JPH0514663Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a ground-mounted low-voltage distribution branch box that houses multiple sets of branch bushings that branch from one low-voltage trunk cable to multiple low-voltage branch cables. It is something.

(Prior Art) FIG. 4 is an explanatory diagram of an example of a conventional ground-mounted low-voltage distribution branch box, in which A is a front view of the outer box of the main body, and B is a side view of the inside of the outer box.

The main body outer box 50 has a door type that can be opened and closed, and inside thereof there is a rubber-molded bushing 51 made of ethylene propylene rubber or the like, a compression sleeve whose one end is compressed and connected to the cable C1 in advance, and the other end of which the bushing 51 is attached. A plurality of sets of branch bushings are mounted comprising load break elbows 52 with male terminals connected to female terminals. In addition, in the drawing, 53 is the cable C1
This is a waterproof tape wrapping layer that protects the connection between the load break elbow 52 and the compression sleeve.

(Problem to be Solved) In the above-mentioned conventional above-ground low-voltage distribution branch box, water may enter the main body outer box from underground during rising water levels, and such water ingress may cause an electrical accident.

(Means for solving the problem) The present invention provides a low-voltage distribution branch box that solves the above-mentioned problems.The feature is that a bus bar with mold insulation is used as the connection conductor, and the mold insulation is made of copper. The front part of the bus bar connected to the tube terminal is missing, exposing the copper surface, and multiple cable insertion holes are provided at the bottom.The main line can be inserted through the cable insertion holes provided at the bottom of the molded insulation. A cable and a plurality of branch cables are each inserted and connected to the busbar at the part where the mold insulation is missing through copper tube terminals fixed to each end, and an insulating cover is provided between the outer periphery of the cable and the mold insulation. A plurality of sets of branch bushings connected in a watertight manner are installed in an airtight structure outer box body installed on a pedestal by waterproofing the missing part of the molded insulation at the connection part of the copper tube terminal with a lid. There is a particular thing.

FIG. 1 is a front view (A) and a side view (B) of the inside of a specific example of the low voltage distribution branch box of the present invention. Also, Fig. 2 is a partial perspective view of the branch bushing, Fig. 3 A is a vertical sectional view of the branch bushing in Fig. 2, and Fig.
-X arrow sectional view.

The outer box body 1 has a sealed structure and is installed on a pedestal 2, and a plurality of branch bushings 10 are attached to the inside thereof via attachment fittings 3.

The details of the branch bushing 10 are shown in FIGS. 2 and 3, and the branch bushing 10 includes a busbar 11 having a molded insulation 12 of rubber or plastic as a connecting conductor.
is used. The molded insulation 12 is missing the part where the bus bar 11 is connected to the copper tube terminal 15, exposing the copper surface, and the lower part has a plurality of cables inserted into which the main cable C1 and the plurality of branch cables C2 are inserted. A hole 14 is provided.

The sleeve portion of the copper tube terminal 15 is connected to the conductor exposed by stripping off the end insulation coating of the main cable C1 and the branch cable C2 by soldering, compression, crimping, etc. Bus bar 11 inserted into molded insulation 12 and with terminal portions of copper tube terminals 15 exposed.
It is attached to the surface with bolts 16. At this time, the mold insulation 12 is missing 1 in that part.
3, the copper tube terminal 15 can be easily attached and connected to the bus bar 11 with the bolt 16 from this portion 13 using a tool such as a wrench.
After the bus bar 11 and the copper tube terminal 15 are connected, the cutout 13 is covered with a lid 20 to form a watertight structure.

In addition, an insulating cover 17 is provided between the outer periphery of the cables C1 and C2 and the cable insertion hole 14 at the bottom of the molded insulation 12 to protect the connection between the cable end and the copper tube terminal 15. A tightening band 19 is used on the mold insulation 12 side, and the cable C1 and C2 sides are waterproof protected by tape wrapping 18.

(Functions and Effects) As explained above, the low voltage distribution branch box of the present invention provides the following effects.

Since busbars are used as branch conductors,
Multi-branching can be easily realized.

Since the outer box body has a sealed structure, it is possible to prevent water from entering the inside of the box.

The bus bar is molded insulated, and the connection between the bus bar and the copper tube terminal is inside the molded insulation. Moreover, the connection is kept waterproof by a lid, and the molded insulation and cable are kept waterproof by an insulating cover. Therefore, even if water gets into the main body of the outer box, the branch bushings maintain their waterproofing, so no accidents will occur.

Since the molded insulation lacks the front surface of the bus bar that is connected to the copper tube terminal, and the copper surface is exposed, it is easy to attach the copper tube terminal to the bus bar.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of a specific example of a low-voltage distribution branch box according to the present invention, in which A is a front view of the inside of the box and B is a side view. 2 is a partial perspective view of the branch bushing, FIG. 3A is a vertical sectional view of FIG. 2, and FIG. FIG. 4 is an explanatory diagram of an example of a conventional low-voltage distribution branch box, in which A is a front view of the outer box of the main body, and B is a side view of the inside of the box shown in FIG. 1... Outer box body, 2... Pedestal, 3... Mounting metal fittings, 10... Branch bushing, 11... Bus bar, 12... Mold insulation, 13... Missing part, 1
4...Cable insertion hole, 15...Copper tube terminal, 16
... Bolt, 17 ... Insulating cover, 18 ... Waterproof tape wrapping layer, 19 ... Tightening band, 20 ...
lid.

Claims (1)

[Scope of utility model registration request] A busbar with molded insulation is used as a connection conductor, and the molded insulation has a missing front part of the busbar that is connected to the copper tube terminal, exposing the copper surface, and multiple cable insertion holes at the bottom. A main cable and a plurality of branch cables are inserted through the cable insertion holes provided at the bottom of the molded insulation, and are connected to the portion where the molded insulation is missing through the copper tube terminals fixed to their respective ends. A plurality of sets of branch bushings are connected to the busbar, and the cable outer periphery and the mold insulation are watertightly connected by an insulating cover, and the missing part of the mold insulation at the connection part of the copper tube terminal is waterproofed by a cover, A low-voltage distribution branch box characterized by being installed inside a sealed outer box body installed on a pedestal.