JPH01187284A - Motor-driven opening and closing device for vertically movable door - Google Patents

Abstract

PURPOSE:To raise safety of a motor-driven opening and closing device by a method in which a normal act ion signal is sent out at a fixed time interval during a self-normal action period for an abnormally sensor, and when a controller does not receive the signal in a fixed time period during the opening end closing period, the motor is stopped. CONSTITUTION:An anomaly sensor 10 is provided to a motor-driven shutter or blind set on the entrance or window of a building to detect abnormally, e.g., presence of foreign matter, etc., and a motor 6 is controllably stopped by e controller 1. From the sensor 10, normal action signal is sent out at a fixed time interval during the self normal action period. In case where the normal action signal from the sensor 10 is non received during the opening and closing action for a fixed time period, the motor 6 is controllably stopped until the signal can be received. The occurrence of trouble with opening and closing due to disorder of battery in the sensor 10 without confirmation of safety can thus be avoided.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric opening/closing device for a vertically movable opening/closing body such as an electric shutter or an electric blind, and in particular, the electric opening/closing device for a vertically movable opening/closing body with improved safety. It is related to.

[Prior art] In vertically movable opening/closing equipment such as electric shutters and electric blinds installed at building entrances and windows, foreign objects are caught between the end of the vertically movable opening/closing body such as the shutter or blind and the floor or threshold. If the vertically movable opening/closing body is operated with these parts in place, the vertically movable opening/closing body may be deformed or damaged, and if a person is caught in the body, it may lead to serious personal injury. Pressure sensors and pressure switches are placed in contact areas such as floors and thresholds, and an abnormality detection device is installed to detect abnormalities in response to the output of these pressure sensors and pressure switches. If the motor is caught, the abnormality is detected based on the operational outputs of these pressure sensors and pressure switches, and the power to the motor is cut off to stop the opening/closing operation. However, in such vertically movable opening/closing body equipment, when considering the shutter, the driving device side of the vertically movable opening/closing body equipment is located on the side of the lintel near the ceiling, and the abnormality detection device is included in the cost price. When installing shutters on a building, there are problems with waterproofing on the floor, and it is not recommended for safety reasons to power the abnormality detection device from a commercial power source, as there is a risk of electrical leakage or electric shock. , a battery is used as a power source for the abnormality detection device. An infrared transmitter is installed at the bottom of the guide rail of the shutter, and an infrared detector is placed at the upper side of the guide rail to output the output signal of the abnormality detection device. It was also sending a low battery signal to the abnormality detection device. Here, the dead battery signal is a signal generated when the battery voltage of the abnormality detection device decreases, and the foreign object entrapment signal is a signal generated when the pressure sensor or pressure switch is operated. Then, in response to these signals, a safety function is activated on the driving device side of the vertically movable opening/closing body device, and the driving of the shutter is stopped.

[Problems to be Solved by the Invention] As described above, in a vertically movable opening/closing device such as a shutter, the driving device side thereof is on the ceiling side, and the abnormality detection device is included in the cost price. When installing shutters on buildings, etc., there are problems with waterproofing on the floor, and it is not desirable for safety to use commercial power as the power source for the abnormality detection device. use The output signal of the abnormality detection device is provided by an infrared transmitter installed at the bottom of the guide rail of the shutter, and an infrared detector placed opposite to this at the upper side of the guide rail to detect foreign objects caught in the infrared signal. It was sending a signal and a low battery signal for the abnormality detection device. Then, in response to these signals, a safety function is activated on the driving device side of the vertically movable opening/closing body device, and the drive of the shutter is stopped.

However, the dead battery signal is a signal that is emitted only when the battery voltage of the abnormality detection device drops, so if the battery voltage drops until the abnormality detection device becomes inoperable, a signal indicating that the battery is dead is output. Can not. Furthermore, if the abnormality detection device is unable to transmit these signals for some reason, the control section of the power supply switching device cannot detect the abnormality. Therefore, even if a foreign object is caught, the shutter cannot be stopped.

Therefore, the purpose of this invention is that when a foreign object is caught in the lower end of the vertically movable opening/closing body, the motor is always turned off and the operation is stopped, and the abnormality detection device runs out of battery and becomes inoperable. Even if the abnormality detection device function does not work properly due to the failure of the signal transmission due to the interruption of the optical path of the infrared signal, the vertically movable opening/closing body continues to operate with the foreign object trapped. It is an object of the present invention to provide an electric opening/closing device for a vertically movable opening/closing body that can avoid dangerous operations and improve safety.

[Means for Solving the Problems] In order to achieve the above object, the present invention is configured as follows. That is, a control means is provided to control the opening/closing drive of the vertically movable opening/closing body by transmitting the driving force of the motor, and to stop the drive of the motor when receiving a pinch signal. In an electric opening/closing device for a vertically movable opening/closing body, the electric opening/closing device includes a detection means that operates in response to pressure, and a battery-powered abnormality detection means that generates a pinch signal in response to the detection output of the detection means. The means is provided with means for generating a normal operation signal at fixed time intervals during its normal operation period, and the control means is configured to generate a normal operation signal when the normal operation signal cannot be received for a fixed period of time during the opening/closing operation. It is configured to include a functional means for controlling the motor to stop until it is received.

[Function] In this device having the above configuration, when a pinch is detected, the abnormality detection means outputs a pinch signal, and during the normal operation period of the device,
Generates a normal operation signal at regular time intervals. In addition, the control means for controlling the opening/closing drive of the vertically movable opening/closing body controls the motor to stop if it receives a pinch signal during opening/closing operation, and also receives a normal operation signal when it cannot receive a normal operation signal for a certain period of time. The motor operates to control the motor stop until the motor stops.

Therefore, according to the present invention, when a foreign object is caught in the lower end of the vertically movable opening/closing body, the power to the motor can be turned off and the operation can be stopped without fail, and the abnormality detection means can become inoperable due to a dead battery. This avoids the dangerous operation of continuing to drive the vertically movable opening/closing body with a foreign object caught even if the signal transmission from the abnormality detection means becomes impossible and the abnormality detection function does not work properly. become able to do.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the circuit configuration of this device,
FIG. 2 is a diagram showing the overall configuration of this device.

In the figure, reference numeral 1 denotes a control unit that controls opening and closing of a vertically movable opening/closing body, for example, a shutter. The control section 1 uses, for example, a microprocessor as a control center, and is composed of an input interface, a power supply circuit, a motor power supply switching circuit, and the like. 2 is an outlet plug cord for connecting the control unit 1 to a commercial power source. 3 is an open switch for opening the vertically movable opening/closing body, and 4 is a closing switch for closing the vertically movable opening/closing body. Further, 5 is a stop switch for stopping the opening/closing operation of the vertically movable opening/closing body. These switches 3, 4.5 are manually operated switches, and are installed, for example, on a wall. Reference numeral 6 denotes a motor for driving the vertically movable opening/closing body 20, which receives power from the control section 1 via a limit switch 7.8 and is driven to rotate. Limit switch 7゜8
is a switch that is provided at a limit position for winding and unwinding the vertically movable opening/closing body 20, and operates to cut off the circuit when the limit position is reached. One of the limit switches 7.8 is provided in the forward drive circuit, and the other is provided in the reverse drive circuit. 9 transmits the infrared signal from the abnormality detection device 10 to the control unit 1
This infrared light receiving part 9 is a guide rail 21a that guides the vertically movable opening/closing body 20,
21b, for example, on the upper side within the guide rail 21a. Note that the guide rail 21a is installed by being buried in a wall or a pillar. Further, the abnormality detection device 10 is provided on the lower end side within the guide rail 21a.

11 is a battery that serves as a power source for the abnormality detection device 10;
is an infrared light emitting section of the abnormality detection device 10. This infrared light emitting section 12 is also provided on the lower end side of the guide rail 21a, and is disposed opposite to the infrared light receiving section 9. 13 is a pressure switch of the abnormality detection device 10, and the vertical movement opening/closing body 2
It will be laid on the floor where 0 will come down.

The abnormality detection device 10 also uses a microprocessor as a control center, and this abnormality detection device 10 has a pressure switch 1.
3 generates a pinch signal when activated, a dead battery signal when the battery voltage becomes low, and a normal operation signal at predetermined time intervals during normal operation. These signals are transmitted as infrared signals by the infrared emitter 12, which are received by the infrared receiver 9, and if the received signals are normal operation signals, the control unit 1 switches the open switch 3. According to the operation of the close switch 4, drive power is supplied to the drive circuits on the forward and reverse rotation sides, and the motor 6 is rotated in the forward and reverse directions to open and close the vertical movement opening/closing body 20, and when the limit switch 7.8 is operated. I do. Also,
If the signal received by the infrared receiver 9 is a pinch signal, the control unit 1 immediately turns off the drive power and stops the opening and closing operations.
Also, when a low battery signal is received, the drive power is immediately turned off and restarted.

The closing operation is stopped, and if the normal operation signal is not received, the normal operation signal is received after an appropriate predetermined time period determined according to the repetition period of the normal operation signal is received.
It has a control function of controlling the cutoff of the drive power supply path for the motor 6. Although these functions are realized by software, they can also be configured by hardware.

The operation of this device having such a configuration will be explained. Here, FIG. 3 shows an operation flowchart of the abnormality detection device 10, and FIG. 4 shows an operation flowchart of the control section 1.

As shown in FIG. 3, the abnormality detection device 10 generates a pinch signal (SL, SO) when the pressure switch 13 is turned on, and generates a dead battery signal in the form of an infrared signal when the battery voltage decreases (S2). .87). In addition, if the device is in normal operation, a normal operation signal indicating normal operation is transmitted at regular intervals in the form of an infrared signal (S3 34, 35).

On the other hand, in the control section 1, as shown in FIG.

By operating the close switch 3.4, the motor 6 is supplied with power to the forward or reverse rotation drive circuit to open and close the shutter (8
11, Si2. Si2. 820). Furthermore, if the stop switch 5 is pressed, the power supply is stopped and the motor 6 is stopped (521a, 521). At the same time, the signal from the abnormality detection device 10 is constantly monitored, and if a pinching signal is received, the power supply to the motor 6 is stopped.813. 3
22) If the device waits for the next operation and receives a dead battery signal, stop supplying power to the motor 6.S14.
523), the device waits until this signal stops due to battery replacement, and enters the state of waiting for the next operation. That is, when the battery is replaced and the abnormality detection device 10 returns to a normal operating state, a normal operating signal is sent again. When this normal operating signal is received, the internal timer is reset and the above-mentioned control is carried out. be done (815. 524
).

During normal operation, a normal operation signal is transmitted at regular time intervals, and upon reception of this normal operation signal, the internal timer is reset and the above-mentioned control is implemented (315.824). This starts the internal timer and implements the above control (815.524)
.

If the normal operation signal is not received even after a certain period of time has passed due to battery consumption, the internal timer will time up and the power supply to the motor 6 will be stopped due to this time up.
The vertical movement opening/closing body (shutter) 20 is not opened/closed until a normal operation signal is received (81B, S1
7. 518).

In this way, this device generates a jamming signal when the abnormality detection device detects jamming, and also generates a normal operation signal at fixed time intervals during the normal operation period of the device, and also generates a normal operation signal when the device detects a jamming. In addition, if the control unit that controls the opening/closing drive of the vertically movable opening/closing body receives a pinch signal or a dead battery signal during the opening/closing operation, it will generate a dead battery signal and control the motor to stop for a certain period of time. When the normal operation signal cannot be received, the motor is provided with a function to stop the motor until the normal operation signal is received. Therefore, (1) Even if the battery becomes extremely low and the abnormality detection device 10 stops functioning, the normal operation signal will not be received at this time, so the opening/closing operation of the vertically movable opening/closing body (shutter) will continue. disappears.

(2) Even if the abnormality detection device fails or the infrared signal is blocked by dust or the like and cannot be transmitted, the normal operation signal cannot be received, so the vertically movable opening/closing body will not be opened or closed.

Therefore, when a vertically movable opening/closing body is pinched by a foreign object, the motor is always turned off and the operation is stopped, and the abnormality detection device may run out of battery and become inoperable, or the optical path of the infrared signal may be interrupted, causing the signal to fail. Even if a stop command cannot be sent or received when transmission becomes impossible, foreign objects may remain trapped.
Dangerous operations such as continuous opening and closing operations can be avoided.

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope of the gist thereof. For example, in addition to infrared signals, radio waves may be used, or signals may be used. It is also possible to transmit signals by wire using wires, and in addition to shutters and blinds,
It can also be used to control automatic doors.

[Effects of the Invention] As described in detail above, according to the present invention, when a foreign object is caught in the lower end of the vertically movable opening/closing body, the motor is always powered off and the operation is stopped, and the abnormality detection device is activated. When the battery becomes inoperable due to a dead battery, or when the optical path of the infrared signal is interrupted and signal transmission becomes impossible, the device will continue to open and close with a foreign object trapped in it even if it is no longer able to send or receive a stop command. It is possible to provide an electric opening/closing device for a vertically movable opening/closing body that can avoid dangerous situations and dramatically improve safety.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a circuit configuration showing an embodiment of the present invention, Fig. 2 is a diagram showing a schematic structure of the device, Fig. 3 is an operation flowchart of the abnormality detection device, and Fig. 4 is a control unit. The operation flowchart is shown below. 1...Control unit, 2...Outlet plug cord, 3
... Open switch for vertically moving opening/closing body, 4... Closing switch for vertically moving opening/closing body, 5... Stop switch, 6... Drive motor, 7, 8... Limit switch, 9... - Infrared light receiving section, 10... Abnormality detection device, 11... Battery, 12... Infrared light emitting section, 13... Pressure switch,
20... Vertical movement opening/closing body, 2La, 21b... Guide rail. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (1)

[Claims] A control means is provided to control the opening/closing drive of the vertically movable opening/closing body by transmitting the driving force of the motor, and to stop the drive of the motor upon receiving a pinch signal, and also to apply pressure to the drop point area of the lower end of the vertically movable opening/closing body. In the electric switching device for a vertically movable opening/closing body, the vertically movable opening/closing body electric opening/closing device is provided with a detecting means that operates in response to the detected signal, and a battery-powered abnormality detecting means that generates a pinch signal in response to the detection output of the detecting means. is provided with a means for generating a normal operation signal at fixed time intervals during its own normal operation period, and the control means receives a normal operation signal when the normal operation signal cannot be received for a fixed period of time during the opening/closing operation. 1. An electric opening/closing device for a vertically movable opening/closing body, characterized in that it is configured with a functional means for controlling the stop of a motor.