JP2005080459A - Shielded electric wire braid processing device and braid processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielded electric wire braid processing device and a braid processing method that can surely remove cutting wastes after cutting the braid of a shielded electric wire and that can prevent the occurrence of failures including a cutting defect arising from cutting wastes remaining in the braid processing device. <P>SOLUTION: This shielded electric wire braid processing device 1 is provided with a die having a passing hole 2a for passing an end portion where the braid 6 of the shielded electric wire 5 is exposed and a cutting blade 2d provided at the edge of the passing hole 2a; a punch 3 that is driven movably in the direction of being inserted into or removed from the passing holes 2a of the die 2, that enters between the braid 6 and an internal covering 8 of the shielded electric wire 5 passed through the passing hole 2a, and that has another cutting blade 3a that cuts the braid 6 into a circular slice working with the cutting blade 2d of the die 2; and a removing mechanism 4 arranged so as to slide on the outside circumferential surface 3c of the punch 3 as the punch 3 moves. When the punch 3 moves in the direction of receding from the die 2, the removing mechanism 4 removes the cutting wastes 6a of the braid 6 in a chunk from the punch 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shielded wire braiding apparatus, and more specifically, a shielded wire braiding apparatus capable of reliably removing cutting waste generated by cutting a braid exposed at a terminal portion of a shielded wire. And a braiding processing method.

  Generally, a shielded wire includes a conductor, an inner coating that insulates the outer peripheral surface of the conductor, a conductive braid that covers the outer peripheral surface of the inner coating, and an outer coating that insulates the outer peripheral surface of the braid. It is prepared for. In order for this shielded wire to be electrically connected to the electric circuit, the outer sheath, the braid, and the inner sheath of the terminal portion of the shielded wire are cut to a predetermined length, and the conductor is exposed. It is processed as follows. However, since the braid is formed by knitting a plurality of thin and flexible conductive wires, the cutting waste generated by cutting the braid adheres to the cutting member, preventing the next braid from being cut. It may become.

As a conventional apparatus and processing method for cutting a braid, a shielded wire processing apparatus and a shielded wire processing method for automatically cutting a braid are known (for example, see Patent Document 1). Moreover, regarding the processing of the cutting waste of the cut braid, there is known a processing method and a braiding processing apparatus for cutting waste that tear and cut the cutting waste (for example, see Patent Document 2).
JP 2001-357960 A (pages 4 to 11, FIGS. 14 to 15) JP 2001-119832 (pages 3-4, FIGS. 7-8)

  The shielded wire processing apparatus disclosed in Patent Document 1 is an automatic machine that automatically cuts the outer coating, the braid, and the inner coating sequentially while conveying the shielded wire. To cut the braid, press the braid against the inner cover repeatedly several times with the braid opening claw, gradually increase the diameter of the braid outwardly, and then insert an annular punch (punch) between the braid and the inner cover The braid is cut into a circular shape by the punch and the die. After cutting the braid, the shield wire is pulled out from the die, but the braided cutting waste remaining in the die at that time is moved from the die to the waste box by the vibration generated by operating the braid opening claw adjacent to the die several times. Shake off.

  In addition, the braiding processing device disclosed in Patent Document 2 is a two loosening machine that cuts a braid into a circular shape by a cylindrical inner blade (punch) and an outer blade (die) and locks the cut waste. The claw is driven by an actuator, the cutting waste is torn apart in the circumferential direction, and is sucked and collected by a suction hood.

  According to the shielded wire processing apparatus and the shielded wire processing method disclosed in Patent Document 1, the braided cutting waste adhering to the inside of the die can be removed, but regarding the removal when the cutting waste adheres to the punch side, Not listed. If cutting debris adheres to the punch side, the cutting debris may interfere with the cutting of the next braid, and such cutting debris adhering to the punch side will maintain a certain level of shielded wire quality after processing. It is not preferable to maintain the above.

  According to the method of tearing and collecting the cutting waste by the braiding processing device disclosed in Patent Document 2 when the cutting waste is short, it can be easily disassembled and recovered, but when the cutting waste is long There is a high possibility that the decomposition will be insufficient and remain on the inner blade and the outer blade. Moreover, when tearing the cutting waste, the cutting waste that is disassembled and finely scattered scatters to the surroundings, which may cause a failure of the braiding processing apparatus and deteriorate the working environment.

  The present invention has been made in view of the above-described circumstances, and its purpose is to reliably remove the cutting waste after cutting the braid of the shielded electric wire and to cut due to the cutting waste remaining in the braid processing apparatus. An object of the present invention is to provide a braided processing apparatus and a braided processing method for shielded wires that can prevent the occurrence of defects such as defects.

  In order to achieve the above-mentioned object, a shielded wire braiding apparatus according to the present invention is characterized by the following (1) to (3).

(1) A die having an insertion hole for inserting the terminal portion where the braid of the shielded wire is exposed, and a cutting edge provided at the edge of the insertion hole;
Driven in a direction to be inserted into and removed from the insertion hole of the die, enters between the braid of the shielded electric wire inserted through the insertion hole and the inner coating, and cooperates with the cutting edge of the die. A punch having a cutting blade for cutting the braid into a circular shape,
A removal mechanism arranged to slidably contact the outer peripheral surface of the punch as the punch moves;
With
The removal mechanism removes the braided cutting debris cut by the cutting blade of the die and the cutting blade of the punch and adhered to the punch from the punch when moving in the direction in which the punch is removed from the die. To do.
(2) In the braiding processing apparatus characterized by the above (1), the removal mechanism has a plate-like member arranged so that a tip end portion is in sliding contact with the outer peripheral surface of the punch.
(3) In the braiding processing apparatus characterized in (2) above, a notch portion that is slidably contacted with the outer peripheral surface of the punch is formed at the center of the tip portion of the plate-like member.

In addition, in order to achieve the above-described object, the braided processing method for shielded wires according to the present invention is as follows:
The braid exposed from the terminal part by removing the outer coating of the terminal part of the shielded electric wire is cut into a ring shape by the cutting edge of the die and the cutting edge of the tip of the punch,
Separate the punch and the die,
The punch and the removal mechanism are relatively moved, and the braided cutting waste adhering to the distal end portion of the punch is removed from the punch so as to be pushed out from the proximal end side of the punch by the removal mechanism. .

  According to the braided processing apparatus for shielded wires according to the present invention, the cutting scraps of the braid that are cut into a ring shape by the cutting blades provided on the die and the punch and attached to the punch in the direction in which the punch is removed from the die. Since the removal mechanism arranged so as to slidably contact the outer peripheral surface of the punch when moving, it is removed from the punch in a lump state, so that the cutting waste can be reliably removed. Thereby, cutting failure caused by cutting waste remaining in the punch is prevented, and a shielded electric wire having a terminal portion with stable quality can be provided.

  Further, the removing mechanism has a plate-like member arranged so that the front end portion is in sliding contact with the outer peripheral surface of the punch, and when the punch moves in the direction of removing from the die, the ring-like shape attached to the punch Since the cutting waste is scraped off from the punch so as to be pushed out at the tip portion and removed in a lump state, the cutting waste can be reliably removed with a simple removal mechanism regardless of the length of the cutting waste.

  Further, a notch portion that is in sliding contact with the outer peripheral surface of the punch is formed at the center of the tip portion of the plate member, and the plate member slides reliably on the outer peripheral surface of the punch, Since the end face branched into two at the front end protrudes on both sides of the punch, it comes into contact with the two pieces of ring-shaped cutting waste adhering to the punch. As a result, it is possible to secure a wider contact area and disperse the force acting on the cutting waste, so even a flexible braid prevents excessive deformation of the cutting waste and reliably removes the cutting waste. be able to.

  Further, according to the braided processing method for a shielded electric wire according to the present invention, the braid exposed from the end portion of the shielded electric wire by removing the outer coating of the end portion of the shielded electric wire The punch and die are separated from each other, the punch and the removal mechanism are moved relative to each other, and the braided cutting waste adhering to the tip of the punch is pushed from the punch by the removal mechanism from the base end side of the punch. Since it removes in a lump state, cutting waste can be reliably removed with a simple mechanism. Thereby, cutting failure caused by cutting waste remaining in the punch is prevented, and a shielded electric wire having a terminal portion with stable quality can be provided.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an embodiment of a braiding processing apparatus according to the present invention, and FIGS. 2 to 4 are diagrams of a braiding processing apparatus for explaining a process in which braiding of shielded wires is sequentially processed by the braiding processing apparatus. FIG. 5 is a longitudinal sectional view and FIG. 5 is an enlarged view of a main part of the braiding processing apparatus.

  As shown in FIG. 1, the braid processing apparatus 1 includes a braid cutting unit 1a, a drive unit 1b, and a control unit 1c. The control unit 1c is composed of a well-known CPU (ie, Central Processing Unit), ROM (ie, Read Only Memory), etc. (all not shown), and controls the operation of the drive unit 1b composed of a motor or the like. Then, the operation control of the braid cutting part 1a is performed.

  Here, with reference to FIGS. 2 to 4, a series of operation examples of the braid cutting unit 1a, the driving unit 1b, and the control unit 1c will be described. For example, when the braid excision part 1a senses that the shielded electric wire 5 is inserted into the braid excision part 1a, it outputs an operation signal to the control part 1c. The control unit 1c outputs a drive signal to the drive unit 1b based on the input operation signal. The drive unit 1b drives the punch 3 of the braid cutting unit 1a based on the input drive signal. The punch 3 is driven in a direction to cut the braid 6 exposed at the terminal portion of the shielded electric wire 5 in cooperation with the die 2 of the braid cutting portion 1 a and then to remove from the die 2.

  As shown in FIGS. 2 to 5, the braid cutting unit 1 a of the braid processing apparatus 1 includes a die 2, a punch 3, a removal mechanism 4, and a shooter 11.

  The die 2 is for cutting the braid 6 exposed at the end portion of the shielded electric wire 5 into a predetermined length in cooperation with the punch 3 and is formed of cemented carbide or the like. The base 10 is fixed. The die 2 is provided with an annular insertion hole 2 a through which the terminal portion of the shielded electric wire 5 is inserted.

  The insertion hole 2a has a small-diameter portion 2b on the punch 3 side and a large-diameter portion 2c on the opposite side of the small-diameter portion 2b, and is formed in a tapered shape. The braided shielded wire 5 is formed from the large-diameter portion 2c side. The terminal part with 6 exposed is inserted. The inner diameter of the small-diameter portion 2b is formed slightly larger than the outer diameter of the braid 6 so that the end portion of the shielded electric wire 5 exposing the braid 6 can be inserted. Further, a cutting edge 2d is provided on the inner peripheral edge of the small diameter portion 2b.

  The punch 3 is for cutting the braid 6 exposed at the end of the shielded electric wire 5 into a predetermined length in cooperation with the die 2 and is made of cemented carbide or the like. The punch 3 is formed in a substantially truncated cone shape (that is, a cone shape with the tip cut off) so as to taper from the base end portion toward the tip portion engaged with the insertion hole 2 a of the die 2. Is arranged so that the central axis of the second die coincides with the central axis of the insertion hole 2 a of the die 2. The punch 3 is provided with an accommodation hole 3 b for accommodating the inner coating 8 of the shielded electric wire 5 along the central axis of the punch 3.

  The front end portion of the punch 3 is formed so that its outer diameter is slightly smaller than the small diameter portion 2 b of the insertion hole 2 a of the die 2 and its inner diameter is slightly larger than the outer diameter of the inner coating 8 of the shielded electric wire 5. Moreover, the cutting edge 3a is provided in the front-end | tip outer periphery. The base end portion of the punch 3 is connected to the driving portion 1b. The punch 3 is inserted in the insertion hole 2a of the die 2 (in the direction of arrow A in FIG. 2) and in the removal direction (in the direction of arrow B in FIG. 3). ) Is movably driven.

  The removal mechanism 4 is for removing the cutting waste 6a of the braid 6 that has been cut and adhered to the punch 3 from the punch 3, and drops it onto the shooter 11 to collect it. The plate-like member 13, the hinge 14, And is provided vertically above the punch 3.

  The plate-like member 13 is swingably supported by the side wall 11 a of the shooter 11 by a hinge 14, and a notch that engages with the outer peripheral surface 3 c of the punch 3 is provided at the approximate center of the tip portion 13 a of the plate-like member 13. A portion 13b is provided. The notch 13 b is formed in a substantially U shape corresponding to the outer shape of the punch 3. End surfaces 13c and 13c of the tip portion 13a of the plate-like member 13 branched into two forks across the notch portion 13b project to both sides of the punch 3.

  The plate-like member 13 is disposed so that the notch portion 13b of the tip portion 13a is in contact with the outer peripheral surface 3c of the punch 3, and the end surfaces 13c and 13c of the tip portion 13a are directed to the tip portion of the punch 3. 3 is slightly swung by the elastic force of the spring 15 so that the notch 13b is always in sliding contact with the outer peripheral surface 3c of the punch 3 as the arrow 3 moves in the direction of arrow A and arrow B.

  A hole 11b is provided in the side wall 11a of the shooter 11 fixed to the base 10 of the braiding processing apparatus 1, and the punch 3 can pass through the hole 11b and move in the direction of arrow A and arrow B. It is like that.

  Next, the operation of the braid processing apparatus 1 will be described.

  As shown in FIG. 1 and FIG. 2, the shield wire 5 has a terminal portion outer sheath 7 cut in advance, the braid 6 of the terminal portion is exposed, and a large diameter portion 2 c of the insertion hole 2 a of the die 2. Is inserted into the braid cutting part 1a of the braid processing apparatus 1, and the braid 6 is disposed so as to protrude from the small diameter part 2b of the insertion hole 2a to the punch 3 side with a predetermined length. At this time, the shielded electric wire 5 is held by a holding device (not shown) so that the central axis of the terminal portion thereof coincides with the central axis of the insertion hole 2 a of the die 2 and the punch 3.

  If necessary, after expanding the diameter of the braid 6 in an appropriate manner (for example, repeatedly pressing the braid against the inner coating several times with a braid opening claw as disclosed in Patent Document 1), The driving unit 1 b is operated to drive the punch 3 in the direction of arrow A, and the cutting edge 3 a of the punch 3 is caused to enter between the braid 6 and the inner coating 8. Thereby, the inner coating 8 is accommodated in the accommodation hole 3 b of the punch 3, and the braid 6 slides on the outer peripheral surface 3 c of the punch 3 and is separated from the inner coating 8. Then, the punch 3 is moved in the direction of arrow A until the braid 6 is held between the cutting edge 3a of the punch 3 and the cutting edge 2d of the die 2, and the punch 3 is further moved in the direction of arrow A from this state. The braid 6 is cut (sheared) into a circular shape (that is, substantially cylindrical) by the cutting blade 3a of the punch 3 and the cutting blade 2d of the die 2.

  Next, as shown in FIG. 3, when the shielded electric wire 5 is pulled out from the die 2 in the direction of arrow D, the cutting waste 6 a of the braid 6 cut into a ring shape adheres to the punch 3 in a suspended state. When the driving unit 1 b is operated to move the punch 3 in the direction of arrow B, the cutting waste 6 a attached to the punch 3 also moves in the direction of arrow B together with the punch 3. A removal mechanism 4 is provided vertically above the punch 3, and the removal mechanism 4 swings the plate-like member 13 by the elastic force of the spring 15 so that the notch 13 b of the plate-like member 13 is moved to the outer periphery of the punch 3. While always in sliding contact with the surface 3 c, the tip 13 a of the plate-like member 13 is moved relatively toward the tip of the punch 3 as the punch 3 moves in the direction of arrow B. Eventually, the cutting waste 6 a comes into contact with the end surfaces 13 c and 13 c of the plate-like member 13 of the removing mechanism 4, and thereafter is held by the end surfaces 13 c and 13 c without moving in the arrow B direction together with the punch 3.

  As shown in FIG. 4, when the punch 3 is further moved in the arrow B direction from the state in which the cutting waste 6 a is in contact with the end faces 13 c of the plate-like member 13 of the removal mechanism 4, the cutting waste 6 a is removed from the removal mechanism 4. The plate-like member 13 is pushed from the base end side in the direction of the distal end portion of the punch 3 relatively by the end faces 13c, 13c, falls into the shooter 11 in the direction of arrow E, and is removed from the punch 3.

  The distance X between the die 2 and the punch 3 when the punch 3 is completely retracted in the direction of the arrow B (that is, moved to the standby position ST side) is set longer than the length L of the cutting waste 6a. Therefore, the cutting waste 6 a is reliably pushed out of the punch 3 without falling between the punch 3 and the die 2, falls in the direction of arrow E, and is collected by the shooter 11.

  Thus, the processing of the braid 6 of the terminal portion of the shielded electric wire 5 is completed.

  As described above, the braid processing apparatus 1 has the insertion hole 2a for inserting the terminal portion where the braid 6 of the shielded electric wire 5 is exposed, and the cutting edge 2d is provided at the edge of the insertion hole 2a. The die 2 is driven so as to be movable in a direction to be inserted into and removed from the insertion hole 2a of the die 2, and enters between the braid 6 of the shielded electric wire 5 inserted into the insertion hole 2a and the inner coating 8, and the die 7 The punch 3 having a cutting edge 3a that cuts the braid 6 into a ring shape in cooperation with the cutting edge 2d of the punch 3 and the removal disposed so as to be in sliding contact with the outer peripheral surface 3c of the punch 3 as the punch 3 moves. The removal mechanism 4 is cut by the cutting blade 2d of the die 7 and the cutting blade 3a of the punch 3 and the punch 3 removes the cutting waste 6a of the braid 6 attached to the punch 3 from the die 7. When moving in the direction, remove it as a lump from the punch 3 Since, it is possible to surely remove the cutting debris 6a. Thereby, the cutting defect which the cutting waste 6a remains in the punch 3 is prevented, and the shielded electric wire 5 having the terminal portion with stable quality can be provided.

  Further, when the removal mechanism 4 has a plate-like member 13 arranged so that the tip end portion 13a is slidably contacted with the outer peripheral surface 3c of the punch 3, and when the punch 3 moves in a direction to be removed from the die 2, Since the cut piece 6a in the shape of a ring adhering to the punch 3 is scraped off from the punch 3 so as to be pushed out by the tip portion 13a and removed in a lump state, the structure of the simple removal mechanism 4 is ensured regardless of the length of the cut piece 6a. The cutting waste 6a can be removed.

  In addition, a notch 13b that is in sliding contact with the outer peripheral surface 3c of the punch 3 is formed at the center of the tip 13a of the plate-like member 13, and the plate-like member 13 is on the outer peripheral surface 3c of the punch 3. Since the end surfaces 13c and 13c branched into the fork of the tip end portion 13a project on both sides of the punch 3, the two end surfaces come into contact with the ring-shaped cutting waste 6a attached to the punch 3. As a result, it is possible to secure a wider contact area and disperse the force acting on the cutting waste 6a, so that even the flexible braid 6 prevents excessive deformation of the cutting waste 6a and reliably cuts the cutting waste. 6a can be removed.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, the plate member 13, the hinge 14, and the spring 15 constituting the removal mechanism 4 may be a single plate spring. Thereby, the removal mechanism 4 can be made a simpler structure.

It is a block diagram which shows the structure of the braided processing apparatus of the shield wire which concerns on this invention. It is a longitudinal cross-sectional view of the braid processing apparatus which shows a mode that the braid of a shield electric wire is cut | disconnected by the braid processing apparatus. It is a longitudinal cross-sectional view of the braid processing apparatus which shows the state by which the shield electric wire from which the braid was cut was pulled out from the braid processing apparatus. It is a longitudinal cross-sectional view of the braid processing apparatus which shows a mode that the braid of a shielded electric wire is removed by the braid processing apparatus. It is a principal part enlarged view of a braiding processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Braid processing apparatus of shielded electric wire 2 Dice 2a Insertion hole 2d Cutting blade (die side)
3 Punch 3a Cutting edge (Punch side)
3c punch outer peripheral surface 4 removal mechanism 5 shielded wire 6 braiding 6a cutting waste 7 outer coating 8 inner coating 13 plate member 13a tip 13b notch 13c end surface L length of cutting scrap ST standby position X between punch and die Separation distance

Claims (4)

A die having an insertion hole for inserting the terminal portion where the braid of the shielded wire is exposed, and a die provided with a cutting blade at the edge of the insertion hole;
Driven in a direction to be inserted into and removed from the insertion hole of the die, enters between the braid of the shielded wire inserted through the insertion hole and the inner coating, and cooperates with the cutting edge of the die. A punch having a cutting blade for cutting the braid into a circular shape,
A removal mechanism arranged to slidably contact the outer peripheral surface of the punch as the punch moves;
With
The removal mechanism removes the braided cutting debris cut by the cutting edge of the die and the cutting edge of the punch and adhered to the punch from the punch when moving in the direction in which the punch is removed from the die. A braided processing apparatus for shielded electric wires.   The braided processing apparatus for a shielded electric wire according to claim 1, wherein the removing mechanism includes a plate-like member arranged so that a tip end portion is in sliding contact with the outer peripheral surface of the punch.   The braided processing apparatus for a shielded electric wire according to claim 2, wherein a notch portion that is in sliding contact with the outer peripheral surface of the punch is formed in the center of the tip portion of the plate-like member. The braid exposed from the terminal part by removing the outer coating of the terminal part of the shielded electric wire is cut into a ring shape by the cutting edge of the die and the cutting edge of the tip of the punch,
Separate the punch and the die,
The punch and the removal mechanism are relatively moved, and the braided cutting waste adhering to the distal end portion of the punch is removed from the punch so as to be pushed out from the proximal end side of the punch by the removal mechanism. A method for braiding a shielded wire.

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