JPS594359B2 - Elevator door control device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an elevator door control device.

2. Description of the Related Art Conventionally, an elevator operation control device includes a door control device including a door opening/closing signal and a door opening/closing device.

As shown in Figure 1, the overspeed detection device normally closed contact GOV is connected to the output side of the rectifier (not shown) whose input side is connected to the commercial power supply.
, terminal switch normally closed contact FL, in-car manual switch normally closed contact KS, normally closed contact of various other safety devices such as on-car emergency stop device normally closed contact GR8, safety relay E1 ←) side of common power bus bar The safety relay E is energized through a circuit consisting of the following, and by closing the solenoid normally open contacts E1 and E2, the common power supply buses ←) and (-) and the power supply buses C+ and C- of the operation control device including the door control device are connected. is connected.

Therefore, when one of the normally closed contacts of the safety device is opened, the safety relay E is deenergized, its normally open contacts E and E2 are opened, the elevator comes to an emergency stop at that position, and the door control device is activated. The common power supply bus (g) is separated from the common power bus (g), so it can be easily opened manually.

Therefore, in recent years, in public housing complexes where many elevators have been installed, the impact caused by a child or other child accidentally jumping during operation opens the normally closed contact GR8 of the emergency stop device on the car, causing the car to come to an emergency stop and become in a canned state. , a passenger attempts to escape from the car by manually opening the door, and accidentally falls into the hoistway.
There was a strong possibility that the elevator would suddenly start moving during the escape, resulting in an accident where the elevator car would become stuck between the elevator car and the hoistway wall.

The present invention has been made in view of the above points, and embodiments thereof will be explained with reference to FIGS. 2 and 3.

FIG. 2 shows an elevator door control device according to the present invention, which includes power bus lines D+ and D- of the door control device, which is composed of a door opening/closing signal and a door opening/closing device, and power bus lines E+ and E- of the operation control device.
Separate the door control device's power supply busses RI and D- from the common power supply bus (G) and (-) via the inspection switch normally closed contact TS.
) FC connection, and the power supply buses E+ and E- of the operation control device are connected to the common power supply bus (G) and ←) via the normally open contacts E, , E2 of the safety relay E, as in the past.

With the above configuration, even if the safety relay E is deenergized and the elevator comes to an emergency stop, the door remains closed, so passengers can be prevented from unnecessarily attempting to manually open the door and escape from the car.

Further, by opening the normally closed contact TS of the inspection switch as necessary, it is possible to rescue passengers, perform maintenance and inspection, etc.

In the above embodiment, one inspection switch normally closed contact TS is provided, but if necessary, multiple contacts may be installed in series at appropriate locations (
It can also be installed on the car (on the car, inside the car operation panel box, etc.).

Figure 3 is a simplified part of the door opening/closing circuit in the door control device, where LE is the normally closed contact of a floor level detector (not shown) that is energized at the floor level, and Do is the normally closed contact of the floor level detector (not shown) inside the car. The normally closed contact of the manual door opening button, DT, is a door opening/closing command relay that commands closing the door when energized and opening the door when deenergized.

With the above configuration, the normally closed contact DO of the car manual door opening button is short-circuited by the contact LE that closes at a location other than the floor level, so when the elevator makes an emergency stop outside the floor level, the car manual door opening button is shorted. Button operations are disabled and the door can remain closed.

As explained above, according to the present invention, even if the safety device is activated and the elevator comes to an emergency stop, it is possible to prevent passengers from unnecessarily opening the door manually and escaping out of the car. Since accidents such as falling into the elevator can be prevented from occurring, the safety of the elevator can be improved.

[Brief explanation of drawings]

FIG. 1 shows a conventional elevator operation control device including a door control device, and FIG. 2 shows an elevator door control device according to the present invention.
FIG. 3 shows a simplified partial circuit diagram for opening and closing the door. GOV... Overspeed detection device normally closed contact, FL...
...Terminal switch normally closed contact, KS...Inside car manual switch normally closed contact, GR8...Emergency stop device on car normally closed contact, E...... Safety relay, El,
E2...Safety relay normally open contact, TS...
・・Normally closed contact of the inspection switch.

Claims (1)

[Scope of Claims] 1. In an elevator equipped with a safety relay that detects activation of the elevator safety device, the power bus of the door control device and the power bus of the operation control device are separated, and the commercial power supply and operation control A door control for an elevator, characterized in that a contact of the safety relay is inserted between the power bus of the device, and a normally closed contact of the inspection switch is inserted between the commercial power supply and the power bus of the door control device. Device. 2. The elevator according to claim 1, wherein the door control device enables an in-car manual door opening button when a device for detecting that the car has stopped at a floor level is activated. Door control device.