JP2002081281A - Manual closing mechanism of fire shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manual closing mechanism restricting no installing place of a manual closing unit, and stop a descent of a shutter curtain when a person, etc., is caught at closing time by the manual closing mechanism. SOLUTION: This manual closing mechanism is provided with an automatic closing device 14 for lowering the shutter curtain by releasing a brake means by an operation signal outputted by detecting emergency such as fire time, an obstacle detecting means for detecting an obstacle and a stopping means for stopping the descent by returning the brake means on the basis of detection of the obstacle detecting means at descending time. The manual closing unit 22 is electrically connected to the automatic closing device 14. The brake means is released by outputting a closing signal to the automatic closing device 14 according to a request from the manual closing unit 22. The brake means is returned by a detecting signal from the obstacle detecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof shutter in which a shutter curtain descends in an emergency such as a fire, and to a manual closing mechanism for manually closing the shutter curtain.

[0002]

2. Description of the Related Art In a shutter device, a shutter curtain is normally opened and closed by a drive of a switch, and in an emergency such as a fire, a brake is released based on detection of smoke or heat by a sensor, and a self-weight. In some cases, a shutter curtain is lowered to section and close a predetermined part of the building to prevent the spread of fire.

[0003] Normally, the electric shutter is provided with an obstacle detecting means for preventing an obstacle such as a person or an object from being caught when the shutter curtain descends. The closing operation of the shutter is stopped based on the detection of the object detecting means.

However, in the event of a fire or the like, the shutter curtain descends by its own weight by releasing the brake means without detecting the fire or manually operating the shutter curtain without driving by the switch. Stop means in time do not work. Therefore, there is a fear that the evacuee may be pinched by the shutter curtain when the shutter curtain falls under its own weight. This is a common problem when the shutter curtain is lowered by the manual closing device. The manual closing device is used, for example, when it is necessary to urgently lower the shutter curtain without waiting for the closing of the shutter curtain based on smoke detection or the like. The conventional manual closing device releases the brake via a wire.If the manual closing device releases the brake means and lowers the shutter curtain, a person or the like falls under the shutter curtain during closing. There was no means to stop the lowering operation when it was caught.

[0005] Further, in the conventional manual closing device, the brake release (shutter closing) and non-release (stop while the shutter is descending) of the switch is performed by pulling or returning a wire attached to the brake. In the installation of the wire of the manual closing device, resistance is generated due to the length of the wire cable, the size of the bending R, the number of bending points, or the friction between the inner wire and the outer cable. There were restrictions.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a manual closing mechanism in which the installation place of the manual closing device is not restricted. Is what you do. Another object of the present invention is to make it possible to stop the lowering of the shutter curtain when a person or the like is caught during closing by the manual closing mechanism.

[0007]

In order to achieve the above object, the technical means adopted by the present invention is to detect an emergency such as a fire and release the brake means by an operation signal output to release the shutter curtain. An automatic closing device for lowering, an obstacle detecting means for detecting an obstacle, and a stopping means for stopping the descent by returning the brake means based on the detection of the obstacle detecting means at the time of descent; A manual closing device is electrically connected to the closing device, and in response to a request from the manual closing device, a closing signal is output to the automatic closing device to release the brake means. The brake means is configured to be returned by the detection signal of (1).

[0008] Preferably, the manual closing mechanism includes a standby power supply device, and when a signal is input from the manual closing device, a closing signal is output from the standby power supply device to the automatic closing device. You. More preferably, a detection signal from a smoke detector or the like is also output to the automatic closing device via the standby power supply device.

One feature of the manual closing mechanism according to the present invention is that a manual closing device for electrically releasing the brake means is employed. Compared to the conventional manual closing device that mechanically releases the brake means using a wire, in the case of the present invention, the degree of freedom of the installation position of the manual closing device is increased, and since only the electric wires are connected, It is not necessary to adjust the tension of the wires. Furthermore, since the brake means was released electrically using an automatic closing device,
Obstacle detection means can be used.

[0010]

Embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of the shutter device, FIG. 2 is a front view of the shutter device, and FIG. 3 is a side view showing the inside of the shutter case. The shutter device has a shutter case 1 installed above an opening, and a shutter case 1. A take-up shaft 2 rotatably supported by the inside thereof, a shutter curtain 3 wound around the take-up shaft 2, and guide rails 4 erected on the left and right of the opening. And the shutter curtain 3 is fed out or wound up, and the shutter curtain 3 moves up and down while being guided by the guide rails 4 at both ends to open and close the opening.

The switchgear 5 comprises an electric motor 6, a speed reducer 7, a speed governor 8, and a brake means 9. When the motor is driven electrically, the rotation of the electric motor 6 is transmitted through the speed reducer 7 to the winding shaft. 2, the shutter curtain 3 moves up and down to perform opening and closing operations. Always, shutter curtain 3
Of self-weight is regulated by the brake means 9,
When the regulation by the brake means 9 is released in an emergency, the shutter curtain 3 descends by its own weight while being governed by the governor 8.

The operation of the switchgear 5 is controlled by the switchgear controller 10. A switch 11 for opening, stopping, and closing operations is electrically connected to a circuit of the opening / closing control unit 10. By operating the switch 11, an opening / closing drive control command is issued to the switch 5. When an opening / closing control command is issued from the opening / closing control unit 10, the electric motor 6 and the brake unit 9 are energized to release the braking by the brake unit 9, and the electric motor 6 is driven. An opening / closing operation by the curtain 3 is performed. The release means of the brake means 9 in this case is known. For example, when an electric current is supplied, an electromagnetic solenoid operates, and based on this, the excitation core moves against the urging force of the spring, and the brake is electrically released.

A description will be given of the descent of the shutter curtain 3 due to the disaster prevention signal. When the smoke (heat) sensor 12 detects smoke, the contacts of the sensor 12 are turned on. As a result, the battery built in the interlocking controller 13 outputs
4V is transmitted to the standby power supply 21
From the automatic return type automatic closing device 14 with a timer circuit and the relay box 15. When power of 24 VDC is supplied to the automatic closing device 14, the motor 14b of the automatic closing device 14 rotates and pulls the brake lever 90 of the switch 5 with the wire 14a to release the brake means 9. When the brake means 9 of the switchgear 5 is released, the shutter curtain 3 descends by its own weight and closes the opening.

The structure of the automatic closing device 14 will be described with reference to FIG. When the interlocking controller 13 receives the disaster prevention signal, a voltage signal from the interlocking controller 13
1 and an operation signal (DC
24V) is supplied to the DC geared motor 14b and the DC micro clutch 14j, and the suction plate 14d operates to rotate the pulley 14e. Then, the inner wire 14f wound around the pulley 14e is pulled, and the brake means 9 of the switch 5 is released. Although the motor 14b is stopped by the operation of the microswitch 14c set in advance on the pulley 14e, the pulley 14e does not rotate reversely due to the action of the ratchet pawl 14h and the ratchet gear 14i. Further, when the start signal (24 VDC) supplied to the clutch 14j is cut off, the clutch suction plate 14d is separated, the pulley 14e rotates freely, the inner wire 14f returns, and the brake means 9 of the switch 5 returns. The configuration of such an automatic closing device 14 is known.

There is a case where it is desired to manually lower the fire shutter without waiting for the 24 V DC operation signal output by the smoke detector 12. In the embodiment according to the present invention, the push-button type manual closing device 22 is provided.
Are electrically connected to the standby power supply 21. The manual closing device 22 is provided as a switch box at an appropriate place where it is easy for a person to push.

The standby power supply 21 is supplied to the automatic closing device 14 by a signal (24 VDC) from the interlocking controller 13 or a no-voltage contact signal of the manual closing means 22 until the brake release power supply is completely closed, including during a power failure. It is configured to supply.

When the push button type manual closing device 22 is turned on, an operation signal (24 VDC) is output from the standby power supply device 21, the brake means 9 of the switch 5 is released via the automatic closing device 14, and the shutter curtain is released. 4 descends to close the opening. On the other hand, when the operation signal (24 VDC) from the smoke detector 12 is input to the auxiliary power supply 21 via the interlocking controller 13, the operation signal (24 VDC) is output from the auxiliary power supply 21 and the automatic closing device 14 , The brake means 9 of the switchgear 5 is released, and the shutter curtain 4 descends to close the opening.

The obstacle detecting means will be described. A seat plate switch 16 constituting an obstacle detecting means is provided on a seat plate 30 at the lower end of the shutter curtain 3. The seat plate switch 16 includes a movable plate 16a that relatively moves upward when the shutter curtain 3 comes in contact with an obstacle while the shutter curtain 3 is descending, and a micro switch (not shown) that switches a switch contact when the movable plate 16a moves upward. A cord 17 extends upward from the microswitch, and is wound around a cord reel 18 provided inside the shutter case 1. The cord 17 is taken up on the cord reel 18 as the shutter curtain 3 moves up and down, or is unwound from the cord reel 18.

Further, the cord 17 is electrically connected to a relay box 15 via a cord reel 18, and the relay box 15 is electrically connected to the automatic closing device 14 and the receiver 19, respectively.

When the shutter curtain 3 comes into contact with a person or an obstacle during the electric descent and the seat plate switch 16 is turned on, the signal is transmitted to the cord reel 18 and the relay box 15.
Is sent to the receiver 19 via the. When the connection between the seat plate switch connection terminals (connectors) of the receiver 19 is turned on, the receiver 1
9 outputs a stop output (connected in series with the lower limit of the limit switch 20), and the stop output is output while the seat plate switch 16 is ON. The self-holding circuit of the switch 5 is cut off by the stop output of the receiver 19, and the lowering of the shutter curtain 3 stops. Since the self-holding circuit of the switchgear 5 has been cut off even after the seat plate switch 16 has returned, the switch 1
Until one is operated, the shutter curtain 3 remains stopped. Note that self-holding circuits are well known in the art.

An obstacle detection mechanism during the descent of the shutter curtain by the disaster prevention signal and the manual closing device will be described. When the contact of the sensor 12 is turned on, the interlocking controller 13
When the connection terminals of the sensors are turned on, the interlocking controller 13
Then, power is supplied to the automatic closing device 14 via the standby power device 21. Similarly, when a no-voltage signal is input from the manual closing unit 22 to the standby power supply 21, power is supplied from the standby power supply 21 to the automatic closing device 14. When 24 V DC power is supplied to the relay box 15, the contact of the relay 15 a as the switching means is switched. When the contact of the relay box 15 is switched, the signal of the seat plate switch 16 is sent to the automatic closing device 14 via the cord reel 18 and the relay box 15. That is,
By switching the relay 15a, a signal detected by the seat panel switch 16 is transmitted to the receiver 19 in a normal state, and is transmitted to the automatic closing device 14 when a disaster prevention signal is received.

When the shutter curtain 3 comes into contact with a person or an obstacle during the descent of the shutter curtain and the seat plate switch 16 is turned on, a signal thereof is sent via the cord 17 and the relay box 15 to open the switch. Contact 16b
Is closed, and between the seat plate switch connection terminals (connectors) of the automatic closing device 14 is turned ON.

When the connection terminal (connector) of the seat switch of the automatic closing device 14 is turned ON, the relay in the automatic closing device 14 operates, and the automatic power supply device 21
DC 14 to the motor 14b and the clutch suction plate 14d
The power supply of V is cut off, the pulley 14e returns to its original position, and the brake means 9 of the switch 5 returns. When the brake means 9 of the switchgear 5 returns, the lowering of the shutter curtain 3 stops.

The automatic closing device 14 has a timer circuit. Even if there are no people or obstacles and the seat plate switch 16 returns, the capacitor 14g in the automatic closing device 14
The relay in the self-closing device 14 is held for about 10 seconds, and the power to the motor 14b of the self-closing device 14 remains off. In about 10 seconds, when the capacitor 14g is discharged and the relay returns, the DC 24
The V power is supplied to the motor 14b of the automatic closing device 14, the brake means 9 of the switch 5 is released, and the shutter curtain 3 descends again by its own weight. Again, seat switch 1
When 6 operates, the above operation is repeated. When the seat plate switch 16 does not operate (when there is no obstacle)
Then, the shutter curtain 3 descends to completely close the opening.

In the embodiment, the switch contact of the seat plate switch 16 is shown to be open when no obstacle is detected, but the point is that the switch 5 is opened by the detection of the seat plate switch 19. A circuit may be employed to stop the lowering of the shutter curtain 3 due to the above, or to return the brake means 9 at the time of its own weight descent, and the switch contact of the seat plate switch 19 is normally closed. Is also good. The obstacle detection means is not limited to the embodiment as long as it can reliably detect an obstacle by providing the shutter curtain 3. Further, the delay circuit after removing the obstacle at the time of its own weight descent is not limited to the embodiment.

[0026]

The present invention has the following advantageous effects. (1) Since the manual closing mechanism is made electrically,
The degree of freedom in installing the manual closing device (preferably, a push button type switch) is increased. (2) Conventionally, it was necessary to adjust the tension of the wire between the brake means of the switchgear and the manual closing device. However, in the present invention, such adjustment is not required because the wires are connected. . (3) In the present invention, even when the shutter curtain is lowered by manual operation, it is possible to detect a person or the like by the obstacle detection means, and when a person is present below the shutter curtain, The descent of the shutter curtain can be automatically stopped.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shutter device.

FIG. 2 is a front view of the shutter device.

FIG. 3 is a side view showing the inside of a shutter case.

FIG. 4 is a circuit diagram showing a descent stop device.

FIG. 5 shows an automatic closing device.

FIG. 6 is a circuit diagram of the automatic closing device.

FIG. 7 is a schematic view showing the entire manual closing mechanism according to the present invention.

FIG. 8 is a block diagram of a standby power supply.

[Explanation of symbols]

 3 shutter curtain 5 switchgear 15 relay box 16 seat switch

Continued on the front page F term (reference) 2E042 AA01 CA01 CA12 CB01 CB02 CB04 CB05 CB06 CB17 CC05 CC06 CC08 5G405 AA10 AB02 CA27 CA55

Claims (3)

[Claims] 1. An automatic closing device for releasing a brake means and lowering a shutter curtain by an operation signal output upon detecting an emergency such as a fire, an obstacle detecting means for detecting an obstacle, Stopping means for stopping the descent by returning the brake means based on the detection of the obstacle detecting means, wherein a manual closing device is electrically connected to the automatic closing device; A closing signal is output to the automatic closing device in response to a request from the vehicle, the brake means is released, and the brake means is returned by a detection signal from the obstacle detecting means. Manual closing mechanism for fire shutter. 2. The method according to claim 1, wherein the manual closing mechanism comprises:
A manual closing mechanism for a fireproof shutter, comprising a standby power supply, wherein a closing signal is output from the standby power supply to the automatic closing device when a signal is input from a manual closing device. 3. A manual closing mechanism for a fireproof shutter according to claim 2, wherein a detection signal from a smoke detector or the like is also output to the automatic closing device via the standby power supply device.