JP3280124B2 - Cable terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable terminal suitable for terminating an electric cable having a shielding layer, for example, a bypass cable.

[0002]

2. Description of the Related Art A cable for power transmission and distribution is provided with a shielding layer in terms of electrical characteristics or safety. FIG. 2 is a longitudinal sectional view of a terminal portion of a bypass cable used at the time of restoration of a distribution line accident. In the cable 1 shown in the figure, the sheath 2, the shielding layer 3, the semiconductive layer 4, and the insulator 5 are sequentially removed to expose the conductor 6. A connection terminal 7 is compression-connected to the conductor 6. Further, in order to protect a terminal portion of such a cable, a molded portion 8 made of insulating rubber or the like is provided. Inside the mold portion 8, a stress cone 9 is formed in a trumpet shape from the end of the semiconductive layer 4. The stress cone 9 is provided to regulate the electric field at the end of the semiconductive layer 4 and to electrically protect the terminal. In addition, the shielding layer 3 of the cable 1
In order to check whether or not the continuity is conducted in the longitudinal direction, the clamp plate 11 and the continuity checking electrode 12 as shown in FIG.
Are provided.

FIG. 3 is a perspective view of the clamp plate 11 and the continuity checking electrode 12 as described above. As shown in this figure, the clamp plate 11 is shaped to surround the semiconductive layer 4 of the cable 1 shown in FIG. 2, and the shielding layer 3 is connected by soldering as shown in FIG. The continuity check electrode 12 is formed of a ring-shaped metal fitting and is fixed to the clamp plate 11. The conduction checking electrode 12 is connected to a checking electrode or the like through an opening 13 provided on a side surface of the mold section 8 shown in FIG.

[0004]

However, the conventional cable terminal as described above has the following problems to be solved. 4 and 5 are perspective views of a main part of a conventional cable terminal. As shown in FIG. 4, the clamp plate 11 is mounted on the semiconductive layer 4 of the cable 1 in advance. However, when the clamp plate 11 is tilted as shown in FIG. 4 due to such mounting or for some reason after the mounting, the edge thereof strikes the semiconductive layer 4 and damages the semiconductive layer 4 or the insulator 5. Or

Further, as shown in FIG. 5A, if the edge portion of the clamp plate 11 is bent inward, an accident such as damaging the semiconductive layer 4 or penetrating the semiconductive layer 4 and biting into the insulator 5 may occur. There is. Therefore, it is necessary to carefully perform installation work and inspection, which hinders improvement in workability. Further, as shown in FIG.
1, the shielding layer 3 is connected by soldering. In this case, the heat of the solder may damage or deform the semiconductive layer 4 and the insulator 5. Therefore, there is a problem that the soldering operation also requires skill and careful consideration.

[0006] The present invention has been made in view of the above points, and when connecting the continuity check electrode to the shielding layer as described above, the cable is not damaged and the cable is damaged by heat. It is an object of the present invention to provide a cable terminal unit without fear.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a cable terminal.
A conductive frame disposed on a semiconductive layer of
Shield made of braided wire provided on the semiconductive layer
The crimp terminal to which the shielding layer is crimped and the frame
To check the continuity of the shielding layer.
Covers the cable ends, including poles and frame, and is conductive
A model with an opening that exposes the inspection electrode for inspection contact
And a field part.

[0008]

The cable end is connected to the continuity check electrode and the pressure
A frame provided with a receiving terminal is provided . Shielding layer is compressed connected to the crimp terminal. The frame from Rukoto are arranged in a semi-conductive layer of the cable mold, or damage the semiconductive layer, there is no danger or breaks through the semiconductive layer.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a cable terminal section of the present invention. In the figure, this cable 1 is a bypass cable used for bypass in an accident section of a distribution line, for example. The sheath 2 of the cable 1, the shielding layer 3, the semiconductive layer 4 and the insulator 5 are sequentially stripped. The configurations of the conductors and the connection terminals are the same as those of the prior art described with reference to FIG. A stress cone 9 is electrically connected to the semiconductive layer 4. This is exactly the same as the conventional one.

Here, in the cable terminal portion of the present invention, a metal frame 17 is provided on the crimp terminal 1 against the shielding layer 3.
5 are electrically connected. Also, this frame 1
A ring-shaped conduction checking electrode 12 is integrally fixed to 7. These are all made of copper, copper alloy, or the like.
The frame 17 is disposed so as to be in close contact with the side surface of the semiconductive layer 4 of the cable 1, and the molded portion 8 is formed so as to surround and protect the end of the cable and the frame 17 and the like. Have been. An opening 16 is provided in the mold section 8, and a rubber plug 18 is fitted into the opening 16 in the state shown in FIG. When the rubber stopper 18 is removed, the continuity check electrode 12
, A terminal of a measuring instrument or the like can be connected thereto.

FIG. 6 is a perspective view showing a modified example of the cable terminal portion according to the present invention. In this figure, the frame 21 is curved with respect to the semiconductive layer 4 of the cable 1 so as to follow the curved surface. The crimp terminal 22 is attached to this end, and the shielding layer 3 is connected by compression. The continuity check electrode 12 is a frame 21
It is fixed to the central part of. In the case of the above configuration, the shielding layer 3 of the cable 1 is electrically connected by compression connection in any of the example shown in FIG. 1 and the example shown in FIG. . Further, the size of the frame 21 is selected so as to be lightly adhered to the semiconductive layer 4 and does not need to be temporarily fixed for soldering and does not need to be large enough to surround the semiconductive layer 4. There is no risk of damaging the semiconductive layer 4 at the edge.

The present invention is not limited to the above embodiment. The shape of the crimp terminal shown in the above embodiment may be replaced by any of the conventionally well-known terminal structures capable of compression connection. Further, the continuity check electrode is not necessarily ring-shaped, and may be configured as a simple protrusion. Further, the crimp terminal and the continuity check electrode may be fixed anywhere on the frame.

[0013]

According to the above-described cable terminal portion of the present invention, a crimp terminal which is compression-connected to the cable shielding layer is provided on the frame together with the continuity check electrode of the shielding layer .
Therefore, soldering connection of the shielding layer becomes unnecessary, and thermal protection of the cable is achieved. In addition, the frame is integrally molded
Since the semiconductive layer is covered with the cable portion, there is no possibility of damaging or penetrating the semiconductive layer, and it is possible to provide a cable terminal portion excellent in electric characteristics.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a cable terminal according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a conventional cable terminal unit.

FIG. 3 is a perspective view showing a conventional conduction check electrode and a clamp plate.

FIG. 4 is a perspective view of a main part showing a problem of a conventional cable terminal.

FIG. 5 is a perspective view of a main part showing another problem of the conventional cable terminal.

FIG. 6 is a perspective view of a main part showing a modified example of the cable terminal part of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable 3 Shielding layer 4 Semi-conductive layer 5 Insulator 8 Mold part 12 Continuity check electrode 15 Crimp terminal 16 Opening 17 Frame 18 Rubber stopper

Continuation of the front page (56) References JP-A-4-281322 (JP, A) JP-A-6-351145 (JP, A) Japanese Utility Model Application Sho-59-119572 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) H02G 15/02 H01R 4/64 H02G 15/064

Claims (1)

(57) [Claims] 1. A crimp terminal to which a conductive frame provided on a semiconductive layer of a cable terminal and a shielding layer provided on the frame and comprising a braided wire located on the semiconductive layer are connected by crimping. And a continuity check electrode provided on the frame for detecting the presence / absence of continuity of the shielding layer; and covering the cable terminal including the frame, and exposing the continuity check electrode so as to allow check contact. A cable terminal portion, comprising: a mold portion having an opening.