JP2002266574A - Fire preventive shutter control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire preventive shutter capable of previously preventing a clamping accident of the fire preventive shutter. SOLUTION: The fire preventive shutter control device 5 is provided with an electric motor 11 for opening and closing a shutter curtain 1, a motor detection means 37 for receiving a closing signal and controlling an automatic closing device 13 lowering the shutter curtain 1 by the own weight and detecting the operation of the motor 11, an obstacle detection means 7 for detecting the obstacle of the shutter curtain 1, and a control means 25. In the case that the control means 25 receives a closing signal, the shutter curtain 1 is lowered by the motor 11, when the obstacle detection signal is received, the motor 11 is stopped, and in the case that the motor 11 does not operate, the closing signal is transmitted to the automatic closing device 13 to lower the shutter curtain 1 by the own weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire shutter control device, and more particularly to a fire shutter control device for preventing a fire shutter from being pinched.

[0002]

2. Description of the Related Art Fireproof shutters are devices that detect heat or smoke during a fire and automatically lower the shutter curtain. Conventional fireproof shutters are equipped with a brake that stops the shutter curtain from falling by its own weight and an automatic closing device that releases the brake when a closing signal is received. Descend.

[0003]

Since the shutter that is descending under its own weight continues to be forced down even if there is an obstacle in the way, there is a risk that evacuees and others may be caught in the shutter when they fall under their own weight due to fire or malfunction. There has been a need for such measures. The present invention has been made in view of the above points, and an object of the present invention is to provide a fireproof shutter that can prevent a fireproof shutter from being pinched and an accident.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a fire prevention shutter control device for controlling a motor for opening and closing a shutter curtain and an automatic closing device for receiving the closing signal and lowering the shutter curtain by its own weight. Motor detection means for detecting the operation of the motor, obstacle detection means for detecting an obstacle, and control means, when the control means receives a closing signal, lowers the shutter curtain by the motor and When an obstacle detection signal is received, the motor is stopped, and when the motor is inoperable, a closing signal is sent to the automatic closing device to lower the shutter curtain by its own weight.

Further, the present invention relates to a fire prevention shutter control device for controlling a motor for opening and closing the shutter curtain and an automatic closing device for receiving the closing signal and lowering the shutter curtain by its own weight, wherein the motor detection means detects the operation of the motor. And an obstacle detection means for detecting an obstacle, a relay means for controlling a closing signal sent to the automatic closing means, and a control means, wherein the control means receives a closing signal during normal power supply. , Shut off the relay means, lower the shutter curtain by the motor, stop the motor when receiving an obstacle detection signal, connect the relay means in case of power failure, send the closing signal to the automatic closing device, Characterized by having its own weight drop

[0006]

FIG. 1 is a schematic view showing an example of an embodiment of the present invention. A shutter curtain 1 is driven to open and close by a driving device 3. The driving device 3 receives a motor and a closing signal. And an automatic closing device for lowering the shutter curtain by its own weight. Control device 5
Functions as a fireproof shutter control device for controlling the motor and the automatic closing device. The control device 5 is connected to a receiver 7 and a push button switch 9. The driving device 3 and the control device 5 are supplied with power from a common power supply.

FIG. 2 is a block diagram showing the configuration of the driving device 3 and the control device 5. The driving device 3 includes a motor 11 for opening and closing the shutter curtain 1 and an automatic opening and closing device 13. The automatic opening / closing device 13 activates / releases a brake for braking the self-weight drop of the shutter curtain 1, and receives a closing signal (for example, DC12V) output from a sensor such as a fire detector or a smoke detector to apply a brake. Release. The brake is driven by, for example, a motor or a solenoid, and when the brake is released, the shutter curtain 1 descends by its own weight. The automatic closing device 13 shown in FIG. 2 includes a solenoid 15, and when a closing signal is sent via a line 17, the solenoid 15 is operated to release the brake, and the shutter curtain 1 falls by its own weight. At this time, the switch 19 is also turned on in conjunction with the solenoid 15, and a brake release signal is sent to the control device 5 via the line 21.

The control device 5 has a repeater 23,
The repeater 23 connects or disconnects the externally supplied closing signal to or from the automatic closing device 13, and its control is performed by the CPU 25 (control means). The repeater 23 includes a relay 27 and a driving circuit 29 thereof, as shown in FIG.
When a brake signal is output from the PU 25 to the drive circuit 29, the relay 27 is excited by the drive circuit 29, the contact is switched to the a contact, the closing signal is cut off, and the shutter is electrically lowered (motor driven lowering). become. When the brake signal from the CPU 25 stops, the drive circuit 29 does not operate, the relay 27 is demagnetized and returns to the contact b, and the closing signal is transmitted to the automatic closing device 13. When the automatic closing device 13 is driven, the switch 19 is turned on, and this is detected by the CPU 25 via the signal detecting circuit 31. The signal detection circuit 31 is configured by, for example, a bridge circuit or the like.

The push button switch 9 is a switch for opening and closing the shutter by switching the direction of rotation of the motor, and outputs signals of up, stop and down to the CPU 25 by operating the U, S and D buttons, respectively. . The CPU 25 receives the signal and outputs u,
The direction of rotation of the motor 11 is switched by switching the s and d contacts. Each contact of the switch 33 is connected by a push button wire 35 to a coil portion of a relay constituting a forward / reverse rotation circuit of the motor 11. The motor 11 is, for example, a three-phase induction motor, and when two arbitrary power lines are replaced, the rotating magnetic field is reversed and the motor 11 rotates in the opposite direction. The replacement of the wiring is performed by switching the relay. The current detection circuit 37 detects a current flowing through the push button line 35, and detects a relay operation (that is, connection of the motor 11 to a power supply line) by detecting the current. Here, the current detection circuit 37 functions as a motor detection unit that detects the operation of the motor, and can be configured by, for example, a rectifier circuit, a bridge circuit, or the like.

The control device 5 further includes a closing signal detection circuit 24 for detecting whether a closing signal has arrived, and a relay 26 for outputting the closing signal input to the control device 5 to another device. 26 is turned on / off by a command from the CPU 25.

As shown in FIG. 1, a shutter curtain 1
The detection plate 39 and the transmitter 41 are provided at the lower end of the, while the receiver 7 is disposed above the transmitter 41.
When the detection plate 39 comes into contact with an obstacle, an unillustrated limit switch or the like is turned on, and an obstacle detection signal such as light, radio wave, or sound wave is output from the transmitter 41, and the signal is input to the CPU 25 via the receiver 7. Is done. Detection plate 39,
The transmitter 41 and the receiver 7 constitute an obstacle detecting means. Guide rails (not shown) for vertically guiding the shutter are arranged on both sides of the shutter curtain 1, and a lower limit detection magnet 43 is arranged near the lower end of the guide rail. The transmitter 41 includes a magnet 43
When the shutter curtain 1 is lowered to the lowermost end, a lower limit detection signal is output from the transmitter 41, and this signal is input to the CPU 25 via the receiver 7.

The fireproof shutter of the above example has the following three operation modes. (1) Obstacle sensing mode of normal operation The fire shutter is raised and lowered by operating the push button switch 9. If an obstacle is hit during the descent by the push button 9, the shutter is stopped, for example, for 1 second, and then reversely rises for 2 seconds and stops. Thereafter, even if the push button switch 9 is lowered, the above operation is repeated as long as there is an obstacle.

(2) Obstacle Sensing Mode of Fire Prevention Shutter This mode is entered when a closing signal is input from a fire (smoke) detector and the normal power supply is turned on. The shutter moves down electrically, and the operation of the push button switch 9 is invalidated until the descent is completed. When hitting an obstacle during descent, for example, it stops for 1 second, reverses for 2 seconds, and after 1 second, automatically descends again.

(3) Self-weight descent mode Even when the closing signal is input from the fire (smoke) sensor and the normal power is turned off (power failure), and even when the normal power is turned on, This mode is entered when the motor 11 does not operate. In this mode, the automatic closing device 13 is operated, and the shutter curtain 1 descends by its own weight, and does not detect an obstacle.

Next, the operation of the fireproof shutter control device will be described with reference to the flowchart of FIG. First, when the control device 5 starts up, the closing signal detection circuit 24
It is checked whether or not the closing signal is ON (step 401).
The brake signal from U25 is released and the closing signal is sent to the automatic closing device 13 to lower the weight of the shutter (step 402). If it is off, the closing signal is continuously monitored thereafter (step 403).
) Is checked (step 404). If the operating state is normal, the shutter is lowered by an electric motor, that is, lowered by a motor (step 405). It descends (step 402). The operation state of the obstacle detection means is stored in, for example, a flag in the CPU 25, and an abnormality in the obstacle detection operation (for example,
Is not received by the receiver 7 in spite of being transmitted from the receiver 7), and stored in the flag. Step 4
At 04, the flag is checked.

In step 406, the operation of the motor 11 is detected by the current detection circuit 37, and
If is operated, it is detected whether or not there is an obstacle (step 407). If an obstacle is detected, the motor 11 is stopped (step 408). If the motor 11 is not operating in step 406, the shutter is lowered by its own weight (step 402). If no obstacle is detected in step 407, the process returns to step 405 to continue the electric lowering of the shutter. When the lower end of the shutter curtain 1 comes into contact with the floor, the detection plate 39 is activated, and the transmitter 41 is activated.
, The motor 11 stops as in the case where an obstacle is detected (step 408). Finally, check whether the closing signal is on (step 40).
9) If it is turned off, return to step 403 and repeat the above operation. In step 408, the expression “motor stop” is used. In detail, the operation of the fire prevention shutter in the obstacle detection mode is performed as described above. Descent automatically again after stopping.

By the way, when the power supply to the driving device 3 is stopped, it can be detected by the motor detecting means (current detecting circuit 37) for detecting the operation of the motor, and in that case, it is switched to the shutter self-weight drop. On the other hand, when the power supply to the control device 5 is stopped, the CPU 2
Since the brake signal is not output as a result of the deactivation of 5, the relay 27 of FIG. 3 returns to the contact b, a closing signal is sent to the automatic closing device 13, and the shutter falls by its own weight.

When the fire prevention shutter control device as described above is used, even when the shutter is lowered by the closing signal, the shutter is electrically lowered, and if an obstacle is detected in the process, the shutter stops and the safety of the evacuated person can be ensured. ,
By switching to the shutter self-weight drop at the time of power failure, the shutter can be reliably lowered even at the time of power failure or when the motor cannot be operated.

In the above example, as the motor detecting means for detecting the operation of the motor, the operation of the motor is detected by the current flowing to the coil of the relay constituting the forward / reverse rotation circuit of the motor. Not limited. For example, another method may be used as long as it is detected that the motor is operating, such as by directly detecting the rotation of the rotating shaft of the motor by an encoder or the like. If the detection is performed based on the coil current of the relay as in the above example, the existing push button wire 35 is used, so that the operation of the motor can be detected with a simple configuration without making a large change to the existing device. Further, the obstacle detecting means is not limited to the one constituted by the transmitter and the receiver as in the above example, but may be of any other type as long as it detects an obstacle of the shutter.

In FIG. 1, outputs 1 and 2 receive, for example, an output signal for detecting the lower end of a shutter curtain,
A terminal for outputting a signal or the like to notify the outside (security center or the like) that the shutter has been completely closed. By using this, it is possible to remotely confirm that the fire shutter is completely closed. In the conventional device, it was only possible to confirm that the automatic closing device or the limit switch was operated mechanically, and it was not possible to directly confirm that the shutter was closed. It is possible to confirm that the door has been closed. Further, by connecting this output terminal to an external alerting device, it is also possible to output an alarm (alarm sound, display, lighting, etc.) for alerting during the self-weight drop of the shutter.

[0021]

According to the present invention, it is possible to provide a fireproof shutter that can prevent a fireproof shutter from being pinched and prevent the accident from occurring, and can operate reliably even when the motor is abnormal or when a power failure occurs.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating an example of an embodiment of the present invention.

FIG. 2 is a block diagram of a driving device and a control device.

FIG. 3 is a diagram showing a configuration of a repeater.

FIG. 4 is a flowchart showing the operation of the fireproof shutter control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 3 Drive device 5 Control device 7 Receiver 9 Push button switch

Claims (3)

[Claims] 1. A fire-retardant shutter control device for controlling a motor for opening and closing a shutter curtain and an automatic closing device for receiving the closing signal and lowering the shutter curtain by its own weight, comprising: motor detection means for detecting the operation of the motor; An obstacle detection means for detecting the position of the shutter curtain; and a control means for, when receiving the closing signal, lowering the shutter curtain by the motor and stopping the motor when receiving the obstacle detection signal, and A fire-retardant shutter control device, characterized in that when the shutter is inoperable, a closing signal is sent to the automatic closing device to lower the shutter curtain by its own weight. 2. A fire-retardant shutter control device for controlling a motor for opening and closing a shutter curtain and an automatic closing device for receiving the closing signal and lowering the shutter curtain by its own weight, comprising: motor detection means for detecting operation of the motor; Obstacle detecting means for detecting the closing signal, relay means for controlling a closing signal sent to the automatic closing means, and control means, the control means, when receiving the closing signal during normal power supply, the relay means Shut off and lower the shutter curtain by the motor, stop the motor when receiving an obstacle detection signal, connect the relay means in case of power failure, send the closing signal to the automatic closing device and lower the shutter curtain by its own weight A fire shutter control device, characterized in that: 3. The fireproof shutter control device according to claim 1, further comprising a lower limit detection unit that outputs a signal when the shutter curtain is closed, so that the shutter can be confirmed to be closed.