JP2747688B2 - Electric shutter device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shutter device, and more particularly, to an electric shutter device that raises or lowers a shutter by a driving force of a motor. [Prior Art] FIG. 5 is a diagram showing an outline of a conventional electric shutter device. In FIG. 5, when the shutter curtain 1 is wound by a drum 2 provided on a ceiling 4, the shutter curtain 1 rises and is opened. The drum 2 is driven by a motor 3. When the motor 3 rotates forward, the drum 2 winds up the shutter curtain 1, and when the motor 3 rotates reversely, the shutter curtain 1 is lowered and closed. A switch 6 is provided to select whether the shutter curtain 1 is raised, lowered, or stopped. A seat switch 72 and a transmitter 7 are arranged at the lower end of the shutter curtain 1, and a receiver 5 is arranged on the ceiling 4. When an object such as an obstacle is present at the lower end of the shutter curtain 1, the transmitter 7 transmits an obstacle detection signal by radio waves or light to the receiver 5.
To send to. When receiving the obstacle detection signal, the receiver 5 stops the motor 3. [Problem to be Solved by the Invention] In the conventional electric shutter device configured as described above, when any disturbance is applied to the receiver 5, for example, radio waves of the same frequency are mixed from other electronic devices or the same wavelength is used. When the light is mixed, the radio wave and light from the transmitter 7 cannot be received, and the obstacle detection signal from the transmitter 7 may not be decoded. For this reason, even if an obstacle is present at the lower end of the shutter curtain 1, the motor 3 does not stop and the shutter curtain 1 continues to descend, and the lower end of the shutter curtain 1 comes into contact with the obstacle and is damaged, If a person was standing under 1, there was a risk of causing personal injury and there was a problem with safety. Therefore, a main object of the present invention is to continuously or intermittently transmit a signal from a transmitting side, to stop transmission of a signal when an obstacle exists, and to receive a signal from a transmitting side on a receiving side. An object of the present invention is to provide an electric shutter device in which the shutter can be opened and closed only when a signal is normally received, thereby improving safety. Means for Solving the Problems The present invention controls the drive of a motor for opening and closing a shutter curtain by controlling a motor-side control unit to which a control signal from a transmission unit provided on the shutter curtain is input. In the electric shutter device configured to perform the operation based on an instruction, the motor-side control unit has an opening / closing operation switch for instructing opening / closing of the shutter and an input of a switch signal from the opening / closing operation switch, and is predetermined by the transmission unit. Timer means that is set when data is input, and a motor drive control mechanism that drives the motor until the timer means measures a predetermined time and stops driving the motor in response to measuring the predetermined time. At the lower end of the shutter curtain, an obstacle detecting means for detecting an obstacle and the shutter curtain are fully opened. The output of the upper-limit position detecting means for detecting that an obstacle has been detected, the obstacle detecting means, the upper-limit position detecting means, and the transmitting means are connected, and an output command of a control signal to the transmitting means is input when at least one of the detection signals is input. And a curtain-side control unit that is set to stop when the operation is stopped. [Effect] The electric shutter device according to the present invention sets the timer means and controls the drive of the motor when predetermined data is input from the transmission means in the state where the switch signal is input from the opening / closing operation switch. When an obstacle is detected in the open / close drive state, the control unit does not output the control signal, and when the timer measures a predetermined time, the shutter opening / closing operation is urgently stopped. Also, when the shutter curtain is fully opened and fully closed, an output of a control command from the transmitting means is performed by detecting whether the upper limit position detecting means, the obstacle detecting means, and the obstacle detecting means provided on the shutter curtain side are fully opened and fully closed. Perform a stop. FIG. 2 is a block diagram of a transmitter included in an embodiment of the present invention, and FIG. 3 is a block diagram of a receiver similarly. First, the configurations of the transmitter 7 and the receiver 5 will be described with reference to FIG. 2 and FIG. Transmitter 7 has batteries 71
Is provided, and a DC voltage is supplied from the battery 71 to the control unit 76. A dead battery detection circuit 74 is provided to detect a dead battery of the battery 71. The detection output of the dead battery detection circuit 74 is inverted by the inverter 75 and provided to the control unit 76. Further, the transmitter 7 has a seat plate switch 72 for detecting the presence of an obstacle at the lower end of the shutter curtain 1.
Is provided. When detecting the obstacle, the seat switch 72 closes the contact and sets the input of the inverter 73 to the “L” level. This obstacle detection signal is inverted by the inverter 73 and provided to the control unit 76. An upper limit switch 85 is connected in parallel to the seat plate switch 72. This upper limit switch 85 is provided at the lower end of the shutter curtain 1,
When the shutter curtain 1 rises to the upper limit, the lever contacts the upper limit position to close the contact and set the input of the inverter 73 to the "L" level. When the signal from upper limit switch 85 and the obstacle detection signal are not supplied, control unit 76 supplies a pulse signal intermittently at a predetermined cycle to the base of transistor 77. Transistor 77 turns on in response to the pulse signal,
The transistor 78 is turned off, thereby turning the transistor 78 on and off. When the transistor 78 is turned on and off, the light emitting diode 79 blinks and transmits an optical signal. When the seat plate switch 72 detects an obstacle, the control unit 76 does not output a pulse signal to the transistor 77. Therefore, when an obstacle is present at the lower end of the shutter curtain 1, the light emitting diode 79 does not emit a light signal. When the dead battery detection circuit 74 detects that the battery is dead, the control unit 76 gives an "H" level signal to the benzene of the transistor 80 to turn on the transistor 80, turn on the light emitting diode 81, and turn off the battery. Let them know. Next, the configuration of the receiver 5 will be described with reference to FIG. The receiver 5 is provided with a phototransistor 51 for receiving an optical signal emitted from the light emitting diode 79 of the transmitter 7. The phototransistor 51 receives an optical signal emitted from the light emitting diode 79 of the transmitter 7 and supplies the received light output to the control unit 52. The control unit 52 has a lift switch
A stop switch 63 is connected via a down switch 61 and an inverter 54. When the switches 61 and 62 are open and the switch 63 is closed, the power supply voltage + V is applied to the input terminal of the control unit 52 and is set to the “H” level. The control unit 52 controls the motor 3 via the motor drive circuit 53 for normal rotation, reverse rotation, and stop. FIG. 1 is a flowchart for explaining a specific operation of one embodiment of the present invention. In particular, FIG. 1 (a) shows an operation of a transmitter, and FIG. 1 (b) shows a receiver. FIG. 4 is a timing chart of an optical signal transmitted from the transmitter. Next, a specific operation of one embodiment of the present invention will be described with reference to FIGS. First, it is assumed that the shutter curtain 1 is wound around the drum 2 and opened. At this time, when the power is turned on, the shutter curtain 1 starts lowering, the contact of the upper limit switch 85 provided at the lower end of the shutter curtain 1 is opened, and the transmitter 7 starts transmission. That is, the control unit 76 of the transmitter 7 supplies an “H” level signal to the base of the transistor 77 if the respective contacts of the seat plate switch 72 and the upper limit switch 85 are open. Thereby the transistor
77 and 78 conduct, light emitting diode 79 emits light and transmits an optical signal. That is, the light emitting diode 79 transmits predetermined data represented by a pulse code as an optical signal during the period of T1, as shown in FIG. 4 (b). Control unit 76
Changes the signal applied to the transistor 77 to the "L" level after the time T1 shown in FIG. 4 (b) has elapsed. As a result, the transistors 77 and 78 are turned off, and the light emitting diode 79 stops emitting light. The control unit 76 determines whether or not the seat plate switch 72 is on. If it is not turned on, an “H” level signal is transmitted to the base of the transistor 77 again. Repeat this operation,
As long as the seat switch 72 does not detect an obstacle, a pulse signal is applied to the base of the transistor 77. As a result, the light emitting diode 79 flashes and transmits the intermittent optical signal to the receiver 5. On the other hand, the receiver 5 determines whether or not the up switch 61 has been operated. If the up switch 61 has been operated, the motor driving circuit 53 rotates the motor 3 forward. When the motor 3 rotates forward, the drum 2 winds the shutter curtain 1. When the controller 52 determines that the up switch 61 has not been operated, the controller 52 determines whether the down switch 62 has been operated. If the lowering switch 62 is operated, the motor 3 is rotated in the reverse direction, and the shutter curtain 1 wound around the drum 2 is lowered. When determining that the down switch 62 has not been operated, the control unit 52 determines whether the stop switch 63 has been operated. If the stop switch 63 has been operated, the motor 3 is stopped. Further, the control unit 52 controls the
It is determined whether or not an optical signal of predetermined data is received during the first period of time T1 shown in FIG. 4 (b). If the phototransistor 51 has received the data of the optical signal from the transmitter 7, as shown in FIG. 4C at the timing a, the time T longer than the time T1 shown in FIG. Is set to the timer. This timer is configured by program processing. Then, the control unit 52 increments the timer, determines whether or not the time T set by the timer has been measured, and returns to the initial state if the time has not been measured. When the phototransistor 51 receives the data of the optical signal from the transmitter 7 in the first period of the next cycle, the time t
Is set in the timer and retrigger is applied. For example, if the down switch 62 is operated, the controller 52 continues to rotate the motor 3 in the reverse direction. Then, when the seat switch 72 of the receiver 7 detects an obstacle or the upper limit switch 85 is turned on and the optical signal is not transmitted from the transmitter 7, the phototransistor 51 of the receiver 5 is switched to the state shown in FIG. As shown by the dotted line in (b), the optical signal is not received. When determining that the phototransistor 51 has stopped receiving the optical signal, the control unit 52 continues to increment the timer. Then, the control unit 52 determines the time T set by the timer.
Is passed, at the timing c in FIG.
To stop. That is, the transmitter 7 operates when the seat plate switch 72 detects an obstacle or when the upper limit switch
When the switch 85 is turned on, the optical signal is not emitted, and in the receiver 5, the motor 3 is stopped when the phototransistor 51 does not receive the optical signal for the time T set in the timer or more. Therefore, as shown in FIG. 4 (a), in this embodiment, when an obstacle is detected in this embodiment, as shown in FIG. Since the optical signal is not emitted as shown by the dotted line in b), even if light of the same wavelength from outside reaches the receiver 5, the period of the optical signal is the time shown in FIG. 4 (b). The motor 3 does not rotate intermittently unless it is the same as the optical signal sent by the pulse code in T1. In addition, even when the shutter curtain 1 comes into contact with the ground,
When the light emission stops in the same manner as in the case of contact with an obstacle, the shutter curtain 1 stops. When the upper limit shutter curtain 1 is wound, the upper limit switch 85 is turned on and the light emission is stopped, so that the shutter curtain 1 is stopped. Further, in the above-described embodiment, the transmitter 7 emits an optical signal and the receiver 5 receives the optical signal. However, the present invention is not limited to the optical signal, and radio waves and ultrasonic waves may be used. Good. [Effects of the Invention] As described above, according to the present invention, the drive control of the motor is regarded as being performed when the control signal is input from the transmission unit while the switch signal is input from the open / close operation switch, If an obstacle is detected in this opening / closing drive state, the output of the control command from the transmitting means is stopped, whereby the opening / closing operation of the shutter curtain is urgently stopped. Then, the output stop of the control command of the transmitting means is the same as the case of power supply interruption or disturbance, and it is possible to eliminate the possibility that the opening / closing operation is performed with the crystal power supply interruption or disturbance. In addition, the output stop of the control command from the transmission means when the shutter curtain is fully opened and fully closed is performed by detecting the full open and full close of the upper limit position detection means and the obstacle detection means provided on the shutter curtain side. As a result, these detecting means are also used as switches for stopping the output of the control command. Furthermore, since the upper limit position detecting means required when the shutter curtain is in the front open state is provided on the shutter curtain side, the curtain side control unit notifies the curtain side control unit that this has been fully opened as in the case where the shutter curtain is provided on the main body side. It is not necessary to separately provide a means for inputting and stopping the output of the control signal, so that the structure is simplified, maintenance and inspection are facilitated, and the number of parts can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart for explaining a specific operation of one embodiment of the present invention. FIG. 2 is a block diagram of a transmitter included in one embodiment of the present invention. FIG. 3 is a block diagram of the receiver. FIG. 4 is a waveform diagram showing a signal transmitted from the transmitter. FIG. 5 is a diagram showing an outline of a conventional electric shutter device. In the figure, 1 is a shutter curtain, 2 is a drum, 3 is a motor, 5 is a receiver, 7 is a transmitter, 51 is a phototransistor, 52 is a control unit, 53 is a motor drive circuit, 61 is an up switch, and 62 is down Switch, 63 is a stop switch, 72 is a seat switch, 76 is a control unit, 77, 78, 80 are transistors, 79, 8
1 indicates a light emitting diode.

Continuation of front page    (72) Inventor Hideaki Hamoto               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated (72) Inventor Yuji Toi               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated (72) Inventor Kimio Nakagawa               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated (72) Inventor Tatsuo Yoshikawa               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated (72) Inventor Noriyama Yamanaka               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated (72) Inventor Takayuki Miki               22-22 Nagaikecho, Abeno-ku, Osaka               Incorporated                (56) References Japanese Utility Model Application No. 59-49479 (Japanese Utility Model Application               161298) and the specification attached to the application               Microfilm of the contents of the drawing               (JP, U)                 Japanese Utility Model Application No. 59-50005 (Japanese Utility Model Application Showa 60-               182496) and the specification attached to the application               Microfilm of the contents of the drawing               (JP, U)

Claims (1)

(57) [Claims] An electric shutter device that controls driving of a motor for opening and closing the shutter curtain based on a control command from a motor-side control unit to which a control signal from a transmission unit provided on the shutter curtain side is input. In the above, when the motor-side control unit has an opening / closing operation switch for instructing opening / closing of the shutter, a switch signal input from the opening / closing operation switch, and a predetermined data input from the transmission unit, Timer means to be set, and a motor drive control mechanism that drives the motor until the timer means measures a predetermined time, and stops driving the motor in response to measuring the predetermined time, At the lower end of the shutter curtain, an obstacle detecting means for detecting an obstacle, and the shutter curtain is fully opened. The output of the upper limit position detecting means for detecting that the obstacle has been detected, the obstacle detecting means, the upper limit position detecting means, and the output of the transmitting means are connected. And a curtain-side control unit set to stop when there is an input of an electric shutter.