JPH0338391B2 - - 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 that prevents secondary disasters when a state detection means fails.

The garage door opening/closing device is as shown in Figure 1.
A main body 1 incorporating a drive device, a rail 2 connected to the main body 1, a roller chain 3 guided by the rail 2 and operated by the driving force of the main body 1, and a roller chain 3 engaged with the roller chain. The main part of the trolley 4 is provided which moves horizontally along the rail. 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 6 is balanced by a door balance spring 8, and the garage door 6 is set in a state where it can be opened and closed by input. 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 moved along the door rail 7 in conjunction with the roller chain 3 that is operated by the driving force of the main body 1 and the trolley 4 that moves horizontally along the rail 2 by the operation of the roller chain. It is opened and closed. 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 roller chain 3 and the trolley 4 can be disconnected by the release string 14.
The garage door 6 can be opened and closed independently by human power.

First, the structure of the main body of the garage door opening/closing device will be explained with reference to FIG. FIG. 2 is a longitudinal side 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) 2 from both sides within the main body frame 1.
3. 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; Detect quickly,
Must stop. The obstacle detection mechanism described above will be explained below. Above, chain guide (A) 22, chain guide (B) 23, and chain guide (C)
A part of the chain guide groove formed by 24 is formed into a curved path, and the roller chain 3 is moved by the force generated by the compressive force applied to the roller chain 3 when the door is lowered, and the tensile force applied when the door is raised. An obstruction detection fitting 34 is provided. The compression force of the obstruction spring 35 that restricts the movement of the obstruction detection fitting 34 can be changed by turning the obstruction operating force adjusting screw 36 and moving the spring presser plate 37. In addition, the obstruction detection metal fitting 34
The obstruction detection switch 52, which is turned on and off depending on the movement of the door, detects the above-mentioned obstacle and causes the door to rise when the door is lowered and to stop when the door is raised.

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 3 and 4.
This will be explained using figures. The cross-sectional structure of the rail 2 is formed from a thin steel plate or a plastic plate, and the trolley 4 is slidably guided on the outer periphery of the rail. Further, the rails 2 sandwich the roller portion of the roller chain 3 from both sides and guide the roller chain 3 to reciprocate linearly. 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 in a groove of a roller chain attachment 3-a 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 be slid up and down, and is normally pushed upward by the force of a spring or the like, so that the connecting fitting 4-a is connected to the trolley 4 and the roller chain. 3
is 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 connect the roller chain attachment 3-a. Do this by leaving a. Next, the door arm 10 for transmitting the operation of the trolley 4 to the door includes an L-shaped door arm 10-a and a straight door arm 10-a.
b, each of which can be connected by freely changing its length depending on the positional relationship between the door and the rail. One end of the door arm 10 is connected to the trolley 4, and 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 and inserting a pin 4-c into the long groove 4-b. The pin 4-c
is normally pressed into the state shown in FIG. 3 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 reversing due to obstruction detection when the door is lowered, even if the door is piled up by ice or the like, or if there is a small item such as a water hose. That is, 2 inches (approx. 5 cm) above the floor.
In the following, it is desirable that the robot not turn around and stop even if an obstacle is detected. 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 a circuit for controlling a garage door as described above.

The circuit is required to accurately process inputs from an upper limit switch, a lower limit switch, and an obstruction detection switch, which are door state detection means, and to control the drive device. When these processing systems become uncontrollable, there are the following situations.

(1) When the upper and lower limit switches are malfunctioning. (2) When the obstruction detection switch is malfunctioning. (3) When the control circuit that outputs commands to the drive device is malfunctioning. Since there is a movement limit, even if it breaks down, the obstruction detection switch should work, so there is no problem. However, if the obstruction detection switch becomes malfunctioning at the same time as the upper and lower limit switches, control becomes impossible.

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. but,
In this method, there is a possibility that the belt may be worn out 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 1
It continues until the thermal protector No. 6 is activated, which is not desirable. 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.

Furthermore, since this state accepts operation input, it is used to include factors that may lead to a serious accident. For example, if the switch system is malfunctioning during descent, the lower surface of the door will be pressed against the ground, etc. However, when a new operation input is input, the motor 16 stops and returns to a state where there is no problem in operation. If this state is maintained, the lower surface of the door will continue to press the ground etc. until the next operation input is accepted and the operation input is input again. If the device is used with factors that can lead to serious accidents, the danger is further increased, especially for children who are vulnerable to door operating forces.

In order to solve this problem, Japanese Patent Application Laid-Open No. 56-139378
The door opening/closing control device disclosed in the publication includes a door opening/closing device having a drive device, a connecting means for connecting the drive device and the door, and a control device for applying a predetermined drive control signal to the door opening/closing device. and a monostable circuit that waveforms and outputs an operation command input signal input from an operation command generation device (push button switch) to the control device, and a door opens every time an output signal is generated from the monostable circuit. a main control circuit that has a logic circuit that generates the drive control signal that controls the drive device to operate, stop, close, and stop; a timer that monitors the duration of the door opening and closing operations; A door opening/closing control device comprising an auxiliary control circuit having a stop holding circuit that stops the driving device when the duration time exceeds a predetermined value and maintains the stopped state until a release signal is input, The release signal is generated by turning on the power again or pressing a reset button.

However, this conventional door opening/closing control device
When the push button switch is pressed during the stop holding period and an operation command input signal is given, the main control circuit advances the control state in the order of open operation, stop, close operation, and stop every time the operation command input signal is given. Therefore, it is difficult to predict what kind of door control state will be restored when the reset button is pressed to release the auxiliary control circuit. Even if the state is restored to the stopped state, it is not known whether the next operation command input signal will cause the opening or closing operation.

Therefore, it is dangerous to press the reset button carelessly to release the stopped state or press the push button switch to issue a new operation command.

An object of the present invention is to provide an even safer door opening/closing control device that compensates for the lack of consideration given to safety in conventional door opening/closing control devices.

In order to achieve this object, the present invention provides a door opening/closing device including a driving device, a connecting means for connecting the driving device and the door, and a control device for applying a predetermined drive control signal to the door opening/closing device. The control device includes a monostable circuit that waveforms and outputs the operation command input signal input from the operation command generation device, and a door that opens, stops, and opens every time an output signal is generated from the monostable circuit. a main control circuit having a logic circuit that generates the drive control signal that controls the drive device to close and stop the door; a timer that monitors the duration of the door opening and closing operations; and a timer that monitors the duration of the door opening and closing operations; A door opening/closing control device comprising: an auxiliary control circuit having a stop holding circuit that stops the driving device when a value exceeds a value and holds the stopped state until a release signal is input; a release switch that generates a release signal for canceling state retention, and controlling the monostable circuit based on an output signal of the stop and hold circuit, while the stop and hold circuit holds the drive device in the stopped state. The present invention is characterized in that an input prohibition circuit is provided for preventing the monostable circuit from shaping the operation command input signal and outputting it.

Examples will be described below.

FIG. 5 shows a block diagram of the configuration 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, and a motor 1 that drives a garage door based on the detection input.
6, and an auxiliary control circuit 302 that issues a command to drive the garage door or monitors the driving state.

The auxiliary control circuit 302 has a time management means activated by the on-timing of the drive command for the motor 16 output from the main control circuit 301,
If the motor does not stop within the set time (if the door does not stop), set the relay 303 to the "open" state,
The power supply to the motor 16 is stopped. Furthermore, subsequent input signals are cut. This state continues until the release switch 100 is pressed. Furthermore, after the release switch 100 is pressed, the door is controlled to always rise according to the received operation input.

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

In FIG. 6, 12 is a push button switch for commanding door opening/closing operations, 201 is a relay contact output for commanding door opening/closing operations also from the radio receiving device, 30 is a door upper limit switch, 31 is a door lower limit switch, and 52 is an obstacle detection limit switch. ,
205 is a power reset circuit that creates a reset signal when the power is turned on; 100 is a release switch for initializing the circuit; 206, 207, and 250 are monostable multivibrators; 208 is a J-K master slave flip-flop; 209 is a timer circuit using NE555 (manufactured by Signtech), etc., 21
0,211 is a D type flip-flop, 212
is an integration circuit, 213 is a differentiation circuit, 214 to 222
is NOT element, 223 is 2-input OR element, 224~
228 is a 2-input AND element, 229 and 230 are 4
Input NOR element, 231 is 2-input NOR element, 23
2 is a 3-input AND element, 351 is a 3-input AND element, 233 is a transformer for control power supply, 234 is a diode stack, 235 is an IC regulator for control power supply, 236 to 238 are relay drive transistors, and 239 to 241 are relay coils. , 242~
244 is the relay contact, 16 is a door opening/closing drive motor, and 38 is a lamp.

The circuit operation will be explained below with reference to time charts shown in FIGS. 7 and 8. When the power is turned on to this circuit, the transformer 233, the diode stack 234, and the IC regulator 235
A control power supply VDD is supplied via. Then,
The power supply reset circuit 205 integrates the rise of VDD and outputs a reset pulse through the NOT element 215. The reset pulse is applied to the NOT element 21.
6, the JK master slave flip-flop 208 is reset, and the D-type flip-flops 210, 211 are reset via the 4-input NOR elements 229, 230, respectively. In the configuration of the power supply reset circuit 205, a release switch 100 is connected to the connection point of the resistors R3 and R4. The purpose of the release switch 100 is to initialize the circuit, and when the release switch is turned on,
The input of NOT element 215 becomes low level,
achieved. Push button switch 12 which is a door opening/closing operation command or relay contact output 2 from a wireless receiving device
01 is turned on, and the signal A is turned on by the NOT element 214.
When the signal A rises, the monostable multivibrator 206 outputs the signal B with a pulse width T1. However, the signal B is output when the signal M of the monostable multivibrator 206 is at a high level, and is not output when the signal M is at a low level. The signal M will be described later, but
This signal is output from the auxiliary control circuit 302 and does not accept operation input signals. The signal B is
A signal C is outputted via a 2-input OR element 223 and a 2-input AND element 224. Signal C is input as a clock to JK master slave flip-flop 208, and during the high (HiGH) period of signal C before output signal E is inverted, two-input AND element 226 is input.
The output of the flip-flop 210 is input as the clock of the flip-flop 210, and the flip-flop 210 is set and the signal F is output. 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, but at the same time signal B is sent to the timer circuit 2 through the NOT element 221.
09 as a trigger signal. this is,
The purpose 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.
is energized, and the relay contact 244 is turned on. In this way, the lamp 38 can be lit 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 NOR element 229
10 reset is input, transistor 237
is turned off, the relay coil 240 is demagnetized, the relay contact 242 is turned off, and the 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 signal is output from the pulse monostable multivibrator 206 and output from the OR element 223. but,
Since the flip-flop 210 is set, the output of the 2-input AND element 228 is low (LOW), and the output of the 2-input AND element 224 is low.
output is prohibited. At this time, 2 input AND
Since the output of NOT element 218 becomes high (HiGH), element 227 converts the pulse of signal B into signal D.
Output as . This signal D is input 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.
Output. As a result, the transistor 238 turns on, energizing the relay coil 241 for lowering the door, and the relay contact 243 turns on, causing the motor 1
6 is reversed and the door moves downward. When the lower limit switch 31 is turned on during the lowering operation,
A signal H is output from the NOT element 219, and a time delay T2 is provided by the integrating circuit 212, and 4 inputs are made.
Flip-flop 21 via NOR element 230
It is input as a 1 reset signal. As a result, the motor stops in the same way as when the upper limit is turned on during ascending. Next, the circuit operation when the obstacle detection limit switch 52 is activated will be explained. During the rising operation,
That is, the J-K master slave flip-flop 208 is set, and the flip-flop 210 is set.
is set and the flip-flop 211 is reset, when the obstacle detection limit switch 52 operates, the limit switch 52 turns off because it uses a B contact, and the high voltage is output from the two-input NOR element 231 via the three-input NAND element 251. (HiGH) signal is output and triggers monostable multivibrator 207. The Q output pulse of the multivibrator 207 is transmitted to the 4-input NOR element 2.
29 to reset the flip-flop 210. Also, at this time, the 3-input AND element 232
Since the -K master-slave flip-flop 208 is set, the output of the AND element is prohibited. Then during the descending motion, i.e. J-K
When the master-slave flip-flop 208 is reset, the flip-flop 210 is reset, and the flip-flop 211 is set, when the obstacle detection limit 52 operates in the same manner as described above, the signal J is output from the 3-input NAND element 251 as described above. A signal K with a pulse width T3 is output from the monostable multivibrator 207 via the input NOR element 231.
is output. The flip-flop 211 is reset by the signal K via the 4-input NOR element 230. This stops the motor and also stops the lowering movement of the door. 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 via the differentiator circuit 213 and the NOT element 222,
The signal M is converted into a signal M and input to a 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 door is stopped by the output signal N of the NOT element 217, which is the signal of the upper limit switch 30. In this way, when the door detects an obstacle, the door immediately stops its operation while rising, stops its lowering operation immediately when it is descending, and starts its rising operation 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 switch 31 is turned on to prevent the obstacle detection operation from operating inadvertently. Object detection operation uses 2 input NOR elements 2
31, but the signal G which is the descending operation command is delayed by the time delay T2 by the integrating circuit 212.
It is reset by the subsequent signal I. Furthermore, input to the obstruction switch 52 is prohibited while the door is stopped, and when the obstruction operates and stops while the door is rising as described above, the switch 52 is disabled.
is considered to be in the off state. Therefore, in order to start the door smoothly even under such conditions,
The monostable multivibrator 250 is triggered by the falling Y of the output of the 2-input AND, that is, the door activation signal, and the output is set to the 3-input NAND element 251. Ignore the detection signal. Also, of course, ignoring the obstruction detection signal when the door is stopped,
Similarly, the output Y of the 2-input AND element is
This is achieved by inputting to the NAND element via the NOT element 220.

Next, the auxiliary control circuit 302 will be explained. An embodiment of the auxiliary control circuit according to the present invention will be described with reference to FIG. The output Y of the two-input AND element 228 is
Displays whether the door is operating or stopped. That is, it is sufficient to focus on the output Y of the two-input AND element and constantly check whether the output Y continues for a certain period of time.

First, a monostable multivibrator 304 set to a time longer than the door movement time is provided, and the
This is activated by the fall of the output Y of the input AND element 228, that is, the door activation signal. Two inputs must be input before the output of this monostable multivibrator 304 rises again, that is, before the set time elapses.
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 2-input AND element 306 via the NOT element 305, and the Q of the monostable multivibrator 304 is input to the other input terminal of the 2-input AND element 306.
Enter the output. In this way, the 2-input AND element 3
If the output of 06 rises,
That is, the malfunction of the main control circuit has been extracted. The two-input AND element 30
The output of 6 is passed through an integrating circuit consisting of a resistor R ₃₃ and a capacitor C ₃₁ to a D type flip-flop 3.
Set 07. Additionally, the output of D-type flip-flop 307 drives transistor 308, which in turn drives relay 309. As shown in FIG. 5, the relay contact 303 of the relay 309 is inserted into the motor drive circuit and can forcibly stop the operation of the door.

Further, the output (signal M) of the D-type flip-flop 307 becomes LOW. The signal M is a monostable multivibrator 2 shown in FIG.
Since it is connected to the A input terminal of 06, subsequent operation input signals will not be accepted. This is because the monostable multivibrator 206 converts the operation input into pulses, and as a condition, A
Processing is performed when the input terminal is high (HiGH) and the B input terminal is high (HiGH). As mentioned above, when the B input terminal is high (HiGH), NOT
When the input of element 214 is low (LOW),
That is, this is nothing but a case where an operation input is input, such as when the push button switch 12 is turned on. Therefore, as described above, if the signal M is LOW, the monostable multivibrator 206 does not operate and no operational input is accepted.

In this state, the D type flip-flop 30
Continues until 7 is reset. The reset condition shown here is that the signal P in the figure is low (LOW).
It's fine if it becomes. The signal P connects the output of the power supply reset circuit 205 shown in FIG.
16. In other words, when the power is turned on and when the release switch 100 is pressed,
The signal P becomes low, and the entire circuit can be initialized.

Furthermore, by being initialized, the door is controlled to rise when the next operation input is received, regardless of the direction in which the door moves when the D-type flip-flop 307 is set. The content of this control is clear from the fact that the D type flip-flop 210 is set as described above.

According to one embodiment of the present invention, the state detection means;
If the main control circuit fails, the load will be reduced by cutting off the motor drive state after a certain period of time. By prohibiting this, the door will no longer be opened and closed repeatedly, making the product extremely safe.

Another embodiment of the present invention will be described using FIG. 10.

A circuit is provided to check whether the output Y of the two-input AND element 228 shown in FIG. 5 continues for a certain period of time. First, a monostable multivibrator 304 is provided, which is set to a time longer than the door movement time, and is activated by the fall of the output Y of the two-input AND element 228, that is, by the door activation signal. moreover,
The output of the two-input AND element 228 is connected to the NOT element 3.
05 to the two-input AND element 306.
If the output of the monostable multivibrator 304 is inputted to the other input terminal of the 2-input AND element 306, when the output of the 2-input AND element becomes high, malfunction of the main control circuit can be detected. It has been extracted. Said 2-input AND element 3
The output of 06 is passed through an integrating circuit consisting of a resistor R ₃₃ and a capacitor C ₃₁ to set a D type flip-flop 307. At the same time, the D type flip-flop 310 is also set. The output of the former D-type flip-flop 307 drives a transistor 308, that is, a relay 309. The relay contact of this relay 309 has two contacts 315 and 316, and the relay contact 24, which is a drive command from the main control circuit, controls the motor drive circuit.
2,243 is invalidated.

Further, the output of the D-type flip-flop 307 becomes low (LOW), and the output (signal M) becomes
It is connected to the monostable multivibrator A input terminal shown in FIG. 6, and prohibits further operation input.

Furthermore, the latter D type flip-flop 31
An output of 0 drives transistor 311, that is, drives relay 312. This relay 3
Twelve relay contacts 317 are inserted into the ascending motor drive system and are arranged to be effective only when 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.

The S input of the D type flip-flop 211 shown in FIG. 7 is connected to the D input of the D type flip-flop 310.
By inputting the output, the door can be raised when it is lowering and stopped when it is raised, depending on the processing contents, and extremely efficient control can be achieved.

The reset condition for this circuit is that the D-type flip-flop 307 is brought to its initial state by turning off and turning on the power, or by pressing the release switch 100.
The output of 05 is input (P) via NOT elements 215 and 216. D type flip-flop 310
is reset by the P input and the input (Q) of the upper limit switch 30, so the NOT element 313 and 2
Input via input AND element 314.

By doing this, it is forced to rise,
It can be stopped using the upper limit switch.

According to another embodiment of the present invention, if the main control circuit malfunctions, depending on the direction of movement of the door, control is performed to release the condition if the door is lowered, which may lead to a more serious accident; In addition, special processing is performed on operation inputs (power cycle, press release switch)
This prevents the door from opening and closing any more times, making the product extremely safe.

Another modification of another embodiment of the present invention will be explained using FIG. 11.

As is clear from the figure, as shown in Figure 10,
The D-type flip-flop 310 is replaced with a monostable multivibrator 350.

The time setting of the monostable multivibrator 350 is set to be sufficiently shorter than the opening/closing time. for example,
If it takes about 2 seconds, the door will move about 60cm. That is, when the abnormal state is detected and the door is lowered, it is sufficient to release the pressing force, and the door operation is to be interrupted as soon as possible to prevent the degree of failure from progressing. With this procedure, even if the door rises after the abnormality is detected, or even if the condition detection means (upper limit switch 30) is out of order, the door operation can be interrupted in a shorter time, further improving the safety of the product. do.

Although it is clear from the figure, the operating conditions for the monostable multivibrator 350 include two inputs.
The output of the AND element 306 rises (the signal is input to the A input terminal of the monostable multivibrator 350), and the S output is high (HiGH) (via the NOT element 318). The signal is input to the B input terminal. This indicates that the door is lowering.)
must be established.

In other words, the operation is such that the abnormal state is extracted (the output of the 2-input AND element is high (HiGH)).
When the door is going down, it will reverse to going up, and when the door is going up, it will stop.

Another embodiment of the present invention will be described using FIG. 12.

D-type flip-flop 210, 2 in FIG.
11 outputs, that is, the door up command R and the door down command S, are sent to the monostable multivibrator 319,
320. The setting time of this monostable multivibrator is made longer than the door movement time. By doing so, when the R or S command reaches the set time, the relay 240 or 24
1 is turned off and the motor can be stopped, forming an extremely efficient circuit. Furthermore, in this state, both input terminals of the 2-input NAND element 321 become high (HiGH) when rising.
The output of the 2-input NAND element 321 becomes low (LOW) and is input to one end of the 2-input NAND element 323 via the integrating circuits R ₅₃ and C ₅₃ . As a result, the output of the two-input NAND element 323 becomes high (HiGH), setting the D-type flip-flop 324. The output (signal M) of the D type flip-flop becomes LOW,
As mentioned above, no new operation inputs will be accepted. This state continues until the signal P goes low.

Similarly, when descending, 2-input NAND element 3
22, 2-input NAND element 323
A D-type flip-flop 324 is set via.

According to another embodiment of the present invention, it is only necessary to add a timer system to the conventional circuit, and even if the state detection means main control circuit fails, the product can be led to a safer side, and the effect is big.

Another embodiment of the present invention will be described using FIG. 13.

As explained in FIG. 12, when the operation command is output for a period longer than the set time, the motor is stopped by the monostable multivibrators 319 and 320. Further, the D-type flip-flop 324 is set, and the output (signal M) is set to LOW.
, and new operation input is prohibited. However,
The Q output of the D-type flip-flop 324 is high (HiGH), and this output is input to the trigger terminal of the D-type flip-flop 327. A door lowering command S is input as the D input of the D type flip-flop 327. That is, the D type flip-flop 327 is set when the door is detected to be lowering. The Q output of the D-type flip-flop 327 becomes high (HiGH) and is input to one end of the two-input OR element 328, causing the door to rise. The rising operation continues until the signal P goes low (LOW) or the signal Q goes high (HiGH), which indicates that the upper limit switch 30 is turned on.
This continues via the NOT element 325 and the two-input NAND element 326 until the D-type flip-flop 327 is reset.

As can be seen, if the D-type flip-flop 324 is set while the door is rising,
The lowering command S is low, the D type flip-flop 327 is not set, and the door only stops.

According to another embodiment of the present invention, the pressing force is further released compared to the embodiment shown in FIG. 12, so that the product can be brought to a safer side.

As a modification of another embodiment of the present invention, a monostable multivibrator is inserted in place of the D-type flip-flop 327, and the set time is
Make it as short as about 2 seconds. The measure consists in raising the door for a sufficient period of time to release the pressing force and interrupting the door operation as soon as possible to prevent the degree of failure from progressing.

Another embodiment of the present invention will be explained using FIG. 14. This embodiment differs from the previous embodiments in that only the obstruction detection switch 52 fails and all other circuits are normal.

The contents of the figure are mentioned in FIG. 12 and will be omitted. As a result of detecting an abnormal condition, the D type flip-flop 324 is set. The Q output of the D-type flip-flop 324 becomes high (HiGH). One end of the obstruction detection switch 52 is input to the Q output of the D-type flip-flop 324. That is, when the Q output is LOW, the detection operation is enabled by turning on/off the obstruction detection switch 52. When the obstruction detection switch 52 is off, there are 3 inputs (it turns off when detection occurs because it uses a B contact).
- input terminal of NAND element 251 is high (HiGH)
becomes. As a result, the aforementioned obstruction detection process is performed. Therefore, when the Q output of the D-type flip-flop 324 becomes high (HiGH), it means that an obstacle has been detected in a pseudo manner regardless of whether the obstruction detection switch 52 is on or off. Therefore, if the door is rising, it is stopped, and if it is falling, it is raised.

According to this embodiment, although it is limited to the case where the obstruction detection switch 52 fails, it is possible to lead the product to a safer side, and the effect is great.

Another embodiment of the present invention will be explained using FIG. 15. This embodiment shows an example in which only the obstruction detection switch 52 fails and all other circuits are normal.

The contents of the figure are mentioned in FIG. 9 and will be omitted. As a result of detecting an abnormal condition, the D type flop 307 is set. The Q output of the D-type flip-flop 307 becomes high (HiGH). One end of the disruption detection switch 52 is input to the Q output of the D-type flip-flop 307.
That is, when the Q output is LOW, the detection operation is enabled by turning on/off the obstruction detection switch. When the obstruction detection switch 52 is off (it uses a B contact, it is off when detected), the 3-input NAND
One input terminal of the element 251 becomes high (HiGH). As a result, the aforementioned obstruction detection process is performed.

Therefore, the D type flip-flop 30
When the Q output of No. 7 becomes high (HiGH), it means that an obstacle has been detected in a pseudo manner, regardless of whether the obstruction detection switch 52 is on or off. Therefore, if the door is rising, stop,
If it is descending, the procedure of ascending is performed.

According to this embodiment, although it is limited to the case where the obstruction detection switch 52 fails, it is possible to lead the product to a safer side, and the effect is great.

As described above, in the embodiment, when a failure of the state detection means or the main control circuit is detected, a circuit is added that drives the notification means with the output, informs the human of the state, and requests that it be canceled immediately. For example, if a buzzer is inserted at both ends of the relay 309 in FIG. 9), the effects of the present invention will be further improved. That is, if the door is stopped, no operation input is accepted and it is necessary to clarify whether it is normal or abnormal.

In the above embodiments, from the logic signals of the main control circuit,
Although we have extracted the door rise or fall signal, this can also be done using the output of the final stage relay contact.
Further, there is no problem with the present invention even if the driving direction of the motor is directly detected by a relay or other means.

As described above, according to the present invention, the main control circuit is provided with an operation command input signal that is waveform-shaped and applied to the logic circuit, and the logic circuit drives the door to open, stop, close, and stop. A monostable circuit that generates a drive control signal that controls the device stops the drive device when the duration of door opening and closing operations exceeds a predetermined value, and maintains the stopped state until a release signal is input. An input operation is performed so that the monostable circuit does not waveform-shape and output the operation command input signal while the stop holding circuit holds the drive device in a stopped state based on the output signal of the stop holding circuit to hold. This prevents the control state in the main control circuit from progressing, and when the release switch releases the hold state of the stop hold circuit, the recovery state becomes clear, which has the effect of improving safety at the time of release. It will be done.

[Brief explanation of drawings]

Figure 1 is an overall installation diagram of the garage door opening/closing device.
Figure 2 is a cross-sectional side view of the garage door opening/closing device body, Figures 3 and 4 are rail and trolley installation diagrams, Figure 5 is a block diagram of the present invention, Figures 6, 7, and 8 are Explanatory diagrams of the main control circuit, FIGS. 9 to 15 are explanatory diagrams of embodiments 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, 100... Release switch, 300...
...State detection means, 301...Main control circuit, 302
... Auxiliary control circuit, 304 ... Monostable multivibrator, 306 ... 2-input AND element, 307
...D type flip-flop.

Claims (1)

[Scope of Claims] 1. A door opening/closing device including a driving device and a connecting means for connecting the driving device and the door, and a control device for applying a predetermined drive control signal to the door opening/closing device, A monostable circuit that waveforms and outputs an operation command input signal input from an operation command generation device to the device, and a door opens, stops, closes, and stops every time an output signal is generated from the monostable circuit. a main control circuit having a logic circuit that generates the drive control signal to control the drive device; a timer for monitoring the duration of the door opening and closing operations; and an auxiliary control circuit having a stop holding circuit that stops the driving device and holds the stopped state until a release signal is input, the door opening/closing control device including: a release switch that generates a release signal; and a release switch that controls the monostable circuit based on an output signal of the stop and hold circuit, and the monostable circuit is configured to operate while the stop and hold circuit holds the drive device in the stopped state. A door opening/closing control device comprising: an input prohibition circuit that shapes the waveform of the operation command input signal and prevents it from being output.