JPH08302876A - Floor of building - Google Patents

Abstract

PURPOSE: To provide the required strength with a smaller number of layers of material by forming a floor panel from a floor finish, a high-specific-gravity gypsum board, and plywood which serve as first, second, and third layers, respectively, from above. CONSTITUTION: A plurality of joists 16 are stretched between four lower beams 15 made in opposite pairs and assembled into a square shape, and floor panels 12 are bonded to their upper surfaces. The flooring 17 of the floor panel 12 comprises a floor finish 23 made of flooring or a cushion floor to serve as a first layer, a high-specific-gravity gypsum board 24 with a specific gravity of about 1.25 as a second layer, and plywood 25 as a third layer. Therefore, management and fabrication of the members is facilitated as the result of a reduction in their number, and high floor strength can be obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a building floor,
For example, it can be used for the floor of a unit building.

[0002]

BACKGROUND ART In recent years, a unit-type building has been constructed in which living rooms and the like that compose a building are manufactured as building units in a factory and these building units are transported to the site for construction. The building unit is configured to include a floor panel, a ceiling panel, a pillar erected between the floor panel and the ceiling panel, a wall panel, and the like.

As shown in FIG. 3, in the floor panel 51 constituting the floor, four lower beams 52 are assembled in a square shape, and a plurality of joists 53 are bridged between a pair of lower beams 52 facing each other. Further, a floor material 54 is stretched on the upper surface. The floor material 54 is formed by laminating four layers of a floor finishing material 55, a plywood 56, a gypsum board 57 and a plywood 58 from the top.

The gypsum board 57 is made of calcined gypsum, sawdust, pearlite or the like into a plate shape and has both sides coated with a board base paper. Also, the floor finishing material 55
Is a flooring, cushion floor, etc.

[0005]

[Problems to be Solved by the Invention] The conventional gypsum board
Since the floor containing 57 had the desired strength by having the above-mentioned four-layer structure, a large number of members were required.

[0006] Therefore, an object of the present invention is to provide a floor of a building which can obtain a required strength with a small number of layers.

[0007]

With reference to the drawings, the floor of a building according to the first aspect of the present invention, as shown in FIG. 2, has a high specific gravity plaster board 24 as at least one layer of a floor material 17. It is characterized by including. The high-specific-gravity gypsum board has excellent strength and hardness. The high specific gravity gypsum board can obtain a desired high specific gravity by adjusting the porosity and the like.

The floor of the building according to the second aspect of the present invention is the first floor.
In the invention, the high specific gravity gypsum board 24 is characterized by being mixed with glass fiber. The glass fiber contributes to improving the strength of the gypsum board.

The floor of the building according to the third aspect of the present invention is the first
Alternatively, in the second invention, the high-specific-gravity gypsum board 24 has a specific gravity of 1.0 to 1.6. If the specific gravity is less than 1.0, the proportion of air bubbles will increase, and the strength will not differ from that of ordinary gypsum board. On the other hand, if the specific gravity exceeds 1.6, the weight becomes large and the handling becomes inconvenient, and the manufacturing becomes substantially difficult. The preferred specific gravity is 1.2 to 1.4.
Is.

The floor of the building according to the fourth aspect of the present invention is the first floor.
In any one of the third inventions, the floor material 17 includes a floor finishing material 23 and the high-specific-gravity gypsum board 24 provided on the lower surface of the floor finishing material 23.

The floor of the building according to the fifth aspect of the present invention is the first floor.
~ In any one of the fourth invention, in the floor material 17, the floor finishing material 23, the high specific gravity gypsum board 24 provided on the lower surface of the floor finishing material 23, and the lower surface of the high specific gravity gypsum board 24 And a plywood 25 that has been formed.

The floor of the building according to the sixth aspect of the present invention is the first floor.
~ In any one of the fifth invention, the floor of the building is a floor panel 12 of a unit type building.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A floor of a building according to an embodiment of the present invention will be described with reference to FIGS. The floor of this embodiment is the floor panel 12 of the building unit 11 which comprises a unitary building.

As shown in FIG. 1, the building unit 11
Floor panel 12, ceiling panel 13, floor panel 12 and ceiling panel
It is configured by including four columns 14 erected between 13 and an outer wall panel (not shown). The floor panel 12 includes four lower beams 15
Are assembled in a square, and multiple joists are placed between the pair of lower beams 15 facing each other.
16 is hung, and floor material 17 is stretched on the upper surface. In addition, the ceiling panel 13 has four upper beams 18 formed in a square shape, a plurality of small beams 19 spanning between a pair of upper beams 18 facing each other, and a ceiling material 21 stretched on the lower surface. Is.

As shown in FIG. 2, the floor material of the floor panel 12
The top 17 includes a floor finishing material 23 which is the first layer, a high specific gravity gypsum board 24 which is the second layer, and a plywood 25 which is the third layer from the top. The floor finishing material 23 comprises a flooring or a cushion floor.

The high specific gravity gypsum board 24 is made of calcined gypsum, glass fiber or the like and has a specific gravity of 1.25.
The characteristics of the high specific gravity gypsum board 24 having a specific gravity of 1.25 are as follows. 400 mm × 300 mm × 12.5 mm high density gypsum board 24
The bending fracture load was measured according to JIS A 6901 with the distance between fulcrums set to 350 mm, and when dried, it was approximately 130 kgf in the direction perpendicular to the longitudinal direction of the board and approximately 55 kgf in the parallel direction.
, 37k in the direction perpendicular to the longitudinal direction of the board when absorbing water
gf, about 22kgf in the parallel direction.

The pull-out strength of a wood screw having a diameter of 4 mm is about 85 kgf. Furthermore, when the flame retardancy was tested according to JIS A 1321, it showed noncombustibility. As the high specific gravity gypsum board 24, Tiger Super Hard (trade name, manufactured by Yoshino Gypsum Co., Ltd.), which is also called a hard gypsum board, was used.

On the other hand, the characteristics of the conventional gypsum board are as follows. When the bending fracture load was measured under the same conditions as in the case of the high specific gravity gypsum board 24, about 64 kgf in the direction perpendicular to the longitudinal direction of the board during drying, about 24 kg in the parallel direction.
f, about 9k in the direction perpendicular to the longitudinal direction of the board when absorbing water
gf is about 3 kgf in the parallel direction. The pull-out strength of a wood screw with a diameter of 4 mm is about 30 kgf. Specific gravity is about 0.65
Is.

Therefore, comparing the high specific gravity gypsum board 24 with the conventional gypsum board, the high specific gravity gypsum board 24 used in the present embodiment has a high specific gravity of 1.25 and is mixed with glass fiber. Therefore, it can be seen that it has a large strength.

In the production of the building unit 11 in the factory, the floor panel 12 has four lower beams 15 assembled in a square as usual, and a plurality of joists 16 are laid between a pair of opposing lower beams 15. It can be provided by arranging the floor material 17 on the upper surface of the frame.

Floor panel of the building unit according to the present embodiment
According to 12, high-density gypsum board 24 which is one layer of floor material 24
However, the flooring 17 has, for example, 3 because it has high strength.
The layers provide the required strength. Therefore, as compared with the conventional four-layer structure in which an extra layer of plywood is required, the floor material 17 requires only three layers, and the number of members can be reduced. Further, it is possible to make the floor material 17 thinner than the conventional floor material.

Further, with the reduction of the number of members, it is possible to obtain an effect that the management and manufacturing of the members become easy. Furthermore, when the same four-layer structure as the conventional one is used, a larger floor strength than the conventional one can be obtained.

In the above embodiment, the high specific gravity gypsum board 24, which is a reinforcing member, has a specific gravity of 1.25, but 1.0 to 1.
High specific gravity within the range of 6 is optional.

Further, in the above embodiment, the floor material 17 contained one layer of the high specific gravity gypsum board 24, but it may have two or more layers depending on the required strength. Even in this case, the conventional gypsum board is used. It is possible to reduce the number of layers in the entire floor material compared to the case of using it. Further, although the building of the above embodiment is a unit type building, the building of the present invention may be a frame type building, a panel type building, or the like.

[0025]

EFFECTS OF THE INVENTION According to the floor of the building of the present invention, since at least one layer of the floor material is made of high-specific-gravity gypsum board, the required strength can be obtained with a small number of layers.

[Brief description of drawings]

FIG. 1 is a perspective view of a building unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a floor panel of the building unit of the same embodiment.

FIG. 3 is a cross-sectional view of a floor panel of a conventional building unit.

[Explanation of symbols]

 11 Building units that compose a building 12 Floor panels that are floors 17 Floor materials 23 Floor finishing materials 24 High-density plaster board 25 Plywood

Claims (6)

[Claims] 1. A building floor comprising at least one layer of flooring material comprising a high specific gravity gypsum board. 2. The floor of a building according to claim 1, wherein the high-specific-gravity gypsum board is mixed with glass fiber. 3. The high specific gravity gypsum board has a specific gravity of 1.0-
The floor of the building according to claim 1 or 2, wherein the floor is 1.6. 4. The building according to claim 1, wherein the floor material includes a floor finishing material and the high-density plaster board provided on a lower surface of the floor finishing material. Floor. 5. The floor material includes a floor finishing material, the high-density plaster board provided on the lower surface of the floor finishing material, and a plywood provided on the lower surface of the high-gravity gypsum board. The floor of the building according to any one of claims 1 to 4. 6. The floor of a building according to claim 1, wherein the floor of the building is a floor panel of a unit type building.