JP2012228030A - Cable peeling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable peeling device which prevents a cutting blade from slipping from a cable member that is cut and easily cuts a cable.SOLUTION: A cable peeling device 1 includes: a cylindrical housing 3 fixing a cable 9; and a holder 7 holding a cutting blade 5 and spirally moving relative to the housing 3. The housing 3 includes: a cable clamp 11 fixing the inserted cable 9; and a nut 15 having a female screw part 13 formed on an inner surface. The holder 7 includes: a male screw part 21 threadedly engaging with the female screw part 13 of the housing 3; a small diameter part 23 connecting with the male screw part 21 and having a diameter smaller than an inner diameter of the female screw part 13; a cutting part 25 connecting with the small diameter part 23 and protruding from the inner diameter of the female screw part 13 in the radial direction; a cutting blade 5 having an angle relative to the axial core of the cable 9; an eject window 27 ejecting cutting dust; and an attachment 29 connecting with the cutting part 25 and held by a chuck of a rotary tool.

Description

  The present invention relates to a cable peeling machine that peels an insulator, a sheath, a slot, and the like from a conductor or a tension member at an end of a covered electric wire, a cable, an optical fiber cable or the like.

  As a cable peeling machine that removes the coating from the end of the cable and strips the conductor, a rotary type cable coating peeling tool described in Patent Document 1 is known. The stripping tool includes a cylindrical sheath holder that is rotatable with respect to the cable, a cylindrical portion that accommodates the stripped conductor connected to the rear end of the sheath holder, and a spiral on the inner wall of the sheath holder. And a coating peeling cutter provided. A chucking portion is provided at the rear end of the cylindrical portion, and the chucking portion can be rotationally driven by a rotating device such as an electric drill. When the tip of the cable is inserted into the sheath holder and the chucking portion is driven to rotate, the sheath stripping cutter spirally strips the sheath of the cable, and the stripped conductor enters the inside of the cylindrical portion sequentially, When the front end comes into contact with the bottom of the cylindrical portion, the predetermined length of peeling ends.

  As a cable peeling machine that removes a cable sheath at a midpoint of a long cable, an optical fiber cable sheath removing device described in Patent Document 2 is known. The general shape of the apparatus main body is a shape in which a cylindrical shape having a cable through hole in the axial direction is halved and connected to be opened and closed by a hinge. A cutting blade provided obliquely with respect to the shaft center protrudes from the cable through hole. The cable casing is cut in a spiral shape by sandwiching the cable with the apparatus body and fixing the open / close lock and rotating and sliding the apparatus body in the cable axial direction.

  Moreover, the cable peeling apparatus of patent document 3 is known as a cable peeling machine which removes an outer sheath from the edge part of a cable, and peels the content of a cable. This device includes a mechanism for clamping a cable, a blade having a mechanism that can be adjusted with respect to an insulator of the cable, a drive unit that rotates the blade, and an adjustment unit that advances and retracts the blade in the axial direction. It arrange | positions so that a play may be provided in the distance between the blade and clamp part in a cable axial direction.

Japanese Patent Laid-Open No. 8-103013 JP 2004-184749 A Special table 2009-500059 gazette

  However, a coated electric wire in which a stranded wire conductor is covered with an insulator or a slot type optical fiber cable using a stranded wire type tension member has high adhesion between the conductor and the coating resin, and between the tension member and the resin of the slot rod. . For this reason, the conventional cable peeling machine that peels the outer skin from the conductor by spirally cutting the outer skin cannot obtain the required peeling force, and the blade slips and is difficult to peel. It was.

  In order to solve the above-described problems, an object of the present invention is to provide a cable peeling machine that can easily peel an outer sheath or a slot rod from a cable center member such as a stranded wire conductor or a stranded wire type tension member. That is.

  In order to achieve the above object, the present invention is a cable peeling machine comprising a cylindrical housing for fixing a cable, and a holder for holding a cutting blade and spirally moving with respect to the housing. Includes a cable clamp for fixing the inserted cable and a female screw portion formed on the inner surface, and the holder is connected to the female screw portion of the housing and a female screw portion connected to the male screw portion. A small diameter portion having a smaller diameter than the inner diameter of the screw portion, a cutting portion connected to the small diameter portion and projecting radially from the inner diameter of the female screw portion, and a cutting blade fixed to the cutting portion and having an angle with respect to the axis of the cable; The gist is provided with a discharge window for discharging the cable sheath cut by the cutting blade, and an attachment that is connected to the cutting portion and can be gripped by the chuck of the rotary tool.

  Moreover, in the cable peeling machine of this invention, the handle attached to the said housing and extended in the direction which cross | intersects the axial direction of this housing can be further provided.

  Moreover, in the cable peeling machine of this invention, the pitch of the said external thread part and an internal thread part, ie, the pitch of the said spiral motion, has the preferable range of 3 [mm] or more and 5 [mm] or less.

  According to the present invention, the relationship between the rotational motion and the translational motion of the holder with respect to the housing is a constant pitch defined by the pitch of the threaded portion, so that the stranded wire conductor or the stranded wire type tension member does not slip. Thus, there is an effect that it is possible to provide a cable peeling machine that can easily peel the outer skin and the slot rod from the cable center member.

  In addition, the cutting scrap has a thickness of the pitch of the screw, and the cutting scrap can be easily peeled from the central member of the cable that is not cut by the reaction force of elastic deformation when the cutting scrap is discharged from the discharge window. effective.

It is a perspective view explaining embodiment of the cable peeling machine which concerns on this invention. It is a partial section perspective view explaining an embodiment of a cable peeling machine concerning the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view for explaining the external appearance of an embodiment of a cable peeling machine according to the present invention. FIG. 2 is a partial cross-sectional perspective view for explaining the internal structure of the embodiment of the cable peeling machine according to the present invention, and shows a finished state of cable peeling.

  As shown in FIG. 1, the cable peeling machine 1 includes a cylindrical housing 3 and a cutting blade 5 and a holder 7 that spirally moves with respect to the housing 3.

  In this embodiment, as shown in FIG. 2, the cable for cutting the outer sheath (sheath) 9b of the optical fiber cable 9, the tape fiber (not shown), and the slot rod 9c, leaving the tension member 9a of the optical fiber cable 9. The peeling machine 1 is shown.

  The tension member 9a is, for example, a steel stranded wire using seven strands, and a slot rod 9c having a plurality of grooves 9d on the outer periphery is welded around the tension member 9a using, for example, polyethylene resin. Has been. A plurality of tape fibers (not shown) are accommodated in each groove 9d, a pressing tape using a non-illustrated nonwoven fabric or the like is wound around the outer periphery thereof, and an outer skin 9b using weather resistant polyethylene is provided on the outer periphery thereof. .

  A cable clamp 11 for fixing the inserted cable 9, a nut 15 for providing a female screw portion 13 inside the housing 3, and a handle 17 are fixed to the housing 3. The cable clamp 11 includes a clamp body 11a that is screwed and fixed to a nut-shaped portion 3a formed at the rear end of the housing 3, a tightening cap 11b, a plurality of movable fins and an annular rubber bush (not shown). ing.

  For example, a plurality of trapezoidal movable fins whose bottoms are connected to the clamp body 11a are provided inside the tightening cap 11b. When the tightening cap 11b is tightened, the angle at which each movable fin falls to the inside increases, and the cable 9 is tightened and fixed via the rubber bush. When the tightening cap 11b is loosened, each movable fin opens outward, the tightening of the rubber bush is relaxed, and the cable 9 can be inserted into and removed from the cable clamp 11. Note that a plurality of types of cable clamps 11 may be prepared and exchanged according to the outer diameter of the cable 9.

  The nut 15 includes a circular flange 15a for fixing to the housing 3 with four screws 19, and a cylindrical female screw portion 13 connected to the flange 15a. The housing 3 is preferably made of an aluminum alloy or the like in order to reduce the weight of the entire cable peeling machine 1, but the nut 15 is made of corrosion resistant stainless steel or the like in order to make the female screw portion 13 durable. It is preferable to manufacture the material with the property, hardness and toughness.

  As shown in FIG. 1, the housing 3 is provided with a handle 17 in a direction intersecting the axial direction of the housing 3, for example, in a perpendicular direction. At the time of cable peeling, the operator holds the handle 17 with the left hand to fix the housing 3 and rotates the rotary tool such as an electric drill or an electric screwdriver attached to the attachment 29 described later with the right hand. Can do.

  The holder 5 includes a male screw part 21 screwed into the female screw part 13 of the housing 3, a small diameter part 23 connected to the male screw part 21, a cutting part 25 connected to the small diameter part 23, and a cutting part 25. And an attachment 27 which is screwed.

  The male screw portion 21 has a male screw formed on the outer periphery thereof and is screwed into the female screw portion 13 of the housing 3. In the present embodiment, the thread shape of the male screw portion 21 and the female screw portion 13 is a square square screw so that a large force can be transmitted in the axial direction with a relatively small moment. As described above, the screw thread shape is preferably a square screw, but if the cable to be cut is relatively thin and the torque required for cutting is relatively small, a trapezoidal screw or a triangular screw may be used.

  In the case of a cable peeling machine that targets a tape slot type optical fiber cable, the pitch between the male screw portion 21 and the female screw portion 13 is preferably in the range of 3 [mm] or more and 5 [mm] or less. . When the pitch is smaller than this range, the thickness of the cutting piece is thin, so that the cutting piece is broken before the cutting piece is peeled off from the tension member 9a, and the resin of the slot rod 9c tends to remain on the tension member 9a. There is a possibility. On the other hand, when the pitch is larger than this range, the resistance of the cutting blade 5 to cut into the slot rod 9c becomes too large, and cutting may become difficult.

  When the outer diameter of the small diameter portion 23 is smaller than the female screw portion 13 of the housing 3, the holder 5 rotates and enters the inside of the housing 3, and the male screw 21 portion is removed from the female screw portion 13, 5 idles with respect to the housing 3. FIG. 2 shows this state.

  A cutting blade 5 having an angle with respect to the axial direction of the cable 9 is fixed to the cutting portion 25 with screws 5a. The cutting unit 25 is provided with a discharge window 27 for discharging the member of the cable 9 cut by the cutting blade 5.

  The attachment 29 includes a flange 29a for screwing to the cutting portion 25, a tip 29b having a hexagonal column shape, for example, which is connected to the flange 29a and attached to a chuck of a rotary tool such as an electric drill, and a tension that is not cut. And a center hole 29c through which the member 9a is inserted.

  Next, the usage method of the cable peeling machine 1 of this embodiment is demonstrated. In order to use the cable peeling machine 1, first, the female screw portion 13 and the male screw portion 21 are screwed together, the housing 3 is fixed, the holder 7 is rotated counterclockwise, and the length to be peeled off is obtained. Accordingly, the holder 7 protrudes from the housing 3. Next, the cable 9 to be cut is inserted into the cable clamp 11 provided at the rear end of the housing 3, and the tightening cap 11 b of the cable clamp 11 is tightened at a position where the tip of the cable 9 is in contact with the cutting blade 5. Then, the cable 9 is fixed.

  Next, the tip 29a of the attachment 29 is attached to the chuck of the rotary tool. Next, the handle 17 is pressed with the left hand, the trigger of the rotary tool held in the right hand is pulled, and the holder 7 is rotated forward. By this rotation, the holder 7 spirally moves with respect to the housing 3 at a pitch of the female screw portion 13 and the male screw portion 21, and by this helical movement, the cutting blade 5 causes the sheath 9 b of the cable 9, the tape fiber, the slot The rod 9c is cut and the cutting waste is discharged from the discharge window. At this time, the cutting piece of the slot rod has a thickness determined by the pitch of the female screw portion 13 and the male screw portion 21 and is lifted by the cutting edge angle of the cutting blade 5, so that the cutting piece having this constant thickness is It is easily peeled off from the tension member 9a. The tension member 9a from which the sheath 9b, the tape fiber, and the slot rod 9c are peeled from the cable 9 sequentially enters the center hole 29c of the attachment 29.

  When the rotation of the holder 7 with respect to the housing 3 proceeds and the male screw portion 21 is removed from the female screw portion 13, the holder 7 idles and cutting stops. Here, the rotation of the rotary tool is stopped, the chuck of the rotary tool is loosened, and the rotary tool is removed from the attachment 29 of the cable peeling machine 1. Next, the tightening cap 11b of the cable clamp 11 is loosened, the cable 9 is removed from the cable peeling machine 1, and a series of peeling operations is completed.

  According to the embodiment described above, it is possible to provide a cable peeling machine that can easily peel the outer sheath and the slot rod from the cable center member such as a stranded wire conductor or a stranded wire type tension member.

  As mentioned above, although this invention was demonstrated in detail using embodiment, this invention is not limited to embodiment described in this specification. The scope of the present invention is determined by the description of the claims and the scope equivalent to the description of the claims.

DESCRIPTION OF SYMBOLS 1 ... Cable peeling machine, 3 ... Housing, 5 ... Cutting blade, 7 ... Holder, 9 ... Cable, 11 ... Cable clamp, 13 ... Female screw part, 15 ... Nut, 17 ... Handle, 21 ... Male screw part, 23 ... Small diameter part, 25 ... cutting part, 27 ... discharge window, 29 ... attachment

Claims (3)

A cable peeling machine comprising: a cylindrical housing that fixes a cable; and a holder that holds a cutting blade and spirals with respect to the housing,
The housing includes a cable clamp for fixing the inserted cable, and a female screw portion formed on the inner surface,
The holder includes a male screw portion that is screwed into the female screw portion of the housing, a small diameter portion that is connected to the male screw portion and has a smaller diameter than the inner diameter of the female screw portion, and an inner diameter of the female screw portion that is connected to the small diameter portion. A cutting portion projecting in a more radial direction, a cutting blade fixed to the cutting portion and having an angle with respect to the axis of the cable, a discharge window for discharging the cable sheath cut by the cutting blade, and a cutting portion, A cable peeling machine comprising an attachment that can be held by a chuck of a rotary tool.   The cable peeling machine according to claim 1, further comprising a handle attached to the housing and extending in a direction intersecting with an axial direction of the housing.   2. The cable peeling machine according to claim 1, wherein a pitch of the male screw portion and the female screw portion, that is, a pitch of the spiral motion is in a range of 3 mm or more and 5 mm or less.

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