JPH0412598B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a method for processing an end portion of a covered electric wire.

Prior Art Conventionally, when processing the terminals of coated wires, when cutting the wires, stripping the sheathing, and crimping the terminals using a fully automatic machine, the terminals are attached immediately after stripping, which makes the terminal positions accurate. When attaching terminals to stripped wires using another machine or attaching other parts, the following drawbacks occurred. That is, when stripping the covered wire using a hand tool or the like, the length of the conducting wire portion of the strip portion varies, so that it cannot be processed uniformly. After cutting the covered wire with another machine tool,
If the coating is removed from the terminal portion, the conductor portion at the tip is likely to become disordered, and the length of the strip may also be difficult to make uniform, which may cause irregularities in subsequent terminal attachment. In addition, when processing a shielded wire, the outer sheath is a metal wire, so it is relatively difficult to cut, and the center conductor part is particularly easy to disturb. It tends to be uneven. As described above, conventional processing tends to cause irregularities in the conductor parts, making it difficult to regulate the strip length of the covering part to a constant length, which causes product variations.

OBJECTS OF THE INVENTION Therefore, an object of the present invention is to accurately set the strip length of a covered wire, thereby making it possible to attach terminals accurately, and to determine the attachment position of an insulating annular body such as a grommet. The goal is to enable accurate regulation.

SUMMARY OF THE INVENTION Accordingly, in the present invention, the tip of the covered wire is cut off in the step of stripping the covered wire, and a predetermined strip length is determined using this cut off position as a reference for length measurement. Therefore, even if the core wire at the tip is disordered or bent, the strip length of the covered wire can be accurately regulated each time it is processed. Therefore, when an insulating annular body or the like is inserted into the covered wire in advance or a crimp terminal is fixed, the relative position of the annular body or crimp terminal and the strip portion can be accurately regulated.
This makes it possible to uniformly process the ends of the covered wires.

Structure of the Invention Hereinafter, embodiments of the present invention will be specifically described based on the drawings.

The wire end processing device 1 includes an insertion device 2, a pair of cutters 3, a pair of stripping cutters 4, and a crimping device 5.

The covered wire 6 to be processed is supplied to a supply chuck 7.
It is held in place by, for example, a guide and guided to a predetermined position as shown in FIG. On the other hand, grommet,
An insulating annular body 8 such as a sinculator or a sleeve is fed out to a predetermined supply position in an aligned state by, for example, a chute 9 of a parts feeder. Therefore, for example, an air-type chuck holder 10 of the insertion device 2 adsorbs the annular body 8 at the tip by vacuum suction, rotates about 90 degrees about the shaft 11, and then moves in the direction of the covered wire 6. . At this time, the annular body 8 is inserted at a position a predetermined distance DO from the tip of the covered wire 6, as shown by the imaginary line. In this way, the process of inserting the annular body 8 into the covered wire 6 is completed. Note that the annular body 8 may be held by any means such as press-fitting, clamping with claws, etc. in addition to vacuum suction.

Next, the supply chuck 7 moves the covered wire 6 together with the annular body 8 to the stripping process position, and brings the tip of the covered wire 6 into contact with the stripper 12 as shown in FIG. In this stripping process, the cutter 3 and the stripping cutter 4 are operated. That is, the pair of cutters 3 cut off the tip portion of the covered wire 6 at a distance D1 from the surface of the stopper 12. At the same time or after this, a pair of stripping cutters 4 cut the outer covering 6a of the covered wire 6 at a distance D2 from the cutters 3.
After that, the stripping cutter 4 is inserted into the cutter 3.
and stopper 12, arrow A in FIG.
move in the direction. As a result, the covering 6a is stripped off from the covered wire 6. In this way, the conductor 6b of the covered wire 6 has a length corresponding to the distance D2, that is, a constant strip length.
As shown in FIG. 3, it becomes a strip state. As the cutter 3 cuts off the tip of the insulated wire 6 a little, even if the tip of the insulated wire 6 is uneven, the strip length (distance D2) can be adjusted between the cutter 3 and the strip. It is precisely regulated by the distance D2 from the cutter 4. Note that the strip of the coating 6a is cutter 3, strip cutter 4, and stopper 1.
With 2 stopped, supply chuck 7 to 2nd
This can also be done by moving in the direction of arrow B in the figure.

Next, the coated wire 6 after this stripping process
is fed into that position or to a new crimping position, and the pair of crimping dies 13 of the crimping device 5
It is fixed to the crimp terminal 14 by. Specifically, the pair of crimping dies 13 crush the conductor barrel portion of the crimp terminal 14, thereby fixing the crimp terminal 14 to the end of the covered wire. In this way, the crimp terminal 14 is electrically connected to the stripped conductor 6b. The sheathing barrel portion of the crimp terminal 14 also holds the sheathing 6a portion of the sheathed wire 6,
It is also fixed to the covered electric wire 6. At this time, the insulating annular body 8 may be crimped at the same time in order to enhance the waterproof effect at the crimped portion of the covered portion of the crimp terminal 14. In this case, since the length of the strip from the tip is constant, the position of the annular body 8 can be accurately regulated, and this is an extremely useful crimping method. In this manner, the covered wire 6 is automatically attached to the crimp terminal 14 at its end portion through the stripping process and the crimping process.
Thereafter, the continuous crimp terminal 14 is separated from the succeeding crimp terminal 14. Next, the supply chuck 7 opens the covered wire 6 and sends it out to a predetermined supply position.

Since the length of the strip and the insertion position of the annular body 8 are accurately regulated in this way, the end of the covered wire 6 can be processed efficiently and uniformly. In particular, after the annular body 8 is inserted, the annular body 8 is crimped, or when the annular body 8 is further crimped by the covered barrel portion of the crimp terminal 14 during the crimping process of the crimp terminal 14 to increase the waterproof effect. In this case, since the length of the strip and the insertion position of the annular body 8 are accurately regulated, ideal crimping is possible. Further, since the annular body 8 is inserted before the stripping process of the covered wire 6, the conductive wire 6a etc. are not disturbed by the insertion and are electrically connected to the crimp terminal 14 reliably.

Note that the cross section of the annular body 8 may be any shape such as circular or square, and the material thereof is not limited to an insulator, but may be a metal conductor.

Furthermore, immediately after cutting the tip of the covered wire and stripping it, the core wire, that is, the conductor wire 6a, is less disturbed and unraveled, and the annular body 8 as described above can be easily inserted. Furthermore, when the annular body 8 is crimped together with the covering 6a using the covering barrel of the crimp terminal 14, there is an advantage that positioning can be done in one step.

As a device for performing the above-mentioned insertion operation, the insertion operation may be performed after stripping in the above-mentioned device.

Effects of the Invention In the present invention, the tip of the insulated wire is always cut off in the stripping process, so even if the cut surface of the insulated wire is irregular or locally bent, the strip length can be adjusted by the cutter and It can be accurately regulated by the distance from the stripping cutter, and therefore electrical connection and mechanical fixation with the crimp terminal are ensured, and automatic processing is facilitated. In particular, before stripping,
Since the annular body is inserted into the tip of the covered wire,
There is no disturbance of the conductor (core wire) of the covered wire during the insertion process, and there is no variation in dimensions. Since the relative position between the annular body and the crimp terminal is accurately determined, the annular body and the crimp terminal can be joined together by caulking or the like automatically and accurately by a mechanical device.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the insertion device of the wire end processing device of the present invention, FIG. 2 is a front view of the cutter portion of the device, FIG. 3 is a side view of the covered wire after stripping, and FIG. 4 FIG. 2 is a schematic side view of the crimping device. DESCRIPTION OF SYMBOLS 1... Wire end processing device, 2... Insertion device, 3... Cutter, 4... Strip cutter, 5... Crimping device, 6... Covered wire to be processed, 7... Supply chuck, 8... Annular body, 9... Parts feeder chute, 10... chuck holder, 11... shaft, 12...
Stopper, 13...Crimp die, 14...Crimp terminal.

Claims (1)

[Claims] 1. After inserting the annular body into the tip of the insulated wire, cut the tip of the insulated wire with a cutter, and then use a stripping cutter facing the cutter at a distance equal to the strip length to cut the end of the insulated wire from the cut end. A method for processing an electric wire end, which comprises stripping a coating corresponding to the length of the strip, and then fixing a crimp terminal to the conductor in the strip portion by crimping.