JP2002095126A - Method of opening tip of braided shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for opening the tip of a braided shield easily and quickly before the braided shield is processed in the termination of a shielded cable. SOLUTION: After an outer covering of a shielded cable 4 is removed, the end of the shielded cable 4 is inserted into a wire introducing hole 2 formed in a braid compressing tool 1. At that time, the tip of a braided shield 6 is received by the braid compressing tool 1 which compresses the exposed part of the braided shield 6 in the longitudinal direction of the cable to open the tip of the braided shield.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for expanding the end of a braided shield, which makes it easier and quicker to finish a shielded cable.

[0002]

2. Description of the Related Art A shielded cable has a structure in which an insulated wire is covered with a braided shield, and the outside is covered with a jacket. In the end processing of this shielded cable, the braided shield exposed after stripping the sheath is cut to a predetermined length, and then the uncut braided shield is turned over on the jacket,
Insert a reinforcing ring inside the braided shield to receive the caulking force of the ground terminal. In order to perform these operations, the exposed end of the braided shield is first expanded appropriately. In order to automate the step of expanding the tip, a method has been devised and put to practical use, in which the braided shield is loosened by hitting the braid with a punch from the outside and bent outward to open the tip.

[0003]

In the conventional method described above, the punch is hit at several places while intermittently rotating the punch along the outer periphery of the cable. In some cases, the above operation is repeated by moving the punch in the longitudinal direction of the cable.

In the case of this method, the processing time per terminal takes at least about 10 seconds, and it is difficult to meet the demand for further high-speed processing.

In the braided shield having the open end, a braided opening pipe is inserted inside to open the entire exposed portion. However, in the conventional end spreading method, the opening is locally formed. In addition, the work is required even when the reinforcing ring is inserted, and there is a problem that the number of steps is increased.

Therefore, an object of the present invention is to make it possible to quickly expand the tip of the braided shield by a simple operation, and at the same time to make it possible to raise the entire exposed braided shield from the inner insulated wire. And

[0007]

To solve the above object, according to an aspect of, in the present invention, the terminal portion of the shielded cable finishing strip envelope, than the outer diameter D ₁ of the insulated wire on the inside of the braided shield Large diameter, ΔD ₁ + (shield wire diameter x
2) The cable is inserted into a wire introduction hole smaller in diameter than｝, and the braided shield exposed at the cable end is compressed and expanded in the longitudinal direction of the cable by a braid compression tool having the wire introduction hole.

[0008] This method, when inserting the shielded cable,
It is preferable that the cable end is guided toward the wire introduction hole by the tapered hole provided in the braid compression device, so that the cable can be smoothly and reliably inserted into the wire introduction hole.

Further, if a wire stopper for contacting the cable end is provided, and the position of the wire stopper is changed to adjust the amount of compression of the braided shield, the braided shield can be changed even when the stripping length of the jacket is changed. The compression can be appropriately performed.

[0010]

The braided shield compressed and shrunk in the longitudinal direction of the cable has the entire exposed portion lifted up from the inner insulated wire, swelling like a lantern, and its tip expanding. The swelling due to compression is slightly reduced when the cable is pulled out of the braid compression device, but is maintained after the cable is pulled out, whereby the expanded state of the braided shield tip is maintained.

[0011] According to this method, the braided shield is completely compressed and expanded only by relatively moving the braided compression tool and the shielded cable in the longitudinal direction of the cable. Therefore, the processing time per terminal can be reduced to almost half (about 5 seconds) as compared with the conventional method of hitting with a punch, and the apparatus to be used can be simplified.

Further, since the entire area of the exposed braided shield rises and a gap is formed between the insulated electric wire, the reinforcing ring can be inserted inside by eliminating a further expanding step by the braided expanding pipe. Become.

[0013]

FIG. 1 shows an embodiment of the method of the present invention. 1 in FIG. 1A is a braided compression tool having a preferable shape. The braid compression tool 1 is provided with an electric wire introduction hole 2 and a tapered hole 3 connected thereto.

The tapered hole 3 is not an essential element, but if it is present, misalignment due to the hole is corrected, and the cable can be inserted smoothly and reliably.

[0015] the inner diameter d ₁ of the wire introducing hole 2 is greater than the diameter D ₁ of the insulated wire 5, less than {D ₁ + (diameter × 2 shield wires 6a)}. Reference numeral 6 denotes a braided shield formed by knitting the shield wires 6a, and reference numeral 7 denotes a cable jacket.

Reference numeral 8 denotes an electric wire stopper for abutting the distal end of the shielded cable 4 and has a position adjusting mechanism (not shown) in the longitudinal direction of the cable.

As shown in FIG. 1A, the jacket of the end portion of the shielded cable 4 is stripped off by a predetermined length, and the stripped end portion is guided by a tapered hole 3 to guide the wire introduction hole 2. Insert This operation can be performed by moving the braid compression tool 1, but in this case, it is necessary to move the shielded cable 4 because the wire stopper 8 also needs to be moved together.

Immediately before the insulated wire 5 guided to the tapered hole 3 enters the wire introduction hole 2, the tip of the braided shield 6 abuts against the inner surface of the tapered hole 3. It is compressed in the direction and swells as shown in FIG.

The amount of shrinkage of the braided shield 6 at this time can be freely changed by changing the position of the wire stopper 8 for receiving the cable end. Bulges on.

Thereafter, the shielded cable 4 is pulled out of the braid compression device. As a result of the release of the force, the contracted braided shield 6 slightly expands to slightly reduce the bulge. However, the braided shield once expanded does not return to its original shape, and the mouth is opened as shown in FIG. State is maintained.

The opening of the end of the braided shield is completed as described above.

[0022]

As described above, according to the method of the present invention, it is only necessary to insert the shielded cable from which the terminal has been peeled off into the braided compression tool and pull it out. Higher speed and simplification of the expansion device can be achieved, thereby reducing processing costs.

Further, since the entire area of the exposed braided shield floats up from the inner insulated wire, it is possible to insert a reinforcing ring on the lower side by omitting a further expanding step by a braided expanding pipe, thereby simplifying terminal processing. It has the effect of improving the efficiency and efficiency.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) Process drawing showing an embodiment of the method of the present invention (b) Process drawing showing an embodiment of the method of the present invention (c) Process drawing showing an embodiment of the method of the present invention

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Braid compression tool 2 Electric wire introduction hole 3 Tapered hole 4 Shielded cable 5 Insulated electric wire 6 Braided shield 6a Shielded wire 7 Jacket 8 Wire stopper

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuyuki Itaya 1-7-10 Kikuzumi, Minami-ku, Nagoya F Harness Research Institute F-term (reference) 5G355 AA03 BA04 BA08 CA06

Claims (3)

[Claims] 1. The terminal portion of the shielded cable, which has been stripped, is connected to the outer diameter D _{1 of the} insulated wire inside the braided shield.
The braided shield is inserted into the wire introduction hole with a diameter larger than that of {D ₁ + (shield wire diameter x 2)}, and the braided shield exposed at the cable end with a braid compression tool having the wire introduction hole is used to extend the cable length. A method of expanding the tip of the braided shield, which is expanded and contracted in the direction. 2. The method according to claim 1, wherein, when the shielded cable is inserted, the cable end is guided toward the wire introduction hole by a tapered hole provided in the braid compression device. 3. The method according to claim 1, wherein an electric wire stopper is provided for abutting the cable end, and the position of the electric wire stopper is changed to adjust the amount of compression and contraction of the braided shield. .