JPH07230743A - Circuit breaking unit - Google Patents

Abstract

PURPOSE:To automatically lock a door associated with moving an operating handle to an on-position by remote operation. CONSTITUTION:When an operating handle 201 is moved to an on-position b remote control when a door is placed in a closed condition, a door interlocking level 3 is pressed by the operating handle 201 against a spring 10, and a point end of the door interlocking lever 3 is inserted to a U-shaped part of an interlock metal fitting 12, to disable the door from opening. When the operating handle 201 is moved to an off-position by remote control, the door interlocking lever 3 is pulled by the spring and dislocated from the U-shaped part, to enable the door to open.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a circuit breaker unit which accommodates a circuit breaker capable of remotely controlling a handle position of a switch for opening / closing a switch, and more particularly to automatically locking a door in a closed state. It is related to the structure.

[0002]

2. Description of the Related Art Conventionally, in a circuit breaker in which a handle position of a switch for opening / closing is manually operated, a door is provided with a lock mechanism. Further, since it is dangerous for an outsider or the like to open the door in the closed state, an operator who operates the switch handle position to the closed position operates the lock mechanism to lock the door.

[0003]

In the conventional technique of providing the lock mechanism on the door, the door may not be locked in the closed state due to the operator forgetting to operate the door.

Further, in the circuit breaker capable of remotely controlling the handle position of the switch for opening / closing, in order to remotely control the handle position, the operator has conventionally used a lock mechanism provided on the door. It cannot be operated. Further, for example, providing such a remote control mechanism dedicated to the lock mechanism complicates the configuration of the entire system, and there is a problem that the door is not locked in the closed state due to the operator forgetting to operate.

In view of the above, the present invention provides a circuit breaker capable of remotely controlling the handle position of a switch for opening / closing a circuit by using a simple and reliable structure to automatically lock the door of the device in the closed state. To aim.

[0006]

[Means for Solving the Problems] To achieve the above object,
The present invention provides a circuit breaker unit equipped with a remotely operable circuit breaker, at least an openable / closable or removable cover member for sealing the circuit breaker, and a position corresponding to a closed state of the circuit. It moves mechanically in conjunction with the movement of the handle, engages with the cover member in the position for sealing the circuit breaker, and locks the cover member in the position for sealing the circuit breaker. And a locking mechanism.

To achieve the above object, the present invention provides
A circuit breaker unit equipped with a circuit breaker that can be operated remotely is provided with a cover member that seals at least the circuit breaker and that can be opened or closed or is removable. A lock mechanism that locks the circuit breaker at the position where it is sealed, and the remote control signal that indicates the closed state of the circuit are electrically linked to electrically control the lock mechanism and seal the circuit breaker. The cover at the position
And a lock control circuit for locking the member in the position.

In such a circuit breaker unit, the lock of the cover member at the position for sealing the circuit breaker by the lock mechanism is forcibly released in response to a manual operation. It is desirable to have a release device.

[0009]

The circuit breaker unit according to the present invention mechanically or electrically interlocks with the remote operation signal indicating the movement of the handle to the position corresponding to the closed state of the circuit or the closed state of the circuit. Then, the lock mechanism covers
Lock parts automatically. Therefore, the door is reliably locked in response to the closed state by remote control.

Further, the releasing device forcibly releases the lock of the cover member at the position for sealing the circuit breaker by the lock mechanism in response to the manual operation. Therefore, at the time of failure, the cover member can be manually opened or released.

[0011]

Embodiments of the present invention will be described below by taking application to a control center as an example.

First, a first embodiment of the present invention will be described.

FIG. 1 shows the appearance of the control center.

As shown in the figure, the control center comprises a plurality of units 100, and each unit accommodates a power supply circuit and a circuit breaker for turning on / off the power supply circuit.

FIG. 2 shows the structure of each unit 100.

As shown in the figure, each unit 100 has a structure in which the opening / closing door 11 is opened and the instrument mounting plate 1 can be pulled out.

A cutoff control unit 200, a current CT300 that constitutes a power supply circuit, an electromagnetic switch 301, an electric leakage relay 302, etc. are attached to the instrument mounting plate 1. As will be described in detail later, the shutoff control unit 2
A door interlock lever 3 is attached to the door 00, and an interlock fitting 12 is engaged with the door 11 when the operation handle described later is in the ON position when the door 11 is closed. It is fixed in position. Further, the door 11 is provided with a through hole 110 for operating a release unit described later with the door 11 closed.

Next, the structure of the shutoff control unit 200 is shown in FIG.

In the figure, 201 is an operating handle which is interlocked with a switch for opening and closing the power supply circuit, 2 is an electric operating circuit breaker equipped with the operating handle 201, and 3 is an electric operating circuit breaker 2 A door interlock lever rotatably mounted on the pivot shaft 207, 5 is a decorative plate, 6 is a mounting plate for fixing the decorative plate to the circuit breaker 2 for wiring, 7
Is a release unit fixed to the decorative plate 6 for rotating the door interlock lever 3 in the counterclockwise direction. One end of the release unit 10 is fixed to the door interlock lever 3 and the other end is fixed to the electrically operated wiring breaker 2. It is a spring. Spring 10
The door interlock lever is pulled to the right in the figure, that is, the door interlock lever 3 is rotated counterclockwise. Reference numeral 9 is a release pin for rotating a movable core of a release unit 7 described later. Further, this release pin 9 is provided with a door 1 even when the door is closed through a through hole 101 provided in the door 11 as shown in FIG.
It can be operated from the outside of 1 with a flat-blade screwdriver or the like.

Further, the figure shows a state in which the operation handle 201 is in the ON position, and 12 shows the position of the interlock fitting 12 when the door 11 is closed.

The circuit breaker 2 for electrically operated wiring is fixed to the equipment mounting plate 1.

Here, a front view of the shutoff control unit 200 when the operation handle 201 is in the ON position and the door 11 is in the closed state is shown in FIG. 4, a side view is shown in FIG. 5, and a plan view is shown in FIG. It is shown together with the interlock fitting 12.

The circuit breaker 2 for electrically operated wiring accommodates an electric circuit for electrically operating the position of the operation handle 201 in accordance with remote operation.

FIG. 7 shows the configuration of this electric circuit.

In the figure, reference numeral 22 denotes a switch which is mechanically turned on when the door 11 is closed and turned off when the door 11 is opened. When the door 11 is opened, the operating power is supplied to this circuit. By stopping the operation, the position of the operation handle 201 is prevented from being moved to the ON position by the remote operation when the door 11 is opened.

When the switch 18a is turned on by remote control, the thyristor 27 is fired and the relay coil 2 is turned on.
6 is excited. When the relay coil 26 is excited, the contact of the relay 24 is switched to the upper position in the figure, and the motor 23 that moves the operation handle 201 rotates.

When the rotation amount motor 23 corresponding to the movement of the operation handle 201 to the ON position is rotated, the contact of the cam position detection switch 25 is switched to the lower position in the drawing, and the contact of the relay 24 is moved to the lower position in the drawing. Switch to position, motor 23
Stops.

On the other hand, when the switch 18b is turned on by remote control, the thyristor 28 is fired and the relay coil 2 is turned on.
6 is excited. When the relay coil 26 is excited, the contact of the relay 24 switches to the upper position in the figure, and the motor 23 that moves the operating handle 201 rotates.

When the rotation amount motor 23 corresponding to the movement of the operation handle 201 to the off position is rotated, the contact of the cam position detecting switch 25 is switched to the upper position in the drawing, and the contact of the relay 24 is moved to the lower position in the drawing. Switch to position, motor 23
Stops.

The switches 18a and 18b are always
It is a switch that can turn on only one of them.

Now, as can be seen from FIGS. 3, 4, 5 and 6,
When the operation handle 201 is moved to the ON position by remote operation while the door 11 is closed, the operation handle 201
As a result, the door interlock lever 3 is pushed against the spring 10, the tip of the door interlock lever 3 is inserted into the U-shaped portion of the interlock fitting 12, and the door cannot be opened.

On the other hand, as shown in FIG. 8, when the door 11 is closed and the operation handle 201 is moved to the off position by remote operation, the door interlock lever 3 is not pushed by the operation handle 201. The door interlock lever 3 is pulled by the spring 10 so that the tip of the lever 3 is disengaged from the U-shaped portion of the interlock fitting 12, and the door can be opened.

When the operation handle 201 is moved against the spring 204 to the ON position when the door 11 is open,
When the door 11 is closed, the door interlock lever 3 rotates counterclockwise along the inclined portion of the interlock fitting 12 fixed to the door 11, and when the door 11 is completely closed, The tip of the door interlock lever 3 is inserted into the U-shaped portion of the interlock fitting 12, and the door cannot be opened.

By doing so, the operation handle 201 is pushed by the door interlock lever 3 which rotates along the inclined portion of the interlock fitting 12.

However, this is the operation handle 201,
Equipped with a toggle mechanism that has the property of returning from the on position or off position to the original position even if it is moved by a slight amount less than a certain amount.
If the door interlock lever 3 is made to rotate slightly, even if the operation handle 201 is moved by the rotation of the door interlock lever 3 when the operation handle 201 is turned on and the door 11 is closed, the door is locked. In the state where 11 is completely closed, it is possible to return to the original ON position and not move to the OFF position by the toggle mechanism described above.

Alternatively, a margin for moving the operation handle 201 by rotating the door interlock lever 3 may be provided at the ON position.

As described above, according to this embodiment, when the operation handle is moved to the ON position by remote control, the door is locked in conjunction with this. When the operation handle is moved to the off position by remote control, the door is unlocked in conjunction with this.

In a special case such as a failure, it may be necessary to open the door 11 when the operation handle 201 is in the ON position.

Therefore, in this embodiment, the operating handle 20
When 1 is in the ON position, the door 11 is opened by a special operation.

The release unit 7 (see FIGS. 3, 4, 5 and 6) plays a role of unlocking the door 11 when the operation handle 201 is in the ON position.

FIG. 9 shows the structure of the release unit 7.

In the figure, 70 is a unit fixing frame, 8 is a movable core, 9 is a release pin, and 10 is a return spring.

The release pin 9 has a rotation stop and is engaged with the movable core 8. In addition, the movable core 8 is the return spring 1
The unit fixing frame 70 is always urged by 0. Further, the release pin 9 can overcome the force of the return spring 10 and rotate in the clockwise direction to rotate the reverse L-shaped bent portion of the movable core 8.

As shown in FIG. 4, when the door 11 is closed and the operation handle 201 is in the ON position, the release pin 9 of the release unit 7 is set to the door 1 as described above.
When it is rotated by a driver or the like through the through hole 110 (see FIG. 2) provided in No. 1, the movable core 8 is rotated by the rotor and the inverted L-shaped bent portion of the movable core 8 as shown in FIG. The end face of the door lever 3 is pushed, and the door interlock lever 3 rotates counterclockwise. Then, the door interlock lever 3 moves to a position out of the U-shaped portion of the interlock fitting 12 fixed to the door 11. Therefore, the door 11 can be opened.

The amount of rotation of the door interlock lever 3 due to the rotation of the movable core 8 is determined by the operation handle 201 which moves with the rotation of the door interlock lever 3.
However, with the return of the movable core 8 by the return spring 10 after opening the door 11, the amount is set to be equal to or less than the amount that can be returned to the original ON position by the toggle mechanism described above. Alternatively, the rotation of the interlock lever 3 due to the rotation of the movable core 8 may allow a margin for the operation handle 201 to move.

Alternatively, the operation handle 201 may be moved to the off position by the rotation of the movable core 8.

The first embodiment of the present invention has been described above.

In the above description, the operating handle 20
The structure in which the interlock lever 3 is directly rotated by means of 1 has been described.
The interlock lever 3 may be indirectly rotated via another member that is interlocked with the movement of the interlock lever 3.

That is, for example, as shown in FIG. 11, the structure is such that the interlock lever 3 is rotated through the slide plate 17 that moves along the rail 204 as the operation handle 201 moves. May be.

The second embodiment of the present invention has been described below.

In the first embodiment, the door 11 is locked mechanically interlocked with the movement of the operation handle 201 to the ON position when the door 11 is closed. However, in the second embodiment, the operation handle is locked. Motor 2 for moving 201 to the ON position
The door 11 is locked by being electrically linked to the control of 3.

That is, as shown in FIG. 12, the decorative plate 3
The solenoid coil 13 for pushing out the lock rod 205 is fixedly attached to the door 1, and the door 1 is provided with the interlock metal fitting 12 having a shape to be fitted with the lock rod 205. Solenoid coil 13
When excited, lock rod 205 interlocking metal fitting 1
It is a solenoid coil 13 that pushes out to a position where it is fitted with 2. Further, the lock rod 205 is the solenoid coil 13
Is held at a position where it does not fit with the interlock metal fitting 12 when it is not excited.

Then, as shown in FIG. 13, the solenoid coil 13 is included in an electric circuit (see FIG. 7) which is electrically operated in response to remote operation.

In this electric circuit, when the switch 18a is turned on by remote control, the thyristor 27 is fired,
The solenoid coil 13 is excited, the lock rod 205 is pushed out, the lock rod 205 is fitted, and the door 11 cannot be opened. Further, as described above, the relay coil 26
Is excited, the contact point of the relay 24 is switched to the upper position in the figure, and the motor 23 that moves the operation handle 201 rotates,
The position of the operation handle 201 is moved to the ON position.

On the other hand, when the switch 18b is turned on and the switch 18a is turned off by remote control, the solenoid coil 13 is no longer excited, the lock rod 205 returns to its original position, and the lock rod 205 is disengaged from the interlock fitting 12 and the door 11 is opened.
Will open.

The other operations are the same as those in the first embodiment.

Next, a third embodiment of the present invention will be described.

In the third embodiment, it is detected that the operation handle 201 is in the ON position, and the door 11 is locked accordingly.

That is, for example, as shown in FIG. 14, an optical sensor 14 for detecting that the operation handle 201 is in the ON position is provided, and the solenoid coil 3 shown in the second embodiment is excited in response to the detection signal. You can do it.

The excitation of the solenoid coil 3 according to the detection signal can be realized by the electric circuit shown in FIG. In addition, 16 in this electric circuit
Is a switch for turning off the solenoid coil 3 when opening the door 11 when the operation handle is in the on position.

The embodiment of the present invention has been described above by taking the application to the control center as an example.
It can be similarly applied to various circuit breakers that are remotely operated, such as an operation panel. Further, the same can be applied to the case where a removable cover or the like is used instead of the door.

[0062]

As described above, according to the present invention, an open circuit /
In the circuit breaker capable of remotely controlling the handle position of the switch for closing the circuit, the door of the device can be automatically locked in the closed state by a simple and reliable structure.

In the circuit breaker having such a structure, it is possible to provide a means for unlocking the door, particularly manually.

[Brief description of drawings]

FIG. 1 is a diagram showing an appearance of a control center according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the structure of the unit according to the embodiment of the present invention.

FIG. 3 is a perspective view showing the structure of a shutoff control unit according to the first embodiment of the present invention.

FIG. 4 is a front view showing the structure of an interruption control unit according to the first embodiment of the present invention.

FIG. 5 is a side view showing the structure of the shutoff control unit according to the first embodiment of the present invention.

FIG. 6 is a plan view showing the structure of an interruption control unit according to the first embodiment of the present invention.

FIG. 7 is a circuit diagram showing an electric circuit of the cutoff control unit according to the first embodiment of the present invention.

FIG. 8 is a diagram showing a locking operation of the shutoff control unit according to the first embodiment of the present invention.

FIG. 9 is a front view showing the structure of the release unit according to the first embodiment of the present invention.

FIG. 10 is a view showing the operation of the release unit according to the first embodiment of the present invention.

FIG. 11 is a front view showing another structure of the shutoff control unit according to the first embodiment of the present invention.

FIG. 12 is a front view showing the structure of an interruption control unit according to a second embodiment of the present invention.

FIG. 13 is a circuit diagram showing an electric circuit of an interruption control unit according to a second embodiment of the present invention.

FIG. 14 is a front view showing the structure of an interruption control unit according to a third embodiment of the present invention.

FIG. 15 is a circuit diagram showing an electric circuit of an interruption control unit according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Equipment Mounting Plate 2 Circuit Breaker for Electric Wiring 3 Door Interlock Lever 5 Decorative Plate 6 Mounting Plate 7 Release Unit 11 Door 12 Interlock Metal Fitting 100 Unit 110 Through Hole 200 Break Control Unit 201 Operation Handle 10 Spring

Claims (3)

[Claims] 1. A circuit breaker unit containing a circuit breaker for determining the open / closed state of a circuit according to the position of a handle, and an operation unit for moving the position of the handle according to a remote operation, A cover member that seals the circuit breaker and that can be opened and closed or is removable, and mechanically interlocks with the movement of the handle to a position corresponding to the closed state of the circuit to seal the circuit breaker. A circuit breaker unit, comprising: a lock mechanism that engages with the cover member at a position to lock the cover member at a position for sealing the circuit breaker. 2. A circuit containing a circuit breaker for determining the open / closed state of the circuit according to the position of the handle, and an operation section for moving the position of the handle according to a remote control signal indicating the open / closed state of the circuit. A circuit breaker unit, which comprises at least an openable / closable or removable cover member that seals the circuit breaker, and locks the cover member at a position that seals the circuit breaker according to electrical control. A lock mechanism for controlling the lock mechanism to electrically control the lock mechanism by electrically interlocking with the remote control signal for instructing the closed state of the circuit, and to cover the circuit breaker. A circuit breaker unit comprising: a lock control circuit for locking the position. 3. The circuit breaker unit according to claim 1, wherein the lock mechanism forcibly locks the cover member at a position for sealing the circuit breaker according to a manual operation. A circuit breaker unit having a releasing device for releasing.