JPH11292437A - Elevator door control - Google Patents

Abstract

(57) [Summary] [Problem] To prevent runaway of a door by instantly setting a door driving torque to 0 when a failure of a door speed detecting means is detected, and to increase or decrease a door closing force when a door is prying open. Protect users' safety. A motor detects a door position and a speed from a rotation speed of a door driving motor of an elevator, and converts a current by a motor current detecting unit into a torque, and applies a voltage applied to the motor in accordance with a deviation from the torque. And means for detecting a door position change amount and increasing or decreasing the door torque command value in accordance with the position change amount.

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, and more particularly to a door control device which increases the closing force of a door when the door is about to be opened due to mischief or the like during traveling of the elevator, thereby impairing the serviceability of the elevator. The present invention relates to an elevator door control device capable of preventing mischief without mischief.

[0002]

2. Description of the Related Art As a prior art, as disclosed in Japanese Patent Application Laid-Open No. 5-105348, there is a safety device in which when a car door is opened during traveling of an elevator, the elevator stops at the nearest floor and then stops.

[0003]

SUMMARY OF THE INVENTION The present invention detects opening of a door by movement of the door position and, after the detection, increases the closing force of the door, thereby preventing the door from being opened due to tampering, thereby making it easy and reliable. It is an object of the present invention to provide an elevator door control device capable of protecting a user and preventing a decrease in serviceability.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method of detecting a door position and a door closing end by means for detecting a door position and a speed from a rotation speed of an elevator door driving motor. By means of the operation of the means, when the door closing command is ON, it is detected that the door has moved in the opening direction, and means for increasing the torque command value in the closing direction is provided.

[0005] That is, in the elevator door control device of the present invention, when the door moves in the opening direction to open the door while the elevator is running, the torque in the closing direction is increased to call attention to the user. Since the continuation of the mischief is prevented and the opening of the door can be suppressed, the emergency stop of the elevator due to the opening of the door and the fall of the user can be surely prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a torque command value applied to a normal door motor when a door is closed, and FIG. 3 is a diagram when a door is forcibly opened. FIG. 4 is a diagram showing a torque command value applied to a door motor.

In FIG. 1, reference numeral 1 denotes an elevator control device for controlling the elevator to move up and down to a predetermined floor in response to a hall call or a door call of an elevator (not shown). The signal Pc is output to the door control device, and the abnormality detection signal Tre is input from the door control device.

Reference numeral 2 denotes a door control device which outputs a drive signal to a door driving motor for opening and closing the door in accordance with a command from the elevator control device 1. The door control device 2 is mainly composed of a computer, The arithmetic processing unit 21 for executing the arithmetic processing, the detected motor current Im
A / D converter 22 for A / D converting the data, arithmetic processing unit 21
Drive circuit 2 that outputs motor voltage command value Em for driving a motor based on a signal output from
3

The arithmetic processing unit 21 includes an I / O interface 211 for inputting and outputting data to and from an elevator control unit, a data bus 212, and a CPU 21 for executing arithmetic processing.
3, a ROM 214 for storing a door control program 2141 for controlling the opening and closing of the door, a RAM 215 having various time counters 2151 and an abnormality detection counter 2152, and an I / O interface 216 for inputting and outputting various data related to door opening and closing control. You.

Reference numeral 24 denotes a power supply for driving the door driving motor, 25 denotes an AC / DC converter, 26 denotes a smoothing capacitor, and 27 controls a voltage applied to the motor in response to a driving signal from a base drive circuit 23. A door motor driving element, a current detector for detecting a current flowing through the motor, a rotary encoder for detecting a rotary encoder signal (hereinafter referred to as a RE signal) for calculating a door opening / closing position and an actual door speed value, Reference numeral 30 denotes a door driving motor, 31 denotes a switch operating cam, and 32 denotes a door closing end detected by contact with the switch operating cam 31 when the door reaches the closing end, and outputs a closing end detection signal Sc. This is a closed end detection switch (CLS).

When the door reaches the open end, the door 33 detects the open end of the door by contact with the switch operation cam 31.
An open end detection switch (O) that outputs an open end detection signal So
LS) 1 is a door position and speed detecting means, 12 is a door motor, 13 is an open end detection switch (OLS), 34 and 35 are rotors which are rotated by rotation of a door driving motor 30, 3.
Reference numeral 6 denotes a strip which is wound around the rotating body 35 and moves by the rotation of the rotating body 35, 37 is a door rail for hanging and sliding the door, and 38 is connected to the strip 36 and moves in the horizontal direction with the movement of the strip. The door 39 is a door opening. L indicates the width of the door opening, and S indicates the door position that changes depending on whether the door is opened or closed.

Next, the operation of the elevator door control device according to this embodiment will be described with reference to FIGS.

FIG. 2 is a diagram showing the output of a torque command value applied to a normal door motor when the door is closed.

Here, the door closing command signal Pc indicates a state where an ON signal is being output from the elevator control device 1 to the elevator door control device 2, and the door opening command signal Po indicates a state where an OFF signal is being output. .

The door speed command value Vp represents a command value calculated by the arithmetic processing unit 21, and the door actual speed value Vd is an R.D. It represents a speed value calculated by the arithmetic processing unit 21 from the E signal. R. The E signal Vre represents a detection signal detected by the rotary encoder 11.

The motor voltage Em is supplied to the base drive circuit 23
Represents the voltage applied to the door drive motor 30 by driving the door motor drive element 27 with the motor voltage command value Em output from the controller 30.

First, the operation of the elevator door control device 2 when the door is operating normally will be described. From the elevator door control device 1 to the arithmetic processing device 21
When the door closing command signal Pc is input to the
In step 1, the door speed command value Vp is calculated based on the door closing command signal Pc.

A torque command value T is calculated from the difference between the door speed command value Vp and the door actual speed Vd. The torque command value T is converted into a current command value I, and the motor voltage command value E is calculated from the deviation from the motor current value Im detected by the current detector 28.
Find m. The calculated motor voltage command value Em is output to the door motor drive element 27 via the base drive circuit 23.

When the door reaches the closed end, the torque command value is increased to produce a predetermined closing force by turning on the CLS, and when the torque command reaches T1, the torque command is held at T1.

The arithmetic processing unit 21 calculates a motor current command from the torque command T1, and detects a difference between the motor current command and the actual motor current detected by the current detector 31 and the A / D converter 32. , A voltage command proportional to the difference is calculated, and the calculated motor voltage command value Em is output to the door motor drive element 27 via the base drive circuit 23. As described above, the arithmetic processing unit 21 causes the closing force of the door to follow the torque command generated as described above.

Here, if the door is intentionally opened due to mischief or the like, if the door is running while the elevator is running, there is a danger of falling, so it is necessary to prevent the door from being opened. FIG. 3 is a diagram showing transitions of a door speed command, a door speed, a speed signal, and a motor voltage command when the door is intentionally opened by mischief or the like when the door is completely closed.

In the present invention, when the door position detector detects that the door has moved in the opening direction, the processing unit 21 determines that the door has been opened, and closes the door in accordance with the amount of movement of the door position in the opening direction. Increase torque. By detecting that the door has moved in the closing direction by increasing the closing torque, the closing torque is reduced in accordance with the amount of movement of the door position in the closing direction.

As described above, the opening of the door can be prevented by increasing or decreasing the torque when the door is forcibly opened in accordance with the amount of movement of the door.

Further, it is possible to provide an elevator door control device having no problem in terms of safety and serviceability.

[0026]

According to the present invention, when an attempt is made to pry open a door, the door can be prevented from being opened by increasing the door closing torque in accordance with the amount of movement of the door in the opening direction. It is possible to provide an elevator door control device having no problem in terms of performance and serviceability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an elevator door control device according to an embodiment of the present invention.

FIG. 2 is a waveform diagram showing a door speed, a door position, and an output of a speed detecting means 11 in response to a speed command and a motor voltage command when a normal door is closed.

FIG. 3 is a waveform diagram showing transitions of a door speed command, a door speed, a speed signal, and a motor voltage command when the door is intentionally opened when the door is closed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Elevator control device, 2 ... Door control device, 21 ... Processing device, 29 ... Rotary encoder, 30 ... Door drive motor, 32 ... Door closed end detecting means, 33 ... Door open end detecting means, 38 ... Door, 2141 ... door control program.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takayuki Hashimoto 1070 Ma, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Mito Plant

Claims (2)

[Claims] 1. An elevator door driving motor rotational speed detecting means for detecting a position and a speed of a door,
In an elevator door control device provided with means for detecting the open end and closed end of a door, the closing torque is increased when the closing command is ON, and when the closing end detecting means detects that the door has moved in the opening direction during operation. A door control device for an elevator. 2. The elevator door control device according to claim 1, wherein the closing torque is increased or decreased in accordance with an increase or decrease in the amount of movement of the door in the opening direction.