JPS60248587A - Controller for elevator door - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an elevator door control device, and in particular, it applies current to the door drive motor even when the car is running or when the door is waiting to be closed, so that the door can be fully opened or closed. This invention relates to a control device that applies a pressing force to a door when it is in a fully closed position.

[Prior Art] Fig. 1 shows a conventional elevator door control device similar to that shown in Japanese Patent Application No. 55-77403. The three-phase induction motor (2U), (2V) is a triac consisting of bidirectional triacs installed in the U-phase and V-phase supply paths of three-phase AC power supplies U, V, and W, and this triac is a speed control circuit. (3) controls the firing angle, thereby controlling the electric motor (1) at variable speed.

Therefore, in (4) and (5), when the elevator car door driven by the electric motor (1) comes to the end of its stroke, that is, the door close end and the door open end, respectively, the light emitting diode is connected to the light receiving transistor. A door closed end detector and a door open end detector are made of a photocoupler that detects the end after the light is blocked, and when detecting the end, respectively,
Since the transistors 7 and Tr2 are cut off, the current from the DC power supply flowing through the resistors R1 and R2 is reduced to the lower level D1. It flows through D2 and resistor R3 and makes transistor Tr3 conductive.
Therefore, at this time, by passing current through the diodes D3 and D4, the above-mentioned trigger (2U), (
TRIAC (6U) each connected in parallel to 2V)
, resistor Ru, triac (8U), and resistor Rv in series, each triac (130) and (ev) are made conductive and a constant current is passed through the motor (1) to perform a pressing operation to prevent the door from moving in the opposite direction. is being done.

In other words, in the opening/closing control of the car door, when the car door comes just before the end of its stroke (the end of the door closing and the end of the door opening), the electric power supply to the motor is cut off, so the door is moved by the rubber door stop installed at the entrance. However, even if the power supply to the motor is cut off just before the end of opening or closing the door, the door will still move by inertia and will collide with the rubber doorstop, and will be repelled by the rubber doorstop and will not fully open or close. It may not be possible to fully close it. On the other hand, if the power supply to the electric motor is cut off at the end of the door travel, passengers inside the car may force the car door open while the car is running, causing the car to suddenly stop. In order to prevent this, the above configuration applies current to the door drive motor even when the car is running or when the door is waiting to be closed, and applies a pressing force to the door when the door is in the fully open or fully closed position. being done.

However, in the above configuration, the door closing end detector (
4) and the door open end detector (5) are each 3 m from the end position.
The terminal position is detected immediately before m~10+am, and the door pressing operation is immediately started immediately before the terminal position (time Tn in Fig. 4). Therefore, after Tn (
Immediately starting the pressing operation after detecting the end position) causes the rotational speed of the electric motor (1) to increase as shown in FIG. 2, causing a temporary increase in the opening/closing speed of the door, which is dangerous.

[Summary of the Invention] The present invention has been made in order to eliminate the drawbacks of the conventional ones as described above.The present invention temporarily increases the speed of the motor by delaying the pressing operation for a predetermined period of time using a timer means after detecting the end position. To provide an elevator door control device that can avoid such problems and ensure safety.

- [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on FIG. 1, in which the same parts as in FIG. 3 are denoted by the same reference numerals. In Fig. 1, C is a capacitor that forms an integral circuit together with resistor R3, and the detection signal of detectors (4) and (5) that detects when the elevator door is at its stroke end position is sent to the push control means. In other words, the conduction of the transistor Tr3 is delayed for a predetermined period of time, and constitutes a delay means for the pressing operation. Others are the same as before.

That is, in the above configuration, by delaying the transmission of the end detection signal for a predetermined period of time, the pressing operation is started after the door is completely closed and fully opened. After the end is detected, the rotation speed is controlled without increasing, and the safety of the pressing operation can be ensured.

In the above embodiment, the start timing of the pressing operation can be varied by selecting the capacitance of the capacitor C, and it goes without saying that this delay means can also be realized by using another timer circuit. Furthermore, it goes without saying that the pressing force is determined by the selection of the resistances Ru and Rv.

[Effects of the Invention] As described above, according to the present invention, the transmission of the door end position detection signal to the pressing control means is delayed, so that the rotation speed of the electric motor does not temporarily increase due to the pressing operation. It is possible to avoid this and ensure safety when applying pressing force to the door.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram according to an embodiment of the present invention, and FIG. 2 is a circuit diagram according to an embodiment of the present invention.
3 is a circuit diagram of a conventional example, and FIG. 4 is an operation characteristic diagram of FIG. 3. (1)...Electric motor, (4) and (5)...Door closing and door open end position detector, (6U) and Ru, (eV) and Rv...Triac and resistance of pressing means, R3 and C...resistance and capacitor of delay means. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa Figure 1 Figure 3 Figure 4 Time: T Figure 2 Katama T Procedural amendment (voluntary) 1□60.6,19□ 2. Name of invention Elevator door control device 3. Relationship with the person making the amendment Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (6
01) Hitoshi Katayama, Representative of Mitsubishi Electric Corporation, Department 4, Agent 5, Detailed explanation of the invention in the specification to be amended. 6. “Resistance Ru, triac (BU
) J is replaced by “resistance Ru, triac (eV) J
and correct it. that's all

Claims (1)

[Claims] An elevator door control device comprising: end position detection means for detecting when an elevator door is at its stroke end position; and pressing control means for applying a pressing force to the door based on the detection signal. 1. A control device for an elevator door, comprising a delay means for delaying transmission of a signal to the push control means for a predetermined period of time, thereby delaying a push operation.