JPH0340797B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shutter opening/closing control device, and more particularly to a shutter opening/closing control device that can ensure safety when the shutter is lowered and has a crime prevention function.

(Prior art) An opening/closing control device was developed in the 1970s in which, when a shutter hits an obstacle such as a load or a person while descending, the shutter stops, rises to a predetermined height, and then descends again until the obstacle disappears. -Disclosed in Publication No. 25745. Also, in Utility Model Publication No. 56-38157,
An opening/closing control device has been disclosed which repeats the operation of once stopping, rising to a predetermined height, and then lowering again when it hits an obstacle, and after a certain period of time has elapsed, this repeating operation is stopped and an alarm is issued.

(Problem to be solved by the invention) However, although these opening/closing control devices can ensure safety in the event that the shutter hits an obstacle while lowering, once the shutter is closed, the operation of the control device cannot be completed. Because the shutter is stopped, even though there is a detector installed at the bottom of the shutter, there is no way to know if the shutter is forced open, and there is no security function at all. Also, in the publication of Special Publication No. 54-25745,
If there is an obstacle, the elevator will have to go up and down many times, but the drive motor for opening and closing the shutter is not designed to operate continuously for long periods of time, so there is a risk that it will burn out. Furthermore, if you leave the obstacle detector activated while the shutter is lowering, the shutter will open one after another, so in unattended operation, if you operate the obstacle detector before the shutter is completely closed, the shutter will open automatically. The shutter can remain open for a considerable period of time until the motor confirms that it is not closed and comes to the scene to investigate, and a crime may be committed during that time. Furthermore, in the case of Utility Model Publication No. 56-38157, the alarm is always emitted after a certain period of time has passed after receiving the signal from the detector, unless the shutter is closed, so the time setting is short. If the detector is activated when the shutter begins to close, or if the detector activates several times at intervals, the alarm will be issued at unnecessary times as time elapses before the shutter closes. Furthermore, if the time is set too long, the shutter will rise and fall many times, and there is a risk that a crime may be committed or the drive motor may burn out during that time.

(Means for solving the problems) In order to solve the conventional problems, the present invention has the following features:
A control device that receives a detection signal from an obstacle detector at the bottom of the shutter and a shutter closed position signal to control a shutter stop circuit, ascent circuit, descending circuit, and alarm circuit, and stops the rising detection signal of the detection signal. The first timer is connected to the rising circuit through the first comparator, and the time-up signal of the first timer is input to the stop circuit and the second comparator. A second comparator is connected to the descending circuit, a second timer that operates according to the output of the detection signal and a counter that detects the number of time-ups of the first timer are connected to the third comparator, and the third comparator is connected to the third comparator. The comparator is connected to the alarm circuit and the first and second comparators, and when the signal from the third comparator is input to the first and second comparators, the comparator is connected to the rising circuit and the falling circuit. Furthermore, a closed position detector is connected to the second comparator so that the signal from this detector is not outputted to the second comparator.
To provide a shutter opening/closing control device configured not to output a signal to a descending circuit when input to a comparator.

(Function) According to this configuration, when the detection signal is output while the shutter is lowering, the stop circuit is activated and once the shutter is stopped, the raising circuit is activated and raised for a predetermined time by the first timer, and the shutter is raised by the first timer. When the time is up, it stops rising and then falls, and when the detection signal is output again, the same operation is repeated. When this operation is repeated more than the number of times set by the counter within the set time of the second timer, the third comparator is activated and an alarm is issued by the alarm circuit, and the first and second comparators are activated. The output to the ascending circuit and descending circuit is stopped, and the shutter is stopped. On the other hand, if the detection signal is not output or if the detection signal is not output before the number of times set in the counter is reached, the shutter continues to descend. When the shutter reaches the closed position, the signal activates the second comparator and stops the output to the descending circuit, so if a detection signal is output at the closed position, it will stop once and then rise and be detected. Stops when no signal is output. If you insert something into the lower end of the shutter and try to pry it open in this closed state, the shutter will repeatedly go up and down in a small range, then stop and issue an alarm. Furthermore, if the obstacle detector is left in operation, the rising edge detection signal of the detection signal is output only once, so the obstacle detector continues to descend after rising once.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 2, reference numeral 1 denotes a shutter in which a large number of slats are connected.A drainer 2 that comes into contact with the floor is attached to the lower end of the shutter. It is configured to be driven up and down. The drive motor 5 is controlled by a control panel 6 to raise, lower, and stop the shutter 1 as appropriate. Reference numeral 7 denotes an obstacle detector placed at the lower end of the shutter 1, and its detection signal is transmitted by a transmitter 8 via radio waves or infrared rays to a receiver 9 placed on the upper fixed side, and the received signal is sent to the control panel. 6 is input.

As shown in FIG. 3, the obstacle detector 7 has a holding case 10 that holds a movable member 11 movable up and down attached to the lower surface of the drainer 2, and a variable resistor 12 arranged inside this holding case 10. The variable resistance lever 12a is interlocked with the movable member 11 via a sliding rod 13. A constant voltage is applied between the fixed terminals of the variable resistor 12 by a power supply 14, the movable terminal is connected to one input terminal of a comparator 15, and the other input terminal of the comparator 15 is connected to a reference voltage. as said power supply 14
A voltage obtained by dividing the voltage by resistors 16 and 17 is applied. Therefore, when the movable member 11 rises, the movable terminal of the variable resistor 12 slides, and its output voltage becomes higher than the reference voltage, a signal is output from the comparator 15, and the inverter gate 1
8 as a detection signal S, and this detection signal S is input to the control panel 6 via a transmitter 8 and a receiver 9.

As shown in FIG. 1, the control panel 6 includes a control circuit that controls a stop circuit 21 for stopping the shutter 1, a raising circuit 22, and a lowering circuit 23 for lowering the shutter 1 based on the detection signal S. This control circuit is configured to receive a signal from a closed position detector 24 which issues a signal when the shutter 1 reaches the closed position.

The detection signal S is shaped into a rectangular wave by a waveform shaping circuit 25, and detected by a rising edge detection circuit 26 to output a pulse signal. This pulse signal is input to the stop circuit 21 via the amplifier 27.
Further, the pulse signal is inputted to a first timer 29 via a delay circuit 28, and when this first timer 29 is activated, the signal being activated is transmitted to an amplifier 30.
and is input to the rising circuit 22 via the first comparator 31. The time-up signal of the first timer 29 is input to the downlink circuit 23 via a delay circuit 32, an amplifier 33, and a second comparator 34.
Further, this time-up signal is transmitted to the amplifier 27 connected to the stop circuit 21 and the first counter 3.
5 is input.

The output of the waveform shaping circuit 25 is a second, third,
It is input to fourth timers 36, 37, 38, second counter 39 and fourth comparator 41.
The second timer 36 is activated by the output from the waveform shaping circuit 25, and outputs a time-up signal to the third comparator 40 when a predetermined period of time, such as 5 seconds, has elapsed. In addition, the first counter 35
is configured to output a signal to the third comparator 40 when the time-up signal of the first timer 29 is output, for example, three times. Third comparator 40
When a signal is input from both the second timer 36 and the first counter 35, it outputs a signal, and the signal is sent to the alarm circuit 44 and the first and second comparators 31 and 34 via the amplifier 43. is input.
The first comparator 31 is configured not to output a signal to the rising circuit 22 when the signal from the amplifier 43 is input, and the second comparator 34 is configured to output the signal from the amplifier 43.
3 or a signal from the closed position detector 24 is input, the lowering circuit 23 is configured not to output a signal.

The third timer 37 is activated by the output from the waveform shaping circuit 25, and is configured to output a time-up signal to the fourth comparator 41 when a predetermined period of time, such as eight seconds, has elapsed. When the time-up signal and the output from the waveform shaping circuit 25 are input, the amplifier 41 outputs a signal to the amplifier 43.

Further, the fourth timer 38 is connected to the waveform shaping circuit 2.
The second counter 39 is activated by the output from the waveform shaping circuit 25, and is configured to output a time-up signal to the fifth comparator 42 when a predetermined time such as 10 seconds has elapsed, and the second counter 39 receives the output signal from the waveform shaping circuit 25. When the number of times is counted, for example, five times, a signal is output to the fifth comparator 42, and when both signals are input, the fifth comparator outputs a signal to the amplifier 43.

In the above configuration, in the normal state, the descending circuit 2
When shutter 1 is closed by activating shutter 1, no detection signal is output during its descent, so it continues to descend and when it reaches the closed position, detector 7 is activated and a detection signal S is output and the shutter is closed. The position sensor 24 outputs a closed position signal. Then, the stop circuit 21 is activated and stopped based on the detection signal S, and then increases by the operating time of the first timer 29 and stops at a position where the detection signal S is not output. comparator 3
Since the output from 4 is stopped, the descending circuit 23
does not operate and remains closed.

In this closed state, when a crowbar or the like is inserted into the lower end of the shutter 1 to try to pry it open, a detection signal S is output, the shutter 1 rises once, then descends and stops. For example, if you repeat this action three times or more in 5 seconds,
Signals are input from the second timer 36 and the first counter 35 to the third comparator 40, the alarm circuit 44 is activated, and the first and second comparators 31, 34
From then on, the output to the raising and lowering circuits 22 and 23 is stopped, and the shutter 1 is stopped and locked.

Also, if the crowbar is inserted and moved as the shutter 1 rises, the detection signal S will be output continuously, and if it rises and falls only once and stops, no signal will be output from the rise detection circuit 26 after that. If the motor remains stopped and this state continues, for example, for eight seconds or more, a signal is output from the fourth comparator 41, the alarm circuit 44 is activated, and the motor is locked in the stopped state.

Also, if you try to pry open shutter 1 by inserting the crowbar 5 or more times (for example, within 10 seconds) at longer intervals than the above-mentioned 3 times in 5 seconds, the crowbar A signal is output from the comparator 42 of No. 5, and the alarm circuit 44 is also activated and locked in the stopped state.

Furthermore, even if you insert a crowbar and try to pry open shutter 1 under conditions other than these, unless the detection signal is output at least 3 times in 5 seconds, shutter 1 will open because the descending distance is greater than the ascending distance. It is completely impossible to open shutter 1 one after another. Therefore, the fourth
And the fifth comparators 41 and 42 do not necessarily need to be provided. Further, the outputs of these comparators 41 and 42 may be inputted only to the alarm circuit 44.

On the other hand, when the shutter 1 comes into contact with an obstacle while descending, the detection signal S is output, and the rising detection pulse activates the stop circuit 21 to temporarily stop the shutter. The raising circuit 22 is operated for the operating time of the timer 29, and the shutter 1 is raised a predetermined distance and then stopped.Then, the delay circuit 32 again operates the lowering circuit 23 after a short time, and the shutter 1 is lowered. If there are no obstacles during this time, it will continue descending.

If an obstacle still exists, the detection signal S is output again and the upper operation is repeated. When this operation is repeated, for example, three times or more (within 5 seconds), a signal is output from the third comparator 40 in the same way as above, the alarm circuit 44 is activated, and the rising and falling circuits 22 and 23 are activated. Operation is stopped and locked in the stopped state.

Furthermore, even if you try to open the shutter 1 one after another by pushing up the detector 7 while the shutter 1 is falling, if the detection signal S continues to be output, the rising detection pulse will not be output, so the shutter will continue to fall after rising once. If this state is maintained for, for example, 8 seconds or more, the alarm circuit 44 will be activated and stopped. Furthermore, in other cases as well, it is impossible for the shutter 1 to open one after another, as in the case where an attempt is made to open the shutter 1 by force.

(Effects of the Invention) According to the shutter opening/closing control device of the present invention, as is clear from the above explanation, when the shutter hits an obstacle while descending, it immediately stops and rises, resulting in high safety. And since the obstacle can be easily removed and the shutter continues to descend,
It is very convenient compared to a device that stops all at once, and if the obstacle is not removed, the above operation will be repeated, and if this operation is repeated a predetermined number of times, it will issue an alarm and stop. It becomes immediately clear that the drive motor is not working properly, and countermeasures can be taken immediately, and burnout and energy loss due to repeated forward and reverse rotation of the drive motor can be avoided. Moreover, it is stopped by the rising detection pulse signal of the detection signal,
Since the first timer raises the shutter for a predetermined time and then lowers it, even if the detector remains activated, once it has risen, it will continue to descend, making it possible to open the shutter one after another. Furthermore, if the detection signal is output more than a predetermined number of times within a predetermined time, an alarm will be issued and the device will stop, and if the detection signal is output less than a predetermined number of times within a predetermined time, The shutter is closed successively as the descending distance becomes longer than the ascending distance, and since it is impossible to leave the shutter open in any case, it is highly effective in terms of crime prevention.
In addition, even when there is no obstacle, the obstacle detector is activated when the blockage position is reached, but in that case, the activation of the detector causes the first timer to be slightly increased by the activation time. The shutter can be stopped in the closed state and maintained in the closed state using the closed position signal, and even if you try to pry the shutter open from this closed state, the shutter will open slightly if the detection signal is output a predetermined number of times. but,
Since it stops in that state and an alarm is issued, it also works as a crime prevention device, and even if the detection signal is output at time intervals, the descending distance will be longer, so it will never be possible to repeat the movement up and down in the lower limit range. The shutter will not open and is highly effective in preventing crime.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a circuit diagram of a switching control device, FIG. 2 is a general schematic diagram of a shutter, and FIG. 3 is a diagram of a detector. 1...Shutter, 6...Control panel, 7...Obstacle detector, 21...Stop circuit, 22...Rising circuit,
23...Descent circuit, 24...Closed position detector, 2
5...Waveform shaping circuit, 26...Rise detection circuit,
29...first timer, 31...first comparator, 34...second comparator, 35...first counter, 36...second timer, 40...third comparator , 44...Alarm circuit.

Claims (1)

[Claims] 1 A control device that controls a shutter stop circuit, ascent circuit, descent circuit, and alarm circuit in response to a detection signal from an obstacle detector at the bottom of the shutter and a shutter closed position signal, and that The first timer is connected to the rising circuit via the first comparator, and the time-up signal of the first timer is input to the stop circuit and the second timer. the second comparator is connected to a down circuit, and a second timer that operates in response to the output of the detection signal and a counter that detects the number of time-ups of the first timer are provided. The third comparator is connected to the alarm circuit and the first and second comparators so that the signal from the third comparator is connected to the first and second comparators. In addition, a closed position detector is connected to the second comparator so that the signal from this detector is transmitted to the second comparator. 1. A shutter opening/closing control device characterized in that the shutter opening/closing control device is configured such that a signal is not outputted to a descending circuit when an input signal is input.