JPS5925829Y2 - Elevator locking device - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a device for locking elevator doors.

The elevator landing door is locked when the car is not in the car so that it cannot be opened from the landing, and is unlocked and opened when the car stops.

This is done by an unlocking cam provided on the car and a locking mechanism provided at the landing.

The cam is operated by an electromagnetic coil, and when the electromagnetic coil is energized, the cam moves backward toward the landing, and when the electromagnetic coil is deenergized, the cam moves forward.

That is, while the car is in operation, the coil is energized, the cam moves backward, and the cam is not engaged with the locking mechanism, so that the landing door is locked.

When the car stops, the coil is deenergized and the cam moves forward by the force of the spring, engaging the locking mechanism to unlock the landing door, and opening the landing door in conjunction with the car door.

In this way, since the landing door is unlocked when the car is on the floor, it is possible to manually open the landing door from the landing.

Therefore, when the car is idle for a long time, there is a risk that someone may get into the car and use it for some kind of crime, or that equipment, walls, etc. inside the car may be tampered with.

This invention corrects the above-mentioned problems and aims to provide an elevator locking device that locks the door of the landing when the car is not in use and prevents people from entering the car.

An embodiment of this invention will be described below with reference to figures.

In the figure, (+) and (-) are DC power supplies, 1 is an operation control switch that is installed inside the car and closes when the elevator is in operation, and opens when the elevator is stopped; 2 is an operation control relay;
a is its normally closed contact, 2b is also its normally open contact, 3 is a pause switch that is installed in the hall and closes after the elevator stops and opens before restarting the elevator, 4 is the maintenance release relay, and 4a is its normally open contact. , 5 is a non-interference time setting time relay contact that is open while the car is running and closes after a certain period of time has passed after the car stops; 6 is a run command relay contact that is closed by a run command and opened when running starts; 7 is a door control relay that issues a door close command when activated and issues a door open command when deactivated.
7a and 7b are normally open contacts; 8 is a door open position detection relay contact that closes when the door is closed and opens when it reaches a certain distance before the stop floor; and 9, when energized, retreats the cam and deenergizes it. This is the already mentioned electromagnetic coil that is moved forward when it is moved.

It is now assumed that the car is stopped on the second floor and the door is open.

Since the elevator is in operation, the operation control switch 1 is already closed, the operation control relay 2 is energized, the contact 2a is open, and the contact 2b is closed.

When a passenger boards the car and registers the car call on the first floor,
When a travel command is issued, the travel command relay contact 6 is closed.

When the non-interference time elapses and the timed relay contact 5 closes,
The door control relay 7 is energized by the circuit of (+) -5-6-2b-7 (-), and the contacts 7a and 7b are closed.

The electromagnetic coil 9 is energized by closing the contact 7b, and the cam moves backward.

A door closing command is issued by energizing the door control relay 7, and the car door and landing door are closed.

Then, when the door is closed, the door is locked.

When the door is locked, the brake is released and the car starts running.

When the vehicle starts running, the time relay contact 5 is opened.
Since the door open position detection relay contact 8 is closed when the door is closed, (+) -8-7a-2b-7-(-)
(7) In the circuit, the relay 7 maintains itself and energizes the electromagnetic coil 9 while the car is running.

When the car reaches a certain distance in front of the first floor, the contact 8 is opened, so the relay 7 is deenergized, the contact 7b is opened, the electromagnetic coil 9 is deenergized, and the cam moves forward.

Then, just before landing on the first floor, the cam and the locking mechanism engage, and the landing door is unlocked.

As a result, the landing door is opened in conjunction with the car door.

Next, when the car is to be stopped on the first floor, the manager opens the driver side switch 1 in the car, manually closes the landing door, and closes the landing stop switch 3.

When switch 1 is opened, relay 2 is deenergized and contact 2a is closed, so maintenance release relay 4 is energized and contact 4 is closed.
a is closed.

As a result, the electromagnetic coil 9 is energized, the cam is moved backward, and the landing door is locked.

Therefore, when the car is not in use, it is no longer possible to open the landing door and enter the car.

Next, when restarting the elevator operation, when the switch 3 is opened, the relay 4 is deenergized and the contact 4a is opened, so the electromagnetic coil 9 is deenergized, the cam moves forward, and the landing door is unlocked. be done.

Therefore, by manually opening the landing door, entering the car, and closing switch 1, operation can be resumed.

Note that the switch 3 may be provided in the elevator attendant's room.

Furthermore, in the embodiment, it has been explained that the cam is controlled by switch 3, but this can be done automatically, that is, by switch 1.
It is also easy to energize the electromagnetic coil 9 to retract the cam when the vehicle is opened, and to deenergize the electromagnetic coil remotely (for example by a call signal from a hall button) when restarting operation.

As explained above, in this invention, when the elevator is not operating, the unlocking cam is moved backward even if the car is stopped at the landing, and the locking mechanism between the cam and the landing door is released, and the landing door is locked. As a result, even in an elevator equipped with an unlocking cam, it is possible to prevent people from entering the car from the landing while the car is at rest.

Furthermore, since the car is always there when the door is opened from the landing, the danger of the holder falling into the hoistway can be eliminated.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of an elevator locking device according to this invention. 1... Operation control switch, 2... Operation control relay 3... Pause switch, 4...
... Disengagement relay 5 ... Time limit relay contact for non-interference time setting, 6 ... Travel command relay contact,
7... Door control relay, 8... Door open position detection relay contact, 9... Electromagnetic coil for locking cam retraction.

Claims (1)

[Scope of utility model registration request] The car is provided with an unlocking cam that moves backward when the car is in operation and moves forward when the car reaches the floor, and when the unlocking cam is moving forward, it engages with the unlocking cam to unlock the door of the landing. A locking mechanism is provided at the landing which locks the door of the landing by releasing the engagement when the unlocking cam is retracted, and the car is stopped at the floor and the car is stopped there. In this case, if the switch is installed at a location other than the car, and if the switch is operated while the car is stopped on the floor, the unlocking cam is moved backward to protect the unlocking cam and the locking mechanism. A locking device for an elevator, characterized in that it is equipped with a lock release circuit that releases the lock.