JPH07274324A - Interlock mechanism for control circuit connector in draw out type machine - Google Patents

Abstract

PURPOSE:To provide an interlock mechanism in which the connector of control line can not be removed when a machine is in the operating position and the machine can be pushed into the operating position only when the connector is connected. CONSTITUTION:When a machine body 1 is at an operating position, an interlock pin 15 strikes against an interlock plate 30 to block lowering of a slide plate 14 which thereby engages with a protrusion 7 of a connector 3 thus preventing removal of the connector 3. When the machine body 1 is a disconnecting position, the pin 15 does not strike against the plate 30 and thereby the slide plate 14 descends to release an engaging piece 7. When the connector 3 is drawn out along with a protrusion 8, a rod 13 advances and a pin 24 descends to interfere with the plate 30 thus blocking push-in of the machine body 1. When the connector 3 is connected, the pin 15 and the slide plate 14 are lowered to clear the front side of the engaging piece 7. Upon insertion of the connector 3, the slide plate 14 returns to engage with the piece 7 thus preventing removal of the connector 7. At the time of insertion, the protrusion 8 pushes a rod 23 to place the pin 24 on the plate 30 and then the machine body 1 is pushed into an operating position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlock mechanism for a control circuit connector in a drawer type equipment such as a drawer type vacuum circuit breaker.

[0002]

2. Description of the Related Art A conventional drawer type vacuum circuit breaker is housed in a case so as to be movable in the front-rear direction, disconnected from a main circuit at a front withdrawal position, and connected to a main circuit at a rear withdrawal position. Has become. Then, the main circuit power is shut off and turned on by the control signal. A connector is provided at the end of the control line for sending the control signal to the vacuum circuit breaker, and is detachable from the corresponding connector on the vacuum circuit breaker side.

[0003]

In the equipment such as the conventional drawer type vacuum circuit breaker described above, when the equipment itself or equipment is maintained or inspected, the equipment is pulled out from the case and disconnected from the main circuit. It is necessary to pull out the control line connector.

However, in the conventional drawer type equipment, the control line connector can be pulled out even when the equipment is pushed into the case and is in the operating position where it is connected to the main circuit. If the control line connector is accidentally pulled out in this state, there is a problem that the required operation of the device cannot be performed, such as a trip operation at the time of a short-circuit accident, and the role of the device cannot be fulfilled.

Therefore, according to the present invention, the control line connector cannot be pulled out when the device is in the operating position in which the device is pushed into the case, and the device must be in the case where the control line connector is not connected. It is an object to provide a mechanism for a mechanical interlock between the device and the connector of the control line so that it cannot be pushed in.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a drawer type device 41 such as a vacuum circuit breaker, via a pair of connectors 3 and 4 to which control signals are detachable. In the input, one connector 4 is attached to the device main body 1, and the other connector 3 connected to the control line 2 is provided with an engaging piece 7 and a projecting piece 8 extending in the insertion direction. Is provided with a shielding member 13, and the shielding member 13 blocks the pre-insertion of the connector 3 by abutting the engagement piece 7, and engages with the engagement piece 7 after the insertion to restrain it. The engaging member 2 is attached to the case 42 so that it can move freely between the open position and the open position where it is inserted, and it can be manually moved to the open position.
9, the engaging member 29 contacts the shield member 13 when the device body 1 is in the push-in position to prevent its movement to the open position, and when the device body 1 is in the pull-out position. Is arranged so as to allow the movement of the shielding member 13 to the open position, and further, the device body 1 is provided with a lock member 22, and the lock member 22 is engaged with the engaging member 29 to push the device body 1 inward. The original position that prevents movement to the position,
The connector 3 is disengaged from the engagement member 29 and is allowed to move between the disengaged position that allows the device body 1 to move to the pushing position, and is biased toward the original position.
When the device main body 1 is in the pull-out position, the pair of connectors 3 and 4 can be connected and disconnected only when the device main body 1 is in the pull-out position. The interlock mechanism of the control circuit connector in the drawer type device is configured so that the device body 1 cannot be moved to the push-in position without connecting the connectors 3 and 4.

[0007]

In the drawer type equipment to which the present invention is applied, the connectors 3, 4 must be moved unless the shielding member 13 is moved to the open position.
Can not be attached or detached. The device body 1 is the case 4
When it is in the operating position in which it is pushed into 2, the shielding member 13 abuts on the engaging member 29 of the case 42, so that it cannot be moved to the open position. Therefore, the mounted control line side connector 3 cannot be pulled out from the corresponding connector 4 of the device. When the device body 1 is in the disconnection position where it is pulled out from the case 42, the shielding member 13 is in a position where it does not contact the engaging member 29 of the case 42, so it can be manually moved to the open position. it can. When the shielding member 13 is moved to the open position, the engagement piece 7 of the connector 3 is released, so that the connector 3 can be pulled out from the corresponding connector 4. When the connector 3 is pulled out, the projecting piece 8 is also pulled out, so that the lock member 22 returns to the original position and comes to a position where it abuts on the engaging member 29 of the case 42. Therefore, with the connector 3 pulled out,
When the device body 1 is pushed into the case 42, the lock member 22 comes into contact with the engaging member 29 of the case 42, and this is prevented. When pushing the device body 1 into the case 42, the connector 3 must be connected. When connecting the connector 3, first, the shielding member 13 is manually operated.
To the open position. As a result, the front of the engaging piece 7 of the connector 3 is released, so that the connector 3 is inserted into the corresponding connector 4. When the hand is released from the shielding member 13 after the connector 3 is inserted, it returns to its original position and engages with the engaging piece 7 to prevent the connector 3 from coming off. By the inserting operation of the connector 3, the protruding piece 8 of the connector 3 moves the lock member 22 to the release position. At this position, the lock member 22 is disengaged from the engaging member 29 of the case 42, so that the device body 1 can be pushed into the case 42 for the first time without any trouble. After all, the pair of connectors 3 and 4 can be connected and disconnected only when the device body 1 is in the pull-out position, and the device body 1 can be moved to the push-in position without connecting the pair of connectors 3 and 4. Can not. For this reason, when the device body 1 is in the operating position, the connector 3 of the control line 2 is reliably prevented from being disconnected.

[0008]

An embodiment of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of the interlock mechanism portion when the device body is in the pull-out position, FIG. 2 is a front view of the interlock mechanism portion when the device body is in the pull-out position, and FIG. 3 is a view of the device body in the pull-out position. And FIG. 5 is a front view of the interlock mechanism portion when the slide plate is pushed down, and FIG. 4 is a front view of the interlock mechanism portion when the device body is in the pull-out position and the slide plate is pushed down. FIG. 6 is a cross-sectional view of the interlock mechanism portion when the main body is in the operating position, FIG. 6 is a front view of the interlock mechanism portion when the device main body is in the operating position, FIG. 7 is a perspective view of the connector holder, and FIG. FIG. 9 is an overall front view of the device, and FIG. 9 is an overall side view of the drawer-type device.

In the illustrated embodiment, the present invention is a drawer type device 4
It is applied to the vacuum circuit breaker which is 1. 8 and 9
As shown in FIG. 4, the drawer type device 41 is housed in the case 42 so as to be movable in the front-rear direction, is disconnected from the main circuit in the front pull-out position, and is connected to the main circuit in the rear push-in position. There is. Then, the main circuit power is shut off and turned on by the control signal. A connector 3 is provided at the end of a control line 2 that sends a control signal to the device body 1, and is detachably attached to a corresponding connector 4 on the device body 1 side.

The connector 3 comprises a connector body 5 connected to the control line 2 and a holder 6 for holding the connector body 5. As shown in FIGS. 1, 3, and 7, the holder 6 includes an engaging piece 7 and a protruding piece 8 extending in the insertion direction of the connector 3.
The engaging pieces 7 are provided at the side edges of the four corners, and each of the engaging pieces 7 has an engaging portion 9 protruding downward at the tip end side. The projecting piece 8 is provided at the lower edge and extends horizontally.

The connector 4 is attached to the front side of the device body 1. The front plate 10 of the device body 1 has a slit 11 which is a first opening for inserting the engaging piece 7 of the connector 3 and a slit 12 which is a second opening for inserting the protruding piece 8. Has been done. A shield member 13 for allowing or blocking the insertion of the connector 3 is provided on the rear surface side of the front plate 10 so as to be vertically movable.

The shield member 13 which opens and closes the slit 11 of the front plate 10 comprises a slide plate 14 and a first interlock pin 15 which is vertically fixed to the center thereof.
The slide plate 13 is supported by the guide member 16 and is provided so as to be vertically movable together with the interlock pin 15, and is biased by the spring 17 toward the upper original position. The slide plate 14 has a substantially rectangular frame shape, and has a rectangular opening 18 in the center, and shield projections 19 protruding laterally at the upper and lower sides of the left and right sides. As shown in FIGS. 1 and 2, the shielding projection 19 is located on the back side of the slit 11 and shields the sliding plate 13 when the slide plate 13 is in the upper original position. Although the insertion is prevented, as shown in FIGS. 3 and 4, when the slide plate 13 is in the lower position, the slit 11 is opened to allow the engagement piece 7 to be inserted. In addition, as shown in FIG. 5 and FIG.
The engaging piece 7 inserted into the slit 11 when the
Engages with the engaging portion 9 to restrain this. The opening 18 is
Regardless of the position of the slide plate 13, the slit 12 of the front plate 10 is opened, and the insertion of the projecting piece 8 of the connector 3 is allowed. The protruding piece 8 is provided with a notch 20 for avoiding the interlock pin 15 at the time of insertion. The slide plate 13 can be moved up and down by operating the handle 21 of the interlock pin 15 from the front side.

A lock member 22 for controlling permission / prohibition of movement of the device body 1 to the operating position is provided on the device body 1 at the back side of the slide plate 13. Lock member 22
Includes a cam rod 23 and a second interlock pin 24 interlocked with the cam rod 23.

The cam rod 23 is horizontally supported in the front-rear direction by a frame 25 fixed to the device body 1, is reciprocally movable in the axial direction, and is always urged by a spring 26 toward the front original position. . The front end surface of the cam rod 23 is disposed on the back side of the slit 12 of the front plate 10 and can be pushed back by the projecting piece 8 of the connector 3 inserted into the slit 12. The cam rod 23 includes a cam surface 27 that is inclined forward and upward.

The interlock pin 24 is vertically supported by a frame 25 so as to be vertically movable, and has a cam roller 28 at its upper end. The cam roller 28 is rotatably mounted on the cam surface 27 of the cam rod 23. Therefore, the interlock pin 24 is always in the lower original position by its own weight, but the cam rod 23 does not move the protrusion 8 of the connector 3.
When it is pushed back to and retracted, it is pushed up by the cam surface 27 and rises, and the engagement of the case 42 with the engagement member 29 is released.

The engaging member 29 comprises an interlock plate 30 which is horizontally provided on the bottom plate of the case 42 with a space therebetween. The interlock plate 30 has two interlock pins 1
It is located below 5, 24. Interlock plate 30
As shown in FIGS. 5 and 6, when the device body 1 is in the push-in position, it abuts on the lower end of the interlock pin 15 to prevent the interlock pin 15 from descending, and as shown in FIGS. , When the device body 1 is in the pulling-out position, it is disengaged from the lower position of the interlock pin 15 and is allowed to descend. Also, at this position, the interlock pin 24 in the lowered position is
It abuts the lower side surface of the device to prevent the device body 1 from moving to the pushing position. As a result, the device main body 1 is shown in FIGS.
Only when in the pull-out position shown in
4 can be connected and disconnected, and it is impossible to move the device body to the push-in position without connecting the pair of connectors 3 and 4.

In the drawer type device of this embodiment, the connectors 3 and 4 cannot be attached or detached unless the shielding member 13 is lowered to the lower open position. Now, as shown in FIGS. 5 and 6, when the device body 1 is in the operating position in which it is pushed into the case 42, when the handle 21 is picked up and the shield member 13 is attempted to be lowered, the interlock pin 15 This cannot be done because the lower end of the abuts against the interlock plate 30 of the engagement member 29. Therefore, the shielding projection piece 19 of the slide plate 14 cannot be disengaged from the engaging piece 7 of the connector 3, so that the mounted connector 3 cannot be pulled out from the connector 4 on the device body side.

As shown in FIGS. 1 and 2, the device body 1 is
In the disconnection position pulled out from the case 42,
Since the interlock pin 15 of the shielding member 13 is at a position separated from the interlock plate 30, it can be manually lowered. When the interlock pin 15 is lowered, the slide plate 14 is lowered integrally therewith, and the shielding projection piece 19 thereof is disengaged from the engagement piece 7 of the connector 3,
The connector 3 can be pulled out from the corresponding connector 4. When the connector 3 is pulled out, the projecting piece 8 is also pulled out, so that the cam rod 23 of the lock member 22 is restored to the original position at the front, the cam roller 28 descends the cam surface 27, and the interlock pin 24 descends to interlock. It comes to a position where it abuts the edge of the plate 30. Therefore, if the device body 1 is pushed into the case 42 with the connector 3 pulled out, the interlock pin 24 of the lock member 22 abuts against the edge of the interlock plate 30, which is prevented.

Before pushing the device body 1 into the case 42, the connector 3 must be connected. To connect the connector 3, as shown in FIGS. 3 and 4, first, manually push down the interlock pin 15,
The slide plate 14 is lowered to the open position. As a result, the shielding projection piece 19 is disengaged from the slit 11 and the insertion part of the engagement piece 7 of the connector 3 is released, so that the engagement piece 7 corresponds to the slit 11 and the projection piece 8 corresponds to the slit 12. hand,
Insert the connector 3 into the corresponding connector 4. When the connector 3 is inserted and the hand is released from the handle 21 of the interlock pin 15, the slide plate 14 is returned to the upper original position by the spring 17, the shielding projection piece 19 is engaged with the engagement piece 7, and the connector 3 is attached. Prevent it from coming off (Figs. 5 and 6). By the inserting operation of the connector 3, the protruding piece 8 of the connector 3 pushes the cam rod 23 rearward, pulls up the interlock pin 24, and arranges it above the interlock plate 30 (state shown in FIGS. 5 and 6). Since the interlock pin 24 is disengaged from the interlock plate 30 at this position, the device body 1 can be pushed into the case 42 for the first time without any trouble.

After all, the pair of connectors 3 and 4 can be connected and disconnected only when the device body 1 is in the pull-out position, and this operation cannot be performed in the operating position. Further, it is impossible to push the connector body 3 into the operating position without connecting the connector 3 to the device body 1 in the pulling-out position. Therefore, it is possible to reliably prevent the control line 2 from being disconnected when the device body 1 is in the operating position.

The present invention is not limited to the illustrated embodiment, and for example, in addition to the vacuum circuit breaker, a switching switch,
The present invention can be applied to other various drawer-type devices, and the concrete shapes and structures of the connector 3, the shielding member 13, the lock member 22, the engaging member 29, etc. are different from those of the other shapes and structures performing the same operation. Can be replaced.

[0022]

As described above, in the present invention, in the drawer type device 41 such as the vacuum circuit breaker, in which the control signal is inputted through the pair of detachable connectors 3 and 4, One connector 4 is attached to the device body 1, the other connector 3 connected to the control line 2 is provided with an engaging piece 7 and a projecting piece 8 extending in the insertion direction, and the device body 1 is provided with a shielding member 13. The shield member 13 abuts on the engagement piece 7 to shield the insertion before insertion of the connector 3, and also engages with the engagement piece 7 after insertion to restrain it and the opening position at which the insertion insertion is opened. It is movable between the position and the original position, and it can be moved to the open position manually.
The case 42 is provided with an engaging member 29, and the engaging member 29
Is in contact with the shield member 13 when the device body 1 is in the pushing position to prevent the device body 1 from moving to the open position, and when the device body 1 is in the pulling position, the shield member 13 moves to the open position. It is arranged so as to allow movement, and further, the device body 1 is provided with a lock member 22.
Between an original position that engages the engaging member 29 to prevent the device body 1 from moving to the pushing position, and a release position that is released from the engaging member 29 to allow the device body 1 to move to the pushing position. Is movable and biased toward the original position, and when the connector 3 is inserted into the connector 4, the protruding piece 8
The pair of connectors 3 and 4 can be connected and disconnected only when the device body 1 is in the pull-out position, without being connected to the pair of connectors 3 and 4. Since the interlock mechanism of the control circuit connector is configured so that the device body 1 cannot be moved to the push-in position, when the device body 1 is in the operating position pushed into the case 42, the connector of the control line 2 is provided. Three
Cannot be pulled out, and the device main body 1 cannot be pushed into the case 42 unless the connector 3 of the control line 2 is connected, so that the safety of the main circuit can be ensured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an interlock mechanism portion in a state where a device body is in a withdrawn position.

FIG. 2 is a front view of the interlock mechanism portion in a state where the device body is in a pull-out position.

FIG. 3 is a cross-sectional view of the interlock mechanism unit in a state where the device body is at the pull-out position and the slide plate is pushed down.

FIG. 4 is a front view of the interlock mechanism unit in a state where the device body is in the pull-out position and the slide plate is pushed down.

FIG. 5 is a cross-sectional view of the interlock mechanism portion when the device body is in the operating position.

FIG. 6 is a front view of the interlock mechanism portion in a state where the device body is in the operating position.

FIG. 7 is a perspective view of a connector holder.

FIG. 8 is an overall front view of the drawer type device.

FIG. 9 is an overall side view of the drawer type device.

[Explanation of symbols]

 1 Device Main Body 2 Control Line 3 Connector 4 Connector 6 Holder 7 Engaging Piece 8 Projecting Piece 9 Engaging Piece 10 Front Plate 11 Slit 12 Slit 13 Shielding Member 14 Slide Plate 15 Interlock Pin 17 Spring 19 Shielding Protrusion 22 Locking Member 23 Cam rod 24 Interlock pin 26 Spring 30 Interlock plate 41 Draw-out type device 42 Case

Claims (4)

[Claims] 1. A case is housed so as to be movable back and forth,
A drawer-type device that disconnects from the main circuit in the front pull-out position, is connected to the main circuit in the rear push-in position, and performs operations such as switching and shutting off the main circuit power supply in response to a control signal. In what is input via a pair of detachable connectors, one of the pair of connectors is attached to a device body,
The other connector is provided with an engagement piece that is connected to the control line and extends in the insertion direction into the one connector, and the device main body is in contact with the engagement piece and is provided with a way of inserting the other connector. It is movable between the original position where it blocks and engages the engaging piece after insertion and restrains it, and the open position where it opens before insertion, and it is biased toward the original position and moved to the open position manually. A possible shielding member is provided, and when the device body is in the pushing position, the case is in contact with the shielding member to prevent the device body from moving to the open position, and the device body is in the withdrawal position. An engagement member that allows the shield member to move to the open position is provided, and the pair of connectors can be connected and disconnected only when the device body is in the pull-out position, and the device body is in the push position. A pair of connectors when Interlock mechanism of the control circuit connector at the drawer-type device, wherein the withdrawal is not possible. 2. A case is housed so as to be movable back and forth,
A drawer-type device that disconnects from the main circuit in the front pull-out position, is connected to the main circuit in the rear push-in position, and performs operations such as switching and shutting off the main circuit power supply in response to a control signal. In what is input via a pair of detachable connectors, one of the pair of connectors is attached to a device body,
The other connector is provided with a projecting piece that is connected to the control line and extends in the insertion direction into the one connector, and the device body is engaged with the engaging member of the case to a pushing position of the device body. Is movable between an original position for preventing the movement of the connector and a release position for allowing the device body to move to the pushing position by being released from the engaging member, and is biased toward the original position and the other connector. A lock member that is pushed by the projecting piece and moves to the release position when the connector is inserted into the one connector, and the device body cannot be moved to the push position without connecting the pair of connectors. An interlock mechanism for the control circuit connector in the drawer type device. 3. A case is housed movably back and forth,
A drawer-type device that disconnects from the main circuit in the front pull-out position, is connected to the main circuit in the rear push-in position, and performs operations such as switching and shutting off the main circuit power supply in response to a control signal. In what is input via a pair of detachable connectors, one of the pair of connectors is attached to a device body,
The other connector includes an engaging piece and a projecting piece that are connected to the control line and extend in the insertion direction into the one connector, and the device body contacts the engaging piece and the other connector. Is blocked between the insertion front and the original position where it engages with the engaging piece after insertion to restrain it and the open position where the insertion is released, and it is biased toward the original position and manually A shielding member movable to the open position is provided, and the case contacts the shielding member when the device body is in the pushing position to prevent the device body from moving to the open position. An engaging member is provided that allows the shield member to move to the open position when in the pull-out position, and further, the device body is engaged with the engaging member to prevent the device body from moving to the push-in position. The original position to block and the device body released from the engagement member It is movable between a release position that allows it to move to the push-in position, is biased toward the original position, and is released by being pushed by the projecting piece when the other connector is inserted into the one connector. A lock member that moves to a position is provided, and the pair of connectors can be connected and disconnected only when the device body is in the withdrawal position. The device body can be moved to the push-in position without connecting the pair of connectors. An interlock mechanism for a control circuit connector in a drawer type device, which is not possible. 4. One of the pair of connectors is attached to the front side of the device main body, and the other connector is a protrusion extending in the insertion direction into the one connector, and also extending in the insertion direction, An engaging piece having an engaging portion protruding downward on the tip side, and first and second parts for inserting the protruding piece and the engaging piece of the other connector on the front side of the device body. A front plate having an opening is provided, and the shielding member includes a slide plate provided on the rear surface side of the front plate so as to be vertically movable, and a first interlock pin vertically fixed to the slide plate. This slide plate is provided with the second plate of the front plate when it is in the upper original position.
The second opening when the lower opening position is closed and the second opening is opened at the lower opening position, and the engaging portion of the engaging piece inserted into the second opening is engaged to prevent the retainer from coming off. The engaging member includes an interlock plate that is horizontally provided at a bottom portion of the case with a space between the engaging member and the interlock plate when the device body is in the pushing position. It contacts the lower end of the first interlock pin to prevent the interlock plate from descending to the open position, and when the device body is in the pull-out position, it disengages from the lower position of the first interlock pin and the interlock The lock member is arranged so as to allow the plate to descend to the open position, and the lock member has a front end portion so that the lock member can be pushed back by the projecting piece of the connector inserted into the first opening of the front plate. Place it behind the first opening and move forward and backward. The cam rod is movably and urged forward to be mounted on the equipment body, and the cam surface of the cam rod is raised so that it rises when the cam rod retracts, so that the equipment can move vertically in the equipment body. In the original position where it is provided and lowered, the lower part collides with the interlock plate to prevent the device body from moving to the push-in position, but at the raised release position, it disengages from the interlock plate and moves to the device body push-in position. The interlock mechanism of the control circuit connector in the drawer type equipment according to claim 3, further comprising a second interlock pin that allows movement of the control circuit connector.