JP2001211521A - Wire holding method and holding device for wire terminal process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire holding method and a wire holding device so that a wire terminal process can be performed correctly and efficiently. SOLUTION: A guide roller 5 to operate as a wire guide is installed before a chuck 2 holding a wire A at the machining center and mounted on a slide arm 3 mounted on a clamp paw 2A of the chuck. The slide arm 3 is biased by a spring 4 and thrust to the end side of the wire A. The end side of the wire A is held at the machining center by the guide roller 5. And while the wire A is processed, the slide arm 3 is pressed by a back plate 21 of the process device side, thereby guide roller 5 is retreated to the position so as not to obstruct the process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire holding method and an electric wire holding device which enable accurate and accurate processing of electric wires without trouble.

[0002]

2. Description of the Related Art When a terminal is attached to a covered electric wire, for example,
It is necessary to peel off a part of the coating to expose the conductor at the terminal. A device that mechanized this terminal processing holds the positioned electric wire with a chuck, and in this state, makes a pair of skinning blades facing each other at the end of the electric wire to make an annular cut in the coating, and then, the skinning blade The wire and the electric wire are relatively moved and the cut coating is pulled out with a razor blade, and most of the devices adopt the method for peeling.

[0003] The end processing of an electric wire is generally completed through a plurality of steps. For example, a single-core coated electric wire requires at least two steps of peeling and terminal attachment. For the shielded electric wire and the multi-core coated electric wire, it is necessary to peel off the braid and the inner insulator after stripping the outer skin, which further increases the number of processing steps.

[0004] In order to perform the plurality of processes efficiently, processing stations divided for each process are arranged in parallel, and the electric wires processed in the previous processing station are held in the chucks in the subsequent processing station while being held by the chuck. A method is adopted in which the workpiece is moved and processing is performed in a flow operation.

[0005]

Problems to be solved in the end processing of electric wires are processing errors and equipment troubles due to unstable support of the ends of the electric wires.

[0006] When the electric wire is held by the chuck, the electric wire is held at a certain distance from the front end of the electric wire so that the chuck does not hinder the processing. In many cases, the centering and the positioning of the end of the wire become insufficient.

[0007] In such a situation, for example, if a razor blade is inserted, the internal insulator, braid or conductor that does not need to be cut will be damaged. In addition, if the ends of the electric wires are not properly positioned, the stripping length and the like will be out of order. In addition, when the misalignment is significant, troubles may occur in the processing equipment, such as interference between the wires and the device when transferring to the next processing station and the transfer is stopped.

An object of the present invention is to provide an electric wire holding method and an electric wire holding device in terminal processing that are effective in eliminating such processing errors and equipment troubles.

[0009]

In order to solve the above-mentioned problems, according to the present invention, an electric wire guide is provided in front of a chuck for holding an electric wire at a processing center, and the electric wire guide is advanced and processed when the electric wire is not processed. The wire is sometimes retracted, and the leading end of the wire away from the clamping point by the chuck is held at the processing center by the wire guide that has been advanced during non-processing.

Further, when processing stations divided for each process are arranged in parallel, and the electric wire processed in the preceding processing station is moved to the subsequent processing station while being held by the chuck, and the processing is carried out in a flow operation. In this method, the forward end of the wire is held at the processing center by the wire guide which is advanced even when moving between the processing stations.

The electric wire holding device used to execute the above method is a chuck that clamps the electric wire with opposing clamp claws and holds the electric wire at the center of processing, and the clamp claws of the chuck are slidable in the longitudinal direction of the electric wire. , A spring for moving the slide arm to a forward position, and an electric wire guide provided on the slide arm, wherein the electric wire guide is formed by a guide roller attached to the tip of each slide arm. It is preferable to hold the wire at the processing center by holding the front end side of the wire, and to further include a transfer device that moves the chuck, slide arm, and wire guide from the preceding processing station to the subsequent processing station. .

[0012]

According to the method and apparatus of the present invention, the wire guide provided in front of the chuck is advanced during non-machining, and the leading end of the wire separated from the chuck is held at the center of machining by the wire guide. Processing errors are reduced. In addition, the tip of the electric wire during the transition is prevented from sagging, and interference with the processing device is reliably prevented. Further, since the wire guide is retracted toward the chuck when processing the wire, there is no hindrance to the processing.

In addition, a device in which a slide arm for moving forward by spring force is attached to a claw of a chuck and a guide roller serving as an electric wire guide is attached to the slide arm does not require a dedicated opening / closing drive mechanism for the electric wire guide. The structure and control of the device are not complicated.

[0014]

1 and 2 show an embodiment of the present invention. The illustrated electric wire holding device 1 includes an air chuck 2 that holds a covered electric wire (hereinafter simply referred to as an electric wire) A on a processing center by gripping the electric wire A with a pair of opposing clamp claws 2a, and an electric wire gripper on each of the clamp claws 2a of the chuck. A slide arm 3 slidably mounted in the longitudinal direction, a spring 4 for urging the slide arm to project toward the distal end of the electric wire A,
It comprises a guide roller 5 hanging down from the tip of each slide arm and a transfer device 6 for moving these elements between a plurality of processing stations arranged in parallel.

The transfer device 6 includes a linear rail 8
Slider 9 that guides and moves to each processing station
And the index plunger 1 on the slider 9
It shows a case where 0 is provided. Each processing station is provided with a bush 11, and the pin 9a at the bottom of the index plunger 10 is fitted to the bush 11 to position the slider 9 at each processing station.

The movement of the slider 9 is performed by a well-known driving device (not shown) using a ball screw mechanism, a linear motor, an endless chain, or the like.

The chuck 2 is provided on the slider 9, and the electric wire A is held between the chuck 2 and the guide rollers 5,5.

The clamp 2a of the chuck 2 is shown in FIG.
As shown in (a), the grip surface has a V groove 2b,
The wire A is centered at the processing center by the centripetal effect of the groove 2b.

As shown in FIG. 3 (b), the guide roller 5 uses a roller whose center is narrowed. Therefore, a centripetal effect is also generated at the gripping portion by the guide roller 5, and the electric wire A is almost also formed at this portion. Centered on the processing center. The guide roller 5 moves together when the clamp claw 2a of the chuck 2 closes to loosely clamp the electric wire A.

When no external force is applied (for example, at the time of setting or transition between processing stations), the slide arm 3 is moved toward the distal end of the electric wire A by the force of the spring 4 as shown in FIGS. Protrude. Therefore, the electric wire A is held by the guide roller 5 on the distal end side of the electric wire, so that the end of the electric wire is prevented from sagging.

Reference numeral 21 in FIG. 1 denotes a backing plate on the processing apparatus 20 side provided in each processing station. This backing plate 21
It is connected via a pin 24 to a support plate 23 erected on the slider 22.

The slider 22 is guided by a linear guide 26 provided on a base plate 25, and is driven by a cylinder 27 to advance and retreat in the longitudinal direction of the electric wire.

Various processing units (not shown) for processing electric wires are attached to the support plate 23. The support plate 23 of the processing station at the forefront stage may be provided with an electric wire insertion guide 28 divided into two parts and a guide pipe 29 for positioning the electric wire end.

FIGS. 4 (a) and 4 (b) show a method of setting the electric wire A at the first processing station provided with an electric wire insertion guide 28 having an opening / closing drive mechanism and a guide pipe 29 which is advanced and retracted by a cylinder 30 or the like. Is shown.

The chuck 2 is unclamped, the processing device 20, a part of which is shown in FIG. 1, is advanced toward the holding device 1, and the slide arm 3 is retracted by the backing plate 21 of the device.
Further, the electric wire insertion guide 28 is closed, and the guide pipe 29 is moved to the positioning point. Then, in this state, the tip of the electric wire A is guided by the electric wire insertion guide 28 to guide the guide pipe 29.
(FIG. 4 (a)). When the electric wire hits the end of the guide hole of the pipe, the chuck 2 is closed to complete the setting (FIG. 4 (b)).

Thereafter, the guide pipe 29 is retracted,
As shown in FIG. 5, the first processing, that is, the outer skin is stripped by inserting the skin stripping blade 31 into the electric wire A. In addition, when the electric wire A is a shielded electric wire, the tip side of the braid exposed by peeling the outer skin is beaten from the outside with a punch of the expanding unit, and is loosened.
It bends outward and expands.

Thereafter, the electric wire insertion guide 28 is opened, the processing device is retracted, and the pushing of the slide arm 3 by the backing plate 21 is released. As a result, as shown in FIG. 2, the holding point of the guide roller 5 moves to the front end side of the electric wire, and the electric wire A is moved to the next processing station together with the holding device 1 while maintaining this state. When the movement is completed, the processing device of the next processing station moves forward, and the slide arm 3
Is pressed again into the backing plate, and the terminal processing is performed by the next processing device.

In the case where the transfer of the electric wire is unnecessary, or
When processing is performed by replacing the processing device instead of transferring the electric wire, the transfer device 6 may be omitted and the chuck 2 may be installed at a fixed position. The method and apparatus of the present invention are particularly effective when transferring electric wires between processing stations, but also when processing without transfer, prevention of processing errors,
Processing accuracy can be improved.

As shown in FIGS. 1 and 2, when the slide arm 3 is pulled by the spring 4, the apparatus can be prevented from becoming complicated and the cost can be increased. However, the slide arm 3 can be moved forward and backward by a cylinder actuator or the like.

The wire guide provided at the tip of the slide arm is preferably a roller in terms of protecting the wire (preventing surface damage), but is not limited to the roller.

[0031]

As described above, in the method and apparatus according to the present invention, since the front end of the electric wire that cannot be held by the chuck is held at the center of the processing by the electric wire guide that can be retracted at the time of terminal processing, the processing due to the misalignment of the electric wire. It is possible to eliminate transfer troubles due to failures and interference with equipment, reduce the failure occurrence rate,
It is possible to improve the operation rate of the processing equipment, improve the reliability of products manufactured by terminal processing, and reduce costs.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a holding device of the present invention.

FIG. 2 is a plan view of the above device.

FIG. 3A is a diagram illustrating a gripping state of an electric wire by a claw of a chuck. FIG. 3B is a diagram illustrating a gripping state of an electric wire by a guide roller.

FIG. 4A is a view showing an example of a set state of an electric wire; FIG.

FIG. 5 is a diagram showing an example of terminal processing of an electric wire;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire holding device 2 Chuck 2a Clamp claw 3 Slide arm 4 Spring 5 Guide roller 6 Transfer device 9 Slider 21 Patch plate A Insulated wire

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshio Yoneya 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi F-term in Harness Research Institute, Inc. (reference) 5G355 AA03 BA08 CA02

Claims (4)

[Claims] An electric wire guide is provided in front of a chuck for holding an electric wire at a processing center, the electric wire guide is advanced when the electric wire is not processed, and is retracted when the electric wire is not processed. A method for holding an electric wire in the end processing of an electric wire in which a distal end side of a distant electric wire is held at a processing center. 2. The electric wire which has been processed in the former processing station is moved to the latter processing station while being held by the chuck, and even during the movement, the front end of the electric wire is held in the processing center by the electric wire guide. The method for holding an electric wire in the end processing of the electric wire according to claim 1. 3. A chuck for clamping an electric wire at the center of processing by clamping an electric wire with an opposing clamp claw, a slide arm slidably attached to each clamp claw of the chuck in a longitudinal direction of the electric wire, and moving the slide arm to a forward position. It has a spring to be moved and an electric wire guide provided on the slide arm. The electric wire guide is formed by a guide roller attached to the tip of each slide arm. The guide roller sandwiches the distal end of the electric wire and holds it at the processing center. An electric wire holding device in terminal processing of electric wires. 4. The electric wire holding apparatus according to claim 3, further comprising a transfer device for moving the chuck, the slide arm, the arm moving means, and the electric wire guide from the preceding processing station to the subsequent processing station.