JP2003176679A - Safety device for gravity-dependent falling shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for a gravity-dependent falling shutter, which can urgently stop gravity-dependent fall of a shutter curtain upon detection of an obstacle. <P>SOLUTION: The safety device for the gravity-dependent falling shutter is composed of a brake, an auto-closing device 12, a base board switch, and a switch contact point 19b. The brake carries out braking of the gravity- dependent fall of the shutter curtain. The auto-closing device 12 is energized by a battery power source built in a gang control unit upon detection of a smoke sensor 18, to thereby cancel the brake. The base board switch functions to detect an obstacle. The switch contact point 19b stops energization to the auto-closing device upon detection of the obstacle even in the event of a power failure, and urgently stops the gravity-dependent fall. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a doorway of a building,
Belonging to the technical field of a safety device for a self-weighting shutter that is built in a passageway and set so that the shutter curtain lowers its own weight based on the release of the brake linked to the operation of a detector such as a fire detector or smoke detector Is.

[0002]

2. Description of the Related Art Generally, among shutters for construction, an opening / closing operation is normally performed based on the drive of an electric switch, and in the event of an emergency such as a fire, a brake is applied based on the detection of the sensor. There is known a so-called fire-prevention shutter in which the shutter curtain is released by its own weight so that the shutter curtain is lowered by its own weight regardless of whether or not there is a power outage to close the passage to prevent the spread of fire. On the other hand, there are some ordinary electric shutters that have a safety consideration so that when an obstacle is detected during the closing operation, the closing operation of the shutter curtain is urgently stopped so that the obstacle is not caught by the shutter curtain.

[0003]

By the way, in the above-mentioned prior art, since the fire-prevention shutter is premised on automatically lowering its own weight and closing it even in the event of a power failure in an emergency, therefore, when the self-weight is closed, the opening / closing mechanism It does not work even when there is no drive and obstacle detection. As a result, there is a risk that the evacuee may be caught in the shutter curtain during the self-weight closing operation, and it is required to deal with this, which is the problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances to solve these problems, and it is a shutter curtain for lowering its own weight to close the opening. A braking means for braking the self weight drop, a brake releasing means for releasing the braking of the braking means in response to the input of an abnormal signal in a fire or the like, and an obstacle detecting means provided on the shutter curtain for detecting an obstacle, Emergency stop means for outputting a command for returning to the brake release state to the brake release means on the basis of the obstacle detection by the obstacle detection means to make an emergency stop of the descent of its own weight is configured. . By doing so, when an evacuee touches the shutter curtain, which is dropping by its own weight in case of an emergency such as a fire, the shutter curtain will be brought to an emergency stop.
It is possible to prevent the evacuees from being caught in the shutter curtains and ensure safety. In this, the brake releasing means is energized by the input of the abnormality signal to perform the brake releasing operation, and the energization is stopped to restore the brake operating state.
The brake release means may be constituted by a switch means for stopping energization. Further, in the case where the delay means for delaying the re-lowering of the shutter curtain due to the disappearance of the obstacle detection is provided, it is possible for the evacuees to escape with a margin from the shutter curtain that has been emergency stopped. , Convenient.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. In the figure, 1 is a self-weighting type shutter device built in openings such as passages and entrances, and a shutter curtain 2 constituting the shutter device 1 is mounted on a winding drum 4 installed in a shutter case 3. It is the same as in the related art that it is wound up, guided by guide rails 5 standing upright on the left and right of the opening, and moved up and down.

Reference numeral 6 denotes an electric switchgear connected to the winding drum 4, and the electric switchgear 6 includes a speed reducer 7a.
A built-in opening / closing motor 7, a speed governor 8 that controls the speed of the shutter curtain 2 when its own weight is lowered, and a brake 9 that brakes the own weight of the shutter curtain 2 are incorporated.

Reference numeral 10 denotes an opening / closing control unit (control panel) for controlling the drive of the electric switchgear 6, and the circuit of the opening / closing control unit 10 has operations for opening, stopping and closing. Switch (open switch PBU, stop switch PB
S, a closing switch PBD) 11 is connected. The opening / closing control unit 10 is configured to output an opening / closing drive control command to the electric opening / closing device 6 in accordance with the switch operation of the operation switch 11 to electrically open / close the shutter curtain 2. When there is a control command for opening or closing drive from the opening / closing control unit 10, the opening / closing motor 7
At the same time, the brake 9 is energized, the brake is released, the motor is driven, and the shutter curtain 2 is electrically opened and closed. However, this operation control mode is generally known. Although omitted, the brake 9 is released by actuating an electromagnetic solenoid when energized, thereby moving an exciting iron core (actuating rod) against the urging force of the ammunition, and based on this, the brake 9 is released. It is configured to be electrically released.

On the other hand, reference numeral 12 is an automatic closing device, and the automatic closing device 12 is driven by a releasing motor 14 which is driven based on an operation signal from an interlocking controller 13 which will be described later, and by which the releasing motor 14 is driven. The brake release actuating unit 15 that operates to mechanically release the brake 9, and the release motor 14 by detecting that the brake 9 is in the released state.
Micro switch 16 and brake 9 for stopping
The lock electromagnetic clutch 17 is operated based on the operation signal from the interlocking controller 13 so as to maintain the release state. In the automatic closing device 12, neither the release motor 14 nor the locking electromagnetic clutch 17 is energized in a state where the operation signal is not output from the interlocking controller 13, and in this state, the automatic closing device 12 does not participate in the brake 9.
When the actuation signal is output and the release motor 14 and the locking electromagnetic clutch 17 are energized, the brake release actuating portion 15 operates based on the drive of the release motor 14 to mechanically release the brake 9. The brake release state is maintained by the locking electromagnetic clutch 17, whereby the shutter curtain 2 is released from the braking by the brake 9 and is lowered by its own weight to automatically close the opening. There is. On the other hand, when the power supply to the automatic closing device 12 is cut off while the weight is falling, the holding of the brake release state by the locking electromagnetic clutch 17 is released and the brake 9 automatically returns to the braking state, whereby the shutter curtain. It is designed so that it will be braked due to its own weight drop of 2 and will make an emergency stop.

Further, the interlocking controller 13 has a built-in battery (normally set to DC 24V) so that it can be operated even during a power failure.
Smoke detector 1 used as an example of detecting an emergency such as a fire
8 is connected to output an operation signal for energizing the automatic closing device 12 in response to the sensing operation of the smoke detector 18.

On the other hand, to the seat plate 2a at the lowermost end of the shutter curtain 2, a movable plate 19a that moves relatively upward when an obstacle comes into contact with the shutter curtain 2 while the shutter curtain 2 is descending, and the movable plate 19a is moved upward. A seat plate switch 19 configured by using a micro switch 19c that switches the switch contact 19b by moving is provided, and the seat plate switch 19 is configured to detect an obstacle. A cord 19d extending from the micro switch 19c is wound around a cord reel 19e installed in the shutter case 3, and is wound and rewound as the shutter curtain 2 moves up and down.

Further, the switch contact 19b of the seat plate switch 19 is set to the b contact (normally closed contact) in the present embodiment, and as shown in the electric circuit diagram of FIG. It is incorporated in the output circuit E for connecting the plus side output terminal C of No. 2 to the plus side input terminal D shared by the releasing motor 14 of the automatic closing device 12 and the locking electromagnetic clutch 17. Then, when the obstacle detection by the seat plate switch 19 is not performed, the switch contact 19b is closed so that the power from the interlocking controller 13 can be supplied to the automatic closing device 12. When the object is detected, the switch contact 19b is opened, so that the power supply to the automatic closing device 12 is cut off.

In the configuration as described above, the operation signal is output from the interlocking controller 13 to energize the automatic closing device 12 in an emergency when the smoke sensor 18 senses and operates,
As a result, as described above, the braking of the brake 9 is released and the opening of the shutter curtain 2 is closed due to its own weight drop. In this, however, the shutter curtain 2 of its own weight contact with the evacuees. In such a case, this is detected by the seat plate switch 19 and the energization of the automatic closing device 12 is stopped, whereby the brake 9 is activated and the shutter curtain 2 is brought to an emergency stop. Then, when the obstacle detection by the seat plate switch 19 disappears, the power supply to the automatic closing device 12 is restarted, and the self-weight lowering of the shutter curtain 2 is continued.

In the embodiment of the present invention, the shutter curtain 2 is automatically lowered by its own weight so that the opening can be closed in the event of a fire or the like. When an evacuee touches the shutter curtain 2, the shutter curtain 2 is brought to an emergency stop, and the stop of the shutter curtain 2 is maintained while an obstacle is detected. It is possible to avoid being caught in the shutter curtain 2 and ensure safety.

The present invention is of course not limited to the above-mentioned first embodiment, but can be constructed as in the second to fourth embodiments described below, but these are also possible. In the above, in common with the first embodiment,
Or, regarding the common features in the respective embodiments,
Description is omitted and common reference numerals are given. First, the second embodiment will be described with reference to the electric circuit diagram shown in FIG. 7. In this embodiment, the positive side output terminal C of the interlocking controller 13 and the positive side input terminal D of the automatic closing device 12 are connected. The seat plate switch 19 is connected to the output circuit E to be connected.
Switch contact 19b (contact b) and timer contact 2
0a (a contact) is connected in series. Further, the timer 20 is provided in the timer circuit I connected to the plus side output terminal C and the minus side output terminal F of the interlocking controller 12, and the timer contact 20a is provided.
Is set to switch from open to closed after a preset time T has elapsed since the timer 20 was activated. Then, in the second embodiment, when an operation signal is output from the interlocking controller 13 based on the detection of the smoke sensor 18, first, the timer circuit I is activated by energizing the timer circuit I. The timer contact 20a is closed after the set time T has elapsed after the timer 20 is activated, and the automatic closing device 12 is energized. As a result, the shutter curtain 2 is lowered by its own weight. However, if an obstacle is detected by the seat plate switch 19 during the reduction of its own weight, the switch contact 19b is opened, so that the automatic closing device 12 is closed. The energization is stopped and the shutter curtain 2 is brought to an emergency stop. When the seat plate switch 19 no longer detects an obstacle, the energization of the automatic closing device 12 is resumed, and the weight of the shutter curtain 2 is continuously lowered. In this case, the seat plate switch 19 is turned off. Timer 2 after undetected
The self-weight descent of the shutter curtain 2 is restarted after the lapse of the set time T of 0, that is, the restart of the self-weight descent of the shutter curtain 2 is delayed for the set time T. Shutter curtain 2
Since it is possible to escape from the lower side of the vehicle with a margin, it is possible to more reliably prevent the trapping.

In the third embodiment shown in FIG. 8, the obstacle detection circuit J connected to the plus side output terminal C and the minus side output terminal F of the interlocking controller 13 is used.
In addition, the switch contact 19b of the seat plate switch 19 (in the third embodiment, the switch contact 19b is set to an a contact (normally open contact) that opens in an obstacle non-detection state and closes in a detection state). , The resistor R1, the diode 21, and the relay RY1 are connected in series, and the capacitor 22 is connected in parallel to the relay RY1. Further, in the output circuit E connecting the positive side output terminal C of the interlocking controller 13 and the positive side input terminal D of the automatic closing device 12, the relay RY1 is excited to switch from closed to open. The relay contact RY1 (contact b) is connected, but the relay contact RY1 and the obstacle detection circuit J are incorporated in the relay box 23. In the third embodiment, the interlocking controller 13 is based on the detection of the smoke sensor 18.
When the operating signal is output from the switch, the switch contact 19b is opened when the seat plate switch 19 is not detecting an obstacle, so that the obstacle detecting circuit J is not energized and the relay RY1 is in the non-excited state. Has become. At this time, the relay contact RY1 is closed, and the power from the interlocking controller 13 is supplied to the automatic closing device 12. As a result, the shutter curtain 2 falls by its own weight. When an obstacle is detected by the seat plate switch 19 during the own weight of the shutter curtain 2, the switch contact 19b is closed to energize the obstacle detection circuit J. Then, the relay RY1 is excited and the relay contact RY1 is opened. As a result, the power supply to the automatic closing device 12 is stopped and the shutter curtain 2 is stopped urgently, but electricity is stored in the capacitor 22 while the relay RY1 is excited. And
When obstacle detection by the seat plate switch 19 disappears,
Although the switch contact 19b is opened and the obstacle detection circuit J is in the non-energized state, in this case, the relay RY1 is kept in the excited state only while the capacitor 22 is discharged, and is in the non-excited state after the discharge of the capacitor 22 is completed. Then, the relay contact RY1 is closed. As a result, the energization of the automatic closing device 12 of the seat plate switch 19 is resumed, and the weight reduction of the shutter curtain 2 is continued. However, the restart of the weight reduction causes the seat plate switch 19 to be in the non-detection state. After that, there is a delay only during the discharge of the capacitor 22, and the same effect as that of the second embodiment is obtained. Furthermore, in the third embodiment,
As described above, the restart of the descent of the shutter curtain 2 can be delayed to more reliably prevent the evacuees from being trapped, but first, the operation signal from the interlocking controller 13 is detected based on the detection of the smoke sensor 18. When output,
The relay contact RY1 is closed and immediately closed automatically.
By energizing 2, the weight drop of the shutter curtain 2 can be started without delay. In addition, since the switch contact 19b of the seat plate switch 19 is set to the a contact which is opened in the non-detection state of the obstacle, when the operation signal is output from the interlocking controller 13, this device has a Even if the cord 19d of the plate switch 19 is broken, the shutter curtain 2 is not urgently stopped by detecting an obstacle, but the automatic closing device 12 is energized and the shutter curtain 2 descends by its own weight. Therefore, it is useful as a fireproof shutter.

Further, in the first to third embodiments, the interlocking controller 13 is configured to continuously output 24 V DC, but in the fourth embodiment shown in FIG. The interlocking controller 13 is configured to output a pulse signal in order to save the capacity of the built-in battery. Therefore, the pulse signal output from the interlocking controller 13 is continuously output by its own circuit. The circuit for is built in. That is, the relay box 23 of the fourth embodiment is provided with the battery 27 that is continuously charged by trickle charging from the power source (AC 100 V) via the transformer 24, the fuse 25, the diode 26, and the resistor R2. Further, the relay box 23 is provided with an obstacle detection circuit J similar to that of the third embodiment, and a relay RY3 and a diode 28 are connected in parallel to the obstacle detection circuit J in parallel. Relay R
Y3 excitation circuit K and the battery 27 (DC24V)
Circuit L for connecting the battery and the relay contact RY1
(A contact), switch contact 29 of the lower limit switch
(A contact) and a relay RY4 are connected in series to a lower limit circuit M, a relay contact RY2 (a contact) and a relay RY2 are connected in series, and a relay contact RY3 is connected in parallel to the relay contact RY2. RY2
Relay RY2 in which diode 30 is connected in parallel to
A self-holding circuit N is provided, and an output circuit E that connects the positive-side output terminal C of the interlocking controller 13 and the positive-side input terminal D of the automatic closing device 12 includes:
A relay contact RY4 (b contact), a relay contact RY2 (a contact), and a relay contact RY1 (b contact) are provided.
Here, although the lower limit switch is not shown,
The shutter curtain is set to a position immediately before the shutter curtain is fully closed, and when the shutter curtain 2 reaches the set position, the switch contact 29 is switched from open to closed. The relay contact RY1 is the switch contact 1 of the seat plate switch 19 as in the case of the third embodiment.
9b is actuated as the switch is closed, and the switch contact 19
It is an OFF delay timer contact which returns to the non-operating state a little after the opening of b (delayed by the discharge time of the capacitor 22). In this case, when a pulse signal is output from the interlocking controller 13 based on the detection of the smoke sensor 18, the circuit K for the relay RY3 is energized and the relay RY is relayed.
3, the relay contact RY3 is closed, the relay RY2 self-holding circuit N is energized, and the relay contact RY2 is self-held in the closed state. As a result, the current from the battery 27 is continuously output to the automatic closing device 12, and the weight reduction of the shutter curtain 2 is performed. However, the shutter curtain 2 based on the obstacle detection during the weight reduction. Since the emergency stop and the restart of the self-weight descent after the obstacle non-detection state are the same as those in the third embodiment, the description thereof will be omitted. Then, when the shutter curtain 2 descends by its own weight to reach the set position of the lower limit switch and the switch contact 29 is closed, and further, the movable plate 19a of the seat plate switch 19 is grounded and the switch contact 19b is closed,
The lower limit circuit M is energized and the relay RY4
Is excited to open the relay contact RY4 provided in the output circuit E. As a result, the output circuit E is opened, the self-holding of the relay RY2 is released, and the entire circuit returns to the initial state. By doing so, even if the interlocking controller 13 outputs a pulse signal, the shutter curtain 2 drops its own weight in an emergency, an emergency stop based on obstacle detection, and an obstacle non-detection state. It is possible to operate the resumption of the weight drop from the vehicle without any trouble.

Further, in the first to fourth embodiments,
As a seat plate switch for detecting an obstacle, a movable plate 19a,
A micro switch 19c, a cord 19d, and a cord reel 19e are used, but the present invention is not limited to this. For example, as shown in FIG. On the other hand, a movable plate 29 that can move up and down is attached to the seat plate 2a
When the movable plate 29 comes into contact with an obstacle and moves upward, a claw portion 29 that protrudes toward the guide rail 5 and presses the tape switch 28 is provided. It may be configured to detect an object, and various kinds of obstacle detecting means can be appropriately adopted.

[Brief description of drawings]

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

FIG. 2 is a partial front view showing the inside of a shutter case.

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

FIG. 4 is a front view of a seat plate switch.

5A and 5B are cross-sectional views taken along the line AA in FIG.
FIG.

FIG. 6 is an electric circuit diagram showing the first embodiment.

FIG. 7 is an electric circuit diagram showing a second embodiment.

FIG. 8 is an electric circuit diagram showing a third embodiment.

FIG. 9 is an electric circuit diagram showing a fourth embodiment.

FIG. 10 is a diagram showing another example of a seat plate switch.

[Explanation of symbols]

2 shutter curtains 9 brakes 12 Automatic closing device 13 interlocking controller 14 Release motor 17 Locking electromagnetic clutch 18 smoke detector 19 Seat switch 19b switch contact 20 timer 22 Capacitor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Matsubara             2-1, 1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa             Inside Shatter Industry Co., Ltd. (72) Inventor Takashi Nagata             2-1, 1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa             Inside Shatter Industry Co., Ltd. F term (reference) 2E042 AA01 CA01 CA11 CA12 CB05                       CC04 CC05 CC06 CC08 DA01                       DB02

Claims (3)

[Claims] 1. A shutter curtain for lowering its own weight to close an opening, a braking means for braking the lowering of its own weight, and a brake releasing means for releasing the braking of the braking means in response to the input of an abnormal signal such as a fire. An obstacle detecting means provided on the shutter curtain for detecting an obstacle,
A self-weight lowering shutter configured to include an emergency stop unit that outputs a command for returning to the brake release state to the brake release unit based on the obstacle detection of the obstacle detection unit to make an emergency stop of the self-weight lowering. Safety device. 2. The brake release means according to claim 1, wherein the brake release means is energized to perform a brake release operation when an abnormality signal is input, and is returned to a brake operating state when the energization is stopped. The means is a safety device for a self-weight lowering shutter, which is constituted by a switch means for stopping energization to the brake releasing means. 3. A safety device for a self-weight lowering shutter according to claim 1 or 2, further comprising delay means for delaying the re-lowering of the shutter curtain when the obstacle is no longer detected.