JPH0228667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that automatically opens and closes a door by rotating an electric motor in the forward and reverse directions in relation to the movement of a passerby.

[Conventional technology]

In an automatic door device using a single-phase motor, normally a single-phase alternating current is passed through the first winding of the motor to rotate the motor in the door opening direction, while a single-phase alternating current is passed through the second winding of the motor to close the door. It is rotated in the direction.

Conventional deceleration methods involve inserting a diode and a variable resistor connected in parallel into the power supply circuit to the second winding of the motor, thereby changing the rotational speed of the motor. There were frequent cases of variable resistors generating high heat and breaking.

Also, deceleration methods using semiconductor control elements such as C-MOS, microcomputers, and phototriacs in the motor drive control circuit are known, but conventional devices have relatively complex circuit configurations. Control of the rotation of the door in the closing direction and deceleration rotation control of the door in the closing direction are performed using separate triaxes. Increasing the number of semiconductor products such as triacs, which are more expensive than general circuit components, increases the production cost of the entire circuit when including its protection circuit, and makes it difficult to detect the cause of a failure. .

In the conventional deceleration control device disclosed in Japanese Unexamined Patent Publication No. 47-20618, a triax is inserted into the reverse side power circuit of a single-phase motor, and a charging circuit consisting of a resistor, a diode, and a capacitor connected in series is connected to the triax. Connect the diode and capacitor in parallel to the power circuit, connect the connection point of the diode and capacitor to the gate terminal of the triax via a trigger diode, and connect the diode and capacitor with a variable resistor in parallel with the resistor and diode. A deceleration switch is connected in parallel with the diode.

In this deceleration control device, when the deceleration switch closes during the door closing operation, the phase angle of the AC voltage applied to the trigger diode changes significantly, and the phase angle at which the triac conducts also changes significantly, causing the rotation speed to change. However, even from the start of the door closing operation until the deceleration switch closes, the trigger diode is connected to the gate terminal of the triax.
Since the voltage that breaks over the trigger diode changes intermittently, the conduction state of the triac also becomes intermittent.

Therefore, compared to the case where the triax is continuously conducted, in this deceleration control device, the door closing speed before the deceleration switch is activated must be correspondingly slower, and the total time required for closing the door becomes longer. Therefore, if the door has a long opening/closing stroke, the closing of the door will be delayed longer than necessary.
There is a problem of cold and warm air escaping due to excessive opening.

[Problem to be solved by the invention]

Therefore, an object of the present invention is to shorten the total time required for closing the door by rotating the electric motor at full speed until shifting to decelerated rotation during door closing operation, and to reduce the total time required to close the door at full speed in the closing direction. Since control and closing direction deceleration rotation control are performed through a single triax, the overall manufacturing cost of the control circuit can be reduced, and the cause of failure can be easily detected and repaired. To provide an automatic door device capable of silently and fully closing a door by sustaining decelerated rotation for a certain period of time by electric discharge.

[Means to solve the problem]

The automatic door device _of the present invention will be described below using the reference numerals in the attached drawings _. Connect the other ends of the first winding M ₁ and the second winding M ₂ to the other terminal of the AC power supply via triax TH ₁ and triax TH ₂ , respectively, and the circuit is closed when door 1 is fully closed. Insert the door open switch RS ₁ , which is opened at the final stage of the door opening operation, into the gate circuit of the triax TH ₁ , and the door closing switch RS 1, which is opened when the door 1 is fully closed, and is closed during the door opening operation. Insert RS ₂ into the excitation circuit of relay H, and connect slow door close switch RS ₃ to relay S, which is open when door 1 is fully closed and closes before door close switch RS ₂ during the door opening operation. Passer detection switch MT, which is inserted into the excitation circuit and is open when door 1 is fully closed and closed when a passerby arrives, is inserted into the excitation open circuit of relay T, and capacitor C ₃ and variable resistor R ₆ are connected. Normally open contact of diode D ₂ and relay S
A charging/discharging circuit 14 in which _S1 , the normally closed contact _H2 of the relay H, and the normally closed contact _T2 of the relay T are connected in series is connected in parallel to the triax _TH2 , and connected to the other end of the second winding _M2 . Connect between the other terminal of the AC power supply AC,
The connection point between the variable resistor R ₆ and the capacitor C ₃ and the gate terminal of the triax TH ₂ are connected via the trigger diode TD ₁ , and the normally closed contact H ₂ of the relay H and the normally closed contact T ₂ of the relay T are connected. Connect the connection point and the gate terminal of the triax TH ₂ via the normally open contact H ₁ of the relay H, and connect the normally open contact T ₁ of the relay T in series with the opening switch RS ₁ to the gate circuit of the triax TH ₁ . The normally closed contact of relay H is connected to the excitation circuit of relay S in series with slow closing door switch RS ₃ .
Insert H ₃ and capacitor C ₂ in the coil of relay S
are connected in parallel.

〔Example〕

In the illustrated embodiment, the door opening switch RS ₁ , the door closing switch RS ₂ and the slow closing switch RS ₃ are all configured as reed switches. These switches are operated by a magnet 10 attached to a hanger 9 at the upper end of the door 1. The passerby detection switch MT consists of an ordinary Matsuto switch. In the drawings, reference numeral 2 indicates a rail;
Reference numeral 3 indicates a guide pulley, 4 indicates an intermediate reduction pulley, 5 indicates a driving pulley, 6 indicates a transmission back belt, 7 indicates a transmission belt, and 8 indicates an electric motor. Reference numeral 11 indicates a controller cover.

[Effect]

When a passerby gets on the mat in front of the door, the passerby detection switch MT is closed and charging of the capacitor _C1 of the timer circuit 12 is started, while the transistor Tr is conductive, so an exciting current is applied to the coil of the relay T. flows, opening relay contact _T2 ,
Let T ₁ be a cycle. Due to the closing of relay contact T ₁ ,
Triax TH ₁ is turned on through door opening switch RS ₁ and single-phase alternating current flows through motor first winding M ₁ , so that motor 8 rotates in the door opening direction.

During the door opening operation, the slow closing switch RS ₃ is first activated.
is switched and becomes a closed circuit, so an exciting current flows through the coil of the relay S and closes the relay contact _S1 . After that, the door closing switch _RS2 is switched to close the circuit, so an exciting current flows through the coil of the relay H, opening the relay contacts _H2 and _H3 , and closing the contact _H1 . Therefore, no current flows through the coil of the relay S, and the relay contact _S1 is opened. In this way, when the door opening switch RS ₁ is opened at the final stage of the door opening operation, the triax TH ₁ is turned off and single-phase alternating current no longer flows through the first winding M ₁ , and the motor 8 stops rotating. do. For this reason, the door 1 is quietly fully opened.

A passerby gets off the mat to pass through the doorway,
Even if the passerby detection switch MT is opened, the transistor Tr remains conductive until the capacitor _C1 of the timer circuit 12 finishes discharging, and the exciting current continues to flow through the coil of the relay T. ing. During this time, the door 1 is stopped at the fully open position, allowing passersby to pass through the door with sufficient time.
It can be changed arbitrarily by adjusting _R1 .

When transistor Tr becomes non-conductive, relay T
Since no excitation current flows through the coil, relay contact _T2 is closed and contact _T1 is opened. Closing of relay contact T ₂ turns on another triax TH ₂ through relay contact H ₁ , causing the second
Single-phase alternating current flows in winding M ₂ . The electric motor 8 rotates at full speed in the door closing direction. When the closing of door 1 progresses to a certain stage, door closing switch RS ₂ is opened.
Excitation current no longer flows through the coil of relay H, relay contacts H ₂ and H ₃ are closed, and contact H ₁ is opened.

Therefore, an exciting current flows through the coil of the relay S, closing the relay contact _S1 , and at the same time, the push circuit 13
Charging of capacitor _C2 starts. Further, due to the opening of the relay contact _H1 , the triax _TH2 is turned off, so that single-phase alternating current no longer flows through the second winding _M2 , and the motor 8 stops rotating. At the same time, the capacitor _C3 is charged through the resistor _R5 , diode _D2 , and variable resistor _R6 of the charging deceleration drive circuit 14.
Trigger diode until capacitor C ₃ discharges
Since TD ₁ does not reach the breakover voltage, triac TH ₂ remains non-conducting.

Capacitor C ₃ discharges and trigger diode
When TD ₁ reaches the breakover voltage, the triax TH ₂ is turned on and a phase-controlled single-phase alternating current flows through the second winding M ₂ , so that the motor 8 rotates at a reduced speed in the door closing direction. This rotation speed can be arbitrarily changed by adjusting the variable resistor _R6 . Slow door closing switch at the final stage of door closing operation
Even after RS ₃ is opened, an exciting current flows through the coil of relay S while capacitor C ₂ of push circuit 13 is being discharged. In this way, the conduction state of the triax TH ₂ is maintained, so the deceleration drive rotation of the electric motor 8 continues, and the door is quietly and fully closed.

In this embodiment, since the trigger diode _TD1 and the variable resistor _R6 are inserted in series with the gate of the triax _TH2 , a large current does not flow through the variable resistor _R6 , and damage to the variable resistor due to high heat can be prevented. Also,
Variable resistor _R6 with resistor _R5 and diode _D2 in parallel
Since it is connected to , the adjustment range of variable resistor R ₆ is narrowed and adjustment is made easier. Also,
Unlike conventional power supply circuits in which a diode and a variable resistor are inserted in parallel to adjust the rotation speed of the motor, the rotation speed of the motor can be freely adjusted using a limited variable resistance. Good door opening/closing operation can be obtained.

〔Effect of the invention〕

As described above, in the automatic door device of the present invention, the excitation current of the relay H is cut off by opening the door closing switch RS ₂ during the door closing operation, and the triact TH ₂ is turned off by opening the relay contact H ₁ . The motor 8 temporarily stops rotating, but the capacitor _C3 is charged and the trigger diode
Since triac TH ₂ is kept non-conducting until the breakover voltage of TD ₁ is reached,
When the electric motor 8 shifts from full speed rotation in the door closing direction to deceleration rotation in the door closing direction, no synchronization phenomenon occurs in the electric motor.

Further, in the automatic door device of the present invention, the variable resistance R ₆
The connection point of the capacitor _C3 and the gate terminal of the triax _TH2 are connected via the trigger diode _TD1 , and the connection point of the normally closed contact _H2 of the relay H and the normally closed contact _T2 of the relay T is connected to the triax.
Since the gate terminal of TH ₂ is connected through the normally open contact H ₁ of relay H, the passerby detection switch
When MT is opened and contact _T2 of relay T is closed, a try-out occurs through contact _H1 of relay H.
TH ₂ is turned on and the second winding of motor 8
Single-phase alternating current that is not phase-controlled flows continuously through _M2 , and the motor 8 is at full speed from the start of the door closing operation to the time when the door closing switch _RS2 is opened and shifts to decelerated rotation. Since the door rotates in the closing direction, the total time required to close the door can be shortened, and even for doors with long opening/closing strokes, the closing of the door is not delayed unnecessarily, and cold or warm air is lost due to excessive opening. can be prevented as much as possible.

Further, in the automatic door device of the present invention, as described above, the trigger diode TD ₁ and the normally open contact H 1 of the relay H are connected in parallel to the gate terminal of the triax TH ₂ , and the normally open contact H ₁ of the relay H is connected in series to the trigger diode TD ₁ . By selectively opening and closing the normally closed contact _H2 of the relay H and the normally closed contact _H1 by opening the closing switch _RS2 , the motor 8 is controlled to rotate at full speed in the closing direction and at reduced speed in the closing direction. Control in a single try
Since this is done via TH ₂ , the overall manufacturing cost of the control circuit can be reduced, and it is easy to detect and repair the cause of a failure.

In addition, in the automatic door device of the present invention, a relay H is connected in series with the slow closing door switch RS ₃ to the excitation circuit of the relay S.
Insert the normally closed contact _H3 and connect the capacitor to the relay S.
C ₂ are connected in parallel, and even after the slow closing switch RS ₃ is opened at the final stage of door closing, the decelerated rotation continues for a certain period of time due to the discharge of capacitor ₂ , so the door can be closed quietly. can be fully closed.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of an automatic door using an automatic door device according to an embodiment of the present invention, with the door in a fully closed position. FIG. 2 is an electrical circuit diagram of the automatic door device, showing the door in a fully closed state. 1...Door, 2...Rail, 3...Guide pulley, 4
... Intermediate reduction pulley, 5... Driving pulley, 6... Transmission back belt, 7... Transmission belt, 8... Electric motor, 9...
Hanger, 10...Magnet, 11...Controller cover, 1
2...Timer circuit, 13...Push circuit, 14...Charging/discharging circuit, _M1 ...Motor first winding, _M2 ...Motor second winding, _TH1 ...Trial for opening direction rotation control,
TH ₂ ...triax for both full-speed rotation control in the closing direction and deceleration rotation control in the closing direction, C ₄ , R ₇ ...abnormal voltage absorption circuit, C ₅ , R ₈ ...abnormal voltage absorption circuit, R ₉ , L...
Phase advance capacitor discharge current peak rise rate prevention circuit, _C6 ...phase advance capacitor, _D1 ...back electromotive force generation protection circuit between relay terminals.

Claims (1)

[Claims] 1 Connect one end of the first winding M ₁ and the second winding M ₂ of the single-phase motor 8 to one terminal of the AC power supply AC, and
The other ends of the winding M ₁ and the second winding M ₂ are connected to the other terminal of the alternating current power supply AC via triax TH ₁ and triax TH ₂ , respectively, and the circuit is closed when the door 1 is fully closed, and the door opens. Insert door open switch RS ₁ , which is opened at the final stage of the operation, into the gate circuit of triax TH ₁ , and connect door closing switch RS ₂ , which is opened when door 1 is fully closed and closed during the door opening operation, to relay H. Insert into the excitation circuit of relay S a slow-close door switch RS ₃ , which is open when door 1 is fully closed and closes before door-close switch RS ₂ during the door opening operation. A passerby detection switch MT, which is open when door 1 is fully closed and closed when a passerby arrives, is inserted into the excitation open circuit of relay T, and capacitor C ₃ , variable resistor R ₆ , and diode D ₂ are connected.
and the normally open contacts of relay S S ₁ and the normally closed contacts of relay H
A charging/discharging circuit 14 in which H ₂ and the normally closed contact T ₂ of the relay T are connected in series is connected in parallel with the triax TH ₂ and between the other end of the second winding M ₂ and the other terminal of the AC power source AC. Connect variable resistor _R6 and capacitor to
The connection point of C ₃ and the gate terminal of the triax TH ₂ are connected via the trigger diode TD ₁ , and the connection point of the normally closed contact H ₂ of the relay H and the normally closed contact T ₂ of the relay T is connected to the triax TH _2. Connect the gate terminal of the relay H through the normally open contact _H1 of the relay H,
Opening switch in gate circuit of triax TH ₁
Connect normally open contact T ₁ of relay T in series with RS ₁ , insert normally closed contact H 3 of relay H in series with slow closing door switch RS ₃ into the excitation circuit of relay S, and connect normally open contact T ₁ of relay T in series with relay S.
Automatic door device with capacitor _C2 connected in parallel.