JPH0715848A - Switchboard - Google Patents

Abstract

PURPOSE:To improve efficiency in connection work for connecting a breaker to a bus duct. CONSTITUTION:A breaker and a bus conductor 13 are provided in a frame box, and the bus conductor 13 has a connection conductor 16 mounted with a bolt 15a and a nut 15b. A power line 18a of the breaker is put in a gap between a bus conductor 13 and a connection conductor 16, and the nut 15b is turned to join the bus conductor 13 together with the connection conductor 16 closely so that the power line 18a is connected to the bus conductor 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard having an improved connection form to a bus conductor of a main circuit device.

[0002]

2. Description of the Related Art A conventional structure of a switchboard will be described with reference to FIGS. The support plate 2 housed in the box 1 has 3
The busbar conductors 3 for phases are arranged, and power is supplied to each busbar conductor 3 via the horizontal conductor 3a. Then, four bolts 4a are inserted into each busbar conductor 3, and a nut 4b is screwed onto each bolt 4a.
Further, on the support plate 2, two circuit breakers 5 for wiring, which are main circuit devices, are arranged. In this case, crimp terminals 6, 6 are connected to the two power supply lines 5a, 5a for each phase of the circuit breaker 5, and the crimp terminals 6, 6 are connected between the bolts 4a, 4a and the bus bar conductor 3. The circuit breaker 5 is connected to the bus bar conductor 3 by sandwiching.

[0003]

However, since the crimp terminal 6 is used for each power supply line 5a in the above-mentioned conventional technique, it is necessary to crimp the crimp terminals 6 as many as the power supply lines 5a.
Moreover, each crimp terminal 6 is connected to the bolt 4a and the nut 4 respectively.
Since it is connected to the bus conductor 3 by b, the power supply line 5a
Therefore, the work of fastening the bolts 4a and the nuts 4b is required, and the workability of connecting the circuit breaker 5 to the busbar conductor 3 is poor. The present invention has been made in view of the above circumstances, and an object thereof is to provide a switchboard having good workability in connecting to a bus conductor of a main circuit device.

[0004]

According to a first aspect of the present invention, there is provided a switchboard which includes a busbar conductor arranged so that power is supplied to the box body, a main circuit device arranged in the box body, and a main circuit device. It is provided with a connecting body for sandwiching the power supply line of the circuit device between the bus bar conductor and a fastener for fastening the bus bar conductor and the connecting body. In this case, the busbar conductor or the connecting body may be provided with a hole into which the power supply line of the main circuit device is inserted (claim 2).

According to a third aspect of the present invention, in the switchboard, there are provided a main circuit device arranged in the box body and a hole arranged so as to supply power to the box body and into which a power line of the main circuit device is inserted. A busbar conductor having, a connection body having a hole that is arranged facing the busbar conductor and into which the power supply line of the main circuit device is inserted, and a fastener for fastening the busbar conductor and the connection body, and the busbar conductor is connected. It is characterized in that the holes of the busbar conductors and the holes of the connection body are displaced from each other in a state where they are fastened to the body.

[0006]

According to the above-mentioned means, the main circuit device is connected to the bus conductor in the following manner. First, according to the means described in claim 1, the power supply line of the main circuit device is sandwiched between the busbar conductor and the connecting body, and the busbar conductor and the connecting body are fastened by the fastener. Therefore, the work of connecting the power supply line to the bus bar conductor only needs to be performed once, and compared to the conventional configuration in which each power supply line is connected to the bus bar conductor by bolts and nuts via crimp terminals, Connection workability is improved.

According to the second aspect of the present invention, the power supply line of the main circuit device is inserted into the hole of the busbar conductor or the connecting body and is sandwiched between the busbar conductor and the connecting body. Therefore, the power supply line is bent in a state where the busbar conductor and the connection body are fastened, and the bent portion becomes a resistance in the pulling direction of the power supply line. As a result, it is possible to prevent the power line from coming off.

According to the third aspect of the present invention, the power supply line of the main circuit device is inserted into each hole of the busbar conductor and the connection body, and the busbar conductor and the connection body are fastened by the fastener. In this case, the holes of the busbar conductor and the holes of the connection body are misaligned, so that the power supply line is bent when the power supply line is inserted into both holes, and the power supply line can be prevented from falling off. it can.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. First, in FIG. 1 and FIG.
A support plate 12 is provided inside the box 11. The support plate 12 is provided with a plurality of vertically extending busbar conductors 13, for example, three phases, and a horizontal conductor 14 extending horizontally. The busbar conductor 13 and the horizontal conductor 14 are welded or the like. Are electrically connected by. And each horizontal conductor 1
4 is connected to a power source (not shown), and each busbar conductor 1
Power is supplied to 3 through the horizontal conductor 14. Each bus bar conductor 13 is formed with a plurality of, for example, three bolt insertion holes 13a.

A connecting body 16 is arranged opposite to each busbar conductor 13. In this case, each connector 16 is formed of a conductive metal plate and has three bolt insertion holes 16a corresponding to the bolt insertion holes 13a. Bolts 15a are inserted into the bolt insertion holes 16a of the connection body 16 and the bolt insertion holes 13a of the busbar conductor 13, and the connection body 16 is attached to the busbar conductor 13 by tightening the nuts 15b into the bolts 15a. It is supposed to be concluded. Therefore, the bolt 15a and the nut 15b function as a fastener.

The support plate 12 is provided with a plurality of, for example, two circuit breakers 18, which are main circuit devices for wiring. Each of the circuit breakers 18 has two power supply lines 18a, 18a having an insulation coating for each phase, and the power supply portion 18b of each power supply line 18a having the insulation coating removed is connected to the bus conductor 13. Each breaker 18 is connected to the busbar conductor 13 by being sandwiched in a gap 17 formed between the breaker 18 and the connection body 16. Further, the support plate 12 is provided with a terminal block 19 connected to an external load, and the load wire 18c of each circuit breaker 18 is provided.
Is connected to the terminal block 19.

Next, the procedure for connecting the circuit breaker 18 to the busbar conductor 13 will be described with reference to FIG. First,
The bolt 15a is inserted into the bolt insertion hole 13a of the busbar conductor 13 and the bolt insertion hole 16a of the connection body 16. Then, the nut 15b is screwed onto the bolt 15a, and the busbar conductor 13
Then, the connection body 16 is temporarily fixed. Next, in the gap 17 between the busbar conductor 13 and the connection body 16, the current-carrying portion 18b of the power supply line 18a is inserted.
Is inserted, each nut 15b is tightened, and the bus-bar conductor 13 and the connection body 16 are fastened.

Therefore, unlike the conventional structure in which a crimp terminal is crimped to each power supply line and the crimp terminal is connected to the busbar conductor by a bolt and a nut, respectively, the work of connecting the crimp terminal can be eliminated and the nut 15b can be eliminated. The number of fastening operations can be reduced, and the workability of connecting the circuit breaker 18 to the busbar conductor 13 can be improved.

FIG. 4 shows a second embodiment of the present invention. The difference from the first embodiment is that the power supply line 18a of the circuit breaker 18 has a hole 16b into which the energizing portion 18b is inserted. That is, it is formed on the connection body 16. In this case, the circuit breaker 18 is connected to the bus bar conductor 13 as follows. First, with the connection body 16 temporarily fixed to the busbar conductor 13, the energization portion 18b of the power supply line 18a is inserted into the hole 16b of the connection body 16 and sandwiched between the busbar conductor 13 and the connection body 16. Next, the busbar conductor 13 and the connection body 16 are fastened with the bolt 15a and the nut 15b.

Therefore, the current-carrying portion 18b of the power supply line 18a is bent in a substantially L-shape, and it becomes a resistance against the disconnection direction B of the power supply line 18a. As a result, it is possible to prevent the power supply line 18a from coming off from the gap 17. In addition, the second
Although the hole 16b is formed in the connection body 16 in the embodiment, the hole may be formed in the busbar conductor 13.

FIGS. 5 and 6 show a third embodiment of the present invention. The difference from the second embodiment is that the holes 13b into which the conducting portions 18b of the power supply lines 18a are inserted are bus bars. It is also formed on the body 13. Moreover, as shown in FIG. 6, the holes 13b of the busbar conductor 13 are arranged so that the holes 13b of the busbar conductor 13 and the holes 16b of the connection body 16 are displaced in the state where the busbar conductor 13 and the connection body 16 are fastened. Has been formed.

In this case, the circuit breaker 18 is connected to the bus bar conductor 13 as follows. First, as shown in FIG. 5, the hole 13b of the busbar conductor 13 and the hole 16b of the connection conductor 16 are formed.
In a state where and are aligned, the energization portion 18b of the power supply line 18a is inserted into both holes 13b and 16b. Next, the connection body 16
While moving upward, shift both holes 13b and 16b,
The screw insertion hole 13a of the busbar conductor 13 and the screw insertion hole 16a of the connection body 16 are aligned.

In this state, the current-carrying portion 18b is bent and becomes a resistance against the power line 18a in the pulling direction B. Therefore, even if the power supply line 18a is not gripped with fingers, the power supply line 18a is unlikely to fall off. As a result, it becomes easy to perform a series of fastening operations of inserting the bolt 15a into the screw insertion holes 13a and 16a and tightening the nut 15b into the bolt 15a. Moreover, the busbar conductor 13 and the connection body 16
The energizing portion 18b is in the bent state even when the and are fastened. Therefore, as in the second embodiment, the power supply line 18
It is possible to prevent a from coming off from the gap 17.

In the above first to third embodiments,
When changing the rated currents of the busbar conductor 13 and the connection body 16, it is possible to easily cope with the changes by simply increasing or decreasing the plate thicknesses of the busbar conductor 13 and the connection body 16. Also, the first
In the third embodiment, the metal plate is used as the connecting body 16, but a resin plate may be used, and the circuit breaker 18 for wiring is used as the main circuit device, but an earth leakage circuit breaker or the like may be used. .

[0020]

As is apparent from the above description, the switchboard of the present invention has the following excellent effects. According to the first aspect of the invention, since the power supply line of the main circuit device is sandwiched between the bus bar conductor and the connection conductor, the work of connecting the power supply line to the bus bar conductor is performed only once, The workability of connecting the crimp terminal to the bus conductor of the main circuit device is improved as compared with the conventional configuration in which the crimp terminal is connected to the bus conductor with bolts and nuts.

According to the second aspect of the invention, the power supply line inserted into the hole of the busbar conductor or the connection conductor is sandwiched between the busbar conductor and the connection body. Therefore, the power supply line is bent in a state in which the busbar conductor and the connection body are fastened, and the bent portion becomes a resistance in the pulling direction of the power supply line. As a result, it is possible to prevent the power line from coming off.

According to the third aspect of the present invention, the power source wire inserted into each hole of the busbar conductor and the connecting body is placed between the busbar conductor and the connecting body so that the holes are in a displaced state. I tried to pinch it. For this reason, when the busbar conductor and the connection body are fastened, the power supply line is bent, and the bent portion becomes a resistance against the direction in which the power supply line is pulled out. Both make it difficult for the power line to drop off.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of the present invention.

[Fig. 2] Rear view in vertical section

FIG. 3A is an enlarged side view showing a connection portion between a power supply line and a bus bar conductor, and FIG. 3B is a vertical cross-sectional rear view showing an enlarged connection portion between a power supply line and a bus bar conductor.

FIG. 4 is a view corresponding to FIG. 3B showing a second embodiment of the present invention.

FIG. 5 is a vertical cross-sectional rear view for explaining the operation of the third embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG.

FIG. 7 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 8 is a view corresponding to FIG.

[Explanation of symbols]

11 is a box, 13 is a busbar conductor, 13b is a hole, 15a is a bolt (fastener), 15b is a nut (fastener), 16 is a connection body, 16b is a hole, 18 is a circuit breaker (main circuit device), 18
“A” indicates a power line.

Claims (3)

[Claims] 1. A busbar conductor arranged to supply power to a box body, a main circuit device arranged in the box body, and a power supply line of the main circuit device between the busbar conductor. A switchboard comprising a connector sandwiched between and a fastener for fastening the busbar conductor and the connector. 2. The switchboard according to claim 1, wherein the busbar conductor or the connection body is formed with a hole into which the power supply line of the main circuit device is inserted. 3. A main circuit device arranged in a box body, a bus bar conductor having a hole which is arranged so that power is supplied to the box body and into which a power supply line of the main circuit device is inserted, A connecting body having a hole which is arranged facing the bus bar conductor and into which the power supply line of the main circuit device is inserted; and a fastener for fastening the bus bar conductor and the connecting body, and the hole of the bus bar conductor and the hole of the connecting body. The switchboard is characterized in that the busbar conductor and the connecting body are displaced in a state of being fastened.