JPH0115477B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a control device for an elevator door that is opened and closed by a door closing motor.

The elevator doors consist of a car door provided at the entrance of the car and a landing door provided at the entrance of the hoistway and the boarding lobby of each floor. The car door is always tightened and completely closed by the door-closing motor, and is driven by the door-closing motor to open and close only when the car is stopped in the landing zone provided for each floor. On the other hand, the landing door is always locked and fully closed, and when the car is stopped within the landing zone, it engages with the car door and automatically releases when the car door opens. It is locked and opened, closed in conjunction with the closing of the car door, and automatically locked when fully closed.

Such elevator doors are widely used, and a known example of a control device for the same is described in Japanese Patent Application Laid-Open No. 106542/1983. Figure 1 shows a technology equivalent to this known example. Indicates the content. In Figure 1, (+) and (-) are DC power supplies, 1 is a door close command relay contact that is closed when a door close command is issued, and opened when a door open command is issued, and 2 is this door close command relay. Door closing contactors are energized by the closing of contact 1, 2a and 2b are their normally open contacts, 2c is also a normally closed contact, 3 is closed when a door opening command is issued, and opened when the door is fully opened. Door open command relay contact, 4
is a door open contactor energized by the closing of this door open command relay contact 3, and 4a and 4b are its normally open contacts 4c.
is also a normally closed contact, 5 is the field of the door closing motor through which a constant current is constantly flowing, 6 is the armature of the door closing motor that is connected to the car door and opens and closes it, and 7 is connected in series with the armature 6. Connected series resistor, 8 is armature 6
A parallel resistor 9 connected in parallel with the parallel resistor 8 is a door consisting of a group of switches 9a to 9c that short-circuit a part of the parallel resistor 8 when closed. When the car door is in the fully closed (fully open) state with the close position switch, all of the car doors are closed, and as the car door moves from fully closed (fully open) to the open (closed) direction, the switch 9c is turned off. 9
When the car door is opened (closed) to a predetermined position, all of the switches 9a to 9c are opened, and as the car door approaches fully open (fully closed), the opening sequence is reversed to the above opening order. switch 9a in order
The car door is closed sequentially from 9c to 9c, and the car door is fully opened (fully closed).
When the state is reached, all the switches 9a to 9c are closed again. 10 is door closing contactor 2
This is a door closing resistor connected in series with the normally open contact 2a. 12 is a fully closed detection relay energized by the operation of the fully closed detector 11, and 12a and 12b are its normally open contacts.

Assume that the car door is now fully closed, engaged with the landing door. At this time, the door close command relay contact 1 is closed, so the door close contactor 2 is energized.
The normally open contacts 2a, 2b are closed. Further, the fully closed detection relay 12 is energized. Therefore, the door closing motor has (+) - (12b) on armature 6.
-(2a)-(6)-(7)-(2b)-(-) circuit supplies power to keep the car door fully closed. Also,
Parallel resistor 8 is also (+)-(10)-(2a)-(9c)-(8)-(
7)
-(2b)-(-) circuit, so it is applied to the armature 6. That is, during the door closing operation, the fully closed detection relay 12 is not yet energized, so the resistor 10 is inserted. When the door closes, the fully closed detection relay 12 is energized, so that a voltage higher than the previous voltage is applied to the door closing motor 6.

Next, we will discuss the action of opening the door. It is assumed that the door close command relay contact 1 is opened and the door open command relay contact 3 is closed. The door close contactor 2 is deenergized, the door open contactor 4 is energized, and its normally closed contact 4c
is opened to prevent the door closing contactor 2 from being energized, and the opening of the contact 4d causes the fully closed detection relay 12 to be activated.
is deactivated. Also, the normally open contacts 4a and 4b are closed and the armature 6 is (+)-(4a)-(7)-(6)-
It is powered by the (4b)-(-) circuit and rotates in the direction of opening the car door. Since the parallel resistor 8 is set to the minimum value by the door closing position switch 9, the door closing motor rotates slowly with a small force when the door starts to open, and soon all the door closing position switches 9 are opened. When the parallel resistance 8 reaches its maximum, a high voltage is also applied to the armature 6 and the car door is immediately opened. When the door close position switches 9 are opened close to fully open, the door close position switches 9 are closed in the order of switches 9a to 9c, the parallel resistance 9 decreases in sequence, the voltage applied to the armature 6 also decreases, and the rotation of the door close motor decreases. This makes it possible to reduce the force of collision with the door stop at the open end. When the car door is fully opened, the door opening command relay contact 3 is opened and the door opening contactor 4 is deenergized. On the other hand, although the landing door is locked when fully closed, it is unlocked by the door opening operation of the car door and is fully opened in conjunction with the car door. Such elevator landing doors are currently widely used, and detailed explanation thereof will be omitted here.

Next, a case will be described in which a fully opened elevator door is closed. When the door close command relay contact 1 is closed, the door close contactor 2 is energized, and its normally closed contact 2c is opened to prevent the door open contactor 4 from being energized, and its normally open contact 2a , 2b are closed and the armature 6 becomes (+) - (10) - (2a) - (6) - (7) - (2b)
−
Power is supplied by the (-) circuit and the car door is rotated in the direction of closing. In this case, a door closing resistor 10 is connected to suppress the balance when a person is stuck in the door.
The maximum value of the door closing force by the door closing motor is suppressed to a predetermined value or less. As in the case of opening the door above, the parallel resistor 8 is set to the minimum value by the door closing position switch 9, so the door closing motor rotates slowly when the door closing position switch 9 starts. When all are opened and the parallel resistor 8 is at its maximum, a high voltage is also applied to the armature 6 and the car door is immediately closed. When the car door closes close to fully closed, the fully closed detector 11 is closed and the fully closed detection relay 12 is activated (+)-
It is energized by the circuit (11)-(4d)-(12)-(-), its contact 12a is closed and self-maintained, and its normally open contact 12b is closed and resistor 10 is energized. Short circuit. As a result, a high voltage is applied to the door closing motor and a large clamping force is generated, making it difficult for passengers to manually open the closed car door against the clamping force.

However, the car door is prevented from opening not by locking, but by the tightening force of the door closing motor, and this tightening force reduces the collision with the door stop when the elevator door is fully closed. Therefore, it is desirable that it be small. However, since the fully closed detector 11 responds to the movement of the door, even though the door is almost fully closed when the fully closed detector 11 operates, there is still some movement required. Therefore, as the resistor 10 is short-circuited, it is inevitable that the collision with the door stop will increase. Considering the installation error of the fully closed detector 11, it is possible that the moving distance is large.

This invention solves the above problems,
To control an elevator door, which prevents the car door from being easily opened by a passenger, prevents the passenger from falling from the car, and drives the door so that it gently hits the door stop. The purpose is to provide a device.

An embodiment of the present invention will be described below based on FIG. 2.

In the figure, 13 is a thyristor that short-circuits the door closing resistor 10, 14 is a capacitor, and 15 is a charging resistor that forms a charging circuit to this capacitor 14.
16 is a positive voltage dividing resistor of the capacitor 14.

In the elevator door control device configured in this way, the door is opened by the energization of the door opening contactor 4, and the door is closed by the energization of the door closing contactor 2, as in FIG. It is something. Even when the car door is fully closed, the door closing contactor 2 continues to be energized, and the armature 6 receives (+) - (10) - (2a) - (6) - (7) - (2b) - ( -) voltage is applied in the circuit, and the fully closed detector 1
1 is closed, the normally open contact 12b is closed,
(+) - (12b) - (15) - (14) - (2a) - (6) - (7)
−(2b)
-(-) circuit charges the capacitor 14.
When the capacitor 14 is further charged after a predetermined period of time has passed after the normally open contact 12b is closed, and the gate voltage connected to its positive terminal exceeds the turn-on voltage of the thyristor 13, the thyristor 13 becomes conductive and the door closing resistance 10 is shorted. That is, since the tightening force of the door closing motor is increased after a predetermined period of time has elapsed after the fully closed detector 11 is activated, it is possible to prevent the passenger from opening the door manually. In addition, in order to ensure the operation of the fully closed detector 11,
Even if this is activated before the door is fully closed, the tightening force is still small, so the door closes slowly and the door can be fully closed. It will not collide with and roll back.

Further, dust tends to accumulate at the closed end of the door, and depending on the usage situation, it may be desirable to increase the tightening force. In this regard, according to the above embodiment, the tightening force increases after a predetermined period of time has elapsed, so even if dust accumulates, it can be pushed apart and closed.

As described above, this invention operates a fully closed detector immediately before the elevator door stops fully closed, starts a time limit from the activation of this fully closed detector, and elapses the time until the door fully closes and stops. Since the tightening force of the elevator door by the door-closing motor is increased by the delay circuit that operates later, it is possible to prevent the passenger from opening the door manually, thereby preventing the passenger from falling.

Further, when the door hits the door stop, the tightening force is still the same small value as before, so it can be applied gently to the door stop.

Furthermore, even if dust accumulates at the closed end, the tightening force increases after the delay circuit is activated, so that the dust can be pushed out and closed.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional elevator door control device, and FIG. 2 is a circuit diagram showing an embodiment of an elevator door control device according to the present invention. In the figure, 2 is the door closing contactor, 5 is the field of the door closing motor, 6 is the armature of the door closing motor, 10 is the door closing resistor, 11 is the fully closed detector, 12 is the fully closed detection relay, 12b is the normally open contact of the fully closed detection relay.
Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A door-closing motor that opens the door in response to a door open command signal and closes the door in response to a door close command signal and continues to tighten the door even after the door has stopped, and immediately before the door is fully closed and stopped. a fully closed detector which is activated to issue a door closing completion signal; and a fully closed detector which starts a timer upon the door closing completion signal and operates after at least the time normally required for the door to hit the door stop and stop. and a circuit that increases the tightening force of the door-closing motor by operating the delay circuit and continues this increasing state until the door-opening command signal is issued.