JPH07125944A - Elevator control system at power stoppage - Google Patents

Abstract

PURPOSE:To provide an elevator control means at the time of a power stoppage capable of preventing the wasting of an emergency power source. CONSTITUTION:When no person exists in a car at the time of a power stoppage, the power stoppage rescue operation command from a power stoppage automatic landing device LDP is cut off by a power stoppage operation pattern selecting device DS. When the elevator car is landed outside the prescribed range of a floor by a normal power source recovery automatic landing device LD at the time of the recovery of a normal power source, a command operating the elevator car at a low speed to stop it within the prescribed range is selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to elevator control means during a power failure, and more particularly to elevator control means during a power failure effective for preventing waste of an emergency power source.

[0002]

2. Description of the Related Art Conventionally, there has been a technique for rescue operation (emergency operation) of an elevator by using an emergency power source when the regular power source fails and the elevator stops in the middle of the floor.

[0003]

The above prior art has a problem that the emergency power source is wasted because the rescue operation is performed even when passengers are not trapped in the elevator car during a power failure.

It is an object of the present invention to provide elevator control means at the time of power failure which can eliminate waste of the emergency power supply.

[0005]

In order to achieve the above object, the present invention detects the absence of passengers in a car by detecting the absence of passengers in an elevator that uses an emergency power supply to rescue the elevator during a power failure. Passenger detection means for outputting, means for stopping the rescue operation of the elevator according to the output signal of the passenger detection means, and the elevator at a low speed within the predetermined range when the elevator is out of the predetermined range with respect to the floor when the power source is restored. And means for stopping.

[0006]

[Function] When a passenger is not trapped in the elevator car at the time of power failure, a means for stopping the rescue operation by the one that rescues the elevator by using the emergency power supply when the power failure occurs by the output signal from the passenger detection means The means for stopping the elevator at a low speed when the elevator is out of the predetermined range with respect to the floor at the time of restoration of the regular power supply works to prevent waste of the emergency power supply.

[0007]

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, in the elevator, when the car button switch CB in the car C coupled through the counterweight CW, the sheave of the motor M and the rope R is not operated, and a power failure occurs, The power failure operation pattern selection device DS shuts off the rescue operation command during a power failure by the automatic landing device LDP during a power failure, and the elevator is out of the predetermined range relative to the floor when the normal power source is restored by the automatic landing device LD when the normal power source is restored. By selecting and outputting a command to operate the elevator at a low speed and stop it in the predetermined range at a certain time, it is possible to stop the rescue operation when passengers are not trapped during a power outage and prevent waste of the emergency power supply. I have to.

As shown in FIG. 2, the power failure operation pattern selection device DS for selecting the operation pattern at the time of power failure outputs the output signal of the automatic landing device LDP during power failure to a command for operating the elevator after the restoration of the normal power supply. It is selected when the normally closed contact A1 of the relay A that operates when it occurs is closed, and is selected when the normally open contact A2 of the relay A is closed as the output signal of the automatic landing device LD upon restoration of the normal power supply.

As shown in FIG. 3, the electric circuit for driving the relay A is connected in series with the power source E of the relay circuit and the relay A, and the normally closed contacts CB1 to CB1 of the car button switch CB for the nth floor. CBn.

When the elevator is operated by operating the car button switch CB, one of the normally closed contacts CB1 to CBn of the car button switch CB is opened so that the relay A is deenergized and the normally closed contact A1 of the relay A is Since it closes, the power failure operation pattern selection device DS selects the output signal of the power failure automatic landing device LDP.

When the elevator car is unattended and the car button switch CB is not operated and the elevator is operated by operating a hall call button switch (not shown), all the normally closed contacts CB1 to CBn of the car button switch CB remain closed. Therefore, the relay A is energized, the normally closed contact A1 of the relay A is opened, and the normally open contact A2 of the relay A is closed. Therefore, the operation pattern selection device DS at the time of power failure is the automatic landing device LD at the restoration of the normal power source.
Select the output signal of. Automatic landing device L when power is restored
Regarding the concrete structure of D, there is a conventional technique such as a control device for an AC elevator described in JP-A-56-70287, and any method can be adopted as long as it is effective in the conventional technique. Good.

Further, in the present embodiment, as a method for detecting the unmanned passenger in the car, a method of judging unattended operation by not operating the car button switch CB is used. However, in addition to this method, passengers by ultrasonic waves etc. in the car are used. There is a method such as mounting a detection device to detect the absence of passengers.

[0014]

According to the present invention, when a passenger is not trapped in the elevator car during a power failure, an output signal from the passenger detection means is used to rescue the elevator by using the emergency power supply during a power failure. To stop the emergency power supply from being wasted, by the means to stop the rescue operation by the emergency power supply and the means to stop the elevator at a low speed within the predetermined range when the elevator is out of the predetermined range with respect to the floor when the utility power is restored. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an elevator.

FIG. 2 is a circuit diagram of a power failure operation pattern selection device.

FIG. 3 is a relay circuit diagram.

[Explanation of symbols]

LDP ... Automatic flooring device at power failure, LD ... Automatic flooring device at restoration of normal power supply, DS ... Operation pattern selection device at power failure.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiro Inoue 1-6, Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] 1. In a rescue operation of an elevator using an emergency power source in the event of a power failure, passenger detection means for detecting the absence of passengers in the car and outputting a signal, and the output signal of the passenger detection means A means for stopping the rescue operation of the elevator, and a means for operating the elevator at a low speed and stopping it within the predetermined range when the elevator is out of a predetermined range with respect to the floor when the utility power is restored. Elevator control method at the time of power failure.