JP5906487B2 - Branch switch - Google Patents

Description

The present invention relates to a branch switch as a circuit breaker incorporated in a distribution board, and more particularly to a branch switch having a mounting structure that can prevent forgetting to fix the branch switch to an insole as much as possible.

A distribution board in which a branch switch for supplying power to the electric circuit is arranged, the main switch inside the cabinet constituting the outer shell of the distribution board, and the bus connected to the secondary side of the main switch Incorporating an internal device such as a branch switch connected to the bus line, it is used as a circuit entry device in a house or the like. In the case of a house, the applied electric circuit is usually an AC 50 Hz or 60 Hz single-phase two-wire electric circuit (100 V), a single-phase three-wire electric circuit (100/200 V), or a DC electric circuit.

The cabinet generally has a box that forms a wall that covers the top, bottom, left, and right sides and the back of the distribution board, and a front side that faces the operation side of the internal device. And a cover provided on the front side of the box so as to cover. The operation unit of the internal device is configured to be opened in advance so as not to hinder the operation.

Internal devices such as circuit breakers such as main switches and branch switches incorporated in such distribution boards are used with the internal device main body attached to the bottom, and are fixed to the circuit breaker, or Attachment fixing release means for releasing the attachment is provided. FIG. 1 of Patent Document 1 shows a structure in which a circuit breaker is attached to and detached from a mounting plate that is an insole.

According to this structure, the circuit breaker is attached to and detached from the attachment plate as follows. The locking portion 703 of the lock lever 7 that is a means for fixing and releasing the attachment to the middle bottom of the circuit breaker 1 is set so as not to protrude from the bottom surface of the circuit breaker, and is blocked between the protrusions a9 and b10 of the mounting plate. It is placed on the mounting plate so that the device comes and the 4 claw portions b come to the opening of the recess portion 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 4 provided on the mounting plate. Engages with the recess 5 and the recess 6 of the circuit breaker, respectively. The lock lever 7 can be operated with the finger hook portion 702 selectively at the upper end portion and the lower end portion of the frame portion 701 so that the locking portion 703 protrudes or does not protrude from the bottom surface.

In this state, the circuit breaker is restricted from moving in the upward direction (vertical direction with respect to the mounting plate) in FIG. It can be removed in the load side 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 of the mounting plate. Thereby, the movement of the direction which removes a circuit breaker from a bus-bar can be controlled, and the circuit breaker 1 will be in the state where attachment to the attachment board 2 was completed.

When removing the circuit breaker 1 from the mounting plate 2, the finger hooking portion 702 of the lock lever 7 is pulled up with the finger in the direction opposite to the mounting plate, and the fitting portion 8 and the locking portion 703 of the lock lever 7 are fitted. Is released. 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.

In such a circuit breaker mounting structure, in order to mount the plug-in type circuit breaker 1 on the mounting plate 2 provided on the distribution board, a claw portion that restricts the movement in the direction perpendicular to the mounting plate 2 3 and the claw part 4 are provided on the mounting plate 2, and the concave part 5 and the concave part 6 respectively corresponding to the claw parts 3 and 4 are provided in the circuit breaker 1, and the circuit is interrupted from the buses 11 and 12 provided on the mounting plate 2. The circuit breaker 1 is provided with a lock lever 7 that restricts the movement in the direction in which the device 1 is removed, and the fitting plate 8 is provided with a fitting portion 8 into which the locking portion 703 of the lock lever 7 is fitted. The plug-in type circuit breaker can be mounted while sliding parallel to the mounting plate, and even when the electric wire is routed in the distribution board, the finger hook of the lock lever 7 is slightly from the load side surface of the circuit breaker. Since it only protrudes, there is no fear of damaging the wire coating. It is another object of the present invention to provide an attachment structure that does not require the use of a tool for removing the circuit breaker and does not require the carrying of the tool.

JP 2002-150911 A

Nowadays, efforts for product safety have become more important than ever. Circuit breakers and distribution boards that incorporate circuit breakers have the role of supplying electricity supplied by the power company to each branch circuit, while circuit breakers are a security that protects wiring from electrical accidents. In order to fully exhibit the functions for fulfilling these roles, it is assumed that the circuit breaker is used in a state where it is correctly attached to the distribution board.

Normally, when checking whether the branch switch is correctly attached to the mounting board of the distribution board, open the front cover that makes up the distribution board, and check the contact state between the branch switch and the bus bar. . In addition to visually confirming whether or not the branch switches are properly arranged, it is visually confirmed whether or not the above-described lock lever is properly pressed in the direction of the mounting plate.

However, since the lock lever is located near the middle bottom near the bottom of the branch switch and is located closer to the bottom than the wire insertion hole in the branch switch, when checking the pushed-down state of the lock lever, Prior to factory shipment, it was necessary to sequentially check the inside of the case where the mounting plate was placed on the distribution board, and it took time for the confirmation work.

In addition, at the site where the distribution board is installed, when confirming before wiring the wire to the branch switch, it is also visually checked by looking into the inside of the case, but again after wiring the wire If the cable is used, the wired wire will be a hindrance to visually confirm the push-down state of the lock lever, and the confirmation work will be performed while avoiding the wire. That is, when the circuit breaker is not used properly, it is necessary to access the lock lever after scraping the electric wires and push the lock lever down to the mounting plate. For this reason, it took time for the attachment confirmation work and the correction work.

If you forget to depress the lock lever when installing a branch switch or replacing it with one with a different rated voltage at a distribution board construction site, etc., the branch switch However, the branch switch is not released from the busbar and may be disconnected from the busbar. is there.

Confirmation work after replacement work is performed, but if the lock lever is not pushed down and the cable is connected to the load side terminal and started to use, the use and vibration over time As a result, the circuit breaker may be disconnected from or disconnected from the busbar, resulting in various electrical failures such as poor contact between the busbar and the terminal, abnormal heat generation at the terminal, and power failure. There is.

Therefore, the present invention has been made in view of the above problems, and by providing a sense of unity in the arrangement position on the front side of the operation branch switch that needs to be operated from the outside of the branch switch, It is an object of the present invention to provide a branch switch that prevents forgetting to perform a fixing operation of a lock lever that is a mounting / fixing release means in the branch switch when construction is performed or when the branch switch is replaced.

The distribution board according to the present invention is configured to solve the above-described problem, and is disposed inside a cabinet including a box having an opening at the front and a cover attached to the box and covering the front side of the box. A branch switch with an operation handle attached to the insole and externally turning on and off the electric circuit,
The branch switch is fixedly attached to the branch switch by being pushed down in the direction of the locking portion provided on the inner bottom, protruding from the bottom surface of the branch switch, and locked to the locking portion. On the other hand, there is provided a lock lever that is lifted in the opposite direction to the locking portion so that it does not protrude from the bottom surface of the branch switch and is released from the locking portion, and the locking lever is released. one height from the insole of the operating portion of the lock lever when locked to the locking portion is found provided substantially equal to the operating handle, when the locking of said locking portion is released The branch switch may be configured such that the height of the operation portion of the lock lever from the inner bottom protrudes to the front side of the cover and is located on the front side of the operation handle .

According to such a configuration, since the operation handle and the operation portion of the lock lever when viewed from the front side are provided at substantially the same height, when operating the operation handle, the user is in the presence of the lock lever. It is easy to notice, and before operating the handle, it is easy to call attention to whether or not the branch switch is normally attached, that is, whether the lock lever is in the attachment fixing position or not in the attachment fixing position.

Delete

As for the no lock lever mounted fixed position, by the operating portion of the lock lever on the front side of the operating handle projects, the mounting of the particular branch switch in comparison with the locking lever in the other branch switches Only the lock lever that is not in the fixed position will protrude to the front side. For this reason, when the branch switch is arranged on the distribution board, it is easy to grasp the difference in the height position of the lock lever from the front side, and it is easy to identify that the lock lever is not in the mounting and fixing position.

As described above, according to the present invention, the arrangement position on the front side of the operation branch switch that needs to be operated from the outside of the branch switch is made uniform, so that the distribution switchboard can be installed and the branch switch can be provided. If there is a branch switch that has forgotten to forget to do the fixing and fixing operation of the lock lever, which is the mounting and fixing release means in the branch switch, It is possible to provide a branch switch that can easily identify the corresponding branch switch.

The external appearance perspective view of the distribution board which shows embodiment of this invention is shown. The attachment figure of the branch switch to the insole in the distribution board is shown. The figure which looked at the branch switch from the side is shown. The figure which looked at the branch switch from the back side is shown. Sectional drawing of the principal part around the lock lever of a branch switch is shown. The figure which looked at the branch switch from the bottom side is shown. The general-view figure in the state by which the branch switch was arrange | positioned by the distribution board is shown.

Next, a preferred embodiment of the present invention will be described in detail with reference to a mounting structure of a branch switch attached to a residential distribution board.

(First embodiment)
The distribution board according to the first embodiment is shown in FIG. The distribution board 10 is used for a single-phase three-wire commercial electric circuit. Houses internal devices such as a current limiter, a main switch, a bus connected via a connecting member on the secondary side of the main switch, and a branch switch connected to the bus in the cabinet. These internal devices are attached to the insole and fixedly attached to the cabinet.

The cabinet 11 constitutes an outline of the distribution board 10. The cabinet 11 is attached and fixed to the inner bottom for attaching the internal device, and forms a wall that covers the top, bottom, left, and right side surfaces and the back surface of the distribution board, and the front side facing the operation surface side of the internal device. And a cover 212 provided on the front side of the box 211. In addition, a door is provided on the front side of the cover 212 so as to open and close with a hinge structure so as to cover the front surface of the cover 212 with the door 213 closed.

FIG. 2 is a diagram showing a circuit breaker 1 as a branch switch, an attachment unit 2 to which the circuit breaker 1 is attached, an internal unit including a bus bar for each phase, an insulating wall, and the like.

2 to 6, the power supply side terminal side of the circuit breaker 1 is the front side, the load side terminal side is the back side, the side where the operation handle 103 is provided is the front side, and the side attached to the mounting plate described later is the bottom side. A description will be given using.

The circuit breaker 1 is formed by casings 101 and 102 in which the outer shell of the main body is divided in the longitudinal direction. The circuit breaker 1 includes a power supply side connection terminal connected to a power supply, a contact connected to the power supply connection terminal, a contact open / close mechanism for opening / closing the contact, and a contact open / close mechanism when an abnormal current is generated. An automatic shut-off mechanism for turning on and off, a load side connection terminal for supplying power to the load side circuit, and the like are provided inside the case, and an operation handle 103 for turning on and off the contact opening / closing mechanism from the outside of the case Is provided on the front side. On the load side, wire insertion holes 105 and 106 are provided for connecting wires to the load side terminals. The power supply side connection terminal is configured by using a plug-in type terminal, and the load side connection terminal is configured by using a lock connection terminal. On the load side, a lock lever 104 is provided that is locked to a locking portion 206 provided on a mounting plate that is an insole.

The lock lever 104 is provided so that it can alternatively be selected from projecting from the bottom surface of the circuit breaker 1 by the external knob 1042, and is formed in a substantially rod shape that continues from the bottom surface side to the front surface side of the circuit breaker 1. Has been.

The mounting plate, which is an insole, is used to attach internal devices such as a circuit breaker and buses 201, 202, and 203 that supply power to the internal devices.

The mounting plate 2 has first restricting portions 204 and 205 that interact with the circuit breaker when the circuit breaker 1 is attached and restrict the movement of the circuit breaker in the insole direction from the front side to the bottom side. A second restricting portion 206 that restricts the movement in the direction from the front side to the back side is provided.

The first restricting portion 204 is formed by cutting and raising a part of the mounting plate 2, and the end portion is an engagement piece. On the circuit breaker 1 side, as shown in FIG. 2, the concave portion 107 in which the first restricting portion is fitted on the bottom surface of the circuit breaker 1 and the bottom surface side of the concave portion are provided to act on the engagement piece. A mating engagement piece 108 is provided. When the circuit breaker 1 is attached to the mounting plate 2, the engagement pieces engage with each other, thereby restricting the movement in the direction from the front side to the bottom side on the back side of the circuit breaker.

The first restricting portion 205 is formed to protrude from the mounting plate, and a recess (not shown) into which the protruding portion of the second restricting portion 205 formed on the front side of the circuit breaker 1 is fitted. Fit together. By engaging these protrusions and recesses, the movement in the direction from the front side to the bottom side is restricted on the front side of the circuit breaker. Since the movement in the direction from the front side to the bottom side is restricted on both the front side and the back side of the circuit breaker in this way, the circuit breaker can be more reliably fixed to the mounting plate.

Next, the second restricting portion 206 is formed by bending a part of the mounting plate 2 into a concave shape and forming a locking portion by the concave portion. On the back side of the circuit breaker 1, a lock lever 104 is provided which projects from the bottom surface of the circuit breaker 1 to selectively select whether or not by an external knob 1042, and protrudes from the bottom surface of the circuit breaker 1. The lock lever locking portion 1041 fits into the concave portion of the second restricting portion 206 and is engaged with each other, thereby restricting the movement of the circuit breaker in the front side-back side direction.

When the circuit breaker 1 is attached to the mounting plate 2, the circuit breaker 1 is slid in the direction of the bus on the mounting plate 2, so that the bus is inserted into the power supply side terminal and the first The circuit breaker 1 is placed at an appropriate position on the mounting plate 2 by engaging the restricting portions 204 and 205 with the engaging piece 108 of the circuit breaker 1 and the recess. Then, by pushing down the external knob 1042 of the lock lever 104 in the direction of the mounting plate 2, the locking portion 1041 of the lock lever protrudes from the bottom surface of the circuit breaker 1 and engages with the concave portion 206 of the mounting plate 2, Installation is complete.

When removing the circuit breaker 1 from the mounting plate 2, the external knob 1042 of the lock lever 104 is pulled up in the direction opposite to the mounting plate (front side of the circuit breaker 1), and the locking lever locking portion 1041 is removed from the bottom surface. By moving the circuit breaker 1 so as not to protrude and pulling the circuit breaker 1 back, the engagement between the first restricting portions 104 and 205 and the circuit breaker is released, and at the same time the connection between the bus bar and the connection terminal is released. The removal is completed.

Further, as shown in FIG. 3, the lock lever 104 is elastically formed so that the position of the lock lever 104 protruding from the bottom surface of the circuit breaker 1 and the position not to be determined are determined alternatively. Arm portions 1046 are formed, and climbing protrusions 1011 and 1021 that slide on the elastic arm portions are formed inside the casings 101 and 102 on the back surface-bottom surface side. When operating the lock lever external knob 1042 to push down the lock lever in the direction of the mounting plate / pull it up to the front side, the elastic arm portion is bent and rides over the overhanging protrusions 1011 and 1021, so that the position of the lock lever Is alternatively determined and the position is maintained.

Due to such a configuration, when the lock lever is pushed down in the direction of the mounting plate, after the end of the elastic arm portion 1046 gets over the top of the protrusions 1011 and 1021, a scissors are attached to a predetermined fixed position. Displace. Also, when the lock lever 104 is pulled up, after the end of the elastic arm portion 1046 has reached the top of the protrusions 1012, 1022, it is displaced to a predetermined release position.

Further, the locking portion 1041 of the lock lever is formed with a trapezoid climbing protrusion 1047 whose bottom surface is inclined with respect to the mounting plate. When the circuit breaker is to be placed on the mounting plate 2, for example, when the circuit breaker is slid in the direction of the bus bar while the lock lever 1041 is protruding from the bottom surface of the circuit breaker, the slope becomes the mounting plate. 2 is converted into a force for pushing the lock lever 104 to the front side, and the lock lever 104 is pushed to the front side. At this time, if the positional relationship is such that the elastic arm portion 1046 does not get over the overpass projections 1011, 1021, the circuit breaker 1 slides, and the lock lever 1041 is inserted into the recess fitting portion of the mounting plate 2. When there is a force, the force pushed up to the front side disappears, and the force that the elastic arm portion 1046 tries to return to the original protruding state works, and the locking portion 1041 of the lock lever protrudes from the bottom surface of the circuit breaker 1, Installation is completed without having to push down the knob.

A sliding portion is formed in the extending portion 1043 on the front side of the lock lever 104 by digging a part of the meat of the extending portion. The sliding portion serves as a guide.

The sliding portion is slidably supported on the inside of the support portion by cylindrical support portions 1012, 1022 provided on the housing.

The end 1044 of the lock lever 104 is provided so that the height from the bottom surface when the lock lever 104 is locked to the locking portion 206 is substantially the same as that of the operation handle 103. On the other hand, the height from the bottom surface when the lock lever 104 is not locked to the locking portion 206 is provided so as to protrude forward from the height of the operation handle 103.

The positional relationship between the cover 212 constituting the cabinet 11 and the lock lever 104 will be described. The cover 21 2 is provided with a hole through which the extended portion 1043 of the lock lever 104 passes in the same manner as the cover 212 is opened to avoid the operation handle 103 of the branch switch. More specifically, a hole through which the extension 1043 of the lock lever 104 passes is provided corresponding to the position of the lock lever 104 at the mounting position of each branch switch.

When the cover 21 2 is attached to the box 211, the end 1044 of the lock lever 104 passes through the hole and is exposed to the front side of the cover. That is, since the operation handle 103 of the branch switch and the end 1044 of the lock lever are provided at substantially the same height, the end 1044 of the lock lever can be viewed from the front side of the cover.

As shown in FIG. 7, when the lock lever 104 in a specific branch switch is in the disengagement position, the end of the lock lever protrudes 104c to the front side of the cover, so that the specific branch switch It can be visually confirmed that the lock lever at is not in the mounting and fixing position.

In such a case, when the lock lever end 1044 that is not in the mounting and fixing position is pressed from the front side of the cover 211, the lock lever 104 is configured to be slidable, so that the pressed force is transmitted to the extension portion. After the lock lever 104 starts to be displaced downward and the elastic arm portion 1046 is displaced until it gets over the top of the overhanging protrusions 1011 and 1021, it is bent and set at a predetermined mounting and fixing position. Is fixed.

In this way, when there is a branch switch with the lock lever 104 in the mounting release position, the branch switch can be easily visually recognized and identified from the outside of the cabinet even after the cover is closed. Even when the lock lever 104 is modified from the attachment release position to the attachment fixing position, the cover 211 can be easily removed by pressing the end of the lock lever from the front side of the cover without removing the cover 211 from the box 21. Mounting and fixing operations can be performed.

Even when the cover 212 is not attached, checking the lock lever state from the front side of the branch switch makes it easy to check the attachment state. By pressing the end 1044 of the lever 104, the mounting and fixing operation can be easily performed.

Next, when the circuit breaker 1 is attached to the attachment plate 2, it is attached in the following steps. The circuit breaker 1 is placed on the mounting plate 2 and is slid to the bus bar side, and the first restricting portions 204 and 205 and the engagement piece 108 are engaged (step 1). In this state, the mounting position of the circuit breaker is an appropriate position with respect to the mounting plate.

Subsequently, the external knob 1042 of the lock lever 1041 or the extending portion 1043 of the lock lever 104 is pushed down toward the mounting plate, and the lock lever 1041 is protruded from the bottom surface (step 2). As described above, the attachment of the circuit breaker to the attachment plate is completed.

If a plurality of circuit breakers 1 are arranged side by side on the mounting plate 1, if there is something that has been installed in the same way as in step 1, it is necessary to check it before shipping or during construction. By performing visual confirmation from the front side of the cover of the board, it can be easily recognized that there is a circuit breaker that is not properly attached because the lock lever 104 extends to the front side. That is, when the display unit 1044 protrudes to the outer front side of the cover 212, it can be easily recognized that the lock lever is not pushed down.

On the other hand, when the lock lever is pushed down in order to perform step 2, the force can be transmitted to the lock lever 104 by pushing the end 1044 of the lock lever, and the lock lever can be pushed down. it can. In particular, after completing the on-site wiring work, if there is something that has been installed in step 1 without having to scrape the wiring, it is not necessary to push down the external knob 1042 of the lock lever 104. In addition to ensuring safety, improvement in convenience during construction can be expected.

In addition, in embodiment, although the form of the branch switch applied to the distribution board used for a single phase three-wire electric circuit was shown, the distribution board used for a single phase two-wire electric circuit, or a direct current circuit You may apply the structure which can prevent the attachment fixation fixation in this invention as much as possible to the branch switch provided with the operation handle and lock lever which are attached to the bottom of the distribution board used.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 101 Case 102 Case 103 Operation handle 1011 Passing protrusion 1021 Passing protrusion 1012 Supporting part 1022 Supporting part 104 Lock lever 1041 Locking lever locking part 1042 External knob 1043 Extension part 1044 End part 1046 Elastic arm part 1047 Trapezoid climbing protrusion 105 Electric wire insertion hole 106 Electric wire insertion hole 107 Recess 108 Engagement part 2 Mounting plate 201 Bus line 202 Bus line 203 Bus line 204 First restriction part 205 First restriction part 206 Second restriction part 10 Distribution board 11 Cabinet 211 Cover 212 Box 213 Door 2121 Hole

Claims (1)

A branch switch having an operation handle that is attached to an inner bottom disposed inside the cabinet and that is turned on and off from the outside, and includes a box that is open at the front and a cover that is attached to the box and covers the front side of the box. Because
The branch switch is fixedly attached to the branch switch by being pushed down in the direction of the locking portion provided on the inner bottom, protruding from the bottom surface of the branch switch, and locked to the locking portion. On the other hand, there is provided a lock lever that is lifted in the opposite direction to the locking portion so that it does not protrude from the bottom surface of the branch switch and is released from the locking portion by releasing the locking,
While the lock lever is height from the insole of the operating portion of the lock lever when locked to the locking portion is found provided substantially equal to the operating handle, the engagement between the locking portion A branching switch according to claim 1 , wherein the height of the operation portion of the lock lever when released from the insole protrudes to the front side of the cover and is located on the front side of the operation handle .

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