JP2618600B2 - Cable branch sleeve - 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 branch sleeve used for branching in the middle of a power cable.

[0002]

2. Description of the Related Art FIGS. 9 to 13A and 13B show a structure of a cable branch sleeve 1 used in a plug-in branch connection portion of a conventional high-voltage power cable.

The cable branch sleeve 1 has a compression-type branch sleeve body 2 made of CuC. The compression-type branch sleeve body 2 is composed of a large-diameter main body 2a and a small-diameter compression section 2b integrally connected to both ends thereof. On the upper surface of the large-diameter main body portion 2a, a branch connection screw hole 3 as a branch connection portion is formed in a direction perpendicular to the branch connection portion. Slits 4 are provided on the upper surface of the boundary between the large-diameter main body portion 2a and each small-diameter compression portion 2b in order to avoid the influence of the large-diameter main body portion 2a and facilitate the compression of each small-diameter compression portion 2b. I have.

On the lower surface of the compression-type branch sleeve body 2, a cable conductor fitting groove 5 for fitting to a cable conductor of a power cable described later is provided along the longitudinal direction. The bottom 5a of the cable conductor fitting groove 5 is formed in an arc shape according to the conductor size of the power cable. In each small-diameter compression section 2b, the cable conductor fitting groove 5
The locking grooves 6 are provided by recessing portions of both side walls along the longitudinal direction.

The cable branch sleeve 1 has two sleeve collars 7 made of CuC for closing the cable conductor fitting groove 5 of the compression type branch sleeve body 2 at the position of each small-diameter compressed portion 2b. On both side surfaces of the upper portion of the sleeve collar 7, locking projections 8 to be fitted into the respective locking grooves 6 of the compression type branch sleeve main body 2 are protruded along the longitudinal direction. An arc groove 9 is provided on the upper surface of the sleeve collar 7 along the longitudinal direction in accordance with the conductor size of the power cable.

Next, such a cable branch sleeve 1 will be described.
With reference to FIG. 14, a description will be given of a conventional method of attaching a cable to a cable conductor in the middle of a power cable.

As shown in the figure, the power cable 10 strips the sheath 11 over a predetermined length La on the way to expose the cable conductor 12. The length La was expressed as La> (length of compression-type branch sleeve body 2) + 2 × (length of sleeve collar 7).

Next, at the center of the exposed portion of the cable conductor 12 in the longitudinal direction, the compression type branch sleeve body 2 is fitted into the cable conductor 12 by using the cable conductor fitting groove 5. At this time, the cable conductor 12 comes into contact with the arc-shaped bottom portion 5a of the cable conductor fitting groove 5.

In this state, the compression-type branch sleeve body 2 is provided.
The locking protrusions 8 are fitted into the locking grooves 6 of the cable conductor fitting grooves 5 from both ends in the longitudinal direction, and the sleeve collars 7 are slid respectively.
When the ends of these sleeve collars 7 coincide with both ends of the compression-type branch sleeve body 2, the insertion is stopped.

Thereafter, the cable branch sleeve 1 is compressed by a compressor at each small-diameter compression portion 2b to be integrated with the cable conductor 12.

When the above operation is completed, the thread portion of the female connector for branch connection (not shown) is screwed into the screw hole 3 for branch connection of the compression type branch sleeve body 2 and attached. Although not shown, a male connector of a branch cable is plug-in connected to such a female connector for branch connection.

Although not shown, the exposed portion of the conductor of such a branch connection portion is covered with an insulator.

[0013]

In the conventional cable branch sleeve 1 having the structure shown in FIGS. 9 to 13, the attachment of the sleeve collar 7 to the compression-type branch sleeve body 2 is performed in the longitudinal direction of the compression-type branch sleeve body 2. Since the exposed length La of the cable conductor 12 must be expressed as La> (the length of the compression-type branch sleeve body 2) + 2 × (the length of the sleeve collar 7) in the relationship performed on both sides, the length of the cable conductor 12 is The exposed length La has to be increased, which causes problems such as poor work efficiency and an increase in the entire length of the branch portion.

An object of the present invention is to provide a cable branch sleeve which allows a sleeve collar to be attached to a compression-type branch sleeve body even if the exposed length of a cable conductor is shorter than before.

[0015]

The structure of the present invention that achieves the above object will be described as follows.

According to the present invention, there is provided a compression-type branch sleeve body in which a cable conductor fitting groove to be fitted into a cable conductor of an electric power cable is opened along a longitudinal direction, and The two side walls of the cable conductor fitting groove are depressed to fit the respective locking ridges into the locking grooves formed in the longitudinal direction, respectively, and the cable conductor fitting groove is closed on both sides in the longitudinal direction. A cable branch sleeve having a structure including a sleeve collar is to be improved.

In the present invention, the compression type branch sleeve main body is positioned substantially at the center in the longitudinal direction of the cable conductor fitting groove, and the sleeve collar is oriented in a direction perpendicular to the longitudinal direction of the compression type branch sleeve main body. And a sleeve collar insertion opening large enough to be inserted into the compression type branch sleeve body.

In this case, the compression-type branch sleeve body includes a large-diameter main body portion and small-diameter compression portions integrally connected to both ends thereof, and the compression-type branch sleeve main body is continuously connected to the large-diameter main body portion and the small-diameter compression portion. A cable conductor fitting groove is provided along the direction, a branch connection portion is provided in the large-diameter main body portion on the side opposite to the opening side of the cable conductor fitting groove, and at the location of each of the small-diameter compression portions, It is preferable that a part of both side walls of the cable conductor fitting groove at that position is depressed along the longitudinal direction, so that a locking groove is provided. In addition, the cable conductor fitting groove is expanded in the width direction and the length direction in the large-diameter main body, and the sleeve collar is moved from the direction perpendicular to the longitudinal direction of the compression-type branch sleeve body. Preferably, a sleeve collar insertion opening large enough to be inserted into the main body is provided.

When the compression-type branch sleeve body is constituted by the large-diameter main body portion and the small-diameter compression portions integrally connected to both ends of the main body, the large-diameter main body portion having the branch connection screw hole is compressed. Instead, it can be attached to the cable conductor by compression of the small-diameter compression portions at both ends.

It is preferable that the upper surface of the boundary between the large-diameter main body portion and each of the small-diameter compression portions is provided with a slit.

In this way, the compression of each small-diameter compression section can be easily performed while avoiding the influence from the large-diameter main body.

[0022]

According to the present invention, the compression type branch sleeve body is
A sleeve collar insertion opening sized to be positioned substantially at the center of the cable conductor fitting groove in the longitudinal direction and capable of inserting the sleeve collar into the compression type branch sleeve body from a direction perpendicular to the longitudinal direction of the compression type branch sleeve body. Is provided, each sleeve collar can be inserted into the compression-type branch sleeve body from the longitudinal center of the compression-type branch sleeve body and slid to the left and right predetermined positions.

For this reason, the exposed length of the cable conductor may be a length that can attach the compression-type branch sleeve main body.
The exposed length of the cable conductor can be made shorter than before. Along with this, the entire length of the branch part can be made shorter than before.

[0024]

1 to 7A and 7B show a structure of an embodiment of a cable branch sleeve 1 according to the present invention used for a plug-in branch connection portion of a high-voltage power cable, for example. .

The cable branch sleeve 1 has a compression-type branch sleeve body 2 made of CuC or Cu. The compression-type branch sleeve body 2 is composed of a large-diameter main body 2a and a small-diameter compression section 2b integrally connected to both ends thereof. On the upper surface of the large-diameter main body portion 2a, a branch connection screw hole 3 as a branch connection portion is formed in a direction perpendicular to the branch connection portion. Slits 4 are provided on the upper surface of the boundary between the large-diameter main body portion 2a and each small-diameter compression portion 2b in order to avoid the influence of the large-diameter main body portion 2a and facilitate the compression of each small-diameter compression portion 2b. I have.

On the lower surface of the compression type branch sleeve main body 2, a cable conductor fitting groove 5 for fitting to a cable conductor of a power cable described later is provided along the longitudinal direction. The bottom 5a of the cable conductor fitting groove 5 is formed in an arc shape according to the conductor size of the power cable. In each small-diameter compression section 2b, the cable conductor fitting groove 5
The locking grooves 6 are provided by recessing portions of both side walls along the longitudinal direction. In the large-diameter main body 2a, the cable conductor fitting groove 5 at that location is expanded in the width direction and the length direction, and the sleeve collar 7 is connected to the compression type branch sleeve main body 2a.
A sleeve collar insertion opening 13 large enough to be inserted into the compression type branch sleeve main body 2 from a direction perpendicular to the longitudinal direction of the sleeve is provided.

The cable branch sleeve 1 has two sleeve collars 7 made of CuC, Cu, or the like for closing the cable conductor fitting groove 5 of the compression type branch sleeve main body 2 at the position of each small-diameter compressed portion 2b. On the upper surface of the sleeve collar 7, a locking ridge 8 to be fitted into each locking groove 6 of the compression type branch sleeve main body 2 is protruded along the longitudinal direction. On both side surfaces of the upper part of the sleeve collar 7, arc grooves 9 are provided along the longitudinal direction in accordance with the conductor size of the power cable.

In order to insert such a sleeve collar 7, the length of the sleeve collar insertion opening 13 is slightly larger than the length 7a of the sleeve collar 7, and its width is also larger than the width 7b of the sleeve collar 7. It is formed slightly larger.

Next, such a cable branch sleeve 1 will be described.
The method of attaching the cable to the cable conductor in the middle of the power cable will be described with reference to FIG.

As shown in the figure, the power cable 10 strips the sheath 11 over a predetermined length Lb on the way to expose the cable conductor 12. The length Lb is Lb ≧ (the length of the compression-type branch sleeve body 2). That is, in this case, the exposed length Lb of the cable conductor 12 is equal to the length of the compression-type branch sleeve body 2, or
Alternatively, the length is slightly longer. Therefore, La> Lb.

Next, the compression type branch sleeve body 2 is fitted to the exposed portion of the cable conductor 12 by using the cable conductor fitting groove 5. At this time, the cable conductor 12 comes into contact with the arc-shaped bottom portion 5a of the cable conductor fitting groove 5.

In this state, one sleeve collar 7 is inserted through the sleeve collar insertion opening 13 of the large-diameter main body portion 2a, and the locking ridge of the sleeve collar 7 is inserted into the locking groove 6 of one small-diameter compression portion 2b. 8, the sleeve collar 7 is slid to the small-diameter compression section 2b to position the sleeve collar 7 in a state where the end of the sleeve collar 7 coincides with the end of the small-diameter compression section 2b. Next, another sleeve collar 7 is inserted through the sleeve collar insertion opening 13 of the large-diameter main body 2a,
The sleeve collar 7 is inserted into the locking groove 6 of the other small-diameter compression portion 2b.
Then, the sleeve collar 7 is slid to the small-diameter compression section 2b to position the sleeve collar 7 in a state where the end of the sleeve collar 7 coincides with the end of the small-diameter compression section 2b.

Thereafter, the cable branch sleeve 1 is compressed by a compressor at each small-diameter compression section 2b to be integrated with the cable conductor 12.

When the above operation is completed, the thread portion of the female connector for branch connection (not shown) is screwed into the branch connection screw hole 3 of the compression type branch sleeve body 2 and attached. Although not shown, a male connector of a branch cable is plug-in connected to such a female connector for branch connection.

Although not shown, the exposed portions of the conductor of such a branch connection portion are covered with an insulator.

The sectional shape of the locking ridge 8 is not limited to a square as shown in the figure, but may be a triangle or the like. The cross-sectional shape of the locking groove 6 is also determined according to the shape of the locking ridge 8.

Further, instead of the screw hole 3 for branch connection, a branch connection portion made of a female or male conductor may be formed in the large-diameter main body portion 2a and formed integrally by protruding.

[0038]

According to the cable branch sleeve of the present invention as described above, the following excellent effects can be obtained.

In the present invention, the compression type branch sleeve body
A sleeve collar insertion opening sized to be positioned substantially at the center of the cable conductor fitting groove in the longitudinal direction so that the sleeve collar can be inserted into the compression type branch sleeve body from a direction perpendicular to the longitudinal direction of the compression type branch sleeve body. Since the sleeve collar is provided, each sleeve collar can be inserted into the compression-type branch sleeve body from the longitudinal center of the compression-type branch sleeve body and slid to the left and right predetermined positions.

For this reason, according to the present invention, the exposed length of the cable conductor may be any length as long as the compression type branch sleeve body can be attached, and the exposed length of the cable conductor can be made shorter than before. Along with this, the entire length of the branch part can be made shorter than before.

[Brief description of the drawings]

FIG. 1 is a plan view of one embodiment of a compression type branch sleeve main body used in a cable branch sleeve according to the present invention.

FIG. 2 is a front view of one embodiment of a compression-type branch sleeve main body used in the cable branch sleeve according to the present invention.

FIG. 3 is a bottom view of one embodiment of a compression-type branch sleeve main body used in the cable branch sleeve according to the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a sectional view taken along line CC of FIG. 2;

FIG. 7A is a front view of one embodiment of a sleeve collar used in the cable branch sleeve according to the present invention, and FIG.
3 is a right side view of FIG.

FIG. 8 is a side view showing a mounting process of one embodiment of the cable branch sleeve according to the present invention.

FIG. 9 is a plan view of one embodiment of a compression-type branch sleeve main body used in a conventional cable branch sleeve.

FIG. 10 is a front view of one embodiment of a compression-type branch sleeve main body used in a conventional cable branch sleeve.

FIG. 11 is a sectional view taken along line DD of FIG. 10;

FIG. 12 is a sectional view taken along line EE of FIG. 10;

13A is a front view of a sleeve collar used in a conventional cable branch sleeve, and FIG. 13B is a right side view of FIG.

FIG. 14 is a side view showing a mounting process of an embodiment of a conventional cable branch sleeve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable branch sleeve 2 Compression type branch sleeve main body 2a Large diameter main body part 2b Small diameter compression part 3 Branch connection screw hole (branch connection part) 4 Slit 5 Cable conductor fitting groove 5a Bottom part 6 Lock groove 7 Sleeve collar 8 Lock Projection 9 Arc groove 10 Power cable 11 Sheath 12 Cable conductor 13 Sleeve collar insertion opening

Claims (1)

(57) [Claims] 1. A compression type branch sleeve body in which a cable conductor fitting groove to be fitted in a cable conductor of an electric power cable is opened along a longitudinal direction, and said cable conductor of said compression type branch sleeve body. Two sleeve collars in which both side walls of the fitting groove are depressed and each locking ridge is fitted in a locking groove formed in the longitudinal direction to close the cable conductor fitting groove on both sides in the longitudinal direction. Wherein the compression-type branch sleeve body is located substantially at the center in the longitudinal direction of the cable conductor fitting groove, and the sleeve collar is orthogonal to the longitudinal direction of the compression-type branch sleeve body. A cable branch sleeve provided with a sleeve collar insertion opening large enough to be inserted into the compression-type branch sleeve body from a direction.