JPH0224987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic door opening/closing control device, and more particularly to an automatic door opening/closing control device capable of compensating for a failure function when a main control device fails.

The garage door opening/closing device is as shown in Figure 1.
A main body 1 with a built-in drive device, a rail 2 connected to the main body 1, and a roller chain guided by the rail 2 and operated by the driving force of the main body 1 to engage with and move along the rail 2. The main part of the trolley 4 is horizontally moved. The main body 1 is hung from the ceiling of the garage using a hanging fitting, while the end of the rail 2 is fixed to a part of the garage by a header bracket 5. On the other hand, the garage door 6 is generally divided into several parts, connected to each other, and opened and closed along door rails 7 provided on both sides. Further, the weight of the garage door is balanced by a door balance spring 8, so that the garage door can be opened and closed manually. A door bracket 9 is fixed to the garage door 6 in the above state, and the door bracket 9 and the trolley 4 are rotatably connected via a door arm 10. As a result, the garage door 6 is opened and closed along the door rail 7 in conjunction with the trolley 4 which moves horizontally along the rail 2 by the roller chain operated by the driving force of the main body 1. Power is supplied to the main body 1 via a power cable 11. Further, an operation command to the main body 1 can be issued by pressing a push button switch 12 attached to the wall of the garage, or by receiving a signal such as a radio wave by a control device 13 with a built-in receiver. put out. In addition, in the event that the garage door opening/closing device becomes inoperable due to a power outage, etc., the connection with the roller chain trolley 4 can be removed using the release string 14, and the garage door 6 can be opened by hand. It can be opened and closed.

First, the structure of the main body of the garage door opening/closing device will be explained with reference to FIGS. 2 and 3. Figure 2 is a longitudinal side view;
FIG. 3 is a partially cross-sectional top view.

Motor 1 fixed to the lower side of main body frame 15
6 is transmitted from a motor pulley 17 fixed to a motor shaft 16-a to a large pulley 19 via a V-belt 18. Furthermore, the large pulley 19
rotation is transmitted to the sprocket 21 via the sprocket shaft 20. The sprocket 21
A roller chain 3 is engaged with the roller chain 3. The roller part of the roller chain 3 is connected to the chain guide (A) 22 and the chain guide (B) from both sides within the main body frame 15.
23, guided by chain guide (C) 24.
The rail 2 is fixed to the frame 15 with a rail fixing fitting 25 so that there is no step or gap in the groove formed by the chain guide (A) 22 and the chain guide (C) 24. The roller portion of the roller chain 3 is guided by the rails 2 on both sides.

On the other hand, the roller chain 3 wound by the sprocket 21 is stored in the chain guide.
(A) 22 and the chain guide (B) 23, and the chain storage groove 27-a of the chain storage case 27, which is fixed without any step or gap.

With the above configuration, the sprocket 21 is rotated by the rotational drive of the motor 16, and the roller chain 3 is reciprocated along the rail 2.

Next, the limit mechanism for limiting the upper and lower limits of the opening/closing operation of the garage door 6, that is, the amount of horizontal movement of the trolley 4 explained with reference to FIG. 1, will be described below. The amount of movement of the roller chain 3 is converted into the amount of movement of a pulley rack 28 provided on the outer periphery of a large pulley 19 that rotates at the same rotation speed as the sprocket 21. The amount of movement of the pulley rack 28 is transmitted to an upper limit switch 30 and a lower limit switch 31 via a pinion 29 that meshes with the pulley rack 28.

The upper limit switch 30 and the lower limit switch 31 are provided with an upper limit point adjustment knob 32 and a lower limit point adjustment knob 33, respectively, so that the upper limit point and the lower limit point can be freely adjusted from outside the main body.

If the garage door hits an obstacle while descending, it must be detected quickly for safety reasons and must be reversed, i.e., raised; must be detected and stopped. The obstacle detection mechanism described above will be explained below. Part of the chain guide groove formed by the chain guide (A) 22, the chain guide (B) 23, and the chain guide (C) 24 is formed into a curved path, and a compressive force is applied to the roller chain 3 when the door is lowered; An obstruction detection fitting 34 is provided which is moved by the force generated by each of the tensile forces applied when the door is raised. The compression force of the obstruction spring 35 that restricts the movement of the obstruction detection fitting 34 can be changed freely by moving the spring presser plate 37 by turning the obstruction operation force adjustment screw 36. . Further, the obstruction detection switch 52, which is turned on and off by the movement of the obstruction detection metal fitting 34, detects the above-mentioned obstacle and causes the door to rise when the door is lowered and to stop when the door is raised. do.

Further, a lamp 38 for illuminating the inside of the garage is provided, and the light is turned on and off in conjunction with the movement of the garage door. Further, a controller 39 for controlling the motor 16 and the lamp is fixed in the frame 15, and a body cover 40 and a lamp cover 41 are used to control the motor 16 and the large pulley 1.
9. Cover the lamp 38. Incidentally, the lamp cover 41 is made semi-transparent so that the light from the lamp 38 passes through and brightly illuminates the inside of the garage. Having explained the main body structure of the garage door opening/closing device above, we will now explain the rail and trolley parts in Figures 4 and 5.
This will be explained using figures. As shown in FIG. 4, the cross-sectional structure of the rail 2 is formed from a thin iron plate or plastic plate, and the trolley 4 is slidably guided on the outer periphery of the rail. Furthermore, the roller portion of the roller chain 3 is sandwiched between the rails 2 from both sides, and the roller chain 3 is
The reciprocating motion is guided in a straight line. Next, the trolley 4 and the roller chain 3 are connected by a connecting metal fitting fixed to the tip of the roller chain 3 and installed in the groove of the roller chain attachment 3-a, which is guided by the rail 2 in the same way as the roller chain 3. 4-a. The connecting fitting 4-a is located inside the trolley 4 and can slide up and down, and is normally pushed upward by the force of a spring or the like.
and the roller chain 3 are in a connected state. In the event of a power outage, etc., if you want to separate the garage door opening/closing device from the door and open/close the door manually, pull the connecting fitting 4-a downward and remove it from the roller chain attachment 3-a. Leave and do it. Next, the door arm 10 for transmitting the operation of the trolley 4 to the door is composed of an L-shaped door arm 10-a and a straight door arm 10-b, each of which can be freely adjusted in length depending on the positional relationship between the door and the rail. are connected by changing. One end of the door arm 10 is attached to the trolley 4
The other end is connected to the door 6 via a door bracket 9 shown in FIG. The door arm 10 and the trolley 4 are connected by providing a long groove 4-b in the trolley 4.
This is done by inserting the pin 4-c into the long groove 4-b. The pin 4-c is normally pressed into the state shown in FIG. 4 by a spring or the like. This absorbs the impact when the door collides with an obstacle while lowering.

In addition, the garage door opener may have snow on the floor.
It is desirable to take measures to prevent the door from being reparsed by obstruction detection when the door is lowered, even if it is piled up by ice or the like, or if there is a small item such as a water hose. In other words, it is desirable that the robot not turn around and stop even if it detects an obstacle at a height of 2 inches or less above the floor surface. Trolley 4 and door 6 in this case
The difference in the amount of movement is absorbed by the long groove 4-b.

Let's consider the circuit for controlling the garage door as described above.

The circuit is required to accurately process inputs from an upper limit switch, a lower limit switch, which are door state detection means, and an obstruction detection switch, which is an obstacle detection switch, to control the drive device.

Therefore, even if the door state detection means is normal, if the command output to the drive device is malfunctioning, there is a high possibility that the door will become uncontrollable.

If control is lost, the following serious accidents will occur.

When the door is moved until it is locked, motor 16
The locking torque is applied to the obstacle, causing damage to the obstacle.

This condition will continue until the thermal protector of the motor 16 is activated, and in the worst case, the motor 16 will burn out, creating a risk of fire.

If the obstacle were a human being, there is a good chance that it could cause death.

Conventionally, countermeasures have been taken using the drive force transmission method of the drive device. For example, power is transmitted through a belt and a pulley, and an adjustment mechanism is provided to apply a certain tension to the belt, and if a force exceeding a certain level is generated, the belt slips. However, with this method, there is a possibility that the belt may be worn out and cut due to idle rotation of the motor 16. Moreover, the mechanism becomes complicated and expensive. In addition, when pressing against an obstacle with a constant force, the motor 16
It continues until the thermal protector works, which is undesirable. In addition, it is not preferable to energize the motor until the thermal protector is activated, as this will shorten the life of the motor 16.

An object of the present invention is to provide safety by providing an auxiliary control circuit separately from the main control circuit as a backup countermeasure in the event of a failure of the main control circuit, and controlling the overall judgment of whether or not the main control circuit is performing a predetermined process. Our goal is to provide a highly optimal automatic door opening/closing control device.

The main control circuit performs predetermined processing based on inputs from the door state detection means and door operation inputs. An example is shown below.

(1) Ascending → Upper limit detection → Stop (2) Descending → Lower limit detection → Stop (3) Ascending → Obstruction detection → Stop (4) Descending → Obstruction detection → Ascent (5) Door Repeated operation → stop based on operation input.

As described above, the movement state of the door changes depending on the input signal. By paying attention to whether or not there is such a change, it is possible to determine whether the main control circuit is normal.

The present invention provides a door opening/closing device including a drive device for driving a door, a connecting means for connecting the drive device and the door, and a door opening/closing device that responds to input signals from a door upper limit switch, a door lower limit switch, and an obstruction detection switch. The automatic door opening/closing control device includes a main control device for giving a predetermined command signal to the door opening/closing device, in which, in addition to the main control device, signals from the door upper limit switch, the door lower limit switch, and the obstruction detection switch are provided. A logical judgment is made by inputting an input signal and the predetermined command signal output from the main control device, and if the main control device does not output the predetermined command signal in response to the input signal, the door opening/closing device is opened/closed. The present invention is characterized in that an auxiliary control circuit is provided that controls operation independently of the main control device.

Specifically, when the main controller does not output a predetermined command signal, the auxiliary control circuit stops the door opening/closing operation by the door opening/closing device if it is in the opening operation, and stops the door opening/closing operation when the door opening/closing device is in the closing operation. If so, the door opening/closing device is controlled to perform an opening operation.

Next, regarding examples, FIGS. 6, 7, and 8.
This will be explained using FIG. 9, FIG. 10, and FIG. 11.

FIG. 6 shows a block diagram of the control section according to the present invention. A state detection means 300 comprising an upper limit switch 30, a lower limit switch 31, and an obstruction detection switch 52, a main control circuit 301 that controls the motor 16 that drives the garage door based on the detection input, and a command or drive that drives the garage door. An auxiliary control circuit 302 is provided to monitor the status.

In this embodiment, the logic processing checked by the auxiliary control circuit is the processing related to the ascending or descending command and the obstruction detection switch input.
If an abnormality is determined by this process, relay contact 30
3 to the "open" state to stop energizing the motor 16.

Next, the main control circuit 301 will be explained below.

In FIG. 7, 12 is a push button switch for commanding door opening/closing operations, 201 is a relay contact output for commanding door opening/closing operations from the radio receiving device, 30 is a door upper limit switch, 31 is a door lower limit switch, and 52 is an obstruction detection switch. , 205 is a power supply reset circuit that generates a reset signal when the power is turned on, 206, 207, 250
is a monostable multivibrator, 208 is a J-K master slave flip-flop, 209 is a
A timer circuit using NE555 (manufactured by Signtech) etc., 210 and 211 are D type flip-flops, 212 is an integrating circuit, 213 is a differentiating circuit 214
~222 is a NOT element, 223 is a 2-input OR element,
224 to 228 are 2-input AND elements, 229, 2
30 is a 4-input NOR element, 231 is a 2-input NAND
element, 232 is a 3-input AND element, 251 is 3
Input NAND element, 233 is a control power transformer,
234 is a diode stack, 235 is an IC regulator for control power supply, 236 to 238 are relay drive transistors, 239 to 241 are relay coils, 242 to 244 are the relay contacts, 16 is a door opening/closing drive motor, and 38 is a lamp. It is.

The circuit operation will be explained below with reference to time charts shown in FIGS. 8 and 9. When the power is turned on to this circuit, the transformer 233, the diode stack 234, and the IC regulator 23
A control power supply VDD is supplied via 5. Then, the power supply reset circuit 205 integrates the rise of the VDD and outputs a reset pulse through the NOT element 215. The reset pulse is applied to the NOT element 21.
6 to reset the JK master slave flip-flop 208, and further reset the D-type flip-flops 210, 211 via 4-input NOR elements 229, 230, respectively. Assuming that the push button switch 12 or the relay contact output 201 from the wireless receiving device is turned on and the NOT element 214 outputs the signal A, which is the door opening/closing operation command.
Monostable multivibrator 20 at the rising edge of signal A
6 outputs a signal B with a pulse width T1. The signal B
are a 2-input OR element 223 and a 2-input AND element 22
It is converted into signal C via 4. Signal C is input as a clock to JK master-slave flip-flop 208, and during the high (HiGH) period of signal B before output signal E is inverted, two-input AND element 2
The output of 26 is input as the clock of flip-flop 210, which is set and outputs signal F. Using this as a door raising command, the relay coil 240 for raising the door is excited by the transistor 237, the relay contact 242 is turned on, and the motor 16 rotates normally. In this way, the motor is started, and at the same time, signal B is input as a trigger signal to the timer circuit 209 via the NOT element 221. The purpose of this is to turn on the lamp 38 that illuminates the inside of the garage for a certain period of time after receiving an operation command at the same time as the motor is started.
9 is excited to turn on the relay contact 244. In this way, the lamp 38 can be turned on for a certain period of time. Next, when the upper limit switch 30 is turned on while the ascending command is being output, the NOT elements 217 and 4
Flip-flop 2 via input NOT element 229
10 is input, transistor 37 is turned off, relay coil 240 is demagnetized, relay contact 242 is turned off, and motor 16 is stopped. Furthermore, when the operation command is turned on again while the ascending command is being output, that is, the push button switch 12 or the relay contact output 201 from the wireless receiving device is turned on, the signal B is output as described above.
The pulse is outputted from the monostable multiviprator 206 and outputted from the OR element 223. However, since flip-flop 210 is set, the output of 2-input AND element 228 is LOW, and the output of 2-input AND element 224 is prohibited. At this time, since the output of the NOT element 218 becomes high (HiGH), the 2-input AND element 227 converts the pulse of the signal B into the signal D.
Output as . This signal D is inputted as a reset signal to the flip-flop 210 via the 4-input NOR element 229. In this way, the motor 16 is stopped as before. Next, when another operation command is input in the same manner as above, since the JK master slave flip-flop 208 is set, the output of the 2-input AND element 226 is prohibited, and the signal is output from the 2-input AND element 225. B is output, flip-flop 211 is set, and signal G is output. As a result, the transistor 238 turns on and excites the relay coil 241 for lowering the door, the relay contact 243 turns on, the motor 16 reverses, and the door lowers. When the lower limit switch 31 is turned on during the lowering operation, a signal H is output from the NOT element 219, and the signal H is outputted by the integrating circuit 212 with a time delay T2 to the 4-input NOR element 230.
The signal is inputted as a reset signal to the flip-flop 211 via the flip-flop 211. As a result, the motor 16 is stopped in the same way as when the upper limit switch is turned on during upward movement. Next, the circuit operation when the obstruction detection switch 52 operates will be explained. During rising operation, that is, J-K master slave flip-flop 2
08 is set, flip-flop 210 is set, and flip-flop 211 is reset, obstruction detection switch 52 is activated.
When activated, the obstruction detection switch 52 turns off because it uses a B contact, and the 3
A high (HiGH) signal is output from the two-input NOR element 231 via the input NAND element 251, and triggers the monostable multivibrator 207. The Q output pulse of the multivibrator 207 is passed through the 4-input NOR element 229 to the flip-flop 2.
Reset 10. Also, at this time, the output of the 4-input AND element 232 is prohibited because the JK master-slave flip-flop 208 is set. Next, when the disruption detection switch 52 operates in the same manner as described above during the descending operation, that is, when the J-K master slave flip-flop 208 is reset, the flip-flop 210 is reset, and the flip-flop 211 is set, the interruption detection switch 52 is activated as described above. 3 inputs
Signal J is output from NAND element 251 and 2 inputs
A signal K with a pulse width T3 is output from the monostable multivibrator 207 via the NOR element 231.
The signal K causes the 4-input NOR element 230 to
Reset flip-flop 211. This causes the motor 16 to stop and the lowering movement of the door to stop. When the pulse signal K further falls, the output of the monostable multivibrator 207 rises, the 3-input AND element 232 becomes high (HiGH), and the signal L is output. The signal L is the differentiator circuit 2
13, it is converted into a signal M via the NOT element 222 and input to the two-input OR element 223. As a result, a series of control paths are followed as described above, and the signal F, which is a raising command, is output, and the door is raised, and the NOT element 21, which is the signal for the upper limit switch 30, is output.
The door is stopped by the output signal N of 7. In this way, when the door detects an obstacle, it immediately stops its operation while rising, and when it is descending, it immediately stops its downward movement, and resumes its upward movement after T3 hours, ensuring safe operation. However, if there is a small obstacle (stones, sticks, etc.) near the door's lower limit, or if the floor rises due to snow in winter, the lower limit point switch 31 is turned on to prevent the obstacle detection operation from operating inadvertently. The object detection operation is immediately inhibited by the two-input NAND element 231, but the signal G, which is a descending operation command, is processed by the signal I after a time delay T2 by the integrating circuit 212.
It will be reset. Further, when the obstruction detection switch 52 is inhibited from inputting while the door is stopped, and when the obstruction operates and stops while the door is rising as described above, the switch 52 is considered to be in the OFF state. Therefore, in order to smoothly start the door even under such conditions, the monostable multivibrator 250 is triggered by the output fall Y of the 2-input NAND, that is, the door activation signal, and the output is transferred to the 3-input NAND element 251. is set as one input, and the obstruction detection signal is ignored while the output is output. Naturally, ignoring the obstruction detection signal while the door is stopped is achieved by similarly inputting the output Y of the 2-input NAND element to the 3-input NAND element via the NOT element 220.

Next, the auxiliary control circuit 302 will be explained using FIG. 10. When the obstruction detection switch 52 is activated, the door is stopped except for a certain period of time when the motor 16 is activated as explained in FIG. Alternatively, it is abnormal for the motor to be driven while the obstruction detection switch 52 is still operating, although the rotation is reversed.

First, a monostable multivibrator 304 is provided which is set to a longer time than the time (monostable multivibrator 250) for ignoring the obstruction detection input when starting the motor as explained in FIG. The output P of 52 is connected to the B input terminal, and the output Y of the 2-input AND element 228 is connected to the A input terminal. That is, the monostable multivibrator 304 is triggered when the door is in operation and the obstruction detection switch 52 is operated. Because 2
The output Y of the input AND element 228 is low (LOW)
This is because the door is displayed when it is operating. This monostable multivibrator 304 is triggered by the A input low and the B input high, and by the time the output rises again, that is, by the elapse of the set time, the obstruction detection input is high and the two inputs are
If the output Y of the AND element 228 is low, it is determined that the main control circuit is malfunctioning. Therefore, the output of the 2-input AND element 228 is input to the 3-input AND element 306 via the NOT element 305, and the output of the monostable multivibrator 304 and the obstructor are input to the other input terminal of the 3-input AND element 306. connection detection input. In this way, if the output of the 3-input AND element 306 rises, it means that a malfunction of the main control circuit has been detected. The output of the three-input AND element 306 sets a D-type flip-flop 307 through an integrating circuit composed of a resistor R ₃₃ and a capacitor C ₃₁ . Additionally, the output of D-type flip-flop 307 drives transistor 308, i.e.
Drives relay 309. The relay contact 303 of the relay 309 is inserted into the motor drive circuit as shown in FIG. 6, and can forcibly stop the operation of the door.

This state continues until the power is turned off and then on again. This means that the reset condition for the D-type flip-flop 307 as a circuit is such that the output of the power supply reset circuit 205 shown in FIG.
This is because it is input (N) through 6.

According to one embodiment of the present invention, it is possible to easily check whether the main control circuit performs a predetermined process based on the input of the obstruction detection switch, and if the predetermined process is not performed, the driving state of the motor is cut off. By reducing the load, it is possible to create an extremely safe product.

Another embodiment of the present invention will be described using FIG. 11.

As explained in FIG. 10, after extracting the malfunction of the main control circuit using the 3-input AND element 306, the output is passed through the D-type flip-flop through an integrating circuit composed of a resistor R ₃₃ and a capacitor C ₃₁ . Lop 3
07,310 to be set. The output of the former D-type flip-flop 307 drives the transistor 308, that is, the relay 3
Drive 09. The relay contacts of this relay 309 have two contacts 315 and 316, and the relay contacts 242 and 2 are drive commands from the main control circuit.
43 is invalidated.

Furthermore, the latter D type flip-flop 31
The zero output drives transistor 311, ie, relay 312. This relay 31
The second relay contact 317 is inserted into the ascending motor drive system and is arranged so as to be effective only when the relay 309 is operating. That is, after the abnormal state is extracted by the output Y of the two-input AND element 228, it is forced to rise.

At the D input of the D type flip-flop 310,
If the S output of the D type flip-flop 211 shown in FIG. control can be achieved.

In order to restore these circuit states (states after the malfunction has been extracted) to their original state, it is sufficient to turn off the power and then turn it on again. D type flip-flop 307
is reset by the signal N obtained from the output of the power supply reset circuit 205 shown in FIG. 7 via NOT elements 215 and 216. Further, the D type flip-flop 310 is reset by inputting the signal N through the two-input AND element 314.

In addition, when the door is raised after detecting the above-mentioned malfunction, the input Q from the upper limit switch 30
Since the D-type flip-flop 310 is reset via the NOT element 313 and the two-input AND element 314, the door can be stopped at the upper limit position.

According to another embodiment of the present invention, if the main control circuit malfunctions, the door is controlled to release the condition if the door is lowered, which may lead to a more serious accident depending on the direction of movement. It can be made into a highly safe product.

As another modification of another embodiment of the present invention, the D-type flip-flop 310 shown in FIG. Even if the upper limit switch 30 fails, the safety of the product is further improved.
In this case, the setting condition for the monostable multivibrator is that the obstruction detection switch 52 is operating and in the downward movement, and this state continues for a certain period of time or more.

In the above embodiment, the door rise or fall signal is extracted from the logic signal of the main control circuit, but this may also be done by using the final stage relay contact, or the driving direction of the motor can be directly controlled by a relay or other means. Even if this is detected, there is no problem in implementing the present invention.

In the embodiments described above, the conditions for resetting the auxiliary control circuit after a failure has been detected are that the power is turned off and turned on again, but the implementation of the present invention will not be hindered even if a dedicated reset switch is provided.

In the above embodiments, if a circuit is added that, when a failure in the main control circuit is detected, uses the output to drive a notification means to inform a human of the condition and request immediate release, the effects of the present invention can be further enhanced. improves.
That is, it is necessary to clearly distinguish between normal and abnormal conditions when the door is stopped.

As mentioned above, the explanation has focused on the obstruction detection input and the processing of the main control circuit as an example, but according to the present invention, the same applies to various input signals such as upper limit switch, lower limit switch, door operation input, etc. It can be adapted to the following, and there is no problem in realizing it.

As described above, the present invention provides a door upper limit switch which is configured to control the door upper limit switch separately from the main control device which provides a predetermined command signal to the door opening/closing device in response to input signals from the door upper limit switch, the door lower limit switch and the obstruction detection switch. ,
The input signals from the door lower limit switch and the obstruction detection switch are logically determined by inputting the predetermined command signal output from the main control device, and the main control device responds to the input signals and outputs the predetermined command signal. The invention is characterized in that an auxiliary control circuit is provided that controls the opening/closing operation of the door opening/closing device independently from the main control device when the door opening/closing device is not outputted. If the door opening/closing device does not output a predetermined command signal, the door opening/closing device is controlled so that if the door opening/closing operation by the door opening/closing device is in the opening operation, it is stopped, and if the door opening/closing device is in the closing operation, it is opened. Therefore, if the main control device malfunctions, it can be accurately detected and the door can be operated safely, resulting in the effect of improving the safety and reliability of the device.

[Brief explanation of drawings]

Figure 1 is an overall installation diagram of the garage door opening/closing device.
Fig. 2 is a cross-sectional side view of the garage door opening/closing device main body, Fig. 3 is a top view, Figs. 4 and 5 are rail and trolley installation drawings, Fig. 6 is a block diagram of the present invention, Fig. 7, 8 and 9 are explanatory diagrams of the main control circuit, and FIGS. 10 and 11 are diagrams showing an embodiment of the present invention. 1...Body, 2...Rail, 3...Chain, 4
...Trolley, 6...Door, 13...Control device,
30...Upper limit switch, 31...Lower limit switch, 52...Obstruction detection switch, 300...State detection means, 301...
...Main control circuit, 302...Auxiliary control circuit, 304
...Monostable multivibrator, 305...
NOT element, 306... 3-input AND element, 307
...D type flip-flop, 308...transistor, 309...relay, 310...D type flip-flop, 312...relay.

Claims (1)

[Scope of Claims] 1. A door opening/closing device comprising a drive device for driving a door, a connecting means for connecting the drive device and the door, and input signals from a door upper limit switch, a door lower limit switch, and an obstruction detection switch. An automatic door opening/closing control device comprising a main control device for responsively giving a predetermined command signal to the door opening/closing device, which separately from the main control device includes a door upper limit switch, a door lower limit switch, and obstruction detection. A logical judgment is made by inputting the input signal from the switch and the predetermined command signal output from the main control device, and if the main control device does not output the predetermined command signal in response to the input signal, the door opens or closes. An automatic door opening/closing control device comprising an auxiliary control circuit that controls opening and closing operations of the device independently from the main control device. 2. In claim 1, if the main control circuit does not output a predetermined command signal, the auxiliary control device stops the door opening/closing operation by the door opening/closing device if it is in progress. An automatic door opening/closing control device, characterized in that the door opening/closing device is controlled to perform an opening operation if the door opening/closing device is in a closing operation.