JP4543497B2 - Electric shutter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a shutter device that opens and closes an opening such as a window or an entrance of a building, and particularly relates to an electric shutter device that opens and closes a shutter curtain by an electric motor.
[0002]
[Prior art]
As a conventional electric shutter device, for example, there is one described in JP-A-10-169341. This conventional apparatus includes an electric motor for opening and closing the shutter curtain, an operation switch for instructing opening, stopping, and closing of the shutter curtain, an upper limit switch for detecting full opening of the shutter curtain, and a lower limit for detecting full closing of the shutter curtain. Limit switches, obstacle detection switches that detect interference between the bottom seat plate of the shutter curtain and obstacles, and signals generated by these switches are input, and the motor is controlled to open, stop, and close based on the input signals. A control unit for controlling, and a solenoid for automatically locking the shutter curtain and the guide rail moved to the fully closed position.
[0003]
[Problems to be solved by the invention]
The above-described conventional apparatus has a problem that a secondary abnormality occurs when an operation switch is operated under the occurrence of an abnormality, without dealing with an abnormality occurring in a component. For example, when an open or close switch is operated in a state where the shutter curtain is in a fully closed or fully open state and the guide rail is frozen and the shutter curtain cannot be opened or closed, There is a problem that the motor and the shutter curtain are damaged due to overloading the shutter curtain and excessive extension of the shutter curtain.
[0006]
An object of the invention of this application is to provide an electric shutter driving device that solves the above problems.
[0007]
[Means for Solving the Problems]
  The invention according to claim 1 of the present application is directed to an electric motor that opens and closes a shutter curtain, and the electric motor receives an instruction to open, close, or stop by an operation unit.TheA control unit for instructing an open drive or a closed drive or a stop;And an electric shutter device including position detection means for detecting whether the position of the shutter curtain is in a fully closed region or a non-fully closed region and inputting the position to the control unit. When the shutter curtain is lifted and the input from the position detection means is changed from the fully closed region to the non-fully closed region under the stop state where the curtain is driven to the fully closed position and stopped at the fully closed position. In addition, the control unit is closed by stopping the closed drive when the fully closed region is reached and when the closed region is changed from the fully closed region to the non-closed region again. From the time when the switching from the stop state, which is driven and stopped at the fully closed position, is first instructed to switch to the closed drive, the closed drive with the shutter curtain as the fully closed region is performed for a predetermined time tg.This is a shutter device.
  According to the above-described configuration, when the shutter curtain in the closed area is to be opened improperly, the control unit switches the instruction from the stop to the closed drive, and the motor is driven to close and the shutter curtain is extended to release the shutter. Curtain opening is prevented. The shutter curtain is closed by an illegal intruder who lifts the shutter curtain from the outside and attempts to open it illegally and packs foreign matter into the gap formed between the seat plate at the lower end of the shutter curtain and the lower frame. If the input from the detection means to the control unit is switched from the non-closed region to the closed region, the control unit stops the instruction, and thereby the shutter curtain feed load Therefore, the shutter curtain moves slightly to the open side, whereby the input from the detection means to the control unit is switched from the closed region to the non-closed region, so that the control unit switches the instruction to the drive circuit unit from stop to closed drive. Is repeated, the driving time of the electric motor is limited to the predetermined time tg. Rises to a temperature of the motor allowable upper limit temperature by continued driving, driving of the electric motor at work desuperheater can be avoided occurrence of problems referred to stop.
  In this case, after the shutter curtain is closed and driven for a predetermined time tg, the control unit may be configured to instruct the opening drive for the predetermined time th.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view showing a schematic configuration of an electric shutter device 10 that opens and closes an opening such as a window or an entrance of a house. As shown in FIG. 1, the electric shutter device 10 includes a pair of left and right fixed guide rails 11 and 12 disposed at the left and right ends of the opening, and a fixed shutter case 13 disposed at the upper ends of the guide rails. Have The guide rails 11 and 12 guide the left and right side end portions of the shutter curtain 14 so as to be movable up and down. The shutter curtain 14 is configured by connecting a large number of slats 15 that are long in the left-right direction and connecting a seat plate 16 to the lower side of the lowermost slat 15.
[0035]
The upper end of the shutter curtain 14 is connected to a rotatable take-up drum 17 disposed inside the shutter case 13. Inside the take-up drum 17 is disposed a balance spring mechanism 18 that counteracts the torque applied to the take-up drum 17 by the dead weight of the shutter curtain 14 and applies almost the same magnitude of torque to the take-up drum 17. An electric motor 20 that drives the take-up drum 17 via the speed reducer 19 is arranged. Accordingly, when the electric motor 20 is driven to open (energized to rotate in one direction), the shutter curtain 14 is wound around the winding drum 17 and the opening is opened. Further, when the electric motor 20 is driven to close (energized so as to rotate in the other direction), the shutter curtain 14 is drawn out from the winding drum 17 and the opening is closed. When the electric motor 20 is stopped, the position of the shutter curtain 14 is held by the balance spring mechanism 18.
[0036]
Next, the electrical configuration of the electric shutter device 10 will be described. FIG. 2 is a schematic block diagram. As shown in FIG. 3, the operation unit 21 is provided with an open switch 21a, a close switch 21b, and a turn-off switch 21c operated by the user, and notification lights 21d and 21e. And are provided. When the user operates the open switch 21a, a pulse signal that is an open command is input to the control unit 22, and when the user operates the close switch 21b, a pulse signal that is a close command is input to the control unit 22 and the user turns off the switch. When the switch 21 c is operated, a pulse signal that is a stop command is input to the control unit 22. A light receiving element of a wireless remote controller may be added to the operation unit 21, and an open command, a close command, and a stop command may be input from the operation unit 21 to the control unit 22 by operating the wireless remote control. The control unit 22 includes a microcomputer, a ROM, a timer, and the like. The control unit 22 instructs the drive circuit unit 23 of the electric motor 20 to open, close, or stop, and controls turning on / off of the notification lamps 21d and 21e. To do. The control unit 22 includes a binary signal that is switched by turning on and off a position detection switch (position detecting means) 24 that detects whether or not the position of the shutter curtain 14 is in a fully open region, and the position of the shutter curtain 14 is in a fully closed region. A position detection switch (position detection means) 25 for detecting whether or not a binary signal that is switched by turning on and off, an obstacle detection switch for detecting whether or not an upward load is applied to the seat plate 16 ( Operation detection circuit unit for detecting whether or not the binary signal that is switched by turning on and off the obstacle detection means) 26, and whether or not the drive circuit unit 23 is operating in accordance with an instruction for opening or closing driving from the control unit 22 The output of the (operation detection means) 27 is input.
[0037]
The position detection switches 24 and 25 and the obstacle detection switch 26 are arranged inside the guide rail 11 as shown in FIG. If the position of the shutter curtain 14 is in the fully open area, the position detection switch 24 is turned on. If the position of the shutter curtain 14 is not in the fully open area, the position detection switch 24 is turned off. The width of the fully open region is narrow, and the position of the shutter curtain 14 at the time when the position detection switch 24 is switched from OFF to ON matches the fully open position. If the position of the shutter curtain 14 is a fully closed region, the position detection switch 25 is turned on. If the position of the shutter curtain 14 is not a fully closed region, the position detection switch 25 is turned off. The width of the fully closed area is considerably wider than the width of the fully open area, and the position of the shutter curtain 14 is several centimeters before the fully closed position when the position detection switch 25 is switched from OFF to ON. The operation unit 21, the control unit 22, the drive circuit unit 23, and the operation detection circuit unit 27 are integrated and disposed in the room.
[0038]
In order to turn on and off the obstacle detection switch 26, the seat plate 16 includes an upper seat plate 16a that allows the left and right end portions to be held up and down by the guide rails 11 and 12, and an upper seat plate 16a that is centered in the left-right direction. The lower seat plate 16b is connected to the guide rails 11 and 12 so as not to hold the left and right end portions. The lower seat plate 16b normally occupies a normal position that is most rotated downward relative to the upper seat plate 16a due to its own weight. However, when an upward load is applied, the lower seat plate 16b moves upward with respect to the upper seat plate 16a. Rotated in the direction. A switch operating mechanism that operates the operation element of the obstacle detection switch 26 in conjunction with the relative rotation of the lower seat plate 16b with respect to the upper seat plate 16a is disposed inside the guide rail 11. If an upward load is not applied to the lower seat plate 16b, the obstacle detection switch 26 is turned off. If an upward load is applied to the lower seat plate 16b, the obstacle detection switch 26 is turned on. . The upward rotation of the lower seat plate 16b with respect to the upper seat plate 16a is also brought about by contact between the lower seat plate 16b and the lower frame of the opening, and the shutter curtain 14 is closed to the fully closed position. When reaching, the obstacle detection switch 26 is switched from OFF to ON.
[0039]
As shown in FIG. 4, the drive circuit unit 23 includes a relay 23 a for switching between driving and stopping of the electric motor 20, a relay 23 b for switching a driving mode (open driving and closed driving), and a driving capacitor 23 c. The instruction of the control unit 22 to the drive circuit unit 23 is represented by a combination of a binary signal at the terminal 22a and a binary signal at the terminal 22b. The instruction to open is expressed by setting both the terminals 22a and 22b to a high level, the instruction to close is expressed by setting the terminal 22a to a high level and the terminal 22b to a low level, and the instruction to stop is a terminal. This is expressed by setting both 22a and 22b to a low level. When the control unit 22 instructs the drive circuit 23 to stop, both the transistors Tr1 and Tr2 are turned off, the relay 23a is turned off when the transistor Tr1 is turned off, and the relay 23b is returned to the closed side when the transistor Tr1 is turned off. When the control unit 22 instructs the drive circuit unit 23 to perform the closed drive, the transistor Tr1 is turned on and the relay 23a is turned on, but the transistor Tr2 remains off. When the control device 22 instructs the drive circuit unit 23 to open, the transistor Tr1 is turned on and the relay 23a is turned on, and the transistor Tr2 is turned on and the relay 23b is switched to the open side. Therefore, if there is no abnormality in the drive circuit unit 23 and the electric motor 20, the electric motor 20 is opened, closed, or stopped according to an instruction from the control unit 22 to the drive circuit unit 23.
[0040]
The operation detection circuit unit 27 that detects whether or not the drive circuit unit 23 is operating in accordance with the instruction of the open drive or the close drive of the control unit 22 is configured such that the drive circuit unit 23 is in the closed drive state and the electric motor 20 is closed. The photocoupler 27a is turned off when the drive circuit unit 23 is open and the motor 20 is driven open, and the motor 20 is opened when the drive circuit unit 23 is open. There is a photocoupler 27b that is sometimes turned off and turned on when the drive circuit unit 23 is in the closed drive state and the electric motor 20 is driven to be closed. A binary signal that is switched when the photocoupler 27b is turned on and off is input to the terminal 22c of the control device 22, and a binary signal that is switched when the photocoupler 27b is turned on and off is input to the terminal 22d of the control device 22. The control unit 22 determines whether or not the drive circuit unit 23 is operating in accordance with the instructions based on the instructions for the open drive and the close drive to the drive circuit unit 23 and the signal levels of the terminals 22c and 22d. If the operation is not performed, the notification lamp 21d of the operation unit 21 is configured to blink in the first predetermined cycle in order to notify the occurrence of an abnormality and the abnormal state.
[0041]
FIG. 5 is a time chart showing a normal operation of moving the shutter curtain 14 from the fully open position to the fully closed position by one-touch operation of the close switch 21a of the operation unit 21. In FIG. 5, when the user operates the close switch 21 b of the operation unit 21, the control unit 22 receives an instruction from the operation unit 21 and switches the instruction to the drive circuit unit 23 from stop to closed drive and is in operation. The notification lamp 21d of the operation unit 21 is switched from extinguished to lit, and the elapsed time from when the instruction to the driving unit 23 is switched from the stop to the closed driving is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive, the drive circuit unit 23 drives the motor 20 to close, the motor 20 drives the shutter curtain 14 to close, and the position of the shutter curtain 14 is fully opened. The position detection switch 24 is switched from on to off at the time of moving out of the region. When the shutter curtain 14 moves toward the fully closed position and the position of the shutter curtain 14 reaches the start of the fully closed area, the position detection switch 25 is switched from OFF to ON, and then the position of the shutter curtain 14 is changed to the fully closed area. The lower seat plate 16b is rotated upward by the lower frame of the opening when the end of the obstacle is reached, and the obstacle detection switch 26 is switched from OFF to ON. The control unit 22 measures the elapsed time from the time when the position detection switch 25 is switched from OFF to ON, and a predetermined time ta (from the start to the end of the fully closed region) from the time when the position detection switch 25 is switched from OFF to ON. If the obstacle detection switch 26 is switched from OFF to ON before the time required for movement) elapses, the instruction to the drive circuit unit 23 is switched from closed drive to stop when the obstacle detection switch 26 is switched. If the obstacle detection switch 26 does not switch from OFF to ON after the detection switch 25 switches from OFF to ON until the predetermined time ta elapses, an instruction is given to the drive circuit unit 23 when the predetermined time ta has elapsed. In addition to switching from closed drive to stop and switching the instruction to the drive circuit unit 23 from closed drive to stop Turning off the notification light 21d to notify that not in motion.
[0042]
As shown in FIG. 5, the control unit 22 receives a command from the operation unit 21 and moves the instruction to the drive circuit unit 23 from the stop to the closed drive for a predetermined time tb (moves from the inside of the fully open region to the outside). If the position detection switch 24 does not switch from on to off even after the required time has elapsed, the instruction for the drive circuit unit 23 is switched from the closed drive to the stop, and the occurrence of an abnormality and an abnormal mode are notified. The alarm lamp 21d blinks in a second predetermined cycle different from the first predetermined cycle, and commands other than stop are not accepted. The control unit 22 receives a command from the operation unit 21 and switches the instruction to the drive circuit unit 23 from stop to closed drive for a predetermined time tc (slightly longer than the required time to move from the fully open position to the fully closed position). If the position detection switch 25 does not switch from OFF to ON even after a long time elapses, the instruction to the drive circuit unit 23 is switched from the closed drive to the stop when the predetermined time tc elapses, and the occurrence of abnormalities and abnormal modes are changed. In order to notify, the notification lamp 21d blinks in the second predetermined cycle, and commands other than the stop are not accepted.
[0043]
FIG. 6 is a time chart showing a normal operation of moving the shutter curtain 14 from the fully closed position to the fully open position by one-touch operation of the closing switch 21b of the operation unit 21. In FIG. 6, when the user operates the open switch 21 a of the operation unit 21, the control unit 22 receives an instruction from the operation unit 21 and switches the instruction to the drive circuit unit 23 from stop to open drive and is in operation. The notification lamp 21d of the operation unit 21 is switched from extinguished to lit, and the elapsed time from when the instruction to the drive circuit unit 23 is switched from stop to open drive is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from stop to open drive, the drive circuit unit 23 opens the motor 20, the motor 20 opens the shutter curtain 14, and the movement of the shutter curtain 14 causes a failure. The object detection switch 26 is switched from on to off, and then the position detection switch 25 is switched from on to off when the position of the shutter curtain 14 moves outside the fully closed region. When the shutter curtain 14 moves toward the fully open position and the position of the shutter curtain 14 reaches the fully open area, the position detection switch 24 is switched from OFF to ON. The control unit 22 operates in conjunction with switching the instruction for the drive circuit unit 23 from the open drive to the stop when the position detection switch 24 is switched from OFF to ON, and switching the instruction for the drive circuit unit 23 from the closed drive to the stop. In order to notify that it is not in the middle, the notification lamp 21d is turned off.
[0044]
As shown in FIG. 6, the control unit 22 receives a command from the operation unit 21 and moves the instruction to the drive circuit unit 23 from the stop to the open drive for a predetermined time td (moves from the inside of the fully closed region to the outside). If the position detection switch 25 does not switch from on to off even after a certain period of time has elapsed, the instruction to the drive circuit unit 23 is switched from open drive to stop and the occurrence of an abnormality and an abnormal mode are notified. Therefore, the notification lamp 21d blinks in the second predetermined cycle, and no command other than stop is accepted. Further, the control unit 22 receives a command from the operation unit 21 and switches the instruction to the drive circuit unit 23 from stop to open drive for a predetermined time te (a little time required for moving from the fully closed position to the fully open position). If the position detection switch 24 does not switch from off to on even after a long time has elapsed, the instruction to the drive circuit unit 23 is switched from open drive to stop when the predetermined time te elapses, and the occurrence of an abnormality and an abnormal state are detected. In order to notify, the notification lamp 21d blinks in the second predetermined cycle, and commands other than the stop are not accepted.
[0045]
In FIG. 5, when the user operates the turn-off switch 21 c of the operation unit 21 before the position of the shutter curtain 14 reaches the fully closed position, the control unit 22 receives a command from the operation unit 21 and receives a command from the drive circuit unit 23. Is switched from the closed drive to the stop and the notification lamp 21d is turned off, so that the drive circuit unit 23 stops the motor 20 and the shutter curtain 14 is closed. Similarly, in FIG. 6, when the user operates the turn-off switch 21 c of the operation unit 21 before the position of the shutter curtain 14 reaches the fully open position, the control unit 22 receives a command from the operation unit 21 and receives a drive circuit. Since the instruction to the unit 23 is switched from the opening drive to the stop and the notification lamp 21d is turned off, the drive circuit unit 23 stops the electric motor 20 and the opening operation of the shutter curtain 14 is stopped. Therefore, the user can set the position of the shutter curtain 14 to a desired position by selectively operating the open switch 21a, the close switch 21b, and the off switch 21c while visually checking the position of the shutter curtain 14.
[0046]
As shown in FIGS. 5 and 6, if each of the position detection switches 24 and 25 is normal, both the position detection switches 24 and 25 are not turned on, and both the position detection switches 24 and 25 are turned on. Being present means that one of the position detection switches 24 and 25 has failed. Therefore, when both the position detection switches 24 and 25 are on, the control unit 22 stops the instruction to the drive circuit unit 23 and does not accept the command from the operation unit 21, and also notifies the occurrence of abnormality and the abnormal mode. In order to do this, the notification lamp 21d blinks in a third predetermined cycle different from the first and second predetermined cycles.
[0047]
When the obstacle detection switch 26 is switched from OFF to ON while the shutter curtain 14 is moving toward the fully closed region, the control unit 22 switches the instruction for the drive circuit unit 23 from closed drive to stop, and then opens it. The drive is instructed for a predetermined time (several seconds), and the notification lamp 21d is flashed for a predetermined time in order to notify the occurrence of an abnormality and the abnormal state, and the operation unit 21 is instructed to close while the notification lamp 21d is flashing. Will no longer be accepted.
[0048]
The control unit 22 shifts to the lock mode when a predetermined time (several seconds) elapses from the time when the driving of the shutter curtain 14 to the fully closed position is completed, and sets the notification lamp 21e to notify that it is in the lock mode. Switch from off to on. The operation in this lock mode is shown in FIGS.
[0049]
FIG. 7 shows the operation when the shutter curtain 14 in the fully closed position is temporarily lifted out of the fully closed region by the wind pressure under strong wind. As shown in FIG. 7, the control unit 22 is driven. When the shutter curtain 14 is lifted to the outside of the fully closed area by the wind pressure under the state where the instruction to the circuit unit 23 is stopped, the obstacle detection switch 26 is first switched from ON to OFF, and then the position of the shutter curtain 14 is fully set. The position detection switch 25 is switched from on to off at the time of moving outside the closed region. When the position detection switch 25 is switched from on to off, the control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive, and from the time when the instruction to the drive circuit unit 23 is switched from stop to closed drive. The elapsed time is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from the stop to the close drive, the drive circuit unit 23 drives the motor 20 to close, the shutter curtain 14 is driven to close, and the shutter curtain 14 is prevented from further opening. . The shutter curtain lifting action by the wind pressure does not continue for a long time, and the control unit 22 switches the instruction to the drive circuit unit 23 from the stop to the closed drive for a predetermined time tf (the lifting of the shutter curtain 14 is artificial. The position detection switch 25 is switched from OFF to ON when the position of the shutter curtain 14 moves into the fully closed region before a lapse of several tens of seconds). The unit 22 switches the instruction to the drive circuit unit 23 from the closed drive to the stop when a predetermined time ta has elapsed since the position detection switch 25 was switched from on to off due to the obstacle detection switch 26 being off.
[0050]
FIG. 8 shows the operation when the shutter curtain 14 in the fully closed position is lifted out of the fully closed area by an illegal intruder. Even in this case, the control unit 22 is driven by the shutter curtain 14 being lifted to the outside of the fully closed region and the position detection switch 25 being switched from on to off under a state where the instruction to the drive circuit unit 23 is stopped. The elapsed time from when the instruction to the circuit unit 23 is switched from stop to closed drive and the instruction to the drive circuit unit 23 is switched from stop to closed drive is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive, the drive circuit unit 23 drives the motor 20 to close, the shutter curtain 14 is driven to close, and the shutter curtain 14 is prevented from being further opened. To do. The control unit 22 alternately turns on the notification lamps 21d and 21e in order to notify that the lock operation is being performed when the instruction time for the closing drive to the drive circuit unit 23 reaches the predetermined time tf. Thereafter, when a trespasser gives up the trespass and stops lifting the shutter curtain 14, the obstacle detection switch 26 is switched from on to off, and the shutter curtain 14 is closed. When the position of the shutter curtain 14 moves into the fully closed region, the position detection switch 25 is switched from OFF to ON, and the control unit 22 switches the position detection switch 25 from ON to OFF because the obstacle detection switch 26 is OFF. When a predetermined time ta has elapsed from the time of switching, the instruction to the drive circuit unit 23 is switched from the closed drive to the stop, and the notification lamp 21e is blinked in a predetermined cycle in order to notify that illegal intrusion has occurred.
[0051]
FIG. 9 shows that the shutter curtain 14 in the fully closed position is lifted out of the fully closed area by the illegal intruder, and the illegal intruder packs a foreign object into the gap between the seat plate 16 of the shutter curtain 14 and the lower frame of the opening. Thus, the operation when the shutter curtain 14 cannot return to the fully closed region is shown. Even in this case, the control unit 22 is driven by the shutter curtain 14 being lifted to the outside of the fully closed region and the position detection switch 25 being switched from on to off under a state where the instruction to the drive circuit unit 23 is stopped. The elapsed time from when the instruction to the circuit unit 23 is switched from stop to closed drive and the instruction to the drive circuit unit 23 is switched from stop to closed drive is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive, the drive circuit unit 23 drives the motor 20 to close, the shutter curtain 14 is driven to close, and the shutter curtain 14 is prevented from being further opened. To do. Even if an illegal intruder gives up the illegal intrusion and stops lifting the shutter curtain, the shutter curtain 14 cannot return to the fully closed area due to the stuffing of foreign matter, so the control unit 22 continues to instruct the drive circuit unit 23 to perform the closing drive. . The control unit 22 turns on the notification lamps 21d and 21e alternately when the instruction time for the closing drive to the drive circuit unit 23 reaches the predetermined time tf, and the instruction time for the closing drive to the drive circuit unit 23 is the predetermined time tg ( When the temperature of the electric motor 20 reaches the allowable upper limit temperature), the instruction for the drive circuit unit 23 is switched from the closed drive to the stop. Subsequently, the control unit 22 instructs the drive circuit unit 23 to open the drive circuit unit 23 for a predetermined time th (several seconds) in order to drop the packed foreign matter, and slightly moves the shutter curtain 14 to the open side. Thereby, the obstacle detection switch 26 is switched from on to off.
[0052]
Thereafter, when an intruder tries to lift the shutter curtain 14 again, the obstacle detection switch 26 is switched from OFF to ON. The control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive when the obstacle detection switch 26 is switched from off to on, the drive circuit unit 23 drives the motor 20 to close, and the shutter curtain 14 further Stop being opened.
[0053]
FIG. 10 shows that the shutter curtain 14 in the fully closed position is lifted to the outside of the fully closed region by the illegal intruder, and the illegal intruder packs a foreign object into the gap between the seat plate 16 of the shutter curtain 14 and the lower frame of the opening. Thus, the operation is shown when the shutter curtain 14 can return to the beginning of the fully closed region but cannot return any further. Even in this case, the control unit 22 is driven by the shutter curtain 14 being lifted to the outside of the fully closed region and the position detection switch 25 being switched from on to off under a state where the instruction to the drive circuit unit 23 is stopped. The elapsed time from when the instruction to the circuit unit 23 is switched from stop to closed drive and the instruction to the drive circuit unit 23 is switched from stop to closed drive is counted. When the control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive, the drive circuit unit 23 drives the motor 20 to close, the shutter curtain 14 is driven to close, and the shutter curtain 14 is prevented from being further opened. To do. When a trespasser gives up trespassing and stops lifting the shutter curtain 14, the shutter curtain 14 is closed and the position detection switch 25 is turned on when the shutter curtain 14 moves to the start of the fully closed region. Switch to As the position detection switch 25 is switched, the control unit 22 switches the instruction to the drive circuit unit 23 from the closed drive to the stop, and measures the elapsed time from the time when the instruction to the drive circuit unit 23 is switched from the closed drive to the stop. As the shutter driving force of the shutter curtain 14 disappears, the shutter curtain 14 is slightly opened by the restoring force of the foreign matter, and the position detection switch 25 is switched from on to off again. The control unit 22 switches the instruction to the drive unit 23 from stop to closed drive again when the position detection switch 25 is switched from on to off. The control unit 22 switches from the closed drive to the stop if the time ti from when the instruction to the drive unit 23 is switched from the closed drive to the stop until the switch from the stop to the closed drive is less than a predetermined time (about several seconds). Judge that there is no. Therefore, when the control unit 22 repeatedly switches from the stop to the closed drive before the predetermined time elapses from the time when the instruction to the drive unit 23 is switched from the closed drive to the stop, the control unit 22 issues the instruction to the drive circuit unit 23. When the predetermined time tf is reached from the time when the first closed driving is performed, the notification lamps 21d and 21e are alternately turned on, and when the instruction time for the closing drive to the drive circuit unit 23 reaches the predetermined time tg, the drive circuit unit 23 The instruction for is switched from closed drive to stop. Subsequently, the control unit 22 instructs the drive circuit 23 to open the drive circuit 23 for a predetermined time th (about several seconds) in order to drop the packed foreign matter, and slightly moves the shutter curtain 14 to the open side. Thereby, the obstacle detection switch 26 is switched from on to off.
[0054]
Thereafter, when an intruder tries to lift the shutter curtain 14 again, the obstacle detection switch 26 is switched from OFF to ON. The control unit 22 switches the instruction to the drive circuit unit 23 from stop to closed drive when the obstacle detection switch 26 is switched from off to on, the drive circuit unit 23 drives the motor 20 to close, and the shutter curtain 14 further Stop being opened.
[0055]
In the embodiment described above, the notification lamps 21d and 21e are alternately turned on when the closing drive instruction time reaches the predetermined time tf in the lock mode. 21d and 21e may be turned on alternately.
[0056]
  As described above, according to the invention of this application, the occurrence of a secondary failure can be prevented in advance by appropriately responding to the occurrence of an abnormality..
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic structure of an electric shutter device.
FIG. 2 is a schematic block diagram showing an electrical configuration of the electric shutter device.
FIG. 3 is a diagram illustrating an operation unit.
FIG. 4 is a diagram showing an electric motor drive circuit.
FIG. 5 is a time chart showing the operation.
FIG. 6 is a time chart showing the operation.
FIG. 7 is a time chart showing the operation.
FIG. 8 is a time chart showing the operation.
FIG. 9 is a time chart showing the operation.
FIG. 10 is a time chart showing the operation.
[Explanation of symbols]
10 ... Electric shutter device
14 ... Shutter curtain
20 ... Electric motor
21 ... Control unit
22 ... Control unit
23 ... Drive circuit section
24, 25 ... position detection switch (position detection means)
26. Obstacle detection switch (obstacle detection means)
27... Motion detection circuit unit (motion detection means)

Claims (2)

An electric motor for opening and closing the shutter curtain;
A control unit that receives an instruction to open, close, or stop by the operation unit, and instructs the motor to open, close, or stop ;
In the electric shutter device provided with position detecting means for detecting whether the position of the shutter curtain is in a fully closed region or a non-closed region, and inputting to the control unit,
The control unit drives the shutter curtain to the fully closed position and stops at the fully closed position, and when the shutter curtain is lifted, the input from the position detection unit is not input from the fully closed region. When it becomes a fully closed area, it is closed and stopped when it becomes a fully closed area, and when it becomes a non-closed area again from the fully closed area, it is driven from the non-closed area again. Thus, the control unit performs the closed drive with the shutter curtain as a fully closed region only for a predetermined time tg from the time when the control unit first instructed to switch from the stopped state stopped at the fully closed position to the closed drive. An electric shutter device characterized in that it is performed . 2. The electric shutter device according to claim 1, wherein after the shutter curtain is driven to close for a predetermined time tg, the control unit instructs to open the predetermined time th .

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