JPH0715215B2 - Floor structure - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a floor structure used for floor construction of an apartment or the like, and particularly considering sound insulation performance.

BACKGROUND ART AND MEASURES TO BE SOLVED The floor placement structure used in apartment houses, gymnasiums, etc. is designed to support a panel body on a concrete foundation with a plurality of level-adjustable supports (as an example, Kaisho 54
-36032, JP-A-56-97056).

In addition, in order to obtain a vibration-proof effect for these floor structures,
A configuration has been proposed in which a damping material is simply sandwiched between panel bodies. In such a floor structure, it has been found that the damping material improves the damping effect to some extent. However, in order to enhance the vibration damping effect and reduce the light impact sound,
What kind of damping material is used to identify the loss factor of the panel body, and in relation to this, how is the natural frequency of the anti-vibration rubber that supports the panel body on the concrete foundation set? It is at the stage where various experiments are still being conducted.

In consideration of the above facts, the present invention provides a floor-standing structure having a panel body and a support, which is capable of obtaining a sufficient vibration-damping effect against floor impact noise, particularly lightweight floor impact noise. That is the purpose.

[Summary and Action of the Invention] The present invention is a flooring structure in which a panel body is supported on a foundation by a level-adjustable support body, in which a damping material is sandwiched between an upper material and a lower material. The loss factor at 500 Hz is 0.03 or more, and the natural frequency of the vibration-proof rubber interposed between the support and the foundation is set between 15 Hz and 70 Hz.

In this way, the loss factor of the panel body in which the damping material is arranged in the intermediate layer is 0.03 or more at 500 Hz, and the natural frequency of the vibration isolation rubber attached to the support body that supports this panel body is from 15 Hz. By setting it between 70Hz, it is possible to enhance the vibration damping effect and reduce the lightweight floor impact sound.

[Embodiment of the Invention] FIG. 1 shows a floor structure to which the first embodiment of the present invention is applied.

In this embodiment, the panel body 10 is arranged on a concrete foundation 14 with a plurality of supports 12.

As shown in detail in FIG. 2, the support body 12 has a male thread formed on the lower end of a bolt 16 arranged with its axis center vertical, and a flange 18 is screwed into the male thread. An anti-vibration rubber 20 is attached to the lower end surface of the flange 18 for abutting against the foundation 14.

The anti-vibration rubber 20 has a hemispherical shape that is convex toward the foundation 14, but may have another shape such as a cylinder, a prism, or a cylinder as long as it has a similar natural frequency. . The most desirable vibration proof rubber 20 has a composition of 50 to 80 parts of 1.2 polybutadiene with respect to 50 parts of NR.

The upper end of the bolt 16 is fixed to the support plate 22.
The support plate 22 may be screwed with the bolt 16.

The panel body 10 has a structure in which a damping material 28 is sandwiched and superposed between an upper material 24 and a lower material 26.

The upper material 24 and the lower material 26 have a role as restraint materials, and the damping material 28
The loss factor of the panel body 10 is increased by adopting a sun-germany structure. The upper material 24 and the lower material 26 are preferably wood-based panels such as particle boards, inorganic boards such as flexible boards and slates, but most preferably particle boards having a thickness of about 15 mm and 12 mm.

In addition, the damping material 28 includes an inorganic filler 20% with respect to 100 parts by weight of an acrylic or silicone plastic emulsion.
A viscoelastic body composed of -50 parts by weight and 5 parts by weight or less of a thickener is used.

By using such a damping material 28, the panel body 10
Has a loss coefficient of 0.03 or more at 500 Hz, and correspondingly, by setting the natural frequency of the antivibration rubber 20 in the range of 15 Hz to 70 Hz, the vibration damping effect is increased.

In the floor structure according to the present embodiment configured as described above, a plurality of, for example, four support bodies 12 are attached to the panel body 10 having a planar shape of 1 meter square, and the bolts 16 are rotated by rotating the bolts 16.
The level is adjusted while changing the relative height between the flange 16 and the flange 18 and laid on the foundation 14. If necessary, a wood plate material 30 can be attached to the top material 24 as shown in FIG. 2 to form a finish material.

FIG. 3 shows the measurement results of the floor impact sound level with respect to the frequency when this embodiment is applied. In the figure, reference numeral 32 is an example in which the vibration isolating rubber 20 having a natural frequency exceeding 70 Hz is attached. , 34 is an example in which the natural frequency of the vibration-proof rubber is adjusted to about 40 Hz, and reference numeral 36 in the drawing is the vibration-proof rubber 20 of the support body 12 and the vibration-damping material 28 sandwiched between the panel bodies 10 as in the present embodiment. The results are shown in the case of performing optimization (loss coefficient 0.05 at 50 Hz at natural frequency 40 Hz of the anti-vibration rubber 20) in consideration of both, and the measurement results are the results by the tapping machine method of JIS A1418.

In the above embodiment, it is possible to finish the surface of the upper member 24 and omit the wood board 30.

Next, FIG. 4 shows a floor placing structure according to a second embodiment of the present invention.

In this embodiment, the support 12 is arranged at the boundary of the panel bodies 10 to be laid, whereby the support 12 has a structure for supporting the adjacent panel bodies 10 together.

With such an arrangement, the number of supporting bodies 12 with respect to the panel body 10 is reduced, so that the natural frequency of the vibration-proof rubber 20 is slightly reduced as compared with the above-described embodiment.

EFFECTS OF THE INVENTION Since the present invention has the above-described configuration, it is possible to enhance the vibration damping effect and reduce the lightweight floor impact sound.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a first embodiment of a floor placing structure according to the present invention is applied, and FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a diagram of floor impact sound levels with respect to frequencies shown in comparison with a conventional floor structure and this embodiment, and FIG. 4 is a vertical sectional view showing the second embodiment. 10 …… Panel body, 12 …… Supporting body, 14 …… Foundation, 24 …… Upper material, 26 …… Lower material, 28 …… Vibration damping material.

Claims (1)

[Claims] 1. A floor-standing structure in which a panel body is supported on a foundation by a level-adjustable support body, wherein the panel body is constructed by sandwiching a damping material between an upper material and a lower material, and 500 Hz The flooring structure is characterized in that the loss coefficient in 0.02 is 0.03 or more, and the natural frequency of the anti-vibration rubber interposed between the support and the foundation is set between 15 Hz and 70 Hz.