JP6920134B2 - Mounting structure of circuit breaker on mounting panel - Google Patents

Description

The present invention relates to a mounting structure of a circuit breaker installed in a distribution board or the like on a mounting panel.

Conventionally, when installing a circuit breaker in a distribution board, it is common to use a mounting panel. As a general structure for attaching the circuit breaker to the mounting panel, there is a structure in which a slit is provided in the mounting panel and a hook piece for hooking on the slit is provided on the bottom surface of the circuit breaker. Assuming that the power supply side terminal side of the device is the rear side and the load side terminal side is the front side, the hooking piece is projected to the lower side of the mounting panel through the slit, and then the circuit breaker is pushed to the rear side to form the slit. A hook piece is hooked at the rear end. However, the circuit breaker is not installed in this state. Therefore, for example, in the invention described in Patent Document 1, the circuit breaker is provided with a lock lever that is embedded in the main body case / protrudes from the main body case by sliding operation in the vertical direction. In the locked state, the lock lever is slid downward to protrude from the main body case, and the lock lever and the front end of the slit are brought into contact with each other so that the movement to the front side of the lock lever is restricted.

Japanese Patent No. 4153155

However, in the invention described in Patent Document 1, the lock lever must be operated one by one especially when the circuit breaker is attached to the attachment panel, which causes problems such as troublesome work and forgetting to lock. ..

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a mounting structure for a circuit breaker mounted on a mounting panel, which can be mounted on the mounting panel more easily.

In order to achieve the above object, in the present invention, two hook-shaped hook pieces that bend rearward are projected on the bottom surface of the main body case, and the front end bottom portion of the main body case is covered with the above. It is a mounting structure for mounting a circuit breaker provided with a lock member having a lock portion that can project downward from the bottom surface of the main body case to the mounting panel, and each of the hook pieces is inserted into the mounting panel. Two slits that are possible and extend in the front-rear direction and a locking slit that the lock portion can be inserted and extends in the front-rear direction are provided. The circuit is cut off by hooking each of the hook pieces to the rear end, positioning the lock portion in the lock slit, and bringing the front end of the lock slit into contact with the lock portion. While the device can be fixed to the mounting panel, in the circuit breaker, the lock position is such that the lock portion projects downward from the bottom surface of the main body case and the unlock position is embedded in the main body case. The lock member is provided with a mounting shaft that protrudes upward, and a coil spring is mounted so as to wind the mounting shaft. The lock portion is attached by the coil spring. It is urged downward in a state where no load is applied upward to the locking member, wherein the locking portion is held by said lock position.
The invention according to claim 2 is characterized in that, in the invention according to claim 1, the front-rear length of the lock portion and the front-rear length of the lock slit are shorter than the front-rear length of the hook piece. do.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lock portion is provided with a protruding portion protruding rearward, and the hook piece is inserted in the front portion of the slit. The feature is that the protruding portion abuts on the surface of the mounting panel even when the front end of the lock portion is located in front of the mounting panel.

According to the present invention, in the lock member provided in the circuit breaker, the lock portion moves up and down between the lock position in which the lock portion protrudes downward from the bottom surface of the main body case and the unlock position in which the lock portion is embedded in the main body case. In addition to being slidable, the lock member is provided with a mounting shaft that protrudes upward, and a coil spring is mounted so as to wind the mounting shaft. The lock portion is urged downward by the coil spring, and the lock member The lock portion is held in the locked position when no upward load is applied to the lock portion. Therefore, when mounting the circuit breaker on the mounting panel, simply apply a downward load to the circuit breaker from the state where the hook piece is inserted through the slit and the lock portion is in contact with the surface of the mounting panel to lock the circuit breaker. The part automatically slides to the unlock position side, and if the circuit breaker is pushed backward so that the hook piece is hooked on one end of the slit as it is, the lock part finally returns to the lock position and the circuit The circuit breaker will be fixed to the mounting panel. That is, the operator can fix the circuit breaker to the mounting panel without operating the lock member one by one. Therefore, the circuit breaker can be fixed to the mounting panel more easily than before without forgetting to lock the circuit breaker.
Further, according to the invention of claim 2, since the front-rear length of the lock portion and the front-rear length of the lock slit are formed to be shorter than the front-rear length of the hook piece, the hook piece is erroneously used. The circuit breaker can be mounted on the mounting panel more easily without being inserted into the lock slit.
Further, according to the third aspect of the present invention, the lock portion is provided with a protruding portion protruding to the rear side, and when the hook piece is inserted in the front portion of the slit, the front end of the lock portion is attached. Even if it is located in front of the panel, the protruding portion comes into contact with the surface of the mounting panel. Therefore, when a downward load is applied to the circuit breaker from the state where the hook piece is inserted through the slit, the lock portion is not located on the mounting panel and the lock portion does not slide to the unlock position side. The situation does not occur, and the circuit breaker can be mounted on the mounting panel very easily.

It is a perspective explanatory view which showed the circuit breaker attached to the attachment panel. It is explanatory drawing which showed the circuit breaker attached to the attachment panel from the side. It is explanatory drawing which showed the lock member, (a) is a perspective view, (b) is a side view. It is explanatory drawing which showed the state which the circuit breaker was locked by the lock member. It is explanatory drawing which showed the state which the lock by the lock member was released. It is explanatory drawing which showed the state which the contact piece is in contact with the surface of a mounting panel.

Hereinafter, the mounting structure of the circuit breaker according to the embodiment of the present invention on the mounting panel will be described in detail with reference to the drawings.
FIG. 1 is a perspective explanatory view showing a circuit breaker 1 attached to the mounting panel 20, and FIG. 2 is an explanatory view showing the circuit breaker 1 in the same state from the side. 3A and 3B are explanatory views showing a lock member 30, where FIG. 3A is a perspective view and FIG. 3B is a side view. FIG. 4 is an explanatory view showing a state in which the circuit breaker 1 is locked by the lock member 30, and FIG. 5 is an explanatory view showing a state in which the lock member 30 is unlocked. FIG. 6 is an explanatory view showing a state in which the contact piece 32c is in contact with the surface of the mounting panel 20. The load side terminal 3 side will be described as the front side of the circuit breaker 1.

The circuit breaker 1 has a main body case 4 formed by assembling a pair of left and right cases made of synthetic resin, and a handle 7 is provided on the upper surface of the main body case 4 so as to be rotatable in the front-rear direction. .. Then, by rotating the handle 7, a shutoff mechanism (not shown) incorporated in the main body case 4 is activated, and an electric path that electrically connects the power supply side terminal 2 and the load side terminal 3 described later is connected / It is designed to be released. Further, on the bottom surface of the main body case 4, a set of hook-shaped hook pieces (front hook piece 8 and rear hook piece 9) that bend rearward are projected downward. An overcurrent detection mechanism (not shown) is also provided in the main body case 4, and the cutoff mechanism opens when an overcurrent is detected.

Further, on the rear surface of the circuit breaker 1, a power supply side terminal 2 having plug-in type terminals P1, P2, and P3 provided in a row in the vertical direction is arranged. Each terminal P1 to P3 is formed by cutting out a U-shape penetrating the main body case 4 in the left-right direction, and is a conductor bar (not shown) which is a power supply line arranged in a distribution board or the like. A branch bar (not shown) branched from the conductor bar can be inserted and connected.

On the other hand, the front surface of the circuit breaker 1 is formed on an inclined surface that inclines downward toward the front side, and three terminals L1 and L2, to which load wiring (not shown) can be inserted and connected, are formed on the inclined surface. A load-side terminal 3 is arranged in which L3 (not shown because the terminal L2 is covered by the cover member 10) is provided in a row in the inclined direction. Each of the terminals L1 to L3 has a terminal hole 5 into which the load wiring can be inserted in a direction orthogonal to the inclined surface, and is installed at a position inside the terminal hole 5 in the main body case 4 through the terminal hole 5. It has a terminal fitting (not shown) that can be contacted with the inserted load wiring, and functions as a so-called quick connection terminal.

Further, in each of the terminals L1 to L3, an insertion hole 6 into which a measurement terminal of an instrument for performing an insulation resistance measurement test can be inserted is provided adjacent to the lower side of the terminal hole 5. Each insertion hole 6 is provided so that the insertion direction of the measurement terminal is in the vertical direction, that is, in a direction different from the insertion direction of the load wiring. Further, a measuring metal fitting (not shown) that comes into contact with the terminal metal fitting inside the adjacent terminal hole 5 is arranged at a position inside the insertion hole 6 in the main body case 4. Further, on the front surface of the circuit breaker 1, a cover member 10 covering the unused terminals of the terminals L1 to L3 and the insertion hole 6 is slidably attached along the guide wall 11.

In addition, the front end of the bottom of the main body case 4 is provided with a storage recess 25 that opens downward and can store a part of the lock member 30, which will be described later. Further, an operation window 26 communicating with the storage recess 25 is provided at the bottom of the front surface of the main body case 4. A lock member 30 for preventing the circuit breaker 1 from falling off from the mounting panel 20 is assembled in the storage recess 25. The front hook piece 8, the rear hook piece 9, and the lock member 30 are provided in a straight line in the front-rear direction.

The lock member 30 is an operation piece having a band-shaped rising portion 31a extending in the vertical direction, a knob portion 31b protruding from the upper end of the raising portion 31a to the front side, and a base portion 31c protruding from the lower end of the raising portion 31a to the rear side. 31 and a lock portion 32 projecting downward from the base portion 31c are integrally provided. Further, a mounting shaft 32a projecting upward is provided on the upper surface of the lock portion 32, and the coil spring 33 is mounted so as to wind the mounting shaft 32a. Further, the left and right sides of the mounting shaft 32a in the lock portion 32 come into contact with the surface of the main body case 4 (specifically, the inner surface of the storage recess 25) when the lock member 30 is attached to the main body case 4, and the lock member 30 Guide blocks 32b and 32b are provided to smoothly guide the movement of the vehicle in the vertical direction. In addition, a contact piece 32c projecting to the rear side is provided at the lower part of the lock portion 32. However, the length of the lock portion 32 (including the contact piece 32c) in the front-rear direction is shorter than the front-rear length of the lock slit 21 of the mounting panel 20 described later, and is shorter than the front-rear length of the front hook piece 8. Is also getting shorter. In such a lock member 30, the guide blocks 32b, 32b and the coil spring 33 are housed in the storage recess 25, and the operation piece 31 is assembled in a state of protruding forward of the main body case 4 through the operation window 26.

Then, in the lock member 30, normally (a state in which an upward load is not applied to the lock member 30), the base portion 31c of the operation piece 31 is in contact with the lower end of the operation window 26 due to the urging force of the coil spring 33. The lock portion 32 is held at a lock position protruding downward from the bottom surface of the main body case 4. Further, an upward load is directly applied to the lock portion 32, or the operation piece 31 is operated upward against the urging force of the coil spring 33, so that the base portion 31c of the operation piece 31 hits the upper end of the operation window 26. When it moves until it comes into contact, the lock portion 32 moves to the unlocked position embedded in the main body case 4.

On the other hand, the mounting panel 20 has a front end bent downward, and a locking slit 21 and a front slit 22 are opened on the front edge side, while a rear slit 23 is opened behind the front slit 22. ing. The locking slit 21, the front slit 22, and the rear slit 23 are provided in a straight line in the front-rear direction, and a plurality of sets are provided at predetermined intervals in the parallel direction of the circuit breaker 1.

The lock slit 21 is a slit that is slightly longer in the front-rear direction than the lock portion 32 and shorter than the front-rear length of the front hook piece 8, and only the lock portion 32 can be inserted. The front end of the lock slit 21 and the lock portion 32 in the inserted state interfere with each other to restrict the movement of the circuit breaker 1 in the front-rear direction.

The front slit 22 is formed longer in the front-rear direction than the locking slit 21, and the circuit breaker is formed by inserting the front hook piece 8 and hooking the bent portion of the front hook piece 8 at the rear end. The upward movement of 1 is regulated. Further, the distance from the rear end of the front slit 22 to the front end of the lock slit 21 is the same as the distance in the front-rear direction between the lock portion 32 in the circuit breaker 1 and the bent portion of the front hook piece 8. .. Further, the front slit 22 operates the front end of the circuit breaker 1 (particularly, the operation of the lock member 30) when the front hook piece 8 is inserted from the front end position of the front slit 22 when the circuit breaker 1 is attached to the mounting panel 20. The piece 31 and the front end of the lock portion 32) are provided at positions so as to project forward from the mounting panel 20.

The rear slit 23 is a slit through which the rear hooking piece 9 can be inserted, and by hooking the bent portion of the rear hooking piece 9 at the rear end, the movement of the circuit breaker 1 in the upward direction is restricted. It has become like. Further, the rear slit 23 is formed to be longer in the front-rear direction than the front slit 22, so that when the front hook piece 8 is inserted into the front slit 22, the rear hook piece 9 is also inserted into the rear slit 23 at the same time. It has become. Further, the distance from the rear end of the rear slit 23 to the rear end of the front slit 22 in the front-rear direction is the same as the front-rear distance between the front hook piece 8 and the rear hook piece 9 in the circuit breaker 1. When the front hooking piece 8 is hooked by the front slit, the bent portion of the rear hooking piece 9 is also hooked at the same time.

Here, the work of attaching / detaching the circuit breaker 1 having the lock member 30 to / from the mounting panel 20 will be described.
First, when mounting the circuit breaker 1 on the mounting panel 20, the circuit breaker 1 is brought close to the mounting panel 20 from above the mounting panel 20, and the front hooking piece 8 is placed in the front slit 22 and the rear hooking piece 9 is mounted. Is inserted into the rear slit 23, respectively. At this time, in order to avoid interference with the conductor bar or the like arranged on the rear side of the rear slit 23, the front hook piece 8 is inserted at the front end position of the front slit 22. Therefore, although the operation piece 31 of the lock member 30 and the front end of the lock portion 32 in the circuit breaker 1 are in front of the mounting panel 20, the contact piece 32c extending to the rear side comes into contact with the leading edge of the mounting panel 20. Therefore, the bottom surface of the circuit breaker 1 (particularly the bottom surface on the front side) is in a state of floating from the surface of the mounting panel 20 (FIG. 6). Therefore, from this state, a load is applied downward to the circuit breaker 1 to move the lock member 30 to the unlock position side, and the bottom surface of the circuit breaker 1 is brought into contact with the surface of the mounting panel 20. In that state, push the circuit breaker 1 to the rear side, insert the conductor bar into the power supply side terminal 2 and connect it, and attach the front hook stop piece 8 to the rear end of the front slit 22 and the rear hook stop piece 9 to the rear. It suffices to hook each of the rear ends of the slits 23. When both hooking pieces 8 and 9 are hooked on the slits 22 and 23, the entire locking portion 32 reaches above the locking slit 21. Therefore, the lock portion 32 automatically protrudes into the lock slit 21 by the urging force of the coil spring 33 and returns to the lock position, abuts on the front end of the lock slit 21 (FIG. 4), and the circuit breaker 1 The attachment to the attachment panel 20 and the connection with the conductor bar of the circuit breaker 1 are completed.

On the other hand, when removing the circuit breaker 1 from the mounting panel 20, the operation piece 31 is operated upward to move the lock portion 32 to the unlocked position. Then, the interference between the lock portion 32 and the front end of the lock slit 21 is released (FIG. 5), that is, the fixed state of the circuit breaker 1 to the mounting panel 20 is released, so that the operation piece 31 is pulled up. As it is, pull out the circuit breaker 1 to the front side (pull out until the lock portion 32 is positioned in front of the lock slit 21), pull out the conductor bar from the power supply side terminal 2, and pull out the front hook stop piece 8 and the front slit 22. The hooked state with and the hooked state with the rear hooking piece 9 and the hooked state with the rear slit 23 are released, respectively. After that, the circuit breaker 1 may be lifted upward, and the front hooking piece 8 may be pulled out from the front slit 22, and the rear hooking piece 9 may be pulled out from the rear slit 23, respectively. When the hooked state of the hook pieces 8 and 9 and the slits 22 and 23 is released, the pulling operation of the operation piece 31 may also be released.

According to the mounting structure of the circuit breaker 1 having the above configuration on the mounting panel 20, in the lock member 30, the lock portion 32 protrudes downward from the bottom surface of the main body case 4, and the main body case 4 It is possible to slide up and down between the unlocked position to be embedded inside, and the lock portion 32 is urged downward to the lock member 30, so that the lock member 30 is not loaded upward. In the state, a coil spring 33 that holds the lock portion 32 at the locked position is attached. Therefore, when mounting the circuit breaker 1 on the mounting panel 20, both hooking pieces 8 and 9 are inserted into the corresponding slits 22 and 23, respectively, and the contact piece 32c is in contact with the surface of the mounting panel 20. By simply applying a downward load to the circuit breaker 1, the lock portion 32 automatically slides to the unlock position side, and the front hook stop piece 8 is directly attached to the rear end of the front slit 22 to the rear hook stop piece. When the circuit breaker 1 is pushed backward so that the 9 is hooked on the rear slit 23, the lock portion 32 finally returns to the lock position and comes into contact with the front end of the lock slit 21, and the circuit breaker 1 Will be fixed to the mounting panel 20. That is, for the operator, it is not necessary to operate the lock member 30 one by one when fixing the circuit breaker 1 to the mounting panel 20. Therefore, the circuit breaker 1 can be fixed to the mounting panel 20 more easily than before without forgetting to lock the circuit breaker 1.

Further, since the front-rear length of the lock portion 32 and the front-rear length of the lock slit 21 are formed to be shorter than the front-rear length of the front hook piece 8, the front hook piece 8 is mistakenly made into the lock slit 21. The circuit breaker 1 can be attached to the attachment panel 20 more easily without being inserted.
Further, the lock portion 32 is provided with a contact piece 32c protruding to the rear side, and when the front hook piece 8 is inserted at the front end position of the front slit 22, the operation piece 31 and the front end of the lock portion 32 are inserted. The contact piece 32c comes into contact with the surface of the mounting panel 20 even if it is located in front of the mounting panel 20. Therefore, when a downward load is applied to the circuit breaker 1 from the state where both hook pieces 8 and 9 are inserted through the slits 22 and 23, the lock portion 32 is not located on the mounting panel 20 and is locked. The situation in which the portion 32 does not slide to the unlock position side does not occur, and the circuit breaker 1 can be attached to the attachment panel 20 extremely easily.

The configuration relating to the mounting structure of the circuit breaker of the present invention on the mounting panel is not limited to the embodiment of the above embodiment, and the overall structure of the circuit breaker and the mounting panel is, of course, the lock member. The configuration and the like according to the above can also be appropriately changed as necessary without departing from the spirit of the present invention.

For example, in the above embodiment, the coil spring is attached to the lock portion as the elastic means, but the leaf spring portion may be integrally formed with the lock portion to form the elastic means, and what kind of elastic means is provided. Can be redesigned as appropriate.
In addition, it goes without saying that the front and rear lengths of the lock part, the apron stop piece, the lock slit, the front slit, etc. can be changed, and whether or not a contact piece is provided on the lock part is also determined. It can be changed as appropriate.

1 ... Circuit breaker, 2 ... Power supply side terminal, 3 ... Load side terminal, 4 ... Main body case, 8 ... Front hook stop piece, 9 ... Rear hook stop piece, 20 ... Mounting panel, 21・ ・ Lock slit, 22 ・ ・ Front slit, 23 ・ ・ Rear slit, 25 ・ ・ Storage recess, 26 ・ ・ Operation window, 30 ・ ・ Lock member, 31 ・ ・ Operation piece, 32 ・ ・ Lock part, 32c ・-Abutment piece (protruding part), 33 ... Coil spring (elastic means).

Claims (3)

Two hook-shaped hook pieces that bend rearward are projected on the bottom surface of the main body case, and a lock portion that can protrude downward from the bottom surface of the main body case is provided on the bottom of the front end of the main body case. It is a mounting structure for mounting a circuit breaker provided with a lock member equipped with a lock member to the mounting panel.
The mounting panel is provided with two slits in which each of the hook pieces can be inserted and extends in the front-rear direction, and a locking slit in which the lock portion can be inserted and extends in the front-rear direction.
Each of the hook pieces is inserted into the corresponding slit, and each of the hook pieces is hooked at the rear end of each of the slits, and the lock portion is positioned in the lock slit for the lock. By bringing the front end of the slit into contact with the lock portion, the circuit breaker can be fixed to the mounting panel, while the circuit breaker can be fixed to the mounting panel.
In the circuit breaker, the lock portion can slide up and down between the lock position protruding downward from the bottom surface of the main body case and the unlock position embedded in the main body case.
The locking member, the mounting shaft is provided which projects upwardly, said has a coil spring is mounted so as to wind the mounting shaft, the locking portion is urged downward by the coil spring upwardly to said locking member A structure for mounting a circuit breaker on a mounting panel, wherein the lock portion is held at the locked position when the load is not applied. The structure for mounting a circuit breaker on a mounting panel according to claim 1, wherein the front-rear length of the lock portion and the front-rear length of the lock slit are shorter than the front-rear length of the hook piece. The lock portion is provided with a protruding portion that protrudes to the rear side.
When the hook piece is inserted through the front portion of the slit, the protruding portion abuts on the surface of the mounting panel even if the front end of the lock portion is located in front of the mounting panel. The mounting structure of the circuit breaker according to claim 1 or 2 to the mounting panel.

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