JPH1051936A - Cable terminal portion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve waterproofing ability by providing a cylindrical skirt portion at the side of a conductor insertion hole of a cable terminal sleeve and by covering up to the terminal of an insulating body continuing from the conductor or up to an insulating tube terminal. SOLUTION: For forming a cable terminal portion, a conductor 7 is exposed after cutting the cable, an insulating body 8 is treated and then the conductor 7 and the insulating body 8 are covered with a cable terminal 4. If there is gap between the insulating body 8 and a skirt, then adhesive tape is wrapped round the insulating body 8. The cable terminal 4 is attached in such a manner that the bottom of the cylindrical skirt portion 3 covers the cable insulation body end portion as deep as possible, and the sleeve 2 is bonded together with the conductor 7 under pressure. Burrs from the bonding are removed and adhesive tape 9 is wound around from the bottom of the cylindrical skirt 3 to the cable insulating body 8, and the adhesive tape is wound around for waterproofing. Thereafter, an insulation tube 11 is covered, a rain cover 10 is attached and the assembly is completed. The adhesive tape 9 is of an double-sided type and can become also as a bonding layer with the insulation tube 11 by the shrinking force of the insulating tube 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal portion of a power cable or a distribution cable, and is mainly intended for outdoor use.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional cable terminal. In the conventional terminal part, the cable terminal 103 is composed of the blade part 101 and the sleeve 102. The sleeve is inserted on the exposed conductor 7, and the cable terminal is attached by crimping or compressing from the sleeve. (The sleeve of the cable terminal can be fixed to the conductor by crimping or compression, but is represented by crimping in this specification.) The conductor is stripped slightly longer than the cable terminal 103 in consideration of the elongation at the time of crimping. A part of the sleeve 102, the conductor 7, the insulator 8 and the step exist, and this part is covered by the insulating tape winding 104.

[0003] However, this tape winding layer has low reliability in terms of waterproofness for preventing rain from entering the inside. The cause is that the force applied to the cable from the jumper wire due to wind etc. is transmitted to the conductor via the cable terminal and the tape winding is also affected, and the tape and metal have different expansion and contraction rates, so the temperature change This is because peeling may occur over a long period of time. Should the tape interface break and the water reaches the conductor 7, if the conductor is a stranded wire, the water will run laterally and cause an electrical accident.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple and waterproof terminal. It is an object of the present invention to provide a terminal which is simple and has good waterproof properties and has a strong restraint between a cable terminal and a cable end.

[0005]

According to the first and second aspects of the present invention, there is provided a structure in which an upper cylindrical portion is provided on a conductor insertion hole side of a cable terminal sleeve to cover an insulator terminal or an insulating tube terminal following a conductor. did. As a result, the conductor is not exposed, and water droplets on the surface of the cable terminal flow to the end of the insulator or the end of the insulating tube, so that the waterproofness can be improved.

According to the third aspect of the present invention, the packing of the elastic body is provided inside the cylindrical skirt portion of the cable terminal, so that the packing is applied with a compressive force. The packing expands in the radial direction by receiving the compressive force, and comes into close contact with the inner wall of the skirt portion and the insulator or insulating tube layer inside the skirt portion, so that the waterproof from below the skirt portion and the cable terminal and the cable end can be fixed. Insert this cable terminal into the cable end where the cable conductor is exposed,
After crimping between the sleeve and the conductor, the packing in the tubular skirt was compressed to waterproofly fix the cable insulator or the insulating tube and the terminal skirt. If the packing is lightly tightened before the crimping and the core of the cable is put out and placed, the crimping can be easily performed.

[0007]

FIG. 1 is a front view of a terminal according to a first embodiment of the present invention. The terminal part is composed of a cable (conductor 7, insulator 8), accessories (insulating tube 11, rain cover 10, etc.) and a cable terminal 4. After processing the cable, crimp the cable terminal and insert the accessories to complete the assembly terminal. The cable terminal 4 is composed of a blade plate 1 having a mounting hole, a sleeve 2, and a skirt 3 having an inner diameter corresponding to the outer diameter of the cable insulator 8. The hakama portion 3 is formed by brazing after cutting, or by expanding the diameter of the sleeve 2.

In order to form a cable terminal portion, after cutting the cable, the conductor 7 is stripped, the insulator 8 is treated, and then the cable terminal 4 is put on the conductor 7 and the insulator 8. If there is a gap between the insulator and the hakama, wrap an adhesive tape (not shown) on the insulator. Attach the cable terminal 4 so that the end of the cable insulator covers the end of the cable insulator as deeply as possible.
Is crimped to the conductor 7. Adhesive tape 9 is wrapped from the bottom of the cylindrical skirt to the cable insulator to perform waterproof treatment. Then, the insulating tube 11 is covered, the rain cover 10 is attached, and the assembly is completed. The adhesive tape 9 is a double-sided type, and also serves as an adhesive layer with the insulating tube 11 by the contraction force of the insulating tube 11.

FIG. 2 is a front view of a terminal according to a second embodiment of the present invention. The difference from the first embodiment is that the cable terminal 4
Is covered on the outermost insulating tube 11. As a result, the cable terminal 4
, And the waterproof property further increases, but the cable terminal 4 becomes large and the terminal portion becomes slightly longer.

FIG. 3 is a front view showing the vicinity of a cable terminal of a terminal according to a third embodiment of the present invention. The difference from the first and second embodiments is that a packing 5 is provided inside the skirt 3 of the cable terminal 4. That is, a tapered portion is provided inside the hakama portion 3 and a packing 5 having an inner diameter substantially equal to the outer diameter of the insulating tube 11 is fitted inside the elastic tube made of rubber or the like and having the same taper on the outside. If the packing 5 is screwed into the skirt 3 after being inserted into the cable and tightened with the tightening ring 6, the packing 5 is compressed to close the gap between the insulating tube 11 and the inner wall of the skirt 3, thereby fulfilling the role of fixing and waterproofing.

In order to form the cable terminal, after the cable is cut, the conductor 7 is stripped, the terminal is treated, an insulating tube 11 is inserted, a rain cover 10 is attached, and finally, the cable terminal 4 is inserted into the cable conductor 7. At the same time, the cable insulator 8 and the insulating tube 11 are inserted into the cylindrical skirt, the packing 5 is compressed and fixed, the sleeve and the conductor are crimped and fixed, and the packing 5 is further tightened with the ring 6. Fix with. The inside is partitioned by packing 5, and the waterproofness is perfect. Further, the terminal portion can be firmly fixed at two places with the crimping portion and the packing 5.

In the embodiment shown in FIG. 3, the insulating tube 11 is mounted on the cable insulator 8, but the cable terminal 4 is inserted directly on the cable insulator 8 without mounting the insulating tube 11. You may make it.

[0013]

According to the present invention, by adopting the structure described in the first and second aspects, it is possible to obtain a simple and highly waterproof terminal part. According to the third aspect of the present invention, it is possible to obtain a cable terminal portion having good waterproofness and strong restraint between the cable terminal and the cable end.

[Brief description of the drawings]

FIG. 1 is a half sectional front view showing an embodiment of the present invention.

FIG. 2 is a half sectional front view showing another embodiment of the present invention.

FIG. 3 is a half sectional front view showing still another embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional cable terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Blade part 2 ... Sleeve 3 ... Hakama part 4 ... Cable terminal 5 ... Packing 6 ... Tightening ring 7 ... Conductor 8 ... Cable insulator 9 ... Adhesive tape 10 ... Rain cover 11 ... Insulating tube 101 ... Bain board 102 ... Sleeve 103 ... Cable terminal 104 ... Insulating tape

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiko Honda 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Inventor Shigeru Matsumoto 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (3)

[Claims] A cable terminal comprising a blade plate portion, a sleeve provided at a base portion of the blade plate portion, and a cylindrical skirt provided on a side of the sleeve where a conductor is inserted, is connected to a cable conductor terminal having a cable conductor exposed. At least the skirt of the cylindrical skirt is attached so as to cover the end of the cable insulator, the sleeve and the cable conductor are crimped to fix the cable terminal to the cable terminal, and from the skirt of the cylindrical skirt. A cable terminal part that is waterproofed with an insulating tape over a cable insulator. 2. A cable terminal process, and after covering an insulator at an end of the cable with an outermost insulating tube, a blade plate portion;
A cable terminal consisting of a sleeve provided at the base of this feather plate portion and a tubular skirt provided on the conductor insertion hole side of the sleeve is connected to a cable conductor end where a cable conductor is exposed. Attach so that the hem covers the end of the outermost insulating tube, crimp the sleeve and the cable conductor to fix the cable terminal to the cable end, and waterproof with insulating tape from the hem of the cylindrical skirt to the insulating tube. A cable terminal unit characterized by being processed. 3. The cable terminal is provided with a packing of an elastic body provided inside the cylindrical skirt portion of the cable terminal, a compressive force is applied to the packing, and the skirt portion and the inner layer are waterproof and fixed. The cable terminal unit according to claim 1 or 2, wherein