JP2000092645A - Jig for folding braided wires of shielded wires and method for folding braided wires - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a folding operation of braided wires. SOLUTION: An operation for folding braided wires 4 of shielded wires 1 at an outer peripheral side of a skin 5 can be simply conducted by using a special purpose jig 10. That is, the skin 5 is released from end parts of the wires 1 to expose the wires 4, and an end part of an enlarged member 20 of the jig 10 for folding the braided wires is inserted thereinto. Since an outer peripheral oblique part 21 having an oblique angle of 45 degrees or less and an inner peripheral oblique part 22 having a slight taper are provided at the end part, the member 20 can be easily inserted between an insulating coating 3 and the wires 4, and an enlarging operation of the wires 4 can be simply executed. Since the oblique angle of the part 21 is 20 degrees or more, enlargement of the wires 4 can be increased, and the folding operation of the wires 4 via a folding cylindrical member 11 to be subsequently conducted can be simply executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig and a method for folding a braided wire of a shielded electric wire toward an outer periphery of an outer cover.

[0002]

2. Description of the Related Art Conventionally, in order to connect a braided wire of a shielded electric wire to a shield shell of a connector housing, there is a method of using a shielded electric wire having a braided wire turned around on the outer peripheral side of a sheath.

[0003] Specifically, a shielded electric wire has a core wire covered with an insulating coating, and the outer periphery thereof is covered with a braided wire formed by a woven metal wire, and an outermost outer sheath made of an insulating resin. It is configured to be arranged. In order to fold the braided wire in such a shielded electric wire, conventionally, the following was performed. First, the end of the outer sheath of the shielded wire is cut off to expose the braided wire, and the end of the shielded wire is set on a braided wire loosening machine. The braided wire loosening machine is provided with two rotary metal brushes side by side, and the tip portions of both metal brushes come into contact with the braided wire of the shielded electric wire. In this state, by rotating both metal brushes in the opposite directions toward the distal end side of the shielded electric wire, the woven metal wires forming the braided wires are loosened, and a substantially straight state is obtained. Thereafter, the loosened fine metal wire is manually folded back to the outer peripheral side of the outer skin, thereby completing the braided wire folding operation.

[0004]

However, if the braided wire is unraveled using a metal brush as described above, and then the braided wire is turned back by hand, the number of processes is increased, and the accompanying cost increase can be avoided. Did not.

Further, when the braided wire is folded, the thin metal wire is loosened and separated, so it is difficult to fold the wire manually, and furthermore, it is necessary to fold all the thin metal wires in order to prevent a short circuit or the like. Was bad. The present invention has been completed on the basis of the above circumstances, and has as its object to simplify the operation of folding a braided wire.

[0006]

According to a first aspect of the present invention, there is provided a shielded electric wire in which a braided wire is covered by an insulating coating covering a core wire, and the outside is covered by an outer cover. In the method for folding back the braided wire exposed by cutting off the outer skin at the distal end to the outer periphery of the distal end of the remaining outer skin, the expanding member fitted to the outer periphery of the insulating coating is covered with the insulating coating and the braided wire. By inserting and pushing in between, the braided wire is expanded, and by pushing the folded tubular member fitted to the outer periphery of the outer skin against the expanded braided wire,
It is characterized in that the braided wire is folded down to the outer peripheral side of the outer skin while being pushed down.

According to a second aspect of the present invention, there is provided a jig for performing the above method, wherein the jig can be fitted around the outer periphery of the insulation coating and is inserted between the insulation coating and the braided wire to form the braided wire. It is characterized by comprising an expanding member for expanding, and a folded tubular member that can be fitted to the outer periphery of the outer skin and is folded down to the outer peripheral side of the outer skin while pushing down the expanded braided wire.

According to a third aspect of the present invention, in the second aspect of the present invention, the distal end of the outer peripheral surface of the expanding member is formed obliquely, and the distal end of the expanding member is sharpened by providing the outer peripheral inclined portion. It is characterized by its shape.

A fourth aspect of the present invention is characterized in that, in the third aspect of the present invention, the inclination angle between the outer peripheral inclined portion of the expanding member and the axial direction of the expanding member is set to 40 degrees or more and 45 degrees or less. A fifth aspect of the present invention is characterized in that, in any one of the second to fourth aspects of the present invention, the distal end edge of the inner peripheral surface of the expanding member is formed obliquely to provide an inner peripheral inclined portion. A sixth aspect of the present invention is characterized in that, in any one of the second to fifth aspects of the present invention, the expanding member is formed in a cylindrical shape and is slidably held in the folded cylindrical member. According to a seventh aspect of the present invention, in any one of the second to sixth aspects, the expanding member is slidably held in the folded tubular member via the elastic member, and the elastic member is deformed. Accordingly, a characteristic is that the distal end portion of the expanding member can be displaced from a position protruding from the folded tubular member to a position retracted into the folded tubular member.

[0010]

<Operation and Effect of the Invention><Inventions of Claims 1 and 2>

[0011] It is assumed that the braided wire is exposed by previously removing the outer end of the shield wire. At the end of the shielded wire, insert the expanding member of the jig for folding back the braided wire between the insulating coating and the braided wire and push it into the back. It is expanded to a distant cylindrical shape. Subsequently, the end of the folded tubular member is applied to the braided wire in the expanded state and is pushed inward, so that the braided wire is pushed down to the outer peripheral side of the outer skin while being folded at the leading end of the outer skin, and the folded tubular member is folded. And the outer skin. That is, the operation of folding the braided wire of the shielded wire to the outer peripheral side of the outer cover can be easily performed by pushing the jig for folding back the braided wire into the terminal portion of the shielded wire. <Invention of Claim 3>

Since the outer peripheral inclined portion is provided at the distal end portion of the expanding member, the distal end portion of the expanding member is easily inserted between the insulation coating of the shielded electric wire and the braided wire, so that the expanding member can smoothly enter. Done. Further, since the braided wire that has been expanded is likely to have a trumpet shape along the outer peripheral inclined portion, the work of reversing the braided wire using the folded tubular member can be easily performed. <Invention of Claim 4>

When the angle of inclination of the outer peripheral inclined portion is 45 degrees or less, the work of inserting the leading end portion of the expanding member between the insulating coating and the braided wire becomes easier, and the braided wire is easily separated from the insulating coating. Become. In addition, the inclination angle of the outer peripheral inclined portion is
By making the degree or more, the tip side of the braided wire separated from the insulating coating becomes larger and the metal thin wire becomes a rough trumpet shape and the tip side becomes soft,
The work of reversing the braided wire by the folded tubular member is facilitated. <Invention of claim 5>

By providing the inner peripheral inclined portion at the tip of the expanding member, the inner peripheral side of the expanding member is covered with the insulating coating when the expanding member is sunk between the insulating coating of the shielded electric wire and the braided wire. Is not caught on the end of the expansion member, so that the operation of pushing the expanding member is more easily performed. <Invention of claim 6>

Since the expanding member is housed in the folded tubular member, the jig for folding the braided wire can be made compact. <Invention of Claim 7>

[0016] After inserting the distal end portion of the expanding member protruding outside the folded tubular member between the insulation coating of the shielded electric wire and the braided wire, pushing the folded tubular member toward the shielded electric wire, The braid is stretched away from the insulation. When the leading end of the expanding member abuts the outer skin via the braided wire, only the folded tubular member advances while the elastic member is elastically compressed. As a result, the distal end portion of the folded tubular member abuts against the expanded braided wire, and the braided wire is pushed down to the outer peripheral side of the outer skin while being folded back from the distal end portion of the outer skin. When the braided wire is folded and the shielded wire is pulled out of the jig for folding the braided wire, the elastic member is elastically restored and the expanded member held in the folded tubular member has its distal end again outside. Is projected.

That is, by pushing the folded tubular member toward the shielded wire, the work of folding the braided wire can be easily performed, and after the completion of the folding work, the expanding member is elastically deformed so that the tip end portion protrudes. As a result, the shield wire can be continuously folded back.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In this embodiment, a jig for folding back the braided wire 4 of the shielded electric wire 1 for connecting to a shield shell of a connector housing is shown. First, the structure of the shielded electric wire 1 will be described. As shown in FIG. 1, this shielded electric wire 1 has a core wire 2 made of a metal wire covered with an insulating coating 3 made of an insulating resin material, and a braided wire formed by braiding a thin metal wire around the core wire 2. 4 is provided so as to cover the outer periphery of the insulating coating 3, and the outer periphery of the braided wire 4 is further covered with an outer skin 5 made of an insulating resin material. This shielded wire 1
In the terminal portion, only the outer skin 5 is peeled off by a predetermined width, and the braided wire 4 exposed by this peeling is folded back to the outer peripheral side of the outer skin 5.

In the shielded electric wire 1 as described above, a jig 10 having a structure as shown in FIG. 2 is used to turn the braided wire 4 toward the outer periphery of the outer cover 5. This jig 10
A cylindrical expanding member 20 is slidably held inside a cylindrical folded member 11 via an elastic spring 13 which is an elastic member.

The folded cylindrical member 11 is made of, for example, a synthetic resin material or a metal material, and has an elastic spring 13 therein.
The stopper 1 attached to the opening of the rear end of the folded cylindrical member 11
2. The distal end portion of the folded tubular member 11 is formed such that the distal end edge of the outer peripheral surface is formed obliquely so that the inner peripheral side protrudes forward. The inner diameter of the folded tubular member 11 is set slightly larger than the outer diameter of the outer sheath 5 of the shielded electric wire 1, and when the folded tubular member 11 is fitted to the outer sheath 5, there is a slight gap between the two. And the braided wire 4 can enter the gap.

In the folded cylindrical member 11, an expanding member 20 is provided in front of the elastic spring 13 in contact with the front end thereof. The expanding member 20 is always urged forward by the elastic spring 13, and is expanded by a locking portion (not shown) provided on the expanding member 20 being locked to the folded tubular member 11. The forward movement of the opening member 20 is regulated, and in this state, the distal end portion of the expanding member 20 projects forward of the folded tubular member 11. The resilient spring 13 allows the expanding member 20 to be elastically slidable in the front-rear direction in the folded tubular member 11. Also, the expanding member 2
The inner diameter of 0 is set to be substantially the same as the outer diameter of the insulating coating 3 of the shielded electric wire 1 so that the expanding member 20 can be fitted to the insulating coating 3 exactly.

As shown in an enlarged view in FIG. 3, the distal end portion of the expanding member 20 is formed so as to chamfer the peripheral edge of the outer peripheral surface, so that an outer peripheral inclined portion 21 is provided. The inclination angle formed by the outer peripheral inclined portion 21 with respect to the axial direction of the expanding member 20 is set to, for example, 40 degrees or more and 45 degrees or less. In addition, the distal end portion is provided with an inner peripheral inclined portion 22 so as to chamfer the distal end edge of the inner peripheral surface, and the inclination width of the inner peripheral inclined portion 22 is larger than the inclination width of the outer peripheral inclined portion 21. It is small and slightly tapered. By the outer peripheral inclined portion 21 and the inner peripheral inclined portion 22, the distal end of the expanding member 20 has a pointed shape at a position deviated to the inner peripheral side.

This embodiment has the above-described structure, and its operation will be described below. First, shielded wire 1
1, only the outer skin 5 is peeled off by a predetermined width as shown in FIG. 1 to expose the braided wire 4 to the outside. A jig 10 for folding back the braided wire 4 shown in FIG. 3 is inserted from the front of the terminal portion of the shielded electric wire 1.

As shown in FIG. 4, a pointed head 23 which forms a distal end portion of an expanding member 20 protruding forward of the folded cylindrical member 11.
Is inserted between the braided wire 4 of the shielded electric wire 1 and the insulating coating 3. At this time, the inner peripheral inclined portion 2 is provided on the inner peripheral side of the pointed head 23.
Since a slight taper is formed by the provision of 2, the pointed tip 23 is easily sunk under the braided wire 4. When the jig 10 is pushed in and the expanding member 20 is advanced forward with the pointed head 23 sunk between the braided wire 4 and the insulating coating 3, the braided wire 4 is peeled from the insulating coating 3. It is expanded. At this time, the outer peripheral inclined portion 21 is provided on the outer peripheral side of the pointed head 23, so that the expanding member 20 enters smoothly.

Here, in the present embodiment, the outer peripheral inclined portion 21
Since the inclination angle is set to 40 degrees or more and 45 degrees or less,
The operation of expanding the braided wire 4 can be easily performed, and the braided wire 4 can be greatly expanded.

When the insertion of the expanding member 20 is completed,
As shown in FIG. 5, the pointed head 23 abuts on the distal end portion of the outer cover 5 with the braided wire 4 interposed therebetween. From this state, jig 1
0 is pushed forward, the elastic spring 13 pushing the expanding member 20 is compressed and deformed, and the folded cylindrical member 1 is pressed.
Only 1 moves forward, and the leading end of the folded tubular member 11 abuts against the base of the expanded braided wire 4.

When the jig 10 is further pushed in, as shown in FIG. 6, the expanded braided wire 4 is pushed down while being folded back to the outer peripheral side of the outer cover 5 by the folded tubular member 11.
The state is sandwiched between the inner peripheral surface of the folded tubular member 11 and the outer peripheral surface of the outer cover 5.

When the jig 10 is fully pushed in,
After the braided wire 4 is completely folded as shown in FIG.
0 is removed from the shielded electric wire 1. Then, the elastic spring 13 that has been compressed and deformed is elastically restored, and the expanding member 20 that has receded into the folded tubular member 11 has the distal end portion forward of the folded tubular member 11 as shown in FIG. It naturally returns to the state where it protrudes. Thus, the operation of folding back the braided wire 4 of the shielded electric wire 1 can be performed continuously.

As described above, according to the present embodiment,
The operation of folding the braided wire 4 of the shielded electric wire 1 to the outer peripheral side of the outer cover 5 can be easily performed by pushing the jig 10 into the end portion of the shielded electric wire 1. Jig 1
In the distal end portion of the expanding member 20 of FIG.
Since the pointed tip 23 is formed at a position deviated to the inner peripheral side by providing the inner peripheral inclined portion 22 and the inner peripheral inclined portion 22, the tip of the expanding member 20 can easily sink under the braided wire 4. In addition, the braided wire 4 can be expanded while being easily turned.

In particular, when the inclination angle of the outer peripheral inclined portion 21 is set to 45 degrees or less, the work of expanding the braided wire 4 becomes easier, and when the inclination angle is set to 40 degrees or more, the braided wire 4 is further expanded widely. And the subsequent turn-up tubular member 1
The operation of turning back the braided wire 4 by 1 can be performed more easily. Further, since the expanding member 20 is housed in the folded tubular member 11, the jig 10 can be made compact. <Other embodiments>

The present invention is not limited to the embodiment described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further depart from the gist other than the following. Various changes can be made without departing from the scope of the present invention. (1) In the present embodiment, the expanding member 20 has a cylindrical shape. However, the present invention is not limited to this. A plurality of thin claws are arranged in a ring shape, and these claws are fitted on the outer periphery of the insulating coating 3. It may be configured as follows. (2) Further, the outer peripheral inclined portion and the inner peripheral inclined portion may be provided as needed, and are not essential.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shielded electric wire according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a shield wire and a jig.

FIG. 3 is an enlarged view of a tip portion of a jig.

FIG. 4 is a partially cutaway side view showing a state in which a distal end portion of an expanding member is inserted between an insulating coating and a braided wire.

FIG. 5 is a partially cutaway side view showing a state where insertion of the folded tubular member into the expanded braided wire has been started;

FIG. 6 is a partially cutaway side view showing a state in which the folded tubular member pushes down the braided wire.

FIG. 7 is a partially cutaway side view showing a state where the braided wire is folded back to the outer peripheral side of the outer cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shield electric wire 3 ... Insulation coating 4 ... Braided wire 5 ... Outer skin 10 ... Jig (braided wire folding jig) 11 ... Folded cylindrical member 12 ... Stopper 13 ... Elastic spring (elastic member) 20 ... Expanding member 21 ... Slope of outer circumference 22 ... Slope of inner circumference 23 ... Point

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tadashi Miyazaki 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Inside Harness Research Institute, Inc. No. 14 Sumitomo Wiring Systems, Inc. F-term (reference) 5G319 EB01 EC06 5G355 AA05 BA04 CA01

Claims (7)

[Claims] 1. A shielded electric wire in which a braided wire is covered by an insulating coating covering a core wire and the outside is covered by a cover, the outer cover of which is exposed by cutting off the outer cover at the tip and leaving the cover. A method for folding the braided wire to the outer periphery of the front end of the braided wire by inserting and pushing in an expanding member fitted to the outer circumference of the insulating coating between the insulating coating and the braided wire. Then, by pushing a folded cylindrical member fitted to the outer periphery of the outer sheath into the expanded braided wire, the shielded wire is characterized in that the braided wire is folded down to the outer peripheral side of the outer sheath while pushing down the braided wire. Braided line folding method. 2. A shielded wire in which a braided wire is covered on an insulating coating covering a core wire and an outer periphery of the shielded wire is covered with an outer sheath, wherein the braided wire exposed by cutting off the outer sheath at the tip is left. A jig for folding back to the outer peripheral side of the outer end of the outer cover, the jig being capable of being fitted to the outer periphery of the insulating coating and being inserted between the insulating coating and the braided wire to expand the braided wire. A shielded electric wire, comprising: an expanding member, and a folded tubular member that can be fitted to the outer periphery of the outer cover and is folded back to the outer peripheral side of the outer cover while pushing down the expanded braided wire. Braided wire folding jig. 3. The front end of the expanding member has a pointed shape by forming a slant at the front end edge of the outer peripheral surface of the expanding member and providing an outer peripheral inclined portion. The jig for folding a shielded electric wire according to claim 2. 4. The braid of a shielded electric wire according to claim 3, wherein the inclination angle of the outer peripheral inclined portion of the expanding member with respect to the axial direction of the expanding member is set to 40 degrees or more and 45 degrees or less. Jig for wire turning. 5. The inner peripheral surface of the expanding member according to claim 2, wherein a peripheral edge of an inner peripheral surface is formed obliquely and an inner peripheral inclined portion is provided. A jig for braiding shielded electric wires. 6. The shielded electric wire according to claim 2, wherein the expanding member is formed in a cylindrical shape, and is slidably held in the folded cylindrical member. Braided wire folding jig. 7. The expanding member is slidably held in the folded tubular member via an elastic member, and as the elastic member is deformed, the distal end portion of the expanding member is The braided wire of a shielded electric wire according to any one of claims 2 to 6, wherein the braided wire is capable of being displaced from a position protruding from the folded tubular member to a position retracted into the folded tubular member. Folding jig.