JPH0442480Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an electric shutter with a safety control device that can automatically close stores, banks, factories, etc. without an operator.

(Prior art) Generally, when automatically closing a store, factory, bank, cashier corner, etc. by remote control of an electric shutter, there is a risk of collision with an obstacle as the shutter curtain lowers. It is necessary to prevent human danger and damage to the shutter, and for this purpose, shutter curtains equipped with safety devices such as a detector for detecting obstacles at the lower end of the shutter curtain are known.

In addition, since the shutter curtain slides up and down, it is also possible to control the shutter curtain by sending the signal from the detector to the shutter control panel by radio waves rather than by wire, for example, as disclosed in Japanese Utility Model Publication No. 54-7908. 1971-
No. 89742).

In such conventional technology, the obstacle detector is installed on the shutter curtain that slides up and down, so it is difficult to supply power or transmit signals using wires such as lead wires. The detector uses a battery power source, and the detection signal is transmitted by radio, light, or the like.

Using a battery power source may reduce power consumption.

However, due to the structure of a shutter in which a detector with a power source is installed at the lower end of the shutter curtain, when the shutter curtain is closed, that is, when the shutter curtain lands, it may cause damage to the floor surface where the shutter curtain lands. It is activated by the detector detecting an obstacle, and it continues to operate while the shutter is closed, or if a power outage occurs while the detector is detecting an obstacle, the shutter is activated. Since the curtain stops operating, the detector will continue to detect obstacles, which will rapidly deplete the battery power, which is an important safety issue in that the detector will not operate if the shutter curtain is driven again. However, this method also has problems, such as consuming unnecessary power.

(Problem to be solved by the invention) The present invention was made to solve the above-mentioned problems, and aims to provide a safety control device for an electric shutter that suppresses the operating current to the detector as much as possible. This is the purpose.

(Means for Solving the Problems) The present invention is a safety control device for an electric shutter, in which a switch is connected in series with a relay and a capacitor, which are closed by the operation of an obstacle detector provided at the lower end of the shutter curtain. The transmitter is characterized in that the circuit is connected to a battery, and power is supplied from the battery to the transmitter by a switch circuit of the relay.

In the above configuration, the detection signal from the obstacle detector can be a radio wave or a sound wave.

Further, a plurality of obstacle detectors may be provided, or a detector having a long detection area such as a tape switch may be used.

(Embodiment) An embodiment of the safety control device for an electric shutter according to the present invention will be described with reference to the drawings.

Reference numeral 1 denotes an obstacle detector that is activated when the shutter curtain 10 comes into contact with an obstacle attached to the lower surface of the seat plate 11 provided at the lower end of the shutter curtain 10; The transmitter 2 is connected to the transmitter 2.

In addition, the obstacle detector 1 has a battery 13 on the top surface of the seat plate 11 as its power source, and when the obstacle detector 1 is activated, the power source of the battery 13 is used to perform the following control. This is to send a signal to the board 4.

The obstacle detector 1 is formed of a circuit shown in FIG. 3, in which 14 is a switch that operates when it comes into contact with an obstacle, 15 is a relay, 15a is a contact of the relay 15, and 16 is a time constant circuit. A capacitor, 17 a discharge resistor, and 13 a power source.

4 is a control panel for remotely controlling or automatically opening and closing the shutter at fixed times; and a receiver 3 for receiving the detection signal from the transmitter 2.
When the shutter curtain 1 is lowered and the detector 1 is activated, that is, when it receives a detection signal, the shutter curtain 1
The shutter curtain 10 is temporarily stopped by controlling the switch 5 connected to the motor 6 for driving the shutter curtain 10, and then raised to a certain height and then lowered again until the obstacle is removed. They learn to perform the movements repeatedly.

In addition, if this repetitive operation is repeated beyond a preset predetermined time detected by the timer 7, the control panel 4 controls the timer 7.
Upon receiving this signal, it stops the subsequent repeated operations, turns on an abnormality display section 8 such as a lamp around the shutter that indicates an abnormality, and issues a signal to a remote control section 9 of a security company etc. to inform it of the abnormality. .

12 is a guide rail on which the shutter curtain 10 slides.

The operation of the obstacle detector will be explained. When the obstacle detector detects an obstacle, the switch 14 of the detector 1 is switched from the position shown in FIG.
The relay 15 is connected to the battery 13 side and operates, its contact 15a is turned on, and the transmitter 2 operates to generate a detection signal, which is transmitted to the receiver 3.

A capacitor 16 is connected in series to the relay 15 to form a time constant circuit, so after a period of time corresponding to the time constant has elapsed, the current flowing through the relay 15 becomes less than the holding current and the relay 15 becomes inoperable. Then, the contact 15a is disconnected and the transmitter 2 stops transmitting the detection signal. Therefore, even if the obstacle detector remains activated and the relay 15 remains connected to the power source, the transmitter 2 will not continue to operate.

When the obstacle detector becomes inactive and the switch 14 is in the position shown in the figure, the capacitor 16 is discharged by the resistor 17, and the next time the switch 14 is turned on, a new detection signal is generated. The device is ready to send.

Therefore, when the obstacle detector reaches its activation time limit as shown in Figure 4A due to the above-mentioned repeated operation, the power supply to the transmitter is switched to each of the obstacle detectors as shown in Figure 4B. Limited only to the beginning of the activation time limit. In addition, even if the obstacle detector continues to operate as shown in Figure C due to a power outage, etc. while the obstacle detector is in operation, the power supply to the transmitter will continue as shown in Figure C.
As shown in Figure 2, the charging current of the capacitor limits the operation of the obstacle detector only to the beginning.

Note that the relay 15 is not limited to the so-called electromagnetic type, and a relay circuit such as a transistor relay can be used.

The detection signal transmitted by the transmitter 2 is received by the receiver 3 connected to the control panel 4 that controls the opening and closing of the shutter, etc., and the receiver 3 connects the opening/closing device 5 connected to the drive motor 6 via the control panel 4. activate it,
It controls the lowering operation of the shutter curtain 10.

(Effects of the invention) As explained above, according to the invention, when the detector detects an obstacle etc., the transmitter can transmit only the minimum necessary detection signal. It does not consume unnecessary power and can effectively use a power source such as a battery for a long period of time, and for safety and other reasons, it is possible to prevent the power source such as a battery from rapidly depleting and not transmitting a detection signal. This has the effect of solving crime prevention problems.

In addition, when the detector detects the landing position, such as the floor surface, the transmitter does not continue to send out detection signals, so there is no need to raise the shutter curtain slightly above the floor surface, etc. The shutter can be closed at any time.

[Brief explanation of the drawing]

The drawings show an embodiment of the safety control device for an electric shutter according to the present invention. Fig. 1 is a system diagram, Fig. 2 is a front view of the main parts, and Fig. 3 is an obstacle detection system according to the embodiment. Circuit diagram of the detection circuit in the device, 4th
The figure is an explanatory diagram of the operation. 1...detector, 2...transmitter, 3...receiver,
4...Control panel, 5...Switch, 6...Motor,
7... Timer, 8... Abnormality display section, 9... Remote control section, 10... Shutter curtain, 11...
Seat plate, 12...Guide rail, 13...Battery, 14...Switch, 15...Relay, 15a
...Relay contact, 16...Capacitor, 17...
…resistance.

Claims (1)

[Scope of utility model registration request] A series circuit consisting of a switch, a relay, and a capacitor that is closed by the operation of an obstacle detector provided at the lower end of the shutter curtain is connected to the battery, and the switch circuit of the relay connects the battery to the transmitter. A safety control device for an electric shutter, characterized in that it is configured so that power is supplied.