JPH0425508Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automatic door opening/closing control device.

Conventionally, in electric automatic door opening/closing devices, when the switch to open the door is turned on while the door is operating in the closing direction, the door opens against the inertia of the closing operation, so the door is not driven. The drawback is that overload is applied to the motor, which damages the contacts of the motor and the switching control device. To overcome this drawback, variable speed motors are used, but these motors are expensive and Another disadvantage was that the control device was complicated and expensive.

In this design, when the switch to open the door is turned on during the closing operation, the power supply to the motor is cut off and at the same time a timer is activated, allowing the door to stop completely before the door starts the opening operation. It is an object of the present invention to provide an automatic door opening/closing control device which can automatically open/close the door using a general-purpose induction motor and a simple control device by configuring the opening/closing control device.

To explain the embodiment of this invention in detail based on the drawings, A indicates a sliding door, and the door A normally closes the left entrance/exit B.
When the start switch S-1 installed on the left side of the door A is operated, the switch S-1 outputs an output to the control device C, which causes the motor M to rotate forward, and is interlocked with the motor M. Door A is slid to the right to open doorway B, and after the door A is fully opened, it starts sliding to the left after a predetermined period of time has elapsed, and returns to the normal fully closed state again. has been done.

The opening/closing mechanism O of the door A is arranged on the upper right side of the door A, and a longitudinal rail 2 having an approximately I-shaped cross section is fixed to the wall of the door pocket 1. High-speed and low-speed rollers 5 and 6, which rotate in contact with belts 3 and 4, respectively, are rotated in forward and reverse directions by a motor M to open and close door A. , the low speed roller 6 and the low speed belt 4 are in contact with each other to drive the door A by friction, and when the door A is in the intermediate position, the high speed roller 5 and the high speed belt 3 are in contact with each other to drive the door A. ing. In addition,
7 shows a speed change mechanism interposed between the motor M and the high and low speed rollers 5 and 6;
The low speed roller 6 transmits the rotation of the motor M at low rotation speed.

In order to control the opening/closing operation of door A, a control device C is provided.
is arranged below the motor M, and the same device C
A commercial power source 8 of 100 volts AC is supplied to the device C, and the power from the power source 8 is controlled by a circuit inside the device C to drive the motor M in forward and reverse directions. The device C has a start switch S.
-1 and fully open and fully closed limit switch LS-1,
LS-2 is externally connected, and the fully open limit switch LS-1 has a normally closed contact, and when door A is fully opened, it contacts door A and opens the contact, and the fully open limit switch LS-1 2 has a normally open contact, and when the door is fully closed, the contact is closed by contact with the stopper 9.

The motor M has three terminals l, m, and n, and when power is supplied between the terminals l and m, it rotates in the forward direction.
When power is supplied between terminals m and n, it rotates in the opposite direction.

FIG. 3 shows the circuit configuration of the control circuit C. When the door A is fully closed, the start switch S-1
When turned on, relay R-1 operates and contact r-
11 is closed and fully open limit switch LS-1 is closed, relay R-2 is activated and contact r-2 is closed.
Since relay R-1 is closed, the operating state of relay R-2 is self-maintained even if start switch S-1 is turned off.
In addition, contact r-23 is closed by the operation of relay R-2, and contact r-41 is closed, so motor M
Electric power is supplied between terminals l and m of the motor M, and the motor M rotates forward to open the door A.

When the door A is fully opened, the full open limit switch LS-1 opens, and the self-holding of the relay R-2 is released, so the contact r-23 opens and the operation of the motor M is stopped.

When the self-holding of relay R-2 is released, normally closed contacts r-22, r-31, and r-12 are closed, timer T-1 is activated, and after a preset time elapses, contact t is closed. -11 is closed, power is supplied to the motor M through the terminals m and n, and the door A is operated to close by reverse rotation of the motor M. When door A is fully closed, fully closed limit switch LS-2 closes, relay R-3 operates, contact r-31 opens, timer T-1 stops operating, and contact t-11 opens and motor M
The door A is held in a fully closed state to wait for the next activation of the start switch S-1.

In particular, when door A is closed, start switch S
To explain the operation of the control device C when the timer T-1 is turned on, during the closing operation, the contact t- of the timer T-1 is
12 and contact r-32 of relay R-3 are both closed, so relay R-4 is activated and contact r-41 of the same relay is closed, making relay R-4 self-holding. Therefore, during the closing operation, the contact r-41 of the relay R-4 is open and the contact r-42 is closed.

Therefore, during the above condition, i.e. occlusion operation,
When start switch S-1 is turned on, relay R-2 is self-held, relay contact r-22 immediately opens, timer T-1 stops operating, and timer contact T-11 opens to connect motor M. power supply is cut off. Furthermore, the operation of relay R-2 closes the relay contact r-24 and starts the slow timer T-2, and the timer T-2 closes the relay contact r-24 and starts the delay timer T-2. 2
Since the motor M is closed, the start switch S-
After the above settling time has elapsed since 1 was turned on,
This starts normal rotation.

Note that even after the power supply to the motor M is cut off, the door A continues to move due to the inertia of the door A, and the motor M starts moving before the door A stops moving.
If the power supply terminal is switched to reverse the rotation direction of the motor, the motor M will start against the same inertia, and the motor M and the control device C, etc., will be damaged by excessive current due to overload. be.
Therefore, in this invention, the settling time of the delay timer T-2 is set to the time from when the power supply is cut off until the door A stops, and by setting the same time, damage to the motor M and the control device C can be prevented. has been done.

Note that even if the starting switch S-1 is turned on during the opening operation, the opening operation will continue without any problem since the relay R-2 is already self-holding.

However, in the opening/closing mechanism O of the door A shown in the embodiment, the high and low speed rollers 5 and 6 driven by the motor M and the high and low speed belts 3 and 6 that are in contact with each other, respectively.
Since the door A is configured to be opened and closed by the frictional action with the door A, as shown in FIG. 4, when the start switch S-2 is turned on, the relay
A circuit configured to output an output so that contact r of is activated and door A is immediately opened even if it is closed.
Even if the opening/closing operation is controlled by C', the excessive force and torque applied to the motor M due to the sudden change in direction of operation of the door A will be applied to the rollers 5, 6, the belt 3,
The slippage between the opening and closing mechanism O and the circuit C' will not be damaged.

Furthermore, if the start switch S-2 output continues while the door A is fully open, the relay RX will start the timer T-3.
This prevents it from starting.

According to this invention, if the start switch is operated while the door is in the closing operation, the delay timer is configured to stop the door operation and then start the opening operation. This has the effect of preventing overload and damage.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory diagram of an automatic door having an opening/closing control device according to the present invention, FIG. 2 is an explanatory diagram of the opening/closing mechanism, FIG. 3 is a circuit diagram of the same control device, and FIG. 4 is a diagram of the automatic door. A circuit diagram to prevent damage to the opening/closing mechanism and circuit. A...door, C...control device, M...motor, R-1 to 4...relay, S-1...start switch, T-1...timer, T-2...delay timer.

Claims (1)

[Scope of utility model registration request] In a control device C for a door A configured to automatically open and close a door A by the forward and reverse rotation of a motor M, a start switch S-1 for opening the door A is activated when the door A is closed. If output occurs, immediately cut off power supply to motor M,
Moreover, the automatic door opening/closing control device is configured to start the power supply for the opening operation after the time elapses from the power supply stop to the coasting of the door A being stopped by the delay timer T-2. .