JP4856583B2 - Circuit breaker handle lock device and circuit breaker - Google Patents

Description

  The present invention relates to a handle lock device that prohibits operation of an operation handle of a circuit breaker.

As a conventional handle lock device for a circuit breaker, for example, there is a configuration disclosed in Patent Document 1. This was formed in a cylindrical shape so as to cover the entire handle protruding from the circuit breaker case, and further provided with a moving space for the handle that moves when the breaking operation is performed. The handle lock device is provided with a display body that is interlocked with the movement of the operation handle, and a window for viewing the display body is provided so that the shut-off operation can be recognized with the lid applied. It was.
JP 2003-31099 A

  The configuration of the above-mentioned patent document 1 can identify a circuit breaker that has performed a shut-off operation even when the handle lock device is attached by observing a change in an internal display body through a window. However, since the operation of the handle lock device is confirmed by a change in the display in the window, it is difficult to confirm the operation, and the handle lock device must be removed when the circuit breaker is turned on again. The re-input operation could not be performed.

  Therefore, in view of such problems, the present invention provides a circuit breaker handle lock device and a circuit breaker that are easy to check the breaking operation and can be turned on again with the handle lock device attached. The purpose is to provide.

In order to solve the above-mentioned problem, the invention according to claim 1 is a handle lock device that is attached to a circuit breaker that changes the position of the operation handle when the operation is interrupted, and prohibits the operation handle from being turned off. A concealing plate that conceals the operation handle in the on state and prohibits the operation of the operation handle, and the concealing plate engages with the operation handle moved by the circuit breaker breaking operation to open the door plate Is provided, and the blocking operation is notified by the opening operation of the door plate.
According to this configuration, since the door plate opens upon receiving the blocking operation, it can be recognized at a glance that the blocking operation has been performed even when the handle lock device is attached.

According to a second aspect of the present invention, in the first aspect of the present invention, when the operation handle is in contact with the back surface of the door plate to spread the door plate during the blocking operation, the door plate that has been opened is closed. The operation handle is turned in the ON direction to re-insert the circuit breaker.
According to this configuration, the re-insertion operation can be performed without removing the handle lock device, and the re-input operation can be performed with a simple operation even when the handle lock device is attached.

The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, it is provided with urging means for constantly urging the door plate in the closing direction.
According to this configuration, the door plate maintains a closed state without providing a locking mechanism. Therefore, the opening operation is smoothly performed by the standing operation of the handle, and the opening operation is not performed when the circuit breaker is on.

According to a fourth aspect of the present invention, there is provided a circuit breaker comprising an operation handle that is tilted so as to be substantially parallel to the surface of the circuit breaker case in the on state, and the operation handle is erected when the operation is interrupted. A handle lock device according to any one of the above is provided.
According to this configuration, since the door plate opens upon receiving the blocking operation, it can be recognized at a glance that the blocking operation has been performed even when the handle lock device is attached. Further, since the operation handle is substantially parallel to the surface of the case in the on state, even if a door plate is provided, the protrusion amount on the operation handle of the handle lock device is small.

According to the present invention, since the door plate opens upon receiving the shut-off operation, it can be recognized at a glance that the shut-off operation is performed with the handle lock device attached, and the re-insertion operation can be performed without removing the handle lock device. It can be re-entered with a simple operation.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. 1 to 3 show a handle lock device and a circuit breaker according to the present invention, FIG. 1 is a perspective view of a circuit breaker locked on by the handle lock device, and FIG. 2 is a cross-sectional explanatory view of FIG. 3 is a perspective view of the circuit breaker which is turned off by removing the handle lock device. FIG. 2 shows only the configuration of the main part of the invention.

  1 to 3, 1 is a circuit breaker, 2 is a handle lock device, 3 is an operation handle for turning on / off an electric circuit, 4 is a power supply side terminal, and the load side is on the back surface facing the power supply side terminal 4. Terminals (not shown) are provided. The operation handle 3 is disposed substantially at the center of the upper surface of the circuit breaker case 1a and can be rotated around the rotation shaft 3a. The state shown in FIG. 2 tilted forward is turned on, and the state shown in FIG. It is. However, the off state is a state in which the shut-off operation is performed at the same time as the off operation.

  The handle lock device 2 includes a concealing plate 10 that covers the upper side of the operation handle 3 and a side plate 11 that hangs around the concealment plate 10. The space which accommodates is formed. Further, inside the left and right side plates 11, there is a locking portion (not shown) for locking to the operation handle protection frame 5 protruding from the upper surface of the circuit breaker case 1 a so as to close the operation handle 3. The state of covering the upper surface of the circuit breaker case 1a is maintained.

  The concealing plate 10 is provided with a rectangular opening 10 a and is closed by the door plate 12. As shown in FIG. 2, the door plate 12 has a shaft attachment portion 13 that is pivotally attached to the concealment plate 10 at the rear base portion, and is always opened by a torsion spring 14 installed on the shaft attachment portion 13. It is urged in the direction of closing. On the other hand, a tongue piece 17 that engages with a receiving piece 16 formed on the concealing plate 10 is provided at the front end of the door plate 12, and the closed door plate 12 has a top surface that is flush with the concealing plate 10. It is blocked while keeping. In addition, as shown in FIG. 2, the back surface of the door plate 12 is provided with an inclined surface 12 a that is inclined downward toward the tip, so that the tip of the operation handle 3 contacts.

  Hereinafter, the operation of the handle lock device 2 configured as described above will be described. When the operation handle 3 is turned on, the operation handle 3 is tilted as shown in FIG. 2, which is substantially parallel to the upper surface of the circuit breaker case 1a. The door plate 12 of the handle lock device 2 attached at this time is closed by the action of the torsion spring 14, and this closed state is maintained. At this time, since the surfaces of the concealment plate 10 and the door plate 12 are flush with each other, the door plate 12 cannot be opened by an operation from the outside in this state. Thus, the operation handle 3 cannot be opened and the on state is locked.

In this handle lock state, the operation handle 3 which is in the on state is in a state where the tip end abuts on or is close to the back surface of the door plate 12. When the shut-off operation is performed in this state, the operation handle 3 rises and the door plate 12 opens. FIG. 4 is a cross-sectional explanatory view of the circuit breaker 1 that has been cut off. Upon receiving the cut-off operation, the operation handle 3 rotates in the direction of arrow A, and the operation handle 3 comes into contact and is pushed up as shown in FIG. The door plate 12 is opened. The elasticity of the torsion spring 14 is set to be sufficiently smaller than the rotational force of the operation handle 3 in the standing direction.
Thus, the door plate 12 is in the state shown in FIG. 4, and the state of the handle lock device 2 changes in conjunction with the rotation of the operation handle 3 due to the blocking operation.

  The operation when the door plate 12 is closed in this shut-off state is as follows. However, the operation handle 3 in the standing state after the blocking operation is in contact with the door plate 12 at an angle that rotates in the on-operation direction opposite to the blocking operation in response to the closing operation of the door plate 12. When the door plate 12 is closed (turned in the direction of arrow B in FIG. 4) in this state, the operation handle 3 slides on the back surface (inclined surface 12a) of the door plate 12 and tilts in the circuit breaker ON direction. Operate. Due to this action, the operation handle 3 performs the same operation as the ON operation by closing the door plate 12, and the circuit breaker 1 is turned ON by being completely closed. That is, a recharging operation is performed by this operation. As a result, the ON state is maintained by a latch mechanism (not shown) inside the circuit breaker, and the state returns to the state of FIG.

In this way, the door plate opens in response to the blocking operation, so that it can be recognized at a glance that the blocking operation has been performed even when the handle lock device is attached. In addition, the closing operation can be performed by closing the door plate, and even if the handle lock device is attached, it can be restarted with a simple operation. Further, since the operation handle is substantially parallel to the surface of the case in the ON state, even if a door plate is provided, the protrusion amount on the operation handle of the handle lock device is small.
Also, since the door plate is kept closed by the elastic force of the torsion spring, the door plate can be kept closed without providing a locking mechanism, and the handle can be opened smoothly by the standing operation of the handle. There is no such thing as opening in the state.

In the above embodiment, the operation handle 3 is shown to be parallel to the circuit breaker case 1a at the time of ON operation. However, the operation handle 3 does not have to be parallel, and is a circuit including an operation handle that further rises by a shut-off operation. If it is a circuit breaker, the said handle lock apparatus is applicable favorably.
Further, although the concealment plate 10 is also arranged in parallel with the upper surface of the circuit breaker case 1a in accordance with the operation handle 3, it may be provided, for example, inclined rearward according to the operating angle of the operation handle to be concealed.

It is a perspective view of the circuit breaker of an ON state which shows an example of the circuit breaker concerning the present invention, and is equipped with a handle lock device. It is a cross-sectional explanatory drawing of the circuit breaker of FIG. It is the perspective view of the circuit breaker which isolate | separated the handle | steering-wheel locking apparatus of FIG. 1, and was made into the OFF state. It is sectional explanatory drawing of the circuit breaker which shows the state which interrupted.

Explanation of symbols

  1. Circuit breaker, 1a, Circuit breaker case, 2, Handle lock device, 3, Operation handle, 10: Concealing plate, 10a, Opening, 12, Door plate, 14, Torsion spring (Biasing means).

Claims (4)

A handle lock device that is attached to a circuit breaker that changes the position of the operation handle when the operation is interrupted and prohibits the operation handle from being turned off.
There is a concealing plate that conceals the operation handle in the on state and prohibits the operation of the operation handle, and the concealing plate has a door plate that opens when the operation handle moved by the circuit breaker's shut-off operation is engaged. Provided,
A handle lock device for a circuit breaker, wherein the breaking operation is notified by opening the door plate. The operation handle abuts against the back surface of the door plate during the shut-off operation, spreads the door plate, and when the opened door plate is closed, the operation handle rotates in the on direction to turn on the circuit breaker. 2. The circuit breaker handle lock device according to claim 1, wherein re-injection is performed. The handle lock device for a circuit breaker according to claim 1 or 2, further comprising urging means for constantly urging the door plate in the closing direction. 4. A circuit breaker comprising an operation handle that tilts so as to be substantially parallel to the surface of the circuit breaker case in an on state, wherein the operation handle stands up when performing a breaking operation, and the handle according to any one of claims 1 to 3 A circuit breaker comprising a locking device.

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