JP2586659B2 - Interlock device for circuit breaker auxiliary circuit connector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlock device for restricting attachment / detachment of a connector for connecting / disconnecting an auxiliary control circuit for operation control of a circuit breaker housed / extracted to a switchboard.

[Conventional technology]

A connector for connecting and disconnecting an auxiliary circuit for operation control of this type of circuit breaker is conventionally configured as shown in a side view of FIG. FIG. 11 is a side view showing the circuit breaker 2 housed and pulled out of the switchboard 1, and a circuit breaker 2a drawn out of the switchboard 1 and located at a disconnection position indicated by a two-dot chain line on the left side of the figure is indicated by a solid line. Shown is the circuit breaker 2 in the operating position. The circuit breaker 2a at the disconnection position is indicated by an arrow on the bottom plate 1a of the switchboard 1 with wheels 3.
The main circuit disconnecting portion 32 is connected in the operation position of the circuit breaker 2 indicated by the solid line in the direction 30. Circuit breaker 2 is the arrow in the opposite direction
When it is moved in the 34 direction, it is pulled out and becomes the disconnection position of the circuit breaker 2a. A first connector 4 and a second connector 6 shown in a dashed-dotted circle F below the front surface (the left surface in the figure) of the circuit breaker 2.
Is provided. By attaching and detaching the connecting device 8, the circuit breaker auxiliary circuit can be electrically and mechanically connected and separated, and serves as a disconnection portion of the auxiliary circuit. In the case of the manual connection type according to the present invention, in the state of the circuit breaker 2a at the disconnecting position, the second connector 6 on the switchboard side is inserted into the first connector 4 on the circuit breaker side, and the connector 8 is mounted. After that, the circuit breaker 2 is moved to the operating position, the main circuit disconnecting section 32 is connected, and the circuit breaker 2 is connected to the switchboard 1 side and is operated and controlled by the auxiliary circuit to operate.

[Problems to be solved by the invention]

In the conventional device, an interlock device for restricting attachment / detachment of the connector 8 is not provided. Therefore, even when the circuit breaker 2 is in the operating position, the connection device 8 can be attached and detached. Therefore, if the circuit breaker 2 is used in the operation position with the connection device 8 removed, external operation control of electric operation is performed. There is a problem that the command does not enter the circuit breaker 2 and the circuit breaker 2 does not perform a desired operation.

An object of the present invention is to provide an interlock device which solves the problem of the conventional example by restricting the attachment / detachment of the connector 8.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides, as a first means, a first connector provided on a front surface of the circuit breaker for connecting and disconnecting an auxiliary circuit for operation control of the circuit breaker housed and pulled out of a switchboard. An interlock device for restricting attachment / detachment of a connector comprising a second connector provided on the switchboard side, comprising: a support protruding from a front surface of the circuit breaker and provided near a lower portion of the first connector; A first arm which is formed in a Y-shape with the arms of
An interlock lever rotatably supported by a support shaft mounted on the support in the vicinity of the distal end thereof, and an interlock lever biasing the distal end of the first arm of the first arm of the interlock lever upward from the support shaft. A biasing mechanism for rotating the lock lever, a stopper for locking the rotation of the interlock lever by the biasing mechanism, and slidably supported by an elongated hole provided in the support and slid by the biasing force of the biasing mechanism. A lock pin which is located at a forward position and which engages with the tip of the first arm of the interlock lever to lock the rotation of the interlock lever; and a rotation pin which rotates downward at the tip of the second arm of the interlock lever. A roller arbitrarily provided to engage with an upper surface of a lock plate provided on a bottom plate of the switchboard, and a roller approaching the front surface of the second connector when the roller is engaged with the upper surface of the lock plate. A third arm of the interlock lever for locking the removal of the second connector, and an operation in which the lock pin is moved by the engagement of the lock pin mounted below the second connector. And a plate.

Further, as a second means, the present invention provides a first connector provided on the front surface of the circuit breaker for connecting and disconnecting an auxiliary circuit for operation control of the circuit breaker housed and pulled out of the switchboard, and a second connector provided on the switchboard side. An interlock device for restricting attachment / detachment of a connector which is composed of two connectors and is locked by a lock claw and a lock lever. A bracket, a lock pin supported at the end of the bracket movably in the vertical direction, a tension spring that constantly urges the lock pin downward, and a lock spring provided on the bottom plate of the switchboard and abutting thereon. A chain pin is rotatably supported by a locking plate driven against the urging force of the tension spring and a fulcrum shaft mounted on the frame of the circuit breaker on the left front side of the first connector. The lock cover is always urged in a counterclockwise direction as viewed from the front of the first connector by a coil torsion spring mounted on the lock connector, and the breaker protrudes from the circuit breaker that regulates the rotation end of the lock cover. A stopper pin.

Further, as a third means, the present invention provides a first connector provided on the front surface of the circuit breaker for connecting and disconnecting an auxiliary circuit for operation control of a circuit breaker which is housed and pulled out of the switchboard, and a third connector provided on the switchboard side. An interlock device for restricting attachment / detachment of a connector comprising a second connector and a bracket protruding from a front surface of the circuit breaker and provided in the vicinity of a lower portion of the first connector, and having a vertical movement at a tip end of the bracket A lock pin freely supported and having a lock plate attached to an upper end thereof, a tension spring that always urges the lock pin downward, and the lock pin provided on the bottom plate of the switchboard and in contact with the lock pin. A lock plate driven against the urging force of a tension spring, and a pin support protruding horizontally in the vicinity of below the first connector, movably supported by a pin support, and attached to an upper end of the lock pin. Is It comprises a locking pin which is engaged in the lock plate, and a coil spring for urging in a direction to protrude the locking pin at all times.

[Action]

In the first means of the present invention, the Y-shaped interlock lever rotatably supported by the support shaft provided on the front surface of the circuit breaker is provided with the Y-shaped interlock lever when the connector of the circuit breaker is mounted. The L-shaped operation plate attached to the connector is engaged with the lock pin, the lock pin is moved, the engagement of the interlock lever with the first arm is released, and the interlock lever can rotate. Become. In this state, when the circuit breaker is moved from the disconnection position to the operation position, a second interlock plate is attached to a lock plate provided on the bottom panel of the switchboard halfway.
The roller provided at the end of the arm engages, the interlock lever rotates with the movement of the circuit breaker, and the third arm of the interlock lever approaches the front surface of the second connector in the driving position. Since the rotation of the interlock lever itself is locked by the chain plate, an interlock in which the second connector cannot be removed in this operation position is configured.

Also, if the breaker connector is not installed,
Since the lock pin does not move, the engagement between the lock pin and the first arm is not released. When the breaker is moved to the operating position in this state, the roller engages with the lock plate halfway, and the interlock lever is moved. Since the rotation is locked by the lock pin even if it is attempted to rotate the circuit breaker, an interlock that cannot be moved to the operating position is formed.

In the second means of the present invention, the connector comprises a first connector and a second connector, is locked by a lock claw and a lock lever, and protrudes below the first connector to the front in the horizontal direction. A lock pin is vertically movably supported at the tip of the provided bracket, and is constantly urged downward by a tension spring. This lock pin is driven by being engaged with a lock plate provided on the bottom plate of the switchboard.When the breaker is pulled out, the lock pin is below, and when the breaker is housed in the switchboard, The locking pin is moved upward. On the other hand, a chain cover is rotatably supported by a fulcrum shaft on the left side of the front of the first connector, and the chain cover is constantly urged counterclockwise by a coil torsion spring as viewed from the front of the first connector. ing.

In the second means, when the second connector is not connected with the circuit breaker pulled out, the lock cover is rotated to abut against the stopper pin and locked, and the front face of the first connector is locked. Is covered. If the circuit breaker is to be stored in the switchboard in this state where the second connector is not connected, the lock cover comes into contact with the projecting portion of the lock plate, and the movement of the circuit breaker in the storage direction is locked. That is, when the second connector is not connected, an interlock in which the circuit breaker cannot be stored in the switchboard is configured. When the lock cover is rotated against the biasing force of the coil torsion spring, the second connector can be connected to the first connector, locked by the lock claw and the lock lever, and the lock cover is connected to the second connector. Is locked on the side surface of the lock plate, and does not come into contact with the projecting portion of the lock plate. That is, by mounting the connection device, an interlock in which the circuit breaker can be housed in the switchboard is configured. The locking pin is driven upward by the locking plate from a position where the circuit breaker is stored, and protrudes to the front of the second connector. Thus, an interlock in which the second connector cannot be removed at the storage position of the circuit breaker is configured.

According to the third means of the present invention, a lock pin is vertically movably supported on the tip of a bracket projecting from the front side in the horizontal direction below the first connector, and is constantly urged downward by a tension spring. Have been. This lock pin is engaged with and driven by a lock plate provided on the bottom plate of the switchboard in the same manner as the second means, and when the circuit breaker is pulled out, the lock pin is below and the lock pin is When the switch is stored in the switchboard, the chain pins are moved upward. A lock plate is attached to the upper end of the lock pin. On the other hand, a locking pin is movably supported by a pin support protruding in the horizontal direction near the lower part of the first connector, and the locking pin is constantly urged by a coil spring in a protruding direction.

In the third means, when the circuit breaker is pulled out and the second connector is not connected, the locking pin is below, and the locking pin is projected to engage with the lock plate. When the circuit breaker is to be stored in the switchboard in this state, the lock pin is driven upward by the lock plate provided on the switchboard bottom plate, but the engaged lock pin is moved upward of the lock plate. To lock the movement, when the second connector is not connected,
An interlock in which the breaker cannot be stored in the switchboard is configured. When the second connector is connected to the first connector in a state in which the circuit breaker is pulled out, a projection provided below the second connector pushes the locking pin, and the locking of the locking plate by the locking pin is released. In this state, the circuit breaker can be stored in the switchboard. In this stored state, the lock plate is moved upward to be at the front position of the second connector. In this state, an interlock is formed to lock the second connector from being pulled off.

In any of the first, second, and third means of the present invention described above, when the second connector is not connected in a state where the circuit breaker is pulled out, that is, when the auxiliary circuit of the circuit breaker is not connected, Thus, an interlock can be configured in which the circuit breaker cannot be stored in the switchboard, and the breaker can be stored in the switchboard after the second connector is connected and the auxiliary circuit is connected. In addition, an interlock in which the second connector cannot be pulled off with the circuit breaker stored therein is configured. That is, an interlock device for restricting attachment / detachment of the contact / separation device for connecting / disconnecting the auxiliary circuit for operation control of the circuit breaker is configured.

〔Example〕

A first embodiment of the apparatus according to the present invention will be described with reference to FIGS. These figures are views showing details of the embodiment corresponding to the portion shown in the dashed-dotted circle F in FIG. FIG. 1 is a view showing an interlock device of a circuit breaker auxiliary circuit connecting device according to a first embodiment of the present invention. FIG. Figure 1
It is the front view which omitted the connector seen from the arrow A in the figure. FIG. 3 and FIG. 4 are side views of a partial cross section of FIG. 2 as viewed from an arrow BB, similarly to FIG. In these figures, FIG. 1 is a view showing a circuit breaker equipped with a connection device being moved from a disconnection position to an operation position, and FIG. 3 is further moved from the state of FIG. It is a figure showing the state where it was moved to a driving position. FIG. 4 is a diagram showing a state in which the movement of the circuit breaker, to which the connector is not mounted, is locked during the movement from the disconnection position to the operation position.

1 and 2, the circuit breaker 2 is housed in the switchboard 1, and the circuit breaker 2 is moved to the operating position to connect the main circuit disconnecting section, as in the conventional example described in FIG. The circuit breaker 2 is pulled out from the operating position in the reverse direction and moved to the disconnection position. A connector 8 including a first connector 4 and a second connector 6 is provided below the front surface of the circuit breaker 2 (the left surface in FIG. 1). By attaching and detaching the connector 8, the circuit breaker auxiliary circuit can be electrically and mechanically connected and separated, and serves as a disconnection portion of the auxiliary circuit as in the conventional example. Then, after connecting the connector 8 at the disconnecting position of the circuit breaker 2, the circuit breaker 2 is moved to the operating position to connect the main circuit disconnection, and the circuit breaker 2 is connected to the switchboard 1 side as in the conventional example. It is operated and controlled by the auxiliary circuit.

The device according to the first embodiment of the present invention is an interlock device for restricting the attachment / detachment of the connector 8, and in FIG. 1 and FIG. Near the lower part is a support 10 in which a pair of rectangular plates are provided in parallel on the wall. An interlock lever 12 having three arms and formed in a Y-shape is provided with a support shaft 14 mounted on the support 10 in the vicinity of the distal end of a first arm 12a extending from the front of the breaker 2 to the depth side. It is rotatably supported by. Further, the tip of the first arm 12a from the support shaft 14 is urged upward by an urging mechanism 16 such as a tension spring to rotate the interlock lever 12 clockwise as reflected in the drawing. Interlock lever 12 by force mechanism 16
Is stopped by a stopper 18. The support 10 is provided with an elongated hole 20, and a lock pin 22 is slidably supported in the elongated hole 20, and the lock pin 22 is located at a slidable front position by a biasing mechanism (not shown). The distal end of the first arm 12a of the lock lever 12 is engaged with the lock pin 22 as shown in FIG. 4 to be described later, and the rotation of the interlock lever 12 is locked. A roller 24 is rotatably provided at the tip of the second arm 12b directed downwardly of the interlock lever 12, and a lock plate 26 is provided on the bottom plate 1a of the switchboard 1.
And the roller 24 engages with the lock plate 26. An L-shaped operation plate 28 is attached below the second connector 6, and when the connector 8 is attached and the second connector 6 is fitted to the first connector 4, the L-shaped operation plate 28 is attached. Is engaged with the lock pin 22
22 is moved along the elongated hole 20 to be in the state shown in FIG. As a result, the engagement between the lock pin 22 and the first arm 12a is released, the rotation of the interlock lever 12 by the lock pin 22 is released, and the interlock lever 12 can rotate clockwise. Become.

As described above, the interlock device of the circuit breaker auxiliary circuit according to the first embodiment of the present invention for restricting attachment / detachment of the connector 8 is configured, and the operation thereof will be described below. That is, when the connecting device 8 is mounted on the circuit breaker 2 at the disconnection position and the circuit breaker 2 is moved in the direction of the operating position, the state shown in FIG. 1 is obtained. When the circuit breaker 2 is further moved in the direction of arrow 30 from this state, the roller 24 comes into contact with the slope 26a of the lock plate 26, and the interlock lever 12 is rotated clockwise about the support shaft 14. As shown in FIG. 3, the urging mechanism 16 is extended, and the roller 24 is
When the vehicle rides on the horizontal portion 26b of 26, the rotation of the interlock lever 12 ends. The circuit breaker 2 is moved in the direction of the arrow 30 as it is and stored in the operating position. In the state shown in FIG.
The third arm 12c of the interlock lever 12 comes close to the front surface 6a of the second connector 6, and the
Since the rotation of 12 itself is locked by the horizontal portion 26b of the lock plate 26, an interlock in which the second connector 6 cannot be removed in the operating position is configured. When the circuit breaker 2 is pulled out from this operation position in the direction indicated by the arrow 34 in the opposite direction, the process proceeds in the opposite direction to that described above, and the circuit breaker 2 is moved to the disconnection position via the state shown in FIG. Then, the connection of the connector 8 can be released, the second connector 6 can be removed, and the circuit breaker auxiliary circuit can be brought into the disconnection state.

FIG. 4 shows a state in which the circuit breaker 2 is being moved to the operating position with the connector 8 not connected. Since the second connector 6 is not mounted, the lock pin 22 does not slide, so that the interlock is not provided. The rotation of the lever 12 is locked by a lock pin 22. When the circuit breaker 2 is moved to the operation position in the direction of the arrow 30 in this state, the roller 24 of the interlock lever 12 abuts the slope 26a of the lock plate 26 at the position shown in FIG. As described above, since the rotation of the interlock lever 12 is locked, the movement of the circuit breaker 2 in the direction of the arrow 30 is locked. That is, even if the circuit breaker 2 is stored with the connector 8 not connected, an interlock is configured in which the movement is locked halfway and cannot be moved to the operation position.

The interlock device according to the first embodiment of the present invention
In order to regulate the attachment / detachment of the circuit breaker auxiliary circuit connector provided below the front surface of the connector, a Y-shaped support having a support 10 provided near the lower part of the first connector 4 of the connector 8 and three arms is provided. An interlock lever 12, a biasing mechanism 16 for rotating the interlock lever 12, a stopper 18, a lock pin 22 for locking the rotation of the interlock lever 12, and a bottom plate 1a of the switchboard 1. A roller 24 provided on the interlock lever 12 that engages with the upper surface 26b of the locking plate 26 provided on the
The third arm 12c of the interlock lever 12, which locks the removal of the second connector 6 when the roller 24 is engaged with the upper surface 26b of the lock plate 26, and an operation attached to the second connector 6. A plate 28 is provided. With this configuration, if the second connector 6 of the connector 8 is attached, the circuit breaker 2 can be moved to the operating position, and the second connector 6 cannot be removed at this operating position.
An interlock device that cannot be moved to the operating position when the second connector 6 is not connected is obtained.

A second embodiment of the apparatus of the present invention will be described with reference to FIGS. FIG. 5 shows a second embodiment of the present invention, in which the circuit breaker has been moved to the operating position, and a side view corresponding to FIG. 3, and FIG. 6 is a CC section of FIG. FIG. 5 is a front view including FIG. FIG. 7 is a view from the same direction as FIG. 5 and shows a state in which the second connector is detached and the circuit breaker is moved to the disconnection position, and a side view corresponding to FIG. 4 and FIG. FIG. 7 is a front view of FIG. 7 as viewed from an arrow E.

5 and 6, the circuit breaker 2 is housed in the switchboard 1 and the operating position of the circuit breaker 2 in the direction of the arrow 30 is the same as in the first embodiment described with reference to FIGS. And the main circuit disconnecting portion is connected, and the circuit breaker 2 is pulled out of the operating position in the direction opposite to the arrow 34 and moved to the disconnecting position. A connector 8 including a first connector 4 and a second connector 6 is provided below the front surface of the circuit breaker 2 (the left surface in FIG. 1). By attaching and detaching the connector 8, the circuit breaker auxiliary circuit can be electrically and mechanically connected and separated, and serves as a disconnection portion of the auxiliary circuit as in the first embodiment. Then, after the connecting device 8 is mounted at the disconnecting position of the circuit breaker 2, the circuit breaker 2 is moved to the operating position and the main circuit disconnecting portion is connected, and the circuit breaker 2 is connected to the switchboard 1 as in the first embodiment. And is operated and controlled by an auxiliary circuit.

5 and 6, a first connector 4 is attached to the lower front surface of the circuit breaker 2, and the first connector 4
A bracket 36 protrudes from the front in the horizontal direction. A lock pin 38 is supported at the tip of the bracket 36 so as to be movable in the vertical direction. The lock pin 38 is constantly urged downward by a tension spring 40, and is in contact with a horizontal portion 26b of the lock plate 26 in the figure. . On the left side when viewed from the front of the first connector 4, a fulcrum shaft 42 firmly attached to the frame of the circuit breaker 2 is provided.
As a result, the lock cover 44 is rotatably supported, and the fulcrum shaft 42
Lock cover by coil torsion spring 46 attached to
44 is constantly urged in the counterclockwise direction of arrow 48 as seen in FIG.
The second connector 6 is mounted on the first connector 4, and the second connector 6 is attached to a lock claw 50 provided on the first connector 4.
5 and 6, the lock cover 44 abuts against the side of the second connector 6 to lock the rotation, and a lock lever 52 provided in FIG. 8 and FIG. 8, the stopper pin 54 projecting from the circuit breaker 2 is provided.
, The rotation of the lock cover 44 is prevented from rotating more than specified. In the state shown in FIGS. 5 and 6, the lock pin 38 is located above and on the front surface of the second connector 6, even if the lock lever 52 and the lock claw 50 are disengaged. An interlock in which the second connector 6 cannot be removed is configured.

In the circuit breaker 2 in the disconnecting position shown in FIGS. 7 and 8, the locking pin 38 supported by the bracket 36 is pulled out from the state shown in FIGS. Is in a position where the contact with the inclined portion 26a and the horizontal portion 26b of the lock plate 26 is released, and the lock plate 26 is moved downward by the tension spring 40 so as not to hinder the attachment / detachment of the second connector (6) not shown. ing. When the second connector (6) is removed, the lock cover 44 shown by the two-dot chain line is rotated counterclockwise as shown by the arrow 48 by the urging force of the coil torsion spring 46 about the fulcrum shaft 42, and the stopper pin The rotation is stopped by contacting the position 54, and the position 44a indicated by the solid line is taken. When the circuit breaker 2 is moved in the direction of the arrow 30 shown in FIG. 7 with the second connector (6) being detached, the lock cover 44a comes into contact with the projecting portion 26c of the lock plate 26. The circuit breaker 2 cannot be moved further in the direction of the arrow 30. That is, the lock cover 44a is
, The circuit breaker 2 cannot be moved in the direction of arrow 30 unless the second connector (6) is attached to the first connector 4.

Next, the operation until the circuit breaker 2 is moved from the disconnection position shown in FIGS. 7 and 8 to the operation position shown in FIGS. 5 and 6 will be described.

(A) In the state shown in FIG. 7, when the connector 8 to which the second connector (6) is not attached is not connected, as described above, the circuit breaker 2 Projection of plate 26
Due to the interlock that abuts 26c, it cannot be moved to the driving position in the direction of arrow 30.

(B) The lock cover 44a shown by a solid line in the state shown in FIG.
Is manually rotated clockwise as indicated by an arrow 48 to a position 44 indicated by a two-dot chain line, whereby the second connector 6 is attached to the first connector 4 as shown in FIGS. , Lock claw
The lock lever 52 is engaged with 50, the connector 8 is connected, the auxiliary circuit is connected, and the lock cover 44a and the protrusion 2 are connected.
The interlock with 6c is released, and the circuit breaker 2 can move in the direction of arrow 30.

(C) As the circuit breaker 2 moves in the direction of arrow 30, the locking pin
The lower end of 38 comes into contact with the slope 26a of the lock plate 26, and the lock pin 38
Is raised against the urging force of the tension spring 40, reaches the horizontal portion 26b of the locking plate 26, and reaches the state shown in FIGS. 5 and 6, and as described above, the upper chain The lock pin 38 constitutes an interlock in which the second connector 6 cannot be removed and the connector 8 cannot be disconnected to disconnect the auxiliary circuit.

(D) The circuit breaker 2 is further moved in the direction of the arrow 30, and the main circuit disconnecting portion is connected.

The movement of the circuit breaker 2 from the operating position to the disconnecting position in the direction of the arrow 34 is achieved by performing the operations (a) to (d) in reverse.

A third embodiment of the present invention will be described with reference to FIG.
FIG. 9 shows a third embodiment of the present invention, and shows a state in which the circuit breaker has been moved to the operating position, and is a side view corresponding to FIG. The difference between the second embodiment and the third embodiment is that, in the third embodiment, the projecting portion
There is no 26c, the first connector 4 does not have a lock claw 50, the second connector 6 does not have a lock lever 52, there is no fulcrum shaft 42, a lock cover 44, a coil screw spring 46, and a stopper pin. A lock plate 56 is provided at the upper end of the lock pin 38, and engages with the pin support 58, the lock pin 60, and the coil spring 62 below the first connector 4 and the lock pin 60 below the second connector 6. This is the point where the projection 6a is provided.

In FIG. 9, a pin support 58 is firmly attached below the first connector 4, and a locking pin 60 is supported on the pin support 58 via a coil spring 62 so as to be movable in the directions of arrows 30 and 34. Have been. FIG. 10 is a side view corresponding to FIG. 7, showing a state in which the circuit breaker 2 shown in FIG. 9 is in the disconnection position. In FIG. 10, the lock pin 38 and the lock plate 56 are moved downward by the tension spring 40, and
60 is moved in the direction of arrow 34 by a coil spring 62, and its left end protrudes above the lock plate 56. The second connector (6) shown by the two-dot chain line is not attached. When the circuit breaker 2 is moved in the direction of arrow 30 in this state, the lock plate 26
The lock pin 38 contacting the slope 26a is moved upward, but is locked by the left end of the protruding lock pin 60, so that the breaker 2 is locked from moving in the direction of the arrow 30. Is done.
That is, when the second connector 6 is not attached, an interlock is configured such that the circuit breaker 2 cannot move to the operating position.

In FIG. 10, when the second connector 6 indicated by the two-dot chain line is moved in the direction of arrow 30 and attached to the first connector 4, the projection 6a provided below the second connector 6 is locked. The locking pin 60 is moved in the direction of the arrow 30 against the urging force of the coil spring 62 abutting on the pin 60, as shown in FIG. 9, and the locking of the lock plate 56 is released. As a result, the circuit breaker 2 can be moved in the direction of the arrow 30, and is moved to the operation position as shown in FIG. In this state, since the lock plate 56 projects from the front surface of the second connector 6, an interlock in which the second connector 6 cannot be removed in the operating position is configured.

〔The invention's effect〕

The interlock device according to the first embodiment of the present invention includes a support, an interlock lever, a biasing mechanism, a stopper, a lock pin, a roller, a lock plate, and an operation plate. If the second connector is mounted, the circuit breaker can be moved to the operating position, and the second connector cannot be removed at this operating position.
Since the circuit breaker is not operated in a state where the auxiliary circuit is disconnected, and cannot be moved to the operation position without the second connector attached, the circuit breaker cannot be operated in this state.

The interlock device according to the second embodiment of the present invention includes a bracket, a lock pin, a tension spring, a fulcrum shaft, a lock cover, a coil torsion spring, a lock claw and a lock lever provided on a connector, a stopper pin, a chain. With the configuration including the lock plate, the circuit breaker can be moved to the operating position by attaching the second connector by the combination of these, and the second connector cannot be removed at this operating position. Since the circuit breaker is not operated when the auxiliary circuit is disconnected, and cannot be moved to the operation position without the second connector attached, it is impossible to operate the circuit breaker in this state. .

The interlock device according to the third embodiment of the present invention includes a bracket, a lock pin, a lock plate, a tension spring, a pin support,
Since it is provided with a locking pin, a coil spring, a projection provided below the second connector, and a locking plate, the breaker is moved to the operating position when the second connector is mounted by a combination of these. Since the second connector cannot be removed in this operation position, the circuit breaker does not operate in a state where the auxiliary circuit is disconnected, and the operation position can be changed to the operation position when the second connector is not mounted. Since it cannot move, it is impossible to operate the circuit breaker in this state.

Since the interlock devices of the first, second, and third embodiments all constitute interlocks having the same function, according to the present invention, the attachment / detachment of the connector is restricted, and as a result, An interlock device that can prevent erroneous operation of the circuit breaker can be provided.

[Brief description of the drawings]

FIGS. 1 to 4 show a first embodiment of an interlock device for a circuit breaker auxiliary circuit connector according to the present invention, which corresponds to a portion shown in a dashed-dotted circle F in FIG. 11 described later. FIG. 1 is a view showing the details, and FIG. 1 is a partial cross-sectional side view of FIG. 2 to be described later, which is viewed from an arrow BB. FIG. 2 is a front view of FIG. 1 omitting a connector viewed from arrow A, and FIGS. 3 and 4 are arrows BB of FIG. 2 as in FIG. FIG. 3 is a side view of a partial cross section viewed from FIG. 3, FIG. 3 is a view showing a state where the circuit breaker is further moved from the state of FIG. 1 and the circuit breaker is moved to an operation position, and FIG. FIGS. 5 to 8 show a state in which the movement is locked during the movement of the switch from the disconnection position to the operation position, and FIGS. 5 to 8 show a second embodiment of the present invention. FIG. 5 is a side view corresponding to FIG. 3 showing a state in which the circuit breaker has been moved to the operating position, FIG. 6 is a front view of FIG. 5 viewed from arrow C, and FIG. FIG. 7 is a side view corresponding to FIG. 4 and FIG. 8 is a view seen from the same direction as FIG. 5, showing a state in which the second connector is detached and the circuit breaker is moved to the disconnection position. 9 is a side view showing the third embodiment of the present invention, FIG. 9 is a side view showing a state where the circuit breaker shown in FIG. 9 is in the disconnection position, and FIG. FIG. 3 is a side view showing a conventional example of a connector for connecting and disconnecting an auxiliary circuit for operation control of a circuit breaker. 1: switchboard, 1a: bottom plate, 2: circuit breaker, 4: first connector, 6:
Second connector, 8: connector, 10: support, 12: interlock lever, 12a: first arm, 12b: second arm, 12c: third arm, 14: support shaft, 16: bias Mechanism, 18: Stopper, 22: Lock pin, 24: Roller, 26: Locking plate, 28: Operation plate, 32: Main circuit disconnecting part, 36: Bracket, 38: Locking pin, 42: Support shaft, 44: Lock cover, 46: coil torsion spring, 54: stopper pin, 56:
Lock plate, 60: locking pin.

Claims (3)

(57) [Claims] 1. A first connector provided on the front surface of the circuit breaker for connecting and disconnecting an auxiliary circuit for operation control of a circuit breaker housed and pulled out from a switchboard, and a second connector provided on the switchboard side. An interlock device for restricting attachment / detachment of a connector, comprising: a support protruding from the front surface of the circuit breaker and provided in the vicinity of a lower portion of the first connector; An interlock lever rotatably supported by a support shaft mounted on the support near the distal end of a first arm extending from the front of the circuit breaker to the depth side, and the support shaft of the first arm of the interlock lever; A biasing mechanism for rotating the interlock lever by biasing the tip upward, a stopper for locking the rotation of the interlock lever by the biasing mechanism, and a sliding hole slidably provided in the support. Wherein In the forward position slide by the force of approval by urging mechanism first interlock lever
A lock pin that engages with the tip of the arm to lock the rotation of the interlock lever; and a lock pin that is rotatably provided at the tip of a second arm that goes downward of the interlock lever and is provided on the bottom plate of the switchboard. A roller engaged with the upper surface of the lock plate; and an interface for approaching the front surface of the second connector when the roller engages with the upper surface of the lock plate and locking removal of the second connector. A circuit breaker auxiliary circuit connection, comprising: a third arm of a lock lever; and an operation plate attached below the second connector and moved by the engagement of the lock pin. Interlock device. 2. A first connector provided on the front surface of the circuit breaker for connecting / disconnecting an auxiliary circuit for operation control of a circuit breaker housed and pulled out of the switchboard, and a second connector provided on the switchboard side. An interlock device for restricting attachment / detachment of a connector locked by a lock claw and a lock lever, wherein the bracket protrudes from a horizontal front surface of the circuit breaker and is provided near a lower portion of the first connector; A locking pin supported at the tip of the bracket so as to be vertically movable, a tension spring that constantly urges the locking pin downward,
The chain pin provided on the bottom plate of the switchboard and abutting the lock pin is driven against the urging force of the tension spring, and is attached to the frame of the circuit breaker on the left front side of the first connector. A lock cover which is rotatably supported by the fulcrum shaft and is always urged in a counterclockwise direction as viewed from the front of the first connector by a coil torsion spring mounted on the fulcrum shaft; and rotation of the lock cover. An interlock device for a circuit breaker auxiliary circuit connector, comprising: a stopper pin protruding from the circuit breaker for regulating a termination. 3. A first connector provided on the front face of the circuit breaker for connecting and disconnecting an auxiliary circuit for controlling the operation of the circuit breaker which is housed and pulled out of the switchboard, and a second connector provided on the switchboard side. An interlock device for restricting attachment / detachment of a connector, comprising: a bracket protruding from the front surface of the circuit breaker and provided in the vicinity of a lower portion of the first connector; A lock pin having a lock plate attached to an upper end thereof, a tension spring that constantly urges the lock pin downward, and a lock pin provided on the bottom plate of the switchboard and abutting against the urging force of the tension spring. And a lock plate movably supported by a pin support protruding horizontally in the vicinity of the lower part of the first connector and attached to an upper end of the lock pin. Engaged A locking pin interlock for circuit breaker auxiliary circuit connector characterized by comprising a coil spring for urging in a direction to protrude the locking pin at all times.