JP2001079105A - Fire-and smoke-proof shutter sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-and smoke-proof shutter sheet which is arranged in a wide space, is easily installable in spite of long or large size and is capable of holding a shielding state from the wind pressure and high temperature by a fire and preventing a fire spread and the diffusion of smoke. SOLUTION: Plural flat bars 4 and 5 for weights are mounted to both sides at the floor surface side end of a refractory sheet 2 so as to be held by having prescribed spacings 6 and 7 in a longitudinal direction and at this time, the prescribed spacings 6 of the flat bar 4 on one flank and the prescribed spacings 7 of the flat bar 5 on the other flank are position to offset from each other. Further, the flat bars 4 and 5 are bored with long holes. The plural flat bars 4 and 5 are mounted to both sides at the floor surface side end of the refractory sheet 2 by fastenings which freely slide in the long holes. As a result, the fire and smoke shutter, which is easily installable, is made easier to resist the deformation by accompanying the wind pressure and temperature elevation by the fire, maintains the shielding state and is capable of preventing the fire spread and the diffusion of the smoke, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a weight to a fireproof sheet installed under a ceiling or a beam, hanging the fireproof sheet by a weight when necessary in the event of a fire, shielding an internal space of a building structure, etc. The present invention relates to a fireproof and smokeproof shutter for preventing the spread of fire and diffusion of smoke.

[0002]

2. Description of the Related Art As means for preventing smoke or flame from being spread at the time of a fire inside a building structure or the like, a fireproof and smokeproof shutter using a fireproof sheet such as a glass cloth is known. The basic structure of the fire and smoke shutter 50 is shown in FIG.
As shown in the figure, a fireproof sheet 52 with a weight 51 attached to the ceiling or under a beam is installed so as to be able to hang down on the floor surface, and when a fire or the like is necessary, for example, smoke or a room temperature above a predetermined temperature is detected or manually. In addition, the fireproof sheet 52 is suspended from the ceiling or under the beam by the weight 51 on the floor surface to shield an internal space such as a building structure. The weight 51 of the refractory sheet 52 further prevents the refractory sheet 52 from being turned up by wind pressure generated during a fire.

As the weight 51 attached to the refractory sheet 52, a single round bar or flat bar is usually used. However, Japanese Patent Application Laid-Open Nos. 9-203281 and 10-33705 disclose divided weights. In the former, there is a description that a lower end of a refractory sheet is made into a bag shape and a weight of a divided round bar is inserted therein. In addition, the latter fire prevention and smoke prevention shutter 50a is provided with a slit portion 53 in the fireproof sheet 52 vertically so that a person who has lately escaped does not have to lift and lift the fireproof sheet 52 together with the weight 54. The weight 54 is divided accordingly, since it can be pushed and evacuated. That is, as shown in FIG.
Except for the left and right portions adjacent to the slit 53 of the refractory sheet 52, the main weight bar 5 is provided at the lower end of the refractory sheet 52.
5 and 56 are attached in the horizontal direction, and sub weight bars 57 and 58 are attached to the left and right portions. And
After the evacuation, the gravity of the sub-weight bars 57 and 58 closes the slit 53 to prevent the spread of fire and the spread of smoke.

[0004]

Recently, in a fireproof and smokeproof shutter arranged in a large space such as a library, a hall, a warehouse or a factory, the length L in FIGS.
Those that extend beyond 0 m may be required. Naturally, such a fireproof and smokeproof shutter requires a long weight. However, with the structure of the weight 51 in the fireproof and smokeproof shutter 50 of FIG. 8, it is difficult to carry it to the installation location itself, and the installation work is not easy. Further, when exposed to a high temperature, the weight 51 is deformed and a gap is formed between the refractory sheet 52 and the floor surface, making it difficult to effectively prevent fire spread and smoke diffusion.

[0005] In the above-mentioned publication, although the weight is divided, the installation work becomes easy. However, the divided part is deformed so as to be bent by wind pressure at the time of fire, and a gap is formed at both ends of the divided part and the fireproof sheet. . Therefore, it is difficult to effectively prevent the spread of fire and the spread of smoke.

Accordingly, it is an object of the present invention to easily install even a large-sized one arranged in a large space, and to prevent a decrease in holding power of a shielded state due to wind pressure or temperature rise due to a fire. Another object of the present invention is to provide a fire and smoke prevention shutter that can effectively prevent the spread of fire and the spread of smoke.

[0007]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, a plurality of weight bar members are provided on both sides of the floor side end portion of the fireproof sheet at predetermined intervals in the longitudinal direction. It is attached so as to sandwich it, and at this time, the predetermined interval of the bar member on one side and the predetermined interval of the bar member on the other side are alternately positioned, a long hole is opened in the bar member, and the inside of the long hole is slid freely. If multiple bar members are attached to both sides of the floor side end of the fire-resistant sheet with fasteners, it will be easy to install the bar member that will be the weight of the fire-resistant sheet, and will be resistant to deformation due to wind pressure and temperature rise due to fire. It has been found that the present invention can be easily performed, and the present invention has been completed.

That is, according to the first aspect of the present invention, a fireproof sheet is installed below a ceiling or a beam so as to be able to hang down on the floor, and the fireproof sheet is hung down on the floor when a fire or the like is required. In a fireproof and smokeproof shutter for shielding an internal space, a plurality of weight bar members are attached to both sides of a floor side end portion of the fireproof sheet so as to be sandwiched at predetermined intervals in a longitudinal direction, and a bar member on one side surface And a predetermined interval between the bar members on the other side is alternately positioned. By adopting such a configuration, the bar member is divided into a plurality at the time of installation, so that it can be dividedly carried in and installed, and after the installation, since the plurality of bar members are integrated, the There is no gap between the fire-resistant sheet and the floor or wall surface.

According to a second aspect of the present invention, the plurality of weight bar members are provided with long holes, and the plurality of bar members are attached to the fire-resistant sheet by fasteners which slide freely in the long holes. An object of the present invention is to provide a fireproof and smokeproof shutter attached to both sides of a floor side end. By adopting such a configuration,
In addition to the above functions, deformation such as warpage or thermal expansion caused by high heat due to fire is absorbed by fasteners that slide freely in the long holes, so that no gap is generated between the fireproof sheet and the floor or wall surface .

[0010] Further, according to the invention of claim 3, the fastener comprises:
A fire / smoke / shutter provided by positioning the plurality of bar members for weight at an outer end portion of a long hole of the plurality of weight bar members at normal temperature, and attaching the plurality of bar members to both floor-side end portions of the fireproof sheet. It is. By adopting such a configuration, in addition to the above function, a thermal expansion caused by high heat due to a fire is absorbed, so that no gap is generated between the fireproof sheet and the floor surface. Further, since the bar member is integrated, it does not extend any further, so that the fireproof sheet does not bend.

Further, the invention according to claim 4 provides a fireproof and smokeproof shutter in which the plurality of weight bar members are housed in a bag-like material attached to both sides of the fireproof sheet on the floor side end. Is what you do. By adopting such a configuration, a plurality of bar members can be housed and attached to the bag-like material, which facilitates construction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a fireproof and smokeproof shutter according to an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing a fireproof and smokeproof shutter according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an installation state of the fireproof and smokeproof shutter according to an embodiment of the present invention, and FIG.
FIG. 2 is an enlarged perspective view of the lower part of the fire and smoke prevention shutter of FIG. In the figure, a fireproof smokeproof shutter 1 is installed under a ceiling or under a beam, and when a fire or the like is required, a fireproof sheet 2 is guided by a guide 3 from below the ceiling or under a beam by its own weight or weight, and hangs down on the floor. Shields the internal space of things. The refractory sheet 2 is wound up and down by a winding device (not shown). The fireproof sheet 2 of the fireproof and smokeproof shutter 1 has a plurality of flat bars 4 and 5 for weights mounted on both sides of the floor side end portion thereof so as to sandwich the flat bars 4 and 5 at predetermined longitudinal intervals 6 and 7, and At this time, the predetermined interval 6 of the flat bar 4 on one side and the predetermined interval 7 of the flat bar 5 on the other side are alternately positioned.

The refractory sheet 2 is made of a non-combustible, refractory material such as a woven glass fiber cloth or silica cloth. The method of attaching the plurality of flat bars 4 and 5 on both sides of the floor side end of the fireproof sheet 2 is as follows. That is, the long holes 4a are formed at the longitudinal ends of the flat bars 4, 5.
5a is provided, and the fastener 10 is slidably secured in these long holes 4a, 5a and attached. In this embodiment, the fastener 10 is constituted by a bolt 11 and a nut 12, and the bolt 11 is sequentially passed through the long hole 4a of the flat bar 4, the hole 2b formed in the refractory sheet 2, and the long hole 5a of the flat bar 5. By tightening 12, a plurality of flat bars 4, 5 can be attached to both sides of the floor side end of the refractory sheet 2. And although the flat bars 4 and 5 for weights have predetermined intervals 6 and 7, they are formed as if they were one weight bar. The nut 12 may be tightened as long as the bolt 11 can slide in the long holes 4a, 5a of the flat bars 4, 5. Therefore, as shown in FIG. 4, the screw 11a of the bolt 11 is partially cut. In this embodiment, the fastener 10 includes a bolt 11 and a nut 12,
The present invention is not limited to this, and may have another structure having the same effect.

The fastener 10 is positioned at the outer ends of the long holes 4a and 5a of the plurality of flat bars 4 and 5 at normal temperature. A plurality of flat bars 4 and 5 are attached to both sides of the unit. With this configuration, the fastener 10 slides and absorbs the thermal expansion (extending in the direction of the arrow A in FIG. 3) generated by the high heat due to the fire in the long holes 4a, 5a, and the flat bars 4, 5 are warped. Prevent deformation. Therefore, there is no gap between the fireproof sheet 2 and the floor. Further, by providing the flat bars 4 and 5 with the predetermined intervals 6 and 7, it is possible to cope with deformation due to thermal expansion.
There is no damage to the portion fixed by 1 or bolt 11, and the refractory sheet 2 does not bend.

The flat bars 4 and 5 need to have a sufficient weight to allow the fireproof sheet 2 to hang down from the ceiling or under the beam where the fire bar is installed in the event of a fire. It is necessary to have a weight that does not allow the 2 to roll up easily. However, if the weight is too high, a person who has escaped may not be able to evacuate.

FIGS. 6 and 7 show another mounting method of the flat bars 4 and 5 for the plurality of weights.
That is, the bag-like material 20 is attached to both sides of the floor side end portion of the refractory sheet 2, and the bag-like material 20 has slits 2.
1 are formed, and the flat bar 4 is formed from the slit 21.
5 is stored in the bag 20. Since the flat bars 4 and 5 are held in that state, the long holes 4 of the flat bar 4
a, the hole 2b of the refractory sheet 2 and the long hole 5a of the weight flat bar 4 can be relatively easily matched. Thereafter, the flat bars 4 and 5 can be attached to the refractory sheet 2 by passing the bolts 11 of FIG. According to this method, the working efficiency is extremely high. That is, if no bag-like material is provided, two workers with a flat bar and one bolt-fastening worker are required. However, since the flat bar can be easily inserted and held in the bag-like material, the number of workers is one. A person is fine. The appearance is also beautiful.

In FIG. 5 to FIG. 7, the end of the refractory sheet 2 on the floor surface side is formed into a bag-like shape 2a in order to eliminate a gap with the floor surface 22 and to prevent smoke from leaking. is there.

Next, a method for using the fire and smoke prevention shutter 1 in the above embodiment will be described. First, flat bars 4, 5, 5 for weight are placed on the fireproof sheet 2 of the fireproof smokeproof shutter 1.
Have predetermined gaps 6 and 7 in the longitudinal direction, and have long holes 4a,
It is positioned on the outer end side of 5a and attached with the fastener 10. Next, the fireproof and smokeproof shutter 1 is installed on the ceiling or under the beam at a position where the internal space of the building structure or the like is shielded. When a fire occurs, the locking state of the winding device (not shown) is automatically or manually released, and the fireproof sheet 2 hangs down from the ceiling or under the beam at the installation location due to the weight of the weight flat bars 4 and 5. To shield the internal space. In this state, the fireproof sheet 2 is in close contact with the floor surface 22 (see FIG. 4) and is in a closed state, so that the fire and smoke are blocked. The evacuees who have escaped late can turn up the flat bars 4, 5 and the fireproof sheet 2 to evacuate, and then re-enter the fireproof sheet 2 again.
Is in close contact with the floor surface 22 and is closed to shield the flame and smoke. As the fire progresses, the high temperature and the accompanying wind pressure strike the refractory sheet 2 and thermally expand the flat bars 4 and 5, but are prevented by the fasteners 10 and the predetermined intervals 6 and 7, and furthermore, the refractory sheet 2 is pressed and bent. However, the fireproof sheet 2 is not bent by the integrated flat bars 4 and 5, and the internal space of the building structure or the like is kept shielded, and the flame and smoke are shielded. After the fire has been extinguished, the structure of the fire and smoke shutter 1 is less likely to be deformed or warped. Therefore, it is expected that damage will be small, and if the damage to the entire building is small, the fire and smoke shutter 1 may be used again. it can.

In the present invention, as the bar member, other than the flat bar used in the above embodiment, for example,
Examples include an L angle having an L-shaped cross section and a C-shaped steel having a substantially C-shaped cross section.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to this. For example, a change without departing from the spirit of the present invention, such as providing an evacuation door on a fireproof sheet, etc. Additions are within the scope of the present invention.

[0021]

According to the first aspect of the present invention, the weight bar member is divided into a plurality of parts at the time of installation, so that the weight bar member can be divided and carried in and installed. After the installation, the plurality of bar members are integrated. Therefore, there is no bending deformation due to wind pressure caused by the fire, and no gap is generated between the fireproof sheet and the floor or wall surface. Therefore, it is easy to carry in and install, particularly, the width of the refractory sheet is large, and the effect is high when one bar member is too long, and the holding force of the shielded state due to the wind pressure or temperature rise caused by the fire is prevented from lowering. In addition, it is possible to effectively prevent the spread of fire and the spread of smoke after evacuation, while ensuring the evacuation of people.

According to the second aspect of the present invention, deformation such as warpage or thermal expansion caused by high heat due to a fire is absorbed by the fastener that slides freely in the long hole, and the fireproof sheet and the floor or wall face are connected to each other. There is no gap between them. Therefore, in addition to the above effects, since there is no deformation such as warpage or thermal expansion of the weight bar member, there is no decrease in the holding force of the shielded state due to the temperature rise,
Spread of fire and diffusion of smoke can be effectively prevented.

According to the third aspect of the present invention, not only the thermal expansion caused by the high heat due to the fire is absorbed and a gap is not formed between the refractory sheet and the floor surface, but also the weight bar member integrated by the wind pressure is provided. It does not extend any further and the refractory sheet does not flex. Therefore, in addition to the above effects, there is no reduction in the shielding state due to the bending of the refractory sheet, and it is possible to effectively prevent the spread of fire and the diffusion of smoke.

According to the fourth aspect of the present invention, if a plurality of weight bar members are housed in the bag-like material, the weight can be attached. Therefore, in addition to the above-mentioned effects, it becomes extremely easy to attach a plurality of bar members to the fireproof sheet, so that the work on site is reduced by that much, and the quality and cost of products can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a fire and smoke shutter according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an installation state of a fireproof and smokeproof shutter according to an embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a lower part of a fire and smoke shutter of FIG. 2;

FIG. 4 is a cross-sectional view showing a mounting state of a fastener constituting the fire and smoke prevention shutter of FIG. 2;

FIG. 5 is a sectional view of a lower portion of another fireproof sheet constituting the fireproof and smokeproof shutter according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing an attached state of another flat bar constituting the fire and smoke prevention shutter according to the embodiment of the present invention.

FIG. 7 is a perspective view showing an attached state of another flat bar constituting the fire and smoke prevention shutter according to the embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a perspective view showing a conventional example.

[Explanation of symbols]

 1, 50, 50a Fireproof and smokeproof shutter 2, 52 Fireproof sheet 2a Bag 3 Guide 4, 5 Flat bar (bar member) 4a, 5a Slot 6, 7, Predetermined interval 10 Fastener 11 Bolt 12 Nut 20 Bag 20 Slit 22 Floor 51, 54 Weight 53 Slit 55, 56 Main weight bar 57, 58 Sub weight bar

Claims (4)

[Claims] 1. A fire protection system in which a fireproof sheet is installed below a ceiling or a beam so that the fireproof sheet can be hung on a floor surface, and when a fire or the like is required, the fireproof sheet is hung on the floor surface to shield an internal space of a building structure or the like. In the smoke shutter, a plurality of weight bar members are attached to both sides of the floor side end portion of the fire-resistant sheet so as to be sandwiched at a predetermined interval in the longitudinal direction, and a predetermined interval between the bar members on one side and the other side are provided. A fire-and-smoke-proof shutter, characterized in that predetermined intervals of the bar members are located alternately. 2. A plurality of bar members for weight are formed with long holes, and the plurality of bar members are attached to both sides of a floor side end of the refractory sheet with a fastener which slides freely in the long holes. The fireproof and smokeproof shutter according to claim 1, which is attached. 3. The fastener is positioned at an outer end of a long hole of the plurality of weight bar members at normal temperature, and the plurality of bar members are attached to both sides of a floor side end of the fireproof sheet. The fire and smoke prevention shutter according to claim 2, wherein 4. The fire prevention device according to claim 1, wherein the plurality of weight bar members are housed in a bag-like material attached to both sides of a floor side end of the fire-resistant sheet. Smoke-proof shutter.