JP2003135616A - Screen shutter for fire partition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen shutter for fire partition capable of preventing a weight or guides from deforming, and also capable of securely blocking a gap between a side on which a fire is occurred and an evacuation side. SOLUTION: The screen shutter 1 for fire partition is provided with a non- combustible or a fire-resistant screen 5 having flexibility, which descends from a ceiling 2 for partitioning inside of a building. The weight 7 contacting with a floor 4 is provided on a lower edge of the screen 5. The guides 16 are provided in the building for engaging with side edges of the screen 5 and guiding lowering operation of the screen 5. Thermally foaming fire-resistant layers P are formed on the weight 7 and the guides 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen shutter for a fireproof compartment, which can prevent a heat deformation of weights and guides and can surely close a gap connecting a fire occurrence side and an evacuation side.

[0002]

2. Description of the Related Art Conventionally, a screen shutter for a fireproof compartment has a flexible, noncombustible or fireproof screen curtain. This screen curtain
The interior of the building is partitioned by descending from the ceiling side and hanging down to the floor surface, thereby forming a fireproof section. By the way, since this screen curtain is flexible enough to be wound up, it is lifted by being agitated by the internal pressure and air flow that rises on the fire occurrence side, creating a gap with the floor surface to secure the necessary shielding performance. It may not be possible. Therefore, a weight is provided at the lower edge of the screen curtain in order to pull the screen curtain downward and stably secure the partition state.

Further, in the conventional screen shutter for fireproof compartment, in order to stabilize the descending operation of the screen curtain,
Both widthwise edges of the screen curtain are engaged in a guide provided on the wall so as not to slip out.

[0004]

In the conventional screen shutter for fireproof compartment, the weight at the lower edge of the screen curtain is made of steel. This steel weight is remarkably thermally deformed by being exposed to the temperature rise and flame on the fire generating side, which causes the fire generating side and the evacuation side between the lower edge of the screen curtain and the floor surface. However, there is a problem that a small gap is formed to communicate with each other. The guides that guide the side edges of the screen curtain were also made of steel, and even with this guide, there was a risk of causing a gap between the guide and the side edges of the screen curtain due to thermal deformation. .

The present invention was devised in view of the above-mentioned conventional problems, and prevents the heat deformation of the weights and guides, and reliably seals the gap that connects the fire occurrence side and the evacuation side. An object of the present invention is to provide a screen shutter for a fireproof compartment.

[0006]

DISCLOSURE OF THE INVENTION A screen shutter for a fireproof compartment according to the present invention is for a firebreak compartment provided with a screen curtain having a noncombustible or fireproof flexibility which is lowered from the ceiling side to partition the interior of the building. In the screen shutter, a weight to be grounded on the floor is provided at the lower edge portion of the screen curtain, and a thermally foamable fireproof layer is formed on the weight.

Further, the screen shutter for a fireproof compartment according to the present invention is a screen shutter for a firebreak compartment, which is provided with a screen curtain having a noncombustible or fireproof flexibility which is lowered from the ceiling side to partition the interior of the building. A guide for engaging the side edge of the screen curtain to guide the descending movement of the screen curtain is provided in the building, and a thermally foamable refractory layer is formed on the guide.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a screen shutter for a fireproof compartment according to the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the screen shutter 1 for a fireproof compartment according to the present embodiment is wound around a winding shaft 3 installed on a ceiling 2 so that the screen shutter 1 can be wound and wound, and the floor surface 4 is wound. A screen screen 5 having fireproof or noncombustible flexibility is provided that partitions the interior space S of the building by being hung down.

A slit Q is formed in the screen curtain 5 along the vertical direction, and an evacuation door 5a which is opened / closed with the slit Q as an opening / closing edge is formed. Further, the screen curtain 5 is provided with a cover curtain 6 overlapping with the screen curtain 5 to cover the slit Q. The cover curtain 6 is made of the same material as the screen curtain 5 and normally seals the slit Q and can be folded back so as not to obstruct the opening / closing door 5a during the opening / closing operation of the opening / closing door 5a. The side edge 6a is sewn to the screen curtain 5.

A steel weight 7 is provided at the lower edge of the screen curtain 5 in order to ensure smooth descending operation and stability of ground contact with the floor surface 4. The weight 7 mainly includes a door weight 7a attached to the lower edge of the evacuation door 5a, and a pair of left and right curtain weights 7b attached to the lower edge of the screen curtain 5 excluding the evacuation door 5a. To be done. Specifically, as shown in FIG. 3, the curtain weight 7b includes a pair of weight bars 9 for sandwiching the lower edge portion of the screen curtain 5 wound around a core member 8 from the front and back of the screen curtain 5, and a lower part of the screen curtain 5. It is composed of a thin plate-shaped steel decorative material 10 that wraps around to make up the weight bar 9 and the weight bar 9 is fastened together with the steel decorative material 10 from the front and back of the screen curtain 5 with bolts and nuts 11. Thus, it is attached to the lower edge of the screen curtain 5.

The door weight 7a is constructed in substantially the same manner,
One end on the side opposite to the slit Q is rotatably connected to one curtain weight 7b adjacent to the slit Q via a main hinge 12. Thus, the evacuation door 5a is configured as a triangular door that opens and closes so as to flip up, with the hypotenuse L connecting the main hinge 12 and the upper end of the slit Q being folded back. The door weight 7a also acts to automatically close the evacuation door 5a that has been flipped up and opened by its own weight. Similarly, an auxiliary weight 7c is also provided on the lower edge of the cover curtain 6,
This auxiliary weight 7c is rotatably connected to the other curtain weight 7b through an auxiliary hinge 13.

As shown in FIG. 1, a slit 14 having a length substantially equal to the width of the screen curtain 5 is formed in a portion of the ceiling 2 immediately below the winding shaft 3, and the screen curtain 5 is inserted through the slit 14. Be lowered. A pair of side walls 15 having the width dimension of the screen curtain 5 are formed in the internal space S of the building which is partitioned by the screen curtain 5, and both side walls 15 guide both side edges of the descending screen curtain 5. A steel guide 16 is provided.

The guide 16 is, as shown in FIG.
And is disposed in a groove portion 17 formed along the vertical direction. The guide 16 slightly protrudes outward from the opening of the groove portion 17 and comes into contact with the surface of the side wall 15 with a pair of positioning flange portions 16a, and the positioning flange portion 16a extends into the groove portion 17 and has a width. A narrowed portion 16b forming a narrow gap
And a widening portion 16c having a closed cross section, which is continuously provided at the back of the narrowed portion 16b. The side edge portion of the screen curtain 5 is inserted into the gap of the narrowed portion 16b, and the widening portion 16c accommodates the locking metal fitting 18 provided at the tip of the side edge portion of the screen curtain 5 in a descendable manner. The guide 16 guides the descending movement of the screen curtain 5 while engaging the locking metal fitting 18 of the screen curtain 5 with the narrowed portion 16b to prevent the side edge of the screen curtain 5 from slipping out.

In particular, in this embodiment, the steel member exposed to the interior space S of the building and exposed to heat and flames in the case of a fire, specifically, the weight 7 and the guide 16, has almost the entire surface thereof. The refractory layer P is formed by spraying or applying a heat-foaming refractory paint such as a fire-resistant paint for steel frames so as to cover it. In the illustrated example, the heat-foamable refractory layer P is
The steel decorative material 10 covering the weight bar 9 and the upper end surface and the side wall 15 of the weight bar 9 not covered with the decorative material 10.
Positioning flange portion 1 of the guide 16 protruding from the groove portion 17 of the
It is formed around 6a. Also, although not shown,
The steel decorative material 10 may have a fire resistant layer P formed on its bottom surface which is grounded to the floor surface 4.

Various types of heat-foamable fire-resistant paints themselves are well known, such as "SK Taika Coat (trade name; manufactured by SK Kaken Co., Ltd.)" and "Dansir-D" known as expansive graphite. Flame retardant, foaming agent,
It is prepared by mixing a carbonizing agent, a filler and the like in an appropriate ratio.
For example, a vinyltoluene-butadiene copolymer or a vinyltoluene-acrylic acid ester copolymer is used as a binder, and ammonium polyphosphate as a flame retardant, melamine as a foaming agent, dipentaerythritol as a carbonizing agent, and titanium dioxide as a filler. Is used. Also known is a mixture of these mixtures with chlorinated paraffin as a plasticizer, and these can be applied. When exposed to high heat of about 250 ° C., this heat-foamable fire-resistant coating material has the property of forming a high-density carbonized layer while foaming and expanding, and increasing the volume several tens of times.

Instead of forming the refractory layer P by applying the heat-foamable fireproof paint to the steel decorative material 10 or the like, a sheet material containing the heat-foamable fireproof material is used, and this sheet material is used as the paint. The refractory layer P may be formed by adhering to the steel decorative material 10, the weight bar 9, and the guide 16 in the same manner as in the case. "SK Taika sheet (trade name; manufactured by SK Kaken Co., Ltd.)" is known as a sheet-shaped heat-foamable fireproof material.

In the fireproof compartment screen shutter 1 according to the present embodiment as described above, when a fire occurs, the screen curtain 5 is unwound from the winding shaft 3 and hangs down toward the floor surface 4 to cause a fire. The generation side and the evacuation side are divided, and smoke, gas, and flame generated on the fire generation side are prevented from spouting to the evacuation side to prevent the spread of fire. When evacuating, simply pressing the evacuation door 5a opens the slit Q between the evacuation door 5a and the screen screen 5 and allows escape. Further, when the operation force for opening the evacuation door 5a disappears after the escape, the evacuation door 5a is automatically returned by the action of the door weight 7a to close the slit Q and maintain the closed state. At this time, the cover curtain 6 is folded back in response to the opening operation of the evacuation door 5a and closes the slit Q in accordance with the closing operation to improve the sealing performance around the slit Q.

Particularly, in this embodiment, when the weight 7 and the guide 16 which are robust steel members are exposed to the high heat and flame on the side where the fire is generated, the weight 7 and the guide 1 are exposed.
The heat-foamable refractory layer P of No. 6 foams and expands to form a carbonized layer. The carbonized layer functions as a heat insulating layer that suppresses heat transfer and heat radiation to the weight 7 and the guide 16. As a result, it is possible to prevent the steel weight 7 and the guide 16 from being thermally deformed and prevent a gap from being generated due to the thermal deformation, and even if a gap is generated, the volume is expanded. The gap can be appropriately closed by the refractory layer P. Therefore, the fireproof compartment can be surely closed without any hindrance to the evacuation activity using the evacuation door 5a, and the fireproof compartment screen shutter 1 can exhibit an excellent fire spread prevention function.

[0019]

In summary, the screen shutter for the fireproof compartment according to the present invention can prevent the heat deformation of the weights and the guides, and can surely seal the gap connecting the fire generating side and the evacuation side.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a screen shutter for a fireproof compartment according to the present invention.

FIG. 2 is a partial perspective view showing an open state of an evacuation door in the screen shutter for the fireproof compartment of FIG.

FIG. 3 is a sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along the line BB in FIG.

[Explanation of symbols]

1 Fireproof screen shutter 2 ceiling 4 floor 5 screen curtain 7 weights 16 guides P heat-foamable refractory layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ryosuke Shinbo             2-12, Shiba Daimon, Minato-ku, Tokyo Uni             Chika Glass Fiber Co., Ltd. F-term (reference) 2E042 AA01 DA01

Claims (2)

[Claims] 1. A screen shutter for a fireproof compartment, which is equipped with a screen curtain having a non-combustible or fire resistant flexibility that descends from the ceiling side and partitions the interior of the building, wherein a floor surface is provided at the lower edge of the screen curtain. A screen shutter for a fireproof compartment, wherein a weight to be grounded is provided, and a thermally foamable fireproof layer is formed on the weight. 2. A screen shutter for a fireproof compartment, which comprises a screen curtain having a non-combustible or fire-resistant flexibility, which is descended from the ceiling side and partitions the interior of the building, wherein the building has a side edge portion of the screen curtain. A screen shutter for a fireproof section, characterized in that a guide for engaging with a guide for guiding the descending movement of the screen curtain is provided, and a thermally foamable fireproof layer is formed on the guide.