JP6270188B2 - Circuit breaker removal structure - Google Patents

Description

  The present invention relates to a structure for removing a circuit breaker from a bus bar of a distribution board. In particular, the present invention relates to a structure for easily removing a branch circuit breaker connected to the bus bar in a plug-in manner from a state of being electrically connected to the bus bar.

The distribution board incorporates a circuit breaker such as a main switch, a bus connected to the secondary side of the main switch, and a branch circuit breaker connected to each of the buses in the cabinet, and draws in an electric circuit. Used as a mouth device. In residential distribution boards for homes, etc., a plurality of branch circuit breakers are arranged in parallel on the secondary side of the main switch, and an AC 50 Hz or 60 Hz single-phase two-wire circuit (100 V), or a single-phase three-wire system. In general, an electric circuit (100 / 200V) is applied.

In recent years, an increasing number of residential distribution boards are configured by connecting a plug-in type branch circuit breaker to a bus. In such a distribution board, a plug-in type branch circuit breaker placed on the mounting plate is directed in the direction of the bus with respect to the bus provided on the mounting plate arranged inside the cabinet. As the bus is inserted into the plug-in terminal fitting, the connection state is established.On the other hand, when the branch circuit breaker is pulled out in the direction away from the bus, the bus is removed from the plug-in terminal fitting. It is pulled out and is in a removed state.

When removing the branch circuit breakers arranged in parallel in the distribution board from the busbars, it is necessary to manually pull the branch circuit breaker away from the busbars. There is a device disclosed in Patent Documents 1 to 3.

The device for removing the breaker from the main bar of the distribution board disclosed in Patent Document 1

The operating member (53) is pivotally attached to the support member (52) disclosed in Patent Documents 2 and 3, and the protrusion (56) of the breaker (55) is engaged with the locking portion (54) of the operating member (53). For a configuration in which the operation member (53) is rotated, the contact (58) of the breaker (55) is pushed out from the main bar (59) by the pushing portion (57), The locking portion 54, the pushing portion 57, and the shaft portion 60 of the operation member 53 are easily damaged early, and when a plurality of narrow breakers 55 are arranged, the interval between the operation members 53 is narrowed and rotated. This is an invention made in view of the problem that it becomes difficult, the same number of operation members 53 as the breakers 55 are required, the number of parts and the number of assembling steps increase, and the manufacturing cost of the detachment device 51 increases. The device for removing the breaker from the main bar of the distribution board disclosed in Patent Document 1 is composed of a flexible insulating material such as synthetic resin or rubber, so that an effect such as being difficult to break can be expected. It is.

JP 2010-226881 A JP 2004-147375 A JP 2004-147376 A

The device for removing the breaker is formed on the back side of the insertion hole (18) when the operation member D is pushed into the back side of the insertion hole (18) formed in the block (12 of Patent Document 1). Since the operating member D is engaged with the engaging portion (19) and the flexible portion (17) is deformed to the outside of the block, the operating member D forms a guide wall forming a part of the insertion hole (18). While being pushed along (20), the flexible portion (17) acts on the breaker by being pushed outward according to the thickness of the operation member D.

For this reason, the operation member D is required to be thick enough to push the breaker 4 out of the main bar 6, and it is difficult to remove the operation member D when the operator does not have a driver as the operation member D suitable for use. Is expected. In addition, if the thickness of the driver used for the work is different, the amount of deformation of the flexible portion (17) to the outside with respect to the insertion amount becomes unclear, and if a thin screwdriver is used for the insertion hole, the guide wall 20 side This necessitates an operation that requires a driver to lie down and makes the operation complicated. Further, the flexible portion (17) is interposed between the opposing primary side end faces 4a of the upper and lower branch breakers, and it is difficult to visually confirm the movement of the flexible portion (17) deforming outward. Therefore, there is a possibility that the operator's feeling of operation is reduced. In addition, since the shape of the engagement portion at the back of the insertion hole (18) is determined in accordance with the shape of the tip portion of the driver D, the length in the insertion direction of the block (12) is necessary, and the front side from the bus bar The size of the direction increases.

Therefore, the present invention has been made in view of the above problems, and the detachment structure is not easily damaged, the operation is easy for an operator, and can be manufactured at a low cost, and the operation member to be used is not limited, and is compact. An object of the present invention is to provide a circuit breaker removal structure.

The circuit breaker detaching structure according to the present invention is configured to solve the above-mentioned problems, and the circuit breaker detaching structure according to claim 1 is such that the circuit breaker is in the longitudinal direction of both ends of the bus. On the other hand, in a distribution board connected in parallel from both sides in the short width direction, a circuit for removing the plug-in type circuit breaker provided with plug-in terminal fittings from the state connected to the bus of the distribution board A circuit breaker detachment structure, wherein the side close to the bus bar of the vessel body constituting the outline of the circuit breaker is the power supply terminal side, the side away from the bus bar is the load terminal side, and the operation unit provided in the vessel body When the front side is the front side and the mounting surface side to the mounting plate on which the bus bar is provided is the bottom side, the front side of the bus bar is formed so that the central part rises in a mountain shape in the direction from the bottom side to the front side. The elastic piece is fixed to one end of the elastic piece. With the other end as a free end, an operating portion for directly pressing the elastic piece from the front side is formed near the top on the front side of the elastic piece, and disposed on the front side of the bus bar. It is integrally formed on the busbar cover for insulation, and further, the central part of the angle-shaped elastic piece is arranged so as to be biased toward the power supply terminal side of the circuit breaker, so that the operation part of the adjacent elastic piece has the power supply terminal side. In the bus cover, the biasing direction is formed in opposite directions to the short side direction of the busbar, and the free end is opposed to the power supply terminal side of the device body so as to face the side wall on the power supply terminal side. A deflection preventing means is provided around the elastic piece so as to stand substantially the same height as the front side of the elastic piece, and the central part of the elastic piece is pressed from the front side to the bottom side. And the free end is a circuit while the elastic piece is bent. The circuit breaker is pushed in the direction away from the busbar by moving in the direction of the circuit breaker and the free end abuts against the side wall on the power supply terminal side of the circuit breaker, and the circuit breaker is removed from the busbar. It is characterized by.

According to such a configuration, by pressing the central portion of the elastic piece formed so that the central portion rises in a mountain shape, the mountain shape is bent in the direction of collapse, and the free end is pressed against the side wall on the power supply terminal side of the circuit breaker. Therefore, the pressing force from the front side to the bottom side is changed to a direction in which the circuit breaker is removed from the bus bar, and the circuit breaker is pushed out in a direction away from the bus bar. A circuit breaker mounting structure can be provided with a simple configuration and easy operation.

In addition, when removing the circuit breaker, the operator can easily grasp and remove the circuit breaker to be removed by pressing the operation unit as a guide, and the removal work is facilitated. . Moreover, if the operation part can be pressed, the thickness of the driver etc. as an operation member will not be limited.

Further, the work of removing the circuit breaker performed in the vicinity of the bus as the charging unit can be performed in a state where the work is insulated by the bus cover while maintaining the safety of the work. Moreover, since it is integrally formed with the bus cover, a separate member for providing a detaching structure can be eliminated.

In addition, since each operation unit is provided at a position that is biased toward the circuit breaker to be operated, the circuit breaker to be removed must be clearly distinguished from the non-target circuit breaker. Can do.

As described above, according to the present invention, the detachment structure is not easily damaged, and the detachment can be performed by pressing the pressing member from the front side to the bottom side, and the displacement in the push-down direction and the circuit breaker removal direction are performed. The circuit breaker removal structure can be provided in a compact manner without limiting the operation member to be used, as well as being easy to manufacture and inexpensive to manufacture. .

The internal unit unit perspective view in the distribution board for houses which shows 1st Embodiment is shown. The perspective view when attaching a branch circuit breaker to the internal unit which concerns on the embodiment is shown. The perspective view of the branch circuit breaker concerning the embodiment is shown. The perspective view when the branch circuit breaker concerning the embodiment is attached is shown. The principal part enlarged view of the removal structure part of the circuit breaker concerning the embodiment is shown. The circuit breaker in a prior art example is shown. The circuit breaker in a prior art example is shown.

Next, an embodiment of the present invention will be described in detail with reference to FIGS.

(Description of internal unit)
The circuit breaker detaching structure includes a mounting plate that is mounted and fixed inside the cabinet of a residential distribution board, a bus bar fixing base provided on the mounting plate, a bus bar of each pole that is mounted on the bus bar fixing base, and a bus bar. The branch circuit breaker 1 to be connected and the bus cover 2 disposed on the front side of the bus to insulate the bus from the outside are provided in the internal unit 100 that is integrated.

Thereafter, the side close to the bus of the vessel constituting the outline of the branch circuit breaker is the power supply terminal side, the side away from the bus is the load terminal side, the side of the operation unit provided in the vessel is the front side, A description will be given by assuming that the mounting surface side to the mounting plate provided with the bus bar is the bottom surface side, and the direction in which these branch circuit breakers are arranged in parallel is the width direction of the body.

The internal unit 100 includes a lower mounting plate 3 that is attached to the cabinet, and an upper mounting plate 4 that is placed on the lower mounting plate 3 and attaches an internal device to the front side, thereby forming a base.

The lower mounting plate 3 is formed by bending a metal plate, and the upper mounting plate 4 is formed by resin molding. The mounting of the lower mounting plate 3 and the upper mounting plate 4 is performed by fitting a protruding portion provided at a position corresponding to the mounting hole in the upper mounting plate into a mounting hole provided in the lower mounting plate 3. Done.

On the upper mounting plate 4, a bus fixing base 41 is erected in a substantially central portion in the width direction of the body of the branch circuit breaker 1, that is, in the parallel direction of the branch circuit breaker 1. The bus bars (5a to 5c) of each pole are held in a state where insulation is maintained over the longitudinal direction of both ends of the bus bar. In addition, in the longitudinal direction of both ends of the bus bar in the upper mounting plate 4, the branch circuit breakers 1 are placed side by side on both sides of the bus bar, and the branch circuit breakers placed side by side from the bus bar. A branch line for supplying power toward each of the 1 is formed to project at the mounting position of the branch circuit breaker 1.

The upper mounting plate 4 is formed with a mounting portion 42 for mounting the branch circuit breakers 1 arranged side by side. The mounting portion 42 is formed so as to protrude substantially in the same direction as the width of the branch circuit breaker 1 in the power supply side-load side direction of the branch circuit breaker 1 and prevents the fluctuation in the width direction. Part 43;

A hooking portion 44 that protrudes from the central portion of the guide portion 43 in a direction away from the bus bar and engages with a concave portion provided on the bottom surface side of the branch circuit breaker 1 to prevent the mounting surface side-front surface from lifting. Is formed.

(About branch circuit breaker)
The branch circuit breaker 1 mounted on the mounting part 42 has a power source side-load side in the longitudinal direction of the body constituting the outer shell, and a plug-in terminal connected to the bus on the power source side. A metal fitting is provided, and a quick connection terminal metal fitting to which an electric wire from a load circuit is connected is provided on the load side, and an electric circuit is formed between the power supply side terminal and the load side terminal via an opening / closing mechanism. The opening / closing mechanism can be opened / closed by operating the operation unit 13 linked to the opening / closing mechanism from the outside of the body of the branch circuit breaker.

On the load terminal side of the branch circuit breaker 1, a lock lever 16 that engages with the lower mounting plate 3 is provided to prevent the branch circuit breaker 1 from moving in a direction away from the bus bar. The lock lever 1 is provided inside the branch circuit breaker 1 so as to be slidable in the direction from the front side to the bottom side. The lock lever 1 selectively takes on a state in which the lock lever 1 protrudes toward the bottom side of the case and a state in which it does not protrude. It can be operated by holding the finger hook portion 161 so as to obtain it. At each position, an engaging portion for engaging the device of the branch circuit breaker and the lock lever is provided so that the projecting state and the non-projecting state can be stably maintained. When the branch circuit breaker is attached to the inner unit, the lock lever 16 protrudes from the bottom surface side and engages with the end of the lower mounting plate 3 so that the branch circuit breaker 1 moves away from the bus. Is regulated.

Two plug-in terminals 11 are provided on the power supply side of the branch circuit breaker 1, and power is supplied by being connected to any two of the buses (5a to 5c) of each pole. . For the buses (5a to 5c) of the respective poles held on the bus bar fixing stand 41 erected from the upper mounting plate 3, branch lines (5a1, 5b1 in FIG. 3) extending from the bus to the branch circuit breaker side. 5c1), one branch line 5a1 is arranged on the side closer to the upper mounting plate 4 from the bottom side to the front side, and two buses 5b1 and 5c1 are located on the front side of the bus 5a1. Are arranged in the width direction of the branch circuit breaker at the same height. The branch circuit breaker 1 is connected to 5a1 and 5b1 or 5a1 and 5c1 among these branch lines and supplied with power. Specifically, in FIG. 3, 5a1 and 5b1 are first and second voltage electrodes (L1, L2), 5c1 is a neutral electrode (N), and buses are arranged, and the branch circuit breaker 1 is When connected to the branch lines 5a1 and 5b1, a voltage of 200V is supplied, and when the branch circuit breaker 1 is connected to 5a1 and 5c1, 100V is supplied.

(About the busbar cover)
On the front side of the bus bar fixing base 41, a bus bar cover 2 that covers the bus bar is disposed. The bus cover 2 is a resin cover formed on a substantially flat plate, and is used as an insulating means for preventing direct contact from the front side of the cabinet to the bus that is a charging unit. The bus bar cover 2 is formed along the longitudinal direction of both ends of the bus bar, and is fixed to the bus bar fixing base by being screwed into a screw hole provided on the bus bar with a fixing screw 23. In addition, at the end, a plurality of hooks 411 provided on the bus bar fixing base side and the hooks provided on the bus bar cover 2 are arranged so that the bus bar cover does not come off at once when the fixing screw is removed. The engagement hole 22 is engaged.

A recess 24 is formed in the bus cover 2 along the longitudinal direction of both ends of the bus. The recess 24 is provided with the screw hole and is screwed to the bus bar, and the wall portion of the recess engages with the edge of the bus bar fixing base 41 holding the bus bar, so that the bus bar cover 2 is connected to the bus bar. It is possible to prevent the branch circuit breaker in the direction orthogonal to the longitudinal direction at both ends from being displaced in the direction of attaching and removing.

(Removal structure of circuit breaker)
In the longitudinal direction of both ends of the bus bar in the bus bar cover 2, the bus bar cover is provided in a state in which circuit breaker removing devices are juxtaposed corresponding to the respective branch circuit breakers 1 mounted on the upper mounting plate 4. 2 is integrally formed.

In the removing device, the side walls (17a, 17b) on the side of the power supply terminal of the circuit breaker body arranged opposite to each other across the bus in the width direction of the short side with respect to the longitudinal direction of both ends of the bus It is arranged between. In more detail, on the front side of the bus bar, the elastic piece 21 formed so that the central portion rises in a mountain shape from the bottom side to the front side is used as one end side of the elastic piece 21 as a fixed end 21b and the other end. The free end 21a is disposed so that the fixed end 21b faces the side wall 17b on the power supply terminal side of one circuit breaker, and the free end 21a sandwiches the bus bar and the side wall 17a on the power supply terminal side of the other circuit breaker It arranges so that it may face.

In addition, the elastic piece 21 is approximately the size in the width direction of the device body of the circuit breaker 1 that is arranged in parallel with the bus bar in the width direction of the short side with respect to the longitudinal direction of both ends of the bus bar. The elastic pieces 21 are arranged in parallel along the longitudinal direction of the bus bar. The number of juxtaposed arrangements is set to a number that satisfies the number of branch circuit breakers so that a removal device can be provided for each branch circuit breaker. A spare may be provided assuming an additional branch circuit breaker. In this way, it can be formed compact when integrally formed on the busbar cover.

An operation portion 213 for pressing the elastic piece 21 from the front side is formed near the top on the front side of the elastic piece 21. The operation portion 213 is configured by forming a recess in the surface near the top of the elastic piece 21. Since the dent is such that the tip of a screwdriver used as an electric tool is engaged, the elastic piece 21 is pushed down by pressing it with a normal electric tool carried by an electrician. Is possible. Further, since the depression can be pushed down by the engagement of the tip portion of the electric tool, the thickness of the driver used for the operation can be allowed to some extent.

Further, the detaching devices arranged side by side are alternately arranged on the circuit breaker side to be removed. That is, they are arranged so as to be deviated from the center in the width direction of the bus bar on the circuit breaker side to be removed. This is because the operator can clearly grasp which circuit breaker is to be removed by the detaching device among the circuit breakers arranged in parallel.

More specifically, the fixed end, the operation portion, and the free end of each detachment device are offset from the central portion in the width direction of the bus bar toward the power supply terminal side of the circuit breaker to be removed. With this arrangement, it is possible to clearly grasp that the removal work is performed using the removal device close to the power supply terminal side of the circuit breaker, and the possibility of erroneously operating the branch circuit breaker that is not the object of operation is reduced.

(Installation of branch circuit breaker)
In operating such a circuit breaker detachment structure, first, the case where the branch circuit breaker 1 is attached to the internal unit will be described. First, in FIG. 2 and FIG. 3, the lock lever 16 of the branch circuit breaker 1 is set so as not to protrude from the bottom surface side of the branch circuit breaker, and the branch circuit breaker 1 is placed between the guide portions 43 of the upper mounting plate 4. Placed on. In this state, fluctuations in the width direction of the branch circuit breaker are suppressed to some extent.

Subsequently, when the branch circuit breaker is slid along the guide portion 43 in the direction of the bus, the hook portion 44 of the upper mounting plate 4 is engaged with the hooked portion 16 provided on the bottom side of the branch circuit breaker. The movement of the branch circuit breaker in the bottom side-front direction is suppressed. When the sliding is further performed, the plug-in terminals 11a and 11b on the power source side are inserted into the branch lines 5a1 and 5b1 of the bus, and the electrical connection between the bus and the plug-in terminal is completed.

Then, the finger hooking portion 161 of the lock lever 16 is pressed in the direction of the upper mounting plate, that is, in the direction of the bottom surface, so that the engaging portion of the lock lever protrudes from the bottom surface side, and the branch circuit breaker is detached from the bus. The movement of attaching the branch circuit breaker to the internal unit is completed. (Fig. 4)

(Removal of branch circuit breaker)
Next, the case where the branch circuit breaker 1 is removed from the internal unit by operating the circuit breaker removal structure will be described. First, the finger hooking portion 161 of the lock lever 16 is pulled up to the front side, and the engagement between the lock lever 16 and the lower mounting plate 3 is released. When the engagement between the lock lever 16 and the lower mounting plate 3 is released, the restriction that the branch circuit breaker 1 moves away from the busbar is released. In this state, the restriction in the direction in which the branch circuit breaker 1 moves away from the bus is maintained by the force with which the plug-in terminal 11 pinches the bus.

Subsequently, the operation part 213 of the elastic piece 21 is pressed from the front side to the bottom side. When the pressing force overcomes the bending force in the front side-bottom side direction of the elastic piece 21 formed in a mountain shape, the elastic piece 21 starts to change elastically in the bottom side direction, and the elastic piece 21 has a fixed end 21b. The free end 21a gradually moves toward the power supply terminal side of the branch circuit breaker as a base point, and the free end 21a contacts the side wall on the power supply terminal side of the branch circuit breaker.

When the operation unit 213 is further pressed from this state, the free end 21a presses the side wall in the direction of removing the circuit breaker from the bus bar, and finally the plug-in terminal 11 resists the force of pinching the bus bar. Start to displace the branch circuit breaker 1 in the direction away from the bus. When the displacement of the branch circuit breaker 1 exceeds the amount of insertion between the branch lines 5a1, 5b1 of the bus and the plug-in terminals 11a, 11b, the plug-in terminals 11a, 11b to the branch lines 5a1, 5b1 of the bus And the electrical connection between the busbar and the branch circuit breaker is released.

In this state, the branch circuit breaker 1 is no longer restricted in the direction away from the bus, and the branch circuit breaker 1 is removed from the bus by pulling the branch circuit breaker 1 lightly away from the bus. Removed from.

The shape of the chevron in the elastic piece 21 is such that when the operation part is pressed and the chevron is deformed, the amount of displacement of the free end 21a is the branch line 5a1 of the bus bar of the plug-in terminal 11 in the branch circuit breaker 1. , 5b1 may be configured to be larger than the insertion amount. In the present embodiment, the angle at which the elevation angle of the chevron is approximately 45 degrees so that the amount of displacement from the front side to the bottom side and the amount of displacement in the direction in which the branch circuit breaker moves away from the bus line is approximately 1: 1. It has a structure.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the bus cover 2, it is good to comprise a peripheral rib upright around the removal apparatus comprised with the elastic piece 21. FIG. The peripheral rib has a height in the front side-bottom side direction that is substantially the same as the height of the top of the angle-shaped elastic piece 21 on the front side, and from the tip of a driver tool such as the belly of a finger. The operation part 213 of the elastic piece 21 is configured to be less likely to be accidentally pressed by a wide range. Moreover, the secondary effect which can improve the bending strength of the longitudinal direction of a bus-bar 2 of a bus-bar cover 2 and a transversal direction by providing a rib in a front side-bottom face side direction is acquired. When pressing the elastic piece 21, it is necessary to press the pressing member 21 against the insertion force of the bus bar by the plug-in terminal of the branch circuit breaker 1, but the bending of the bus bar cover 2 at this time is reduced. be able to.

Further, the bus cover 2 may be configured to have a function of measuring a voltage supplied to the branch circuit breaker.

When a measurer performs voltage measurement, the measurer performs measurement using a voltage measuring instrument. The voltage measuring instrument uses a voltmeter or the like, but usually has a measuring terminal (test lead). The voltage supplied to the branch circuit breaker can be measured by connecting the test lead to the pole to which the branch circuit breaker is connected (L1 pole and L2 pole, or L1 station 1 and N pole).

The plug-in terminal 11b of the branch circuit breaker is selectively connected to 5b1 (L2 pole) or 5c1 (N pole) of the branch lines of the bus, and the plug-in terminal 11a is connected to the branch line 5a1 of the bus. Therefore, the voltage supplied to the branch circuit breaker can be measured by measuring the voltage between these plug-in terminals.

Two holes 252 corresponding to one branch circuit breaker are formed in the direction away from the bus bar of the detachment device as a measurement portion that leads to one pole for connecting the test leads. The hole 252 is provided on the front side of the plug-in terminal 11b on the power supply terminal side of the branch circuit breaker 1, and a measurement terminal (test lead) is inserted into the plug-in terminal part from the front side. The diameter of the hole is such that it can be contacted.

These two formed holes correspond to the branch lines (5b1 and 5c1) of the buses to which the branch circuit breaker 1 is selectively connected, and are only on the front side of the holes on the side of the connected branch lines. The test lead can be inserted into the plug-in terminal.

As the measurement part that leads to the other pole for connecting the test leads, the branch circuit breakers arranged in parallel on one side of the bus in the longitudinal direction of both ends of the bus are connected to the common bus, so these branch circuits A common measurement terminal for the circuit breaker may be provided in the vicinity of the extension of the bus bar in the longitudinal direction. The common measurement terminal is provided on the bottom side of the common voltage measurement terminal insertion hole indicated by 253 formed in the bus cover 2 in FIG.

The bag-shaped hole 251 and the common voltage measurement terminal insertion hole 253 are formed symmetrically in the longitudinal direction of both ends of the bus. When the measurer performs voltage measurement, one test lead is inserted into the common voltage measurement terminal insertion hole 253 and the test lead is brought into contact with the common voltage measurement terminal for the branch circuit breaker on one side in the longitudinal direction of both ends of the bus. In this state, the other test lead is inserted into the hole 252 on the side where the plug-in terminal 11b is located in each branch circuit breaker and brought into contact with the plug-in terminal 11b, and the voltage supplied to the corresponding branch circuit breaker Measure.

Further, in the direction away from the peripheral rib bus, the voltage display confirmation hole 26 extends across the width direction of the branch circuit breaker so that the voltage display (100 V or 200 V) in the branch circuit breaker 1 can be seen from the front side. Is provided. In the figure, any voltage that can be taken by each branch circuit breaker is shown. However, when the branch circuit breaker is actually used, only one of the voltage displays according to the arrangement position of the plug-in terminal ( 100V or 200V) can be visually recognized from the front side, and therefore the voltage display visible from the voltage display confirmation hole of the bus cover 2 is only one voltage display.

At the time of voltage measurement, since the value of the voltage to be supplied is displayed from the voltage display confirmation hole 26, the voltage value is compared with the voltage value measured by the voltage measuring instrument. It is possible to easily grasp whether the connection state of the branch circuit breaker is appropriate.

In this way, in addition to the circuit breaker removal structure, the bus cover 2 has both a voltage measurement function and a voltage display function, thereby providing a distribution board equipped with a more excellent bus cover for electrical safety. It becomes possible to do.

DESCRIPTION OF SYMBOLS 100 Internal unit 1 Branch circuit breaker 11 Power supply side plug-in terminal 12 Load terminal 13 Front side 14 Bottom side 16 Lock lever 2 Busbar cover 21 Elastic piece 213 Operation part 22 Hole part 23 Fixing screw 3 Lower mounting plate 4 Upper mounting plate 411 Hook 41 Busbar fixing base 42 Placement part 43 Guide part 44 Hooking part

Claims (1)

In a distribution board where circuit breakers are connected in parallel from both sides in the short width direction with respect to the longitudinal direction of both ends of the bus,
A circuit breaker removal structure for removing a plug-in type circuit breaker provided with a plug-in terminal fitting from a state connected to the busbar of the distribution board,
The side close to the bus of the vessel constituting the outline of the circuit breaker is the power supply terminal side, the side away from the bus is the load terminal side, the side of the operation section provided in the vessel is the front side, and the bus is When the mounting surface side to the provided mounting plate is the bottom side,
On the front side of the busbar, an elastic piece formed in a shape in which the central part rises in a mountain shape from the bottom side to the front side,
With one end of the elastic piece as a fixed end and the other end as a free end,
An operation portion for directly pressing the elastic piece from the front side is formed in the vicinity of the top of the elastic piece from the front side, and is integrated with a bus cover that is disposed on the front side of the bus bar and is insulated from the bus bar. Forming,
Furthermore, by arranging the central portions of the angle-shaped elastic pieces so as to be biased toward the power supply terminal side of the circuit breaker, the direction in which the operation portions of the adjacent elastic pieces are biased toward the power supply terminal side is the short direction of the bus Formed in opposite directions,
While the free end is opposed to the power supply terminal side of the container body so as to face the side wall on the power supply terminal side,
Providing an erroneous operation prevention means formed by standing around the elastic piece in the bus bar cover at substantially the same height as the front side of the elastic piece,
When the central part of the elastic piece is pressed from the front side to the bottom side,
The free end moves in the direction of the circuit breaker while the elastic piece is bent,
By contacting the free end with the side wall on the power supply terminal side of the circuit breaker,
The circuit breaker is pushed away from the busbar,
A circuit breaker removal structure, wherein the circuit breaker is removed from the busbar.

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