JPH04201969A - Door control device for elevator - Google Patents

Abstract

PURPOSE:To prevent the runaway of a door by providing a door control device with a microcomputer with door speed patterns stored therein, and disposing a rotary encoder at the shaft of a door motor. CONSTITUTION:When a closing command signal 5 is turned on at a door closing starting point 8, the travel of a door is performed as shown in a closing speed characteristic 7 by a speed pattern previously stored in a microcomputer 4. When the closing command signal 5 is then turned off at a closing command point 9, the microcomputer 4 detects the door being in travel by the signal of a rotary encoder 2. On the basis of this detection, the microcomputer 4 decelerates the door to a stop by the previously stored speed pattern. Upon detecting the stop of the door by the signal of the rotary encoder 2 and after the lapse of the specified time (t-seconds) from this detection, the microcomputer 4 operates a relay 10, and a motor 1 is cut off from a motor driving circuit 3 by contacts 10A, 10B operated by the relay 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method for an elevator door.

[Conventional technology]

As described in Japanese Utility Model Application Publication No. 58-196368, the conventional device includes a door opening control element that drives an electric motor for opening and closing the door in the direction in which the door opens, and a door closing control element that drives the motor in the direction in which the door closes. The structure was as follows.

[Problem to be solved by the invention]

In the above conventional technology, if the door open command and the door close command are interrupted at the same time while the door is opening or closing, the electric motor that opens and closes the door is disconnected from the motor drive circuit. The opening/closing control becomes impossible,
There was a problem with the door swinging out of control.

The purpose of the present invention is to prevent the door from running out of control, to stop the door,
The purpose is to separate the motor that opens and closes the door from the motor drive circuit.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a door control device with a rotary encoder for detecting the door speed, and a door speed command generation device that operates with a microcomputer to control the door speed according to the situation. do.

[Effect]

The door control device is equipped with a microcomputer that stores the door speed pattern. In addition, a rotary encoder or the like is installed on the shaft of the door motor to detect the door speed, and even if the open command and the close command are turned off at the same time while the door is moving, the microcomputer that stores the door speed pattern will automatically detect the door speed. Control speed.

By doing this, during the opening and closing operations of the door,
Since the electric motor is never disconnected from the electric motor drive circuit, the door will not run out of control.

〔Example〕 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a door control device according to the present invention.

1 is an electric motor that drives the door. 2 is a rotary encoder directly connected to the shaft of the electric motor 1, and 3 is a circuit for driving the electric motor 1-. 4 is a microcomputer that sends signals for controlling the electric motor 1 to the electric motor drive circuit 3 according to the close command, the open command, and the signal from the rotary encoder 2.
Output to.

FIG. 2 shows the speed characteristics of the door obtained by the close command and the open command. 5 is a signal for closing command, 6
7 shows the opening command signal, 7 shows the speed characteristic of the door with time on the horizontal axis, and closing speed on the vertical axis.

7-a is the speed characteristic of the door obtained by the closing command signal 5-a and the opening command 6, and 7-b is the closing command signal 5-b and
It shows the speed characteristics of the door obtained by the opening command signal 6.

78, the operation of which will be explained with reference to FIGS. 1 and 2, causes the door to run as shown in the closing speed characteristic 7 according to the speed pattern previously stored in the microcomputer 4 when the closing command signal 5 is turned on at a point. Next, when the close command signal 5 turns off at point 9, the microcomputer 4 detects that the door is running based on the signal from the rotary encoder 2, and based on this, the microcomputer 4L uses the pre-stored speed pattern to , slows down the door and stops it. Then, it is detected by the signal from the rotary encoder 2 that the door has stopped, and after a predetermined period of seconds has elapsed, the microcomputer 4 operates the switch 10, and the contact 10A operated by the relay 10, the electric motor] is separated from the motor drive circuit 3.

〔Effect of the invention〕

According to the present invention, even if the close command and the open command are turned off at the same time while the door is running, the door is stopped and then the electric motor is disconnected from the motor drive circuit, thereby preventing the door from free-running while the door is running. There isn't.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram of the present invention, and FIG. 2 is a diagram showing the opening command signal, the closing command signal, and the speed characteristics of the door at that time. 1... Electric motor, 2... Rotary encoder, 3 motor drive circuit, 4... Microcomputer, 2... Closing command signal, 6... Opening command signal, 7... Door closing speed characteristics, 8
...Door closing start point, 9...Closing command 2 time command simultaneous OF
Point F.

Claims (1)

[Scope of Claims] 1. In an elevator door control device equipped with a device for detecting elevator door speed, the electric motor is separated from the electric motor drive circuit based on a door opening/closing command signal and a detection signal of a rotary encoder. An elevator door control device featuring: 2. The elevator door control device according to claim 1, wherein the electric motor is disconnected from the electric motor drive circuit after the door reaches a predetermined speed. 3. The elevator door control device according to claim 1, wherein the electric motor is disconnected from the electric motor drive circuit after a predetermined period of time has elapsed after the door has stopped. 4. The elevator door control device according to claim 1, wherein the electric motor is disconnected from the electric motor drive circuit after a predetermined time has elapsed after there is no door opening/closing command and the door has stopped.