JP2002035152A - Fire-proof screen for construction work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-proof screen for construction work which can surely form a fire partition while being a fire-proof screen having a slit on the screen surface, wherein flames are prevented from going through from the slit at the time of a fire. SOLUTION: A plurality of sheets (4 and 5) (2a, 2b and 2c) are superposed, and the slit 6 is formed on the screen surface. Then, a shielding device (10) which erects from the screen surface and reduces a gap at the slit section at least at the time of a fire is provided on the sheet which is confronted with the slit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002] The present invention relates to a refractory screen having a slit formed on a screen surface, and more particularly to a refractory screen for buildings which minimizes the leakage of flame from a slit portion in a fire.

[0003]

2. Description of the Related Art Conventionally, a refractory screen in which a slit is formed on a screen surface is provided with a vertically long slit formed in the center of the screen so that a person can pass through the screen surface by spreading the slit in an emergency. In addition, there is a known one in which a plurality of sheets are arranged side by side in a staggered manner to form a series of screens, and the wide openings are closed by the screens. These refractory screens prevent the flame from leaking from the slit portion by overlapping the sheet on the back surface of the slit.

[0004]

However, since the refractory screen is made of a cloth material, the sheet is deformed due to a temperature difference or a pressure difference at the time of a fire and a gap is formed in the slit portion, and there is a possibility that the flame may leak from the gap. there were.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above-mentioned circumstances, and has been developed in consideration of the above circumstances. In a refractory screen device that is rewound from a drum and configured to completely close an opening, the refractory screen forms slits on the front and back surfaces by overlapping edges of adjacent sheets, and faces the slit. On the sheet,
At least in the event of a fire, a shielding device that protrudes from the sheet surface and shields a gap generated between the slit and the sheet is provided.

Further, the shielding device has a base end portion fixed to the sheet surface, and a shielding portion which is continuous from the base end portion and expands at a predetermined angle, wherein the shielding portion has a slit spaced from the sheet. In the process up to this point, it was configured so as not to protrude on the separation locus of the slit.

[0007] Further, the shielding device changes between an upright position in which the screen is always protruded from the screen surface when the screen is unfolded to cover the gap of the slit portion, and a prone position in which the screen is wound around the winding drum in a stacked state when the screen is stored. It is configured so that it can be seen.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. A fire-resistant screen is provided in a fire-prevention section of the building, and is wound around an upper surface of the fire-prevention section and rotatable forward and reverse. A screen 2 which is retracted from the winding drum in the event of a fire to completely close the opening, and guide rails 3 which stand upright on both sides of the opening.

In FIG. 1, a screen 2 is composed of a first sheet member 4 and a second sheet member 5 made of a fire-resistant material. When fully closed, the first sheet body 4 is formed by cutting a right side portion of a rectangular sheet corresponding to the size of the building opening from a lower end upward in a rectangular shape. The second sheet member 5 has a shape and dimensions corresponding to the rectangular notch formed in the first sheet member 4, and is formed of a rectangular sheet having an area slightly larger than the notch. I have.

[0010] The second sheet member 5 is applied so as to cover the notch formed in the first sheet member 4, and the first sheet member 4 is closed.
The peripheral edges 4a, 4b of the notch portion, the upper peripheral edge 5a, and the left peripheral edge 5b of the second sheet 5 are superimposed, and the peripheral edge 4a and the peripheral edge 5a are sewn together to integrate the two sheets. , Screen 2 are formed. By doing so, the slits 6 and 6 are formed in the overlapping portion of the first sheet 4 and the second sheet 5, respectively.

At the lower end of the screen 2 is provided a seat plate 7 extending over the entire opening width. The seat plate 7 includes a rising portion 8
And the flat portion 9 has a substantially inverted T-shaped cross section.
Further, the seat plate 7 is connected to the seat body 4 via the rising portion 8.
5, the right lower end 4c of the seat 4 is not connected to the seat plate 7 and is a free end. A flat weight bar 7a is attached to the right lower end 4c.

The screen 2 configured as described above
, A door screen 40 having the slit 6 and the lower right end 4c as open ends is formed. The door screen 40 is configured so as to form a triangular fire opening on the screen surface by being pushed open from the inside. Further, when the door screen 40 is closed, the side end of the door screen and the left end 5b of the second sheet 5 are overlapped, and the overlapping portion O
Are formed.

In the overlapping portion O, a shielding device 10 is attached near the end of the second sheet 5 so as to abut against the door end 40a (slit 6) of the door screen 40. The shielding device 10 includes an upright piece 11 that rises from the sheet surface in the event of a fire, and a cover body 12 that is linked to the upright piece 11. The upright piece 11 is made of a thin plate made of a shape memory alloy, and is fixed between the second sheet 5 and the cover body 12. Further, the cover body 12 is made of a fire-resistant sheet-like member, and has a base end portion 12a fixed to the second sheet 5 and a shielding portion 12b having a predetermined width continuously from the base end portion 12a. ing.

As shown in FIGS. 2 (a) and 2 (b), the shielding device 10 constructed as described above always has an upright piece 11 in a flat plate shape, and In the event of a fire, the standing piece 11 rises up so that the shielding portion 12b of the cover 12 protrudes in an expanded state. The cover body 12 is set so as not to overlap the door screen 40a in normal times. By doing so, the cover body 12 does not interfere with the turning trajectory of the door end portion 40a of the door screen in the process of being in the upright state, so that escape from the door screen can be facilitated.

The shielding device 10 is not limited to the above embodiment, and may be configured as shown in FIGS. 3A to 3C, for example. The shielding device 10 shown in FIG. 3A is an embodiment in which a standing piece 11 made of a shape memory alloy is covered with a cover body 12, and the shielding device 10 shown in FIGS. 7 shows an embodiment employing a foam material.
According to these embodiments, since the metal members are not directly in contact with the refractory screen, the durability of the screen can be improved without damaging the screen surface.

FIG. 4 shows a further embodiment of the shielding device 10. The upright piece 11 is made of a leaf spring formed by bending a rectangular steel plate, and is fixed to a sheet.
And the rising portion 11 forming a predetermined angle with respect to the seat surface
b. The upright piece 11 is attached between the seat 5 and the cover body 12 so that the shielding portion 12b of the cover body 12 always stands up from the seat surface.

The upper portion of the rising portion 11b is formed with a tapered portion 11c which is cut out so as to be inclined downward from the fixing portion 11a. When the screen 2 is wound up, first, the fixing portion 11a that does not project from the screen surface enters the entrance 14 of the screen formed by the magsa 13, and the tapered surface 11c slides on the lower surface of the magsa 13 when the screen 2 is wound. While being pulled into the entrance 14. At this time, the rising portion 11b passes through the entrance so as to be pressed against the sheet surface. In the ceiling, the rising portion 11b rises again from the sheet surface, but by winding the screen 2 around the winding drum 1, the rising portion 11b rises.
Is wound on the take-up drum by receiving the weight of the screen and the seat plate wound thereon and pressed against the outer peripheral surface of the take-up drum.

According to the fire-resistant screen according to this embodiment, when the screen is closed, the shielding device always projects from the screen surface. In addition, when stored, it can be wound around the winding drum in an orderly manner, so that the storage space can be made compact.

FIGS. 5A to 5D show another mounting example of the shielding device 10 and its shielding action. In (a), since the shielding device 10 is configured to rise in the same direction as the opening direction of the door 40a of the door screen, the shielding device 10 moves in the direction approaching the door portion 40a of the door screen as it rises. And the gap between them can be made smaller. In (b) to (d), the shielding device 10 is configured to be attached to both the door screen 4 and the screen 5. By doing so, the gap between the overlapping portions can be reduced, and the fire prevention function of the door portion can be made more reliable.

Next, a second embodiment will be described with reference to FIGS. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The refractory screen is provided with winding drums 1a, 1b, 1c suspended above an opening, and the winding drums 1a, 1b, 1c.
The screen 2 includes main screens 2a and 2b and a sub-sheet 2c that are wound around the opening c, and guide rails 3 that stand upright on both sides of the opening.

The winding drums 1a and 1b are connected between adjacent ends of both drums by a known means such as a coupling, and are shaft-mounted between both ends of the opening. One end of the non-connection end of both winding drums is connected to the output shaft of the switch, and is configured so that 1a and 1b can rotate integrally based on the drive of the switch. The auxiliary winding drum 1c is attached so as to face the winding drums 1a and 1b. The auxiliary winding drum 1c is provided with a coil spring therein and is constantly urged in the direction of winding up the sub-sheet 2c.

The screen 2 is composed of main sheets 2a and 2b arranged side by side at predetermined intervals and a sub-sheet 2c arranged so as to straddle between these two sheets. At both ends of the sub-sheet 2c, overlapping portions O formed so as to overlap with the main sheets 2a and 2b are formed. In the overlapping portion O, vertically long slits 6 are formed on the front and back surfaces of the screen. A seat plate 7 extending to the opening width is attached to the lower end of the screen 2 so as to integrate the lower ends of the main seats 2a and 2b and the sub seat 2c.

In the fire screen constructed as described above, the opening is opened by moving the main sheets 2a, 2b and the sub-sheet 2c up and down between the guide rails 3, 3 at the same time based on the operation of the switchgear. Or closed in the event of a fire to form a fire compartment.

In the overlapping section O, the main sheet 2
A shielding device 10 is attached to a and 2b so as to be adjacent to both ends (slits 6) of the sub-sheet. The shielding device 10 rises from the sheet surface in the event of a fire, and shields a gap generated between the main sheet and the sub-sheet, so that the flame does not leak to the evacuation road side. The description of the shielding device 10 is omitted because it is the same as that of the first embodiment.

FIG. 7 shows another mounting example of the shielding device 10 and its shielding action. (A) shows a mounting example in which the shielding device 10 stands up with the overlapping portion side as a fulcrum. (B) to (d) show examples in which the shielding device 10 is attached to the main sheets 2 and 2 and the sub-sheet 2. By doing so, it is possible to further improve the fire prevention performance of the overlapping portion.

[0026]

According to the present invention constructed as described above, in a refractory screen in which a slit is formed on the screen surface, even if a gap is formed in the slit portion at the time of fire, the shielding device rises from the screen surface. Since this gap is shielded, a sufficient fire prevention performance can be maintained without the flame leaking from the slit portion.

When the screen is fully closed,
Since the shielding device is configured to protrude from the screen surface, the gap between the slits can be shielded from the initial stage of the fire occurrence.

[Brief description of the drawings]

FIG. 1A is a schematic front view of a refractory screen, and FIG.
1 is a schematic cross-sectional view of a refractory screen.

FIGS. 2A and 2B are explanatory diagrams of an operation of the shielding device.

3 (a), 3 (b), 3 (c), and 3 (d) are operation sectional views of another embodiment of the shielding device.

FIG. 4A is an operation sectional view of another embodiment of the shielding device, and FIG. 4B is an operation explanatory view of an upright piece.

FIGS. 5 (a), (b), (c), and (d) are diagrams showing other examples of mounting the shielding device.

FIG. 6A is a front view of a refractory screen according to a second embodiment, FIG. 6B is a longitudinal sectional view, and FIG. 6C is a transverse sectional view.

FIGS. 7A, 7B and 7C are diagrams showing another example of mounting the shielding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c Winding drum 2 Screen 6 Slit 10 Shielding device 11 Standing piece 12 Cover body 12a Base end 12b Shielding part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norihisa Isemura 2-1-1 Nishi Shinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industrial Co., Ltd. (72) Inventor Toshio Gomi 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo No. 1 Sanwa Shutter Industry Co., Ltd. F term (reference) 2E184 EE12

Claims (3)

[Claims] 1. A fire-resistant screen which is wound back from a take-up drum mounted on a ceiling in a fire or the like to completely close an opening, wherein the fire-resistant screen overlaps an end of an adjacent sheet. While forming a slit on the front and back surfaces of the screen, the sheet facing the slit, at least in the event of fire, protruding from the sheet surface, a shielding device that shields the gap generated between the slit and the sheet A fireproof screen for buildings, characterized by being provided. 2. The shielding device has a base end portion fixed to a sheet surface, and a shielding portion continuous from the base end portion and expanding at a predetermined angle, wherein the shielding portion has a slit separated from the sheet. The architectural refractory screen according to claim 1, wherein in the process up to the step, the slit does not protrude to the separation locus of the slit. 3. The shielding device changes between an upright posture, which always projects from the screen surface when the screen is unfolded, to shield the gap of the slit portion, and a prone position, which is wound around the winding drum in a stacked state when the screen is stored. The architectural refractory screen according to claim 1, wherein the refractory screen is capable of being viewed.