JPH0782974A - Automatically shutting device for shutter - Google Patents

Abstract

PURPOSE:To make it possible to surely execute braking release and braking return of a braking mechanism with only switching supply of DC. power in the case of emergency without using a high-capacity battery, and to lower a shutter curtain quickly with its dead weight to enable the prevention of fire spreading or dmage to the other part to a minimum. CONSTITUTION:A tension wire 9 ecoonecting one end thereof to a braking mechanism 7 of an opening and shutting machine 5 is wound on a winding shaft 14, the winding shaft 14 is connected to a motor 12 through a clutch mechanism 13 and, at the same time, a ratchet gear 15 are provided to a clutch disc 13a on the winding shaft 14 side. The front end section of a coming-in and out lever 25 of a DC solenoid 24 is connected to an interlocking claw 23 with the ratchet gear 15 to wind and rewind the tension wire 9 with switching supply of power to the motor 12 and DC solenoid 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic shutter closing device for opening and closing a building opening, and more specifically, it is installed in a remote place by detecting electric power supplied from a fire detector, an emergency alarm, or the like. The present invention relates to an automatic closing device for automatically closing a shutter that has been opened.

[0002]

2. Description of the Related Art Conventionally, shutters installed at the entrances and exits of stores, warehouses, etc. are used to prevent an emergency situation from occurring in the security department in the event of an emergency such as a fire, an earthquake, or a power outage that has occurred in or near the building in which the shutter is installed. There is a disaster prevention measure that employs an automatic closing device to notify the user and close the shutter curtain in the open state to prevent the spread and damage to other parts. In this type of automatic closing device, the opening and closing mechanism that winds and rewinds the shutter curtain is equipped with a braking mechanism, and normally, this braking mechanism keeps the shutter curtain open by restricting the free rotation of the opening and closing mechanism. Then
In an emergency, the braking operation of the braking mechanism is released so that the shutter curtain is lowered by its own weight, and the drive power of the braking mechanism must reliably perform the releasing operation of the braking mechanism even during a power failure. Therefore, the DC power from the battery is used.

However, in the conventional configuration, it is necessary to continuously supply a large amount of DC power to the braking mechanism in order to maintain the braking release state while the shutter curtain is descending by its own weight, and a large capacity battery must be used. In addition to this, it has an extremely serious drawback in disaster prevention that the deterioration of the power retention capacity and charging function due to aging of the battery is unavoidable, and in the worst case, the braking mechanism cannot be released. It was

[0004]

SUMMARY OF THE INVENTION The present invention was devised in view of the above situation to solve the conventional drawbacks, and its object is to use a battery having a large capacity, In an emergency, braking of the braking mechanism can be released and braking can be reliably performed only by switching and supplying DC power, and the shutter curtain is quickly lowered by its own weight to prevent fire spread and damage to other parts to a minimum. It is an object of the present invention to provide an automatic shutter closing device.

[0005]

In order to solve the problems, a technical means adopted by the present invention is to provide a winding shaft having one end of a pulling wire connected to a braking mechanism of an opening / closing machine and the other end of which is fixed. ,
The clutch shaft is coaxially connected to the output shaft of the electric motor, and the rotation limit switch is arranged so as to face the outer circumference of rotation of the clutch disc of the clutch mechanism, while the rotation limit switch is arranged on the clutch disc on the winding shaft side. , A ratchet gear is provided to control the rotation of the pulling wire in the rewinding direction, and the tip of the retracting rod of the DC solenoid is connected to the locking claw that meshes with the ratchet gear, and the electric power is switched to the electric motor and the DC solenoid. It is characterized in that the pulling wire is configured to be wound and unwound when supplied.

Therefore, according to the present invention, since the DC power of the battery is used only in the case of an emergency, the consumption of the battery can be prevented as much as possible, and the braking release against the self-weight drop of the shutter curtain in the emergency and the Braking can be returned safely and reliably.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 is a shutter installed in a building opening 2, and the shutter 1 is
The shutter curtain 4 is wound in a shutter case 3 provided laterally above the opening 2, and a shutter 5 arranged on one side of the shutter case 3 is rotationally driven to guide the shutter curtain 4 to the guide rails 6, 6. It is configured to wind and rewind along.

The opening / closing device 5 has a braking mechanism 7 incorporated in the rear part of its main body, and normally, when the shutter curtain 4 is fully opened by opening the control box 1a arranged near the opening 2. After the braking of the braking mechanism 7 is released, the shutter curtain 4 is wound into the shutter case 3 by the rotational driving of the opening / closing device 5, and when the opening 2 is fully opened, the braking of the braking mechanism 7 is restored and the shutter curtain 4 is shuttered. The shutter curtain 4 is held in the case 3 and the braking of the braking mechanism 7 is released by closing the control box 1a.
Is closed by the weight of the vehicle to close the opening 2. The braking mechanism 7 is configured to release the braking when energized and enter the braking state when de-energized.

In the shutter case 3, an automatic closing device 8 which will be described later is arranged along the lateral beam 3a, and the braking mechanism 7 and the automatic closing device 8 are interlockedly connected via a pulling wire 9. It is like this.

The automatic closing device 8 is shown in FIG.
As shown in (b) and FIG. 3, a small electric motor 12 is built in a box-shaped casing 11 in which mounting pieces 10 and 10 are integrally formed, and a clutch mechanism 13 is provided on an output shaft 12 a of the electric motor 12.
The take-up shaft 14 is coaxially connected to the clutch mechanism 13 by means of a clutch disk 13a located on the take-up shaft 14 side of the clutch mechanism 13, and a ratchet gear 15 is provided side by side with the output shaft 12a side. A curved rotation switching plate 16 is provided along the outer peripheral surface of the clutch disc 13b located at the position, and the rotation limit is such that the actuator 17a is projected so as to face the outer peripheral surface of the rotation switching plate 16. Switch 1
7 is arranged to constitute an automatic closing device 8.

A holding metal fitting 19 for fixing the end portion of the cable 18 in which the pulling wire 9 is inserted is bent and formed on the outer side of the housing 11, and the holding metal fitting 19 and the housing 11 are formed. One end of the pulling wire 9 that penetrates is fixed to the winding shaft 14 via a set screw 20, and a pulley on which a rotation adjusting pin 21 is projectingly provided on the end side of the winding shaft 14. 22 is coaxially supported.

On the other hand, a locking claw 23 that meshes with the ratchet gear 15 is disengageably disposed on the upper portion of the ratchet gear 15, and a retractable rod 25 of a DC solenoid 24 is connected to a tip portion 23a thereof. In general, the urging ammunition machine 26 keeps the projecting and retracting rod 25 projecting to the engaging side of the locking claw 23, and the ratchet gear 15 and the locking claw 23 are connected to each other by externally supplied DC power. Is disengaged. In addition, 27 is a DC electric power from the outside for the electric motor 1
2, a terminal block for branching and supplying to the clutch mechanism 13 and the DC solenoid 24, and 28 is a locking boss for restricting rotation of the pin 21.

In the above structure, when the shutter 1 is opened by the control box 1a, first the braking mechanism 7 is opened.
The braking state is released, and the shutter curtain 4 is lifted by the rotational driving of the opening / closing device 5 and is wound into the shutter case 3. Next, when the opening 2 reaches the fully open state, the winding drive of the shutter curtain 4 is stopped, the braking mechanism 7 is driven again for braking, and the shutter curtain 4 remains wound in the shutter case 3. Hold.

With the shutter curtain 4 fully open, in an emergency such as a fire, an earthquake, or a power failure, each alarm device (not shown) is activated to notify the security department of the occurrence of an emergency. Thereafter, when DC power is supplied from the security department to the terminal block 27 of the automatic closing device 8, the clutch mechanism 13 is excited to connect the clutch disks 13a and 13b, and the electric motor 12 moves in the direction of arrow A. It is rotationally driven, the rotational driving force of the electric motor 12 is transmitted to the winding shaft 14, and the winding operation of the pulling wire 9 by the winding shaft 14 is started. Then, the rotation switching plate 16 also rotates in the same direction in association with the rotation of the clutch disc 13b, and the actuator 17a of the rotation limit switch 17 causes the rotation switching plate 1 to rotate.
When riding on the rotating tip portion of 6, the rotation limit switch 17 is turned off, and the electric motor 12 and the clutch mechanism 1
The DC power supply to 3 is cut off, and at that time, the winding shaft 14
The winding of the pulling wire 9 due to is stopped.

At this time, when the pulling wire 9 is wound,
The braking state of the braking mechanism 7 is released, and the shutter curtain 4 in the fully opened state starts to descend due to its own weight. At the same time, the direct current power supply is cut off, so that the clutch disks 13a and 13b.
Although the connection is also disconnected, the take-up shaft 14 is pulled by the engagement of the ratchet gear 15 and the locking claw 23 provided along with the clutch disc 13a on the take-up shaft 14 side during the descent period of the shutter curtain 4. Since the winding state of the wire 9 is maintained, it is not necessary to supply DC power for maintaining the winding state of the pulling wire 9.

After that, when there is a victim who is late to escape from the inside of the building while the shutter curtain 4 is descending by its own weight, D
When DC power is supplied to the C solenoid 24, the retractable rod 25 of the DC solenoid 24 moves up against the urging force of the urging ammunition machine 26, and accordingly, the locking claw 23 and the ratchet gear 1
5, the clutch disc 13a on the take-up shaft 14 side is freely rotated, the tension of the pulling wire 9 is released, the braking mechanism 7 returns to the braking state, and the weight of the shutter curtain falls by its own weight. Will be stopped immediately, and the victim can escape to the outside through the opening 2 in the half-opened state.

After that, when the DC power supply to the DC solenoid 24 is cut off and the DC power supply to the electric motor 12 and the clutch mechanism 13 is restarted, the take-up shaft 14 is operated as described above.
The pulling wire 9 is wound up by the operation, the braking state of the braking mechanism 7 can be released, the shutter curtain 4 is lowered to the fully closed state, and fire spread to other parts and damage are prevented to a minimum. can do.

[0018]

In summary, according to the present invention, the take-up shaft having the other end of the pulling wire having one end connected to the braking mechanism of the switch is fixed to the output shaft of the electric motor through the clutch mechanism. And a rotation limit switch is arranged so as to face the outer circumference of rotation of the clutch disc of the clutch mechanism,
The clutch disk on the winding shaft side is provided with a ratchet gear to regulate the rotation of the pulling wire in the unwinding direction, and the tip of the retractable rod of the DC solenoid is connected to the locking pawl that meshes with the ratchet gear. Since the pulling wire is wound and rewound by the electric power switching supply to the electric motor and the DC solenoid, the braking release and the braking return of the braking mechanism can be performed in an emergency without using a large capacity battery. It can be performed reliably only by switching and supplying DC power, and the shutter curtain can be quickly lowered by its own weight to prevent the spread and damage to other parts to the minimum, and the DC power of the battery can be used only in an emergency. Since it is used, the consumption of the battery can be prevented as much as possible, and the deterioration of the power retention ability and the charging function due to the aging of the battery can be eliminated. , A very useful novel effect such that the braking release and the braking return against the self-weight drop of the shutter curtain in an emergency can be performed safely and reliably, and thus the stable automatic closing operation can be maintained for a long period of time, etc. Is played.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part.

FIG. 2A is an enlarged plan view of a main part. (B) is an action explanatory view of the same main part showing the engagement state of the ratchet gear and the locking claw.

FIG. 3 is an explanatory view of the operation of the essential parts showing the connection between the pulling wire and the winding shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shutter 5 opening / closing device 7 braking mechanism 8 automatic closing device 9 pulling wire 14 winding shaft 13 clutch mechanism 12 electric motor 12a output shaft 13a clutch disc 13b clutch disc 15 ratchet gear 17 rotation limit switch 23 locking claw 24 DC solenoid 25 Haunting rod

Claims (1)

[Claims] 1. A winding shaft having one end fixed to another end of a pulling wire connected to a brake mechanism of an opening / closing machine is coaxially connected to an output shaft of an electric motor through a clutch mechanism to form the clutch mechanism. While the rotation limit switch is arranged so as to face the outer circumference of rotation of the clutch disk of, the ratchet gear is attached to the clutch disk on the winding shaft side in order to restrict the rotation of the pulling wire in the rewinding direction. , A locking claw that meshes with the ratchet gear is connected to the tip of the retracting rod of the DC solenoid, and the pulling wire is wound and rewound by switching power supply to the electric motor and the DC solenoid. Automatic shutter closing device.