JP2005146697A - Soundproof floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To damp propagation amount of sound from an upper story to a lower story greatly. <P>SOLUTION: This soundproof floor structure is provided with a shock absorbing board 3 composed of a board member 4, a plurality of elastic members 5 provided on a lower face of the board member 4 across an interval, and a sound absorbing material 6 provided between the elastic members 5, and the shock absorbing board 3 is spread on a floor surface 2. A tip part of the elastic member 5 in contact with the floor surface 2 is formed in such a way that it comes into substantially point-contact with the floor surface 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soundproof floor structure, and more particularly to a soundproof floor structure that can greatly attenuate the amount of sound propagation from an upper floor to a lower floor and has excellent soundproof performance.

  The flooring of current detached houses and condominiums is mainly made of wooden flooring. As a soundproofing measure for preventing the sound from propagating from the upper floor to the lower floor of such a multi-story house, there are the following methods.

(1) Absorb the impact on the floor by using a soft flooring.
(2) Use a floor system that raises the floor from the floor.
(3) Lay vibration and sound insulation materials made of rubber or asphalt mat between the flooring and the floor.
(4) Patent Document 1 discloses a soundproof floor structure in which a cylindrical rubber support leg is provided on the lower surface of a floor panel and a sound absorbing material is provided between the rubber support legs.

Japanese Patent Laid-Open No. 5-141077 (page 6, FIG. 1)

  However, the above-described soundproofing method has the following problems.

(1) The method using a soft finish flooring sinks when the flooring is stepped on, and causes a seasickness phenomenon when walking.
(2) In order to improve the soundproofing performance, the floor system increases the floor height when the space between the floor surface and the floor surface is widened, so that the indoor space is narrowed.
(3) The method of laying vibration damping and sound insulation material between the finished flooring and the floor floor can easily improve the sound insulation performance, but if there is no optimum vibration damping and sound insulation material, a great sound insulation effect is expected. Can not.
(4) The method of providing the rubber support leg and the sound absorbing material on the lower surface of the floor panel has a wide contact area with the floor surface because the lower surface of the rubber support leg in contact with the floor surface is formed flat. Therefore, the vibration received from the floor panel is easily propagated to the floor surface. In addition, since the contact area is large, there is a possibility that a gap is formed between the lower surface of the rubber support leg and the floor surface. In this case, the floor panel is not supported well.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

  The invention according to claim 1 comprises an impact absorbing board comprising a plate material, a plurality of elastic members provided at intervals on the lower surface of the plate material, and a sound absorbing material provided between the elastic members, and the shock absorbing board. The board is characterized in that, in a soundproof floor structure laid on a floor surface, a tip portion of the elastic member in contact with the floor surface is formed so as to be substantially in point contact with the floor surface.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the elastic member is made of rubber, the sound absorbing material is made of glass wool, and the plate is made of plywood or particle board.

  The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, a finishing plate is laid on the upper surface of the shock absorbing board via a vibration damping and sound insulating material.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the elastic members are provided in a line at intervals, and a sound absorbing material is provided between the lines. It has the characteristics.

  According to the present invention, the amount of sound propagation from the upper floor to the lower floor can be greatly attenuated.

  Next, one embodiment of the soundproof floor structure of the present invention will be described with reference to the drawings.

  1 is a cross-sectional view showing a soundproof floor structure of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a view taken along line AA in FIG.

  In FIG. 1 to FIG. 3, 1 is a joist, 2 is a floor surface made of plywood constructed on the joist 1, and 3 is an impact absorbing board laid on the floor surface 2.

  The shock absorbing board 3 includes a plate member 4, a plurality of elastic members 5 fixed to the lower surface of the plate member 4 with an adhesive and the like, and a sound absorbing member 6 provided between the elastic members 5. Yes.

  The plate material 4 is made of, for example, a structural plywood or a particle board, has a thickness of 9 mm or more, and has vertical and horizontal sizes of 455 mm or more from the viewpoint of workability and performance.

  The elastic member 5 is made of, for example, natural rubber, SBR (styrene butadiene rubber, NBR (nitrile butadiene rubber), CR (chloroprene rubber), BR (butadiene rubber), IR (isoprene rubber), and has flatness as a flooring material. In order to make it easy to absorb the strength and impact to be maintained, it has a hardness of 40 degrees to 90 degrees, and the tip portion (lower surface) of the elastic member 5 that contacts the floor surface 2 has a tapered shape and the floor surface 2. The reason is that the contact area with the floor surface 2 has a smaller effect in reducing vibration received from the plate material 4 and that the tip portion is tapered and the floor surface 2 In the case where it is formed so as to be almost point contact with the flat surface, there is a possibility that there is a gap between the tip portion and the floor surface 2, and in this case, the plate material 4 is not supported well. That's true. The shape of the part is preferably a nipple shape or a triangular pyramid shape, and the mounting position of the elastic member 5 is set at a constant interval in order to ensure the load bearing performance of the floor and to absorb the floor impact. The distance is preferably 100 mm to 500 mm, and the height of the elastic member 5 is preferably 10 mm to 50 mm.

  The sound absorbing material 6 is made of, for example, a foam or a fibrous material, but the sound absorbing performance is improved by using the fibrous material. As the fibrous material, plate-like glass wool or non-woven fabric is preferable for preventing breakage during transportation and handling.

  7 is a vibration-damping / sound-insulating material laid on the shock-absorbing board 3, and a high specific gravity powder such as iron powder is kneaded with a rubber-based, plastic-based or asphalt-based binder to improve soundproofing performance. It is made of a plate shape.

  Reference numeral 8 denotes a finishing plate such as flooring laid on the vibration damping / sound insulating material 7.

  According to the soundproof floor structure of the present invention configured as described above, the sound from the finishing plate 8 is absorbed by the vibration damping / sound insulating material 7 and the shock absorbing board 3, and the amount of propagation to the floor surface 2 is remarkably large. Attenuates. In particular, the damping effect is enhanced by forming the tip portion of the elastic member 5 in a tapered shape so as to be substantially in point contact with the floor surface 2.

  Next, the present invention will be further described with reference to examples.

  The test body of the present invention having the soundproof floor structure shown in FIGS. 1 to 3 was produced as follows.

The elastic member 5 was made of natural vulcanized rubber and had a rubber hardness of 60 degrees with nipple-like protrusions formed. The elastic member 5 is tacked to the lower surface of the plate member 4 made of particle board at a pitch of 285 mm, and the sound absorbing material made of plate-like glass wool (15 × 910 × 230 mm, 30 kg / m ³ ) is formed on the lower surface of the plate member 4 between the elastic members 5. 6 stopped tacker. The shock absorbing boards 3 thus produced were laid on the floor 2 with the elastic member 5 facing down.

  Then, a flooring (12 × 303 × 1820 mm) as a finishing plate 8 was laid on the impact absorbing board 3 via a vibration damping / sound insulating material 7 and secured with a nail to produce a test specimen of the present invention. The vibration damping / sound insulating material 7 (8 × 455 × 910 mm, 9.9 kg / sheet) was prepared by heating and kneading iron oxide powder to asphalt as a binder and covering both surfaces with a nonwoven fabric.

  Next, as Comparative Example 1, the same flooring as used in the test specimen of the present invention was nailed on the floor surface 2 to produce a comparative test specimen.

  And this invention test body and the comparative test body were constructed in the conventional framed wooden house, and the floor impact sound insulation performance was measured based on JISA1418. The results are shown in Table 1. In Table 1, a heavy floor impact sound is an impact sound caused by jumping or the like, and a light floor impact sound is an impact sound caused by a fall of an object.

  As is clear from Table 1, it was found that the test specimen of the present invention was improved by 3 ranks for the heavy floor impact sound and 4 ranks for the lightweight floor impact sound compared to the comparative test specimen.

It is sectional drawing which shows the soundproof floor structure of this invention. It is the elements on larger scale of FIG. It is an AA arrow line view of FIG.

Explanation of symbols

1: joist 2: floor surface 3: shock absorbing board 4: plate material 5: elastic member 6: sound absorbing material 7: vibration damping and sound insulating material 8: finishing plate

Claims (4)

A shock absorbing board comprising a plate material, a plurality of elastic members provided at intervals on the lower surface of the plate material, and a sound absorbing material provided between the elastic members, wherein the shock absorbing board is laid on the floor surface. In the soundproof floor structure,
The soundproof floor structure, wherein a tip portion of the elastic member in contact with the floor surface is formed so as to be substantially in point contact with the floor surface.   The soundproof floor structure according to claim 1, wherein the elastic member is rubber, the sound absorbing material is glass wool, and the plate is made of plywood or particle board.   The soundproof floor structure according to claim 1 or 2, wherein a finishing plate is laid on the upper surface of the shock absorbing board via a vibration damping and sound insulating material.   The soundproof floor structure according to any one of claims 1 to 3, wherein the elastic members are provided in a row at intervals, and the sound absorbing material is provided between the rows.

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