JP2001037899A - Fireproof sheet shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively cut off a flame and smoke while easily securing an evacuating opening part by extending an auxiliary sheet being deformable by a temperature rise at fire time and sandwiching an end part of the other sheet body together with one sheet body along the end part of the other sheet body on one sheet body for forming a superposing part. SOLUTION: At ordinary time, an auxiliary sheet 7 is folded back in the center, and is wound on a winding shaft 1 in a double ply state. While, at fire time, a screen 2 composed of first/second sheet bodies 3, 4 is delivered by receiving a fire signal to close an opening part, and at the beginning, the auxiliary sheet 7 exists in a position separate from a right end part 3a of the first sheet body 3 still in a double ply state. Thus, the first sheet body 3 can be push-opened by hand so that an evacuating opening part S can be easily formed. However, when an ambient temperature rises, a sheet belt 8 expansively opens by restoring force of the auxiliary sheet 7, and an end part of the first sheet body 3 is sandwiched by the auxiliary sheet 7 and the second sheet body 4 to cut off the outflow of a flame and smoke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof sheet shutter in which an evacuation opening is formed in a screen for closing the opening.

[0002]

2. Description of the Related Art In recent years, in place of steel fireproof shutters,
The adoption of a sheet shutter using a non-combustible sheet such as silica fiber as a fireproof sheet shutter has been studied. In the case of a steel fire shutter, it is necessary to secure an evacuation opening by making a part of the opening a sleeve door, but in the case of a fire sheet shutter, for example, it extends upward from the lower end of a screen (shutter curtain). An evacuation opening is formed by providing a slit portion that protrudes, overlapping left and right sheets of the slit portion to close the slit portion, and turning one of the left and right sheets. .

[0003]

However, since the sheet is flexible and relatively lightweight, there is a gap between the overlapping portions of the left and right sheets due to a temperature difference or a pressure difference (before and after the screen) during a fire. There was a risk of flame and smoke leaking. The present invention has been created to solve such a problem, and it is possible to easily secure an evacuation opening at the time of evacuation, but after evacuation is completed after an evacuee passes through the opening. Even if the fire spreads and the temperature in the vicinity of the seat shutter rises, there is no gap in the evacuation opening (sheet overlap portion), and the fire-prevention sheet shutter can effectively prevent the leakage of flame and smoke. The purpose is to provide.

[0004]

In order to solve the above-mentioned problems, the technical means adopted by the present invention is to provide a screen for closing an opening inside a building, at least two sheets having their widthwise ends overlapped with each other. A fireproof sheet shutter comprising a body, wherein at the time of closing, at least a part of at least one of the sheet bodies is opened with the polymerization portion as a door end side to form an evacuation opening in the screen, An auxiliary sheet that deforms due to a rise in temperature in the event of a fire and that sandwiches the end of the other sheet together with the one sheet is formed along one end of the other sheet along the edge of the other sheet. It is characterized by being extended.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the present invention will be described with reference to FIGS. A wind-up shaft 1 extending in the left-right direction is suspended above an opening inside the building serving as a fire prevention section, and a screen made of a fire-resistant sheet (silica fiber sheet) is driven by forward / reverse drive of the wind-up shaft 1. The opening 2 is opened and closed while being guided at both left and right ends by guide rails 12 erected on the left and right sides of the opening.
In normal times, the screen 2 is wound around the winding shaft 1 and the opening is open. However, in the event of a fire, the brake device of the switchgear 13 is released in response to a fire signal from a fire alarm (not shown). Then, the screen 2 is lowered while being fed out from the winding shaft 1, and the opening is completely closed to partition and shut off the fire side and the non-fire side. In FIGS. 1A and 2A, the front side (front side) of the screen 2 is assumed to be a non-fire side (evacuation side), and the back side (facing side) is assumed to be a fire side.

The screen 2 has a rectangular sheet (substantially corresponding to an opening) formed by cutting a lower right portion of a rectangular sheet into a vertically long rectangular shape.
It is formed from a sheet member 3 and a second sheet member 4 sewn by abutting from the back side so as to close the cutout portion.
Then, the left end portion 4a of the second sheet member 4 and the first sheet member 3
And the right end 3a of the notch overlaps slightly wide (approximately 20 cm in the present embodiment) to form an overlapped portion J. In the overlapping portion J, only the upper portion is sewn, and the lower portion is not sewn at a height necessary for a person to pass through, but merely overlaps sheet ends. Incidentally, the first sheet body 3 and the second sheet body 4 are manufactured by cutting and sewing a refractory sheet having a fixed width to an appropriate width and length.
In (a) and the like, a portion indicated by a two-dot chain line on the screen 2 is a sewing portion. A plurality of retaining members 2a are provided at left and right ends of the screen 2 at predetermined intervals in the height direction.
Is installed. The retaining member 2a is the guide rail 1.
The opening 2 has a size larger than that of the opening groove, and prevents the end of the screen 2 from coming out of the guide rail 12. 12a is a gap prevention sheet 12a provided in the guide rail.

At the lower end of the screen 2 (ie, at the lower ends of the first sheet body 3 and the second sheet body 4), there is provided a seat plate 5 extending over the entire opening width. The seat plate 5 has a substantially inverted T-shaped cross section from the rising portion 5a and the flat portion 5b, is connected to the lower end of the seat via the rising portion 5a, and the lower surface of the flat portion 5b when the opening is fully closed. Is to come into contact with the floor. The lower ends of the first seat body 3 and the second seat body 4 are both mounted on the seat plate 5 via the rising portions 5a, but are the rising portions of the seat plate located at the lower end of the first seat body 3, Only a predetermined dimension L in the width direction from the polymerization site J is
The rising portion 5a is notched, and an individual seat plate 6 is provided in the notch. The individual seat plate 6 has a superposed portion J
The other end of the seat plate 5 is connected via a stainless steel spring plate 6b.
Is mounted to be swingable.

FIG. 1B is a plan view of a portion of the screen 2, and white arrows indicate assumed evacuation directions. The screen 2 has the second sheet member 4 on the fire side,
The sheet members 3 are set so as to overlap each other with the non-fire side (evacuation side). The lower end of the first sheet member 3 is independent of the seat plate 5 by the length having the individual seat plate 6, and when the evacuation is performed, the overlapping portion side of the first sheet member 3 is pushed open to put the overlapping portion J on the door side. The evacuation opening S can be secured.

Further, the second sheet member 4 includes the overlapping portion J
, An auxiliary sheet 7 is attached along the right end 3a of the first sheet body 3. The auxiliary sheet 7 has a vertically long sheet band 8 made of silica fiber, and a front surface of the sheet band 8,
It is composed of an operating piece 9 fixed at appropriate intervals in the vertical direction (using appropriate means such as a stainless steel wire or a rivet, not shown). The operating piece 9 is a horizontally long rectangular flat plate made of a shape memory alloy, and maintains its shape by being plastically deformed when an external force is applied thereto at normal temperature. The angle is set at 90 degrees.). The left end of the sheet band 8 covers the right end 3a of the first sheet body 3 when the sheet band 8 is expanded, and the right end 3a is folded when the two sheets are folded at the center in the width direction.
The right half from the center in the width direction is sewn to the second sheet member 4 using a stainless wire or the like at a position away from the second sheet member 4.

In the fireproof sheet shutter constructed as described above, the auxiliary sheet 7 is wound around the winding shaft 1 in a state of being folded back at the center in a normal state, and receives a fire signal in the event of a fire. The screen 2 is fed out to close the opening, but immediately after the closing, until the ambient temperature rises, the auxiliary sheet 7 remains in a two-layered state and is separated from the right end 3a of the first sheet body 3. Yes, the first sheet member 3 can be pushed open from the back side (fire side) by hand to easily form the evacuation opening S. However, when the fire spreads and the temperature around the fire prevention sheet shutter rises, the auxiliary sheet 7 is deformed (the operation piece 9).
Is restored to the original shape (flat plate), and the sheet band 8 is expanded by the restoring force. 2), the right end 3a of the first sheet member 3 is sandwiched between the auxiliary sheet 7 and the second sheet member 4. As a result, even if a temperature difference or a pressure difference occurs due to a fire before and after the screen 2, the right end 3 a of the first sheet body 3 (a portion that is also a overlapping portion and also close to the door) is sandwiched between the front and rear. There is no easy opening,
Flame and smoke can be effectively prevented from leaking (compared to a conventional structure in which an opening through which the fire side can be directly seen may be formed even if the door side is slightly opened). Further, since the operating pieces 9 made of a shape memory alloy are provided at intervals in the height direction, there is no problem when the screen 2 is wound around the winding shaft 1. .

FIGS. 6A to 6F show other embodiments 2 to 4, and the same components as those in the first embodiment are denoted by the same reference numerals. FIGS. 6A and 6B
In the second embodiment described in (c), the auxiliary sheet 7
Is sewn on the back side of the first sheet body 3 along the left end 4a of the second sheet body 4 (the left and right sides in the width direction are described as viewed from the front side according to the first embodiment). In addition, when the auxiliary sheet 7 is folded back at the center and the two sheets are overlapped, the operation piece 9 is attached so as to be positioned outside the sheet band 8. In the second embodiment, since the operating piece 9 is mounted so as to be exposed on the fire side (the back side of the screen), the operation (deformation) sensitivity is improved by directly receiving the heat from the fire, and after the operation, Seat belt 8
(It is made of silica fiber and has heat shielding properties.) It is suitable because it is concealed and is not directly exposed to a flame.

In the third embodiment shown in FIGS. 6D and 6E, the first and second embodiments are different from those of the first embodiment.
Silicone foaming agents 3e, 4e are applied to overlapping portions J of sheet bodies 3, 4.
Were alternately displaced so as to mesh with each other during foaming. As a result, in the event of a fire, the right end 3a of the first sheet body is not only sandwiched between the second sheet body 4 and the auxiliary sheet 7, but also the overlapped portion J is formed with a foamed silicone foaming agent 3e, 4e. By doing so, it is possible to prevent leakage of flame and smoke.

In the fourth embodiment shown in FIG. 6 (f), silicon foaming agents 3h and 3k are attached to both surfaces of the first sheet body 3 by sewing or the like with respect to the first embodiment. Things. The first sheet body extends vertically in a position near the left end 4a of the second sheet body 4 on the back side and a position near the front end of the expanded auxiliary sheet 7 on the front side. I have. As a result, the decision structure of the overlapping portion J on the door end side of the evacuation opening is strengthened, and the leakage of flame and smoke can be further prevented.

In a fifth embodiment shown in FIG. 7, the upper portion of the auxiliary sheet 7 is formed to be wide and the lower portion thereof is formed to be inclined so as to be narrower. When the body 3 is opened, the first sheet body 3 is smoothly closed. Note that the present invention is not limited to these embodiments, and may be implemented by appropriately combining these embodiments. In the first embodiment, the operating piece 9 is operated (deformed) with high sensitivity when the temperature rises, for example, the second operating piece 9
A hole may be formed in the sheet member 4 at a position on the back surface of the operation piece 9 so that a part of the operation piece 9 may be exposed on the back surface side of the screen 2.

According to the present invention, the opening for evacuation can be easily secured by opening the overlapped portion of the sheet member constituting the screen as the door tip side, but when the fire spreads, Since one sheet end forming the overlapped portion is sandwiched between an auxiliary sheet that is operatively deformed due to a rise in temperature at the time of fire and another sheet end to form a decision structure, flames and smoke are effectively prevented. Can be.

[Brief description of the drawings]

FIG. 1A is a front view of a fire prevention sheet shutter before an auxiliary sheet is deformed due to a temperature rise in a fire. (B) A plan view of a screen portion. (A-A view)

FIG. 2A is a front view of a fire prevention sheet shutter after an auxiliary sheet is deformed due to a rise in temperature during a fire. (B) A plan view of a screen portion. (A-A view)

FIG. 3 (a) is an enlarged front view of an auxiliary sheet portion of FIG. 2 (a). (B) The top view of an auxiliary sheet part.

FIG. 4 is a perspective view of a seat plate portion when a first sheet body is pushed open to form an evacuation opening.

FIG. 5A is a horizontal sectional view of a guide rail portion. (B) Front view in which a part of the guide rail portion was broken.

FIG. 6A is a rear view before the auxiliary seat mounting portion according to the second embodiment is operated (deformed). (B) The auxiliary sheet mounting portion of the second embodiment is operated (deformed).
FIG. (C) The auxiliary sheet mounting portion of the second embodiment is operated (deformed).
FIG. (D) A plan view before the operation (deformation) of the auxiliary sheet and the silicone foaming agent mounting portion of the third embodiment. (E) A plan view after the operation (deformation) of the auxiliary sheet and the silicone foaming agent mounting portion according to the third embodiment. (F) A plan view after the operation (deformation) of the auxiliary sheet and the silicone foaming agent mounting portion of the fourth embodiment.

FIG. 7 is an overall front view of a fire prevention sheet shutter after an auxiliary sheet operation (deformation) according to a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding shaft 2 Screen 3 1st sheet 3a Right end of 1st sheet 4 2nd sheet 4a Left end of 2nd sheet 7 Auxiliary sheet 8 Sheet strip 9 Working piece

Claims (1)

[Claims] 1. A screen for closing an opening inside a building is composed of at least two sheet members whose widthwise ends are overlapped with each other, and at the time of closing, at least a part of at least one of the sheet members is overlapped. In a fire prevention sheet shutter in which a part is opened as a door end side to form an evacuation opening in the screen, one sheet forming the overlapped part is deformed due to a rise in temperature during a fire, and A fire sheet shutter, characterized in that an auxiliary sheet for holding an end of the sheet member together with the one sheet member extends along an end portion of the other sheet member.