JPH078793Y2 - Smoke-proof shutter automatic closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an automatic closing device for a smoke-proof shutter.

[Problems to be Solved by Prior Art and Invention] In general, there is a fire prevention section provided with a shutter at the opening of a building fireproof section. However, if the smoke is detected and the shutter curtain is fully closed in the early stages of the fire, there is a danger that it will not be possible to evacuate.

Therefore, conventionally, as shown in Japanese Patent Publication No. 61-19793, there is known a smoke-proof shutter which is configured to automatically lower the shutter curtain so that the smoke does not get over, depending on the amount of smoke accumulated on the ceiling surface. ing. Therefore, this is an electric type that pulls down the shutter curtain based on smoke detection from the electric wiring of the room, and a switch that is closed by the detection operation of the smoke detector is provided in the electric circuit. Therefore, it is possible to control the descent of the shutter curtain depending on the amount of smoke, but it is until the blackout occurs, and even if smoke is detected after the blackout occurs. However, the shutter curtain will no longer descend, and as a result, the fire protection shutter will not work effectively in the half-opened state. Wiring to the moving shutter curtain is difficult, and there are problems such as poor reliability.

[Means for Solving the Problem] The present invention was devised with the object of providing an automatic closing device for a smoke-proof shutter that can eliminate these drawbacks in view of the above-mentioned circumstances. A smoke-proof shutter configured such that a shutter curtain that opens and closes based on driving can be lowered by its own weight by opening a brake, wherein a smoke detector for detecting smoke and a smoke detector are provided at a lower end portion of the shutter curtain. On the side of the body where a shutter case for storing the shutter curtain is provided, while a pair of transmitters that are arranged to transmit from the front and back curtain surfaces of the shutter curtain as a radio signal from the sensor detection signal are provided. Is a pair of receivers that respectively receive signals from the transmitters, and a brake based on the reception of a smoke detection signal from one of the receivers. The present invention is characterized by including a controller that outputs a release command and a brake release device that is activated by a battery power supply and that releases the brake based on the brake release command from the controller.

With this configuration, the present invention enables the shutter curtain to descend according to the amount of smoke even if a temporary power failure occurs.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is an electric smoke-proof (fire-proof) shutter, 2 is a shutter curtain constituting a smoke-proof shutter, and 2a is a seat plate provided at the lowermost end of the shutter curtain 2. The seat plate 2a is, for example, It has a rectangular tube shape, and smoke vents 2b are appropriately provided on both sides (both sides of shutter curtain 2).
And a smoke detector 20 with a built-in battery, which will be described later, is installed inside the seat plate 2a.

Further, 3 is a guide rail for vertically moving the shutter curtain 2, 4 is a shutter case for storing the shutter curtain 2, 4a is a ceiling portion, 4b is a magsa serving as an entrance / exit to the ceiling portion 4a of the shutter curtain 2. Reference numeral 5 denotes a take-up shaft, 6 denotes a switch with a brake 7, 6a denotes a chain connecting the switch 6 and the take-up shaft 5, and a shutter curtain 2 wound around the take-up shaft 5. Is opened and closed by driving the opening / closing device 6 to open and close, and further, with the shutter curtain 2 fully opened, the brake 7 provided to the opening / closing device 6 is released as described later. In this case, the shutter curtain 2 is automatically lowered by its own weight.
Furthermore, 8 is a switch box in which a push button switch for lifting control is installed, 9 is fire or smoke that has not reached here in an emergency, and I want to manually close the shutter curtain 2 before the detector operates. This is a shutter manual closing device used in some cases.

Reference numeral 10 denotes a brake release device, which is installed on the back of the ceiling portion 4a near the magsa portion 4b. The brake release device 10 is, for example, a DC 24 V power source (power source is a battery for the switchgear 6). It is installed in a system different from the AC power supply.) Geared motor 11, electromagnetic clutch 12, suction plate 13 attached to and detached from this electromagnetic clutch 12, pulley 14, and the direction of rotation is specified when this pulley 14 is attracted. It is composed of a ratchet gear 15, a ratchet pawl 16, a micro switch 17, a micro switch switching plate 17a, a wire 18 connected to the brake 7, and the like.

On the other hand, 22 is a light receiving portion (reception portion) provided so as to project from the surface of the ceiling 4a toward the indoor side, and is provided on both sides with the guide rail 3 sandwiched between them. It is linked to the release device 10. 21 is the seat plate 2a
Is a light emitting section (transmitting section) provided on both front and back curtain surfaces near both ends of the smoke detector 20, and is connected to the smoke detector 20. When the shutter curtain 2 is fully opened, this light emitting section is provided.
21 is positioned so as to face the light receiving portion 22 provided on the surface of the ceiling 4a. Then, when the shutter curtain 2 is fully opened, a fire occurs, and the smoke accumulates along the surface of the ceiling 4a, and when the smoke detector 20 senses this, the detection signals are respectively on the front and back surfaces of the seat plate 2a. A certain light emitting portion 21 transmits the light, and the transmitted sensing signal is received by the light receiving portion.
Although the light is received by 22, the smoke is not detected if there is a large amount of smoke or dust on the side of the fire that does not reach the light receiving unit 22. Since it becomes the same and is inconvenient, a light emitting portion and a light receiving portion are provided on both sides of the shutter curtain 2 so that even if the light emitting signal of either one is blocked by smoke or the like, the signal can be reliably transmitted by the other side. We are considering to receive it. Then, this signal received by the light receiving unit 22 is input to a controller (not shown), and the controller
Based on the input of the sensing signal, a DC starting signal is output to the brake releasing device 10 as a brake releasing signal.

On the other hand, the brake release device 10 that receives the brake release signal
The pulley 14 is attracted to the attracting plate 13 side by the operation of the electromagnetic clutch 12 and rotates together with the DC geared motor 11, and the brake 7
By pulling the wire 18 connected to the winding direction in the winding direction, the braking of the brake 7 is released by this, and the shutter curtain 2 is automatically lowered by its own weight.
The rotation of the motor 11 is stopped by the operation of the micro switch 17 which is set in advance on the pulley 14, but the pulley 14 is also stopped at that position without being reversely rotated by the action of the ratchet gear 15. When the activation signal from the smoke detector 20 disappears or is interrupted, the electromagnetic clutch 12 loses its magnetic force, the suction plate 13 separates from the pulley 14, the pulley 14 becomes free rotation, and it is provided on the brake 7 side. The wire 18 is automatically pulled by an ammunition machine (not shown) so that the shutter brake returns to the braking state. That is, in the smoke non-sensing state, the brake releasing device 10 automatically keeps the brake always in the braking state.

In the embodiment of the present invention constructed as described above, when a fire occurs when the shutter curtain 2 is fully opened and the smoke is detected by the smoke detector 20, the brake release device 10 is activated as described above.
Automatically releases the brake to release the brake 7, and the shutter curtain 2 descends by its own weight.
When the smoke detector 20 drops below the smoke stagnation position and no smoke is detected, the brake release device 10 automatically returns and 7 is activated again to bring the brake into a braking state.
Will be stopped, and the evacuation of people will be completed in the meantime.

As described above, in the case where the present invention is implemented, the shutter curtain 2 can be automatically lowered and controlled according to the amount of smoke, but The descent control is not performed by directly actuating an opening / closing device as in the conventional case, but the shutter curtain 2 is lowered by its own weight, and a brake release device 10 for releasing a brake 7 for braking the descent is provided. It is assumed that it is started by the battery, not the indoor wiring for the switchgear, and that the smoke detector 20 automatically detects the smoke when the smoke sensor 20 detects smoke, so it is assumed that a temporary power failure has occurred. Also, the descent control of the shutter curtain 2 can be surely performed according to the smoke amount. Therefore, not only the safety in case of a fire, but also the fireproofing and smokeproofing can be greatly improved.

Moreover, since this device adopts a wireless system in which the smoke detection in the seat plate 2a part is transmitted to the 10 side, the wiring in the part of the shutter curtain 2 which is opened and closed is unnecessary, and therefore the structure is remarkable. Can be simplified.
Moreover, the light transmission means (light emitting part 21 and light receiving part 22) for wirelessly transmitting the smoke detection signal are provided on both front and back curtain surfaces of the shutter curtain, and one of the fire starting side is abnormal. Even if the transmission is impossible due to the occurrence, it is possible for the other side to still work effectively, and it is possible to effectively avoid that the shutter curtain 2 is lowered too much based on smoke detection and hinders the evacuation. Therefore, double security can be ensured.

The present invention is not limited to the above embodiment,
The transmission medium of the sensing signal is not limited to light, and it is possible to adopt a radio system such as radio waves, electromagnetic waves, sound waves, and ultrasonic waves.The brake release device is activated by receiving power from the battery. Any means can be used as long as the brake is released in conjunction with smoke detection.

[Advantages] In short, since the present invention is configured as described above, when a fire occurs, the brake is released in conjunction with the smoke detection of the smoke detector, and the shutter curtain falls by its own weight. Then, when it descends to a place without smoke, the smoke is no longer sensed and the brake is applied again to stop the descent, and the descent control of the shutter curtain can be automatically controlled according to the amount of smoke.

Moreover, the automatic lowering control with this smoke amount is that the brake release device is started by using the battery as a power source, and the shutter curtain descends by its own weight as the brake is released. Even if the power failure occurs, it can be performed regardless of the power failure, and accordingly, there is no problem that the power failure causes the power supply to remain closed in the half-open state.

Moreover, since the smoke detection signal is transmitted by a wireless system, wiring is not required on the surface of the shutter curtain that opens and closes like a wired transmission, and the configuration can be simplified. Even if the transmitter and receiver for configuring the wireless system are arranged on the front and back curtain surface sides, respectively, and even if the wireless transmission is interrupted due to an abnormality on the fire occurrence side, the other side The wireless transmission is maintained, and the automatic descent control corresponding to the amount of smoke can be maintained for a long time while transmitting the smoke detection signal by the wireless system. The possibility can be maintained as much as possible, and not only the safety but also the fireproofing and smokeproofing can be greatly improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of an automatic closing device for a smoke-proof shutter according to the present invention. FIG. 1 is a perspective view of a main part of the smoke-proof shutter with a ceiling portion and a part of a case cut away. FIG. 3 is a vertical sectional view showing a seat plate and a ceiling portion, and FIG. 3 is an internal front view of the brake releasing device. In the figure, 1 is a smoke-proof shutter, 2 is a shutter curtain,
2a is a seat plate, 4a is a ceiling part, 6 is a switch, 7 is a brake, 10 is a brake release device, 21 is a light emitting part, and 22 is a light receiving part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 Bunka Shatter Co., Ltd. 3-26-4 Shimura, Itabashi-ku, Tokyo (72) Inventor Yoshiharu Kosaka 2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industrial Co., Ltd. (72) Inventor Seiichi Ohno 1-4-1 Higashitabata, Kita-ku, Tokyo Komata Shyatsuta Industry Co., Ltd. (72) Inventor Masahiro Karai 1-4-1 Minami-Otsuka, Toshima-ku, Tokyo No. Suzuki Shutter Industry Co., Ltd. (72) Takeshi Ogawa 1-12, Ryogae-cho, Higashi-ku, Osaka-shi, Osaka Prefecture Nihon Life Tanimachi Building Toyo Shatter Co., Ltd. (72) Toshifusa Kamada Tagawa, Yodogawa-ku, Osaka-shi, Osaka 3-24 Kita, Japan Shutter Manufacturing Co., Ltd. (72) Inventor Kosuke Inamura 3-26-4 Shimura, Itabashi-ku, Tokyo Bunka Shutter Co., Ltd. (56) References JP-A-55-59290 (JP, A) JP-B-61-19793 (JP, B2)

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A smoke-proof shutter in which a shutter curtain that opens and closes based on the drive of an opening and closing mechanism is configured to be lowered by its own weight by releasing a brake, and a smoke detecting smoke is provided at a lower end portion of the shutter curtain. A shutter and a shutter case for accommodating the shutter curtain while providing a detector and a transmitter arranged to transmit a detection signal from the smoke detector as a radio signal from both front and back curtain surfaces of the shutter curtain. On the side of the body where is provided, a pair of receiving units that respectively receive signals from the respective oscillators,
A controller that outputs a brake release command based on the reception of a smoke detection signal from any one of the receivers, and a brake release device that is activated by a battery power supply and that releases the brake based on the brake release command from the controller. An automatic closing device for a smoke-proof shutter, characterized by being configured with.