JP3400943B2 - Elevator door control - Google Patents

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 provided with a photoelectric device having a light projecting portion and a light receiving portion at the entrance and exit of a car.

[0002]

2. Description of the Related Art Generally, as an elevator door control device, a photoelectric device having a light projecting portion and a light receiving portion is provided at a doorway of a car, and it is detected that light rays from the light projecting portion of the photoelectric device are blocked. It is known that a closing operation preventing means for preventing the closing operation of the door is added. In recent years, in order to improve the performance of an elevator door control device, as shown in Japanese Patent Application Laid-Open No. 8-208162, an optoelectronic device in which light beams from a large number of light projecting units are received by a light receiving unit has already been delivered. It has come to be used for.

[0003]

However, in all the conventional elevator door control devices, the electric power is supplied to the photoelectric device by pulling it from the transformer of the control panel in the mechanical room. Wiring work up to was necessary, which required a great deal of time and labor.

An object of the present invention is to provide an elevator door control device that can reduce the time and labor required for wiring work for obtaining a power source for a photoelectric device.

[0005]

In order to achieve the above object, the present invention provides a photoelectric device having a light projecting portion and a light receiving portion at the entrance and exit of a car, and detects the shielding of light rays from the light projecting portion. In a door control device for an elevator provided with a closing operation preventing means for preventing the door closing operation, the photoelectric device is connected to the power supply of the car lighting device of the car, and the power supply of the car lighting device is cut off. At this time, invalidating means for invalidating the closing operation blocking means is provided.

In the elevator door control device according to the present invention, the photoelectric device is connected to the power source of the lighting device in the car of the adjacent car as described above. Therefore, the wiring work for this connection is performed as in the conventional case. Compared to the case where the power is supplied from the machine room, the time and labor can be greatly reduced, and the invalidating means that invalidates the closing operation blocking means when the power supply of the car lighting system is cut off. Since the power supply to the in-cage lighting device is shut off, the closing operation blocking means blocks the closing operation of the door in the same state as when the light beam from the light projecting unit of the photoelectric device is blocked. Therefore, the invalidation means is invalidated, and it is possible to prevent the door open state from continuing due to the power-off of the in-car illumination device, and to perform efficient service.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a power supply circuit diagram of a photoelectric device in an elevator door control device according to an embodiment of the present invention. An in-car lighting device is provided in a car (not shown), and as the power supply 1 for this in-car lighting device, the 100V power supply of the building is usually drawn.
The light source 2a and the light receiver 2 are connected to the power supply 1 of the in-car lighting device.
An optoelectronic device 2 having b is connected, and a light beam 3 is emitted from a light projecting portion 2a by a power source 1 of the in-car lighting device. Further, the power supply 1 of the in-car illumination device is connected to a cutoff detection relay 4 that detects the cutoff, and the cutoff detection relay 4 has a normally closed contact 4b that constitutes invalid means.

FIG. 2 is a circuit diagram of a control circuit in an elevator door control device according to an embodiment of the present invention. Between the control power sources PN of the photoelectric device 2, a normally-closed contact 5 that is turned off by the operation of a door safety (not shown)
And a switch 6 operated by an open button (not shown),
Normally open contact 7 that opens when the light beam 3 of the photoelectric device 2 is blocked
, A door closing command circuit 8 and a door opening / closing auxiliary relay 9 are connected in series, and a disconnection detection relay that is demagnetized by detecting the disconnection of the invalid means, that is, the power supply 1 of the car lighting device in parallel with the normally open contact 7. 4 normally closed contacts 4b are connected. Further, between the control power sources PN, a normally closed contact 11b of the door opening command relay 11 and a normally open contact 9a of the door opening / closing auxiliary relay 9,
The close limit switch CLS and the door closing command relay 10 are connected in series. Further control power supply PN
In between, a normally closed contact 10b of the door closing command relay 10
A normally closed contact 9b of the door opening / closing auxiliary relay 9, an open limit switch OLS, and a door opening command relay 11
And are connected in series.

Next, the operation of the elevator door controller will be described. Now, when the light ray 3 from the light projecting portion 2a shown in FIG. 1 reaches the light receiving portion 2b, the normally open contact 7 shown in FIG. 2 which is opened when the light ray of the photoelectric device 2 is blocked is closed. Since the normally-closed contact 5 which is turned off by the operation of the safety (not shown) is in the closed state, and the switch 6 which is operated by the open button (not shown) is also in the closed state, the control power source P ... … Normally closed contact 5
...... Switch 6 …… Normally open contact 7 …… Door closing command circuit 8
... Door opening / closing auxiliary relay 9: A circuit of the control power supply N is formed, and the door opening / closing auxiliary relay 9 is excited.

Therefore, the normally-open contact 9a of the door opening / closing auxiliary relay 9 is closed and the normally-closed contact 9b thereof is opened, and the control power source P ... Normally-closed contact 11b of the door opening command relay 11 ...
Door opening / closing auxiliary relay 9 normally open contact 9a ... Close limit switch CLS ... Door closing command relay 10 ...
A circuit of the control power supply N is formed. Therefore, the door closing command relay 10 is excited and the door (not shown) is closed.

During the closing operation of the door, when the light beam 3 is shielded by a user who tries to get into the car, the normally open contact 7 of the photoelectric device 2 which is opened when the light beam 3 is shielded is opened to assist the opening and closing of the door. The relay 9 is disconnected from between the control power sources PN and demagnetized. Therefore, the normally-open contact 9a of the door opening / closing auxiliary relay 9 is opened and the normally-closed contact 9b is closed, and the normally-open contact 9a is opened to demagnetize the door-closing command relay 10 and the normally-closed contact 9b is closed. , Control power supply P ... Normally closed contact 10b of the door closing command relay 10
...... Normally closed contact 9b …… Open limit switch OLS
...... Door opening command relay 11 ...... A circuit of the control power supply N is formed. Therefore, the door opening command relay 11 is excited, and the door (not shown) is opened. As can be seen from the above description, the control circuit shown in FIG. 2 constitutes a closing operation blocking unit that detects the blocking of the light beam 3 from the light projecting unit 2a and blocks the closing operation of the door.

On the other hand, when the power supply 1 of the in-car lighting device is interrupted or the building power supply is shut off, the shut-off of the power supply 1 is detected by being connected to the power supply 1 of the in-car lighting device and deactivating the extinction detection relay 4. Then, the normally closed contact 4b is closed and the invalid means is activated, and the control power source P ... Normally closed contact 5 ... Switch 6 ... Normally closed contact 4b ... Door closing command circuit 8 ... Door Opening / closing auxiliary relay 9 ... The circuit of the control power supply N is formed, the normally open contact 7 that is opened when the light beam of the photoelectric device 2 is blocked is invalidated, and the door opening / closing auxiliary relay 9 is excited. . If there is no normally-closed contact 4b, which is the invalid means, if the power source 1 of the lighting device in the car is out of power, the same state as when the light beam 3 of the photoelectric device 2 is blocked is generated, and the passenger is in the car. When it is judged that the vehicle is about to get into the vehicle, the door opening command relay 11 of the door is excited and the door is opened. Since the power supply 1 of the in-car lighting device is out of power, this state continues, and the door (not shown) continues to be open. Therefore, the elevator cannot respond to calls from other floors.

However, as described above, the photoelectric device 2
In order to eliminate the inconvenience that the light beam 3 of the photoelectric device 2 is blocked when the power source 1 of the in-car lighting device is cut off, the power source of the in-car lighting device is removed. The normally-closed contact 4b of the light-off detection relay 4 that detects the power failure of 1 is connected in parallel with the normally-open contact 7 that opens when the light beam 3 of the photoelectric device 2 is blocked. Since the means is configured, the power source of the photoelectric device 2 provided on the door of the car can be obtained from the power source 1 of the car lighting device in the vicinity thereof, and compared with the conventional wiring from the machine room away from the door. Not only is it greatly simplified, the working time and cost are greatly reduced, but also the door can be prevented from being opened when the power supply 1 fails.

[0014]

As described above, in the elevator door control device according to the present invention, the power source for the photoelectric device is obtained from the power source for the lighting device inside the car, so that the wiring work for this connection is performed as in the prior art. Compared with the case where power was supplied from the machine room, the time and labor can be greatly reduced, and when the power supply to the car lighting system is shut off, the closing operation blocking means is disabled. Since the means is provided, when the power supply of the lighting device in the car is cut off, the same state as that in which the light beam from the light projecting unit of the photoelectric device is blocked, and the closing operation blocking means blocks the closing operation of the door. Therefore, the invalidation means is invalidated, and it is possible to prevent the door open state due to the power supply shielding of the in-car lighting device from being continued and to perform efficient service.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a power supply circuit of an elevator door control device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a control circuit of the door control device for the elevator shown in FIG.

[Explanation of symbols]

1 power supply 2 Photoelectric device 2a Projector 2b Light receiving part Three rays 4 Break detection relay 4b Normally closed contact 7 Normally open contact 10 Door closing command relay 11 Door open command relay

Front Page Continuation (72) Inventor Makoto Kuroki 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Hitachi Building Systems Co., Ltd. (72) Inventor Masahiro Yamada 2-156, Mimicho, Kasugai-shi, Aichi Toyo Denki Co., Ltd. ( 56) References JP-A-5-338969 (JP, A) JP-A-6-135645 (JP, A) JP-A-6-144758 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66B 1/00-13/30

Claims (2)

(57) [Claims] 1. A photoelectric device having a light projecting portion and a light receiving portion is provided at an entrance / exit of a car, and a closing operation preventing means for detecting a shielding of a light beam from the light emitting portion to prevent a closing operation of a door is provided. In the elevator door control device, the photoelectric device is connected to the power source of the car lighting device of the car, and the invalidating means is provided for invalidating the closing operation blocking device when the power source of the car lighting device is shut off. An elevator door control device characterized in that 2. The door opening door according to claim 1, wherein the closing operation preventing means is connected between control power sources and is closed to open the door when detecting blocking of light rays from the light projecting portion. An elevator door control device having a contact for exciting a command relay, and the invalidating means having a contact connected in parallel to the contact to close when the power source of the in-car lighting device is shut off.