JPH06351145A - Terminal part of bypass cable - Google Patents

Abstract

PURPOSE:To provide a small-sized terminal part of a bypass cable whereby the laying of the bypass cable is facilitated. CONSTITUTION:To the end part of a cable conductor 22, a compression terminal 23 is fastened which has a strap part 24 forming a predetermined angle, e.g. 15 degrees with the center axis line of the cable, and the end part is molded with an insulation rubber in a body, and as a result, an insulation cover is formed. Thereby, the interposition of any dedicated adaptor is dispensed with, and the size of the whole of a terminal part 20 of a bypass cable can be reduced. Also, by virtue of the inclination of the strap part 24, the allowable bend radius of the bypass cable which is drawn out from an apparatus via its opening can be made large, and the laying of the bypass cable is facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bypass cable terminal, and more particularly to a bypass cable terminal for connecting to an underground power distribution device such as a multi-circuit switch.

[0002]

2. Description of the Related Art There are many types of underground power distribution equipment such as multi-circuit switches, ground transformers, cabinets, etc., and bypass cables connected to these equipment also have various types depending on the type of equipment. There is something. Such a bypass cable can be used without interruption when the equipment connected to the power distribution line fails or when the equipment is replaced regularly, without interrupting the power distribution line. Is used to form a bypass path. Figure 5
Is an underground distribution line to which the multi-circuit switch 1 and the cabinets 2 and 3 are connected. In this power distribution path, for example, the cabinet 3 marked with X has failed, and this cabinet 3
In order to replace the cable with the underground uninterruptible construction method, the bypass cables 5 and 6 are connected and used via the bypass switch 4 to form a bypass path from the cabinet 2. Bypass cables 5, 6 used for such bypass passages
FIG. 6 shows the structure of the terminating end portion in FIG.

In the figure, reference numeral 10 shows the entire bypass cable terminal portion. A cable core 11 is arranged at the center of the bypass cable terminal portion 10. A shield layer 12 is formed at the end of the cable core 11, and the insulator 7 and the conductor 8 are sequentially peeled off. Also, the entire edge is
Insulating cover 1 molded integrally with insulating rubber
3 is formed. A terminal 9 provided with a screw hole 9a is compression-connected to the tip of the conductor 8 exposed from the end of the bypass cable terminal portion 10. A terminal fixing tube 14 is attached to the outer circumference of the terminal 9. 1
Reference numeral 5 is a cone-shaped ground terminal that is electrically connected to the shield layer 12 disposed inside and is provided in the insulating cover 13 to ground the device.

When connecting the bypass cable terminating portion 10 having the above-described structure to, for example, a multi-circuit switch of an underground power distribution device, an adapter as shown in FIG. 7 is used. This adapter 16 includes a battledore part 17 and a mounting terminal part 1
8 and. An elastic ring 19 having a leaf spring-shaped ridge 19a formed on the inner peripheral surface is inserted and fixed in the mounting terminal portion 18. Therefore, when attaching the bypass cable terminating portion 10 to a multi-circuit switch, first, the attachment terminal portion 18 side of the adapter 16 is inserted into the terminal 9 of the bypass cable terminating portion 10 and the elastic ring 19 Plug in using the spring action. Next, the adapter 16 is connected to the device side using the through hole 17a on the battledore 17 side.

[0005]

By the way, most underground power distribution equipment does not have a dedicated connection portion for the bypass cable,
The existing cable connection must be used to connect the bypass cable end with the above structure. However, in such a case, since the dedicated adapter as a separate component is interposed, the length of the bypass cable end portion itself becomes longer, and the workability is extremely poor in a place where the space is narrow, and the cable is There was a problem to be solved that the allowable bending radius of was not sufficiently obtained and the cable could not be routed smoothly. The present invention has been made to solve the above problems, and can be connected with good workability even in a place with a small space for connection such as a multi-circuit switch, and the allowable bending of the cable. It is an object of the present invention to provide a bypass cable terminating portion which can have a sufficient radius and which can be easily routed.

[0006]

A bypass cable terminal portion of the present invention has a compression terminal having a battledore portion for mounting on a device side inclined at a predetermined angle, and the compression terminal is fixed to an end portion of a cable conductor. However, an insulating cover formed by integrally molding the entire end portion with rubber is provided.

[0007]

In the bypass cable terminating portion of the present invention, the compression terminal having the battledore portion inclined at a predetermined angle, for example, 15 ° with respect to the cable center axis is fixed to the end portion of the cable conductor, and the end portion is fixed. An insulating cover is formed by integrally molding with insulating rubber. This eliminates the need for a dedicated adapter, and makes it possible to reduce the size of the bypass cable termination portion as a whole. Also, by tilting the battledore part, it is possible to take a large allowable bending radius of the bypass cable drawn out from the device side through the opening,
In addition, the cable can be easily routed.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a bypass cable termination portion of the present invention. In the drawing, 20 indicates the entire bypass cable termination portion. This bypass cable terminal 20
Strips the jacket of the cable 21 to expose the cable conductor 22a in order, and the compression terminal 23 is crimped and fixed to the cable conductor 22. FIG. 2 shows a front view of only the compression terminal 23. The compression terminal 23 includes a battledore portion 24 and a terminal portion 25, and has a structure in which the terminal portion 25 is crimped and fixed to the cable conductor 22a as described above. On the other hand, the battledore part 24 is formed with a through hole 26 for attachment for connecting to an underground power distribution device such as a multi-circuit switch.

Here, what is particularly important is the battledore part 24.
However, as shown in FIG. 1, it is formed so as to be inclined by a predetermined angle α with respect to the central axis M of the terminal portion 25 or the cable 21, for example, α = 15 ° in this embodiment. By providing this slope, the bypass cable,
This has the advantage that the cable can be routed very easily when the cable is pulled out from an opening provided in the front surface of a device such as a multi-circuit switch. That is, conventionally, as shown in FIG. 8, the bypass cable terminal portion 10 drawn out from the opening 41 of the multi-circuit switch 40 is disposed substantially vertically downward with respect to the mounting battle plate 42 on the multi-circuit switch 40 side. Compression terminal 2 to extend
Since it is attached via 3, it is not possible to secure a sufficient radius of curvature R1 of the bypass cable end portion 10 that is bent.

On the other hand, in the present invention, as shown in FIG. 9, since the battledore portion 24 of the bypass cable terminal portion 20 is formed to be inclined, the bypass cable terminal portion 2 is formed.
0 as a whole is attached to the mounting circuit board 42 on the side of the multi-circuit switch 40.
On the other hand, it can be inclined and pulled out obliquely downward. Therefore, the opening 4 provided on the front surface of the multi-circuit switch 40
The radius of curvature R2 of the bypass cable terminating portion 20 that is pulled out from the cable 1 can be made large, and the cable can be easily routed to the left and right, and there is no risk of damaging the cable itself.

Next, the structure of the present invention will be described in more detail with reference to FIGS. 1 and 1A and 1B, which are cross-sectional views taken along the line AA. The compression terminal 2 of the bypass cable terminal 20
The outer circumference of the end portion of the cable 21 to which 3 is attached is integrally molded with an insulating material such as EP rubber to form an insulating cover 27. A semiconductive layer 28 made of an insulating material such as EP rubber is also formed in the insulating cover 27, and the shielded braided wire 29 inside the insulating cover 2 is covered with the insulating cover 2.
It is connected by soldering to the grounding metal fitting 30 buried in the inside 7. A cylindrical hole 31 is formed in a part of the insulating cover 27 so as to communicate with the grounding fitting 30, and the hole 31 is usually made of an insulating material such as EP rubber.
It is closed by a cap 32 having a shape as shown in FIG.

With the above structure, when the continuity check of the shield braid 29 is required for the periodic inspection or the like, the cap 32 is removed to make a predetermined connection with the shield braid 29, and the conductor check can be performed. It was done like this.
Thus, the bypass cable terminating portion 20 of the present invention is
In the equipment such as the multi-circuit switch 40, it is not necessary to provide the cone-shaped grounding terminal 15 inside the insulating cover 13 in order to prevent the cable from being grounded. This contributes to miniaturization.

[0013]

As described above, according to the present invention, the compression terminal having the battledore portion inclined by a predetermined angle is fixed to the end of the cable conductor, and the end is integrally molded with the insulating rubber. Since the insulating cover is formed by using the above, the following effects can be obtained. (1) Bypass cable for integral molding without installing a dedicated adapter and installing a compression terminal from the beginning to the cable end, and without providing a cone-shaped ground terminal inside the insulating cover, unlike the conventional case. It is possible to reduce the size of the entire terminal portion. (2) Since the battledore part of the compression terminal fixed to the end part of the bypass cable is inclined at a predetermined angle, it is fixed to the device side and bent when the device is pulled out from the opening of the device. Can be made sufficiently large, which facilitates cable routing and eliminates the possibility of damaging the cable itself. (3) It is not necessary to prepare a dedicated adapter as a separate component because it is a dedicated bypass cable termination part according to the type of underground power distribution equipment, so wiring work can be done efficiently and in a short time even in a narrow space. Can be carried out. (4) If you remove the cap provided at the cable end,
When the internal shielding layer is exposed and a periodic inspection or the like is performed, a conductor check or the like of the shielding layer can be easily performed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a bypass cable termination portion of the present invention.

FIG. 2 is a plan view of a compression terminal attached to the terminal end portion of the bypass cable.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a front view of a cap used for the terminal end portion of the bypass cable.

FIG. 5 is an explanatory diagram of a case where a bypass cable is formed in a power distribution path to form a bypass path.

FIG. 6 is a vertical cross-sectional view of a conventional bypass cable terminal portion.

FIG. 7 is a half cross-sectional view of a conventional adapter to be attached to a terminal end portion of a bypass cable.

FIG. 8 is an explanatory view showing a state in which a conventional bypass cable terminal portion is attached to a device side.

FIG. 9 is an explanatory view showing a mounting state of the bypass cable terminating portion of the present invention on the device side.

[Explanation of symbols]

 20 Bypass cable terminal part 21 Cable 22 Cable conductor 23 Compressed terminal 24 Battledore part 25 Terminal part 26 Through hole 27 Insulating cover 28 Semi-conductive layer 29 Shielding braid wire 30 Grounding metal fitting 31 Hole 32 Cap

Front page continuation (72) Inventor Yutaka Kobayashi 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Showa Electric Wire & Cable Co., Ltd. Within Kyoden Electric Co., Ltd. (72) Inventor Teruo Kobayashi 1-5-1 Kiba, Koto-ku, Tokyo Fujikura Ltd. (72) Inventor Ken Abeyama 1-5-1 Kiba, Koto-ku, Tokyo Shareholders Inside Fujikura

Claims (1)

[Claims] 1. A compression terminal having a battledore portion for mounting on a device side which is inclined at a predetermined angle, and this compression terminal is fixed to an end portion of a cable conductor, and the entire end portion is integrally molded with rubber. And an insulating cover formed by the bypass cable terminating portion.