JP2536637Y2 - Safety device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a safety device for an electric shutter mounted on an opening of a building.

[Problems to be solved by the prior art and the invention] Generally, as a safety device of this kind of electric shutter,
A seat plate switch, which is operated by detecting contact with an obstacle, on the seat plate portion at the lower end of the shutter curtain, and a detection signal such as infrared light is transmitted to a receiver on the shutter case side based on the detection of the seat plate switch. 2. Description of the Related Art There is known a device provided with a receiver for transmitting. In such a case, the lowering operation of the shutter curtain is urgently stopped based on the reception of the obstacle detection signal, but it is preferable to automatically lower the shutter curtain after removing the obstacle in consideration of operability. Therefore, in the related art, the transmitter is configured to continuously (or intermittently) transmit a detection signal in the obstacle detection state. On the receiving side, the obstacle is removed when the continuous signal is interrupted. It has been proposed to determine that the shutter curtain has been lowered and to lower the shutter curtain again. However, in this case, since the transmitter operates continuously in the obstacle detection state, the battery, which is the power supply of the receiver, is drastically consumed, and as a result, frequent replacement of the battery is required, and the maintainability becomes a problem. I'm sorry.

[Means for Solving the Problems] The present invention was created with the object of providing a safety device for an electric shutter capable of eliminating these drawbacks in view of the above-mentioned circumstances. On the curtain side, an obstacle detection switch for detecting an obstacle, and a transmitter for transmitting an obstacle detection signal to a receiver on the opening and closing control mechanism side in accordance with the detection operation of the obstacle detection switch, In the electric shutter, wherein the opening / closing control mechanism is provided with emergency stop control means for urgently stopping the lowering operation of the shutter curtain based on signal reception of the receiver, the transmitter detects an obstacle detection operation of an obstacle detection switch. An obstacle removal signal transmitting means for transmitting an obstacle removal signal based on switching from the state to the non-detection state is provided. And a re-lowering control means for re-lowering the shutter curtain which has been stopped urgently on the basis of the above.

According to the present invention, the use of this mechanism makes it possible to suppress the consumption of the battery, which is the power source of the transmitter, as much as possible and to improve the maintainability.

[Example] Next, an example of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter curtain of an electric shutter. The shutter curtain 1 has a storage posture wound around a shutter case 4 by driving an electric motor 3 in accordance with an operation of an open / close push button switch 2. The upper and lower portions are vertically moved so as to change to a closed posture hanging down along the guide rails 5 erected on the left and right sides of the opening, however, these basic configurations are conventional.

Reference numeral 6 denotes a seat plate provided at a lower end portion of the shutter curtain 1. The seat plate 6 has a seat plate switch 7 which detects and operates by contact with an obstacle, and a detecting operation of the seat plate switch 7. And a transmitter 8 for transmitting an infrared signal based on the detection signal. The detection signal generated by the transmitter 8 is transmitted to a control unit 10 described later via a receiver 9 provided on the shutter case 4 side. Is to be entered.

Further, reference numeral 11 denotes an operation circuit of the transmitter 8. The operation circuit 11 uses a battery 12 as a power supply, and a transmission control circuit 13 connected to the seat switch 7 detects an obstacle of the seat switch 7. A predetermined signal (long and short,
The light emitting diode LED is configured to emit light by outputting an intermittent or the like. The transmission control circuit 13 also detects the obstacle even when the seat plate switch 7 is switched from ON to OFF. A signal having a different pattern from the signal is output. That is, the transmitter 8
Are configured to perform signal transmission based on the obstacle detection operation (OFF → ON) of the seat panel switch 7 and signal transmission based on the obstacle removal detection operation (ON → OFF) of the seat panel switch 7.

On the other hand, the control unit 10 is configured using a so-called microcomputer or the like, which receives signals from the open / close push button switch 2, the receiver 9, the limit switches LSU, LSD, etc. An operation signal is output to the motor drive circuit 14, the alarm buzzer 15 and the like based on the determination based on the input signal.

Here, the control procedure of the control unit 10 will be described with reference to the flowcharts shown in FIGS. The control unit 10
In this case, it is determined whether any one of the up, down, and stop switches of the open / close push button switch 2 has been operated. Based on the determination, the forward / reverse and stop operations of the electric motor 3 are performed, and Limit switch LSU, LSD
When the obstacle detection signal of the transmitter 8 is input, the emergency stop control as a subroutine is executed. In the emergency stop control, the electric motor 3
The timer T is set following the stop operation of, but if the timer T has not elapsed, it is continuously determined whether or not the obstacle removal signal of the transmitter 8 has been input. If it is determined that the shutter curtain 1 has been stopped urgently, the electric motor 3 is driven to rotate forward after the predetermined time t has elapsed, and the shutter curtain 1 is lowered again. On the other hand, when the timer T elapses without inputting the obstacle removal signal, the electric motor 3 is immediately driven in reverse to retreat and raise the shutter curtain 1.

In the embodiment of the present invention constructed as described above, when the shutter switch 1 is lowered by operating the open / close push button switch 2, when the seat plate switch 7 detects and operates by contact with an obstacle, the transmitter 8 The emergency stop of the shutter curtain 1 is performed based on the obstacle detection signal transmitted from the vehicle. However, when the obstacle is removed within a predetermined time, the switch of the seat plate switch 7 is switched from ON to OFF. Transmitter 8 transmits an obstacle removal signal based on the
When the control unit 10 receives the obstacle removal signal, the electric motor 3 is driven to rotate forward to lower the shutter curtain 1 again.

As described above, according to the present invention, the descent operation of the shutter curtain 1 is urgently stopped based on the obstacle detection, and when the obstacle is removed, the shutter curtain 1 is stopped.
Is lowered while the transmitter 8
In the obstacle detection state, the transmission of the obstacle detection signal accompanying the obstacle detection and the transmission of the obstacle removal signal accompanying the obstacle removal are performed twice without transmitting the obstacle detection signal continuously or intermittently. Will be transmitted only. Therefore,
A battery which is a power source of the transmitter 8 like a device which continuously or intermittently transmits an obstacle detection signal in an obstacle detection state.
As a result, it is possible to reliably prevent the battery 12 from being drastically consumed. As a result, the number of times of battery replacement can be reduced as much as possible, and the maintainability can be significantly improved.

In the present invention, the seat switch 7 can also be used as a security device by issuing an alarm based on the reception of an obstacle removal signal (return signal for the seat switch) in the fully closed stop state. .

In addition, when an obstacle removal signal is received immediately after the obstacle detection signal, it is determined that the object is naughty or careless, and an alarm is issued. On the other hand, if the obstacle is not removed, the safety can be improved by issuing an alarm until the shutter curtain 1 is raised by operating the push button switch 2.

Further, a failure diagnosis mechanism for determining that the seat switch 7 is faulty when the seat curtain switch return signal is not received even if the shutter curtain 1 which has been emergency stopped based on obstacle detection retreats and rises is added. be able to.

The present invention is, of course, not limited to the above-described embodiment. For example, the obstacle removal signal transmitted by the transmitter is not necessarily different from the obstacle detection signal. It may be a signal.

[Effects] In summary, since the present invention is configured as described above, it is configured to urgently stop the lowering operation of the shutter curtain based on the obstacle detection signal transmitted from the transmitter. However, the transmitter does not continuously or intermittently transmit the obstacle detection signal in the obstacle detection state, and transmits the obstacle detection signal accompanying the obstacle detection,
Only the transmission of the obstacle removal signal accompanying the obstacle removal is performed twice, and the shutter curtain is lowered again with the transmission of the obstacle removal signal. Accordingly, it is possible to reliably prevent the battery serving as the power source of the transmitter from being drastically consumed as in the case of continuously or intermittently transmitting the obstacle detection signal in the obstacle detection state. Can be reduced as much as possible, and maintainability can be significantly improved.

[Brief description of the drawings]

The drawings show an embodiment of the safety device of the electric shutter according to the present invention. FIG. 1 is a front view of the electric shutter, FIG. 2 is a circuit diagram showing an operation circuit of the transmitter, and FIG. 4 is a block diagram of the opening / closing control mechanism, FIG. 4 is a flowchart showing a main routine, FIG. 5 is a flowchart showing an emergency stop control, and FIG. 6 is a timing chart showing an operation. In the drawing, 1 is a shutter curtain, 3 is an electric motor, 7 is a seat switch, 8 is a transmitter, 9 is a receiver, and 10 is a control unit.

Claims (1)

(57) [Scope of request for utility model registration] An obstacle detection switch for detecting an obstacle and an obstacle detection signal are transmitted to a receiver on an opening and closing control mechanism side in accordance with the detection operation of the obstacle detection switch to the shutter curtain side. A transmitter, wherein the opening / closing control mechanism is provided with emergency stop control means for urgently stopping the lowering operation of the shutter curtain based on a signal received by the receiver. Obstacle removal signal transmission means for transmitting an obstacle removal signal based on the switching of the detection switch from the obstacle detection operation state to the non-detection state is provided, while the opening / closing control mechanism includes an obstacle removal signal based on the reception of the obstacle removal signal. A safety device for an electric shutter provided with re-lowering control means for re-lowering a shutter curtain that has been emergency stopped.