JP2002332703A - Fire-resistant structure for floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by extending fire-resistant performance of a floor to a one-hour fire-resistant structure even in the case of a single-layer gypsum board to form a thin fire-resistant heat insulating material for reducing cost, and achieving light weight. SOLUTION: This fire-resistant structure comprises the fire-resistant heat insulating material 2 disposed under a floor member 1 of an upper floor in a multi-storied building. A ceiling 4 is installed under the fire-resistant heat insulating material 2 through furring strips 3. The ceiling 4 is composed of the single-layer gypsum board 5, and glass fibers 6 are put to cover the whole lower surface of the gypsum board 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant structure of a floor in a multi-storey building, and more particularly to a fire-resistant structure of a floor in a house such as a wooden house or a steel house, or in a non-house such as a factory or an office building.

[0002]

2. Description of the Related Art In a residential or non-residential floor structure, the following is required.
In order to clear the quasi-temporal fire-resistant structure, the following specifications are available for the fire protection coating on the ceiling immediately below the upper floor.

(1) A gypsum board having a thickness of 12 mm or more is placed on a gypsum board having a thickness of 12 mm or more, and rock wool having a thickness of 50 mm or more (density of 40 kg / m ³ or more) and a thickness of 40 mm or more are provided on the back side. Glass wool (24k density)
g / m ³ or more) or a glass wool with a thickness of 90 mm or more (density of 10 kg / m ³ or more), (2) a 12 mm or more reinforced gypsum board having a thickness of 12 mm or more One with reinforced gypsum board,
(3) On the back side of a reinforced gypsum board having a thickness of 15 mm or more, rock wool having a thickness of 50 mm or more (density of 40 kg / m ³ or more) and glass wool having a thickness of 40 mm or more (density of 24 k
g / m ³ or more) or glass wool having a thickness of 100 mm or more (density of 10 kg / m ³ or more), and (4) a reinforced gypsum board having a thickness of 12 mm or more and a thickness of 9 mm or more. Rock wool sound absorbing boards are permitted.

[0004]

However, when two layers of gypsum board are used, as in (1), (2) and (4) above, the number of gypsum boards increases, resulting in high cost. In addition, the weight is heavy, and transport / construction becomes difficult. In addition, rock wool and glass wool (thickness of 40 mm) are placed on the back side of one reinforced gypsum board as in the above (3).
Or rock wool and glass wool (thickness 10)
(0 mm or more) has a problem that the cost is high. At present, if the gypsum board is made of one layer, there is a problem that the gypsum board cannot be adapted to the fire resistance performance for one hour because the gypsum board is cracked or peeled by the heat of fire.

On the other hand, in the above cases (1) to (4), only the one-hour quasi-refractory structure can be cleared, and it is not suitable for the one-hour refractory structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a single-layer gypsum board and a thin fire-resistant heat-insulating material. Floor that can expand the fire resistance performance of 1 hour to fire resistant structure, and can reduce the number of gypsum boards and the amount of fire insulating material to reduce cost and improve workability by weight reduction. To provide a fireproof structure.

[0007]

According to the first aspect of the present invention, in order to solve the above-mentioned problem, a fire-resistant heat insulating material 2 is arranged below a floor material 1 on an upper floor in a multi-storey building. The floor has a fireproof structure, in which a ceiling 4 is attached below a fireproof heat insulating material 2 via a ridge 3. The ceiling 4 is formed of a single layer of gypsum board 5, and extends over the entire lower surface of the gypsum board 5. The glass fiber 6 is characterized in that the gypsum board 5 is not cracked or peeled by the fire or heat during a fire. As a result, even if the gypsum board 5 is made into one layer and the fireproof heat insulating material 2 is made thin, the fire resistance is greatly improved, and the fireproof structure can be cleared for one hour.

According to a second aspect of the present invention, in the first aspect, the single-layer gypsum board 5 comprises a plurality of small gypsum boards 5A arranged vertically and horizontally, and between the adjacent small gypsum boards 5A, 5A. The one-way seam 7 is arranged along the field edge 3 and adjacent split gypsum boards 5A, 5A
It is preferable that the seam 7A between the other directions is arranged along the orthogonal field edge 3A orthogonal to the field edge 3, and in this case, by adding the orthogonal field edge 3A, the other direction is provided. Seam 7A can be closed at the orthogonal field edge 3A,
The edge 3 (3A) can prevent fire from entering the ceiling from the joint 7 (7A), and can improve the fire resistance performance at all the joints 7 and 7A.

According to a third aspect of the present invention, in the second aspect, the joints 7, 7A between the small gypsum boards 5A, 5A are provided.
A glass fiber 6A for bonding covering the lower surface side of
Alternatively, it is preferable to provide a refractory material 11 attached to the seams 7, 7A. In this case, it is possible to prevent fire from entering from the seams 7, 7A between the small gypsum boards 5A, 5A at the time of fire. The glass fiber 6A for joining or the refractory material 11 can surely prevent the problem.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

In this embodiment, the structure of the floor on the upper floor of a building is exemplified. As shown in FIG. 1, a fire-resistant heat insulating material 2 made of rock wool or the like is disposed below a floor material 1 on the upper floor. And
A ceiling 4 is attached below the refractory heat insulating material 2 via a ridge 3. The thickness of the refractory heat insulating material 2 is about 50 mm. In addition, 8 in FIG. 1 is a field support, 9 is a hanging tree, and 10 is a joist.

The ceiling 4 directly below the upper floor is made up of a single layer of gypsum board 5 instead of the conventional two layers of gypsum board. In this example, the one-layer gypsum board 5 is divided into a plurality of small-part plasterboards 5A, as shown in FIG. These split gypsum boards 5A are arranged vertically and horizontally, and a joint 7 in one direction (vertical direction in FIG. 2) between the adjacent split gypsum boards 5A, 5A is arranged along the field edge 3. Further, an orthogonal edge 3A orthogonal to the edge 3
Is additionally installed, and a joint 7A in the other direction (the horizontal direction in FIG. 2) between the adjacent split gypsum boards 5A, 5A is arranged along the orthogonal edge 3A. The gypsum board 5 is not limited to a plurality of pieces, and may be a single piece.

The lower surface of each split gypsum board 5A is covered with glass fiber 6 over the entire surface. The glass fiber 6 is used for improving the fire resistance performance of the gypsum board 5, and in this example, the glass fiber 6 also covers the upper surface of the split gypsum board 5A, but the glass fiber 6 on the upper surface can be omitted. It suffices that at least the entire lower surface of the lower floor facing the interior of the room be covered.

Further, the joint 7 in one direction and the joint 7A in the other direction between the small gypsum boards 5A, 5A have fireproof specifications shown in FIGS. In addition, seam 7,7A
Have the same refractory specifications, and the one-way joint 7 will be described below. In the example shown in FIG. 5, a band-like joining glass fiber 6A is arranged on the lower surface side of the joint 7 in one direction over the entire length thereof. Both sides in the width direction of the joining glass fiber 6A overlap with the end of the glass fiber 6 covered on the lower surface of the split gypsum board 5A, and the lower surface of the joining glass fiber 6A including this overlapping portion. The whole surface is sealed with putty 12.

According to the above construction, the ceiling 4 immediately below the upper floor is provided.
Is formed with a single layer of gypsum board 5 composed of a plurality of subdivided gypsum boards 5A, and the entire lower surface thereof is covered with glass fibers 6. Furthermore, small split gypsum board 5A, 5A
The lower surfaces of the one-way seam 7 and the other-direction seam 7A are covered with bonding glass fibers 6A, respectively.
The joining glass fiber 6A is overlapped with the end of the glass fiber 6 and sealed with the putty 12. As a result, the glass fiber 6 and the joining glass fiber 6A are covered over the entire lower surface of the ceiling 4 made of the single-layer gypsum board 5, and the gypsum board 5 may be cracked by fire or heat during a fire. As a result, the fire resistance of the ceiling 4 is greatly improved. As a result, the floor structure, which previously could only clear the semi-fire resistant structure for one hour, has been replaced with a floor structure that can clear the fire resistant structure for one hour. Be able to expand and expand.

In addition, the number of gypsum boards 5 can be reduced by changing the gypsum board 5 which has conventionally required two upper and lower layers to one layer of gypsum board 5. Conventionally, in order to clear the refractory structure for one hour, the thickness of the refractory heat insulating material must be 90.
mm or more, whereas the present invention requires that
Even if the thickness of the refractory is reduced to about 50 mm, the refractory structure can be cleared for one hour, so that the amount of the refractory heat insulating material 2 can be reduced. Can be planned. By the way,
In the case of the conventional example using the upper and lower two layers of gypsum board 5, the upper layer of the gypsum board 5 is shifted with respect to the lower layer of the gypsum board 5 to prevent intrusion of fire from the seam. As a measure to prevent the intrusion of fire from the seams 7, 7A of the gypsum board 5, the lower surface side of the seam 7 (similarly 7A) is sealed with a glass fiber 6A for joining, and the upper surface side of the seam 7 is set to the rim 3. Is closed. In addition, the upper surface side of the joint 7A is closed by the orthogonal ridge 3A. Thereby, invasion of fire from the joint 7 (7A) can be reliably prevented in two stages of the joining glass fiber 6A and the ridge 3 (orthogonal ridge 3A), and the fire resistance of the joints 7, 7A is improved. It will be greatly improved. In addition, by additionally installing the orthogonal edge 3A, the support strength of the ceiling 4 can be increased, and by dividing the gypsum board 5 into a plurality of subdivided gypsum boards 5A, the subtle feeling of the ceiling 4 can be improved. There is also an advantage that the design can be improved.

As another example of the fireproof structure of the seam 7 in one direction and the seam 7A in the other direction between the split gypsum boards 5A, 5A, the glass fiber 6A for connection is omitted, and FIG.
As shown in FIG. 7, a refractory material 11 may be attached to the joint 7. In this example, the inside of the joint 7 is filled with the refractory material 11. As the refractory material 11, for example, a foam sheet 11A obtained by processing foamed carbide into a sheet, for example, "S refractory sheet" (trade name of Sekisui Chemical Co., Ltd.) is used. This makes it possible to reliably prevent the intrusion of fire from the joint 7 (7A) in two stages of the foam sheet 11A and the ridge 3 (orthogonal ridge 3A), and furthermore, the foam sheet 11A is heated by fire. As shown by arrows a and b in FIG. 6B, the joint 7 (7A) expands from the inside to the outside, so that the joint 7 (7A) is securely closed, and the intrusion of fire can be more reliably prevented. Thus, the fire resistance is greatly improved. As a method of filling the inside of the seam 7 with the foamed sheet, for example, a foamed sheet 11A is pasted on the side end surface of one of the adjacent split gypsum boards 5A at the time of application of the split gypsum board 5A, and the adjacent sections are adjacent to each other. There is a method of abutting the side end surfaces of the split gypsum board 5A such that the side end surface of the other split gypsum board 5A is pressed against the foam sheet 11A. Of course, the method of filling the foam sheet is not limited to this. Further, the refractory material 11 may be other than the foam sheet 11A.

Further, instead of filling the inside of the seam 7 with the foam sheet 11A as described above, as shown in FIG. 7A, the upper surface of the gypsum board 5 and the ridge 3 (the orthogonal ridge 3A is also the same). ) May be covered with a foam sheet 11A serving as the refractory material 11 in the closed space 13 between the lower surface of FIG. In this case, the heat of the fire causes the foamed sheet 11A to spread from the closed space 13 toward the inside and further outside of the seam 7, as indicated by the arrow C in FIG. 7B. The closed area is increased and the penetration of fire from the seam 7 can be further prevented. Further, in this case, since the foam sheet 11A does not need to be filled inside the seam 7, the construction of the split gypsum board 5A is simplified, and the construction can be reduced.

[0019]

As described above, according to the first aspect of the present invention, there is provided a fire-resistant structure for a floor in which a fire-insulating material is disposed below a floor material on an upper floor in a multi-storey building. A ceiling is attached to the lower side of the heat insulating material via a ridge, and the ceiling is formed of a single layer of gypsum board, and is covered with glass fiber over the entire lower surface of the gypsum board. As a result of preventing the gypsum board from cracking or peeling due to heat with glass fiber, the gypsum board is made into one layer and the thickness of the refractory heat insulating material is reduced to 90 mm of the conventional thickness.
From the above, even if it is thinned to about 50 mm, its fire resistance is greatly improved, and the floor structure, which previously could only clear the semi-fire resistant structure for 1 hour, has been expanded to the floor structure that can clear the fire resistant structure for 1 hour The effect is obtained. Further, the effect of reducing the material cost by reducing the number of gypsum boards and the amount of the refractory heat insulating material and improving the workability by reducing the weight can be obtained.

According to the invention of claim 2, in addition to the effect of claim 1, the one-layer gypsum board is composed of a plurality of small-piece gypsum boards arranged vertically and horizontally, and the small-piece gypsum boards adjacent to each other are provided. Since the one-way seam between them is arranged along the field edge, and the seam in the other direction between the adjacent gypsum boards is arranged along the orthogonal field edge orthogonal to the field edge, the orthogonal field edge is formed. By increasing the support strength of the ceiling, the joints in the other direction can be closed at the orthogonal edge, and in the event of a fire, it is possible to prevent the intrusion of fire from the joints into the ceiling and all joints. In this case, the fire resistance performance can be improved. Further, by adding orthogonal edges, the ceiling support strength is increased, and by dividing into multiple pieces of gypsum board, a feeling of subdivision of the ceiling is obtained, and designability can be improved. .

According to a third aspect of the present invention, in addition to the effect of the second aspect, a joining glass fiber for covering the lower surface side of the seam between the small gypsum boards is provided or attached to the seam. Since the refractory material is provided, intrusion of fire from the joint at the time of a fire can be reliably prevented by the glass fiber for joining or the refractory material, and the fire resistance performance of the joint can be further improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.

FIG. 2A is a bottom view of a ceiling made of the same gypsum board, and FIG. 2B is a cross-sectional view taken along line BB of FIG.

FIG. 3 is a sectional view illustrating a joint structure of the gypsum board according to the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

5A is a cross-sectional view taken along the line CC of FIG. 2, and FIG. 5B is a cross-sectional view of two parts of FIG.

FIG. 6A is a cross-sectional view of another example, and FIG. 6B is an explanatory diagram illustrating a state in which a foam sheet as a refractory material is spread.

7A is a cross-sectional view of still another example, and FIG. 7B is an explanatory view illustrating a state in which a foam sheet as a refractory material is spread.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upstairs floor material 2 Fireproof insulation material 3 Field edge 3A Orthogonal field edge 4 Ceiling 5 Gypsum board 5A Split gypsum board 6 Glass fiber 6A Glass fiber for joining 7 One-way joint 7A Other-direction joint 11 Fireproof material

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DE01 FA13 FA14 GA12 GA42 HA03 HA32 HA33 LA12

Claims (3)

[Claims] 1. A fire-resistant structure for a floor, in which a fire-resistant heat insulating material is arranged below a floor material on an upper floor in a multi-story building, wherein a ceiling is attached below the fire-resistant heat insulating material via a field edge, A fireproof structure for a floor, wherein the ceiling is made of a single layer of gypsum board, and glass fiber is coated on the entire lower surface of the gypsum board. 2. The single-layer gypsum board is composed of a plurality of split gypsum boards arranged vertically and horizontally, and a one-way seam between adjacent split gypsum boards is arranged along a field edge. The floor refractory structure according to claim 1, wherein seams in the other direction between the matching split gypsum boards are arranged along an orthogonal edge which is orthogonal to the edge. 3. The floor according to claim 2, comprising a bonding glass fiber covering the lower surface side of the seam between the split gypsum boards, or a refractory material attached to the seam. Fireproof structure.