JPS63914A - Mechanical interlock unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a mechanical interlock device for mechanically interlocking switching devices.

[Conventional technology]

A conventional mechanical interlock device of this type is shown in FIG.
An example shown in FIG. 8 is disclosed in Japanese Utility Model Application No. 56-9620. That is, in FIG. 7, a lever 11 connected to the switch main body 5 via a link 9 is fixed to one side of the drive shaft 4 of the operating device 3, and a lock lever 1 is fixed to the other side. A lever retainer connected to the switch main body 6 via a link 10 is fixed to one side of the drive shaft 8 of the operating device 7, and the other can be engaged with the lock lever 1 of the operating device 3. Lock lever 2 configured as
is fixed. Further, both the lock levers 1 and 2S form lock surfaces 1a and 2a for locking each other.

Next, the operation will be explained. When the switches 5 and 6 are both in the open state, when the drive mechanism 3 is first operated to close the switch 5, the drive shaft 4, together with the lever 11:l-3 and the lock lever 1 fixed thereto, is activated. Rotate down in the direction. Thereafter, when the lever 11 stops at the closed position, the lock member 1a of the lock lever 1 engages with the lock surface 2a of the lock lever 2.

When the switch 5 is in the closing position as described above, when attempting to operate the drive device 7 to close the switch 6,
The drive shaft 8 tries to rotate counterclockwise, and the lever fixed to the drive shaft 8 also tries to rotate in the same direction. However, at this time, the lock lever 2 and the lock lever 1 are in a locked state as shown in FIG. 8, so that the rotation of the drive shaft 8 is completely blocked and the closing of the switch 6 is prevented.

Next, when the switch 5 and the switch 6 are both in the open state, after the switch 6 is closed, even if an attempt is made to close the switch 5, the lock surfaces 1 & 2a are engaged, and the switch 5 is closed.
input is prevented. As mentioned above, in the conventional mechanical interlock device, the lock levers 1 and 2 operate in conjunction with the drive devices 3 and 7, respectively, and when one of the operating devices is in the closed state, the Ikekata operating device cannot be operated, and the other operating device cannot be operated. The device is configured so that it can only be operated when the operating device is in the open state.

[Problem that the invention seeks to solve]

Conventional mechanical interlock devices are structured as described above, so that when both switches are in the open position, in order to manually lock both drive systems in the open position,
Separate locking devices shall be provided. Further, when the switch 5 is in the closed position and the switch 6 is in the open position, the lock levers fixed to the drive shafts of the respective operating devices are in the locked state, and the operating device 6 is forced to be operated in an attempt to close the switch 6. If you do so, the rotational force will be directly transmitted to the operating device 3, causing damage to the operating device 3. There was a pause.

This invention was made to solve the above-mentioned problems, and it is possible to satisfy the interlock conditions that could not be satisfied with conventional arrangements, and it is also possible to forcibly release the operating device that is in the locked state. Even if it is operated, mechanical damage to the other operating device can be prevented, and manual locking is also possible! 5J--An object of the present invention is to provide a mechanical interlock device that can be locked in a locked state.

[Means for solving problems]

The mechanical interlock device according to the present invention includes a lock lever that is provided with a lever on the drive shaft of the operating device of each switch, and that has an auxiliary lever that can be engaged with the lever and also that can be engaged with the tip of the lever. - and then press this lock lever.
is configured to be held in the locked position or unlocked position by a toggle spring, and the lock lever can be manually operated into a locking position, and a latch for locking the lock lever is attached. It is.

[Effect]

The mechanical interlock device according to the present invention is provided with individual lock levers for locking levers fixed to each other's drive shafts.This satisfies the function of the mechanical interlock device and enables manual locking operation. Locking in the locked state is possible.

〔Example〕

An embodiment of the invention will be described below with reference to FIGS. 1 to 5. That is, 13 and 14 are levers fixed to the drive shafts 4 and 8 of the timing devices 3 and 7, respectively, and 15 is the lever 1 mentioned above.
3, 14, and a lever l3, 1
The lock lever 19 has an auxiliary lever 17 that can be engaged with the tip of the lock lever 17, and is rotatably attached to the fulcrum slide. ! A toggle spring that acts to hold the knife in the bamboo lock release position, and a latch that is fixed to the dot cleaver and have a hole n that can be locked with a padlock 21.

In the mechanical interlock device configured as described above, first, as shown in FIG. 1, when the drive shaft 4 is rotated clockwise, the lever fixed to the drive shaft 4 is released. 13 also rotates in the same direction and engages with the auxiliary lever 17 of the lock lever as shown in FIG.

If you further rotate the lever mouth clockwise, this lever 1
3 rotates to the closing position via the auxiliary lever 17. With this action, the lock lever 15G! It rotates counterclockwise and is held at the lock position t by the toggle spring 19, and the lock surface 16 of the lock lever 15 engages with the lever 14 as shown in FIG. 8, resulting in a locked state. Next, when the lever base is rotated counterclockwise, the lever base engages with the auxiliary lever 17 as shown in FIG. When the lever 13 is further rotated, the lever 13 rotates to the open position via the auxiliary lever 17. As a result of this operation, the lock clipper rotates clockwise and is held at the unlocked position by the toggle spring 19, and the lever 14 is disengaged from the four faces 16 of the lock lever 15, resulting in the unlocked state.

Further, even if the levers 13 and 14 are simultaneously rotated clockwise or counterclockwise, the operations of each part are the same as described above.

In the above embodiment, the drive shafts 4 and 8 of the drive devices 3 and 7 are provided with levers 13 and 14, but the drive devices 3 and 7 are provided with levers 13 and 14.
, 7 and the switches 5 and 6 may be provided in an intermediate mechanism.! ! In the above embodiment, the drive shafts 4 and 8 rotate and are provided with a lever B114, but in another embodiment, as shown in FIG. A lock lever b having a protruding member 17& in place of the auxiliary lever 17 can also be adapted to an installation in which the auxiliary levers 4 and 8 reciprocate.

In addition, in the above embodiment, the case where it was applied to a switchgear was explained, but what about the case where it is applied to a drive device of other equipment? The present invention may also be employed as a mechanical interlock device for a safety device, and both have the same effects as the above embodiments.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to interlock two opening/closing devices with a simple structure in which lock levers are individually provided, and also to be used as a locking device that can be manually locked and unlocked. Because of this structure, a highly accurate mechanical interlock device can be provided at low cost.

[Brief explanation of drawings]

Figures 1 to 5 illustrate the structure and operation of a mechanical interlock reinstallation according to an embodiment of the present invention, and each figure a
is a front view, b is a side view showing the relative relationship between the lever and the lock lever, FIG. 6 shows another embodiment, a is the side wall, b is
is a plan view. FIGS. 7 and 8 illustrate the structure and operation of a conventional device, with 1a being a front view and b being a view showing the relative relationship of the lock levers. In the figure, 3 and 7 are driving devices, 4 and 8 are drive shafts, sum,
14 is a lever, 15 is a lock lever, 16 is a lock surface,
17 is an auxiliary lever, 19 is a toggle spring, and 1 is a latch. In addition, the same symbols in the figures are the same:! Or show the corresponding part.

Claims (2)

[Claims] (1) Each of the two drive devices has a lever fixed to the drive shaft, a lock surface that engages with both levers, and an auxiliary lever,
And a lock lever attached so that it can rotate freely around a fulcrum,
A mechanical interlock device characterized in that the lock lever is provided with a toggle spring for holding both the levers in a locking position or an unlocking position. (2) The mechanical interlock device according to claim 1, wherein the lock lever is provided with a latch for manual locking and unlocking operations.