JP7144226B2 - Floor sound insulation method - Google Patents

Description

The present invention relates to a floor sound insulation method .

BACKGROUND ART In recent years, in buildings such as houses, sound insulation structures (floor sound insulation structures) have been adopted for floors in order to suppress impact sound from being transmitted downstairs (see Patent Documents 1 and 2, for example).

JP 2013-249606 A JP-A-06-066011

In the floor sound insulation structures described in Patent Documents 1 and 2, a nonwoven fabric or the like is interposed between the underfloor material and the floor finishing material, but the use of the nonwoven fabric softens the floor surface. I had a problem. When the floor surface becomes soft, problems such as a poor feeling of walking on the floor and rattling noise due to rattling of furniture occur.

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to solve the problems described above.

In order to solve the above problems, the floor sound insulation method of the present invention includes:
A non-woven fabric, a floor sound insulation sheet, and a floor finishing material are sequentially laminated on the underfloor material,
For the floor sound insulation sheet, a hard foam having spindle -shaped cells with long axes oriented in the thickness direction is used,
The non-woven fabric is a compressed non-woven fabric that is compressed to a thickness that is almost the same as or more difficult to compress than the floor sound insulation sheet,
In a state in which the compressed nonwoven fabric, the floor sound insulation sheet, and the floor finishing material are sequentially laminated on the underfloor material, a worker rides on the floor finishing material and applies pressure with the weight of the worker. It is characterized by being fixed with a fixture.

According to the present invention, with the above configuration, it is possible to prevent the floor surface from becoming soft even if non-woven fabric is used for the floor having the sound insulation structure .

1 is a longitudinal sectional view of a floor sound insulation structure according to this embodiment; FIG. FIG. 2 is a vertical cross-sectional view showing a state in which a nonwoven fabric is compressed into a compressed nonwoven fabric. (a) is a perspective view showing a construction state in the case of a compressed nonwoven fabric, and (b) is a perspective view showing a construction state in the case of a nonwoven fabric. (a) is a plan view showing a fixed state in the case of a compressed nonwoven fabric, and (b) is a plan view showing a fixed state in the case of a nonwoven fabric. (a) is a longitudinal sectional view showing the internal structure of a nonwoven fabric, and (b) is a longitudinal sectional view showing the internal structure of a compressed nonwoven fabric. 2 is a graph showing the sound insulation performance of the floor sound insulation structure of FIG. 1 (vertical axis: sound pressure level, horizontal axis: 1/1 octave band frequency).

Hereinafter, this embodiment will be described in detail with reference to the drawings.
1 to 6 are for explaining this embodiment.

<Construction> The construction will be described below.
As shown in FIG. 1, a sound insulation structure (floor sound insulation structure) is adopted for a floor 2 of a building 1 such as a house in order to prevent impact sound from being transmitted downstairs. The floor 2 (sound insulation floor) of this floor sound insulation structure is constructed as follows.

(1) A non-woven fabric 6, a floor sound insulation sheet 7, and a floor finishing material 8 are laminated on the underfloor material 5 in this order. Then, the nonwoven fabric 6 is compressed into a compressed nonwoven fabric 9 .

Here, the underfloor material 5 can be, for example, a particle board, plywood, or the like. For the underfloor material 5, for example, a general one having a thickness of 20 mm can be used.

The nonwoven fabric 6 is preferably made of 99% or more polyester (polyester nonwoven fabric). In general, polyester has a moisture content of 0.4% to 0.5% (20°C/65% RH) under standard conditions, and a moisture content of 0.1% to 0.3% (20°C/65% RH) under dry and wet conditions.・20% RH) and 0.6% to 0.7% (20°C, 95% RH), so the material is almost unaffected by water. In general, polyester has a melting point of 110° C. and a softening point of 90° C., so it is a material that is almost unaffected by temperature. The polyester non-woven fabric 6 is therefore suitable for use in the floor 2 .

Any material can be used as the floor sound insulation sheet 7, and for example, a material used as an underfloor spacer can be used. Some floor sound insulation sheets 7 used as underfloor spacers are made of hard foam or the like. It is preferable to use a polyolefin-based resin as the hard foam because it has excellent soundproofing properties, and is also excellent in recyclability and incineration disposal.

Examples of polyolefin resins include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, isotactic or syndiotactic homopolypropylene, block propylene copolymers, random propylene copolymers, and polybutene. , ethylene-propylene copolymers, ethylene-propylene-diene copolymers, ethylene-butene copolymers, ethylene-vinyl acetate copolymers, ethylene-acrylate copolymers, and the like. These may be used alone, or two or more of them may be used in combination.

In addition, the hard foam is a spindle-shaped cell with an average aspect ratio of 1.1 to 4.0 in which the major axis is oriented in the thickness direction by suppressing foaming in the surface direction (in short, cells that are vertically long in the thickness direction). ) is preferred. Thus, by having spindle-shaped cells, the rigid foam has high compressive strength in the thickness direction and can be easily cut with a cutter knife or the like.

The rigid foam preferably has an expansion ratio of 3 to 20 times and a compression modulus of 5 MPa or more. If the expansion ratio is less than 3 times, a sufficient aspect ratio (the ratio of the long axis to the short axis of the cells) may not be obtained, and the desired strength may not be obtained. This is because if it exceeds, the cell wall of each cell becomes thin and sufficient compressive strength may not be exhibited.

Moreover, when the compression modulus is less than 5 MPa, sufficient rigidity as an underfloor spacer may not be obtained. Although the upper limit of the compressive modulus is not particularly recognized, if it exceeds 50 MPa, it becomes brittle and chipping or cracking may easily occur during construction, so care should be taken.

When the average aspect ratio of the spindle-shaped cells is less than 1.1, the cells become almost spherical, and the compression modulus and compressive strength due to the spindle shape cannot be improved, making it difficult to obtain a good walking feeling. If the average value of the aspect ratio exceeds 4.0, the hard foam is likely to break when receiving an impact, and cracks and chips are likely to occur. It is preferable that the average value of the maximum diameter in the plane direction of the cells inherent in the rigid foam is 500 μm or more.

The production method for obtaining a rigid foam is not particularly limited. A preferred method is to shape the resin composition into a sheet-like raw material, and then heat the obtained foamable sheet to a temperature higher than the decomposition temperature of the thermally decomposable chemical foaming agent to cause chemical foaming.

The floor covering material 8 can be a flooring material or the like. For the floor finishing material 8, for example, a general one with a thickness of 6 mm can be used.

The floor finishing material 8, the floor sound insulation sheet 7, and the non-woven fabric 6 are fixed to the underfloor material 5 by fasteners such as staples 11 (FIG. 3). By using these configurations, the floor 2 becomes a lightweight floor or the like. However, the floor 2 is not limited to a lightweight floor. In addition, materials other than those described above can be used for the underfloor material 5, the nonwoven fabric 6, the floor sound insulation sheet 7, and the floor finishing material 8. Furthermore, sound insulating materials other than those described above may be appropriately interposed in the floor sound insulating structure.

The compressed nonwoven fabric 9 is literally the nonwoven fabric 6 compressed. The compressed nonwoven fabric 9 will be described later.

(2) As shown in FIG. 2, the compressed nonwoven fabric 9 is preferably made by compressing the thickness of the nonwoven fabric 6 to 1/2 to 1/5.

Here, the reason why the compressed nonwoven fabric 9 is compressed to a thickness smaller than 1/2 of the thickness of the nonwoven fabric 6 is that if the nonwoven fabric 6 is only lightly compressed to the extent that the thickness is not reduced to 1/2, the nonwoven fabric 6 is still fluffy and can be walked on. This is due to the fact that a bad feeling remains. Compressing the thickness of the nonwoven fabric 6 to a thickness of 1/2 to 1/5 to make the compressed nonwoven fabric 9 eliminates the fluffy feeling described above, and makes the compressed nonwoven fabric 9 more difficult to compress than the floor sound insulation sheet 7. It is for making things. The compressed nonwoven fabric 9 is most preferably compressed to a thickness of 1/4 or less of the thickness of the nonwoven fabric 6 . As a result, the compressed nonwoven fabric 9 can be made almost as compressible as the floor sound insulating sheet 7 or less compressible. The upper limit of the compression of the nonwoven fabric 6 is a physical limit or a manufacturing limit, but the practical upper limit of the compression of the nonwoven fabric 6 is about 1/5.

(3) As the compressed nonwoven fabric 9, it is preferable to use a nonwoven fabric 6 having a thickness of 2 mm which is compressed to a thickness of 0.5 mm.

Here, the nonwoven fabric 6 with a thickness of 2 mm has a weight per unit area of 50 g/m ² and is used, for example, as a spring receiving material for trains (durability: 20 years or more), a drainage filter device (can be used semi-permanently), and the like. It is preferable to use This nonwoven fabric 6 is used to form a compressed nonwoven fabric 9 . The compression method is not particularly limited. The existing nonwoven fabric used as a base material for carpets and the like has a thickness of 8 mm and a basis weight of 200 g/m ² , which is different from the nonwoven fabric 6 used for the compressed nonwoven fabric 9 of this embodiment. ing.

(4) As shown in FIG. 3(a), at least the compressed nonwoven fabric 9 is preferably fixed to the underfloor material 5 in a pressurized state.

Here, at least the compressed nonwoven fabric 9 is fixed to the underfloor material 5 in a pressurized state because the adhesion between the underfloor material 5 and the compressed nonwoven fabric 9 (especially around the fixing point) is increased and the compressed nonwoven fabric This is for further compressing 9 and further improving the sound insulation effect.

As shown in FIG. 3(a), the compressed nonwoven fabric 9 can be easily and reliably pressed from above by applying it while the worker puts his or her weight on it. In this case, the pressure applied to the compressed nonwoven fabric 9 is about the weight of the worker (for example, for adult men, the pressure is about 50 kg to 80 kg, and for adult women, the pressure is about 40 kg to 60 kg). becomes. However, since the weight of the worker varies from person to person, the pressure applied to the compressed nonwoven fabric 9 is not limited to the above. Moreover, the pressure applied to the compressed nonwoven fabric 9 is not limited to the weight of the worker, and a weight or the like can be used as appropriate, or the weight of the worker and the weight can be used together.

Specifically, the compressed nonwoven fabric 9, the floor sound insulation sheet 7, and the floor finishing material 8 are laminated in this order on the underfloor material 5, and the worker climbs on the floor finishing material 8 to lay the floor finishing material. The position of the edge of 8 is used as a fixing point, and the fixing point is sandwiched between the legs, and a fixture such as a staple 11 is fixed between the legs.

On the other hand, in the conventional case where the nonwoven fabric 6 instead of the compressed nonwoven fabric 9 is applied, as shown in FIG. Therefore, the fixing method is completely different from that of this embodiment.

(5) As shown in FIG. 4(a), at least the compressed nonwoven fabric 9 is preferably fixed to the underfloor material 5 at narrow pitches 13 and 14. As shown in FIG.

Here, at least the compressed nonwoven fabric 9 is fixed to the subfloor material 5 at the narrow pitches 13 and 14 because the compressed nonwoven fabric 9 is partially compressed at the fixing points, so that it is partially compressed at the adjacent fixing points. This is to form the next fixed point within the range affected (or the above-described influence of the applied pressure). Specifically, the worker, while standing on the floor finishing material 8, slightly moves laterally along the edge of the floor finishing material 8, and moves the narrow space between the floor finishing materials 8 as shown in FIG. to form a large number of fixed points. The pitch 13, 14 between the fixed points at this time is approximately 10 mm to 20 mm, preferably approximately 15 mm. In addition, after fixing the compressed nonwoven fabric 9 to the underfloor material 5 as described above, the floor sound insulation sheet 7 and the floor finishing material 8 can be constructed later.

On the other hand, in the conventional case where the nonwoven fabric 6 instead of the compressed nonwoven fabric 9 is applied, as shown in FIG. Since the pitches 15, 16, etc., are wide, the fixing method is completely different from that of this embodiment.

(6) Adopt the floor sound insulation structure described above for the building 1 .

Here, the building 1 can be, for example, a detached house or a collective housing such as an apartment or condominium. However, the building 1 to which the floor sound insulation structure can be applied is not limited to the above.

<Action and Effect> According to this embodiment, the following effects can be obtained.

(Effect 1) Impulsive sound applied to the floor finishing material 8 is insulated by the floor sound insulation sheet 7, and is suppressed from being transmitted to the lower floor. By placing the compressed nonwoven fabric 9 under the floor sound insulation sheet 7 , the sound insulation effect of the floor sound insulation sheet 7 can be further improved by the compressed nonwoven fabric 9 .

At this time, since the compressed nonwoven fabric 9 is obtained by compressing the nonwoven fabric 6, it is possible to prevent the surface of the floor 2 from becoming soft. Therefore, it is possible to prevent the deterioration of walking feeling due to softening of the surface of the floor 2 as in the case where the nonwoven fabric 6 is used as it is without being compressed. In addition, the softening of the surface of the floor 2 can eliminate the problem of the rattling of the furniture and the rattling noise. Therefore, by processing the nonwoven fabric 6, which has been a material difficult to use for the floor 2, into the compressed nonwoven fabric 9 and using it, it can be used well for the floor 2. - 特許庁

Moreover, by compressing the nonwoven fabric 6 as shown in FIG. 5(a) into a compressed nonwoven fabric 9 as shown in FIG. Since the number of air layers is increased, the sound absorption is higher than that of the uncompressed nonwoven fabric 6. - 特許庁Therefore, the sound insulation effect of the floor 2 can be improved by using the compressed nonwoven fabric 9 (compared to using the uncompressed nonwoven fabric 6).

(Function and Effect 2) The compressed nonwoven fabric 9 is preferably made by compressing the thickness of the nonwoven fabric 6 to 1/2 to 1/5. In this way, by compressing the thickness of the nonwoven fabric 6 to 1/2 to 1/5 to form the compressed nonwoven fabric 9, the compressed nonwoven fabric 9 eliminates or suppresses the fluffy feeling that causes poor walking feeling. Also, the compressed nonwoven fabric 9 is almost as hard to be compressed as the floor sound insulation sheet 7 or less. Therefore, even if a load acts on the surface of the floor 2, the compressed nonwoven fabric 9 is hardly compressed, so that the floor 2 can be minimized.

(Effect 3) As the compressed nonwoven fabric 9, it is preferable to use a nonwoven fabric 6 having a thickness of 2 mm which is compressed to a thickness of 0.5 mm. As a result, even when a load (for example, 400 kg/m ² ) acts on the surface of the floor 2, the compressed nonwoven fabric 9 is only compressed to a thickness of 0.4 mm, so that the sinking of the floor 2 can be minimized. can be done. Also, the compressed nonwoven fabric 9 obtained by compressing the 2mm thick nonwoven fabric 6 to 0.5mm thickness is very thin and is less likely to be compressed than the floor sound insulation sheet 7. Or, even if it is constructed with wrinkles, the dimensional error with respect to the total finished thickness of the floor 2 (for example, within the prescribed total thickness of 13 mm) can be suppressed to 0.3 mm or less. Therefore, construction becomes easy. On the other hand, some commercially available soundproof floor materials sink 3.5 mm to 5.5 mm into the specified total thickness of 13 mm to 15 mm. Therefore, by using the compressed nonwoven fabric 9 compressed to a thickness of 0.5 mm as in this embodiment, the effect of preventing sinking is 10 times greater than that of the commercially available soundproof floor material, which is advantageous in terms of construction.

FIG. 6 is a graph showing the effects of the floor sound insulation structure using the compressed nonwoven fabric 9 of this example. This graph summarizes the results of octave band analysis (constant ratio width analysis) for noise analysis. ). An octave band is a frequency band divided by a frequency filter having a width of a constant ratio with 1 kHz as a reference. Octaves are harmonics, and 1/1 octave band analysis yields 125 Hz, 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz. According to this graph, compared to the case without the compressed nonwoven fabric 9 (line a), this example using the compressed nonwoven fabric 9 (line b) has an improved sound insulation effect at each frequency. It was confirmed (improvement effect of 2.0 dB at 125 Hz, 5.1 dB at 250 Hz, 10.8 dB at 500 Hz, 9.8 dB at 1000 Hz, and 7.1 dB at 2000 Hz). The floor of line a has a floor sound insulation structure in which a floor sound insulation sheet 7 with a thickness of 5.5 mm is placed under the floor finishing material 8 with a thickness of 6 mm. 2 has a floor sound insulation structure in which a floor sound insulation sheet 7 with a thickness of 5.5 mm and a compressed nonwoven fabric 9 compressed to a thickness of 0.5 mm are laminated under a floor finishing material 8 with a thickness of 6 mm.

(Effect 4) At least the compressed nonwoven fabric 9 is preferably fixed to the underfloor material 5 in a pressurized state. As a result, the adhesion between the underfloor material 5 and the compressed nonwoven fabric 9 (especially around the fixed points) is increased, and further compression of the compressed nonwoven fabric 9 itself can be expected, so that the sound insulation effect can be further improved. can. At this time, the underfloor material 5, the compressed nonwoven fabric 9, the floor sound insulation sheet 7, and the floor finishing material 8 are simultaneously fixed in a pressurized state so that the underfloor material 5, the compressed nonwoven fabric 9, and the floor sound insulation The adhesion between the sheet 7 and the floor finishing material 8 is increased, and the sound insulation effect can be further improved.

(Effect 5) At least the compressed nonwoven fabric 9 is preferably fixed to the underfloor material 5 at narrow pitches 13, 14 (approximately 10 mm to 20 mm). As a result, the number of fixing points increases, and the next fixing point can be formed within the range affected by the partial compression (or the above-described pressure force) at the adjacent fixing point. , the adhesion between the underfloor material 5 and the compressed nonwoven fabric 9 (especially around the fixed points) is further enhanced, and the compressed nonwoven fabric 9 itself can be expected to be further compressed, so that the sound insulation effect can be further improved. . At this time, by fixing the underfloor material 5, the compressed nonwoven fabric 9, the floor sound insulation sheet 7, and the floor finishing material 8 at narrow pitches 13 and 14 at the same time, the underfloor material 5, the compressed nonwoven fabric 9, and the floor The adhesion between the sound insulation sheet 7 and the floor finishing material 8 is further enhanced, and the sound insulation effect can be further improved.

(Effect 6) According to the building 1 of this embodiment, by adopting the floor sound insulation structure, it is possible to obtain effects similar to those described above.

REFERENCE SIGNS LIST 1 building 2 floor 5 underfloor material 6 nonwoven fabric 7 floor sound insulation sheet 8 floor finishing material 9 compressed nonwoven fabric

Claims (3)

A non-woven fabric, a floor sound insulation sheet, and a floor finishing material are sequentially laminated on the underfloor material,
For the floor sound insulation sheet, a hard foam having spindle -shaped cells with long axes oriented in the thickness direction is used,
The non-woven fabric is a compressed non-woven fabric that is compressed to a thickness that is almost the same as or more difficult to compress than the floor sound insulation sheet,
In a state in which the compressed nonwoven fabric, the floor sound insulation sheet, and the floor finishing material are sequentially laminated on the underfloor material, a worker rides on the floor finishing material and applies pressure with the weight of the worker. A floor sound insulation method characterized by fixing with fixtures. In the floor sound insulation method according to claim 1,
A floor sound insulation method, wherein at least the pressure applied to the compressed nonwoven fabric is adjusted by using a weight in combination with the weight of the worker when fixing. In the floor sound insulation method according to claim 1 or claim 2,
A floor sound insulation method, wherein at least the compressed nonwoven fabric is fixed to the underfloor material at a pitch of 10 mm to 20 mm within a range affected by partial compression at adjacent fixing points.

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