JPH07259313A - Soundproof floor structure - Google Patents

Abstract

PURPOSE:To lower a floor impact sound sepcially a heavy weight impace sound by providing a finish material on a floor setting bed face material formed of a particle board, etc., placed on a concrete floor through a foam with specific thickness. CONSTITUTION:A floor setting bed face material formed of a particle board, etc., is placed on a concrete floor constructional body such as an apartment house, etc., through an elastic body such as rubber, etc., and a bearing leg. A polyethylene resin foam having apparent specific gravity 0.05-0.2g/cm<2> not more than 2mm in thickness is placed between a permanent cladding plate on the floor setting bed face material and finish material. A floor impact sound specially a heavy weight impact sound upstairs is not transferred downstairs. According to the constitution, the soundproof effect can be promoted in the apartment house.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof floor base structure. More specifically, the present invention relates to a new soundproof floor base structure which is useful for reducing floor impact noise, particularly heavy impact noise in a concrete floor structure such as an apartment house.

[0002]

2. Description of the Related Art With the recent increase in interest in wooden floors, floor impact noise, which affects the downstairs, has become a problem, especially in apartment buildings. Therefore, as a problem peculiar to wooden floors, a wooden soundproof floor has been developed to reduce the lightweight impact sound generated by people walking or falling objects.
The impact noise has been reduced to the level of L-40 (special design grade of Architectural Institute of Japan) with the sound insulation grade shown in SA 1419.

[0003]

However, even with such an improved soundproof floor, the weight impact sound generated by the children's bounce and running around is determined by the performance of the skeleton (floor structure) such as concrete. Only the soundproof performance is achieved. In fact, for example, the body is 150m
In case of concrete slab with thickness m, it is L-
It is only 55 (Architectural Institute of Japan Design Guide Level 2). That is, even if the lightweight impact sound has a high sound insulation performance, there is a big problem in life against the heavy impact sound.

As a conventional floor structure for reducing heavy impact noise, as shown in FIG. 11, a cushioning material (a) such as glass wool or rock wool is placed on a floor structure (a) such as concrete. A floating floor structure is known in which heavy surface material (c) such as concrete or wood is loaded on the surface, but if the surface material (c) is concrete, it will be a wet construction method. Since it has multiple layers to secure high weight, the construction is complicated.

Even when a wood material is used as the face material instead of concrete, the fact is that it is not an effective means for reducing the weight impact noise. This invention
The present invention has been made in view of the circumstances as described above, overcomes the drawbacks of the prior art, has an excellent soundproofing effect not only for light-weight impact sound but also for heavy-weight impact sound, and particularly L-52 or less. The purpose is to provide a soundproof floor base structure that achieves a level and is easy to construct.

[0006]

In order to solve the above problems, the present invention provides a floor structure having an elastic body arranged on the floor structure and a floor surface supported by support legs, in which the floor surface is 2m thickness between the plywood and finishing material
Provided is a soundproof floor structure in which a foam having a size of m or less is provided.

In the present invention, in the above floor structure, the foam has an apparent density of 0.05 to 0.
One of the preferred embodiments is that the foam has a content of 2 g / cm ³ , the foam is made of a polyethylene-based resin as a main component, and an inorganic compound is added to the foam.

[0008]

In the present invention, as shown in FIG. 1, for example, an elastic body such as rubber and supporting legs are arranged on a floor structure made of concrete or the like, and a particle board, plywood or the like is arranged thereon. A foam having a thickness of 2 mm or less is arranged between the finishing material and the disposing laminating board on the floor base material, such as particle board, of the floor structure in which the floor surface is formed.

With this floor structure, the heavy impact sound is improved by about 1 dB in the frequency range of 63 to 125 Hz. In addition, regarding light impact sound, 12
An improvement of about 1 to 5 dB can be seen in the frequency range of 5 to 500 Hz. This improvement in soundproofing is due to the foam placed between the finishing material and the laminating board, and the effect of propagating and insulating the impact force applied to the surface of the finishing material to the laminating board can be seen. The impact force propagating to (particle board) is reduced.

Since the propagation amount of the impact force to the floor base material (particle board) is reduced, the vibration of the floor base material (particle board) is reduced, so that the air of the impact force from the floor base material to the floor structure is reduced. The amount of propagation is reduced, and the floor impact sound is reduced in the downstairs. The foam has a thickness of 2 mm or less. Various foams such as polyethylene-based, polystyrene-based, and polyurethane-based can be used. Among them, a polyethylene-based resin and an inorganic filler having a thickness of 2 mm or less and a density of 0.05 to 0.2 are used.
It is preferable that the sheet is g / cm ³ or less.

As the thickness increases, the surface of the flooring material becomes soft and the feeling of walking becomes poor, and the load bearing performance for heavy furniture and the like is deteriorated. 0.05g / cm ^{3 for} density
In the following, the surface of the floor material becomes soft and the same problem as the increase in thickness occurs. When the density is 0.2 g / cm ³ or higher, problems of cost and workability occur.

Further, the base structure of the present invention is easy to construct and has a sufficient load capacity for heavy furniture.
In the floor structure of the present invention, a porous body may be arranged on the floor structure in order to further improve the soundproof performance. Regarding the arrangement of the porous bodies in this case, various modes such as arrangement in a streak shape or a piece shape are possible. The porous body itself is not limited to glass wool and rock wool as long as it has excellent sound absorbing performance and is lightweight, and various natural or synthetic fiber agglomerates, block bodies and the like can be used.

Of course, the elastic body of the present invention may have various hardnesses and types, and is appropriately selected as a material satisfying the spring constant of the base material. The same applies to the individual configurations of the face material. Further, the support legs may have an adjuster structure for adjusting the unevenness.

Examples will be shown below to describe the soundproof floor structure of the present invention in more detail.

[0015]

Example 1 As illustrated in FIG. 2, an elastic rubber (hardness: 60 degrees) is arranged on a floor structure of RC concrete 150 mm thick, and 20 mm is provided through a supporting leg having a function of adjusting the unsteadiness. On a floor base material made of thick particle board, a disposing laminated board and a surface finishing material having a foam adhered on the back surface were arranged.

The structural conditions were as follows. <Surface material thickness> Surface finishing material 5.5 mm Foam 1.5 mm Disposable plywood 12 mm Particle board 20 mm (3 x 3 sh) <Foam> Polyethylene resin foam: Apparent density 0.
09 g / cm ³ , compression hardness 0.8 kg / cm ² , compression modulus 9.7 kg / cm ² , tensile strength 8.9 kg / c
m ² , tensile elongation 107% (manufactured by Lion Corporation, F-1.
5N (JT) <Support legs> Support legs with unsteady adjustment function using bolts Floor pocket 140mm <Rubber> Vibration-proof rubber 60 degree rubber particle board 1
4 pieces used per sheet The spring constant of the base material per unit area is 1.
It was set to 4 × 10 ⁶ (N / m / m ² ).

In this soundproof floor structure, the sound insulation grade of heavy impact sound was L-52. Moreover, the sound insulation grade of the lightweight impact sound was L-47. FIG. 3 shows the soundproof performance. From this result, it was confirmed that a soundproof floor structure having an excellent effect of reducing the weight impact sound was realized. Comparative Example 1 In Example 1, the floor surface was constructed without using the foam. At this time, the sound insulation class of the heavy impact sound was L-53, and the sound insulation class of the light impact sound was L-48.

FIG. 4 shows the soundproofing performance. Example 2 The same structure as in Example 1 was used except that the thickness of the surface finish material was 9 mm. At this time, the sound insulation class of heavy impact sound is L-52, and the sound insulation class of light impact sound is L-47.
Met. FIG. 5 shows the soundproof performance. Comparative Example 2 In the structure of Example 2, the foam was not provided. The sound insulation grade of the heavy impact sound at this time is L-53,
The sound insulation grade of the lightweight impact sound was L-50. FIG. 6 shows the soundproof performance. Example 3 In Example 1, as shown in FIGS. 7 and 8, a porous body made of glass wool having a density of 24 kg / cm ³ , a thickness of 100 mm and a filling rate of 38% was arranged in the floor pocket.

The sound insulation class of heavy impact sound in this structure was L-52, and the sound insulation class of light impact sound was L-43. FIG. 9 shows the soundproof performance. Comparative Example 3 The structure of Example 3 is such that no foam is provided. This product had a sound insulation grade of heavy impact sound of L-53 and a light impact sound of L-45. FIG. 10 shows the soundproof performance. Example 4 The same structure as in Example 1 was used except that the thickness of the foam was 2 mm.

The sound insulation grade of heavy impact sound is L-52,
The sound insulation grade of the lightweight impact sound was 46. Example 5 The same structure as in Example 1 was used except that the thickness of the foam was 0.5 mm and the thickness of the surface finish material was 9 mm.

The sound insulation grade of heavy impact sound is L-52,
The sound insulation grade of the lightweight impact sound was L-47. Comparative Example 4 In Example 1, the foam had a thickness of 2.5 mm.
Although the soundproofing performance was the same, the walking feeling became poor and the load bearing performance against heavy furniture was deteriorated. Example 6 A polyethylene resin foam having an apparent density of 0.15 g / cm ³ was used to obtain the same structure as in Example 1.

The sound insulation grade of heavy impact sound is L-52,
The sound insulation grade of the lightweight impact sound was L-45.

[0023]

As described in detail above, according to the present invention, it is possible not only to provide soundproofing performance of L-47 or less for light weight impact sound, but also sound insulation of heavy impact sound of L-52 or less level. It is possible to reduce the heavy floor impact sound to the downstairs, which is a problem in apartments, by simple construction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating the structure of the present invention.

FIG. 2 is a cross-sectional view illustrating a structure as an example.

FIG. 3 is a diagram showing the soundproofing performance of the structure of FIG.

FIG. 4 is a soundproof performance diagram as a comparative example with respect to the structure of FIG.

FIG. 5 is a soundproof performance diagram of another embodiment.

FIG. 6 is a soundproof performance diagram as a comparative example with respect to FIG.

FIG. 7 is a cross-sectional view showing a structure as an example in which a porous body is arranged.

8 is a perspective view corresponding to FIG. 7. FIG.

9 is a soundproof performance diagram of the structures of FIGS. 7 and 8. FIG.

10 is a soundproof performance diagram as a comparative example with respect to FIGS. 7 and 8. FIG.

FIG. 11 is a cross-sectional view showing an example of a conventional soundproof floor structure.

Claims (3)

[Claims] 1. A floor structure having an elastic body disposed on a floor structure and a floor surface supported by support legs, wherein a thickness of 2 mm is provided between a plywood on a floor base surface material and a finishing material which constitute the floor surface. A soundproof floor structure characterized by being provided with the following foams. 2. The foam has an apparent density of 0.05 to 0.
The soundproof floor structure according to claim 1, wherein the soundproof floor structure is 2 g / cm ³ . 3. The soundproof floor structure according to claim 1, wherein the foam has a polyethylene resin as a main component.