JP2023151419A - floor structure - Google Patents

Abstract

To suppress sound generated from a floor when walking.SOLUTION: In a floor structure 1, a plurality of floor materials 4 are stacked and laid on a top of floor support legs erected on a floor slab. The plurality of floor materials 4 include: a first floor substrate board 8 supported from below by the floor support legs; a second floor substrate board 9 arranged above the first floor substrate board 8; and a floor finishing material 10 arranged above the second floor substrate board 9 to constitute a floor surface. The second floor substrate board 9 is a layered gypsum board having a glass fiber layer 9b containing glass fiber.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a double-floor floor structure in a building such as an apartment complex.

Conventionally, in apartment complexes, floor slabs for each floor are formed on a concrete frame, etc., and supporting legs are erected on these floor slabs via cushion rubber pedestals, and particles for the subfloor are placed on top of these floor slabs. The floor structure uses boards, plywood, etc., and a finishing layer of flooring.

For example, Patent Document 1 discloses a double floor structure using gypsum board with excellent fire resistance. In this double floor structure, multiple floor panels are supported at a predetermined height level by support stands set up on the foundation floor to form a double floor, and a gypsum board is placed on top of the floor panels. Laying floor coverings.

Registered utility model No. 3061404

However, as described in Patent Document 1, in a double floor structure constructed by stacking multiple floor materials (floor panels, gypsum boards, and floor finishing materials), the load from the feet when walking on the floor, etc. When inputting to the floor below, there is a possibility that noise will be generated from the floor due to the downward deflection of the flooring material. For example, if the flooring material bends downward when the load from the feet is input to the floor below when walking, the flooring material may rub against each other or the flooring material and fixing nails, etc. due to the deflection of the flooring material. Sound may be generated from the

Therefore, the present disclosure aims to provide a floor structure that can suppress the generation of sound from the floor when walking.

In order to solve the above problems, a first aspect of the present invention provides a floor structure in which a plurality of flooring materials are stacked and laid on top of floor support legs erected on a floor slab, wherein the plurality of flooring materials includes a first floor subboard that is supported from below by the floor support legs, a second floor subboard that is arranged above the first floor subboard, and a second floor subboard that is arranged above the second floor subboard. The second floor base board is a layered gypsum board having a glass fiber layer containing glass fiber.

A second aspect of the present invention is the floor structure according to the first aspect, wherein the glass fiber layer of the second floor base board is located below the center of the second floor base board in the thickness direction. provided.

A third aspect of the present invention is the floor structure according to the second aspect, wherein the glass fiber layer of the second floor base board is provided at the lowest layer of the second floor base board.

A fourth aspect of the present invention is the floor structure according to any one of the first to third aspects, wherein the second floor base board is provided on the uppermost layer and is made of paper. It has layers.

A fifth aspect of the present invention is the floor structure according to the fourth aspect, wherein a plurality of the second floor base boards are provided adjacent to each other, and the adjacent portions of the plurality of second floor base boards are A sealing member is provided on the upper surface side.

A sixth aspect of the present invention is the floor structure according to any one of the first to fifth aspects, wherein the glass fibers of the glass fiber layer of the second floor base board are arranged in a lattice shape. Fiberglass net provided.

A seventh aspect of the present invention is the floor structure according to any one of the first to sixth aspects, in which the thickness of the second floor base board is set to 9.5 mm or more.

An eighth aspect of the present invention is the floor structure according to any one of the first to seventh aspects, wherein the specific weight of the second floor base board is set to 1.25 g/ ^cm3 . Ru.

According to the present disclosure, it is possible to suppress the generation of sounds from the floor during walking.

It is a perspective view from above explaining a floor structure concerning one embodiment of the present invention. It is a sectional view of a floor structure. FIG. 3 is an enlarged view of part III in FIG. 2; It is a perspective view from the lower surface side of a 2nd floor base board. FIG. 2 is an enlarged view of portion V in FIG. 1. FIG.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view from above of a floor structure 1 according to an embodiment of the present invention. FIG. 2 is a sectional view of the floor structure 1.

A floor structure 1 according to an embodiment of the present invention is applied, for example, to a double-floor floor structure in a building such as a concrete apartment complex.

As shown in FIGS. 1 and 2, the floor structure 1 according to the present embodiment is a floor structure in which a plurality of flooring materials 4 are stacked and laid on top of floor support legs 3 erected on a floor slab 2. . The plurality of floor materials 4 are arranged at positions spaced upward from the floor slab 2 and are supported by the floor support legs 3 from below.

The floor support leg 3 is a member that is disposed between the floor slab 2 and the floor material 4 and supports the floor material 4 from below, and includes a pedestal 5, a support column 6, and a board receiver 7. In this embodiment, a plurality of floor support legs 3 are provided between the floor slab 2 and the flooring 4. The base 5 is made of an elastic material such as cushion rubber, and functions as a cushioning material. The support column 6 is a columnar member extending in the vertical direction, and its lower end is rotatably and elastically supported by the base 5. A board receiver 7 is attached to the upper end of the support column 6. The support column 6 has a mechanism that allows the height position of the board receiver 7 to be adjusted. For example, the support column 6 is a bolt, and is screwed into a female threaded portion (not shown) provided on the board receiver 7. By rotating the support 6 with respect to the board holder 7, the height position of the board holder 7 can be adjusted. Note that the configuration of the floor support legs 3 is not limited to the above, and may be any configuration as long as it is disposed between the floor slab 2 and the flooring 4 and can support the flooring 4 from below.

The plurality of flooring materials 4 include a first flooring board 8 supported from below by the floor support legs 3, a second flooring board 9 arranged above the first flooring board 8, and a second flooring board 8. The floor finishing material 10 is arranged above the board 9 and forms a floor surface. In this embodiment, the plurality of flooring materials 4 are constituted by the above three members (the first flooring board 8, the second flooring board 9, and the floor finishing material 10).

The first floor base board 8 is a floor base placed at the lowest level among the plurality of floor materials 4, and is directly attached to the floor support leg 3 or indirectly connected to the floor support leg 3 via a joist material 11. is supported from below. In the present embodiment, a particle board (wooden board) made of heat-compressed wood chips is used as the first floor base board 8. In this embodiment, a plurality of first floor base boards 8 are laid above the floor support legs 3 so as to be adjacent to each other. The first floor subboard 8 is fixed to the floor support leg 3. Note that the first subfloor board 8 is not limited to particle board, and may be plywood. Furthermore, in the present disclosure, being adjacent is not limited to a state in which they are adjacent to each other, but also includes a state in which they are adjacent to each other.

The second floor base board 9 is a floor base laid on the upper surface of the first floor base board 8, and is fixed to the first floor base board 8 by, for example, screws. In this embodiment, a plurality of second subfloor boards 9 are laid above the first subfloor board 8 so as to be adjacent to each other. The second floor base board 9 is formed in a rectangular shape. The detailed configuration of the second floor base board 9 will be described later.

The floor finishing material 10 is a flooring material that is placed on the uppermost side of the plurality of flooring materials 4 and exposed to the indoor side and forms the floor surface, and is laid on the upper surface of the second floor base board 9 without any gaps, It is fixed to the second floor base board 9. The floor finishing material 10 is, for example, veneered plywood with a surface finish.

Next, the configuration of the second floor base board 9 will be explained.

FIG. 3 is an enlarged view of portion III in FIG. 2. FIG. 4 is a perspective view of the second floor base board 9 from the bottom side.

As shown in FIGS. 3 and 4, the second floor base board 9 is a gypsum board placed between the first floor base board 8 and the floor finishing material 10, and in this embodiment, the second floor base board 9 is a four-layered gypsum board. It is formed into a rectangular shape. The second floor base board 9 has upper and lower paper layers 9a, which are provided as the top layer and the second layer from the bottom, and are made up of board base paper (paper) 12, and a glass fiber net (glass fiber net) that is provided as the bottom layer. It has a glass fiber layer 9b containing fibers) 13, and a gypsum layer 9c provided between the upper and lower paper layers 9a. The glass fiber layer 9b of the present embodiment is formed by weaving a glass fiber net 13 into a lattice-like (mesh-like) shape. 9a). That is, the glass fibers of this embodiment are the glass fiber net 13 provided in a lattice shape, and the glass fiber layer 9b of this embodiment is located below the center of the second floor base board 9 in the thickness direction. established in The gypsum layer 9c is a layer made of gypsum and does not include the glass fiber net 13. Note that the glass fiber layer 9b may be constructed by pasting one glass fiber net 13 or may be constructed by pasting a plurality of glass fiber nets 13. Further, in this embodiment, the upper and lower paper layers 9a are provided, but the lower paper layer 9a may not be provided.

The thickness of the second floor base board 9 is preferably 9.5 mm or more. In this embodiment, the thickness of the second floor base board 9 is set to 12.5 mm. Further, the specific weight (weight per unit volume) of the second floor base board 9 is preferably 1.18 g/cm ³ or more and 1.30 g/cm ³ or less. In this embodiment, the specific weight of the second floor base board 9 is set to 1.25 g/cm ³ . The specific weight (1.25 g/cm ³ ) of the second floor base board 9 is the specific weight of a normal gypsum board that does not have the glass fiber layer 9b but has paper layers of base paper for board on both sides above and below the gypsum layer. larger than That is, the specific weight of the glass fiber layer 9b is greater than the specific weight of the gypsum layer 9c. Note that the thickness of the second floor base board 9 is not limited to 12.5 mm. Furthermore, the specific weight of the second floor base board 9 is not limited to 1.25 g/cm ³ .

Next, construction of the floor structure 1 will be explained. FIG. 5 is an enlarged view of the V section in FIG.

When constructing the floor structure 1, first, the joists 11 are installed at a predetermined height along the wall of the room. The joists 11 are supported from below with their height adjusted, for example, by floor support legs 3 (for example, support bolts) for the joists 11. Next, a plurality of floor support legs 3 are erected on the floor slab 2 at predetermined intervals.

Next, a plurality of first floor base boards 8 are laid above the floor support legs 3. At this time, the first floor base board 8 is laid above the floor support leg 3 with a gap 14 provided between it and the other adjacent first floor base board 8. The plurality of floor support legs 3 are arranged along the long sides of the first floor subboard 8. In this state, the first floor base board 8 is fixed to the board holder 7 of the floor support leg 3 using an adhesive sheet and screws. Next, the height position of the first floor base board 8 is adjusted by operating the height adjustment mechanism of the floor support leg 3.

Next, a plurality of second floor subboards 9 are laid over the first floor subboard 8 with the glass fiber layer 9b facing down (with the paper layer 9a facing up). At this time, the second floor base board 9 is placed above the first floor base board 8 with a gap 15 (for example, a gap 15 of about 3 mm) provided between it and the other adjacent second floor base board 9. Lay down. As shown in FIG. 5, after a plurality of second floor sub-boards 9 are laid above the first sub-floor sub-boards 8, adjacent portions of the short sides of adjacent second sub-floor boards 9 (in this embodiment, gaps are A gummed tape (sealing member) 16 is pasted on the upper surface side (the part where the floor board 15 is provided) to seal the adjacent parts of the short sides of the adjacent second floor base boards 9. Next, the plurality of second floor base boards 9 are fixed to the first floor base board 8 from above the second floor base boards 9 using connecting nails or the like.

Finally, the floor finishing material 10 is laid over the second floor base board 9 and fixed to the second floor base board 9 and the first floor base board 8 with floor nails.

In the floor structure 1 configured as described above, the second floor base board 9 is a layered gypsum board having a glass fiber layer 9b containing glass fibers (glass fiber net 13). In this way, the second floor base board 9 has the glass fiber layer 9b containing glass fiber (glass fiber net 13), so even if it is a gypsum board with relatively low rigidity, its rigidity can be ensured. . Therefore, when the load from the feet is input to the floor material 4 below when walking, the downward deflection of the floor material 4 can be suppressed, and the generation of noise caused by the deflection of the floor material 4 can be suppressed. I can do it.

Further, the glass fiber layer 9b of the second floor subboard 9 is provided below the center of the second floor subboard 9 in the thickness direction (the lowest layer in this embodiment). For this reason, when the load from the feet is input to the floor material 4 below during walking, it is possible to suppress the expansion of the lower surface side of the second floor base board 9. Therefore, when the load from the feet is input to the floor material 4 below when walking, the downward deflection of the floor material 4 can be suppressed, and the generation of noise caused by the deflection of the floor material 4 can be suppressed. I can do it.

Furthermore, since the glass fibers provided in the glass fiber layer 9b of the second floor subboard 9 are the glass fiber net 13 provided in a lattice shape, the rigidity of the second floor subboard 9 can be ensured. Therefore, when the load from the feet is input to the floor material 4 below when walking, the downward deflection of the floor material 4 can be suppressed, and the generation of noise caused by the deflection of the floor material 4 can be suppressed. I can do it.

In addition, by setting the thickness of the second floor base board 9 to 9.5 mm or more, the rigidity of the second floor base board 9 can be ensured. Therefore, when the load from the feet is input to the floor material 4 below when walking, the downward deflection of the floor material 4 can be suppressed, and the generation of noise caused by the deflection of the floor material 4 can be suppressed. I can do it.

In addition, by setting the specific weight of the second floor base board 9 to 1.25 g/cm ³ , higher rigidity is ensured than a normal gypsum board that has paper layers of board base paper on both sides above and below the gypsum layer. be able to. Therefore, when the load from the feet is input to the floor material 4 below when walking, the downward deflection of the floor material 4 can be suppressed, and the generation of noise caused by the deflection of the floor material 4 can be suppressed. Can be done. Further, since the specific weight of the second floor base board 9 is made higher than that of normal gypsum board, sound transmission can be suppressed.

In this way, according to the present embodiment, it is possible to suppress the generation of sounds from the floor during walking.

In addition, since the paper layer 9a is provided on the top layer of the second floor base board 9, unevenness on the upper surface of the second floor base board 9 can be suppressed, unlike when a glass fiber layer 9b or a gypsum layer 9c is provided on the top layer. I can do it. Therefore, it is possible to prevent the floor finishing material 10 from floating when the floor finishing material 10 is laid on the upper surface of the second floor base board 9.

Further, a gummed tape (sealing member) 16 is applied to the upper surface side of the adjacent short sides of the adjacent second floor base boards 9 to seal the adjacent short sides of the adjacent second floor base boards 9. In this way, since the base paper 12 of the second floor base board 9 seals the short side of the second floor base board 9, which is relatively easy to peel off, peeling of the base paper 12 for the board can be prevented. Therefore, it is possible to prevent the ends of the short sides of the board base paper 12 from peeling off and turning up, and from protruding upward at the turned up portions, so that the floor finishing material 10 can be prevented from being peeled off and turned up. It is possible to prevent the floor finishing material 10 from floating when it is laid on the floor.

In the present embodiment, the glass fibers provided in the glass fiber layer 9b of the second floor base board 9 are the glass fiber nets 13 provided in a lattice shape, but the present invention is not limited to this, and for example, Sheet-like glass fibers that are not woven but irregularly intertwined may also be used.

Further, in the present embodiment, the second floor base board 9 is laid with a gap 15 provided between it and another adjacent second floor base board 9, but the present invention is not limited to this. It may also be laid in contact with another second floor base board 9.

Further, in the present embodiment, the gummed tape (sealing member) 16 is provided on the upper surface side of the adjacent short sides of the adjacent second floor base boards 9, but the present invention is not limited to this. For example, in addition to the adjacent portions of the short sides of the adjacent second floor subboards 9, or instead of the adjacent portions of the short sides of the adjacent second floor subboards 9, the length of the adjacent second floor subboards 9 may be A sealing member may be provided on the upper surface side of the portion where the sides are adjacent to each other.

Further, in the present embodiment, the gummed tape 16 is provided as a sealing member for sealing the upper surface side of the adjacent portion of the adjacent second floor base board 9, but the sealing member is not limited to the gummed tape 16, Other sealing members (for example, caulking material) may be used as long as they can prevent the base paper 12 from peeling off.

Further, in the present embodiment, the paper layer 9a is provided on the top layer of the second floor base board 9, but the paper layer 9a is not limited to this, and for example, both the bottom layer and the top layer of the second floor base board 9 are provided. A glass fiber layer 9b may be provided.

Further, in the present embodiment, the glass fiber layer 9b is provided at the lowest layer of the second floor base board 9, but the present invention is not limited to this, and the second floor base board 9 has at least the glass fiber layer 9b. All you have to do is stay there. For example, the glass fiber layer 9b may be provided as an intermediate layer in the thickness direction of the second floor base board 9.

Further, in the present embodiment, the plurality of flooring materials 4 are constituted by the first floor substrate board 8, the second floor substrate board 9, and the floor finishing material 10, but the present invention is not limited to this. It is sufficient that the base board 8, the second floor base board 9, and the floor finishing material 10 are included.

Although the present invention has been described above based on the above-described embodiments, the present invention is not limited to the contents of the above-described embodiments, and can of course be modified as appropriate without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operational techniques, etc. made by those skilled in the art based on this embodiment are included in the scope of the present invention.

Hereinafter, the present invention will be described in detail by giving examples. Note that the present invention is not limited to the examples shown below.

Sound evaluation was performed using the floor structures of Example 1, Example 2, Comparative Example 1, and Comparative Example 2. In Example 1, Example 2, Comparative Example 1, and Comparative Example 2, among the plurality of floor materials, the first floor base board and the floor finishing material are the same, and the second floor base board is different. The first floor base board used was a particle board with dimensions of short side x long side x thickness of 600 mm x 1820 mm x 20 mm. Furthermore, the floor finishing material used was a flooring material with a thickness of 12 mm. Further, the spacing between the floor support legs was set to 455 mm in the short side direction of the first floor base board, and 623 mm in the long side direction of the first floor base board.

The second floor subboard of the floor structure of Example 1, like the second floor subboard described in the above embodiment, has a paper layer as the top layer and the second layer from the bottom, and a glass fiber layer as the bottom layer. , is a gypsum board with a gypsum layer in the middle layer between the upper and lower paper layers. This second floor subboard has a thickness of 12.5 mm, a weight of 25.8 kg/sheet, and a specific weight of 1.25 g/cm ³ .

The second floor subboard of the floor structure of Example 2, like the second floor subboard described in the above embodiment, has a paper layer as the top layer and the second layer from the bottom, and a glass fiber layer as the bottom layer. , is a gypsum board with a gypsum layer in the middle layer between the upper and lower paper layers. This second floor subboard has a thickness of 9.5 mm, a weight of 19.7 kg/sheet, and a specific weight of 1.25 g/cm ³ .

The second floor base board of the floor structure of Comparative Example 1 is a gypsum board in which the uppermost layer and the lowermost layer are paper layers made of board base paper, and the middle layer is a gypsum layer. This second floor subboard has a thickness of 9.5 mm, a weight of 15.7 kg/sheet, and a specific weight of 1.1 g/cm ³ .

The second floor subboard of the floor structure of Comparative Example 2 is a gypsum board having a layer containing a nonwoven fabric. This second floor subboard has a thickness of 9.5 mm, a weight of 19.0 kg/sheet, and a specific weight of 1.21 g/cm ³ .

The sound of the floor structures of Example 1, Example 2, Comparative Example 1, and Comparative Example 2 when walking and when stepping on the floor structures was sensory evaluated in three stages by a panel of 10 people. The details of each evaluation are as follows.
○: When the number of people who rated “I am concerned about the noise” is 1 or less △: When the number of people who rated “I am concerned about the sound” is 2 to 7 people ×: When the number of people who rated “I am concerned about the noise” When the number of people evaluated is 8 or more

The results obtained are shown in Table 1.

From the above, it was confirmed that the floor structure according to the present disclosure can suppress the generation of sound from the floor during walking.

1: Floor structure 2: Floor slab 3: Floor support leg 4: Flooring material 8: First floor base board 9: Second floor base board 9a: Paper layer 9b: Glass fiber layer 9c: Plaster layer 10: Floor finishing material 12 : Board paper (paper)
13: Glass fiber net (glass fiber)
16: Gum tape (sealing member)

Claims (8)

A floor structure in which a plurality of flooring materials are stacked and laid on top of floor support legs erected on a floor slab,
The plurality of flooring materials include a first flooring board supported from below by the floor support legs, a second flooring board disposed above the first flooring board, and the second flooring board. and a floor finishing material that is placed above the floor surface and constitutes the floor surface,
A floor structure characterized in that the second floor base board is a layered gypsum board having a glass fiber layer containing glass fibers. The floor structure according to claim 1, wherein the glass fiber layer of the second floor subboard is provided below the center of the second floor subboard in the thickness direction. The floor structure according to claim 2, wherein the glass fiber layer of the second floor subboard is provided at the lowest layer of the second floor subboard. The floor structure according to any one of claims 1 to 3, wherein the second floor base board has a paper layer provided as an uppermost layer and made of paper. A plurality of the second floor base boards are provided adjacent to each other,
The floor structure according to claim 4, wherein a sealing member is provided on the upper surface side of adjacent portions of the plurality of second floor base boards. The floor structure according to any one of claims 1 to 5, wherein the glass fibers of the glass fiber layer of the second floor base board are a glass fiber net provided in a grid pattern. . The floor structure according to any one of claims 1 to 6, wherein the thickness of the second floor base board is set to 9.5 mm or more. The floor structure according to any one of claims 1 to 7, wherein a specific weight of the second floor base board is set to 1.25 g/cm ³ .

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