JPH01318656A - Soundproof floor structure and underfloor shock absorbing material - Google Patents

Abstract

PURPOSE:To obtain a floor structure capable of absorbing impulsive sound produced at the floor surface by arranging a load dispersing board, made from porous board, over a floor ground through sound-absorptive, shock absorbing material, and by laying thereupon a floor supporting members such as a joist, floor-finishing material and the like through an elastic body. CONSTITUTION:A sound-absorptive, shock absorbing member 2, made of glass wool, foamed synthetic resin or the like is laid over a floor ground 1 made from concrete floor slab or the like, and a load dispersing board 3 made from porous materials like plywood or hardboard is laid thereupon. An elastic body 4 made from rubber mat or the like is arranged thereupon, and a floor joist 5 and a floor finishing member 6 are further laid thereupon. With such structure, an escape is secured for the air inside the shock absorbing member 2, and the sound of footsteps on the floor surface is absorbed by the sound-absorptive, shock absorbing member 2 through the load dispersing board 3. Impulsive sound produced at the floor surface can be absorbed and muffled thereby.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for disposing a cushioning material such as a glass wool mat on the entire or partial surface of a floor substrate made of a concrete floor slab, etc. The present invention relates to a dry floating floor structure in which the floor is finished with a joist alone or through a joist and a floor joist, and particularly relates to a soundproof floor structure and underfloor cushioning material that aims to reduce floor impact force and impact noise.

(Prior art) The floating floor structure described above is used to reduce the impact force of the floor transmitted to the subfloor via the joists, and to make it difficult for impact noises and walking noises from upstairs rooms to be transmitted downstairs. However, if an impact force acts directly above the joist, the joist will bend, compressing the cushioning material and causing a local thickness reduction.

Therefore, in the conventional dry floating floor structure, as shown in Fig. 9, a load distribution plate made of plywood or the like having a larger area than the bottom surface of the joist a is interposed between the joist a and the cushioning material C. This load dispersion plate disperses the load and impact force, thereby preventing local thickness reduction of the cushioning material C.

(Problem to be solved by the invention) However, when the load distribution plate is interposed in this way, the sinking of the floor surface becomes smaller and the floor surface becomes stable. The air in the cushioning material C is trapped between the slabs d. For this reason, when the cushioning material C is compressed, the air inside the cushioning material C has nowhere to escape, causing the cushioning material C to generate an elastic force due to air pressure in addition to the normal elastic force. In other words, there is a problem in that the repulsive force of the cushioning material C increases, and when an impact force is applied, the cushioning material C does not compress and deform smoothly, and transmits almost the impact force of the floor as it is.

In addition, this load dispersion plate covers the top surface of the cushioning material C and causes the sound of flapping slippers on the floor to be reflected, reducing the ability of the cushioning material C to absorb lightweight floor impact sounds. There was also.

(Object of the Invention) In view of the above, the present invention is capable of absorbing impact force generated on the floor surface and ensuring sound absorption power while maintaining the stability of the floor surface obtained by arranging the load dispersion plate. The purpose of the present invention is to provide a soundproof floor structure and underfloor cushioning material.

(Means for Solving the Problem) In view of the above, the inventions of claims (1) and (a) ensure that when an impact force is transmitted to the cushioning material, an escape place for the air inside the cushioning material, and also The impact sound, walking sound, etc. pass through the load distribution plate and reach the sound-absorbing cushioning material.

Specifically, the solution taken by the invention of claim (1) is to create a soundproof floor structure consisting of a perforated plate on a subfloor made of a concrete floor slab or the like, with a sound-absorbing cushioning material made of a glass wool mat or the like interposed therebetween. A load distribution plate is arranged, a floor support material such as a joist is placed directly or via an elastic body on the load distribution plate, and a floor finish is applied on the floor support material. .

In addition, the solution taken by the invention of claim (2) is that the under-floor cushioning material is replaced by a load distribution plate made of a perforated plate on the upper surface of the sound-absorbing cushioning material arranged on the sub-floor surface made of a concrete floor slab or the like. are integrally laminated and have a joist mounting portion formed by integrally fixing an elastic body to the upper surface of the load dispersion plate.

(Function) With the configurations of claims (1) and (2), the impact force generated on the floor is transmitted to the load distribution plate through the joists, and the cushioning material is compressed between the load distribution plate and the subfloor. In this case, the air inside the cushioning material escapes upward through the holes in the load dispersion plate, preventing the instantaneous rise in air pressure in the cushioning material, causing the cushioning material to smoothly compress and deform, restoring its original cushioning properties. In addition, impact noise, walking noise, etc. generated on the floor are transmitted to the cushioning material through the holes in the load distribution plate and absorbed.

(Example) Embodiments of the present invention will be described below based on the drawings.

Figures 1 and 2 show a soundproof floor structure according to the invention of claim (1), in which a sound-absorbing cushioning material 2 is laid entirely or partially on a floor base 1, which is a concrete floor slab. There is. As the cushioning material 2, a fibrous mat such as a glass wool mat, a rock wool mat, a synthetic fiber mat, or a mat made of open-cell foamed synthetic resin is used. Specifically, a glass wool mat with a density of 64 kg/m3 and a thickness of 64 kg/m3 is used. A material having a diameter of 25 to 50IllIIl is preferable because it is excellent in terms of vibration absorption and sound absorption of the floor surface.

A load distribution plate 3 made of a perforated plate having approximately the same dimensions as the cushioning material 2 is arranged on the cushioning material 2, and this load distribution plate 3 is made of plywood, hardboard, plywood resin board, etc.
Specifically, plywood with a thickness of 2.5 to 5.0III11 is preferable because it can evenly distribute the load and produce appropriate flexure to soften the feeling of walking. The range in which the load dispersion plate 3 is placed is 2 times the width of the lower surface of the joist, which will be described later.
It is preferable to make the width twice or more in order to stabilize the floor surface, and in the length direction, it may span the entire length of the lower surface of the joist 5, or it may be provided at appropriate intervals. In addition, as for the holes provided in this load dispersion plate 3, it is preferable to arrange the through holes 31 with a diameter of 5 to 20+u with an opening ratio of 5 to 40%. Specifically, the through holes with a diameter of 15 m− are arranged uniformly at a pitch of 301111. It is preferable to provide an aperture ratio of 19.6%, since sound absorption and air circulation in the through holes 31 can be performed smoothly while maintaining the strength of the load dispersion plate 3.

Although not essential, it is preferable to arrange an elastic body 4 on the load dispersion plate 3, and as this elastic body 4, synthetic fiber felt, rubber mat, foam sheet, etc. are used as appropriate.
Specifically, the thickness is 5-3Of1m.

Synthetic fiber felt with a specific gravity of 0.02 to 0.1 has breathability, so it does not obstruct air flow in the through holes 31 and prevents friction and collision with floor support materials such as joists. It is preferable because it can prevent noise.

When the elastic body 4 is non-permeable, it is provided with a size that is 1/2 or less of the load distribution plate 3 so as not to obstruct air outflow from the through holes 31 of the load distribution plate.

A joist 5, which is a floor support material, is placed on the load dispersion plate 3 or, if an elastic body 4 is arranged, on this elastic body 4, and a floor finishing material is placed on the joist. 6 has been installed. The material and dimensions of the joist 5 and floor finishing material 6 are not particularly important, but the joist 5 has a thickness of 20II, 111, and a width of 5.
0mm, floor finishing material 6 has a thickness of 1 for waste pasting.
A suitable floor material 62 such as 2 mm plywood or particle board 61 and a wooden floor or carpet is applied (see FIG. 5).

Note that among the floor finishing materials 6, the plywood 61 for pasting and the like may be omitted depending on the floor material.

FIG. 3 shows an underfloor cushioning material A according to the invention of claim (2), which is made of the same material and thickness as the above-mentioned sound-absorbing cushioning material 2 and cut into rectangular shapes. A load distribution plate 3A, also made of the same material and thickness as the load distribution plate 3 described above and having the same through holes 31, is laminated and integrated on top of the load distribution plate 3A.

A short-term joist placement portion 8A is provided at the upper surface of the load dispersion plate 3A in the width direction, and this joist placement portion 8A is made of an elastic body made of the same material and thickness as the elastic body 4 described above. 4A is integrally fixed onto the load distribution plate 3A.

FIG. 4 shows a modified example of the underfloor cushioning material A. Unlike the above embodiment, the through holes 31 of the load dispersion plate 3A are provided in the form of slits to facilitate sound absorption and air circulation through the through holes 31. , the joist placement part 8A is unevenly distributed on one side of the upper surface of the load dispersion plate 3A in the width direction, and the two subfloor cushioning materials A are placed 18 with the joist placement part 8A inside.
When rotated by 0' and overlapped, both joist placement parts 8A overlap without colliding with each other, making packaging and handling easier.

FIG. 5 shows the floor finishing material 6 in the soundproof floor structure of claim (1) or the floor finishing material applied on the cushioning material A for the floor base placed on the floor base 1 which is a concrete floor slab. 6 shows a state in which an impact force P is applied to the upper surface of the device. The impact force P is transmitted to the load distribution plate 3 (3A) via the joist 5, and the cushioning material 2 (2A-) is compressed between the load distribution plate 3 (3A) and the subfloor 1. The air inside (2A) escapes upward through the through hole 31 of the load distribution plate 3 (3A).

If the elastic body 4 (4A) has air permeability, the air escaping upward will pass through the inside and surroundings of the elastic body 4 (4A), where the elastic body 4 (4A) does not have air permeability. In this case, the buffer material 2 will escape upward through the surrounding areas.
The reaction force due to the compression of the air contained inside the cushioning material 2 (2A) is eliminated, and the elastic force originally possessed by the cushioning material 2 (2A) is maintained.

Furthermore, impact noise or pedestrians generated on the floor finishing material 6 passes through the through holes 31 of the load dispersion plate 3 (3A) and is absorbed by the sound absorbing buffer material 2 (2A).

In the soundproof floor structure of claim (1), interposing the elastic body 4 between the load dispersion plate 3 and the joist 5 or using the underfloor cushioning material A of claim (2) provides the following advantages. . That is, no impact noise or squeak noise due to friction occurs between the load dispersion plate 3 and the joists 5, and the weight impact force generated on the floor is absorbed by the elastic body 4, and the elastic body 4 (4A
) Since cables and pipes can be placed on the sides of the joist 5 by utilizing the space equal to the thickness of the elastic body, wiring and piping can be run vertically and horizontally below the joists 5.

When performing wiring or piping, it is desirable that the thickness of the elastic body 4 (4A) is 20II11 or more.

FIG. 6 shows a usage state in which a large number of under-floor cushioning materials A according to claim (a) are arranged side by side on the floor base 1. In this way, just by arranging the under-floor cushioning materials A side-by-side, the load dispersion plate 3A and the elastic body 4A are arranged side by side. can be placed on top of the unstable cushioning material 2A, which eliminates the need to place them on top of the unstable cushioning material 2A.
There will be no harm to the.

Specific examples and test results of the inventions of claims (1) and (21) are shown below.

Specific example: Concrete 12-t floor slab: 150ml thick 11 Cushioning material,
Glass wool mat load distribution plate with density 64kg/cm3 and thickness 25III11: Through holes with diameter 1511I11 are 3On+m
Plywood elastic body with a thickness of 2.5au++ provided at pitches:
Synthetic resin felt joists with a thickness of 51011: 18 m thick
Comparative Example 1: Wooden floor finishing material with a thickness of 12III and a floor material with a thickness of 2. Comparative Example 2: Same as Example 1 for 5mm plywood concrete floor slab, cushioning material, elastic body, joist, and floor finishing material: Thickness without cushioning material, load distribution plate, elastic body, joist, and floor finishing material. 150a+m concrete floor slab Figure 7 shows the floor impact sound level for light floor impact sound, and Figure 8 shows the floor impact sound level for heavy floor impact sound at 4-1 based on the regulations of JIS 1418.
(7) In both cases of light floor impact sound and heavy floor impact sound, the specific example 1 is compared to the comparative example 1.
It was confirmed that the floor impact sound level was reduced compared to the original model, and that the improvement effect on lightweight floor impact noise was particularly large. This is because the light floor impact sound is absorbed in the underfloor space through the through hole 31, and the heavy floor impact sound is absorbed by the air outflow from the through hole 31, which eliminates the increase in air pressure in the cushioning material. It is presumed that this is because the compressive deformation of .

(Effect of the invention) As explained above, according to the soundproof floor structure as claimed in claim (1) or the underfloor cushioning material as claimed in claim (2), the stability of the floor surface is improved by the load distribution plate. In addition, since the cushioning material maintains its original elasticity, it can absorb the impact force generated on the floor. Sound absorption is also ensured because the sound is transmitted to the material and absorbed.

In addition, when the floor support material is placed on the load distribution plate via an elastic body in the soundproof floor structure of claim (1), or when the underfloor cushioning material of claim (2) is used, the load distribution No impact sound or squeak is generated between the board and the floor support material, the weight impact force generated on the floor surface can be absorbed, and wiring and piping can be installed below the floor support material.

Furthermore, according to the underfloor cushioning material of claim (2), a buffer layer equipped with a placing part on which floor joists are placed is formed simply by arranging them on the subfloor surface, so that foundation construction can be carried out efficiently, and even after arranging them, Since the upper surface of the cushioning material is protected by the load dispersion plate, there is no possibility of damaging the surface of the cushioning material.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the soundproof floor structure according to the invention of claim (1), FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1,
FIG. 3 is a perspective view of an embodiment of the underfloor cushioning material according to claim (a), FIG. 4 is a perspective view of a modified example of the underfloor cushioning material, and FIG. 5 is a perspective view of the soundproof floor structure and the above. FIG. 6 is a cross-sectional view showing the effect of the under-floor cushioning material, FIG. 6 is a perspective view showing the usage state of the under-floor cushioning material, and FIGS. 7 and 8 are graphs showing the measurement results of the floor impact sound level, Fig. 7 shows the case of lightweight floor impact sound, Fig. 8 shows the case of heavy floor impact sound, and Fig. 9 is a cross-sectional view of a conventional floating floor structure.・・Buffer material, 3,3A・・
・Load dispersion plate, 4.4A...elastic body, 5...joist,
6... Floor finishing material, 8A... Joist placement part, 31...
・Through hole, A...Cushioning material for under the floor. Patent applicant: Daiken Kogyo Co., Ltd. ,−,,−−−−−−j

Claims (2)

[Claims] (1) A load dispersion plate made of a perforated plate is arranged on the subfloor made of a concrete floor slab etc. through a sound absorbing material such as a glass wool mat, and a floor supporting material such as a joist is placed on the load dispersion plate. is placed directly or via an elastic body, and a floor finish is applied to the floor support material. (2) An underfloor cushioning material placed on a subfloor made of a concrete floor slab or the like, which has a load dispersion plate made of a perforated plate laminated and integrated on the top surface of the sound-absorbing cushioning material, and An underfloor cushioning material that has a joist placement part made by integrally fixing an elastic body to the upper surface of a load dispersion plate.