JP2834900B2 - Floor material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material for forming a double floor, and more particularly to a technique for improving soundproofing performance.

[0002]

2. Description of the Related Art In recent years, double-floor floors have been rapidly spread due to their ability to provide underfloor piping in apartment buildings and the like, and have good workability. This thing is to be laid so that a plurality of supporting legs of the floor material, which are formed by projecting the supporting legs from a plurality of lower surfaces of the base material, are placed on a floor base such as a concrete slab or the like, Elastic rubber provided at the lower end of the support leg ensures soundproofing against floor impact.

[0003]

By the way, the vibration propagation mechanism of the double floor against the weight impact is such that the floor ground vibrates and radiates sound by transmitting from the impacted base material to the supporting legs. Normally, sound insulation is obtained by vibration insulation of elastic rubber provided at the lower end of the support leg. This vibration isolation action depends on the spring constant of the elastic rubber and is proportional to the stored energy E _k of the elastic rubber. The storage energy E _k of the elastic rubber per support leg is expressed by a formula of E _k = １ ／ KX ² by the spring constant K and the displacement X of the elastic rubber. It can be seen that, if the number of supporting legs for receiving the impact load is increased, the storage energy E _k of the entire elastic rubber is increased, the vibration insulation action is increased, and the soundproofing is improved.

[0004] However, if the support legs are arranged close to the side edge of the base material within a length range of less than 13% of the vertical or horizontal dimension of the base material, it is considered from the bending rigidity of the base material. As a result, the number of supporting legs for receiving the impact load is reduced, and the storage energy E _k of the entire elastic rubber is reduced. In addition, if the arrangement of the support legs is concentrated, a problem occurs in the stability of the double floor. Further, if the support legs are too far apart, the vibration of the base material caused by the impact becomes low in frequency, which promotes floor impact noise. Here, if the positions of the adjacent support legs are too close to each other, it becomes equivalent to one-point support, the bending vibration of the base material becomes low frequency, and the soundproofing performance is reduced. Although the soundproofing performance against light impact sound can be relatively secured by elastic rubber, the soundproofing of heavy impact sound such as children jumping and running around is low, and the soundproofing is worse than that of the floor base without laying floor material There was a problem of becoming.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to reduce the impact noise and the weight impact noise to achieve a high impact noise absorption performance while satisfying the basic performance such as load resistance and strength. It is intended to provide flooring.

[0006]

According to the present invention, in order to achieve the above object, a support leg 2 having a height adjustable and projecting downward from a proper position on the lower surface of a base material 1 is placed on a floor substrate 3. A floor material to be placed and installed, wherein the support legs 2 are arranged inside the side ends of the base material 1 in a length range L of 13% to 22% of the vertical or horizontal dimension of the base material 1. It is.

[0007]

The position of the supporting leg 2 is set within the length range L of 13% to 22% of the vertical or horizontal dimension of the base material 1.
By distributing and disposing them inside the side end of the base material, the vibration insulation effect is improved, and furthermore, the bending vibration of the base material 1 can be made higher in frequency, and the soundproofing property against weight impact particularly improves.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. 1 and 2 show a first embodiment of the present invention. The flooring comprises a base material 1 and support legs 2 projecting downward from a plurality of lower surfaces of the base material 1. Substrate 1
Is, for example, a particle board 1 having a vertical and horizontal dimension of 900 mm.
a, a plywood 1b and a surface material 1c are laminated, and the particle board 1a has a thickness of 20 mm, and the plywood 1b has a thickness of 12 mm.
A wooden floor having a thickness of 12 mm is used as c. Support leg 2 projecting downward from the lower surface of substrate 1
Is adjustable in height, and provided at its lower end with an elastic rubber 4 having a vibration absorbing property. The elastic rubber 4 is placed on a floor substrate 3 such as a concrete slab and constructed. It has become. As shown in FIG. 2, the support leg 2 is disposed inside the side end of the substrate 1 in a length range L of 13% to 22% of the vertical or horizontal dimension of the substrate 1. Support leg body 2 having a diameter of 25 mm and a height of 125 mm as support leg 2
The support leg 2 is provided at the lower end of the support leg 2 having a hardness of 60 degrees and made of natural rubber having a diameter of 50 mm and a height of 30 mm made of natural rubber. The floor impact sound levels in the weight impact when placed inside the side end of the base material 1 in the length range L of about 140 mm) and 18% (about 160 mm) are shown by lines a and b in FIG. 3, respectively. ing. Here, the line a shows a case of 16%, and the line b shows a case of 18%. As a comparative example, the configuration of the substrate 1 was the same as that of the above embodiment, and the position of the support legs 2 was 11% (about 10%) of the vertical or horizontal dimension of the substrate 1.
0 mm) is indicated by line c in FIG. The floor slab 3 is a 150 mm thick concrete slab. In FIG. 3, the a line indicates a line having an L value of 50, the b line indicates a line having an L value of 55, and the c line indicates an L value.
A line with a value of 60 is shown. Here, the L value is JIS
A1419 is a sound insulation class equivalent to A1419, and shows lightweight floor impact sound and sound insulation performance. Then, as shown in FIG.
In the case where the support leg 2 is disposed inside the side end of the base material 1 in the length range L of%, it can be seen that a high soundproofing performance with an L value of 50 can be secured.

The above-mentioned operation and effect depend only on the position of the support legs 2 and are not related to the configuration, size and shape of the substrate 1. Therefore, the configuration, size and shape of the substrate 1 are as described above. The present invention is not limited to the embodiment, and other sizes and thicknesses may be used. In addition, if the stability of the floor at the time of construction can be ensured, the arrangement size of the support legs 2 should be equal to the vertical or horizontal dimension of the base material.
It may be 2% or more.

FIG. 4 shows a second embodiment of the present invention.
In this embodiment, the configuration of the base material 1 is the same as that of the above embodiment, and the arrangement size of the support legs 2 is set to 20% (180%).
mm) and 11% (approximately 100 mm) in length. The floor impact sound level in this case is shown by the d line in FIG. In addition, as a comparative example, the arrangement size of the support leg 2 was 11% in length and width.
(About 100 mm) is shown by a line c in FIG. As is clear from FIG. 5, it can be seen that the arrangement size of the support leg 2 is effective even if only one of the vertical and horizontal directions is considered.

Further, the support legs 2 are arranged on the back surface of the base material 1 made of a highly rigid material such as mortar or concrete and the surface material 1c with an arrangement size of 13% to 22% of the vertical or horizontal size of the base material 1. It may be so. With this configuration, a high soundproofing effect equal to or higher than that of the first embodiment can be obtained. FIG. 6 shows a third embodiment of the present invention. In this embodiment, an elastic sheet 5 made of triple-expanded natural rubber is provided between a plywood 1b and a surface material 1c.
In this figure, the base material 1 is configured with the interposition of the base material 1. The floor impact sound level in a light impact when the arrangement size of the support legs 2 provided on the lower surface of the base material 1 is 18% (about 160 mm) of the vertical or horizontal size of the base material 1 is shown by line e in FIG. Shown. As a comparative example, the base material 1 on which the elastic sheet 5 was not provided was used, and the arrangement size of the support legs 2 was set to 11
% (About 100 mm) is shown by the f line in FIG. In this case, the use of the base material 1 provided with the elastic sheet 5 ensures a higher soundproofing performance than that of the above-described embodiment due to a synergistic effect with the arrangement position of the support legs 2.

[0012]

As described above, in the flooring material of the present invention, since the support legs are arranged inside the side edges of the base material within the length range of 13% to 22% of the vertical or horizontal dimension of the base material. The vibration isolation effect of the support leg is improved as compared with the case where the support leg is arranged inside the side end of the substrate within a length range of 12% or less of the vertical or horizontal dimension of the substrate. It is possible to increase the range of bending vibration of the material, and in particular to improve soundproofing against heavy impact, and to improve soundproofing while securing the basic function of the floor.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a bottom view showing an arrangement position of a support leg.

FIG. 3 is an explanatory diagram for explaining a measurement result using the same floor material.

FIG. 4 is a bottom view showing an arrangement position of support legs in another embodiment.

FIG. 5 is an explanatory diagram illustrating measurement results using the same flooring.

FIG. 6 is a sectional view showing still another embodiment.

FIG. 7 is an explanatory diagram illustrating measurement results using the same floor material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Support leg 3 Floor base L Length range

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E04F 15/00 101 E04F 15/024 601 E04F 15/024 602 E04F 15/024 603 E04F 15/024 606

Claims (1)

(57) [Claims] 1. A flooring material which is mounted on a floor base with supporting legs adjustable in height projecting downward from a proper position on a lower surface of the base material, wherein the vertical or horizontal dimension of the base material is provided. The flooring material, wherein the supporting legs are arranged inside the side end of the base material in a length range of 13% to 22% of the floor material.