JPH09187524A - Fire spread preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire spread preventing device to be easily and inexpensive ly installed even in the building having no facility of water or at the section not covered with the piping of water. SOLUTION: A fire spread preventing device 1 is composed of a take-up device 2 installed at the upper part or lower part of the ceiling 15 of building, screen 3 to be usually taken up by the take-up device 2 but to be drooped onto near the floor 17 by being released from the take-up device 2 when a fire is generated, fire detector 4 installed on the ceiling 15 or walls 16, and control equipment 5 for operating the take-up device 2 when the fire detector 4 detects the generation of fire. The screen 3 is mainly composed of non- conbustible woven plane fabric woven by yarns composed mainly of ceramic fibers. The yarn is reinforced by a core wire and a reinforce wire. Since this screen 3 improves heat resistance and is not molten even when it is exposed on a fire 12, it is not necessary to make the screen wet by sprinkling water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing the spread of fire in a building.

[0002]

2. Description of the Related Art As a new device for preventing the spread of flames and smoke when a fire occurs in a building, a fire spread prevention device 50 as shown in FIG. 4 is considered. This fire spread prevention device 50 hangs a glass fiber screen 52 wound up by a winding device 51 from a ceiling 53 to a height of about 60 cm above a floor 54, and screens water 56 from a sprinkler 55 installed near the ceiling 53. It is configured to jet to 52 and wet the screen 52. The glass fiber screen 52 may melt if exposed to the flame 57 as it is, but if it is wet as described above, the temperature is 50 to 60 ° C. due to the cooling effect by evaporation of the water 56.
It does not melt because it is suppressed to. Also, the screen 52
Below that, the film of water 56 dripping from the lower end of the screen 52 blocks the passage of flame 57 and smoke 58.

[0003]

However, since the fire spread prevention device 50 requires the water 56 and requires the sprinkler 55 and the water pipe, there is a problem that the installation is troublesome and the cost is high. This problem was particularly remarkable when the fire spread prevention device 50 was to be installed in a building without water facilities or in a site where water pipes were not spread.

An object of the present invention is to solve the above problems and provide a fire spread prevention device which can be installed easily and inexpensively even in a building without water facilities or a site where water pipes are not spread. is there.

[0005]

In order to achieve the above-mentioned object, the fire prevention device of the present invention includes a winding device installed near the ceiling of a building and a winding device which is always wound around the winding device. A screen that is unwound from the winding device and hung down to the vicinity of the floor of the building when a fire occurs, the screen being made of a non-combustible woven fabric woven with a yarn mainly composed of ceramic fibers. .

Here, as the ceramic fiber which is the main constituent of the yarn, rock wool, slag wool, silica fiber, alumina-silica type fiber, alumina fiber and the like can be exemplified. 600
It is preferable that the temperature is not lower than ° C. Further, the yarn may contain a small amount of inorganic fibers other than ceramic fibers, organic fibers or metal fibers in order not to impair the heat resistance, in order to compensate brittleness and enhance flexibility and weavability. Good. Examples of this inorganic fiber include silica glass fiber and general glass fiber. Examples of the organic fibers include flame-retardant fibers such as flame-retardant fibers and aramid fibers, and non-combustible fibers such as carbonized organic fibers (for example, polyacrylonitrile fibers carbonized at about 60%). Examples of metal fibers include stainless fibers.

Further, in order to increase the tensile strength of the screen, it is preferable that the yarn is reinforced with a reinforcing linear body. Examples of the reinforcing linear body include inorganic fibers such as silica glass fibers, general glass fibers, and alumina fibers to be inserted into the yarn as core yarns, and metal wires such as stainless steel wires twisted with the yarn as the reinforcing wires. The thickness of the screen is preferably 0.5 to 5 mm, and more preferably 2 to 4 mm, which is thick so as to withstand the flame and to firmly block the flame and smoke and not be exposed to hot air. For that purpose, the yarn thickness is 200-1500.
A tex is preferable, and 40 is more preferable.
It is 0 to 600 tex. The type of yarn weaving is not particularly limited, and may be plain weave or twill weave, for example.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a fire spread prevention apparatus embodying the present invention. The fire spread prevention apparatus 1 is provided with a winding device 2 installed above or below a ceiling 15 of a building. Is taken up by the take-up device 2, and when a fire occurs, it is unwound from the take-up device 2 and hung down near the floor 17 of the building, and the fire detector 4 installed on the ceiling 15, the wall 16 and the like. The fire detector 4 includes a control device 5 that operates the winding device 2 when the fire detector 4 detects the occurrence of a fire. The winding device 2 includes a winding shaft 6 rotatably supported,
And a drive device 7 using a motor for driving the winding shaft 6 to rotate. As the fire detector 4, a temperature sensor, a smoke sensor, a gas sensor or the like is used alone or in combination, and the occurrence of a fire is detected by detecting a temperature rise, smoke, gas or the like.

As shown in FIG. 2, the screen 3 is made of a non-combustible woven fabric which is plain-woven with a yarn 8 mainly composed of ceramic fibers. This yarn 8 is, as shown in FIG.
Alumina-silica-based fibers as ceramic fibers are mixed with a small amount of silica glass fibers, and two single yarns 10 containing silica fibers as core wires 9 are twisted together with one stainless steel wire as reinforcing wire 11. It will be. The thickness of the yarn 8 is 500 tex,
The thickness of the screen 3 is about 3 mm.

Since the screen 3 is always wound around the winding shaft 6 of the winding device 2, the fire spread prevention device 1 is not bulky and can be easily installed in any building. When a fire occurs, the fire detector 4 detects the occurrence,
The control device 5 automatically operates the drive device 7 of the winding device 2 to unwind the screen 3 from the winding device 2 and hang it down to the vicinity of the floor 17. Since the screen 3 is mainly composed of ceramic fibers, it has excellent heat resistance and does not melt when exposed to the flame 12. Therefore, it is not necessary to sprinkle water to wet it as in the conventional example. For this reason, the sprinkler and the water piping which were required in the conventional example become unnecessary, and the labor and cost for installation can be reduced. Therefore, even in a building without water facilities or a site where water pipes are not spread, it can be installed easily and inexpensively.

Further, since the tensile strength of the screen 3 is increased by the core wire 9 and the reinforcing wire 11 included in the yarn 8, the screen 3 is not easily torn even if an external force is applied. Further, since the screen 3 is thick, the flame 12 and the smoke 13 are firmly blocked, and the screen 3 is not exposed to hot air.

The present invention is not limited to the configuration of the above-described embodiment, and can be embodied with appropriate modifications, for example, as follows, without departing from the spirit of the invention. (1) If the water piping is easy, a sprinkler may be installed to inject water onto the screen 3. (2) In place of or in addition to the driving device 7 of the winding device 2, a device for manually rotating and driving the winding shaft is provided.

[0013]

Since the fire spread prevention apparatus of the present invention is configured as described above, it can be installed easily and inexpensively even in a building without water facilities or a site where water pipes are not spread. It has an excellent effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fire spread prevention device according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a screen of the fire spread prevention device.

FIG. 3 is an enlarged front view of a yarn used for weaving the screen.

FIG. 4 is a cross-sectional view of a conventional fire spread prevention device.

[Explanation of symbols]

 1 Fire spread prevention device 2 Winding device 3 Screen 6 Winding shaft 7 Driving device 8 Yarn 9 Core wire 10 Single yarn 11 Reinforcing wire 15 Ceiling 17 Floor

Claims (2)

[Claims] 1. A winding device installed near a ceiling of a building, and a screen which is always wound by the winding device and unwound from the winding device when a fire occurs and hung down to near the floor of the building. And a screen made of a non-combustible woven fabric woven with a yarn mainly composed of ceramic fibers. 2. The fire spread prevention device according to claim 1, wherein the yarn is reinforced with a reinforcing linear body.