JP4893375B2 - Closed switchboard - Google Patents

Description

  The present invention relates to a closed switchboard in which a drawer type circuit breaker (for example, a high voltage vacuum circuit breaker) or the like is accommodated as a power receiving / distributing device in the panel. A handle mechanism that moves to “position” and “disconnect position”, and an unlock mechanism that releases the lock of the power receiving and distributing device that is locked to the “operating position” and “disconnect position” by operating from outside the panel. Related to the structure.

As is well known, in the closed distribution board described above, the main body of the drawer type distribution device is mounted on a wheeled movable carriage and placed on the cradle installed in the board, and the fixed contact of the main circuit disconnection part on the back of the cradle And moving the power receiving / distributing device to the “operating position” and “disconnecting position” in the panel, the movable contact of the main circuit disconnecting portion pulled out from the power receiving / distributing device to the back of the main circuit disconnecting portion It is connected to the fixed contact and disconnected.
Here, as an operation means for moving the power receiving / distributing equipment to the above-mentioned “operating position” and “disconnect position”, conventionally, the power receiving / distributing equipment is manually pushed in and pulled out from the front using a lever lever type handle. Is generally adopted (see, for example, Patent Document 1).
In addition to the above-mentioned moving means, the drawer type power receiving / distributing device is equipped with an interlock device that locks and releases the drawer-type power receiving / distributing device at the “operating position” and “disconnection position” to prevent mistakes in the operation of the power receiving / distributing device. (For example, refer to Patent Document 2).
JP-A-10-191512 JP-A-3-235604

In the above-mentioned conventional closed switchboard, the operation of the power distribution / distribution equipment in the panel and the release operation of the lock are performed manually after the maintenance person accesses the power distribution equipment in the panel after opening the panel door of the closed switchboard. Like to do. On the other hand, recently, in order to ensure human safety (prevention of electric shock) during maintenance and inspection, as a user request, a drawer-type power distribution device housed in the panel with the panel door of the closed distribution panel closed. Can be moved to “operating position” and “disconnect position” from outside the panel, locked and released at each position, and interlocked so that the panel door cannot be opened at “operating position”. Is desired.
The present invention has been made in response to the above-mentioned demand. The purpose of the present invention is to operate a drawer type power distribution device housed in the panel by a simple manual operation from outside the panel with the panel door of the closed power distribution panel closed. It was improved and devised so that it could be moved to "position", "disconnect position", and unlocked at each position, and at the "operating position" of the power distribution equipment, the panel door was restricted to the closed position and could not be opened. The object is to provide a closed switchboard with a handle mechanism and a lock release mechanism.

In order to achieve the above object, according to the present invention, a closed switchboard with an open / close door that houses a drawer-type power distribution device, wherein the power distribution device is manually operated from outside the panel. , Equipped with a handle mechanism that moves to the “disconnect position” and a lock release mechanism that releases the lock of the power receiving and distribution device that is locked to the “operating position” and “disconnect position” from the outside of the panel In
The handle mechanism is composed of an lever lever type operation handle arranged on the front side of the panel door and a connecting rod penetrating the panel door and connecting the operation handle and the power receiving / distributing device in the panel. In addition, at the “operating position” of the power receiving / distributing device, the panel door is interlocked to be restrained to the closed position via the connecting rod (Claim 1).
Here, the connecting rod is inserted into the panel from the front of the panel door so as to be detachably coupled to the power receiving and distributing device, and a rod having a coupling head coupled to the operation handle at the front end protruding to the front of the panel door. In addition, the outer shape of the connecting head is set larger than the rod insertion hole opened in the panel door.

The lock release mechanism includes a pedal-type lock release lever that is arranged at the bottom of the panel door and protrudes from the front of the door, and a lock release lever that is connected to the lock release lever and has a tip attached to the power receiving and distribution device. It is composed of a striker opposed to the operation end (Claim 3). Specifically, the pedal type lock release lever is arranged on the back side of the panel door and is coupled to a slide substrate which is guided and supported in a vertically movable manner. The striker is hinged to the slide substrate via a biasing spring so that the tip of the striker moves following the power receiving / distributing device. ).
Furthermore, when opening the panel door of the closed panel, in order to be able to pull out the striker together with the panel door, it is juxtaposed on the slide board of the pedal type unlocking lever described above, Is provided with a stopper member that holds and holds the striker in the folded position.

According to the above configuration, the lever lever type operation handle assembled on the front surface of the panel door is manually tilted back and forth while the panel door of the closed switchboard is closed, so that the panel door penetrates. The receiving / distributing device can be pushed into the “operating position” and “disconnect position” through the connecting rod connected to the receiving / distributing device in the panel, and can be pulled out.
In addition, when the power distribution equipment is moved to the “operating position” and locked at this position, the connecting head provided at the front end of the connecting rod serves as a stopper to restrain the panel door to the closed position. Even if it is unlocked and the panel door is opened, it cannot be opened, so that an unexpected electric shock accident of the maintenance staff can be surely avoided.
In addition, the lock release mechanism of the power distribution device can be operated from the front of the panel door by using a pedal-operated mechanism that allows you to release the lock when you move the power distribution device. The handle can be operated using, and the operability is greatly improved.

Embodiments of the present invention will be described below based on the examples shown in FIGS. 1A is an internal side view of a closed switchboard in which the power distribution device is pushed into an “operating position” in the panel and locked at this position, and FIG. 1B is a diagram of the closed switchboard. Front view, FIG. 2 is a side view of the front part of the panel showing the state where the operation handle is connected to the power distribution device at the “disconnection position” in the panel and the preparation for movement to the “driving position” is prepared, FIG. FIG. 5 is a configuration diagram of a lock release mechanism installed in the panel door.
1 and 2, 1 is a closed switchboard, 2 is a single-opening panel door disposed on the front surface thereof, 3 is a cradle installed in the panel, and 3 a is a main circuit disconnecting portion disposed behind the cradle 3. 4 is a draw-out type circuit breaker (power receiving / distributing device) mounted on the cradle 3, 5 is placed on the front face of the panel door 2, and the circuit breaker 4 is set to “operating position” A and “disconnect position” B in the panel. A moving operation handle, 6 is a connecting rod connecting the operation handle 5 and the circuit breaker 4, 7 is a "running position" A, "disconnection position" B and the circuit breaker 4 is locked to the cradle 3 A lock mechanism 8 is a lock release mechanism which is provided at the lower part of the panel door and releases the lock mechanism 7 from the outside of the panel.

Here, the circuit breaker 4 puts the wheel 4a of the carriage on a rail laid on the bottom of the cradle 3 so as to guide and support it so as to be able to move to “operating position” A and “disconnect position” B. The main circuit terminal of the circuit breaker 4 is connected to the disconnecting part 3a. Further, as the lock mechanism 7 for locking and locking the circuit breaker 4 at the “operation position” A and “disconnection position” B, the circuit breaker is opposed to the lock plate 7 a provided at the bottom of the cradle 3. The carriage 4 includes an elevating lock pin 7b and a release lever 7c connected to the lock pin 7b and pulled out to the front of the circuit breaker 4.
With this configuration, when the circuit breaker 4 is moved to the “running position” A and “disconnection position” B, the lock pin 7b falls into the lock hole drilled in the lock plate 7a and the circuit breaker is locked at this position. . Further, when the release lever 7c is pushed downward from the front of the circuit breaker 4 in this locked state, the lock pin 7b rises and comes out of the lock plate 7a, whereby the lock is released and the circuit breaker 4 It becomes possible to move.

On the other hand, the operation handle 5 arranged on the front surface of the panel door 2 is a “く” -shaped lever lever, and a handle receiver provided on a concave handle mounting plate 2 a provided on the rear side of the panel door 2 at its lower end. It pivots on the seat 2b and is tilted in the direction of the arrow shown in the figure. A connecting rod 6 that connects the operation handle 5 and the circuit breaker 4 is a shaft that is attached to the front surface of the circuit breaker 4 by being inserted into the handle insertion hole drilled in the handle mounting plate 2 a from the front of the panel door 2. A rod that is detachably connected to the joint 6a and includes a connecting head 6b that is detachably connected to the operation handle 5 at the front end protruding forward of the panel door 2.
Here, the shaft joint 6a is, for example, a bayonet coupling type joint, and is connected by fitting and twisting the tip of the connecting rod 6 therein. Further, the connecting head 6b provided at the front end of the connecting rod 6 has a larger outer size than the handle insertion hole drilled in the handle mounting plate 2a. In the “driving position” A shown in FIG. The length of the connecting rod 6 is set so that 6b substantially contacts the front surface of the handle mounting plate 2a and restrains the panel door 2 at this position.

  Next, the detailed structure of the unlocking mechanism 8 will be described with reference to FIGS. In other words, the lock release mechanism 8 combines the pedal release lock release lever 8a protruding forward of the door through a square hole 2c (see FIG. 1 (b)) opened at the bottom of the panel door 2 and the lock release lever 8a. The slide board 8b is installed on the back side of the board door 2 so as to be movable up and down, and one end is hinged to the slide board 8b and the tip projects into the board so as to face the lock unlocking lever 7c of the lock mechanism 7. It consists of a lever type striker 8c. 8b-1 is a stepped bolt that guides and supports the slide substrate 8b so as to be movable up and down, 8d is a return spring (a tension spring) that lifts and urges the slide substrate 8b upward, and 8e is a striker 8c with respect to the slide substrate 8b. A hinge 8f connected so as to be rotatable in the direction of the arrow in FIG. 5 is an urging spring that drives the striker 8c to protrude into the board.

In addition, a hook-shaped stopper member 2d that holds and holds the striker 8c in the folded position that is pulled toward the door side is provided on the back surface side of the panel door so as to face the striker 8c.
The operation procedure when the circuit breaker 4 housed in the panel with the above configuration is moved between the “operation position” A and the “disconnection position” B from the outside of the panel will be described below. First, when the circuit breaker 4 carried into the panel by opening the panel door 2 of the closed switchboard 1 is pushed into the “disconnection position” B shown in FIG. 2, the lock pin 7b of the lock mechanism 7 is moved to the lock plate 7a at this position. The circuit breaker 4 falls into the lock hole and is automatically locked in this position. In this state, when the circuit breaker 2 is pushed from the “disconnection position” B to the “operation position” A and the circuit breaker 4 is connected to the main circuit in the panel, the panel door 2 is closed and the front of the door is closed. The rod end of the connecting rod 6 inserted into the panel is coupled to the shaft coupling 6a, and the connection head 6b provided at the front end of the connecting rod 6 and the operation handle 5 are connected to the front of the door to prepare for movement. Arrange (see FIG. 2). In this state, as shown in FIGS. 3 and 5, the striker 8 c of the unlocking mechanism 8 protrudes by receiving the spring force of the drive spring 8 f, and the tip of the unlocking lever 7 c is arranged at the front end of the carriage of the circuit breaker 4. It is confronted above.

  In this state, when the pedal type unlocking lever 8a protruding forward from the panel door 2 is stepped on with a foot, the striker 8c is lowered together with the slide substrate 8b, and the unlocking lever 7c is pushed down to lock. The lock pin 7b of the mechanism 7 is disengaged from the lock plate 7a, so that the lock of the circuit breaker 4 is released and becomes movable. When the pedal-type unlocking lever 8a is stepped on and placed on the operation handle 5 and pushed into the panel side, the circuit breaker 4 moves to the “operating position” A shown in FIG. When the foot is released from the lock release lever 8a, the striker 8c is lifted together with the slide substrate 8b by the spring force of the return spring 8d and is released upward from the lock release lever 7c of the lock mechanism 7 and becomes free. The lock pin 7b descends and fits into the lock hole of the lock plate 7a. As a result, the circuit breaker 4 is locked at the “operating position” A, and is connected to the main circuit in the panel via the rear disconnecting portion 3a (see FIG. 1A). ).

In the state shown in FIG. 1A in which the circuit breaker 4 is moved to the “operating position” A and locked at this position, the connecting head 6b provided at the front end of the connecting rod 6 acts as a stopper, Restrain the door 2 to the closed position. Therefore, even if the lock of the panel door 2 is unlocked, it cannot be opened, so that it is possible to prevent the occurrence of a human accident such that a maintenance person accidentally touches the charging part in the panel and gets an electric shock.
In this "operating position" A, the striker 8c of the unlocking mechanism 8 that receives the spring force of the drive spring 8f rotates to the position of the chain line in FIG. is doing.
On the other hand, when the circuit breaker 4 is moved from the “operating position” A to the “disconnect position” B in order to perform maintenance and inspection in the panel, first, the pedal type unlocking lever of the unlocking mechanism 8 is first performed in the same manner as the above operation. Depress 8a to release the lock of circuit breaker 4. Next, by pulling the operation handle 5 to the front manually, the circuit breaker 4 is moved to the “disconnection position” B in FIG. When the pedal of the lock release lever 8a is released at this position, the lock pin 7b of the lock mechanism 7 falls into the lock hole of the lock plate 7a, and the circuit breaker 4 is locked and locked at this position. On the other hand, the striker 8c of the unlocking mechanism 6 is folded back as shown in FIGS. 3 and 5, and is hooked and held by a hook-like stopper member 2a provided on the back surface of the panel door 2 at this position. . Accordingly, when the panel door 2 is opened in this state, the striker 8c is pulled out to the front of the switchboard together with the panel door while being folded, so that the striker 8c does not interfere with the subsequent work.

  In a normal state other than moving the circuit breaker 4 to the “operating position” and “disconnect position” in the panel, the handle handle 5 and the connecting rod 6 are removed from the closed switchboard 1 and stored. It is possible to leave.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the closed switchboard by the Example of this invention, (a) is the side view inside the board showing the state which pushed the power distribution equipment accommodated in the board into the "operation position", and was locked in this position. (B) is a front view of a closed switchboard Side view of the front part of the panel showing the state where the operation handle is connected to the power receiving / distributing device at the “disconnection position in the panel” of FIG. Side view showing the detailed structure and operation of the unlocking mechanism in FIG. Front view of the unlocking mechanism in FIG. Plan view corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Closed switchboard 2 Panel door 2a Handle mounting plate 2d Stopper member 3 Cradle 4 Drawer type circuit breaker 5 Operation handle 6 Connection rod 6b Connection head 7 Lock mechanism 7a Lock plate 7b Lock pin 7 c Lock release lever 8 Lock release mechanism 8a Pedal Type lock release lever 8b Slide board 8c Striker 8d Return spring 8e Hinge 8f Striker drive spring

Claims (5)

A closed switchboard with an open / close door that houses a drawer-type power distribution device, and a handle mechanism that moves the power distribution device to the “operating position” and “disconnect position” inside the panel by manual operation from outside the panel, Equipped with a lock release mechanism that releases the lock of the power receiving and distributing device locked at the “operating position” and “disconnect position” by operating from the outside of the panel.
The handle mechanism comprises a lever lever type operation handle disposed on the front side of the panel door, and a connecting rod penetrating the panel door and connecting the operation handle and the power receiving / distributing device in the panel, and A closed switchboard characterized by being interlocked so as to constrain the panel door to the closed position via the connecting rod at the “operating position” of the power distribution equipment. The closed switchboard according to claim 1, wherein the connecting rod is inserted into the panel from the front of the panel door so as to be detachably connected to the power receiving / distributing device, and is connected to the operation handle at the front end protruding forward of the panel door. A closed switchboard comprising a rod having a head, wherein the connecting head has an outer shape set larger than a rod insertion hole opened in the panel door. Closed switchboard with open / close doors that house drawer-type power distribution equipment, operating handle mechanism that moves the power distribution equipment to “running position” and “disconnect position” inside the panel by operation from outside the panel, and power distribution In what is equipped with a lock mechanism that locks the device at the "operation position", "disconnection position", and a lock release mechanism that releases the lock mechanism by operation from outside the panel,
The unlocking mechanism is a pedal-type unlocking lever that is arranged at the bottom of the panel door and protrudes from the front of the door, and the tip of the unlocking mechanism is connected to the unlocking lever and is connected to the unlocking lever operating end of the power distribution device. Closed switchboard characterized by comprising strikers facing each other. The closed switchboard according to claim 3, wherein a pedal-type lock release lever is arranged on the back side of the board door and coupled to a slide board that is guided and supported so as to be movable up and down, and the slide board is spring-biased to a lifting position. In addition, the closed switchboard is characterized in that the striker is hinged to the slide substrate through a biasing spring so that the tip of the striker moves following the power receiving / distributing device. 5. The closed switchboard according to claim 4, wherein a stopper member is provided in parallel with the slide board of the pedal-type unlocking lever, and a stopper member is provided on the back surface of the board door to hold and hold the striker in the folded position. .

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