotates, and the looper It is transmitted and rotates. By such a mechanism, if the lever is rotated by an angle corresponding to the rotation of the luno by 180 degrees, it is independent of the direction adjustment mechanism, and only the looper can be easily and safely connected to the hook and feed mechanism by 180 degrees. It can be rotated.

[0016] Further, the embroidery sewing machine according to the present invention is provided with a locking pin on one side of the needle bar or the engaging portion, and the other corresponding position of the needle bar or the engaging portion. Notches that can lock the locking pins are provided at two locations that differ by 180 degrees, and a step is provided in the engagement portion, and the flanges are fixed when they are fixed in respective directions different by 180 degrees. The height to fix the needle is different.

[0017] According to the embroidery sewing machine according to the present invention, it is possible to easily and safely set the direction of the heel needle to be different by 180 degrees by the locking pin and the notch provided on the needle bar and the engaging portion. it can. In general, chain stitches have a better finish when the uppermost point of the vertical movement of the heel needle is set higher than the most stitch when sewing. When fixing in 180 degrees different directions, it is possible to set different heights for fixing the needle. According to the characteristics of each of the two types of embroidery methods, moss stitch and chain stitch, a good finish can be obtained.

The invention's effect

[0018] According to the present invention, it is possible to easily and safely switch between two types of chain stitches, moss stitches and chain stitches, and two types of chain stitches, moss stitches and chain stitches, can be used by beginners and at home. It is possible to make embroidery using freely.

Brief Description of Drawings

FIG. 1 is a perspective view in which a part of a handle embroidery sewing machine according to an embodiment of the present invention is broken.

FIG. 2 is a detailed view of a needle part and an engaging part according to an embodiment of the present invention.

FIG. 3 is a detailed view of a needle bar according to an embodiment of the present invention.

FIG. 4 is a detailed view of the engaging portion of the embodiment of the present invention.

FIG. 5 is a cross-sectional view of the needle part and the engaging part according to the embodiment of the present invention assembled.

FIG. 6 is a cross-sectional view of the needle part and the engaging part according to the embodiment of the present invention assembled.

FIG. 7 is a bottom view in which a part of the lower part of the table according to the embodiment of the present invention is cut away.

FIG. 8 is a side view in which a part of the lower part of the table according to the embodiment of the present invention is cut away.

[Fig. 9] Fig. 9 is a perspective view of a downward force obtained by partially breaking a part of the lower portion of the table according to the embodiment of the present invention.

FIG. 10 is a detailed view of the looper according to the embodiment of the present invention.

[Fig. 11] Fig. 11 is an explanatory view showing the relationship between the needle and the looper according to the embodiment of the present invention.

[Fig. 12] Fig. 12 is an explanatory view showing the relationship between the needle and the looper according to the embodiment of the present invention.

FIG. 13 is an explanatory view showing the relationship between the needle and the looper according to the embodiment of the present invention.

FIG. 14 is an explanatory view showing the relationship between the needle and the looper according to the embodiment of the present invention.

FIG. 15 is an explanatory diagram of moss stitches.

FIG. 16 is an explanatory diagram of chain stitches. Explanation of symbols

[0020] 1 Handle embroidery machine (embroidery machine), 2 鉤 needle, 2a heel part, 4 looper, 5 feed mechanism, 6 direction adjustment mechanism, 7 looper direction switching part, 8 drive part, 15 lower spindle, 16 needle bar, 1 8, 19 Notch, 21 Engagement part, 23 Locking pin, 32 First cylindrical shaft, 32a Base end, 32b Bevel gear, 33 Second cylindrical shaft, 33a Base end, 33b Tip, 33c Umbrella Gear, 33d Umbrella Gear, 35 Handle Shaft, 36 Handle, 37 Oblong Hole, 38 Restriction Member, 41 Arm, 41a One End, 41b Other End, 41d Bevel Gear, 41f Gear, 42 Lever Shaft, 43 Lever, A Sewing Object, B thread, P feed direction, Q reciprocating motion, R rotating motion

BEST MODE FOR CARRYING OUT THE INVENTION

1 to 16 show an embodiment according to the present invention. Fig. 1 shows a perspective view of a part of the handle embroidery sewing machine. Fig. 2 is a detailed view of the needle and engaging portion, Fig. 3 is a detailed view of the needle bar, and Fig. 4 is a detailed view of the engaging portion. Figures 5 and 6 show cross-sectional views of the assembled needle and engaging part. Fig. 7 shows a bottom view of the lower part of the table, Fig. 8 shows a side view of a part of it, and Fig. 9 shows a perspective view of a part of the downward force. Figure 10 shows a detailed view of the looper. Further, FIGS. 11 to 14 are explanatory diagrams showing the relationship between the hook and the looper, FIG. 15 is an explanatory diagram of the moss stitch, and FIG. 16 is an explanatory diagram of the chain stitch.

As shown in FIG. 1, a handle embroidery sewing machine (embroidery sewing machine) 1 according to this embodiment includes a needle part 3 provided with a heel needle 2 for sewing a sewing product A, and a thread guided to the heel needle 2 for engagement. Looper 4 to be joined, feed mechanism 5 for moving the workpiece A in a predetermined feed direction P, a direction adjustment mechanism 6 that can adjust and set the feed direction P in an arbitrary direction, and a direction adjustment mechanism 6 and a looper direction switching unit 7 that can adjust the direction of the Luno 4 independently. In addition, the handle embroidery machine 1 includes a drive unit 8 that can reciprocate the needle 2, the looper 4, and the feed mechanism 5 in synchronism, a table 9 that performs a sewing operation, and a leg 10 that supports the table 9. And a cover 11 for protecting each mechanism at the upper part of the table 9.

As shown in FIGS. 1 and 2, the drive unit 8 includes a motor 12 that is a power source, a head 13 that holds and operates the needle unit 3 and the feed mechanism 5, and the power of the motor 12 is supplied to the head 13. An upper main shaft 14 that transmits power to the looper 4 and a lower main shaft 15 that transmits the power of the motor 12 to the looper 4 are provided. Although not shown, the head 13 includes a mechanism for moving the needle unit 3 up and down, a mechanism for vibrating the feed mechanism 5, a needle And a mechanism for rotating the part 3 and the feeding mechanism 5. In addition, a needle portion 3 is inserted, and in the lower portion through which the needle portion 3 is inserted, a substantially cylindrical shape with a reduced diameter at the lower end side is provided so that a pull 13a is coaxial with the needle portion 3. It is possible to move up and down in synchronization with. The upper main shaft 14 transmits the reciprocating motion Q to the needle portion 3 and the feed mechanism 5, and the lower main shaft 15 transmits the reciprocating motion Q to the looper 4, thereby causing the vertical motion of the needle portion 3 M3 and the reciprocating rotation of the looper 4 to each other. The motion M4, the vertical motion of the feed mechanism 5 and the vibration motion V5 before and after the feed direction are performed in synchronism with each other, so that a constant pitch stitch can be applied to the workpiece A. Further, the rotational motion R is transmitted by the direction adjustment by the direction adjustment mechanism 6, and the rotational motion R3 of the needle unit 3, the rotational motion R4 of the Luno 4 and the rotational motion R5 of the feed mechanism 5 are performed in synchronization.

[0024] As shown in FIG. 2, the feed mechanism 5 is connected to the head 13, and when the needle 3 is attached to the head 13 and the support rod 5a for transmitting the vibration motion V5, the needle of the needle 3 2 and a ring-shaped feed frame 5b surrounding the periphery of 2. The position of the feed frame 5b in the height direction is slightly higher than the table 9, and when the vibrational motion V5 is applied and the lowest point is reached, the workpiece A laid on the table 9 is pressed moderately. The sewing material A should be in a position where it can be moved in the feed direction P by vibration in the feed direction P due to the vibration motion V5.

[0025] As shown in Figs. 2 and 3, the needle portion 3 is provided with a hook portion 2a in which a thread insertion opening portion having one end opened in a hook shape is formed, and the upper end portion 2b is provided with a hook portion 2a. The needle needle 2 is provided with a male thread and a needle bar 16 having a substantially rod-like shape and provided with a screw hole 16b into which the upper end portion 2b of the needle needle 2 can be screwed into the lower end portion 16a. An engagement plate 17 on a substantially circular plate having a through hole 17f into which the needle bar 16 can be inserted is externally fitted and fixed to the upper end portion 16c of the needle bar 16. The side surface 17e of the engagement plate 17 is formed with a screw hole 17g penetrating from the side surface 17e to the through hole 17f, and the fixing screw 17h is screwed to adjust the direction of the needle bar 16 and the engagement plate 17 around the axis. And can be fixed. Further, the engaging plate 17 has a half formed in the thick plate portion 17c and a half formed in the thin plate portion 17d by the step 17b provided on the lower surface 17a side. Further, notches 18 and 19 penetrating from the upper surface 17i to the lower surface 17a are formed on the side surfaces 17e of the thick plate portion 17c and the thin plate portion 17d of the engagement plate 17, respectively. These notches 18 and 19 are arranged at positions different by 180 degrees with respect to the center of the engagement plate 17. Further, an M mark 18a representing a moss stitch is engraved on the side of the notch 18 of the thick plate portion 17c. In addition, there is a chain strap on the side of the notch 19 in the thin plate portion 17d. A C mark 19a is stamped. Further, above the engagement plate 17, a handle 20 is joined to the needle bar 16. The relative positional relationship between the needle bar 16 and the engagement plate 17 about the axis is such that when the locking pin 23 is inserted into the notch 19 of the engagement plate 17 as shown in FIG. The direction of 2a is set so as to be the optimum direction for performing the chain stitch, which will be described later, and is fixed with a fixing screw 17h.

As shown in FIG. 2, the needle portion 3 is engaged with the head 13 by the engaging portion 21. As shown in FIG. 4, the engaging portion 21 is substantially cylindrical and has a through hole 22 at the center. The diameter of the through hole 22 is substantially equal to the diameter of the needle bar 16 and the needle bar 16 is inserted. Is set to possible. The lower end 21a has a substantially D-shaped cross section due to the recess 21b, and annular projections 21d and 21e projecting from the outer peripheral end 21c are provided above the lower end 21a, thereby forming the annular recess 21f. Is formed. Further, a step 21h is formed at the upper end 21g, and a locking pin 23 projects upward. As shown in FIG. 2, the cross-sectional shape and position of the locking pin 23 can be inserted into the notches 18 and 19 of the engaging plate 17 when the needle bar 16 is inserted into the through hole 22 of the engaging portion 21. The cross-sectional shape and position are set. In addition, as shown in FIG. 5, the height of the step 21h is set slightly higher than the step 17b of the engagement plate 17 of the needle part 3, and the position of the step 21h is inserted into the notch 18 with the locking pin 23. In this case, the step 2 lh and the step 17b are set to engage with each other. As shown in FIGS. 4 and 5, a C-ring 24 is provided on the inner peripheral surface 22a of the through hole 22 and screwed into a screw hole 2lj that penetrates the through hole 22 from the side surface 21i. The ring 24 can be pressed into the through hole 22 by the fixing screw 25 inserted.

As shown in FIG. 2, the engaging portion 21 is capable of transmitting the rotational movement transmitted to the head 13 by the concave portion 21b, and is transmitted to the head 13 by the convex portions 21d, 21e and the concave portion 21f. Engaged to transmit vertical motion. The engaging portion 21 can be moved vertically and rotationally by the head 13 by the input of the reciprocating motion Q transmitted from the motor 12 and the rotational motion R transmitted from the direction adjusting mechanism 6. Further, as shown in FIG. 5, the needle bar 16 to which the needle 2 is fixed is inserted into the through hole 22 of the engaging portion 21 fixed to the head 13, and the locking pin 23 is inserted into the notch 18 or 19. By inserting, tightening the fixing screw 25 and pressing the inserted needle bar 16 by the ring 24, the needle part 3 is engaged with the engaging part 21. As a result, the vertical motion M3 and the rotational motion R3 transmitted from the head 13 can be performed. Here, as shown in FIG. 5, the direction of the flange 2a of the needle 2 is such that the needle 2 is screwed to the proximal end of the screw hole 16b of the needle bar 16, and the engagement portion 17 is inserted into the notch 18 of the engagement plate 17. When 21 locking pins 23 are inserted, they are set to be in a direction substantially equal to the feeding direction P of the feeding mechanism 5, and are fixed by fixing screws 17 h of the engaging plate 17. Further, as shown in FIG. 6, when the locking pin 23 of the engaging portion 21 is inserted into the notch 19 of the engaging plate 17, the direction of the hook portion 2a of the hook 2 rotates 180 degrees around the axis. However, the direction is opposite to the feed direction P. Further, as shown in FIGS. 5 and 6, when the locking pin 23 is inserted into the notch 18 of the engagement plate 17 and when the notch 19 is inserted into the locking pin 23, the engagement portion 21 The height at which the needle 2 is fixed differs by the height of the step 21h.

Further, as shown in FIG. 10, the looper 4 is a substantially cylindrical member, and the outer diameter of the through hole 4a is such that the gap 4b is used when the needle 2 is inserted so as to be coaxial. Is set to be larger than the thread thickness. In addition, a gear portion 26 in which helical teeth are formed is provided on the outer peripheral surface 4c. Further, the tip end surface 4d is formed to be inclined in a spiral shape, and the upper end 4e protrudes to form a bowl-shaped recess 27, and the outer peripheral side 4f of the upper end 4e is associated with a thread. A mating engagement groove 28 is provided. As shown in FIG. 8, the looper 4 is provided so as to be coaxial with the needle 2 located above. In addition, the table 9 is formed with a through hole 9a that is set slightly larger than the outer diameter of the Luno 4, and a concave portion 9c is formed in the upper surface portion 9b. A needle plate 29 in which a needle hole 29a that can be inserted is formed is fitted. The looper 4 is rotatably supported by a bearing (not shown) so that the upper end 4e is positioned slightly below the needle plate 29.

Next, as shown in FIG. 7 and FIG. 8, the lower main shaft 15 of the drive unit 8 has a helical tooth set at a tip gear 15 and a gear ratio of 1: 1 with the gear unit 26 of the looper 4. An operating gear 30 having a fixed position is fixed and meshes with the gear 26 of Luno 4. In addition, a transmission member 31 is provided at the base end portion 15b, and the transmission member 31 can transmit the reciprocating motion Q of the motor 12 to the lower main shaft 15 as the reciprocating motion Q15 in the axial direction. Makes it possible to rotate around the axis. As shown in FIGS. 7 and 8, the direction adjusting mechanism 6 has a substantially cylindrical shape and is externally fitted to the lower main shaft 15 of the drive unit 8 so as to be rotatable and movable in the axial direction. The first cylindrical shaft 32, the second cylindrical shaft 33, and the third cylindrical shaft 34, the handle shaft 35 that is rotatably mounted on the table 9, and the blade that is joined to the tip 35a of the handle shaft 35. And $ 36. The first cylindrical shaft 32, the second cylindrical shaft 33, and the third cylindrical shaft 34 are rotatably supported on the table 9 by bearings (not shown) while being restricted in axial movement. Yes. For this reason, the lower main shaft 15 and the first cylindrical shaft 32, the second cylindrical shaft 33, and the third cylindrical shaft 34 are rotatable independently of each other, and the lower main shaft 15 is rotated by the first cylinder. The shaft 32, the second cylindrical shaft 33, and the third cylindrical shaft 34 are movable. The first cylindrical shaft 32 is formed with a long hole 37 penetrating to the outer peripheral surface 15c of the lower main shaft 15. The lower main shaft 15 is fitted with a regulating member 38 at a position corresponding to the long hole 37. It is fixed. The short width of the long hole 37 has substantially the same width as that of the regulating member 38, and the inner diameter of the first cylindrical shaft 32 is substantially the same as the short width of the long hole 37 in the range where the long hole 37 is formed. The diameter is expanded to the same diameter. For this reason, the lower main shaft 15 can move in the axial direction with respect to the first cylindrical shaft 32 within the range in which the restricting member 38 can move inside the elongated hole 37 by the restricting member 38 and the elongated hole 37. Yes, and relatively restricted in rotation. Further, a bevel gear 32 b is provided at the base end portion 32 a of the first cylindrical shaft 32.

[0031] The second cylindrical shaft 33 is provided with bevel gears 33c and 33d at the proximal end portion 33a and the distal end portion 33b, respectively. Similarly, the third cylindrical shaft 34 is also provided with bevel gears 34c and 34d at the proximal end portion 34a and the distal end portion 34b, respectively. A bevel gear 35 c is provided at the base end portion 35 b of the handle shaft 35. Further, an intermediate shaft 39 is rotatably supported on the table 9 between the bevel gear 35c of the handle shaft 35 and the bevel gear 33c of the second cylindrical shaft 33 and the bevel gear 34d of the third cylindrical shaft 34. The bevel gear 39b provided at the distal end portion 39a is connected to the bevel gear 35c of the handle shaft 35 and the bevel gear 39d provided to the base end portion 39c is connected to the bevel gear 33c of the second cylindrical shaft 33 and The third cylindrical shaft 34 is engaged with the bevel gear 34d. Further, the bevel gear 34 c of the base end portion 34 a of the third cylindrical shaft 34 meshes with the bevel gear 40 that transmits the rotational motion R to the head 13 of the drive unit 8. The handle 36 includes a handle 36a joined to the handle shaft 35, and a gripping portion 36d rotatably attached to the tip 36b of the handle 36a by the shaft 36c. Next, the looper direction switching portion 7 is substantially U-shaped, one end portion 41 a is pivotally attached to the first cylindrical shaft 32, and the other end portion 41 b is attached to the second cylindrical shaft 33. The arm 41 is rotatably mounted, the lever shaft 42 is rotatably mounted on the table 9, and the lever 43 is joined to the tip end portion 42 a of the lever shaft 42. A bevel gear 41d is rotatably mounted on the central portion 41c of the arm 41 in the direction of the center of the lower main shaft 15 of the drive unit 8, and the bevel gear 32b of the first cylindrical shaft 32 and the second cylindrical shaft It is engaged with 33 bevel gears 33d. Further, a gear 41 f is joined to the side surface 41 e of the other end 41 b of the arm 41 so as to be coaxial with the second cylindrical shaft 33. A bevel gear 42c is provided at the base end portion 42b of the lever shaft 42. Further, an intermediate shaft 44 is rotatably supported on the table 9 between the bevel gear 42c of the lever shaft 42 and the gear 41f of the arm 41, and is provided at the tip 44a of the intermediate shaft 44. The bevel gear 44b is meshed with the bevel gear 42c of the lever shaft 42, and the gear 44d provided at the base end 44c is meshed with the gear 4 If of the arm 41.

The lever 43 includes a fan-like plate member 45 joined so as to be concentric with the lever shaft 42, a handle 43a joined in the radial direction of the peripheral surface 45a of the plate member 45, and a tip of the handle 43a. A gripping portion 43c provided on the portion 43b. Two restraining pins 46 and 47 project from the upper surface 45b of the plate member 45, and two hemispherical engaging recesses 48 and 49 are formed. The stopping block 50 is fixed to the table 9 by a fixing member (not shown). A hole 50b is formed in the lower surface portion 50a of the restraining block 50, and a spherical body 50d corresponding to the shape of the engagement recesses 48 and 49 is provided so as to be able to appear and retract by a panel 50c accommodated in the hole 50b. As shown in FIG. 7, the lever 43 rotates 90 degrees from the position where the stop pin 46 abuts on one side 50e of the stop block 50 to the position where the stop pin 47 abuts on the other side 50f of the stop block 50. This is set to be possible. Further, when the stop block 50 comes into contact with the stop pin 46 or 47, the spherical body 50d of the stop block 50 is set to fit into the engagement recess 48 or 49 of the plate member 45. The repulsive force of the panel 50c of the stop block 50 is such that the lever 43 does not rotate naturally due to vibration of the main body or the like when the ball 50d of the stop block 50 is fitted in the engagement recess 48 or 49 of the plate member 45. So that it can be easily attached and detached when the lever 43 is manually rotated. Then, as will be described later, the lever 43 is rotated and set to a predetermined position, so that the loop corresponding to the moss stitch and the chain stitch is set. However, the position of the lever 43 locked by the stop block 46 and the stop pin 46 of the plate member 45 and the engagement recess 48 is set so as to correspond to the chain stitch. A C mark 43d indicating a chain stitch is engraved on the side surface 9d of the table 9 corresponding to the position of the grip 43c of the lever 43 at this time. Also, the position of the lever 43 that is locked by the stop block 50 and the stop pin 47 of the plate member 45 and the engagement recess 49 is set so as to correspond to the moss stitch! On the side 9d of the table 9 corresponding to the position of the part 43c,! / Is marked with an M mark 43e indicating a moss stitch.

As described above, the forces described in the configuration of the handle embroidery sewing machine 1 according to the present embodiment are configured so that gears (including bevel gears) that mesh with each other are all in a one-to-one relationship unless otherwise specified in the present embodiment. Ratio. In addition, although not illustrated, each member and mechanism configured at the lower part of the table 9 are held on the table 9 by bearings or the like. Further, in the vicinity of the looper 4 at the bottom of the force table 9 (not shown), there is also provided a supply section for passing the thread B from the lower side of the through hole 4a of the looper 4 to the upper side and supplying it to the heel needle 2 positioned above the looper 4. ing. In addition, although not shown, other members and mechanisms necessary for a normal sewing machine are provided.

Next, the operation of the handle embroidery sewing machine 1 of this embodiment will be described.

In FIG. 1, when the motor 12 of the drive unit 8 is driven as described above, the reciprocating motion Q is transmitted from the upper main shaft 14 to the head 13 and to the lower main shaft 15. As shown in FIG. 2, the reciprocating motion Q transmitted to the head 13 is transmitted as a vertical motion M3 to the engaging portion 21 by the head 13 and is fixed to the engaging portion 21. The needle 2 of moves up and down M3. The reciprocating motion Q is transmitted to the feed mechanism 5 as a vibration motion V5, and the feed frame 5b vibrates up and down while vibrating back and forth in the feed direction. Move by a predetermined pitch. Also, the head 13 moves the pull 13a downward with a slight delay when the heel needle 2 moves downward and makes it abut against the sewing object A. When the heel needle 2 moves upward, In this case, the upper and lower parts 13a are caused to move up and down a little earlier than the upward movement of the needle 2. Further, as shown in FIG. 7, the transmission of the reciprocating motion Q to the lower main shaft 15 is transmitted as the reciprocating motion Q15 in the axial direction via the transmission member 31. At this time, first The cylindrical shaft 32, the second cylindrical shaft 33, and the third cylindrical shaft 34 do not move, and only the lower main shaft 15 moves in the axial direction, and the operating gear 30 of the tip portion 15a moves from the gear portion 26 of Luno 4 The reciprocating motion Q15 is transmitted as the reciprocating rotational motion M4 of the looper 4. Here, the amplitude of the reciprocating motion Q15 of the lower spindle 15 is set so that the amplitude of the reciprocating rotational motion M4 of Luno 4 is 360 degrees.

[0036] The vertical movement M3 of the heel needle 2, the reciprocating rotational movement M4 of the looper 4, and the vibration movement V5 of the feed mechanism 5 are synchronized, and the workpiece A is sewn by interlocking these. The details are shown below. FIGS. 11 to 14 show the relative relationship between the heel needle 2 and Luno 4 when the sewing product A is being sewn. 11 to 14, in order to clarify the relationship between the needle 2 and the Luno 4, only the needle 2, the looper 4, the operating gear 30, the lower spindle 15 of the drive unit 8, the thread B and the sewing product A are used. It is described and other components are omitted. As shown in FIG. 11, the thread B used for sewing is supplied from a supply unit (not shown) and is inserted into the through hole 4a from the lower side of the looper 4 to the upper side, and is a recess located below the upper end 4e of the Luno 4. From 27 to the outside of Luno 4, it is engaged with the engaging groove 28 of Luno 4. First, as shown in FIG. 11, the heel needle 2 moves downward and penetrates the upper force sewing material A of the sewing material A. At this time, the engagement groove 28 of the looper 4 is directed in the direction opposite to the flange 2a of the needle 2, and the operation is performed as the lower main shaft 15 of the drive unit 8 moves in the S direction on the base end side. It rotates clockwise because of the relationship between gear 30 and gear section 26 of Luno 4.

Next, as shown in FIG. 12, the heel needle 2 further moves downward, is inserted into the through hole 4a of the looper 4, reaches the lowest point, and switches to upward movement. At this time, the looper 4 rotates clockwise as the lower main shaft 15 moves in the S direction, and the engaging groove 28 of the looper 4 faces the same direction as the flange 2a of the hook needle 2. As the Luno 4 rotates clockwise, the thread B is guided by the engaging groove 28 of the Luno 4 so as to be wound around the needle 2 inserted into the through hole 4a. Further, when Luno 4 rotates clockwise, the thread B is wound around the needle 2, and the wound thread B is engaged with the hook 2a of the needle 2 as the needle 2 moves upward. .

As shown in FIG. 13, the heel needle 2 further moves upward, and the heel needle 2 pulls up the thread B engaged with the heel portion 2a from the hole 51 penetrating the workpiece A in an annular shape. When the heel part 2a of the heel needle 2 reaches a position approximately equal to the workpiece A, the engagement groove 28 of the looper 4 is again opposite to the heel part 2a of the heel needle 2. Turn to the side. As the moving direction of the lower spindle 15 is reversed from the S direction and switched to the T direction, the looper 4 is also switched to the left rotation.

Next, as shown in FIG. 14, the needle 2 further moves upward, reaches the highest point, and switches to a downward movement. At this time, the thread B is pulled up by the heel needle 2, and a ring 52 is formed above the sewing material A. Then, as the hook needle 2 is switched to the downward movement, the formed ring 52 is left behind from being engaged with the hook portion 2a of the hook needle 2. Here, the same operation is repeated from the step shown in FIG. 11 by feeding the sewing product A by a predetermined pitch by the feed mechanism 5, and the next ring is again moved to a position away from the predetermined pitch as shown in FIG. 52 can be formed. In this case, since the direction of the feed direction P and the heel 2a of the heel needle 2 are substantially equal, when the heel needle 2 that has reached the uppermost point moves downward, the feed of the sewing product A and the heel needle 2 Since the thread B is released from the heel 2a of the heel needle 2 by the downward movement, a moss stitch can be applied.

[0040] FIG. 16 shows a case where the directions of the eyelet 2 and the looper 4 with respect to the feed direction P are reversed by 180 degrees. In this case, even if the heel needle 2 reaches the highest point and switches to the downward movement, the direction of the heel part 2a of the heel needle 2 and the feed direction P of the sewing material A are opposite. The ring 52 moves with the hook 2 while being engaged with the hook 2a of the ring 2, and the ring 52 is pushed down in the direction opposite to the feed direction P. Then, when the heel needle 2 penetrates the workpiece A downward, it is disengaged from the heel portion 2 a of the heel needle 2. At this time, since the heel needle 2 is located in the inside 52a of the ring 52 of the thread B, the ring 52 formed by the next thread B being pulled up in a ring is pulled up from the inside 52a of the previous ring 52. By repeating this, a continuous ring 52 is connected to the upper surface A1 of the sewing object A in a chain shape, and chain stitching can be performed. Here, as shown in FIG. 2, the head 13 causes the pull 13 a to move together with the downward movement of the heel needle 2 and press the workpiece A, so that the heel needle 2 penetrates the workpiece A. At the same time, the ring 52 that has been pushed down and pulled off from the hook 2a of the needle 2 is pressed down by the -pull 13a, so that the next ring 52 is pulled up from the inside 52a of the previous ring 52 with certainty that the thread B will not be displaced. be able to. Also, at this time, the needle 2 moves up and down relatively with respect to the -pull 13a, and -the force protruding and retracting from the pull 13a -the lower end side of the pull 13a is reduced in diameter, so that the operator visually observes the needle 2 The workability can be ensured without any hindrance. [0041] Next, adjustment of the feed direction P of the sewing product A will be described. As described above, it is necessary to maintain a certain relationship between the feed direction P and the direction of the heel 2a of the heel needle 2 in both the moss stitch and the chain stitch. In order to engage thread B, it is necessary to maintain a certain relationship with needle 2 and Luno 4. For this reason, when adjusting the feed direction P, it is necessary to synchronize and rotate all of the feed mechanism 5, the needle 2 and the looper 4. As shown in FIG. 7, the handle 36 of the direction adjusting mechanism 6 is rotated around the axis of the needle shaft 35 by a predetermined angle. The rotation is transmitted from the handle shaft 35 to the intermediate shaft 39 via the bevel gears 35 c and 39 b. The rotation of the intermediate shaft 39 is transmitted to the second cylindrical shaft 33 and the third cylindrical shaft 34 via the bevel gear 39d and the bevel gears 33c and 34d. Further, the rotation of the second cylindrical shaft 33 is transmitted from the bevel gear 33 d of the second cylindrical shaft 33 to the bevel gear 32 b of the first cylindrical shaft 32 via the bevel gear 41 d of the arm 41. At this time, the arm 41 and the first cylindrical shaft 32 and the second cylindrical shaft 33 can rotate independently of each other, and the bevel gear 41d is rotatably mounted on the arm 41. Does not rotate. Since the first cylindrical shaft 32 and the lower main shaft 15 are relatively restricted by the elongated hole 37 and the regulating member 38, the lower main shaft 15 rotates in conjunction with the first cylindrical shaft 32. To do. As the lower main shaft 15 rotates, the operating gear 30 rotates and is transmitted to the looper 4 by the gear portion 26 of the Luno 4 so that the looper 4 rotates.

In addition, the rotation transmitted from the handle shaft 35 to the third cylindrical shaft 34 is transmitted from the bevel gear 34 c of the third cylindrical shaft 34 to the bevel gear 40. As shown in FIG. 1, the rotational motion R transmitted to the bevel gear 40 is transmitted to the head 13 and is transmitted as the rotational motion R3 of the eyelid 2 of the needle portion 3 and the rotational motion R5 of the feed mechanism 5. In this way, the feed direction P can be adjusted by the direction adjusting mechanism 6 independently of the reciprocating motion Q transmitted from the motor 12 of the drive unit 8 along with the sewing work. Further, since all the corresponding gears have a one-to-one gear ratio, the angle at which the handle 36 is rotated is equal to all the rotation angles of the needle 2, the looper 4, and the feed mechanism 5. Therefore, the operator can easily determine the feed direction P based on the sense of operation of the handle 36.

[0043] Next, a method of switching between moss stitches and chain stitches will be described. As described above, the moth stitch and chain stitch can be switched by fixing the feed direction P and It is necessary to reverse the direction of Looper 4 180 degrees. First, reverse the direction of the needle 2. As shown in FIGS. 2 and 6, the scissors needle 2 is held by the needle bar 16, and the needle bar 16 has the locking pin 23 of the engaging portion 21 inserted into the notch 19 and the fixing screw 25 and the ring 24. It is fixed by tightening with. As described above, in the state where the locking pin 23 is inserted into the notch 19, the chain stitch, that is, the needle 2a of the needle 2 with respect to the feed direction P is reversed. The rod 16 and the engagement plate 17 are fixed. Here, the fixing screw 25 is loosened, the needle bar 16 is pulled up, and the locking pin 23 is pulled out from the notch 19. Then, after rotating 180 degrees, the locking pin 23 is inserted into the notch 18 and the fixing screw 25 is tightened again, thereby reversing the direction of the needle 2. Thus, the direction of the needle 2 can be accurately and easily reversed simply by loosening the fixing screw 25 and selecting a force for inserting the locking pin 23 into either the notch 18 or the notch 19. In addition, each notch 18, 19 is marked with a corresponding moth stitch or chain stitch initial mark 18 a and 19 a so that it can be easily identified and selected.

Here, as shown in FIG. 15 and FIG. 16, the chain stitch is connected to the next ring in a chain form as compared to the moss stitch, thereby forming a ring 52 larger than the feed pitch. It is necessary to form a large ring 52 as compared to the ring 52 formed by moss stitches. For this reason, it is necessary to increase the height of the thread B by raising the uppermost point of the vertical movement of the needle 2 when chain stitching is higher than when moss stitching. As shown in FIGS. 5 and 6, steps 21h and 17b are provided on the upper end portion 21g of the engaging portion 21 and the lower surface 17a of the engaging plate 17 of the needle portion 3, respectively. Therefore, when the locking pin 23 is inserted into the notch 18 and when the locking pin 23 is inserted into the notch 19, the height at which the needle 2 is fixed can be changed by the height of the step 21h. Yes, the chain can be raised higher than the moss stitch during chain stitching.

[0045] Next, the direction of the looper 4 is reversed. First, as shown in FIG. 7, the grip 43 43c of the lever 43 is gripped, and the lever 43 is rotated until the stop pin 47 comes into contact with the stop block 50 until the stop pin 47 comes into contact with the stop block 50. Move. By applying a certain amount of rotational force, the spherical body 50d of the stop block 50 fitted in the engagement recess 48 of the plate member 45 is displaced, released, and becomes rotatable. Then rotate lever 43 by 90 degrees to When the stop pin 47 is brought into contact with the other side surface 50f of the hook 50, the spherical body 50d of the stop block 50 is fitted into the engagement recess 49 of the plate member 45, and the plate member 45 must be given a certain amount of rotational force in the opposite direction. Thus, the engagement between the engagement recess 49 and the spherical body 50d of the stop block 50 is not released, and the lever 43 is fixed at a position rotated 90 degrees. The rotation of the lever 43 is transmitted to the lever shaft 42, and is transmitted to the intermediate shaft 44 through the bevel gear 42c and the bevel gear 44b. Further, the rotation of the intermediate shaft 44 is transmitted from the gear 44d to the gear 4 If of the arm 41. Here, since the arm 41 is pivotally attached to the first cylindrical shaft 32 and the second cylindrical shaft 33, the arm 41 is independent of the first cylindrical shaft 32 and the second cylindrical shaft 33. It rotates by the rotation of the gear 41f. The bevel gear 42c of the lever shaft 42 and the bevel gear 44b of the intermediate shaft 44, and the gear 44d of the intermediate shaft 44 and the gear 41f of the arm 41 have a gear ratio of 1: 1. For this reason, as shown in FIG. 9, by rotating the lever 43 by 90 degrees, the arm 41 is rotated by 90 degrees.

As shown in FIG. 7, the bevel gear 41 d of the arm 41 is engaged with the bevel gear 32 b of the first cylindrical shaft 32 and the bevel gear 33 d of the second cylindrical shaft 33. Therefore, as the arm 41 rotates, the bevel gear 41d of the arm 41 is a planetary gear, and the bevel gear 32b of the first cylindrical shaft 32 and the bevel gear 33d of the second cylindrical shaft 33 are sun gears. Acts as a gear device. The second cylindrical shaft 33 is also connected to a mechanism related to the rotational movement of the eyelid needle 2 and the feed mechanism 5 via the handle shaft 35 and the third cylindrical shaft 34. On the other hand, the first cylindrical shaft 32 is connected to the Luno 4 via the lower main shaft 15 and the force of the regulating member 38. In this way, the mechanism connected to the first cylindrical shaft 32 and connected to the second cylindrical shaft 33 is more complicated than the mechanism that has a relatively complicated mechanism. Is big. For this reason, when the arm 41 rotates 90 degrees, the bevel gear 33d of the second cylindrical shaft 33 does not rotate, and only the bevel gear 32b of the first cylindrical shaft 32 determines the rotation speed of the arm 41 and the bevel gear. Rotates according to the total number of rotations of 41d. Since the bevel gear 41d of the arm 41, the bevel gear 32b of the first cylindrical shaft 32, and the bevel gear 33d of the second cylindrical shaft 33 have a one-to-one gear ratio, the arm is 90 degrees apart. By rotating, the first cylindrical shaft 32 rotates 180 degrees. Since the first cylindrical shaft 32 and the lower main shaft 15 are relatively rotationally restricted by the elongated hole 37 and the restricting member 38, the lower main shaft 15 is interlocked with the first cylindrical shaft 32. Rotate 180 degrees. As the lower main spindle 15 rotates, the rotation is transmitted from the operating gear 30 to the gear portion 26 of the looper 4 to rotate the looper 4. Togashi.

Since the gear ratio between the operating gear 30 and the gear section 26 of Luno 4 is also set to 1: 1, it is possible to rotate Luno 4 180 degrees by rotating lever 43 by 90 degrees. . Thus, the looper direction switching unit 7 can rotate only the luno 4 180 degrees independently of the direction adjusting mechanism 6. In addition, with the mechanism provided with the arm 41, the Luno 4 can be rotated 180 degrees simply by rotating the lever 43 by 90 degrees, which further facilitates the operation.

[0047] As described above, the handle embroidery sewing machine 1 of this embodiment performs sewing by synchronizing the vertical movement M3 of the heel needle 2, the reciprocating rotational movement M4 of the looper 4, and the vibration movement V5 of the feed mechanism 5. At the same time, the feed direction P can be adjusted and set by synchronizing the rotary motion R3 of the needle 2 R3, the rotary motion R4 of Luno 4 and the rotary motion R5 of the feed mechanism 5 independently by the direction adjustment mechanism 6. Is possible. For this reason, the direction of chain stitching can be selected freely. In addition to these mechanisms, without changing the feed direction P of the feed mechanism 5, the direction of the heel needle 2 is changed so that the locking pin 23 of the engagement portion 21 and the notches 18, 19 of the engagement plate 17 of the needle portion 3 Thus, the direction of Luno 4 can be set to the direction different by 180 degrees easily and accurately by the looper direction switching unit 7. Marks 18a and 19a are provided on the notches 18 and 19 for changing the direction of the heel needle 2, and marks 43d and 43e are provided on the looper direction switching portion 7 so as to correspond to the displacement of the moth stitch or chain stitch. ! /, It is easy to identify the power. For this reason, switching between moss stitches and chain stitches, which was limited to skilled workers and was complicated and time-consuming, can be easily and safely used by beginners and homes. In addition, since all the components are mechanical and simple and do not require electrical control, the apparatus can be minimized and can be provided at low cost. Furthermore, the size of the ring 52 can be changed between the moss stitch and the chain stitch by the step 17b of the engagement plate 17 of the needle part 3 and the step 21h of the engagement part 21, and the finish is better than before. Can be.

[0048] It should be noted that the upper end portion 2b of the heel needle 2 is formed with a male screw, and is not limited to the force that is inserted into the needle bar 16. At least the needle bar 2 can be held by the needle bar 1 6 without being loosened or falling off during sewing, and the direction of the needle needle 2 should be determined in a predetermined direction. As long as it is possible, for example, a pin, a groove, or the like that locks each other with unevenness may be used. Also, in order to fix the needle bar 16 to the engagement portion 21, two notches 18 and 19 are provided in the engagement plate 17 of the needle portion 3, and the engagement pin 21 is provided with the locking pin 23. It is not limited. For example, the engagement plate 17 may be provided with a locking pin, and the engagement portion 21 may be provided with two corresponding notches. In addition, the gear ratios of all the corresponding gears have a one-to-one relationship. However, the present invention is not limited to this, and the gear ratios may be different according to the design conditions.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like that do not depart from the gist of the present invention. It is.

Industrial applicability

[0050] As an application example of the present invention, application to an embroidery sewing machine capable of performing chain stitching is preferable.

Claims

The scope of the claims

[1] A needle portion having a heel needle, a looper that guides a thread to the heel portion of the heel needle, a feed mechanism that moves a sewing product in a predetermined feed direction, and a reciprocating operation of the heel needle in the axial direction of the needle portion. The drive unit that synchronizes the movement, the reciprocating rotation of the looper and the vibration of the feed mechanism, and the needle unit can be fixed to the drive unit in two different directions around the axis of the needle unit. An engaging portion and a looper direction switching portion capable of rotating the direction of the looper by 180 degrees,

Two different types of chain stitches, chain stitch and moss stitch, are possible by rotating the direction of the needle part and the direction of the looper by 180 degrees with respect to the feed direction of the feed mechanism. sewing machine.

[2] In the embroidery sewing machine according to claim 1,

The main shaft of the drive unit that reciprocates in the axial direction and transmits the reciprocating motion to the looper is rotated without being interlocked with the reciprocating motion, so that the feed direction of the feed mechanism, the direction of the hook needle, and the looper An embroidery sewing machine that has a direction adjustment mechanism that can be set in synchronization with the direction of the sewing machine, and can perform chain stitches by freely changing the sewing direction.

[3] In the embroidery sewing machine according to claim 1,

The heel needle is formed with a thread insertion opening portion, and the needle section is located at a position where the thread insertion opening portion is directed in the feeding direction of the feeding mechanism with respect to the engaging portion, and the thread insertion opening. Is fixed at a position that is directed in the direction opposite to the feed direction of the feed mechanism,

The looper has a cylindrical shape having a through-hole into which a thread is inserted. An engagement groove is formed at one end of the looper through a looper recess, and the thread is inserted into the through-hole and is inserted into the through-hole from the recess. The looper comes out of the looper and is engaged with the engagement groove. The looper direction switching portion rotates the direction of the looper by 180 degrees, so that the engagement groove becomes the feed mechanism. The embroidery sewing machine is oriented in the direction opposite to the feed direction of the feed mechanism and the feed direction of the feed mechanism.

[4] In the embroidery sewing machine according to claim 2,

The direction adjusting mechanism includes a rotatable handle and a hand that transmits the rotation of the handle. And a restriction member that is externally fitted and fixed to the main shaft of the drive unit and has a long hole that is movable in the axial direction and is rotationally restricted, is fitted on the main shaft, and is provided with a bevel gear at one end. One cylindrical shaft is rotatably fitted to the main shaft, and a bevel gear is provided at one end facing the first cylindrical shaft, and a gear for transmitting the rotation of the handle shaft is provided at the other end. Two cylindrical shafts,

The looper direction switching unit includes a lever that can be rotated between a locking position corresponding to each of the chain stitch and the moss stitch, a lever shaft that transmits the rotation of the lever, and one end portion of the loop stitching direction switching unit. The other end is pivotally attached to the second cylindrical shaft and the rotation of the lever shaft is transmitted to one of the ends. A substantially u-shaped arm provided with

The bevel gear of the first cylindrical shaft and the bevel gear of the second cylindrical shaft of the direction adjusting mechanism are arranged on a bevel gear rotatably mounted on the arm of the looper direction switching unit. An embroidery sewing machine that can be interlocked and interlocked.

The embroidery sewing machine according to claim 1,

The needle part has a needle bar for holding the needle.

A locking pin is provided on either one of the needle bar or the engaging portion, and the locking pin is provided at two positions that are 180 degrees different from the corresponding positions on the other side of the needle bar or the engaging portion. A notch that can be locked is provided,

The engagement portion is provided with a step, and the embroidery sewing machine has different heights for fixing the heel needle when the needle portion is fixed in different directions by 180 degrees.