JPH08198552A - Elevator door control device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an elevator door control device that reduces passenger accidents when the safety device for elevator control operates and the car suddenly stops. [Structure] For example, when the governor operates, the contact 1b is opened, and the relay 4 is de-energized, the contact 4b is closed, the timer 5T is energized after a predetermined time, the contact 5Ta is closed, and the door control power source is the battery. Switched to E. [Effect] When the elevator is stopped and the car is stopped in the door zone, the door is automatically opened so that passengers can easily get off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door control device that opens an elevator door when a control safety device is activated and the elevator suddenly stops.

[0002]

2. Description of the Related Art Elevator speed control devices are provided with a large number of control safety devices, such as a speed governor, an emergency stop device, an open-phase reverse-phase electric device, etc., and these control safety devices are activated while the car is running. Then, for safety, the control power supply is cut off. Therefore, with the door closed, the car suddenly stops and remains stopped.

Regarding the present technology, for example, Japanese Patent Application Laid-Open No. 4-327481 for speed control and Japanese Patent Application Laid-Open No. 54-77937 for door control can be cited.

[0004]

In the above conventional apparatus, when the car suddenly stops, passengers in the car immediately contact the maintenance company by the external communication device. Therefore, a maintenance engineer from a maintenance company rushes to the scene to rescue the passengers, while the passengers are inevitably trapped in the car for a long time.

In view of the above drawbacks, the present invention provides an elevator door control device that effectively opens the door and reduces trapping accidents when the control safety device operates and the car suddenly stops. It is in.

[0006]

The object of the present invention is to provide an elevator door control device for automatically opening and closing a door when a car arrives at a predetermined floor in response to an operation of an elevator control safety device. This is achieved by providing switching means for switching the power source for controlling the opening and closing of the door to the battery power source after a predetermined time has passed after the control safety device was activated.

[0007]

In the present invention, for example, it is assumed that the car overspeeds for some reason, the governor operates, a stop command is issued to the car, and the car suddenly stops. Since the power for controlling the door is supplied from the battery power after a predetermined time, when the car is stopped in the door zone, the door is automatically opened and passengers in the car can get off. As described above, when the car is stopped in the door zone, the trapping accident disappears, and the trapping accident can be reduced accordingly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is an electrical connection diagram of an embodiment according to the present invention. In the figure, 1b to 3b are control safety devices b
Contact points 1b are a switch b contact that operates when the governor detects an overspeed, 2b is a relay b contact that is activated when an overcurrent of the drive motor is detected, and 3b is a three-phase AC power source. The b contact of the relay that detects the reverse phase or the open phase, 4 is the relay that is deenergized when any of these safety devices is activated, 4a1, 4a2 are its a contact, 4b
Is its b contact, 5 is an operation controller, 6D is a diode,
E is a battery, to which direct current power is supplied via the contact 4a1. 5T starts counting when the relay 4 is de-energized, and a predetermined time (the maximum time until the car suddenly stops,
It is a timer that is activated when 4 seconds elapse, 5T
a is its a contact, 11 is a door closing command relay, and 11
b is its b contact, 12 is a door opening command relay 12b
Is its b contact, 13a and 13b are the a contact and b contact of the door start preparation relay, and 14b is the car traveling relay b.
15b1 and 15b2 are b-contacts of door zone detection switches on each floor, CLb is a b-contact of a door closed end detection relay, OLb is a b-contact of a door open-end detection relay, and a relay 11 has contacts 13a, 12b and CLb. Connected in series,
The relay 12 has contacts 15b1 (15b2), 13b, 1
1b, 14b, and OLb are connected in series. In addition,
P and N are DC power supplies obtained by rectifying a three-phase AC power supply.

Next, the operation of this embodiment will be described.

Now, it is assumed that all control safety devices are normal. At this time, the relay 4 is energized by the circuit P-1b-2b-3b-4-N. Therefore, since the contacts 4a1 and 4a2 are closed, the operation control device 5 operates normally and the battery E is charged via the diode 6D. Further, the door closing command relay 11 and the door opening command relay 12 also operate normally. That is, when the car starts decelerating to the destination floor, the contact 13a opens and the contact 1
3b closes. When the car enters the door zone, for example, contact 15b1 closes, when the car stops, contact 14b closes, and P-15b1-13b-11b-14b-OLb-.
12-N circuit is formed, relay 12 is energized,
The door begins to open. And when the door is fully opened, the contact point OL
b is opened and the relay 12 is deenergized. After a lapse of a predetermined time, the contact 13a is closed, and P-13a-12b-CLP-
The relay 11 is energized by the circuit 11-N, the door starts to close, and when the door is completely closed, the contact CLb opens and the relay 1
1 deactivates.

Next, it is assumed that, while the car is running, the speed becomes excessive due to some cause and the governor operates to open the contact 1b. When the contact 1b is opened, the relay 4 is de-energized, and the contact 4a
1, 4a2 open and the operation control device 5 and the relay 11,
12 becomes invalid and the car stops abruptly. Contact 4 at this time
Since b is closed, the timer 5T starts counting and is energized after 4 seconds (at this time, the car is stopped), and the contact 5
Ta is closed, battery power supply E, door relay 1
The power supplies 1 and 12 are supplied. Therefore, if the car stops suddenly in the door zone and the contact 15b2 is closed, P-15b2-13b-11b-14
The door is opened by the circuit of b-OLb-12-N. At this time, if a passenger is in the car, the passenger can easily escape to the outside. If the safety device is activated and the battery E is switched to at the same time, it is very dangerous to issue a door open command when the car passes through the door zone while traveling, and therefore the battery E is supplied after the car has completely stopped. It is something that is done.

As described above, when the safety device for control operates to stop the car, and when the car is stopped in the door zone, the door is automatically opened and the passenger can get off. Only, trapping accidents can be reduced.

[0014]

As described above, according to the present invention, the door automatically opens when the control safety device operates and the car suddenly stops, or when the car is stopped in the door zone. Since the configuration is adopted, when the vehicle is stopped in the door zone, there is no trapping accident, and there is an effect that the trapping accident can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is an electrical connection diagram showing an embodiment of a control device for an elevator door according to the present invention.

[Explanation of symbols]

 4 Safety detection relay 5T timer 11 Door closing command relay 12 Door opening command relay P, N DC power supply terminal E Battery

Claims (1)

[Claims] 1. An elevator door control device for automatically controlling the opening and closing of a door when a car arrives at a predetermined floor in response to the operation of an elevator control safety device, wherein the control safety device operates. From the above, an elevator door control device is provided with a switching means for switching the power supply for controlling the opening and closing of the door to a battery power supply after a predetermined time.