JP2000034876A - Safety device for dead-weight falling shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct an emergency stop by the detection of an obstruction even during the dead-weight falling of a shutter curtain. SOLUTION: A brake braking the dead-weight falling of a shutter curtain and an automatic closing device 12, through which electricity is conducted on the basis of the sensing of a smoke sensor 18 and which release the braking of the brake, are installed to the dead-weight falling shutter. A seat-board switch detecting an obstruction and a switch contact 19b stopping electric conduction to the automatic closing device on the basis of the detection of the obstruction and emergency-stopping the dead-weight falling are mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a doorway of a building,
A device belonging to the technical field of a safety device for a self-weight drop shutter that is built in a passageway, etc., and is set so that the shutter curtain falls by its own weight based on the release of brakes linked to the operation of fire sensors, smoke sensors, etc. It is.

[0002]

2. Description of the Related Art In general, some architectural shutters normally open and close based on the drive of an electric switch, and in the event of a fire or the like, when an emergency occurs, a brake is applied based on detection of this by a sensor. A so-called fireproof shutter is known in which the shutter curtain is lowered by its own weight, thereby closing the passage and stopping the spread of fire regardless of the presence or absence of a power failure. On the other hand, in the case of a normal electric shutter, when an obstacle is detected during the closing operation, safety is considered so that an obstacle is not pinched by the shutter curtain by, for example, urgently stopping the closing operation of the shutter curtain.

[0003]

In the prior art, the fire prevention shutter is supposed to be automatically lowered and closed by its own weight even in the event of a power failure in an emergency. There is no driving, and it does not operate even if there is obstacle detection. As a result, during the self-weight closing operation, there is a possibility that the evacuee may be pinched by the shutter curtain, and it is required to deal with this, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above-mentioned circumstances, and has a shutter curtain which drops its own weight to close an opening. Brake means for braking the self-weight drop, brake release means for releasing the braking of the brake means in response to the input of an abnormal signal in a fire or the like, obstacle detection means provided on the shutter curtain to detect an obstacle, Emergency stop means for outputting a command for returning to the brake operating state to the brake release means based on the obstacle detection of the obstacle detection means and urgently stopping the self-weight drop. . And in this way, when an evacuated person touches the shutter curtain which is falling under its own weight in an emergency such as a fire, the shutter curtain will be emergency stopped,
Evacuees can be prevented from being caught by the shutter curtain, and safety can be ensured. In this device, the brake release means is to be energized by the input of the abnormal signal to perform the brake release operation, and to return to the brake operation state by stopping the energization, the emergency stop means,
It can be constituted by a switch means for stopping the energization of the brake release means. In addition, 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, the evacuee can escape from the emergencyly stopped shutter curtain with a margin. It is convenient.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a dead-weight type shutter device which is built in an opening such as a passage, an entrance or the like, and a shutter curtain 2 constituting the shutter device 1 is mounted on a winding drum 4 provided in a shutter case 3. Winding up and down and up and down movement by being guided by guide rails 5 erected on the left and right sides of the opening are all conventional.

Reference numeral 6 denotes an electric switch which is linked to the winding drum 4 and includes a speed reducer 7a.
A built-in opening / closing motor 7, a speed governor 8 for controlling the speed when the shutter curtain 2 descends under its own weight, and a brake 9 for braking the shutter curtain 2 under its own weight are incorporated.

Reference numeral 10 denotes an opening / closing control unit (control panel) for controlling the operation of the electric switchgear 6. The circuit of the opening / closing control unit 10 includes various operations for opening, stopping, and closing operations. Switches (open switch PBU, stop switch PB
S, the 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 switch 6 in response to a switch operation of the operation switch 11 so that the shutter curtain 2 is electrically controlled to be opened / closed. When an open or close drive control command is received from the open / close control unit 10, the open / close motor 7
At the same time, the brake 9 is energized, whereby the brake is released, the motor is driven, and the opening and closing operation of the shutter curtain 2 is performed by electric power. Although the omission is omitted, the release of the brake 9 is performed when the electromagnetic solenoid is actuated when energized, whereby the excitation core (operating rod) moves against the urging force of the elastic body. It is configured to perform electrical release.

On the other hand, reference numeral 12 denotes an automatic closing device. The automatic closing device 12 is driven based on an operation signal from an interlocking controller 13 which will be described later. A brake release operating unit 15 that operates to mechanically release the brake 9;
Switch 16 and brake 9 for stopping
Is held by using a lock electromagnetic clutch 17 which operates based on an operation signal from the interlocking controller 13 and the like. When the operation signal is not output from the interlocking controller 13, the automatic closing device 12 does not energize the release motor 14 and the locking electromagnetic clutch 17, and does not participate in the brake 9 in this state.
When an activation signal is output and the release motor 14 and the lock electromagnetic clutch 17 are energized, the brake release operation unit 15 operates based on the drive of the release motor 14 to mechanically release the brake 9 and The brake release state is maintained by the locking electromagnetic clutch 17, whereby the shutter curtain 2 is released from braking by the brake 9 and descends by its own weight to automatically close the opening. I have. On the other hand, when the power supply to the automatic closing device 12 is cut off during the self-weight drop, the brake release state holding by the locking electromagnetic clutch 17 is released, and the brake 9 automatically returns to the braking state. The brake is applied to the self-weight drop of No. 2 and an emergency stop is performed.

The interlocking controller 13 has a built-in battery (usually set to 24 V DC) so that it operates even in the event of a power failure.
Smoke detector 1 used as an example of detecting an emergency such as a fire
8 is connected, and receives an operation of detecting the smoke detector 18 and outputs an operation signal to energize the automatic closing device 12.

On the other hand, the lowermost seat plate 2a of the shutter curtain 2 has a movable plate 19a which relatively moves upward when an obstacle comes in contact with the shutter curtain 2 while the shutter curtain 2 is descending. There is provided a seat plate switch 19 which is configured by using a micro switch 19c which switches a switch contact 19b by moving, and detects an obstacle by the seat plate switch 19. A cord 19d extending from the microswitch 19c is wound around a cord reel 19e provided inside the shutter case 3, and is wound up and down as the shutter curtain 2 moves up and down.

Further, in the present embodiment, the switch contact 19b of the seat plate switch 19 is set to a contact b (normally closed contact), and as shown in the electric circuit diagram of FIG. And an output circuit E for connecting the plus side output terminal C of the automatic closing device 12 to the plus side input terminal D shared by the release motor 14 and the locking electromagnetic clutch 17. When the obstacle detection by the seat plate switch 19 is not performed, the switch contact 19b is closed and 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, whereby the power to the automatic closing device 12 is cut off.

In the configuration described above, in an emergency when the smoke detector 18 detects and operates, an operation signal is output from the interlocking controller 13 to energize the automatic closing device 12,
As a result, as described above, the braking of the brake 9 is released, and the opening is closed by the descent of the shutter curtain 2 by its own weight. In this case, the shutter curtain 2 that descends by its own weight contacts the evacuee. In such a case, this is detected by the seat plate switch 19, and the power supply to the automatic closing device 12 is stopped, whereby the brake 9 is actuated and the shutter curtain 2 is stopped urgently. When the obstacle detection by the seat plate switch 19 is stopped, the power supply to the automatic closing device 12 is restarted, and the self-weight drop of the shutter curtain 2 is continued.

According to the embodiment of the present invention, the shutter curtain 2 is automatically lowered by its own weight in the event of a fire or the like, so that the opening can be closed. When an evacuee touches the shutter curtain 2, the shutter curtain 2 is stopped urgently, 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 to ensure safety.

The present invention is, of course, not limited to the above-described first embodiment, and may be configured as in the second to fourth embodiments described below. In, the same as the first embodiment,
Or, what is common in each embodiment,
The description is omitted, and the same reference numerals are given. First, a second embodiment will be described with reference to an electric circuit diagram shown in FIG. 7. The second embodiment is configured such that a positive output terminal C of an interlocking controller 13 and a positive input terminal D of an automatic closing device 12 are connected. The output circuit E to be connected has a seat plate switch 19
Switch contact 19b (b contact) and timer contact 2
0a (a contact) is connected in series. Further, a timer 20 is provided in a timer circuit I connected to the plus side output terminal C and the minus side output terminal F of the interlocking controller 12, but the timer contact 20a
Is set to switch from the open state to the closed state after a lapse of a preset time T after the timer 20 is operated. In the second embodiment, when an activation signal is output from the interlocking controller 13 based on the detection of the smoke detector 18, first, the timer circuit I is energized and the timer 20 is activated. After the set time T has elapsed since the operation of the timer 20, the timer contact 20a is closed and the automatic closing device 12 is energized. As a result, the shutter curtain 2 descends by its own weight. If an obstacle is detected by the seat plate switch 19 during the fall of its own weight, the switch contact 19b is opened and the automatic closing device 12 The energization is stopped, and the shutter curtain 2 is urgently stopped. Then, when the obstacle detection by the seat plate switch 19 is stopped, the power supply to the automatic closing device 12 is restarted, and the self-weight drop of the shutter curtain 2 is continued. Timer 2 after becoming non-detection state
After the elapse of the set time T of 0, the self-weight descent of the shutter curtain 2 is restarted. That is, the resumption of the descent of the shutter curtain 2 is delayed for the set time T. Shutter curtain 2
Can be escaped from below with a sufficient margin, and more reliable pinch prevention can be performed.

In the third embodiment shown in FIG. 8, an obstacle detection circuit J connected to a plus output terminal C and a minus output terminal F of the interlocking controller 13 is provided.
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 when the obstacle is not detected and closes when the obstacle is detected. ), A resistor R1, a diode 21, and a relay RY1 are connected in series, and a capacitor 22 is connected in parallel to the relay RY1. Further, the output circuit E that connects the plus-side output terminal C of the interlocking controller 13 and the plus-side input terminal D of the automatic closing device 12 switches from closed to open when the relay RY1 is excited. Although the relay contact RY1 (b contact) is connected, 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 controlled based on the detection of the smoke detector 18.
, The switch contact 19b is open in a state where the seat plate switch 19 does not detect an obstacle, and thus the obstacle detection circuit J is not energized and the relay RY1 is in a non-energized state. It 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. If an obstacle is detected by the seat plate switch 19 during the fall of its own weight, the switch contact 19b is closed and the obstacle detection circuit J is energized. Then, the relay RY1 is excited to open the relay contact RY1. As a result, the power supply to the automatic closing device 12 is stopped, and the shutter curtain 2 is urgently stopped. However, electricity is stored in the capacitor 22 while the relay RY1 is energized. And
When the obstacle detection by the seat switch 19 disappears,
When the switch contact 19b is opened and the obstacle detection circuit J is de-energized, the relay RY1 is kept in the excited state only while the capacitor 22 is discharged. And the relay contact RY1 is closed. As a result, the energization of the seat plate switch 19 to the automatic closing device 12 is resumed, and the self-weight drop of the shutter curtain 2 is continued. Thereafter, the delay is caused only during the discharging of the capacitor 22, and the same effect as that of the second embodiment is obtained. Further, in the third embodiment,
As described above, the resumption of the descent of the shutter curtain 2 by its own weight can be delayed to more reliably prevent the evacuees from being pinched. When output,
The relay contact RY1 is closed and the automatic closing device 1
2, the descent of the shutter curtain 2 under its own weight 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 a state where the obstacle is not detected, when the operation signal is output from the interlocking controller 13, the switch is caused by a fire or the like. Even when the cord 19d of the plate switch 19 is disconnected, the emergency stop of the shutter curtain 2 by the obstacle detection is not performed, but the power is supplied to the automatic closing device 12 and the shutter curtain 2 falls by its own weight. In other words, 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. However, 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 a built-in battery. Therefore, the pulse signal output from the interlocking controller 13 is continuously output by its own circuit. The circuit for it is built in. That is, in the relay box 23 of the fourth embodiment, a battery 27 that is continuously charged by a trickle charge from a power supply (100 V AC) via a transformer 24, a fuse 25, a diode 26, and a resistor R2 is provided. 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 with the obstacle detection circuit J. Relay R
Y3 excitation circuit K and the battery 27 (24 VDC)
And the relay contact RY1
(A contact), switch contact 29 of lower limit switch
(A contact) and a lower limit circuit M in which a relay RY4 is connected in series, 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
RY2 in which diode 30 is connected in parallel to
A self-holding circuit N is provided, and an output circuit E that connects a plus-side output terminal C of the interlocking controller 13 and a plus-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, the lower limit switch is not shown,
It is set at a position immediately before the shutter curtain is fully closed, and is set so that the switch contact 29 is switched from open to closed when the shutter curtain 2 reaches the set position. Further, the relay contact RY1 is connected to the switch contact 1 of the seat plate switch 19, similarly to the third embodiment.
9b is actuated when the switch contacts 19b are closed.
This is an OFF delay timer contact that returns to the non-operation state a little after the opening of b (with a delay by the discharging time of the capacitor 22). In this device, when a pulse signal is output from the interlocking controller 13 based on the detection of the smoke detector 18, the circuit K for the relay RY3 is energized and the relay RY is turned on.
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 self-weight drop of the shutter curtain 2 is executed. The shutter curtain 2 based on the obstacle detection during the self-weight drop is performed. The emergency stop and the resumption of the self-weight descent after the obstacle is not detected are the same as those in the third embodiment, and therefore the description is omitted. Then, when the shutter curtain 2 falls by its own weight and reaches the set position of the lower limit switch, the switch contact 29 is closed, and further, when the movable plate 19a of the seat switch 19 is grounded and the switch contact 19b is closed,
When the lower limit circuit M is energized, the relay RY4
Excites 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 will fall under 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 self-weight descent from the terminal without any trouble.

In the first to fourth embodiments,
A movable plate 19a is used as a seat plate switch for detecting an obstacle.
Although the structure using the micro switch 19c, the code 19d, and the code reel 19e is adopted, it is a matter of course that 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,
When the movable plate 29 comes into contact with an obstacle and moves upward, a claw portion 29 protruding toward the guide rail 5 and pressing the tape switch 28 is provided. It may be configured to perform object detection, and various obstacle detection means may be appropriately employed.

[Brief description of the 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 the seat switch.

FIGS. 5A and 5B are cross-sectional views taken along line AA of FIG.
It is an arrow view.

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 the seat plate switch.

[Explanation of symbols]

 2 Shutter curtain 9 Brake 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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) E06B 9/208 (72) Inventor Hiroshi Matsubara 2-1-1 Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industry (72) Inventor Takashi Nagata 2-1-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industrial Co., Ltd. F-term (reference) 2E042 AA01 BA01 CA01 CB04 CB06 CC05 CC06 CC08 DA01

Claims (3)

[Claims] 1. A shutter curtain which drops its own weight to close an opening, a brake means which brakes the own weight drop, and a brake release means which releases a brake of the brake means in response to input of an abnormal signal in a fire or the like. An obstacle detecting means provided on the shutter curtain and detecting an obstacle;
An emergency stop means for outputting a command for returning to the brake operating state to the brake release means based on the obstacle detection by the obstacle detection means and urgently stopping the self-weight drop, Safety equipment. 2. The brake release means according to claim 1, wherein the brake release means is energized when an abnormal signal is input to perform a brake release operation, and is deactivated to return to a brake operation state. The means is a safety device for the self-weight drop shutter which is constituted by a switch means for stopping energization of the brake release means. 3. The safety device for a self-weight drop shutter according to claim 1, further comprising delay means for delaying re-lowering of the shutter curtain due to the absence of obstacle detection.