JP2002369321A - Lock of draw out type electric apparatus unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure interlock of an electric apparatus unit in a draw out type switchboard where a draw out type electric apparatus unit is reciprocated between a test position and an operating position. SOLUTION: A lock pin 22 fixed to an electric apparatus unit 20 is inserted into the test position lock hole 25 and the operating position lock hole 26 in an interlock plate 24 at a test position and an operating position, respectively. An unlock operation shaft 30 turning through operation for moving the electric apparatus unit 20 is provided and, before the electric apparatus unit 20 is moved, the unlock operation shaft 30 is turned while resisting against a return spring. Unlock pins 34 and 35 fixed to the shaft 30 are inserted into the test position lock hole 25 and the operating position lock hole 26 to push out the lock pin 22 and, following to the movement, the unlock operation shaft 30 is reset by the return spring to return the unlock pin thus enabling insertion of the lock pin 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for an electric equipment unit in a switchboard in which an electric equipment unit provided in the switchboard is reciprocated between a test position and an operating position by a handle provided outside. .

[0002]

2. Description of the Related Art Conventionally, in order to connect / disconnect a main switchgear in a switchboard, an electrical equipment unit having a connector on the rear side is movably housed, and the electrical equipment unit is operated from outside the switchboard. In a switchboard in which the electric circuit is connected by a connector while being pushed into the operating position and the electric circuit is disconnected when pulled out to the test position, a lock is provided at a position after the movement together with a mechanism for moving the electric device unit. Must be performed, for example,
No. 0-108325.

FIG. 8 is a side view showing an outline of such a lock device, in which an electric equipment unit 20 having a connector in a switchboard 1 is moved from a test position shown by a solid line to an operation position shown by a dotted line. A connector (not shown) is connected to the bus. 2 is a handle shaft connected to a handle provided on the outside of the switchboard, 3 is a handle lever rotated by the handle shaft 2, and 4 is a pin provided at one end of the handle lever 3, and is rotatably attached to the handle shaft 2. The lever 5 is engaged with the circular hole 6 of the lever 5. Reference numeral 7 denotes a stopper provided on the frame of the switchboard, 8 denotes a rotating shaft supported by the frame of the switchboard 1, and 9 denotes an operating lever which is attached to the rotating shaft 8 so as to face the outside of the electric device unit. The groove 10 is provided, and a roller 21 provided on a side surface of the electric device unit 20 is engaged. Reference numeral 11 denotes an operation rod having one end connected to the lever 5 with a pin 12 and the other end connected to an operation lever 9 with a pin 13, which turns the operation lever 9 in accordance with the rotation of the lever 5 by operating the handle. Roller 21 into groove 10
The electric device unit 20 is moved by engaging with the inner side edge.

In the state shown in FIG. 8 in which the electric device unit 20 is pulled out to the test position in the switchboard, the open groove 1 of the operating lever 9 is opened.
0 is the forward direction of movement (left side in the figure), and the roller 21 is in contact with the receiving surface 9a of the operating lever 9 to hold the electric device unit 20 at the test position. When the handle lever 3 is rotated clockwise together with the handle shaft 2 by a handle (not shown) on the outside of the switchboard, the pin 4 moves along the arc-shaped hole 6 and the lever 5 is rotated to move the operation rod 11. The electric device unit 20 is pushed out in the direction of the arrow to rotate the operating lever 9, and the electric device unit 20 is moved to the operation position indicated by the dotted line via the roller 21 engaged with the groove 10. In this state, the pin 1 connecting the operating rod 11 and the lever 5
The position 2 is beyond the line connecting the handle shaft 2 and the pin 13 and is locked so as not to move even if a force is applied to the electric device unit 20 in the pulling-out direction.

[0005] As shown in FIG. 9, a lock pin 22 urged downward by a spring 23 to an electric equipment unit 20.
The lock pin 22 is inserted into one of the test position lock hole 25 and the operation position lock hole 26 of the interlock plate 24 provided at the fixed portion at the movement position, and the electric device unit 20 is locked at the position after the movement. A lock device is provided in which an electromagnetic device 50 is provided, the lock pin 22 is pulled up against the spring 23, and the electric device unit 20 is moved.

[0006]

However, in such a drawer-type electric device unit, as described above, the engagement state between the roller 21 and the operating lever 9 and the operation rod 1
There is a concern that the lock cannot be reliably guaranteed only by performing the mechanical interlock at the position of the one connecting pin. For this reason, even if a lock pin is attached to the electric device unit and the lock pin is operated by an electromagnetic device such as a solenoid to be inserted into the pin holes at the moving position and the operating position,
To operate this electromagnetic device, it is necessary to interface with the contactor of the electrical equipment unit, which complicates the electrical command circuit and interlock.At the time of a power failure, the electromagnetic device cannot be operated. When it is held at the operating position, it is impossible to move to the test position, which causes a disadvantage in security. The present invention provides a lock device that enables a lock pin provided on an electric device unit to be automatically released in association with operation of a handle on the outside of a switchboard.

[0007]

For this purpose, a test position lock hole and an operation position lock hole are provided in an interlock plate provided in a switchboard so as to correspond to a test position and an operation position of an electric equipment unit. The unit is provided with a lock pin to be inserted into either the test position lock hole or the operation position lock hole according to the position after the movement from above the interlock plate. Prior to the movement of the electrical equipment unit, an unlocking pin is inserted into the test position lock hole and the operation position lock hole from below, respectively, and the lock pin is pushed out of the lock hole. In order to insert the unlocking pin before the electric device unit is moved by the operating lever, the width of the groove provided in the operating lever is made larger than the diameter of the roller attached to the electric device unit, and The rotation causes a time lag between the engagement of the roller with the groove and the pushing of the roller at the groove side edge.

Further, in order to insert the unlocking pin from below the lock hole, an unlocking operation axis is provided below the interlock plate in parallel with the moving direction of the electric device unit. An unlocking pin attached to the test position lock hole and the operating position lock hole so as to move up and down via an arm, respectively, and a return spring for rotating the unlocking operation shaft in a direction to pull down the unlocking pin. The operation arm attached to one end of the unlocking operation shaft is connected to a swing lever that is engaged with a cam that rotates together with the operation lever, and the operation arm is rotated through the swing lever by the rotation of the cam. Then, the unlocking operation shaft is rotated in a direction to push up the unlocking pin against the return spring.

The operating arm is slidably mounted on one end of the unlocking operation shaft, and the unlocking operation shaft and the operation arm are connected via a torsion spring provided around the unlocking operation shaft. When a rotation torque more than a certain value is applied to the unlocking operation shaft,
By absorbing the rotational force of the operation arm by the flexure of the torsion spring,
The unlocking pin is prevented from applying a pushing force exceeding a certain value.

[0010]

FIG. 1 shows an embodiment of the present invention.
5 will be described. Reference numeral 1 denotes a switchboard, and 20 denotes an electric device unit housed in the switchboard 1, which is moved to a test position and an operation position, and is connected to a connector (not shown). 2 is a handle shaft connected to a handle (not shown) for moving the electric device unit, 3 is a handle lever that rotates with the handle shaft 2, 4 is a pin provided at one end of the handle lever 3, and 5 is a handle shaft. The pin 4 is engaged with the arc-shaped hole 6 by a lever which is freely rotatable. 7 is a stopper for lever 5, 8
Is a rotating shaft supported by the frame of the switchboard, 9 is an operating lever attached to the rotating shaft 8 on both sides of the electric device unit,
A groove 21 is provided and a roller 21 provided on a side surface of the electric device unit 20 is engaged. However, the width of the groove 10 of the operating lever 9 is made larger than the diameter of the roller 21 so that the operating lever 9 is slightly rotated. After the movement, the adjustment is performed so that the electric device unit is moved by the engagement between the roller 21 and the side edge of the open groove 10. Reference numeral 11 denotes an operation rod for moving the electric device unit 20 through the operation lever 9, and one end of the operation rod
And the other end is connected to an operating lever 9 attached to a rotating shaft 8 by a pin 13 and operated in the same manner as the conventional one shown in FIG.

Reference numeral 22 denotes a lock pin attached to the electric device unit 20, which is urged downward by a spring 23. 2
Reference numeral 4 denotes an interlock plate, which is provided with a test position lock hole 25 and an operation position lock hole 26, and is attached to the upper surface of the base 27 of the switchboard 1. Reference numerals 28 and 29 denote pin guide holes provided in the base 27 so as to face the test position lock hole 25 and the operation position lock hole 26. Reference numeral 30 denotes an unlocking operation shaft that is supported by a plurality of bearings 31 below the base 27 in parallel with the moving direction of the electric device unit 20, and is unlocked by opposing the positions of the test position lock hole 25 and the operation position lock hole 26. Lock pins 34 and 35 are provided. This unlocking pin 34 is, as shown in FIG.
A lower end is attached to an arm 32 attached to an unlocking operation shaft 30 with a pin 33, and an upper end is inserted into a pin guide hole 28. An unlocking pin 35 is similarly attached. Reference numeral 36 denotes a return spring which is engaged with the unlocking operation shaft 30 and urges the unlocking pins 34 and 35 in a downward direction (the direction of the arrow in FIG. 3).
In the figure, it is provided at two locations using a torsion spring. Reference numeral 37 denotes an operation arm attached to the end of the unlocking operation shaft 30, reference numeral 38 denotes an L-shaped swing lever for rotating the operation arm 37, which is supported by a support piece 39 of the base 27 with a pin 40, and which has a bent portion. It is connected to the operation arm 37 by a pin 41. 42
Is a cam which is attached to the rotation shaft 8 and rotates together with the operation lever 9, and is engaged with the swing lever 38.

When the electric device unit 20 is at the test position, the lock pin 22 is inserted into the test position lock hole 25 of the interlock plate 24, and the swing lever 38 is disengaged from the cam 42, and the unlock operation shaft is released. Numeral 30 pulls down the unlocking pins 34 and 35 by the return spring 36. When the handle lever 3 is turned through the handle, the operating rod 11 is operated in the direction of the arrow, and the operating lever 9 is rotated to open the groove 10.
3, the cam 42 rotates along with the rotation of the operating lever 9 to push down the swinging lever 38, and the unlocking operation shaft 30 is moved via the operating arm 37 against the return spring 36 as shown in FIG. The unlocking pins 34 and 35 connected to the respective arms 32 are rotated in the direction opposite to the
8 and 29, the unlocking pin 34 pushes the lock pin 22 from the test position lock hole 25 onto the interlock plate 24. As described above, when the lock pin 22 is pushed out of the test position lock hole 25 prior to the movement of the electric device unit 20, the electric device unit 20 can be moved, and the side edge of the groove 10 pushes the roller 21. The electric device unit 20 is moved to the operation position, and the lock pin 22 is moved.
Moves on the upper surface of the interlock plate 24.

While the electric device unit 20 moves to the operating position, the operating lever 9 rotates and tilts in the direction opposite to the state shown in FIG. 1, and the cam 42 also rotates to rotate the swing lever 3.
8 and the unlocking operation shaft 30 is returned by the return spring 36.
The electric device unit 20 that has been rotated to pull down the unlocking pins 34 and 35 and moved to the operation position is the lock pin 2
2 is inserted into the operating position lock hole 26. When moving the electric device unit 20 from the operating position to the test position,
Acts similarly.

When the electric device unit 20 is moved, the lock pin 22 is pushed up by the release pin.
Since it is securely dropped into the lock hole at the position after movement, the electric contact can be operated using the up and down movement of the lock pin, and the electric interlock can be performed during movement, improving safety during movement Let it.

FIGS. 6 and 7 show a main part of another embodiment. When the switch inside the electric device unit is closed, it is necessary to prevent the electric device unit from moving for safety. During the time when the switch is closed, the lock pin 22 is moved from the interlock plate 24. I do not remove it. However, if the user attempts to move the handle by force in this state, the electric device unit 2
Prior to the movement of 0, the unlocking operation shaft 30 is rotated to push up the unlocking pins 34 and 35, so that the unlocking operation mechanism is damaged or the electric device unit is pushed up via the lock pin. Cause an accident.

In this embodiment, such an accident is prevented, and the same parts as those in FIGS. 2 and 4 are denoted by the same reference numerals. A switch 45 and a solenoid 46 are urged when the switch 45 is closed to hold the magnetic plate 47 at the suction position (the position indicated by the dotted line in FIG. 6). 48 is a pin holder attached to the electric device unit 20 to hold the lock pin 22; 49 is a pin lever attached to the upper end of the lock pin 22; 50 is a lock lever that rotates with the pin 51; As a result, the lock pin 22 rotates with the vertical movement. Reference numeral 53 (FIG. 7) denotes a connecting pipe slidably fitted to the end of the unlocking operation shaft 30, to which an operation arm 37 is attached. 54 is a spring receiving piece provided on the connecting pipe 53, and 55 is an unlocking operation shaft 30.
, One end is connected to the unlocking operation shaft 30,
The other leg 55a is brought into contact with and engaged with the spring receiving piece 54.

When the switch 45 is opened and the magnetic plate 47 is separated from the solenoid 46 (shown by a solid line in FIG. 6), the tip 50a of the lock lever 50 is
6 and the magnetic plate 47, when the operating lever 9 is rotated by operating the handle, the cam 42 moves the swing lever 38, and the connecting pipe 53 rotates together with the operating arm 37, and the spring The unlocking operation shaft 30 is rotated via the receiving piece 54 and the torsion spring 55 to push up the unlocking pins 34 and 35, the lock pin 22 is pulled out together with the pin lever 49 from the interlock plate 24, and the electric device unit 20 is moved.

However, when the switch 45 is closed and the magnetic plate 47 is attracted to the solenoid 46 as shown by the dotted line in FIG.
7, the movement of the pin lever 49 is prevented.
Since the lock pin 22 cannot be moved even if the unlock pins 34 and 35 are pushed up, the unlock operation shaft 30 cannot rotate. In this state, if the user tries to move the electric device unit 20 by operating the handle, the operating lever 9 rotates until the opening side edge hits the roller 21, and the cam 42 also rotates through the swing lever 38. The connecting pipe 53 is rotated together with the operation arm 37, and the spring receiving piece 54 pushes the foot 55a of the torsion spring 55 to rotate the unlocking operation shaft 30, but as described above, the unlocking operation shaft 30 is rotated. Cannot rotate
The torsion spring 55 flexes to absorb the rotation of the operation arm 37,
The transmission torque to the unlocking operation shaft 30 is reduced to a certain value or less, and the movement of the electric device unit 20 is prevented without applying an excessive pushing force to the unlocking operation shaft 30 and the lock pin 22. If the movement of the electric device unit is prevented, the cam 8 cannot rotate together with the operation lever 9, and no force greater than the above-described bending is applied to the torsion spring 55.

[0019]

As described above, according to the present invention, an interlock plate having a test position lock hole and an operation position lock hole corresponding to a test position and an operation position of an electric device unit is provided in a switchboard. A lock pin inserted into the lock hole of the interlock plate at the test position and the operation position, and when the electric device unit is moved, the test position lock hole is provided before the electric device unit is moved. Since the lock pin is pushed out of the lock hole by the unlocking pin inserted into the operation position lock hole, the interlock between the test position and the operation position of the electric device unit is operated by operating the handle outside the switchboard. To be securely unlocked before moving, and locked from outside the switchboard if necessary without being affected by a power failure. It is possible to perform the movement of the release and the electric device units, interlock at the position after the movement can also be performed reliably.

When the electric equipment unit is moved, the lock pin is pushed up by the release pin, and is securely dropped into the lock hole at the position after the movement. Therefore, the electric contact is made using the vertical movement of the lock pin. Operation and electrical interlock at the time of movement can be performed, and the effect of improving safety during movement can be obtained.

The unlocking operation shaft and the operating arm for rotating the unlocking operation shaft are not directly connected but are connected via a torsion spring so that the rotation torque applied to the unlocking operation shaft is constant. If the value is exceeded, the rotation of the operation arm is absorbed by the bending of the torsion spring, so that excessive torque is not applied to the unlocking operation shaft, and the unlocking mechanism is damaged and the lock pin is forcibly pushed up, and the lock pin is pushed up. Accidents such as damage to the equipment and lifting of the electrical equipment unit.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a side sectional view showing a configuration example of a release pin.

FIG. 4 is an explanatory diagram showing an operation of an unlocking operation axis.

FIG. 5 is a side view taken along line AA of FIG. 4;

FIG. 6 is a side sectional view of a lock pin portion, showing a main part of another embodiment.

FIG. 7 is an explanatory view showing a connecting portion of an unlocking operation shaft in the embodiment of FIG. 6;

FIG. 8 is a side sectional view of a main part showing a conventional example.

FIG. 9 is a side sectional view showing another lock device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 switchboard 2 handle shaft 3 handle lever 8 rotating shaft 9 operating lever 10 groove 11 operating rod 20 electric device unit 22 lock pin 24 interlock plate 25 test position lock hole 26 operating position lock hole 28, 29 pin guide hole 30 solution Lock operation shaft 32 Arm 34, 35 Unlocking pin 36 Return spring 37 Operation arm 38 Swing lever 42 Cam 45 Switch 46 Solenoid 47 Magnetic plate 49 Pin lever 50 Lock lever 53 Connecting pipe 54 Spring receiving piece 55 Torsion spring

Claims (4)

[Claims] 1. A handle provided outside a switchboard to move an electric device unit in the switchboard to a test position and an operation position, an operating lever attached to a rotating shaft provided in the switchboard, and operation of the handle. An operation rod for rotating the operation lever and attached to the side of the electric device unit,
A switchboard provided with a roller engaged with the operating lever and for moving and holding the electric equipment unit to one of a test position and an operating position depending on the engagement state of the roller and the operating lever. On the lock plate,
A test position lock hole and an operation position lock hole corresponding to the test position and the operation position of the electric equipment unit are provided, and the test position lock hole and the operation position lock hole of the interlock plate are provided in the electric equipment unit in accordance with the movement position. And a lock pin inserted into any one of the test position lock hole and the operation position lock hole in the opposite direction to the lock pin prior to the movement of the electric device unit with the rotation of the operating lever by the handle. A lock device for a drawer-type electric device unit, comprising an unlocking pin that is inserted from a lock hole and pushes out a lock pin from a lock hole. 2. The apparatus according to claim 1, wherein the actuating lever has an opening for engaging the roller and moving the electric device unit. The width of the opening is larger than the diameter of the roller. 2. The lock device according to claim 1, wherein the unlocking pin pushes out the lock pin before the edge is engaged with the roller to move the electric device unit. 3. An unlocking operation shaft is provided below the interlock plate in parallel with the moving direction of the electric device unit, and the unlocking operation shaft corresponds to a test position lock hole and an operation position lock hole. An unlocking pin that moves up and down via an arm is attached, a return spring that rotates the unlocking operation shaft in a direction to pull down the unlocking pin is provided, and an operation arm is attached to one end of the unlocking operation shaft. A swing lever, which is engaged with a cam that rotates together with the operation arm, is connected to the operation arm, and the rotation of the operation lever causes the operation arm to rotate the unlocking operation shaft in a direction to push up the unlocking pin against the return spring. 3. The lock device for a drawer-type electric device unit according to claim 1, wherein the lock device is moved. 4. An unlocking operation shaft is provided below the interlock plate in parallel with the moving direction of the electric device unit, and the unlocking operation shaft corresponds to a test position lock hole and an operation position lock hole, Each is provided with an unlocking pin that moves up and down via an arm, and has a return spring that surrounds the unlocking operation shaft and turns the unlocking pin in a downward direction, and a torsion spring is provided at one end of the unlocking operation shaft through a torsion spring. The operation arm is attached, and a swing lever engaged with a cam that rotates together with the operation lever is connected to the operation arm, and the rotation of the operation lever unlocks the operation shaft through a torsion spring. 3. The draw-out type electric device according to claim 1, wherein the rotation of the operation arm is absorbed by bending of the torsion spring when the rotation torque applied to the unlocking operation shaft exceeds a predetermined value by rotating the pin in a direction to push up. Equipment unit Equipment.