JPH0972016A - Sound insulating floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulating floor structure with ease to construct on a floor at a low cost and high sound insulating performance. SOLUTION: A sound insulating structure S is adhered and mounted to a concrete stab or a wooden floor to be insulated from sound. The sound insulating structure S is formed with gypsum boards 5, water-proof plywoods 1 mounted on the upper and lower faces thereof, a foamed polystyrene mat 6 laid between the gypsum boards 5 and three-layer mortared metal lath 7. The gypsum board 5 has a number of depressions 5' in the mating face, the area of the depression 5' being 1cm<2> -2cm<2> and an interval between the depressions being 4cm-6cm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation floor structure which is attached to a floor surface of a building for sound insulation of sound passing through the floor.

[0002]

2. Description of the Related Art In order to prevent various noises in houses and factories, various sound insulating structures for insulating the wall surfaces of these structures have been proposed. On the other hand, although a lot of noise is transmitted through the floor of the building, a sound insulation floor structure which is low in price and has sufficient sound insulation performance has not been proposed yet.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sound insulation floor structure which has a simple structure, is inexpensive, does not use a special material, and has excellent sound insulation performance.
Another object of the present invention is to provide a sound insulation floor structure that can be easily installed on any floor surface without requiring any special tool.

[0004]

In order to solve the above-mentioned problems, the present invention interposes between at least two gypsum boards in which a plurality of recessed surfaces face each other and the two are laminated. Provided is a sound insulation floor structure having a structure including a sound insulation plate made of the expanded polystyrene mat, at least three metal laths with mortar, and a waterproof plywood attached to cover the upper and lower surfaces of the sound insulation plate.

According to this sound-insulating floor structure, the sound waves trying to penetrate through the sound-insulating floor structure are scattered twice in multiple directions by the depressions provided in the stacked gypsum boards, and are scattered. The sound waves are effectively absorbed and attenuated by the expanded polystyrene mat and the at least three metal laths with mortar interposed between the gypsum boards.

It is preferable that the gypsum board used in the sound insulation floor structure of the present invention has an area of 1 cm ^{2 to 2} cm ^{2 and} the distance between adjacent ones is 4 to 6 cm.
According to the study of the present inventor, which was carried out while confirming by repeated experiments, even if the area of the depression of the gypsum board is smaller or larger than that described above, the sound wave is diffused by diffuse reflection to provide effective sound insulation. I can't.

If the number and area of the depressions are too large, the thickness of the gypsum board becomes thin, the sound penetrating increases, and the strength also decreases. On the other hand, if the gypsum board is thickened, the load on the floor surface to be sound-insulated increases.

Thus, the present invention has high sound insulation performance and
It was possible to provide a sound insulation floor structure that balances strength, weight, and price.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a sound insulation floor structure according to the present invention will be described in detail with reference to the illustrated embodiments. 1 and 2, G indicates a floor such as a concrete slab or a wooden floor to be sound-insulated, and a sound-insulating floor structure S is attached on the floor G by an adhesive. The sound-insulating floor structure S has a gypsum board 5, a polystyrene foam mat 6 interposed between the gypsum boards 5, and a sound-insulating plate composed of three metal laths 7 with mortar, and the sound-insulating plates are provided above and below the sound-insulating plate. The water-resistant plywood 1 having the tongue-and-groove portion 2 bonded thereto is attached to form a sound insulation floor structure S.

In the figure, 3 is an outer frame material control panel, and 4 is an intermediate panel. The size of the sound insulation floor structure S is, for example, 900 mm ×
It is 900 mm, and the periphery thereof is framed by the outer frame 3, and a predetermined number of sheets are sequentially spread on the floor G. The gypsum board 5 has a thickness of 6 to 7 mm, and each of the surfaces facing each other has an area of 1 cm ^{2 to 2} cm ² , and a large number of depressions 5 ′ formed with an interval between adjacent ones of 4 cm to 6 cm. have.

The depth of the depression 5'is 1 / thickness of the thickness of the gypsum board.
It is preferably about 3. The recess 5'of the gypsum board 5 is preferably formed by pressing from the surface during board production. The water resistant plywood 1 attached to the upper and lower surfaces of the sound insulation floor structure S attached to the concrete slab or the wooden floor G in this way has a thickness of 4 mm, and is appropriately bonded by nailing or woodworking bond. You can install it.

Further, the three metal laths 7 with mortar to be interposed between the gypsum boards 5 are stacked, and are attached so as to be embedded in the expanded polystyrene mat 6, and then the upper gypsum board 5 is attached with a mac.

The illustrated sound insulation floor structure has the above-mentioned structure, and sound waves that try to pass through the floor surface G are scattered by a large number of recesses 5'formed on the inner surface of the gypsum board 5, and these are plastered. The expanded polystyrene mat 6 disposed inside the board 5 and the metal lath 7 with three mortar layers are absorbed, attenuated and insulated.

The sound insulation floor structure according to the present invention has been specifically described above based on the illustrated embodiment, but the device of the present invention is not limited to this embodiment, and various modifications may be made. Needless to say.

For example, in the above-described embodiment, one expanded polystyrene mat 6 and 3 are provided between the gypsum boards 5, respectively.
Although the number of metal laths 7 with mortar is attached, the number of metal laths 7 may be more than this number as long as the thickness is allowed. Further, the thickness of the gypsum board 5 or the entire sound insulating plate may be selected as an appropriate value in consideration of the sound pressure to be sound-insulated and the strength of the wall surface. Furthermore, although the case where the recesses formed in the gypsum board 5 are circular has been described, the shape of the recesses may be triangular, square or rectangular.

[0015]

INDUSTRIAL APPLICABILITY As described above, the sound insulation floor structure according to the present invention uses a general material such as gypsum board, expanded polystyrene mat and metal lath with mortar, and can be inexpensively constructed. Further, the construction can be easily performed by adhesion, and the floor surface to be attached is not limited. In addition, gypsum board, expanded polystyrene mat, metal lath with mortar, etc. also have the advantage of providing a heat insulating effect. Furthermore, since the metal lath comes with mortar, it has the effect of preventing rust.

According to the results of the inventor, the sound insulation effect of the sound insulation floor structure according to the present invention was satisfied with the following specifications. Two 6-7 mm-thick gypsum boards with depressions were placed on the concrete floor surface facing each other with the depressions facing each other. An expanded polystyrene mat and a three-layered metal lath with mortar were sandwiched between them to make the total thickness 18 mm. 4 on the top and bottom respectively
mm water resistant plywood was attached. The size of the depressions formed on the gypsum board was about 1.77 cm ² , the depth of the depressions was 1/3 of the thickness of the board, and the distance between the depressions was 50 mm.

[Brief description of drawings]

FIG. 1 is a perspective view of a sound insulation floor structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the sound insulation floor structure shown in FIG.

[Explanation of symbols]

 G floor S sound insulation structure 1 waterproof plywood 2 tongue-and-groove part 3 outer frame material control panel 4 middle glazed 5 gypsum board 5'recess 6 expanded polystyrene mat 7 metal lath with mortar

Claims (1)

[Claims] 1. A sound-insulating floor structure to be mounted on a floor of a building, wherein at least two gypsum boards are laminated with the surfaces having a large number of depressions facing each other, and the gypsum board is interposed between the gypsum boards. A sound insulation floor structure comprising a foam polystyrene mat, a sound insulation plate composed of at least three metal laths with mortar, and a waterproof plywood covering the upper and lower surfaces of the sound insulation plate.