JP2006144339A - Reduced noise floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor impact sound reducing structure dispersing and transmitting impact force applied to any part of a floor, and allowing a polymeric fiber material to function also as a damper. <P>SOLUTION: In the floor impact sound reducing structure of a multiple dwelling house or a detached house, a rubber vibration isolator 4 and the polymeric fiber material 1 are arranged between joists or a floor slab 3 and a flooring material 2, and the polymeric fiber material 1 is compressed to the extent of bearing a part of compressive load applied to the rubber vibration isolator 4, and formed into surface vibration control structure to have a spring function and a damping function. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for reducing floor impact noise on upper and lower floors of an apartment house or a detached house.

  Anti-vibration rubber (cushion rubber) system and coil spring system that are inserted into the floor slab and floor material as exemplified in Fig. 1 as a structure for reducing floor impact sound that is put into practical use mainly for apartment buildings. is there. Recently, there has been a demand for higher vibration insulation performance and further floor impact sound reduction performance for heavy impact sound, but there is a limit to a single material as shown in FIG. In particular, the reduction performance cannot be exhibited for the first wave of impact force.

  In the conventional structure as shown in FIG. 1, it acts on the floor impact as shown in FIG. 2, and the floor impact sound varies depending on which point of the floor the floor impact is applied to. Since the impact force concentrates on the rubber constant and is transmitted to the floor slab, it becomes a detrimental factor in its reduction performance, especially for weight impact.

  There is a method to soften the anti-vibration rubber and the metal spring as a method for improving the performance of reducing the floor impact sound, but there are limitations due to concerns about durability and unstable walking ability. Furthermore, there is an example in which a rock wool or glass wool compressed as a spring material is used, but there are many problems in terms of durability and performance, and it is not widely used.

  Furthermore, if a spring material is inserted between the floor slab and the floor material, a space is created, and when a floor impact is received, a standing wave is generated in the space, which adversely affects the floor impact noise reduction performance in the downstairs. In order to prevent this, sound-absorbing material is arranged in the space, but standing waves cannot be removed sufficiently only by partial arrangement.

  Although there is a growing need for detached houses due to the display of housing performance, a well-suited one has not been developed yet. In order to solve the above problems, the present invention provides a new floor impact noise reduction structure.

  The gist of the present invention is a structure for reducing floor impact sound of an apartment house or a detached house, wherein a vibration-proof rubber and a polymer fiber-based material are disposed between a joist or floor slab and a floor material, and the polymer The fiber-based material provides a low-noise floor structure that is compressed to the extent that it partially bears the compressive load on the anti-vibration rubber to form a surface anti-vibration structure, and has a spring function and a damping function. is there.

  The vibration isolating rubber and the polymer fiber sound absorbing material may be arranged separately, or may have a structure in which the vibration isolating rubber is embedded in the polymer fiber sound absorbing material and integrated. The polymer fiber material is preferably a polyester fiber material.

  In the floor impact noise reduction structure of the present invention, the impact force is distributed and transmitted wherever the floor is applied, and the polymer fiber material also functions as a damper. Reduction is achieved.

  In the present invention, the vibration-isolating rubber and the polymer fiber material have a surface vibration-proof support that shares the impact force, and the polymer fiber material has a damper function and a sound absorbing function. It was possible to provide a floor system that effectively reduces the floor impact sound including the first wave of impact force by dispersing and relaxing the force and suppressing the generation of standing waves in the space.

  By adopting the above configuration, the impact force is dispersed and transmitted to the floor slab or joist regardless of where it is applied to the floor, and the polymer fiber material can be used as a damper for the impact force (especially the first wave). Function. Specifically, the polymer fiber materials are rock wool, glass wool, and pet wool, and not only have a sound absorbing function, but also compress them to such a degree as to partially bear the compressive load applied to the anti-vibration rubber, A spring function and a damping function are provided. For example, the polymeric fiber-based material may be used after being compressed to a bulkiness of 5 to 80%, preferably: a bulkiness of 5 to 30%. A typical example of the polymer fiber-based material is a PET (polyester fiber) -based material that can be recycled and is excellent in sound absorption performance, durability, and weather resistance, and is one of preferable materials.

  Furthermore, there are two types of noise transmitted downstairs: solid-borne sound transmitted through anti-vibration rubber (support legs) and air-borne sound transmitted through the space under the floor. In the floor structure of the present invention, an anti-vibration rubber is interposed between the floor and the floor slab, and the solid propagating sound generated by the impact on the floor is absorbed by the anti-vibration rubber to block the noise propagation to the downstairs. On the other hand, with regard to air-borne sound, a sound absorbing material (polymer fiber-based material) is placed under the floor to block it, and both are used together to further improve the soundproofing effect.

  In addition, the anti-vibration rubber and polymer fiber materials make up and share the anti-vibration structure against the impact force, so the spring constant of the anti-vibration rubber can be lowered and walking stability deteriorates. Thus, the natural frequency of the entire system can be lowered without improving the vibration insulation performance against the impact force. In particular, since the polymer fiber material is excellent in sound absorbing performance, it is also possible to prevent the formation of a standing wave generated between the floor material and the floor board.

  The vibration-isolating rubber and the polymer fiber-based sound absorbing material may be combined separately or may be integrated by embedding the vibration-proof rubber in the polymer fiber-based sound absorbing material.

  The basic structure of the invention is shown in FIGS. The polymer fiber material 1 is used between the flooring 2 and the floor slab 3 (or joist) in contact with both, and is compressed appropriately, and the floor impact force is appropriately shared with the anti-vibration rubber 4 and the impact force. Anti-vibration structure.

  In FIG. 3, the polymer fiber material 1 and the vibration isolating rubber 4 are completely independent. FIG. 4 shows that the vibration isolating rubber 4 is embedded in the polymer fiber sound absorbing material 1 and integrated. It has a structured structure.

  FIG. 5 shows a third example of the present invention, in which the flooring 2 is supported by a vibration-proof rubber 4 provided with bolt-shaped legs 5, and the polymer fiber material 1 is compressed by 20%. Specifically, the floor material 2 is a waterproof floor pan made of FRP, and is provided with a plurality of vibration-proof rubbers 4 provided with bolt-shaped legs 5, and the polymer fiber material 1 has a cross section of 100 × 100 cm. This is an example of 20% compression.

  The anti-vibration rubber 4 used here is an anti-vibration rubber having a natural frequency of 20 Hz, and the polymer fiber material 1 is a polyester fiber.

  FIG. 6 is a schematic diagram showing the characteristics of the low noise floor structure of the present invention. The impact force (sound) applied to the flooring 2 is not only transmitted to the floor slab 3 through the anti-vibration rubber 4 but also to each anti-vibration. The polymer fiber material 1 filled between the vibration rubbers 4 is also transmitted to the floor slab 3 and forms a surface vibration-proof structure. In other words, a parallel circuit is formed for the propagation of sound. The surface vibration-proof structure is completed here, so that no load is concentrated on the vibration-proof rubber part and The damper function was also exhibited.

  The result of comparing the floor impact noise reduction effect of the conventional structure and the structure of the present invention with an experimental model as shown in FIG. The conventional structure is a structure without the polymer fiber material 1 in FIG.

  FIG. 8 shows a time waveform of the impact force. In contrast to the conventional structure in which the first wave of the impact force is not significantly reduced, the structure of the present invention is effectively attenuated, and the present invention is effective. It shows that there is. Further, as shown in FIG. 9, as a result, the floor impact sound is also effectively reduced as compared with the conventional structure, indicating the superiority of the structure of the present invention.

  The polymer fiber-based material is used in a moderately compressed state between the flooring and the floor slab or joist, and has a surface vibration isolation structure that appropriately shares the floor impact force with the vibration isolation rubber. An extremely excellent effect for reduction can be obtained. This field can be used in a wide range of fields such as vibration isolation and vibration isolation racks in the field of equipment in addition to the housing and construction fields.

FIG. 1 is a sectional view showing a conventional floor structure. FIG. 2 is a conceptual diagram showing a propagation state of the impact sound in FIG. FIG. 3 is a front view showing the floor structure of the first example of the present invention. FIG. 4 is a front view showing the floor structure of the second example of the present invention. FIG. 5 is a transmission diagram showing the floor structure of the third example of the present invention. FIG. 6 is a conceptual diagram showing the state of propagation of impact sound in the present invention. FIG. 7 shows a model of floor impact sound measurement. FIG. 8 is a time waveform graph of the impact force of the floor structure in the present invention. FIG. 9 is a graph showing the impact noise reduction effect of the floor structure according to the present invention.

Explanation of symbols

1. Polymer fiber material,
2 ... flooring,
3 ... floor slab,
4. Anti-vibration rubber,
5 ... Bolt-shaped legs.

Claims (4)

  It is a structure for reducing floor impact sound of apartment houses or detached houses, in which anti-vibration rubber and polymer fiber material are placed between joists or floor slabs and floor material, and the polymer fiber material is anti-vibration A low-noise floor structure that is compressed to the extent that it bears a part of the compression load applied to the rubber to create a surface vibration-proof structure, and has a spring function and a damping function.   The low-noise floor structure according to claim 1, wherein the vibration-proof rubber and the polymer fiber-based sound absorbing material are arranged separately.   The low-noise floor structure according to claim 1, wherein the vibration-proof rubber and the polymer fiber-based sound absorbing material are formed by embedding a vibration-proof rubber in the polymer fiber-based sound absorbing material. 2. The low noise floor structure according to claim 1, wherein the polymer fiber material is a polyester fiber material.

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