JP4407189B2 - Distribution board - Google Patents

Description

  The present invention mainly relates to a distribution board used for, for example, a single-phase two-wire wiring path.

As a distribution board used for a single-phase two-wire wiring path, there is one shown in Patent Document 1. For example, as shown in FIGS. 4 and 5, a main breaker 60 'and branch breakers 60, 60,... That are attached to a DIN rail standardized by the DIN standard are arranged side by side. Yes , the main breaker 60 'is a two-pole type breaker that opens and closes both the power supply side line and the neutral side line of the single-phase two-wire wiring path. A type breaker.

  The main breaker 60 ′ and the branch breakers 60, 60,... Have a terminal device that connects the conductors by moving the terminal frame to the front side when the screw is tightened from the front side to the back side.

  In this distribution board, for example, the power source line 97 from the main breaker 60 ′ is connected to the main bar 98, the main bar 98 is connected to the power source terminal 67a of each branch breaker 60, and for example, the neutral from the main breaker 60 ′ is neutral. The side wire 96 is connected to the wire connection portion 71b of the terminal block 70, and the load side terminal 67b of the branch breaker 60 and the wire connection portion 71b are connected to the load.

Here, some of the branch breakers 60, 'the case of using the two-pole type in the same manner as, main breaker 60' the main breaker 60 and the other one conductor for the feed other than the neutral side wire 96 to the neutral side terminal 66a of the Need to connect. When this conductor is an electric wire, the neutral side wire 96 is also an electric wire, and since these electric wires have sufficient current capacity, the diameter is large and it is difficult to connect the two electric wires. Therefore, it is conceivable to use a conductive bar formed by connecting a strip-shaped feed bar and a main bar as a feed conductor for a bipolar branch breaker.

  In the case of electric wires, in order to increase the current capacity, the electric wires themselves must be made thicker. However, in the case of conductive bars, the length in the width direction of the conductive bar can be made larger than the electric wires in order to increase the current capacity. The thickness of the conductive bar itself for the same current capacity as the electric wire does not need to be as large as the electric wire.

However, in this case, when the feed conductive bar is connected to the terminal device, the connection height between the feed conductive bar and the main bar connected to the two-pole branch breaker as the terminal frame moves. The position may be displaced, which may cause the branch breaker to be unable to connect to the main bar.
JP 2001-28810 A

  The present invention has been invented in view of the above-mentioned background art, and its problem is that the connection height position between the feed bar and the main bar is not displaced, and the power distribution that does not hinder the connection work with the main bar. To provide a board.

The distribution board according to the present invention is connected to a main breaker having a terminal device, a feed bar connected to the terminal device on one side, a main bar connected to the other side of the feed bar, and the main bar. A distribution board with a plurality of branch breakers,
The terminal device is provided at an end portion of the main breaker, and has a screw head on the front side of the main breaker, and a terminal frame screwed to the screw is located on the head of the screw. The terminal frame moves to the front side when the screw is tightened from the front side to the back side, having a connection port on the side surface of the end portion of the main breaker. Configured to tighten and connect the conductor inserted into the connection port with the terminal frame,
One side of the feed bar has a connecting portion through a bent portion, and the connecting portion is inserted between the terminal frame and the head through the connection port, and the terminal frame is tightened by tightening the screw. The connecting portion is pressed and connected to the head, and the bent portion is bent from the connecting portion to the front side along the side surface of the end portion of the main breaker. Is.

  Further, in the above configuration, the main breaker has terminal devices at both ends in the longitudinal direction, and the feed bar has an intermediate portion extending along the longitudinal direction of the main breaker on one side in the width direction of the main breaker, and on one side. Is bent to the main breaker side, and the other side is projected outward from the other side in the longitudinal direction of the main breaker.

  According to the configuration of the present invention, since one side of the feed bar has a bent portion bent from the connecting portion to the front side, another conductor is connected to the back side of the connecting portion at the connection port of the terminal device. However, since the front side of the connection portion is a bent portion, the connection becomes difficult. For this reason, other conductors are connected to the back side of the connecting portion of the feed bar, so the connecting portion does not move due to the movement of the terminal frame, and therefore the height position of the main bar connected to the other side of the feed bar is displaced. Without disturbing the connection work with the main bar.

  In addition, since the feed bar extends along the longitudinal direction of the main breaker on one side in the width direction of the main breaker, branch breakers are provided side by side on the other side in the width direction of the main breaker. The main breaker and the branch breaker can be connected by extending the main bar connected to the other side in the side-by-side direction of the branch breaker. Therefore, the main breaker and each branch breaker can be arranged adjacent to each other without a gap, and can be arranged neatly.

  An embodiment of the present invention will be described with reference to FIGS. That is, this distribution board has a main breaker 1, feed bars 2 and 3, main bars 4 and 5, and a plurality of branch breakers 6, which are housed in a case 7.

  FIG. 1 is a plan view of a case 7 with a cover (not shown) removed, and a holding member 11 is attached to the opening edge of the case 7 with a screw 12 at the center. The holding member 11 has a central portion along the inner bottom surface of the case 7 with a space, both end portions extending to the opening edge along the inner wall of the case 7, and the fixing piece 25 is bent on the opening edge. It is fixed to the case 7 with screws 12. At the center of the holding member 11, a rail 13, for example, a DIN rail standardized by the DIN standard is provided. The main breaker 1 and the plurality of branch breakers 6 are mounted side by side on the rail 13 of the holding member 11, the main breaker 1 is arranged at one end in the arrangement direction, and the plurality of branch breakers 6 are arranged adjacent to the main breaker 1. . Half of the plurality of branch breakers 6 on the main circuit breaker 1 side is a two-pole type breaker, and the other half is a one-pole type breaker that opens and closes only the power supply side line of the single-phase two-wire wiring path. A terminal block 26 having a load neutral side terminal is installed on the upper wall side in FIG.

  The main breaker 1 has a terminal device 14. Two terminal devices 14 are arranged at both ends in the longitudinal direction of the main body of the main breaker 1. In FIG. 1, the upper terminal device is the power supply connection side, and the lower side is the load connection side. Each terminal device 14 has a screw 15 on the front surface, a terminal frame (not shown) screwed to the screw 15 on the back side, a connection port 17 on the side surface, and the screw 15 on the front side. When the terminal frame is tightened from the back side, the terminal frame (not shown) is configured to move to the front side, and the conductor inserted into the connection port 17 is clamped and connected by the terminal frame (not shown). The main breaker 1 of the embodiment is for a single-phase two-wire wiring path, and is, for example, a two-pole type breaker that opens and closes both a power supply side line and a neutral side line.

  The feed bars 2 and 3 are connected to the terminal device 14 on one side. In the embodiment, for example, the feed bars 2 and 2 are connected to the two terminal devices 14 on one side in the longitudinal direction of the strip breaker 1, that is, the load connection side. One side of each of the book feed bars 2 and 3 is connected. These feed bars 2 and 3 have an intermediate portion extending along the longitudinal direction of the main breaker 1 on one side in the width direction of the main breaker 1, and bending one side toward the main breaker 1 to form a bent piece 21. At the same time, the other side protrudes outward from the other side in the longitudinal direction of the main breaker 1. The feed bars 2 and 3 according to the embodiment are arranged in a gap with the fixed piece 25 of the holding member 11 on the side opposite to the branch breaker 6 of the main breaker 1. Further, one side of the feed bars 2 and 3 includes a connection portion 18 serving as a conductor inserted into the connection port 17 of the terminal device 14, and a side surface of the terminal device 14 from the connection portion 18, that is, one end surface in the longitudinal direction of the main breaker 1. And a bent portion 19 that is bent to the front side. For example, the feed bar 2 on the power supply side has a thickness direction facing the side surface of the main breaker 1, and a bent piece 21 on one side is arranged in parallel to the end surface of the main breaker 1, and between the tip and the bent portion 19 Are connected by an inverted U-shaped connecting piece 20. A connecting piece 22 whose thickness direction faces the bottom surface of the case 7 extends to the other side of the feed bar 2, and a connecting tool, for example, a screw 23 is inserted through the connecting piece 22. The neutral-side feed bar 3 is disposed between the power-side feed bar 2 and the side surface of the main breaker 1 so that the thickness direction is directed to the bottom surface of the case 7, and one side is bent with the bent piece 21. The part 19 is connected integrally. On the other side, the connecting piece 24 is extended to a position closer to the case bottom side than the connecting piece 22, and a screw 27 is inserted.

The two main bars 4 and 5 are respectively connected to the other side of the feed bars 2 and 3. In the embodiment, for example, two strip-shaped main bars 4 and 5 are arranged along each power supply side end of the branch breaker 6 in which a plurality of main bars 4 and 5 are arranged. One end of the main bar 4 on the power supply side is connected to the feed bar 2 with a screw 23, and the connection piece 28 of the main bar 4 is connected to the terminal device 14 of the power supply side terminal of each branch breaker 6. In this case, a screw hole is formed at one end of the main bar 4, the screw 23 is screwed through the insertion hole of the connection piece 22 of the feed bar 2, and the one end of the main bar 4 and the connection piece 22 are connected. As a result, the load side terminal (the power source side) of the main breaker 1 is connected to the power source side terminal of each branch breaker 6. One end of the neutral side main bar 5 is connected to the screw 27 of the feed bar 3 by the same connection structure as the main bar 4, and the connection piece 29 is connected to the power supply side terminal of the bipolar breaker 6. . As a result, the neutral side of the load side terminal of the main breaker is connected to the neutral side of the power source side terminal of the two-pole branch breaker 6.

  All of the plurality of branch breakers 6 are thus connected to the main bar 4, and the main bar 5 is connected to the two-pole branch breaker 6. Thereby, the load side terminal of the two-pole branch breaker 6 can be connected to the load. Each terminal of the branch breaker 6 uses a terminal device 14 having the same structure as that of the main breaker 1.

  Further, the neutral side of the power source side terminal of the main breaker 1 and the terminal block 26 are connected by an electric wire 30. This electric wire 30 has the lower side of the holding member 11 turned up, and one end thereof is connected to the connection port 17 of the terminal device 14 of the power supply side terminal. 18 is inserted side by side and connected. By tightening the terminal screw 15, the connecting portion 18 and the electric wire 30 are tightened to the screw head side by the terminal frame and connected in the connection port 17. In this case, since the bent portion 19 extends upward in the connecting portion 18, the electric wire 30 is not connected to the upper side of the connecting portion 18, and is always connected to the back side of the connecting portion 18. For this reason, the connection part 18 is connected to the terminal device 14 at the same height as the case where the electric wire 30 is not connected. Therefore, the height of the main bar 4 does not change when the electric wire 30 is connected to the main breaker 1 together with the feed bar 2. Thereby, the load side terminal of the 1 pole type branch breaker 6 and the terminal of the terminal block 26 can be connected to a load.

It is a top view in the state where the cover of one embodiment of this invention was removed. It is the side view seen from the main breaker side in a case. It is the side view seen from the load side terminal side of the main circuit breaker in a case. It is a top view of a prior art example. It is a side view of the branch breaker in a case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Master breaker 2 Feed bar 3 Feed bar 4 Master bar 5 Master bar 6 Branch breaker 7 Case 11 Holding member 14 Terminal device 15 Screw 17 Connection port 18 Connection part 19 Bending part

Claims (2)

A main breaker having a terminal device, a feed bar connected on one side to the terminal device, a main bar connected to the other side of the feed bar, and a plurality of branch breakers connected to the main bar A distribution board,
The terminal device is provided at an end portion of the main breaker, and has a screw head on the front side of the main breaker, and a terminal frame screwed to the screw is located on the head of the screw. The terminal frame moves to the front side when the screw is tightened from the front side to the back side, having a connection port on the side surface of the end portion of the main breaker. Configured to tighten and connect the conductor inserted into the connection port with the terminal frame,
One side of the feed bar has a connecting portion through a bent portion, and the connecting portion is inserted between the terminal frame and the head through the connection port, and the terminal frame is tightened by tightening the screw. The connecting portion is pressed and connected to the head, and the bent portion is bent from the connecting portion to the front side along the side surface of the end portion of the main breaker. Distribution board. The master breaker has a terminal device in the longitudinal direction of both ends, the feed bar, the intermediate portion extends in the longitudinal direction of the main breaker in one widthwise side of the main breaker, whereas the side main breaker The distribution board according to claim 1, wherein the distribution board is bent to the side, and the other side protrudes outward from the other side in the longitudinal direction of the main breaker.

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