JPH0321166Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cable branch connection body for easily and quickly branching off from the main line of power distribution wires and cables.

[Prior art] When branching from a trunk line such as an overhead power line or underground cable for power distribution to a consumer, etc., there is a method of cutting the wire/cable at the branch point, inserting a branch connection body and pulling it out, or Another method is to connect a branch cable directly to the cable conductor and then cover the connected portion with an insulating tape or an insulating cover.

[Problems to be solved by the invention] However, the above-mentioned branching work is usually carried out at high places such as on pillars, or in narrow places where it is difficult to work, such as public ditches or pipelines. In any of these methods, the direction of the wires or cables to be branched is limited to a specific direction depending on the direction of the main conductor, so it is difficult to pull out the wires or cables to be branched in a direction other than the specified direction. In this case, it is necessary to apply excessive force to the branch cable connection part or the electric wire or cable to be branched. In addition, all of the conventional methods require cutting of the main conductor, the insulation process is complicated, and it is impossible to perform branching in a short period of time, so the power transmission of the main conductor has to be stopped for a long time. Therefore, there has been a strong demand for a cable branch connector that can easily branch and connect cables even under such unfavorable working conditions.

[Means for solving the problems] The present invention has been made in view of the above points.
To provide a new cable branch connection body that enables branch connection work of electric wires, cables, especially power distribution cables, to be processed in a short time, and allows the direction of pulling out branch cables with respect to a main conductor to be freely adjusted. That is, the cable branch connection body according to the present invention has a cross section U for embracing and connecting to the main conductor provided above.
A connection body that is integrally formed with a conductor connection part in the shape of a groove and a branch body connection part provided at the bottom thereof for male-female coupling with a branch body, which will be described later, and a connection body having the branch body connection part at one end thereof. a branch body having a connection body connection portion for insertion into the branch cable, and a branch body having a cable connection portion for attaching the branch cable at the other end;
an insulator that covers the male and female connection parts between the connection body and the branch body as well as main parts of the branch body; and an insulator that communicates with the insulator near the lower end of the conductor connection part and is formed horizontally on both sides A heat-shrinkable insulator, a non-heat-shrinkable tip insert provided at one end of the heat-shrinkable insulator, and a non-heat-shrinkable tip receptacle provided at the other end of the heat-shrinkable insulator as main parts. It is characterized by comprising: In the cable branch connection body having the above configuration, the branch body is rotatable at the male and female connection portions between the branch body connection portion of the connection body and the connection body connection portion of the branch body, and is held in the direction of the main conductor. The main feature is that it has a structure that allows branch cables to be drawn out easily and without requiring a large space.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a sectional view of a cable branch connection body based on the present invention, and FIG. 2 is a sectional view showing the state after the cable branch connection body of FIG. 1 is attached to a main conductor. The cable branch connection body of this embodiment includes a connection body 1 consisting of a conductor connection portion 11 and a branch body connection portion 12 having a substantially U-shaped cross section, a connection body connection portion 21 at one end, and a branch cable at the other end. has a connecting portion 22, and the cable connecting portion 2
A rotatable branch main body 2 having a bent portion near the main body 2, and the U-shaped conductor connecting portion 11.
A series of insulators 4, 5, 6 having a T-shaped cross section are formed in the vertical and horizontal directions with the lower surface as the base end, and fitting holes are formed at the tips of the insulators 5, 6. Its main parts are composed of a tip receiving body 7 and a tip inserting body 8.

Next, each part of the above structure will be explained in more detail. It consists of a connecting body 1, copper, aluminum, etc.
The upper conductor connection part 11 is flexible and has a U-shaped vertical cross section so that it can easily hold the main conductor 20.
It is formed in the shape of a letter-shaped groove. Further, a contact 3 made of, for example, a spring is provided on the inner surface of the lower branch body connecting portion 12 to ensure electrical contact with the branch body 2. The branch main body connection part 12 is connected to the connection main body connection part 21 on the upper part of the branch main body 2.
Together with this, a fitting part 50 is formed, and a pull-out preventing part 9 is formed in the fitting part 50 to prevent the branch main body 2 from being pulled out during transportation or assembly work. In this embodiment, the pull-out prevention part 9
is formed by providing a hole in the bottom of the conductor connecting portion 11, inserting the tip of the connecting body connecting portion 21 into the hole, and then crushing the upper portion thereof.
Note that the electrical contact of the fitting portion 50, that is, the connection body 1
In order to make electrical contact with the branch main body 2, it is not necessarily necessary to provide the contactor 3 as in this embodiment, and if the direction in which the branch cable is drawn out is determined in advance, For example, the inside of the fitting part 50 may be processed into a tapered shape and then fixed by bolting from the bottom of the conductor connection part 11 after fitting, or the fitting part 50 may not be provided with a pull-out prevention part. Alternatively, it may have a structure in which it is left in a straight shape and is crimped and compressed from the outer periphery. The branch body 2 is also made of a material such as copper aluminum, and has a bent portion at a predetermined angle near the cable connection portion 22 provided at the tip opposite to the connection body connection portion 21. . Therefore, in the cable branch connection body of this embodiment, the branch cable 30 can be pulled out in any direction without being tied to the direction of the main conductor 20. In addition, since the branch cable 30 exists on the extension line of the bending part, it is possible to prevent unreasonable stress from acting on both the cable connection part 20 and the branch cable 30.

In this embodiment, a hole for inserting the branch cable 30 is provided in the cable connection part 22 in the longitudinal direction.
After the cable is inserted into this hole, it is fixed by crimping or the like. However, the cable connection part does not necessarily have to be formed in this way, and any shape and method may be used as long as it can ensure electrical contact with the branch cable. For example, the tip of the branch body 2 is made into a flat plate and a branch cable with a terminal is attached thereto by bolting, or the tip of the branch body 2 is provided with a hole and the inner surface has a spring shape similar to the above-mentioned fitting part 50. If a contactor is provided and the branch cable 30 is inserted, even if an accident occurs on the branch cable 30 side, it is possible to prevent the power transmission from being stopped for a long time on the main conductor, which can be easily disconnected and repaired. Note that the connection structure between the connecting body 1 and the branch body 2 is not limited to the method of fitting the respective ends together as in this embodiment; The configuration may be arbitrary as long as it can be connected.

Next, at the upper end of the insulator 4 covering the branch main body connection part 12 and the vertical part of the branch main body 2, in other words, at the lower end of the conductor connection part 11, a flexible The proximal ends of the band-shaped heat-shrinkable insulators 5 and 6 are located, and a non-heat-shrinkable tip receiving body 7 and a tip inserting body 8 are provided at the respective distal ends. Next, the method for forming the insulators 4, 5, and 6 will be described.
After integrally molding the insulators 5 and 6 and imparting heat shrinkability to the insulators 5 and 6, the insulators 5 and 6 are inserted into the fitting portion 50 and the branch body 2 to be integrated.
The fitting portion 50 and the branch main body 2 are formed by a method such as integrally molding only the parts, imparting heat shrinkability to all of them, and then heat shrinking the fitting part 50 and the branch body 2. In any case, the insulators 4, 5, and 6 have T in cross-sectional shape.
Since it is integrally molded to have a letter-shaped shape, it has excellent electrical insulation and waterproof properties, but in addition, a waterproofing mixture is applied to the side of the insulator that comes into contact with the connection body 1 or the branch body 2, etc. By doing so, the waterproof effect of the cable branch connection body can be further improved. Further, if a lubricant layer such as silicone or polytetrafluoroethylene (Teflon) is provided at the interface between the insulator 4, the fitting portion 50, and the branch body 2, the insulator can be easily inserted.

Next, a case will be described in which the cable branch connection body of this embodiment having the above-mentioned configuration is attached to a main conductor to perform branching. First, the main conductor 20 with the conductor portion exposed by peeling off the insulator is inserted into the U-shaped groove-shaped conductor connection portion 11, and is integrated by applying pressure with a compressor or the like. After that, the conductor connection part 1
1 is wrapped with insulators 5 and 6, and the tip receiving body 7 and the tip inserting body 8 are fitted together, and then the insulators 5 and 6 are contracted by heating to tightly integrate them (see Fig. 2). At this time, it is preferable to interpose a waterproofing compound at the interface between the insulators 5 and 6 and the conductor connection portion 11 to achieve complete waterproofing. On the other hand, when installing a branch cable, first rotate the branch main body 2 in the desired pulling direction, then connect the branch cable 30 to the cable connection part 22, and then heat-fuse it by wrapping an insulating tape on the connection part. The insulating waterproof layer 40 can be formed by forming a layer or molding it in advance and inserting it into the branch cable 30 and covering it with an insulating tube.
form. In order to shorten the time when power transmission to the main conductor is stopped, it is best to install branch cables in advance. Also, for the same purpose, the conductor connection part 1
It is also possible to adopt a method in which a blade-shaped contact is attached to the inner surface of the main conductor and the blade-shaped contact is inserted into the conductor portion of the main conductor from above the insulating layer.

Although the branch main body 2 in this embodiment is formed in an L-shape with a bent part near the cable connection part 22, it is necessary to provide such a bent part in the branch main body 2. Rather, as shown in Fig. 3, it remains straight, and has a connection body connection part 21 at the top and a cable connection part 22 at the bottom for inserting and connecting the branch cable 30 in a direction perpendicular to this. It may be formed as follows.

Further, the cable branch connection body of this embodiment uses a cable in which the branch body 2, the connection body 1, and the insulators 4, 5, and 6 are already integrated before the branch processing work, but for example, the insulator 4, It is also possible to insert only the branch cables 5 and 6 in advance into the branch cable, and after the connection process, move them to the branch main body 2 to cover the connecting parts and the like.

[Effects of the invention] As described above, the cable branch connection body of the present invention includes a connection body for connecting to the main conductor, and a connection body connection part for connecting to the connection body at one end,
Since the branch main body has a cable connection part at the other end for connecting the branch cable in a direction perpendicular to the connection part of the connection main body, the branch cable can be pulled out in any direction. The connection body has a connection part with the main conductor that is U-shaped in cross section, so there is no need to cut the main conductor when branching, and heat-shrinkable material is used for the insulator covering the connection part with the main conductor. This makes insulation processing extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a cable branch connection body showing one embodiment of the present invention, Fig. 2 is a sectional view showing the cable branch connection body of Fig. 1 attached to a main conductor, and Fig. 3 is a sectional view of the cable branch connection body shown in Fig. It is a figure which shows the other example of the branch main body used for the cable branch connection body of this invention. 1: connection body, 2: branch body, 3: contactor,
4, 5, 6: Insulator, 7: Tip receiver, 8: Tip inserter, 9: Pull-out prevention part, 11: Conductor connection part,
12: Branch main body connection part, 20: Main conductor, 21:
Connection main body connection part, 22: Cable connection part, 30:
Branch cable, 40: insulation prevention layer, 50: fitting part.

Claims (1)

[Claims for Utility Model Registration] (1) A connection consisting of a groove-shaped conductor connection part for enclosing the main conductor and further compression-connecting it, and a branch body connection part for connecting to the branch body described below. a main body, a branch main body having a connection main body connection part for connecting to the connection main body at one end and a cable connection part for connecting a branch cable in a direction perpendicular to the connection main body connection part at the other end; The connection body and the branch body are covered with an insulator made of a heat-shrinkable material, and at least the part that covers the connection body is made of an insulator, and the connection body and the branch body are connected in a male-female manner. A cable branch connection body characterized by: (2) The cable branch connection body according to claim 1 of the utility model registration, wherein a bent part is provided in the vicinity of the cable connection part of the branch body. (3) The cable branch connection body according to claim 1, wherein a waterproof mixture is interposed at the interface between the connection body, the branch body, and the insulator.