JP2001231124A - Method and apparatus for inverting braid of shielded wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently invert a braid in the end process of a shielded wire and also insert an earth terminal after inversion of braid. SOLUTION: A braid (b) exposed at a terminal portion of a shielded wire W is widened by inserting a guide pipe between the braid and internal insulator. Thereafter, an inversion pipe 5 engaged with the guide pipe 6 is relatively slid to squeeze the braid (b) that is widened with the inversion pipe 5 or the earth terminal GT pushed toward the inversion pipe 5. As a result, the braid (b) is inverted on the external sheath (a) of the wire W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braid reversing method and a braid reversing method for efficiently performing braid reversal in terminal processing of a shielded wire and terminal fitting when a ring-shaped terminal is mounted on the braid after the reversal. Related to the device.

[0002]

2. Description of the Related Art In the terminal processing of a shielded electric wire (hereinafter sometimes simply referred to as an electric wire), an insulating jacket, a conductive braid inside thereof, and an internal insulator covered by the braid are separately provided. Strip the required length and attach the terminal to the exposed center conductor.

[0003] In the braid exposed at the terminal, the remaining part may be turned over on the outer jacket of the electric wire. Also,
For terminals that perform this inversion processing, a ground terminal may be attached on the inverted braid.

By the way, in the reversing process of the braid, the exposed end of the braid is lifted from the internal insulator by pressing with a punch or the like, and then the sheath expanding pipe is inserted between the braid and the internal insulator. Then, the braid exposed by the pipe is expanded (turned up), the braid reversing member divided into two parts is then closed, and the braid expanded by the braid reversing member surrounding the electric wire is squeezed to wrap the jacket. It was done in the way of flipping it up.

[0005] Also, the mounting of the ground terminal has been performed after the braid is turned over.

[0006]

The above-described method of reversing the braid requires a mechanism for individually moving the sheath expanding pipe and the braid reversing member in the longitudinal direction of the electric wire, a mechanism for opening and closing the braid reversing member, and the like. In addition, there is a problem that the equipment becomes wasteful in the production of various kinds of products in small quantities, the operation steps of the apparatus increase, the processing time becomes long, and it is difficult to improve the productivity.

In addition, when the ground terminal is attached, the electric wire after the braid reversal process is transferred to the next processing station, where the terminal is inserted again, and this work flow also lowers productivity. Cause.

Accordingly, the present invention provides a braid reversing method capable of reliably and efficiently reversing a braid with a minimum number of man-hours and, if necessary, simultaneously fitting a ground terminal, and a simple reversing device for executing the method. It is intended to be.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a guide pipe is provided between a braid of a shielded electric wire whose exposed portion is peeled off and an inner insulator of the electric wire. A method is adopted in which the braid that has been inserted and exposed is expanded, and then the braid that has been expanded with an inversion pipe that is slidably fitted on the guide pipe is squeezed and inverted on the outer jacket of the electric wire.

[0010] Further, as for the terminal portion for attaching the ground terminal, after the braid is expanded by the guide pipe, a ring-shaped ground terminal externally fitted to the guide pipe by an inverted pipe fitted slidably on the guide pipe is connected to an electric wire. Then, the braid expanded by the ground terminal is squeezed, and the braid is spread over the outer surface of the electric wire so as to complete the inversion of the braid and the insertion of the ground terminal at the same time.

Further, a braid reversing device for performing these methods includes the guide pipe and the reversing pipe, a holder block for mounting the reversing pipe, and a spring for urging the guide pipe, and receives a force of the spring. The guide pipe is installed inside the reversing pipe so that it can come and go.

In the apparatus for reversing the braid with the reversing pipe, the inner diameter of the reversing pipe is made slightly larger than the outer diameter of the wire after the reversal of the braid.

Further, the device for reversing the braid with the ground terminal is designed so that the ground terminal can be fitted to the guide pipe projecting portion from the reversing pipe.

An apparatus that satisfies both of these two conditions can selectively execute the two methods, thereby expanding its use.

[0015] In addition, the electric wire may be moved by an operator by hand, but the apparatus of the present invention is provided with a clamp for holding the shielded electric wire at the processing center and a relatively close approach between the clamp and the holder block. The processing can be performed easily by adding a moving mechanism for separating. The moving mechanism may be a manual type or a power driven type. For multi-product small-quantity production, a manual type is sufficient, and for mass production, a power-driven type is preferable.

It is also preferable to include a stopper capable of adjusting the position for restricting the amount of guide pipe immersion.

[0017]

[Function] After inserting the guide pipe inside the braid, slide the inverted pipe relative to it and push it out of the guide pipe, and the braid expanded to the inverted pipe or the ground terminal pushed by the inverted pipe is squeezed. When the ground terminal is used, the terminal is inserted at the same time. Therefore,
The work can be completed in one action, there is no useless operation, the tact time can be reduced, and the processing efficiency can be improved.

In the apparatus for executing this method, the guide pipe urged by a spring is pushed by an electric wire to be immersed in the reversing pipe, and the braid reversal is performed by using the relative movement at that time. A mechanism to move the inverted pipe individually, a mechanism to open and close the divided parts, a mechanism to transfer the electric wire to the ground terminal insertion station, a terminal insertion machine, etc. are not required, simplifying the structure and thereby reducing equipment costs. In addition, the processing time can be reduced by reducing the number of operation steps.

[0019]

1 and 2 show an embodiment of a braid reversing device according to the present invention.

In FIG. 1, reference numeral 1 denotes a clamp for holding the shielded electric wire W at a processing center. This clamp 1 has a base plate 2
It is provided on the slider 3a of the linear guide 3 provided thereon so as to be able to advance and retreat in the longitudinal direction of the electric wire W. The illustrated clamp 1 is a manual toggle clamp, but may use an air chuck having a driving source.

4 is a base plate 2 facing the clamp 1
The holder block 5 disposed above is a reversing pipe fixed to the holder block 4, 6 is a guide pipe incorporated in the reversing pipe 5 so as to be able to protrude and retract, and 7 is a guide for urging the guide pipe 6 so as to be in front of the reversing pipe 5. A stopper bolt for stopping the guide pipe 6 at the immersion end point;
Reference numeral 10 denotes a stopper for the clamp 1, and reference numeral 11 in FIG. 2 denotes a jig for positioning the electric wire terminals.

The jig 11 includes a backing plate 1 against which the end of the electric wire abuts.
1a. The contact plate 11a is provided with a hinge pin 11b.
Can be rotated around the fulcrum, and can be retracted from the positioning point. Further, the backing plate 11a is provided on a rack and a pinion stage 11d which rotate and rotate the knob 11c so that position adjustment in the longitudinal direction of the electric wire can be performed.

Reversing pipe 5 attached to holder block 4
Has a slightly larger inner diameter than the wire diameter after braid reversal.

Further, the guide pipe 6 has a tapered outer periphery at the distal end in order to improve the penetration of the inside of the braid and to apply a preferable expanding force to the braid. The amount of immersion of the guide pipe 6 into the reverse pipe 5 can be changed by adjusting the amount of screwing of the stopper bolt 8.

The stopper 9 is provided to eliminate the fear that the clamp 1 may move excessively and collide with the reversing pipe 5 or the like, thereby damaging the part of the collision partner. However, this is not essential. .

The braid reversing device constructed as described above is used as follows.

That is, first, the electric wire W which has been subjected to the terminal preparation (stripping of the jacket, cutting of the braid, and spreading of the remaining braid tip) has been completed.
Is positioned and held by the clamp 1, and then the clamp 1 is pushed toward the holder block 4.

By this operation, as shown in FIG. 3, the guide pipe 6 is inserted between the braid b of the electric wire W and the internal insulator c, and the exposed portion of the braid b is pushed and expanded at the tip of the pipe. Thereafter, when the electric wire W is further pushed in, the guide pipe 6 compresses the spring 7 and sinks into the inverted pipe 5, and the inverted pipe 5 comes out instead of the pipe 6. At this time, the reversing pipe 5 squeezes the expanded braid b to reverse it on the jacket a of the electric wire W, and the processing is completed at a position where the guide pipe 6 hits the stopper bolt 8.

FIGS. 5 and 6 show a ring-shaped ground terminal GT.
Are simultaneously inserted. In this case, the ground terminal GT is set on the guide pipe 6 in advance. Thereafter, the electric wire W held by the clamp is pushed to move the guide pipe 6 into the inside of the braid b (FIG. 5), and the pushing is continued until the guide pipe is immersed in the inverted pipe 5.

As a result, the ground terminal GT is pushed onto the jacket of the electric wire W by the reversing pipe 5, and at this time, the ground terminal GT squeezes the expanded braid b and turns it over the jacket a. As shown in FIG. 6, the terminal insertion is completed at the position where the guide pipe 6 hits the stopper holder 8, and the wire cannot be pushed any further. Therefore, if the stopper bolt 8 is provided, the insertion position of the ground terminal is fixed, and there is no variation in product quality.

The ground terminal GT inserted on the jacket
Then, it is fixed to the electric wire by caulking or the like. At the time of caulking, in order to prevent the clamping force from escaping by the terminal, a ring R is previously fitted on the jacket a of the electric wire W, the braid b is inverted on the ring R, and the ground terminal GT is provided on the outside thereof.
May be attached, but also in this case, the braid reversal and the terminal insertion can be performed by the above operation.

In the illustrated device, the clamp 1 is pushed and moved by hand, but the relative movement between the clamp holding the electric wire and the holder block is performed using a power-driven moving mechanism using a cylinder actuator or the like as a driving source. Is also good.

It is also possible to hold the electric wire by hand and insert it manually into the guide pipe.

[0034]

As described above, according to the method of the present invention, the braid is expanded by inserting the guide pipe into the inside, and then the braid is reversed by the reversing pipe which moves relatively. And inversion in one behavior,
The processing efficiency can be increased without wasting the processing operation.

Further, when the ground terminal is pushed by the reversing pipe and the braid is reversed at the ground terminal, the insertion of the ground terminal is completed at the same time, and the processing is further streamlined.

Further, according to the device of the present invention, the guide pipe urged by the spring is pushed into the reversing pipe with the electric wire to perform relative movement between the guide pipe and the reversing pipe for reversing the braid. As a result, equipment costs can be reduced and machining time can be shortened by reducing the number of operation steps.
The effect of cost reduction can be brought about.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a braid reversing device of the present invention.

FIG. 2 is an end view of the same device as seen from a clamp side.

FIG. 3 is a diagram showing an initial state of braid inversion by an inversion pipe;

FIG. 4 is a diagram showing a completed state of braid reversal by a reversing pipe;

FIG. 5 is a diagram showing an initial state of braid reversal by a ground terminal;

FIG. 6 is a diagram showing a completed state of braid reversal by a ground terminal;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 3 Linear guide 4 Holder block 5 Reversing pipe 6 Guide pipe 7 Spring 8 Stopper bolt 11 Wire end positioning jig W Shielded wire b Braid c Internal insulator GT Earth terminal

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshio Yoneya 1-7-10 Kikuzumi, Minami-ku, Nagoya F-term in Harness Research Institute, Inc. (reference) 5G323 EA02 5G355 AA05 BA04 CA06

Claims (6)

[Claims] 1. A guide pipe is inserted between a braid of a shielded electric wire, which is exposed at a terminal portion by peeling a jacket, and an inner insulator of the electric wire, thereby expanding the exposed braid. A braided reversal method of a shielded electric wire, characterized in that a braid expanded by a reversing pipe fitted to be relatively slidable is squeezed and reversed on a sheath of the electric wire. 2. A guide pipe to be inserted between a braid of a shielded electric wire, which is exposed to a terminal portion by peeling a jacket, and an inner diameter of the electric wire, which is slightly larger than an outer diameter of the electric wire after the inversion of the braid. A reversing pipe, and a holder block for mounting the reversing pipe. The guide pipe is urged by a spring to be incorporated inside the reversing pipe so as to be freely retractable. A braided reversing device for a shielded electric wire, wherein the braided member is immersed in the inside, is replaced with a guide pipe, and comes out in front, and the braid expanded by the guide pipe is squeezed and inverted on the outer jacket of the electric wire. 3. A guide pipe is inserted between the braid of the shielded electric wire, which is exposed at the terminal portion by peeling the jacket, and the exposed braid is expanded by inserting the guide pipe, and then the guide pipe is placed on the guide pipe. A ring-shaped ground terminal fitted onto the guide pipe is pushed onto the electric wire with a reversing pipe fitted relatively slidably onto the electric wire, and the braid expanded at the ground terminal is squeezed and inverted on the electric wire jacket. Shielded wire braid reversal method. 4. A guide pipe to be inserted between a braid of a shielded electric wire exposed at a terminal portion by peeling a jacket and an internal insulator of the electric wire, an inverted pipe for receiving one end of a ring-shaped ground terminal, and an inverted pipe. The guide pipe is urged by a spring to be incorporated inside the reversing pipe so as to be able to protrude and retract, and the guide pipe inserted inside the braid is pushed by an electric wire so as to be immersed in the reversing pipe. Push the ring-shaped ground terminal fitted onto the guide pipe onto the electric wire with a reversing pipe that comes out in front of the wire, and squeeze the braid expanded by the guide pipe with this ground terminal and invert it on the outer jacket of the electric wire Braid reversing device for shielded wires. 5. The apparatus according to claim 2, further comprising a clamp for holding the shielded electric wire at the processing center, and a moving mechanism for relatively moving the clamp and the holder block closer to and away from each other. 6. The shielded wire braid reversing device according to claim 2, further comprising a position-adjustable stopper for regulating the amount of immersion of the guide pipe.