JPH01165871A - Soundproof floor - Google Patents

Abstract

PURPOSE: To reduce pulse sound of a floor by providing a frame made of rubber in close contact with the lower part of a surface layer in the periphery, and putting fine powder with a specified Young's modulus or less in the inside of the frame. CONSTITUTION: A frame 2 made of rubber is provided in close contact with the periphery of the lower part of a surface layer 1 made of wood or the like, fine powder 3 such as silica, mica or the like with a Young's modulus of 4×10<5> N/m or less is filled in the inside of the frame, and an intermediate layer 4 and an elastic layer 5 are stacked on the lower surface to be installed on a building frame 6. Impact force applied to the layer l is elastically absorbed in the fine powder 3 to reduce transmission to the layers 4, 5 and the building frame 6. Accordingly, floor impact sound can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention particularly relates to a soundproof floor that reduces floor impact noise.

(Background Art) Conventionally, carpets have been used for floors in apartment complexes, etc., but wooden floors are being replaced due to the occurrence of dust mites and the difficulty of maintenance. However, with wooden floors, the floor impact noise caused by people walking on the floor or people being thrown by them becomes louder, and there is a tendency for complaints to occur from downstairs.

(Object of the Invention) The present invention has been made in view of the above-mentioned drawbacks, and its object is to reduce floor impact noise in a thin, direct-laid floor.

[Disclosure of the invention]

(Structure) The soundproof floor of the present invention has a frame made of rubber or the like around the four sides of the surface layer so as to be in close contact with the lower part of the surface layer, and has a Young's modulus of 4×10 inside the frame.
It contains fine powder of less than 'N/m.

(Example 1) An example of the present invention will be described using FIG. 1.2. The soundproof floor of this embodiment has a frame 2 made of a polymeric material, rubber, etc., with a width of 4, so as to be in close contact with the lower four circumferences of a surface layer 1 of several thicknesses made of wood, polymeric material, etc. The inside thereof is filled with fine powder 3 of silica, mica, etc. having a Young's modulus of 4×10'N/bo or less, and below it is an intermediate layer 4 of several thicknesses made of a wood material, etc., and a polymer material, rubber, etc. several mm
Thick elastic layers 5 are sequentially installed to make the entire soundproof floor on a frame 6 such as a concrete slab.

The Young's modulus of the fine powder 3 was determined by the method shown in FIG. 3, and one suitable for preventing floor impact noise was selected. The fine powder 3 is vibrated, and the impedance head 15 determines the acceleration of the cylinder 12, while the acceleration of the iron plate 13 placed on the top of the fine powder 3 is determined, and both are input to the FFT analyzer 16 to measure the resonance frequency. , based on this, the spring constant of the fine powder 3 is determined, and the Young's modulus is further calculated.

As a result, it was found that a Young's modulus of the fine powder 3 of 4×10 5 N/m 2 or less is suitable for preventing floor impact noise.

In this example, since the fine powder 3 is placed directly under the surface layer 1, the fine powder 3 immediately elastically absorbs the impact force applied to the surface layer 1, and propagates to the intermediate layer 4, the elastic layer 5, and finally the frame 6. can be made smaller.

In this example, the surface layer l is made of 3ma+thick wood plywood,
Frame 2 is made of styrene-butadiene rubber with a width of 10 m and a thickness of 2 m.
Figure 4 shows the vibration damping amount when the fine powder 3 is dry silica with a Young's modulus of 1.1xlO'N/I, the intermediate layer 4 is a 9-thick plywood, and the elastic layer 5 is foamed natural rubber with a thickness of 8 am. Indicated by

The curve in FIG. 4 shows the amount of vibration damping when styrene-butadiene rubber of the same thickness is used instead of the layer of fine powder 3.

As shown in FIG. 4, the fine powder 3 has a vibration damping effect between 100 and 600 Hz, which is important for preventing floor impact noise.

(Example 2) As shown in FIG.
is installed directly on the frame 6.

In this embodiment as well, the fine powder 3 provides the effect of elastically absorbing impact force.

〔Effect of the invention〕

In the soundproof floor of the present invention, as described above, a frame made of rubber or the like is provided so as to be in close contact with the lower four circumferences of the surface layer, and a fine powder having a Young's modulus of 4×10'N/n (below) is placed inside the frame. Floor impact noise can be reduced by elastically absorbing impact force.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of Example 1 of the present invention, Fig. 2 is a perspective view showing a partial cross section of the same as above, Fig. 3 is a system diagram for measuring Young's modulus of fine powder, and Fig. 4 is an implementation of the present invention. FIG. 4 is a comparison diagram of vibration damping amounts in Example 1. FIG. 5 is a sectional view of Example 2 of the present invention. ■ is the surface layer, 2 is the frame, 3 is the fine powder, 4 is the intermediate layer, 5 is the elastic layer, and 6 is the skeleton.

Claims (1)

[Claims] (1) A frame made of rubber or the like is provided on all four sides of the surface layer so as to be in close contact with the lower part of the surface layer, and the Young's modulus is 4 x 10^5 N/m^ inside the frame.
A soundproof floor characterized by containing a fine powder of 2 or less.