JP2003049592A - Obstacle detecting structure for motor-driven opening/ closing body for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erroneous detection of obstacles to a motor-driven opening/closing body for building by performing obstacle detection in a high- sensitivity detection mode from the fully opened state to an arbitrary opened state of the opening/closing body. SOLUTION: An electronic switch TS is connected in parallel with the second resistor R2 of an obstacle avoiding circuit 13 and the circuit 13 is set so that the mode of the circuit 13 may become the high-sensitivity detection mode when the switch TS is turned on and a normal-sensitivity detection mode when the switch TS is turned off. A controller 8 is provided with a mode switching means 16 which switches the switch TS from the turned-off state to the turned-on state when a fully-opened state detecting signal is inputted from a fully-opened state detecting circuit 14 and from the turned-on state to the turned-off state when a first timer 17 is reset.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of an obstacle detection structure for an electrically-operated building opening / closing body which is provided to be opened and closed such as an opening of a building.

[0002]

2. Description of the Related Art Generally, in such an electric opening / closing body for construction, in the case of a building shutter device, for example, a shutter curtain is configured to be opened / closed by a drive of an opening / closing device controlled by a control device. There is something I did. In such a case, when there is an obstacle in the opening, the shutter curtain that operates to close will pinch the obstacle, so that an obstacle detection signal is output when the shutter curtain that operates to close hits an obstacle. On the other hand, the control device receives an input of the output obstacle detection signal and controls the stoppage of the opening / closing device, and then opens the drive for a predetermined period of time (emergency stop and reverse rising operation) An obstacle detecting means for outputting an avoidance command is provided. When the switch is composed of an asynchronous single-phase motor, the terminal voltage of the phase-shifting capacitor provided in the switch changes because the shutter curtain abuts against the obstacle. It has been proposed that when there is a change above a preset value, this is regarded as obstacle detection and an obstacle detection signal is output to a switch.

[0003]

By the way, in such an obstacle detecting means, most of the shutter curtain is taken up by the take-up shaft when the shutter curtain starts the closing operation from the fully opened state. The amount of shutter curtains hanging down the opening is small. Therefore, if the shutter curtain comes into contact with an obstacle and the unwinding amount of the shutter curtain changes,
The change may be absorbed by rewinding the shutter curtain wound on the winding shaft (in a state where the shutter curtain is loosened), and the change may occur with respect to the switchgear interlocking with the winding shaft. There is a tendency that the load acting as a result becomes small. In this case, in the case where the obstacle detection is performed by the voltage change of the switch as described above, the voltage change of the switch is too small to be detected, and the obstacle detection signal is not output and the obstacle is detected. The object avoidance command may not be output. In such a case, even if the shutter curtain comes into contact with the provisional obstacle, the shutter curtain is not emergency stopped, and it is assumed that the closing operation is continued and the obstacle is caught. There is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and was created for the purpose of solving these problems, and provides a control device for a switchgear which opens and closes an opening / closing body. When providing obstacle detection means for outputting an obstacle detection signal based on a voltage change of the switch accompanying the obstacle detection in the process of closing the opening / closing body, the obstacle detection means is set to a preset small voltage. The control device is configured to be switchable between a high-sensitivity detection mode that outputs an obstacle detection signal based on a change detection and a normal detection mode that outputs an obstacle detection signal based on a larger voltage change. , Full-open detection means that outputs a full-open detection signal when the open / close body is fully opened, and an open state that detects that the open / close body has changed from the fully open state to an arbitrary open state and outputs an open state detection signal A knowledge unit, the obstacle detection means,
Switch to high sensitivity detection mode with full open detection signal input,
A mode switching means for outputting a switching command for switching from the high sensitivity detection mode to the normal detection mode in response to the input of the open state detection signal is provided. By doing so, obstacle detection can be performed in the high-sensitivity detection mode from the fully open position of the opening / closing body to an arbitrary open state, and in the normal detection mode after that, and the obstacle detection means malfunctions. Can be prevented. In this switch, an asynchronous single-phase motor is used in the switch of the present invention, and the obstacle detecting means includes a similar voltage circuit connected to the terminal voltage of a phase shift capacitor provided in the asynchronous single-phase motor, and a reference voltage circuit. , A comparator circuit that compares the voltages from these voltage circuits, and outputs an obstacle detection signal when the voltage from the similar voltage circuit falls below the voltage from the reference voltage circuit,
The obstacle detection means may be configured to switch between the high-sensitivity detection mode and the normal detection mode based on switching the resistance value forming the similar voltage circuit. Further, in this, the mode switching means of the present invention may be composed of a changeover switch connected in parallel to the resistance of the similar voltage circuit.
Further, in this, the full-open detection means of the present invention includes a first circuit connected in parallel to a full-open detection switch connected in series to the opening wiring of the asynchronous single-phase motor, and a photocoupler for the first circuit. It may be configured to include a second circuit connected via a resistor and a capacitor. Still further, in this, the open state detection means of the present invention is started when the opening / closing body starts the closing operation from the fully open state, and a timer that outputs an open state detection signal after a preset timer time has elapsed. It may be configured by means. Further, in this, the timer means of the present invention is reset by the drive stop command being output during the preset timer time, and the obstacle detection means is switched from the high sensitivity detection mode to the normal detection mode. Can be configured to.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
~ It demonstrates based on the drawing of FIG. In the drawings, reference numeral 1 denotes a shutter curtain of a shutter device that opens and closes an opening, and the shutter curtain 1 is wound around a winding drum 3 installed in a shutter case 2 provided above the body. The winding drum 3 has a switch 5 equipped with an asynchronous single-phase type electric motor 4 and is connected to the switch 5 in an interlocking manner. With the forward / reverse drive (open / close drive) of the switch 5, the winding drum 3 is wound. 3 rotates in the forward and reverse directions, whereby the shutter curtain 1 is unwound from the winding drum 3 and wound up to open and close between the fully closed posture in which the opening is closed and the fully opened posture in which the opening is opened. Although configured to operate, all of these configurations are conventional. Reference numeral 6 denotes guide rails provided upright on the left and right sides of the opening, and the shutter curtain 1 is set to open and close the opening while being guided by the guide rails 6 on the left and right sides. .

Reference numeral 7 denotes an operation tool provided on the side of the opening. The operation tool 7 is provided with an opening operation switch PBU, a stop operation switch PBS, and a closing operation switch PBD. These operation switches PBU, PBS,
Each wiring of the PBD is arranged above the frame and is input (connected) to a control device (control panel) 8 for driving and controlling the switch 5. And each operation switch PBU, PBS, P
The control device 8 outputs an opening drive command, a drive stop command, and a closing drive command to the switch 5 based on the output of operation signals (open signal, stop signal, close signal) in response to the push operation of the BD. Accordingly, the opening / closing device 5 performs corresponding opening drive, stopping drive, and closing drive to perform shutter shutter 1
Is set to open and close. Incidentally, although the control device 8 of the present embodiment is configured by a logic circuit as described later, it is needless to say that it may be configured to perform computer control using a CPU.

The electric motor 4 constituting the switch 5 is
It is driven by a household AC power supply PS, and is driven in forward / reverse rotation based on power supply from the power supply,
For example, forward winding for closing drive (closing winding)
4a, a reverse winding (opening winding) 4b for opening drive, and a rotation that is connected in series to the closing winding 4a and the opening winding 4b and determines the rotation direction of the electric motor 4. And a phase shift capacitor 9 for generating a magnetic field. Further, the wiring of the closing winding 4a is turned off when the shutter curtain 1 is in the fully closed posture.
A full-closed detection switch 10 that operates to stop the drive of the switch 5 (electric motor 4) is connected, while the opening winding 4b
A full-open detection switch 11 that is turned off to stop the drive of the opening / closing device 5 when the shutter curtain 1 is in the fully open posture is connected to each of the wirings. Here, each of the switches 10 and 11 is configured to detect whether the shutter curtain 1 is fully closed or fully opened based on the rotation speed of the electric motor 4, and when the predetermined rotation speed is reached, the corresponding switch 10 or 11 is switched. The detection switches 10 and 11 are set to switch from the ON state to the OFF state when the shutter curtain 1 is in the fully closed or fully opened posture.

The controller 8 corresponds to an opening / closing device drive circuit 12 for outputting a corresponding command to the opening / closing device 5 based on an operation signal from the operating tool 7, and an obstacle detecting means of the present invention. The obstacle detection circuit 13, the full-open detection circuit 14 corresponding to the full-open detection means of the present invention, and the full-closed detection circuit 15 are connected by wiring. Then, the switch drive circuit 12 turns on the corresponding relay switch for opening or closing based on the push operation of each operation switch PBU, PBS, PBD, thereby opening for connection to the relay switch, The circuit is configured to appropriately close each circuit for closing, and is configured to include a holding circuit 12a for holding the ON operation of the relay switch. Reference numeral 12b is a power supply circuit connected to the power supply PS. The power supply circuit 12b is a relay for opening or closing when the voltage is unstable when power supply is started during installation or maintenance of the shutter device. The relays are configured to be regulated so as to prevent malfunction and protection of each relay.

On the other hand, the obstacle detection circuit 13 monitors the terminal voltage of the phase shifting capacitor 9 arranged in the electric motor 4, and the electric motor 4 (switch 5) generated when the shutter curtain 1 contacts the obstacle. Is set so as to output an obstacle detection signal in response to a change in the voltage drop of the output voltage, and output an obstacle avoidance command to the switch 5 based on the output. The circuit configuration allows free switching between the mode and the normal detection mode. That is, in the obstacle detection circuit 13, the terminal voltage from the phase shift capacitor 9 is lowered by passing through the transformer TR, the rectifying bridge D1, the first capacitor C1, the resistor, etc. Are similar voltage output circuit 13a and reference voltage output circuit 13
It is set to branch to b. The similar voltage circuit 13a includes a first shunt regulator IC1 connected in parallel with the first, second and third resistors R1, R2 and R3 connected in series, and the first to third resistors R1 and R3.
2, a fourth resistor R4 connected in series with R3, and a second capacitor C2 connected in parallel with the fourth resistor R4, and outputs the voltage output from the first shunt regulator IC1 to the fourth resistor R4. And the second capacitor C, and is configured to output from the first output line L1 while being held, whereby a voltage similar to the terminal voltage from the phase shift capacitor 9 is output from the first output line L1. Is configured to.

In the present embodiment, the mode switching means 16 of the present invention is configured with respect to the second resistor R2 of the similar voltage output circuit 13a, and an electron is configured by using FET (field effect transistor). Switch T
S are connected in parallel. Then, the electronic switch T
When S is ON, only the first and third resistors R1 and R3 of the first, second and third resistors R1, R2 and R3 connected in series are the first shunt regulator IC.
1 is set so that a small similar voltage to the terminal voltage of the electric motor 4 is output from the output line L1.

On the other hand, the electronic switch TS is OF
In the F operating state, the first, second and third resistors R1,
All of R2 and R3 are set to act on the first shunt regulator IC1.
With respect to the terminal voltage of the electric motor 4, a similar voltage larger than the small similar voltage is set to be output from the output line l1, and thus the electronic switch T is set.
Depending on the ON-OFF switching of S, the similar voltage output circuit 13
The output from a (first output line L1) can be switched between large and small. Incidentally, in the present embodiment, the resistance value switching based on the first, second, and third resistors R1, R2, and R3 is performed by the electric switch TS connected in parallel with the second resistor R2. It is of course possible to use a separate means such as a relay switch as the means for switching.

On the other hand, the reference voltage output circuit 13b includes fifth, sixth and seventh resistors R5, R6 and R7 and these resistors R.
Second shunt regulator IC2 connected in parallel to 5, R6, R7, and the fifth to seventh resistors R5, R6, R
Eighth resistor R8 connected in series with 7, and ninth, tenth resistors R9, R10, and eighth resistor R connected in parallel with the eighth resistor R8.
The third capacitor C3 which is connected in parallel to the ninth resistor R9 in parallel with 8 and the diode DD which is arranged to the ninth resistor R9, and outputs the voltage output from the second shunt regulator IC2. , 8th to 10th resistor R8,
It is configured to output from the second output line L2 while being held by R9 and R10 and the third capacitor, whereby the second output line L2 is affected by the change in the terminal voltage from the phase shift capacitor 9. It is configured to output a reference voltage that has been smoothed and has a preset voltage value. Here, the reference voltage is set to a value that is lower than the small similar voltage while the electric motor 4 is being driven, but higher than the similar voltage when a load acts on the electric motor 4.

Further, the comparator circuit 13c which constitutes the obstacle detection circuit 13 has the similar voltage output circuit 13a.
Output from the first output line L1 and the reference voltage output circuit 1
The output from the first output line L1 is judged to be larger than the output from the second output line L2. The output from the first output line L1 is judged to be larger than the output from the second output line L2. At this time, the comparator CT is set to output. by this,
The terminal voltage of the phase shift capacitor 9 is high (electric motor 4
The output from the comparator circuit 13c is output in the normal driving state of (1), but the terminal voltage of the phase shift capacitor 9 decreases (the load acts on the electric motor 4, that is, the shutter curtain 1 contacts the obstacle). In the (obstacle detection state) and the rotation of the electric motor 4 slows down, the output from the similar voltage output circuit 13a becomes lower than the output from the reference voltage output circuit 13b, and the output from the comparator circuit 13c disappears. It is set so that when the output from the comparator circuit 13c disappears, it is regarded as the output of the obstacle detection signal.

At this time, the similar voltage output circuit 1
Although the detection sensitivity of obstacle detection (load detection) is changed by switching the voltage from 3a between large and small, the detection sensitivity is set smaller when the similar voltage is set larger than when the similar voltage is set large. The obstacle detection signal can be output with high detection sensitivity, that is, the obstacle detection signal can be output in response to a small voltage change of the terminal voltage. As a result, the obstacle detection circuit 13 has a high sensitivity detection mode in which the detection sensitivity is high when the electronic switch TS is in the ON state and the output from the similar voltage output circuit 13a is a small similar voltage. Obstacle detection based on
When the electronic switch TS is in the OFF state and the output from the similar voltage output circuit 13a is a high similar voltage, the obstacle detection based on the normal detection mode having the normal detection sensitivity is set. Has been done. Therefore, the obstacle detection circuit 13 is switched to one of the high sensitivity mode and the normal detection mode, and is set to perform the obstacle detection based on the mode of the switching state.

On the other hand, the full-open detection circuit 14 includes the electric motor 4
It has a circuit configuration for monitoring the switching state of the full-open detection switch 11 provided in the COM terminal and the closing winding 4
It is connected in series with the wiring a, and is wired in parallel with the closing winding 4a. The full-open stop circuit 14 is connected to the first circuit 14a to which the same voltage as the voltage of the electric motor 4 is applied and the first circuit 14a via a first phototransistor PT1 in which a diode is provided bidirectionally. The second circuit 14b is configured to include the second circuit 14b.
It comprises a resistor for outputting the voltage from 4a as a sufficiently reduced direct current voltage and a fourth capacitor C4. Then, when the full-open detection switch 11 is in the ON state and the electric motor 4 is in the open drive, the drive voltage is supplied to the second circuit 15b via the first phototransistor PT1.
Is output from the third output line L3, but the full-open detection switch 11 is turned off and the closing drive of the electric motor 4 is stopped, so that the output disappears. It is set to change.

Further, the fully closed detection circuit 15 is connected in series between the COM terminal and the wiring of the opening winding 4b, and is wired in parallel to the opening winding 4b. Other than that, the configuration is the same as that of the full-open detection circuit 14. By the way, the output from the first circuit 15a of the fully closed detection circuit 15 is supplied to the second phototransistor PT2.
The voltage input via the resistor is the resistance and the fifth capacitor C5.
It is set so as to be output from the fourth output line L4 of the second circuit 15b including. The output is set to be regarded as the output of the full-closed detection signal when there is no output from the fourth output line L4.

Here, the first and second phototransistors PT1 and P are connected between the first and second circuits 14a and 14b or 15a and 15b of the detection circuits 14 and 15, respectively.
It is connected by T2, which is connected to each first circuit 14
This is a consideration for surely insulating a and 15a from the corresponding second circuits 14b and 15b. In addition, in this configuration, when the full-open / full-close detection switches 11 and 10 are in the ON state, the open winding or the close winding 4b of the electric motor 4,
In the state in which the voltage is applied to 4a, the voltage is applied to the corresponding first and second phototransistors PT1 and PT2. At this time, since the voltage is alternating current, the second circuits 14b and 15b input through the phototransistors PT1 and PT2 are repeatedly input ON / OFF at the same frequency as the voltage on the electric motor 4 side. There is. Therefore, by connecting a resistor for providing a double time constant and the fourth capacitor C4 or the fifth capacitor C5, respectively, the fourth or fifth capacitor C4,
The circuit configuration is such that charging to C5 is long, and accordingly, the output is adjusted from each output line L3 or L4 as an output adjusted so that the ON-OFF level becomes clear.

The mode switching means 16 constituting the electronic switch TS is set so that the adjusted full-open detection signal from the second circuit 14b of the full-open detection circuit 14, that is, the third output line L3 is input. ing. further,
The mode switching means 16 includes an operation switch P for opening.
The obstacle detection circuit 13 is set to a high sensitivity based on the fact that the full open detection signal is input in a state where the open signal from the BU is set to be input and the open signal based on the open operation switch PBU is input. A switching command is output to switch to the detection mode, and the electronic switch TS is turned off from the OFF state.
It is set to switch to the N state. Further, the mode switching means 16 is connected with a first timer (corresponding to the timer means of the present invention, that is, the open state detecting means) 17. The first timer 17 is set to the time from when the shutter curtain 1 starts the closing operation to reach an arbitrary closing position, and is configured to start when the closing signal is input from the closing operation switch PBD. Has been done. Then, the first timer 17 has a predetermined first timer time (5 seconds (5.5 seconds) in the present embodiment, which is a time during which the shutter curtain 1 descends by about 50 cm (cm)). The lowering range is reset after a lapse of a voltage change of the switch 5 due to an obstacle), and a first timer elapse signal (corresponding to an open state detection signal) to the mode switching means 16. Yes) is set to be output. And
The mode switching means 16 outputs a switching command in response to the input of the first timer elapsed signal while the electronic switch TS of the obstacle detection circuit 13 is switched to the ON state, and turns off the electronic switch TS from the ON state. It is set to switch to the state. The first timer 17 is set so as to be reset when the input of the closing signal is cut off, and the mode switching means 1 is set by the reset.
6 is set to switch to the OFF state when the electronic switch TS is in the ON state.

On the other hand, the comparator circuit 13c is connected to the switch drive circuit 12 side, and when an obstacle detection signal is output based on one of the detection modes, an obstacle avoidance command is issued to the switch 5. Is output to stop the opening and closing of the switch 5 and open for a predetermined time (3 seconds (3 sec) in this embodiment) set in advance. A second timer 18 is provided between the machine drive circuit 12. Then, in the present embodiment, the obstacle avoidance command based on the obstacle detection signal is the delay time preset by the second timer 18 (waiting time, which is 240 milliseconds (msec) in the present embodiment). It is set to output with a delay.

Further, an output control means 19 is provided between the switch drive circuit 12 and the obstacle detection circuit 13 to wait for the output of the obstacle avoidance command delayed by the second timer 18 (delayed). During a period of time), the output of the obstacle avoidance command is restricted (the output of the obstacle avoidance command is stopped) based on the fact that the obstacle detection signal is constantly detected and the obstacle detection signal disappears. It is set to ignore the obstacle detection signal. Further, the output control means 19 is set so that the full-closed detection circuit 15 is input, and the full-closed detection signal is input while the output of the obstacle avoidance command is on standby (during delay time). The drive stop command is set to be output based on the above.

Next, the control procedure in the control device 8 will be described with reference to the flow charts shown in FIGS. When the power is turned on by turning on the main switch (not shown) to start the system, the control device 8 is initialized and it is determined which signal is the operation signal in response to the operation of the operation tool 7. To do. At this time, if it is an opening signal, opening control is performed to open the shutter curtain 1, if it is a stop signal, stop control is performed to stop the shutter curtain 1, and if it is a closing signal, closing control is performed. .

When the operation signal of the operating tool 7 is an open signal, the control section 8 outputs an open drive command to open the switch 5.
The opening operation of the shutter curtain 1 is started. Subsequently, the control device 8 determines whether or not the stop signal is input, and when the stop signal is input, outputs the drive stop command and shifts to the stop control mode. On the other hand, when the stop signal is not input, the control device 8 determines whether or not the close signal is input, and when the close signal is input, the drive is stopped and then the mode is changed to the close control mode. . On the other hand, when the closing signal is not input, the control device 8 determines whether or not the full opening detection signal is input. When the full opening detection signal is not input, the opening drive is continued, and when the full opening detection signal is received. Then, the drive stop command is output and the electronic switch TS of the obstacle detection circuit 13 is set to the ON state to switch to the high sensitivity detection mode.

On the other hand, when the operation signal of the operating tool 7 is the closing signal, first, whether the shutter curtain 1 is in the fully opened posture (fully opened state), that is, the fully opened detection signal is input and the obstacle detection circuit 13 goes high. When it is determined whether or not the sensitivity detection mode is set, and the full-open detection signal is input, the control device 8 sets (starts) the first timer 17 and outputs a closing drive command to the switch 5. However, the closing operation is set to start in the state where the obstacle is detected in the high sensitivity detection mode. On the other hand, when the full-open detection detection signal is not input, it is determined that the shutter curtain 1 is in the process of closing, and the closing operation is set to be performed in the state where the obstacle detection is performed in the normal detection mode described later. ing.

Then, in the course of the closing operation in the high sensitivity detection mode, the control device 8 judges whether or not the stop signal is input, and when the stop signal is input, the drive stop command is output. , The first timer 17 is reset, and the electronic switch TS of the obstacle detection circuit 13 is accordingly reset.
Is turned off, the high-sensitivity detection mode is switched to the normal detection mode, and then the stop control mode is entered. On the other hand, when the stop signal is not input, the control device 8 determines whether or not the open signal is input. When the open signal is input, the drive stop command is output and the first timer 17 Is reset, the electronic switch TS of the obstacle detection circuit 13 is turned off accordingly, the high sensitivity detection mode is switched to the normal detection mode, and the opening control mode is entered. On the other hand, when the release signal is not input, the control device 8 determines whether the first timer elapsed signal is input,
If it is determined that the obstacle detection signal has not been input, then it is determined whether or not an obstacle detection signal has been input. Then, when the obstacle detection signal is input, the second timer 18 is set, and it is determined whether or not the second timer time of the second timer 18 has elapsed. If it has, the obstacle avoidance command is issued. Is output and the first timer 17 is reset to turn off the electronic switch TS of the obstacle detection circuit 13 to switch the high sensitivity detection mode to the normal detection mode. At this time, depending on the position where the shutter curtain 1 detects the obstacle (open position), the shutter curtain 1 may be in the fully open state based on the obstacle detection operation. In this case, the fully open detection switch 11 By being opened,
The obstacle detection circuit 13 is set to the high sensitivity detection mode. On the other hand, if the obstacle detection signal disappears when the second timer has not elapsed, the obstacle detection is judged to be instantaneous and is ignored, and the high sensitivity detection mode is closed. It is set to continue to operate.

On the other hand, when it is determined that the first timer elapsed signal has been input (the first timer time of the first timer 17 has elapsed), this is regarded as the end of the closing operation in the high sensitivity mode. Then, the obstacle detection circuit 13 is switched to the normal detection mode. Subsequently, the control device 8 determines whether or not the stop signal is input, and when the stop signal is input, outputs the drive stop command and shifts to the stop control mode. On the other hand, when the stop signal is not input, the control device 8 determines whether or not the open signal is input. When the open signal is input, the drive stop command is output to enter the open control mode. Transition. When the opening signal is not input, the control device 8 determines whether the shutter curtain 1 is in the fully closed position and the fully closed detection signal is input, and it is determined that the fully closed detection signal is input. In this case, the shutter curtain 1 outputs a drive stop command as if the shutter curtain 1 has reached the fully closed position,
It is set to stop the driving of the opening / closing device 5 to stop the closing operation of the shutter curtain 1.

On the other hand, when the full-closed detection signal is not input, the closing operation of the shutter curtain 1 is continued and the closing operation of the shutter curtain 1 is continued. In the process, an obstacle interferes with the shutter curtain 1. When a load acts on the switchgear 5, the obstacle detection signal is input to the control device 8. In such a case, the control device 8 sets the second timer 18. Then, when the full-closed detection signal is input while the second timer time has elapsed,
It is set to output a drive stop command on the assumption that the shutter curtain 1 is fully closed. On the other hand, when the full-closed detection signal is not input during the second timer time and the obstacle detection signal is not input, it is determined that the obstacle detection signal is based on instantaneous detection. Then, the closing drive command is output again to continue the closing operation. Further, when the obstacle detection signal is continuously input during the second timer time, the control device 8 regards this as the obstacle detection and issues an obstacle avoidance command, that is, to the switchgear 5. After the drive stop command is output, the open drive command is output for a predetermined time set in advance.

In the embodiment of the present invention configured as described above, the shutter curtain 1 opens and closes the opening portion in accordance with the opening and closing drive of the opening and closing device 5 which is driven based on the drive command from the control device 8. In this case, in the process of closing the shutter curtain 1, it is possible to detect that there is an obstacle in the opening, and to perform a closing operation from a preset fully opened state of the shutter curtain 1 to an arbitrary open position. The detection operation is performed in the high detection mode with high detection sensitivity, and the closing operation thereafter until reaching the fully closed posture is performed in the normal detection mode with the normal detection sensitivity. As a result, when the shutter curtain 1 is in an open state close to the fully open position, the amount of the shutter curtain 1 unrolled is small, and the shutter curtain 1 is abutted against an obstacle. Even in the case where it is difficult to act on, the high-sensitivity detection mode can detect the obstacle, and the obstacle can be detected even with a small load, and the malfunction of the obstacle detection can be prevented.

As described above, in the embodiment of the present invention, in the closing operation of the shutter curtain 1, the high-sensitivity detection mode with high detection sensitivity is set in the initial closing stage where it is difficult to detect an obstacle. After that, the obstacle is detected in the normal detection mode, and the obstacle detection suitable for each open state of the shutter curtain 1 can be performed, which is reliable and stable in the whole closing operation. Moreover, it is possible to detect an obstacle without malfunction.

Further, in this case, the obstacle detection is performed based on the detection of the terminal voltage of the phase shift capacitor 9 provided in the switch 5, while the fully open / fully closed detection switch 1
1 and 10 are configured to be set based on the rotation speed of the electric motor 4. For this reason, when an attempt is made to adjust the obstacle detection, the full-open detection, and the full-close detection, all can be performed by the control device 8, and the adjustment work can be performed with good workability.
Excellent maintainability.

Further, in this configuration, the obstacle avoidance command is output after the second timer time has elapsed after the obstacle detection signal is output, and the obstacle avoidance command is output during the second timer time. When the detection signal disappears, the obstacle detection is instantaneous, and there is no concern that the shutter curtain 1 will pinch the obstacle, and the normal closing operation is continued. Moreover, regarding this control,
Since the obstacle detection in any of the high sensitivity detection mode and the normal detection mode is executed, a stable closing operation of the shutter curtain 1 can be expected.

Moreover, when the fully closed detection signal is input during the second timer time, the drive stop command is output without outputting the obstacle avoidance command so that the shutter curtain 1 is in the fully closed state. Has become. Therefore, in a configuration in which the shutter curtain 1 outputs the fully closed detection signal in a state where the shutter curtain 1 is in the fully closed position as much as possible, the timing and the obstacle at which the fully closed detection signal is output due to the extension of the shutter curtain 1 or the like. Even when the output timing of the object detection signal is reversed, if the full-closed detection signal is output during the timer time,
The stop control of the shutter curtain 1 can be performed with priority given to the fully closed detection signal, and the fully closed detection switch 10 for detecting the fully closed shutter curtain 1 is brought as close as possible to the fully closed posture of the shutter curtain 1. The state can be set, and the obstacle detection of the shutter curtain 1 can be performed over a wide range.

Of course, the present invention is not limited to the above-mentioned embodiment, and as means for detecting obstacles, in addition to the structure in which a phase shift capacitor is provided in the switch, a device in which a light emitting and receiving device is provided, A disc provided with a self-induction coil, a seat plate switch, or the like can be appropriately selected and used as necessary. Further, a detection switch provided on the guide rail or the like can be used as the means for detecting the fully open or fully closed state. Further, as the open state detecting means, not a timer device but a switch such as a switch or a limit switch provided on a guide rail can be adopted.
The high-sensitivity detection mode can be set during the period from the fully opened state to the arbitrary opened state, even if there is a temporary suspension.

[Brief description of drawings]

FIG. 1 is a schematic front view of a shutter device.

FIG. 2 is a circuit configuration diagram illustrating a control state of a shutter device.

FIG. 3 is a circuit diagram illustrating an obstacle detection circuit.

FIG. 4 is a circuit diagram illustrating a fully open / fully closed detection circuit.

FIG. 5 is a block diagram illustrating a control state by a control device.

FIG. 6 is a flowchart illustrating a main routine of a control state by a control device.

FIG. 7 is a flowchart illustrating a release control state that is a subroutine of the control device.

FIG. 8 is a flowchart illustrating a closing control state that is a subroutine of the control device.

[Explanation of symbols]

1 shutter curtain 3 winding drum 4 electric motor 5 switch 6 Guide rail 7 controls 8 control device 9 Phase shift capacitors 10 Fully closed detection switch 12 Switch drive circuit 13 Obstacle detection circuit 13a Similar voltage output circuit 13b Reference voltage output circuit 13c comparator circuit 14 Fully open detection circuit 15 Full close detection circuit 16 mode switching means 17 First timer 18 Second timer 19 Output regulation means

Continued front page    (72) Inventor Yuichi Hatakeyama             2-1, 1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa             Inside Shatter Industry Co., Ltd. (72) Inventor Takeshi Watanabe             3-23-3 Shin-Yokohama, Kohoku Ward, Yokohama City, Kanagawa Prefecture             Issue Shin-Yokohama Tobu AK Building Somfy Stock Association             In-house F-term (reference) 2E042 AA01 CA01 CB05 CB06 CC00                 2E052 AA04 BA02 CA06 EA14 EB01                       EC01 GA08 GB06 GC06 GD03                       GD09 GD11 HA01 KA15

Claims (6)

[Claims] 1. An obstacle detection means for outputting an obstacle detection signal to a control device for a switch that opens and closes the switch, based on a voltage change of the switch associated with the detection of an obstacle during the closing operation of the switch. In providing the above, the obstacle detection means outputs a high sensitivity detection mode in which an obstacle detection signal is output based on detection of a small voltage change set in advance, and an obstacle detection signal is output based on a larger voltage change. While it is configured to be able to switch to the normal detection mode, the control device outputs a full-open detection signal to the control device by detecting that the opening / closing body is fully opened, and the opening / closing body is changed from the fully opened state to an arbitrary opened state. The open state detection means for detecting that the open state detection signal is output, and the obstacle detection means are switched to the high sensitivity detection mode in response to the input of the full open detection signal, and the open state detection signal is input. An obstacle detection structure for an electrically-operated opening / closing body for construction, which is provided with a mode switching means for outputting a switching command for switching from a high-sensitivity detection mode to a normal detection mode. 2. The asynchronous single-phase motor is used as the switch according to claim 1, and the obstacle detection means is a reference and a similar voltage circuit connected to a terminal voltage of a phase-shifting capacitor provided in the asynchronous single-phase motor. A voltage circuit and a comparator circuit that compares the voltages from these voltage circuits are provided, and the obstacle voltage detection signal is output when the voltage from the similar voltage circuit falls below the voltage from the reference voltage circuit. An obstacle detection structure for an electrically-operated opening / closing body for construction, wherein the obstacle detection means is configured to switch between a high-sensitivity detection mode and a normal detection mode based on switching the resistance value constituting the. 3. The obstacle detection structure for an electrically-operated opening / closing body according to claim 2, wherein the mode switching means is composed of a changeover switch connected in parallel with a resistance of the similar voltage circuit. 4. The full-open detection means according to claim 2, wherein the full-open detection means is connected in parallel to the full-open detection switch connected in series to the opening wiring of the asynchronous single-phase motor, and the first circuit is connected to the first circuit. And a second circuit having a resistor and a capacitor, which are connected via a photocoupler, and an obstacle detection structure for an electrically-operated opening / closing body for construction. 5. The open state detection means according to claim 1, wherein the open state detector is started by starting the closing operation from the fully opened state, and the open state is opened after a preset timer time has elapsed. An obstacle detection structure for an electrically-operated opening / closing body for construction, which comprises timer means for outputting a state detection signal. 6. The timer means according to claim 5, wherein the timer means is reset by outputting a drive stop command during a preset timer time, and the obstacle detecting means is switched from the high sensitivity detecting mode to the normal detecting mode. The structure for detecting an obstacle of an electric opening / closing body for construction configured as described above.