JP2012234711A - Fitting structure of circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure capable of preventing a fitting lock between an internal device and a fitting plate from released for easy detachment of the internal device when fitting a power distribution panel on a construction material such as a wall surface.SOLUTION: In the structure of a fitting plate and a circuit breaker for fitting the circuit breaker to the fitting plate side where a bus line such as a power distribution panel is provided, the circuit breaker is provided with a lock lever capable of selecting, using an external knob, either protruding or not-protruding from the bottom surface of the circuit breaker. An engagement part of the lock lever is provided to the fitting plate side. When the circuit breaker placed on the fitting plate is slid toward the bus line, the bus line is inserted in a power source side terminal part. The lock lever protrudes from the bottom surface of the circuit breaker to engage with the engagement part on the fitting plate side. As a result, the action of the circuit breaker to be taken out from the bus line is regulated. An enclosing part is formed around the external knob such that a movement locus of the external knob is avoided.

Description

  The present invention relates to a structure of a circuit breaker and a mounting plate for mounting a circuit breaker to a mounting plate of a distribution board.

  When installing a distribution board on a construction material that constitutes a wall surface, etc., in general, the wires drawn from the wall surface to the side where the distribution board is installed are connected to the distribution board box. The box is temporarily pulled into the box from the hole, and the box of the distribution board is pressed against the wall surface in that state, and the box is attached to a predetermined position on the wall surface, and then attached by screwing.

Inside the distribution board box, there is an insole constructed by attaching internal devices such as the main switch and branch switch to the mounting plate. When installing the distribution board on the wall, the box When the box of the distribution board is pressed against the wall surface in the state where the electric wire is pulled in, the tip of the electric wire and the covering part of the side face abut against the insole, and the insole is A force may be applied to push back in the direction opposite to the direction in which the distribution board is pressed against the wall surface.
Usually, the insole of the mounting plate or the like is screwed and fixed in the box, and as described above, force is applied so that it is pushed back in the direction opposite to the direction in which the distribution board box is pressed against the wall surface. Even if it is received, it cannot be removed from the box.

  Now, a circuit breaker such as a main switch or a branch switch as an internal device is attached to a mounting plate with a structure as shown in Patent Document 1. That is, as a structure for attaching the plug-in type circuit breaker 1 to the attachment plate 2, the claw portion 3 and the claw portion 4 for restricting the movement in the direction perpendicular to the attachment plate 2 are provided on the attachment plate 2 and the claw portion 3, 4 is provided with a recess 5 and a recess 6 corresponding to the circuit breaker 1, respectively, and a lock lever 7 that restricts movement in a direction of removing the circuit breaker 1 from the bus bars 11, 12 provided on the mounting plate 2 is provided with the circuit breaker. 1 and the mounting plate 2 is provided with a fitting portion 8 into which the lock lever 7 is fitted, and a plug-in type circuit breaker is mounted while being slid parallel to the mounting plate.

  Specifically, the lock lever 7 is configured so that it can be selectively selected with an external knob, which protrudes from the bottom surface of the circuit breaker 1. The circuit breaker with the lock lever not projecting from the bottom surface is placed on the mounting plate 2, the claw portion of the mounting plate 2 and the recess are fitted, and then the lock lever is projected from the bottom surface to load the circuit breaker It is a structure that prevents it from coming off to the side.

JP 2002-150911 A

  When installing the distribution board on a construction material such as a wall, the mounting plate is pushed back in the direction opposite to the direction in which the box of the distribution board is pressed against the wall by the wires drawn from the wall. In rare cases, the end of the wire drawn from the wiring hole of the box or the coating on the side comes into contact with the external knob of the lock lever, and the lock lever is There is a possibility that the stopper is released by being pushed back in a direction not protruding from the bottom surface.

  In the state where the locking by the lock lever is released, the circuit breaker is restricted in position in the direction perpendicular to the mounting plate and in the juxtaposed direction, but the circuit breaker is prevented from falling off from the power supply side terminal toward the load side terminal. There is a risk that the power supply side terminal may come off from the bus bar without being regulated.

  However, in the initial state before the distribution board is pressed against the wall surface, the lock lever protrudes from the bottom surface of the circuit breaker and the circuit breaker is prevented from coming off. It is hard to notice that the lock lever has been released, and if you start using it by connecting the wire to the load side terminal, the circuit breaker will come off the bus line due to secular use and vibration, etc. Otherwise, there is a risk that various electrical defects such as poor contact between the busbar and the terminal, abnormal heat generation of the terminal part, and occurrence of a power failure may occur.

  The present invention solves the above-described problems, and when the distribution board is attached to a construction material such as a wall surface, the electric wire drawn from the wall surface or the like to the side where the distribution board is attached constitutes the insole. An object of the present invention is to provide a mounting structure that can prevent the internal device from coming off easily due to contact with and sliding against the internal device attached to the mounting plate, thereby releasing the mounting lock between the internal device and the mounting plate. Yes.

  The circuit breaker mounting structure according to the present invention includes a circuit breaker and mounting for mounting a plug-in type circuit breaker provided with a plug-in terminal fitting on a mounting plate side provided with a bus bar such as a distribution board. As a plate structure, a lock lever is provided on the circuit breaker that can be selectively selected with an external knob, protruding from the bottom of the circuit breaker, and a fitting portion for the lock lever is provided on the mounting plate side. When the circuit breaker placed on the mounting plate is slid in the direction of the busbar, the busbar is inserted into the plug-in terminal fitting, and the lock lever protrudes from the bottom of the circuit breaker and fits on the mounting plate side. It is provided with a structure in which movement in the direction of removing the circuit breaker from the bus bar is restricted by fitting in the joint, and the surrounding part is avoided around the outer knob to avoid the movement locus of the outer knob. Formation It is obtained by providing a mounting structure for a circuit breaker as characterized Rukoto.

  According to such a configuration, when the box of the distribution board is pressed against the wall surface, even if the electric wire comes into contact with and slides on the internal device attached to the mounting plate constituting the insole, The external knob, which is the mounting lock with the mounting plate, prevents the wires from coming into contact with the external knob by the surrounding enclosure, and the mounting lock between the circuit breaker and the mounting plate is released, making it easier for the internal device to come off. Can be prevented.

  Moreover, you may comprise by forming the rib which protruded in the direction which removes a circuit breaker from the said bus | bath at least in the bottom face side of the said external knob as a part of said surrounding part.

  According to such a configuration, the size of the surrounding portion can be reduced as compared with the case where the entire periphery is surrounded, and the resin required for the container constituting the circuit breaker can be reduced.

  Moreover, you may comprise so that the said external knob may not protrude outside the said enclosure part by the side view which faces a circuit breaker from the juxtaposition direction of the said circuit breaker.

  According to such a configuration, since the external knob does not protrude outward in a side view of the body of the circuit breaker, even if the electric wire may contact the circuit breaker, it does not contact the external knob. It is possible to prevent the mounting lock between the circuit breaker and the mounting plate from being released and the internal device from being easily disconnected. Further, when the electric wire is routed in the distribution board, the electric wire coating is not damaged by being caught by the external knob.

  Moreover, you may comprise so that the said external knob may not protrude outside the said enclosure part by the bottom view which faces a circuit breaker from the attachment surface side of the said circuit breaker.

  According to such a configuration, since the external knob does not protrude outward in the bottom view of the circuit breaker body, the electric wire may contact the circuit breaker but may contact the external knob from the bottom direction. Since the external knob does not receive the force in the direction in which the circuit breaker is pushed up by the electric wire, it is possible to prevent the mounting lock between the circuit breaker and the mounting plate from being released and the internal device from being easily detached. Further, when the electric wire is routed in the distribution board, the electric wire coating is not damaged by being caught by the external knob.

  Moreover, you may comprise so that the said external knob may not protrude outside the said enclosure part by the side view and bottom view of the said circuit breaker.

  According to such a configuration, since the external knob does not protrude outward in a side view and a bottom view of the body of the circuit breaker, the electric wire may contact the circuit breaker but may contact the external knob. Since the external knob does not receive the force in the direction in which the circuit breaker is pushed up by the electric wire, it is possible to prevent the mounting lock between the circuit breaker and the mounting plate from being released and the internal device from being easily detached. Further, when the electric wire is routed in the distribution board, the electric wire coating is not damaged by being caught by the external knob.

  As described above, according to the present invention, when the distribution board is attached to a construction material such as a wall surface, the electric wires drawn from the wall surface or the like to the side where the distribution board is attached are attached to the attachment plate constituting the insole. It is possible to provide an attachment structure that can prevent the internal device from being easily detached due to the attachment lock between the internal device and the mounting plate being released by abutting and sliding on the attached internal device. Further, since the electric wires do not come into contact with and slide on the external knob, there is an effect that the work can be improved because the distribution board can be smoothly pushed without being caught when it is pushed against the wall surface.

Example of mounting structure of circuit breaker and mounting plate. Example of mounting structure of circuit breaker and mounting plate. Example of the mounting structure as seen from the bottom side of the circuit breaker and the mounting plate. The expansion explanatory view of a lock lever part. Explanatory drawing of the principal part side view of a circuit breaker. Explanatory drawing of the principal part bottom view of a circuit breaker. Example of mounting structure of conventional circuit breaker and mounting plate.

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of a circuit breaker mounting structure according to the present invention.

  1 to 3, reference numeral 1 is a circuit breaker having a plug-in type terminal on the power supply side, 2 is a mounting plate provided on the distribution board, and 3 and 4 are mounting plates provided on the mounting plate. The claw part a and the claw parts b, 5 and 6 for restricting the movement in the direction perpendicular to the plate are provided on the circuit breaker side corresponding to the claw part, and the recessed part a and the recessed parts b and 7 are provided on the circuit breaker side. A lock lever for restricting movement in the direction in which the circuit breaker is removed from the mounting plate, 8 is a fitting portion on the mounting plate side to be fitted with the lock lever 7, and 9 and 10 are protrusions a for regulating the side surface of the circuit breaker. And protrusion b. Reference numerals 11 and 12 denote bus bars provided on the mounting plate, reference numerals 13 and 14 denote plug-in terminal portions, and reference numerals 15 and 16 denote plug-in terminal fittings. The claw part 3 of 3 and the claw part 4 of 4 are extended from the power supply side toward the load side (open), and the concave part 5 and the concave part b of 6 are opened toward the power supply side. Thus, when the circuit breaker 1 is placed on the mounting plate 2 and slid in the direction of the bus, the three claw portions a and the concave portion a of 5 are fitted to the four claw portions b and the concave portion b of the fitting. The movement in the direction perpendicular to the plate can be restricted.

  4A and 4B show a state where the lock lever 7 does not protrude from the bottom surface of the circuit breaker and a state where the lock lever 7 protrudes. The lock lever 7 can be operated with a finger hook portion 702 as an external knob selectively in the vertical direction in the figure between the state in which the lock lever 7 does not protrude from the bottom surface and the state in which the lock lever 7 protrudes, whereby the locking portion 703 protrudes from the bottom surface. Or do not protrude.

  The position of the lock lever 7 that protrudes from the bottom surface of the circuit breaker and the position that does not protrude can be maintained by sliding the side surfaces of the lock lever with the inner wall of the circuit breaker 1 body. In this case, the two positions in the state of projecting from the bottom surface of the circuit breaker and the case of not projecting can be stably maintained.

  In addition, an encircling portion 704 is formed around the finger hook portion 702 so as to avoid the movement trajectory in the vertical direction so as not to hinder the movement of the finger hook portion 702. The surrounding portion 704 is configured by forming ribs on a part of the body of the circuit breaker on the side surfaces 704c and 704d and the bottom surfaces 704a and 704b of the finger hook portion 702 which is an external knob of the lock lever 7. doing.

  In the present embodiment, the bottom surface side 704a and 704b portions constituting the surrounding portion 704 are configured so as to be separated to the extent that the electric wire connected to the load side terminal portion of the circuit breaker does not enter from the bottom surface side. . This is because the device bodies of the circuit breakers are divided in the juxtaposed direction, and a predetermined margin is given to the fitting between the surrounding portions provided in the respective device bodies. Note that the bottom side 704a and 704b may be closely contacted without being separated.

  Further, the 704a portion and the 704b portion on the bottom side of the surrounding portion 704 are configured such that the distance from the finger hook portion 702 becomes larger as it goes to the central portion of the body. Accordingly, when the finger hook portion 702 is pulled up, the finger can easily enter between the surrounding portion 704 and the finger hook portion.

  In addition, an encircling part may be formed on the front side of the finger hanging part 702 so as to face the encircling part on the bottom surface side so as to surround the finger hanging part. Accordingly, it is possible to prevent foreign matters from entering from the front side in addition to the bottom side and the side surface.

  As shown in FIGS. 5 and 6, the height of the rib forming the surrounding portion 704 is as the external knob in a side view facing the circuit breaker 1 from the parallel direction of the circuit breaker 1. The finger hook portion 702 is provided so as not to protrude outward from the surrounding portion 704. Further, the finger hooking portion 702 is provided so as not to protrude outward from the surrounding portion 704 when viewed from the bottom facing the circuit breaker 1 from the mounting surface side of the circuit breaker 1.

  A case where the circuit breaker is mounted on the mounting plate side by the mounting structure configured as described above will be described. First, in FIG. 1, the locking portion 703 of the lock lever 7 of the circuit breaker 1 is set so as not to protrude from the bottom surface of the circuit breaker, so that the breaker comes between the protruding portions a9 and b10 of the mounting plate. In addition, it is placed on the mounting plate so that the four claw portions b come to the openings of the recess portions 6 of the circuit breaker. At this time, the claw portions 3 and 4 and the recesses 5 and 6 of the circuit breaker are not engaged with each other. Next, when the circuit breaker 1 is slid in the direction of the buses 11 and 12, the buses 11 and 12 are inserted into the plug-in terminal fittings 15 and 16, and the claw portion 3 and the claw portion provided on the mounting plate side. 4 engages with the recesses 5 and 6 of the circuit breaker, respectively.

  As described above, the circuit breaker is restricted from moving in the upward direction (vertical direction with respect to the mounting plate) and the side surface in FIG. 1, but in this state, the circuit breaker is in a direction far from the buses 11 and 12 (load of the circuit breaker). It can be removed in the lateral direction.

  Next, when the finger hooking portion 702 of the lock lever 7 is pressed in the direction of the mounting plate with a finger, the locking portion 703 protrudes from the bottom surface of the circuit breaker and is fitted into the fitting portion 8 on the mounting plate side. Thereby, the movement of the direction which removes a circuit breaker from a bus-bar can be controlled, and it will be in the state where the circuit breaker 1 was attached to the attachment board 2. FIG.

  Subsequently, when the distribution board is attached to the wall surface, the electric wire drawn out from the wall surface to the side where the distribution board is attached is temporarily drawn into the box from the wiring hole provided in the box of the distribution board. And when pressing the box of the distribution board with the wires pulled in the direction of the wall, the direction in which the insole presses the distribution board against the wall surface by the wires coming into contact with the insole and sliding A force is applied to push back in the opposite direction.

  At this time, since the insole is screwed and fixed in the box, it does not come off the box. In addition, since the circuit breaker 1 is restricted from moving in three directions in the vertical direction, the side surface direction, and the direction in which the circuit breaker is removed from the bus bar with respect to the mounting plate 2, the electric wire abuts against the circuit breaker and slides. Even if it moves, the circuit breaker does not come off the insole.

  Further, an encircling portion 704 is provided in the vicinity of the finger hook portion 702, and the finger hook portion 702 does not protrude outward from the envelop portion 704, so that the electric wire is not in contact with the finger hook portion 702. The wire abuts against the surrounding portion 704, and the electric wire does not directly abut against or slide on the finger hook portion 702, thereby eliminating the possibility of releasing the circuit breaker from the busbar.

  Unless the direction in which the circuit breaker is removed from the busbar is not released, the circuit breaker 1 is not released from the vertical and lateral restrictions on the mounting plate 2, and the circuit breaker 1 is removed from the busbar from the mounting plate 2. There is no possibility that various electrical failures such as contact failure between the busbar and the terminal, abnormal heat generation of the terminal portion, occurrence of power failure, etc. occur.

  Next, the case where the circuit breaker 1 is removed from the mounting plate 2 will be described. First, the finger hooking portion 702 of the lock lever 7 is pulled up with a finger in the direction opposite to the mounting plate, and the fitting between the fitting portion 8 and the locking portion 703 of the lock lever 7 is released. At this time, the portions 704a and 704b on the bottom surface side of the surrounding portion 704 are configured so that the distance from the finger hook portion 702 increases as the central portion of the body is advanced, so the finger hook portion 702 is pulled up. In this case, it is easy for a finger to enter between the surrounding portion 704 and the finger hook portion.

  Next, the circuit breaker 1 is moved so as to be pulled out in the direction opposite to the bus bars 11 and 12, so that the fitting of the claw part 3 and the claw part 4 with the recessed part 5 and the recessed part 6 is released. In this state, the circuit breaker 1 can be removed from the mounting plate 2 by lifting it from the mounting plate.

  As described above, when installing the distribution board to a construction material such as a wall surface, the wires drawn from the wall surface or the like to the side where the distribution board is attached are attached to the mounting plate constituting the insole. An attachment structure that can prevent the internal device from coming off easily due to contact with and sliding against the internal device and releasing the attachment lock between the internal device and the attachment plate.

  In the embodiment, the projections 9 and 10 for regulating the position of the side surface of the circuit breaker are provided. However, the fitting direction of the claw portions 3 and 4 and the recesses 5 and 6 is determined by the circuit breaker. In addition to fitting in the direction connecting the power supply side and the load side, a fitting portion in the juxtaposed direction is formed in the concave portions 5 and 6 so that fitting in the juxtaposed direction of the circuit breaker can be performed. By setting the dimensions in the juxtaposed direction substantially equal to each other, the movement in the juxtaposed direction can be regulated instead of the protrusions 9 and 10 that regulate the position of the side surface of the circuit breaker. In addition, it is good also as a structure controlled more firmly together with the protrusion parts 9 and 10. FIG.

Moreover, although the fitting part 8 demonstrated in the example formed by bending the edge part of the attachment board 2, it is good also as a hole corresponding to the magnitude | size of the latching | locking part 703, and the parallel arrangement direction of a hole and a latching | locking part is sufficient. By setting the dimensions substantially the same, the movement in the juxtaposed direction can be restricted instead of the protrusions 9 and 10 that restrict the position of the side surface of the circuit breaker. In addition, it is good also as a structure controlled more firmly together with the protrusion parts 9 and 10. FIG. Furthermore, although the circuit breaker has been described as an example in which the power supply side terminal is a plug-in structure, it can be implemented by a normal screw terminal, and these can be appropriately changed within the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Mounting plate 3 Claw part 4 Claw part 5 Concave part 6 Concave part 7 Lock lever 702 Finger hook part 703 Locking part 704 Surrounding part 8 Fitting part 9 Protruding part 10 Protruding part 11 12 Bus line 13 14 Plug-in terminal part 15 16 Plug-in terminal fitting 17 Protrusion 18 groove 19 groove

Claims (5)

As the structure of the circuit breaker and mounting plate for mounting the plug-in type circuit breaker provided with the plug-in terminal fitting on the mounting plate side provided with the bus bar such as the distribution board,
The circuit breaker is provided with a lock lever that can be selectively selected with an external knob, which protrudes from the bottom of the circuit breaker.
Provide the fitting part of the lock lever on the mounting plate side,
When the circuit breaker placed on the mounting plate is slid in the direction of the bus, the bus is inserted into the plug-in terminal fitting.
The lock lever protrudes from the bottom surface of the circuit breaker and is fitted to the fitting part on the mounting plate side, so that the movement in the direction of removing the circuit breaker from the busbar is regulated,
An attachment structure for a circuit breaker, characterized in that a surrounding portion is formed around the outer knob so as to avoid a movement locus of the outer knob.
2. The circuit breaker mounting structure according to claim 1, wherein a rib protruding in a direction of removing the circuit breaker from the bus bar is formed at least on a bottom surface side of the external knob as a part of the surrounding portion.
In a side view facing the circuit breaker from the parallel direction of the circuit breakers,
The circuit breaker mounting structure according to claim 1, wherein the external knob does not protrude outward from the surrounding portion.
In bottom view facing the circuit breaker from the mounting surface side of the circuit breaker,
The circuit breaker mounting structure according to claim 1, wherein the external knob does not protrude outward from the surrounding portion.
In side view and bottom view of the circuit breaker,
The circuit breaker mounting structure according to claim 1, wherein the external knob does not protrude outward from the surrounding portion.

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