JPH0334226A - Operating mechanism of interlock switch - Google Patents

Abstract

PURPOSE:To eliminate breakdown by erroneous operation by providing first and second operating shafts, a mechanical locking means, a shutter for blocking the rotating operations of the operating shafts, and an electric locking means. CONSTITUTION:To connect a contact 2 with a terminal 3, a button 11 is pushed, a solenoid 10 is driven to remove a blocking plate 29. A selection lever 24 is moved in the direction C to advance a limiting plate 28, the locking of a projection 28a to the projection 23a of a rotation regulating plate 23 is released, and the locking with 23b is held. A shutter 30 eliminates partitioning toward the first operating shaft 4. When shaft 4 is rotated counterclockwise, the upper end projection of the plate 23 is stopped by the contact with the projection 28a, whereby the connection is completed. To return the contact to neutral, the shaft 4 is reversely rotated, and the projection 23b is locked by 28a and stopped. The lever 24 is returned to its neutral, and the button 11 is pushed to return a plunger 9. The connection to a contact 3b and the return to neutral are curried out by the similar operations such as rotations of plunger 10 and the lever 24 in the direction D, rotation of a shaft 21, and others. According to this constitution, the installation is facilitated, and erroneous operation is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating mechanism for a three-position switching switch used in a switching device such as a cubicle or a cubicle type gas-insulated switchgear.

(Prior Art) FIG. 2 is a perspective view showing the operating mechanism of a conventional three-position switching switch. In the figure, 1 is a three-position switching switch schematically shown, and the movable contact 2 is in the middle off position in the figure,
The fixed contacts 3a and 3b are switched and rotated.

Reference numeral 4 denotes an operating shaft rotatably supported by a bearing 6 fixed to the partition plate 5, the tip of which is connected to the movable contact 2.
Rotate the switch. A rotation regulating plate fixed to the operating shaft 4 is provided with a clockwise guide groove 7b having a larger radius from the intermediate position groove 7a and a counterclockwise guide groove 7c having a smaller radius.

8 is a selection lever whose tip is supported by the partition plate 5 via a support means (not shown) and can be rotated horizontally in the directions of arrows A and B. 9 and 10 are rotation operations of the selection lever 8. A pair of electromagnetic solenoids 9 and 10, which perform electrical interlock, lock the selection lever 8 at the intermediate operating position by the protrusion of the granger 9a and 10a, and by suction and lowering of the granger 9a,
A rotational operation in the A direction is made possible, and a rotational operation in the υB force direction is made possible by sucking and lowering the plunger 10a. 11 and 1
2 is a push button switch, interlock signal wiring 1
3 are connected in series to magnetic solenoids 9 and 10, respectively.

Next, the operation will be explained. Depending on external interlock conditions, an electrical signal is applied via wiring 13 to either or both of the electromagnetic solenoid 9-push button switch 11 circuit and the electromagnetic solenoid 10-push button switch 12 circuit. For example, if an electrical signal is given to the electromagnetic solenoid 9-push button switch 11 circuit, when the push button switch 11 is pressed, the electromagnetic solenoid 9
energized, the plunger 9a is attracted and lowered. This makes it possible to rotate the selection lever 8 in the direction of arrow A, and when the selection lever 8 is manually rotated in the same direction, the selection lever 8 moves from the intermediate position fi7a to the guide #7b side. Therefore,
When an operating handle (not shown) is inserted into the rear end of the operating shaft 4 and rotated counterclockwise, the operating shaft 4 is rotated to an angle determined by the shape of the guide #47b. Then, the movable contact 2 of the switching switch 1 comes into contact with the fixed contact 3aK and is switched.In addition, the same procedure as above is used to switch from the contact position to the fixed contact 3a to the intermediate disconnection position. This is done by rotating the operating shaft 4 clockwise using the operating handle.

In addition, when the movable contactor 2 is in the intermediate position and the electric M number is given to the electromagnetic solenoid 10 - push button switch 12 circuit, when the push button switch 12 is pressed,
The electromagnetic solenoid 10 is energized and the plunger 10a descends. Then, when the selection lens 8 is rotated in the direction of arrow B, it is moved from the intermediate position groove a to the guide @7b side. Therefore, the operation shaft is rotated clockwise using the operation 71 to bring the movable contact 2 into contact with the fixed contact 3a.

[Problem to be solved by the invention]

In the conventional switching switch operation mechanism as described above, the movable contact 2 of the switching switch 1 is switched between three positions by one operation rotation, and the rotation of the operating shaft 4 in the direction of the sleeve is performed. This poses a problem in that the switch can be switched to any two of the three positions of the II switching opening/closing 61 by dynamic operation, and the operator is likely to make an erroneous operation. In addition, there are problems such as forcibly performing an operation prohibited by the interlock, which may cause the mechanism to malfunction, and furthermore, such an operation may cause a short circuit accident in the external circuit of the switching switch 1. there were.

This invention was made to solve these problems, and provides a switching switch that is easy to operate, eliminates operator errors, and prevents malfunctions and accidents caused by forced operation. The purpose is to obtain an operating mechanism for the

[Means to solve the problem]

The operation mechanism of the switching switch according to the present invention provides an a
The change rotation is performed using the first operating axis, and the intermediate position and pond direction 1 are
The turning movement between the feed and the feed is transmitted through the first operating shaft by the eye movement operation of the second operating shaft, and via the S machine gripping locking means depending on the rotational position of the selection lever. The first operation shaft is either locked at the intermediate rotational position, rotation between the intermediate position and one position is enabled, or rotation between the intermediate position and the other position is disabled. Also, depending on the rotating position of the selection lever, the sand shutter can be set to the first position. The other end of the second operating shaft is partitioned to prevent rotational operation, or the other end of the second operating shaft is partitioned to prevent rotational operation, or the other end of the first operating shaft is partitioned to prevent rotational operation. ``I try to prevent the rotation operation of the partition.

Further, the rotation of the selection lever is locked by the electric locking means, and only when a signal indicating the conditions for switching to a predetermined switching position is received, the rotation of the selection lever to the corresponding side for switching to that position is prevented. It was designed to be released.

[Effect]

In this invention, when the movable contact of the switching switch is in the intermediate position, the first operation shaft is in the intermediate rotation position, the selection lever is in the intermediate rotation position, and the mechanical locking means is in the intermediate rotation position. This locks the first operating shaft. Further, the shutter prevents the operating handle from being inserted into the second operating shaft, and the selection lever is locked by an electrical locking means.

When the conditions for switching to one of the switching positions are met, the signal enters the electrical locking means, and when an electrical operation is performed to release the electrical lock to the side to be switched to that position, the electrical locking to the one position side of the selection lever is performed. The lock will be released. Rotating the selection lever to that side allows rotation of the first operating shaft to one side, and the shutter releases the partition on the first operating shaft and maintains the partition on the second operating shaft. Therefore, insert the operation 71 handle into the other end of the first operation shaft, rotate it to one side, and switch the movable contact to the single-force position.0 With the movable contact in the intermediate position, move it to the other switching position. When the conditions are met and the signal enters the electrical locking means, the electrical lock on the other side of the selection lever is released by performing an electrical operation to release the electrical lock on the other side.
When the selection lever is rotated to the other side, the first operating shaft can be rotated to the other side, and the shutter releases the partition of the second operating shaft and maintains the partition of the first operating shaft. do. Therefore, when the operating handle is inserted into the other end of the second operating shaft and rotated to the other side, the first operating shaft is rotated to the other side in conjunction with this. This switches the movable contact to the other position.

In this way, the first and second operating shafts can be rotated by the operating handle only when the conditions for switching operation are met, and the first operating shaft is used for switching between the intermediate position and one position. The second operating shaft is used for switching between the intermediate position and the other position, making the operation easy for the operator to understand and preventing erroneous operation.

〔Example〕

FIG. 1 is a main configuration diagram showing a switching/switching switch operating mechanism according to an embodiment of the present invention. In the diagram, 1.2.3a
, 3b, 4-6.9-13, 9a, and 10a are the same as the above-mentioned conventional mechanism, and the explanation thereof will be omitted. 21 is the bearing (
A second operating shaft is supported by a fixed portion (not shown) and arranged parallel to the first operating shaft, and is connected to the first operating shaft 4 via a connecting link 22, and is connected to the operating shaft 4 in the same direction. conveys the rotation of 23 is a nine rotation regulating plate fixed to the operating shaft 1, and has a thin upper locking protrusion 23a on the rear side;
A lower locking protrusion 23b having a thinner thickness K is formed on the front side.

A selection lever 24 is fixed to a support shaft 25 and is rotatable in the vertical direction.The support shaft 25 is rotatably supported by a bearing (not shown) fixed to a fixed part. Support shaft 2
A lever 26 is fixed to one end of the lever 26, and a limiting plate 28 is connected to the tip of the lever 26 via a link 27, and is supported by supporting means (not shown) so as to be movable m in the horizontal direction. ing. This restriction plate 28 has a locking protrusion 28a formed in the middle thereof. When the selection lever 24 is in the intermediate rotation position (horizontal position) as shown, the locking protrusions 23a and 23' of the rotation restriction plate 23 of the operating shaft in the intermediate rotation position are engaged.
A locking protrusion 28a is inserted between the locking projection 28a and the locking protrusion 28a and locking the rotation regulating plate 23 in this position.

A blocking plate 29 is fixed to the other end of the support shaft 25 .

When the selection lever 24 is in the intermediate rotation position as shown,
The tip of the blocking plate 29 is positioned and locked between the protruding plungers 9a and 10a of the electromagnetic solenoid 9, 10 in a non-energized state, thereby preventing the selection lever 24 from rotating in the 0°D direction.

A shutter 30 is fixed to a support shaft 31 rotatably supported by a bearing (not shown) fixed to a fixed part, and the selection lever 24 is passed through a long hole 30a in the radial direction. When the selection lever 24 is in the intermediate rotation position as shown in the figure,
The shutter 30 partitions the other end of the operating shaft 4.21, and the operating handle (not shown) is inserted! This prevents rotational operation.

The mechanism of the above embodiment operates as follows.

As shown in FIG. 1, the selection lever 24 is in the intermediate selection position, and the operation f'1-t-4 brings the 6J'' movement handling contact 2 to the intermediate position, and the rotation restriction plate 23 and restriction plate 28 It is assumed that the target is locked and the blocking plate 29 is electrically locked by the electromagnetic solenoid 9.10.

When an electric signal is applied to the electromagnetic solenoid 9-push button switch 11 circuit due to external interlock conditions, when the push button switch 11 is pressed, the electromagnetic solenoid 9 is energized, and its plunger 9a is attracted and the blocking plate 29 is released.

Therefore, when the selection lever 24 is manually rotated in the direction of arrow 0, the restriction plate 28 moves forward and the locking protrusion 28a engages the rotation restriction plate 2.
3 is released from the locking mark 23a, and the locking protrusion 23b
The locking is maintained. At the same time, the shutter 3o is turned on.
direction, and the tension on the operating shaft 4 is released. Here, when an operating handle (not shown) is inserted into the rear end of the operating shaft 4 and rotated counterclockwise, the projection at the upper end of the rotation regulating plate 23 comes into contact with the locking projection 28a and is stopped. As a result, the movable contact 2 comes into contact with the fixed finger contact 3a and [7I
In addition, to switch from the contact position with the fixed contact 3a to the intermediate disconnection position, when the operating shaft 4 is rotated clockwise with the operating handle, the locking projection 231) is locked with the locking projection 28a. Suspended after being impeached for the ninth time. With this, the town! E! l contact 2 is switched to the intermediate position.

At this point, return the selection lever 24 to the intermediate operating position and press the push button switch 11 once.
The biasing force is cut off, and the plunger 9a returns the protrusion 6. In this way, the state returns to the mechanical lock and electrical lock state shown in FIG.

Furthermore, switching from the state shown in FIG. 1 to the fixed contact 3b from the movable contact 2 is performed as follows. If an electric signal is applied to the circuit between the magnetic solenoid 10 and the push button switch 12 due to external interlock conditions, when the push button switch 12 is pressed, the electromagnetic solenoid 10 is energized and its plunger 10a is attracted. The locking to the blocking plate 29 is released.

Therefore, when the selection lever 24 is rotated in the direction of the arrow with the vl-movement, the restriction plate 28 is moved backward, and the locking protrusion 28a is released from the locking protrusion 231) of the rotation restriction plate 23. The locking to the stop projection 23a is maintained. At the same time, the shutter 30 is moved in the D direction to release the partition from the operating shaft 21.

Here, when an operating knob (not shown) is inserted into the rear end of the operating shaft 21 and rotated clockwise, the operating shaft 4 is rotated in the same direction via the connecting link 22, and the lower end of the rotation regulating plate 23 is rotated in the same direction. The protrusion contacts the locking protrusion 28a and is stopped. As a result, the movable contact 2 contacts the fixed contact 3b and is switched from the contact position with the fixed contact 3b to the intermediate disconnection position. To switch, when the operating shaft 21 is rotated counterclockwise with the operating handle, the locking protrusion 23a is switched to the locking protrusion 2.
It is stopped at the rotational position locked by 8a.

Thereby, the movable contactor 2 is switched to the intermediate position.

When the selection lever 24 is returned to the intermediate selection position and the push button switch 12 is pressed, the biasing of the electromagnetic plunger 10 is cut off and the plunger 10a returns to its projected position. In this way, the state shown in FIG. 1 returns to the state shown in FIG.
Although a case is shown in which a contact position is provided, the intermediate position may also be a third separate contact position and a fixed contact may be provided.

〔Effect of the invention〕

As described above, according to the present invention, the switching switch is connected to the intermediate position via the first operating shaft via the connecting means, and the switching switch is rotated to switch between the intermediate position and one position. A second operating shaft is provided which rotates to switch between one position and the other position, and a mechanical locking means locks the first operating shaft at the intermediate rotating position and the other side is set to the selected rotating position by the selection lever. Alternatively, a shutter locking the rotation to one side and interlocking with the selection rotation of the selection lever may be used to lock the rotation to the first side. The other end of the second operating shaft is configured to partition both sides, one side or the other side, and electric locking means locks the selective rotation of the selection lever at an intermediate position, the other side or one side. Since the rotation to the side is locked, when the switching switch can be switched between the intermediate position and one position, the first operating shaft can be rotated to switch between the intermediate position and the other position. When the conditions allow switching between positions, switching can be done by rotating the second operating shaft, making the switching operation easier for the operator and easier to handle, eliminating erroneous operations and preventing malfunctions and accidents caused by them. be done.

[Brief explanation of drawings]

FIG. 1 shows a switching switch operation according to an embodiment of the present invention.
FIG. 2 is a diagram showing the main part of a conventional switching switch operating mechanism. 1...Switching switch, 2...Movable contact, 3a...
One fixed contact, 3b...The other fixed contact, 4.
...First operating shaft, 9.10... Locking means (electromagnetic solenoid), 11.12... Switch means (push button switch), 21... Second operating shaft, 22... Connecting link, 23... Rotation regulating plate, 24... Selection lever 28... Limiting plate, 29... Blocking plate, 30... Shutter, the same reference numerals in the drawings indicate the same or equivalent parts. show.

Claims (1)

[Scope of Claims] An operating device for a switching switch that rotates a movable contact to switch between three positions, a first operating shaft that rotates the movable contact to switch between an intermediate position and one position; A second operating shaft, which is arranged parallel to the operating shaft of the selection lever and is connected to transmit rotation in the same direction via a connecting means, rotates the movable contactor to switch between the intermediate position and the other position. At the intermediate selection rotation position, the first operation shaft is locked at the intermediate rotation position, and at the one side selection rotation position, the first operation shaft is allowed to rotate on one side, and the other side selection rotation is enabled. In the intermediate selection rotation position of the selection lever, a mechanical locking means that allows the first operation shaft to rotate on the other side is rotated in conjunction with the selection rotation of the selection lever, and in the intermediate selection rotation position of the selection lever, the first operation shaft is rotated on the other side. 10 The other end side of the second operating shaft is partitioned, and at one side selection rotation position, the other end side of the second operation shaft is partitioned, and at the other side selection rotation position, the other end side of the first operation shaft is partitioned. a shutter that partitions the operating shaft and prevents rotation from the other end of the partitioned operating shaft; and a shutter that locks the operating lever from both sides in the rotational direction at an intermediate selected rotational position; and
When a signal indicating a condition that allows switching to one or the other position is given, the locking means on one side or the other side is energized by operating the switch means on the side of that position to lock the lock on that side. An operating mechanism for a switching switch, characterized in that it is equipped with an electrical locking means adapted to be unlocked.