JP3433203B2 - Impact sound attenuating floor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact sound attenuating floor which has a soundproof effect and is suitable for insulating impact sounds such as impact sounds.

[0002]

2. Description of the Related Art Conventionally known floors capable of attenuating floor sounds are made of sufficiently thick glass wool and other fiber materials,
Inorganic foam material or foamed synthetic resin material such as polyolefin, plywood, particle board, concrete panel, etc., and vinyl chloride damping sheet are laminated if necessary, but when laying or placing directly Since the former layer of foam material or the like sinks over time and causes distortion on the floor surface, wooden or metal joists are used to support the floor material in order to eliminate this sinking.

[0003]

However, since the support by joists directly propagates the sound, especially the impact sound, from the floor base to the lower part (lower floor) through the wide joint surface of the joists, the original purpose of the soundproofing is to achieve. It is a solution idea that does not conform to the above and is not preferable in this respect. In order to eliminate this drawback, there is also the idea of sandwiching foam material on either the upper or lower surface of the joist, but this is to add the cause of subduction to the joist to prevent subduction. Therefore, it was difficult to obtain a preferable solution.

In view of the above circumstances, the present invention exerts a remarkable effect in improving soundproofing by reducing the body vibration of the sound, especially the impact sound, while reducing the body vibration, and the impact which is not likely to be deformed such as sinking. In order to develop a sound damping floor, it has a floor structure with an air layer and an original floor support structure.

In order to solve the above problems, the present invention mixes calcium carbonate, carbon and other inorganic materials at appropriate intervals below the sheet or film or plate-like support layer.
Made of mixed rubber that has a protruding tip
The protrusion formed as a smaller contact surface is firmly attached .
The base surface has a diameter of 20 mm and the protrusion is 10-4 per 1 m ² .
The protrusions are arranged so as to support the floor with the area of 0 pieces.
And the plane that can be formed by the tip of the protrusion (virtual plane)
The impact sound damping floor is characterized by having a flooring material having an air layer formed therein.

Further, according to the present invention, at least a foam layer is laminated on the lower side of the sheet or film or the plate-like support layer, and a plurality of small cutout holes are formed at appropriate intervals in the foamed layer. Calcium carbonate, carbon
Made of mixed rubber mixed with other inorganic materials, the protruding tip is fixed
Formed as a smaller contact surface than the base surface
A protrusion having a tip portion protruding below the foam layer is fixed to the support layer , and the base surface has a diameter of 20 mm and a protrusion of 1 m.
Support the floor with an area of 10 to 40 per ²
The impact sound damping floor is also characterized by having a floor member having a structure in which a protrusion is provided in the plane and an air layer is formed in a plane that can be formed by the tip of the protrusion below the foam layer. Is.

The above foam layer can be formed as a closed cell foam layer, but can also be formed as an open cell foam layer, and is also formed as a laminated structure in which a closed cell foam layer and a closed cell foam layer are laminated. You can also do it.

Further, according to the present invention, at least a buffer layer such as non-woven fabric or glass wool is laminated under the sheet or film or the plate-like support layer, and a plurality of small cutout holes are formed at appropriate intervals in the buffer layer. Calcium carbonate, carbon and other inorganic materials are mixed in these small cutout holes.
It is made of mixed rubber and has a protruding tip
It is formed as a smaller contact surface, and its tip is below the buffer layer.
Projections formed to protrude toward is fixed to the support layer, or
The base surface has a diameter of 20 mm and the protrusion is 10-4 per 1 m ² .
The protrusions are arranged so as to support the floor with the area of 0 pieces.
The impact sound damping floor is also characterized by having a floor material in which an air layer is formed in a plane that can be formed by the tip of the protrusion below the buffer layer.

In each of the above constructions, the base surface has a diameter of 20 m.
Floor with an area of 10 to 40 m- prongs per m ²
It is preferable that the protrusion is arranged so as to support the surface.

Vibrations are absorbed by the above-mentioned poles and the propagation of sound is attenuated, and at the same time, the sound of the air layer interposed in the horizontal direction,
Especially, the impact sound is diffused and the sound insulation effect is exhibited together with the sound insulation effect by the air layer. Due to the presence of the foam layer, vibration absorption can be performed more effectively. If a cushioning layer such as non-woven fabric or glass wool is formed instead of the foamed layer, the absorbing action of vibration can be performed by this.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, the floor material 1 which is the main component of the impact sound damping floor according to the present invention is a plywood or a vinyl chloride sheet or other synthetic resin sheet, rubber sheet, non-woven sheet, fiber sheet, paper sheet. Alternatively, it has a supporting layer 2 made of a foamed sheet having a thickness of about 1 mm or less, a film of each material, or any other material or laminated material, which does not cause practically inconvenient sinking on the floor surface. ,
A closed cell foam layer 3 of vinyl chloride, urethane or the like is adhered and laminated on the lower surface thereof, and a plurality of small cutout holes 4 are formed in the foamed layer 3 at predetermined intervals in advance.
An inorganic material such as rubber, synthetic rubber, calcium carbonate, carbon or the like, which has a flat base surface 6 having a substantially full size therein and is formed in a shape higher than the thickness of the foam layer 3 Virtually formed by inserting the protrusion 5 mainly composed of rubber or synthetic rubber such as mixed rubber mixed with the like, fixing the base surface 6 to the support layer 2 by adhesion, and connecting the tip end portions of the protrusion 5 group. An air layer 7 is formed between the flat surface 8 and the foam layer 3.

If the supporting layer 2 is a plywood or the like, it is convenient for fixing by nailing or the like, but even if it is a sheet, the floor material 1 can maintain the bonded state and the flooring can be laminated and fixed for practical use. obtain.

The foam layer 3 has a thickness of about 3 mm or more, preferably about 5 mm or more, and the interval between the protrusion 5 and the height of the protrusion from the foam layer 3, that is, the interval of the air layer 7 is set. The floor material 1 is set to have a thickness of about 3 mm or more, preferably about 5 mm or more, and the total thickness of the floor material 1 is a flooring or the like laid on the floor material 1 from a base surface 9 (which can be the same surface as the virtual plane 8) to be installed. The thickness up to the surface of the finishing material 10 can be set so as to be accommodated in a desired floor position. A polypropylene film or other protective sheet or film may be mounted on at least one of the upper and lower surfaces of the foam layer 3.

The protrusion 5 has a vibration absorbing property and a compressive strength capable of supporting an appropriate load by a plurality of the protrusions 5 arranged at predetermined intervals (thus having little bending). ), For example, JIS hardness (JIS K 63
01) It is formed to have a hardness of about 20 to 60 degrees, preferably about 40 or more.

The illustrated protrusion 5 has a hemispherical flat surface as a base surface 6 and a projection tip (sphere top) as a slightly flat surface. According to this, since it is surface-bonded to the support layer 2 and stable, and is in a bonding state close to the point contact with the base surface 9, it is possible to absorb vibrations, absorb impact noises, and absorb the noises. To prevent the sound from propagating to the base surface 9 and to achieve a sufficient soundproofing effect.

The shape of the stem is half as shown.
It is spherical.

Further, the intervals (number of arranged) of the protrusions 5 can be appropriately set according to the floor application and the required withstand load. For example, if the floor surface having 20 hemispherical protrusions 5 with a diameter of 20 mm and 20 hemispherical protrusions 5 per 1 m ² arranged at even intervals is set to have a load resistance of at least 100 kg, It has sufficient practical strength. It is most suitable that the number of the protrusions 5 is 10 to 40, preferably 20 to 30 per 1 m ² .

The floor material 1 is laid on the base surface 9, and a vibration-damping sheet made of a vinyl chloride resin or a vinyl chloride resin and a non-woven fabric is laminated on the support layer 2, if necessary. The shock-damping floor can be constructed by laminating and adhering the vibration damping sheets (1) and (3) and laminating and fixing the optional flooring 10 thereon.

FIG. 4 shows an embodiment different from the above. In this flooring 1A, the foaming layer 3 in the flooring 1 is a laminate of the closed-cell foaming layer 3 and the open-cell foaming layer 3A. It will be. According to this, the open-cell foam layer 3
The impact bubbles can be further diffused by the bubbles in the AA.

As another embodiment (not shown), the floor material 1
The impact sound can be attenuated by using the continuous cell foam layer instead of the closed cell foam layer 3 in FIG.

FIG. 5 shows a further different embodiment from the above, in which the closed-cell foam layer 3 in the floor material 1 is replaced with a buffer layer having appropriate flexibility or elasticity such as non-woven fabric or glass wool. Also, it is possible to reduce the impact sound.

As a confirmation of the effect of the present invention, JIS A1
A floor impact sound test was conducted based on 418. The results are shown below.

In the impact sound damping floor according to the present invention, natural wood of the same material as plywood (plywood) or flooring described later as a support layer, polyolefin closed cell foam as a foam layer, and hemispherical synthetic rubber as a protrusion. Using a laminated sheet of vinyl chloride and non-woven fabric as a damping sheet laminated on plywood, and using solid natural wood as a flooring fixed to the uppermost surface of the flooring, the floor size is set to 1 m ² and 20 sheets are used. The protrusions were fixed at equal intervals to form a test piece, which was placed on the concrete flab.

Invention A = Plywood (Veneer) for Support Layer 5.
The thickness is 5 mm, the closed-cell foam layer is 5 mm thick underneath it, and the protrusion of 10.5 mm height (approximately radius) is fixed to the notch hole provided in the foam layer, and the flooring is 12 mm on the support layer.
The thickness was laid and the total thickness was 28 mm. Invention B = Plywood having a thickness of 5.5 mm as a supporting layer, a closed-cell foam layer having a thickness of 5 mm is laminated below the support layer, and a notch hole provided in the foam layer has a protrusion having a height of 10.5 mm (approximately radius). After being fixed, a vibration damping sheet having a thickness of 1.5 mm was laminated on the plywood, and a flooring having a thickness of 12 mm was laid on the vibration damping sheet to have an overall thickness of 29.5 mm. Inventive C = Plywood having a thickness of 5.5 mm as a support layer, a protrusion having a height of 18 mm and a base surface having a diameter of about 20 mm is directly fixed to the lower side thereof, and a flooring having a thickness of 12 mm is laid on the plywood to have an overall thickness of 35. It was set to 0.5 mm. Inventive D = Plywood 5.5 mm thick as the support layer, a 10 mm high protrusion is directly attached to the lower side of the support layer, a damping sheet of 1.5 mm thick is laminated on the plywood, and a flooring of 12 m is laminated thereon.
m thickness was laid and the total thickness was 29 mm. -A slab with a cement reinforcing bar and a thickness of 140 mm was measured as a reference. As a known example, the closed-cell foam layer has a thickness of 20 mm, a plywood 9 mm thickness and a vibration damping sheet 1.6 are laminated on the upper side thereof, and a flooring 12 mm thickness is laid on the laminated layer, and the total thickness 42.
The floor structure was 6 mm.

Measuring frequencies 63, 125, 250, 50
At 0, 1 k (each Hz), the impact sound measurement value dB and the level difference from the control object (minus is the value dB which is more attenuated than the control object) are as shown in the following table. The numerical values in the table below are shown as "measured values (level difference)".

[0026] 〔table〕 Floor \ Measurement value [63Hz] [125Hz] [250Hz] [500Hz] [1KHz] Invention A: 69 (-1), 73.5 (-5), 77 (-4), 65 (-16), 52 (-28) Invention B: 65 (-5), 71.5 (-7), 75.5 (-5.5), 65 (-16), 51.5 (-28.5) Invention C: 61.5 (-8.5), 72 (-6.5), 74 (-7), 65 (-16), 52 (-28) Invention D: 60 (-10), 68 (-10.5), 75 (-6), 68 (-13), 53.5 (-26.5) ・ Comparison: 70 78.5 81 81 80 ・ Public examples: 69 (-1), 78 (-0.5), 80 (-1), 71 (-10), 58 (-22)

As described above, the present inventions A, B, C and D have a clear impact sound damping effect, and
Both can make the overall thickness of the floor thin, especially,
Even if the foam layer is made sufficiently thin and is formed to be 1/3 or more thinner than the thickness of the foam layer in the conventionally known floor structure, a clear impact sound damping effect can be obtained.

[0028]

As described above, according to the present invention, rubber, synthetic rubber or mixed rubber is used as a protrusion, and an air layer is formed below the support layer to form a flooring material. It is possible to provide a floor exhibiting a sound damping effect, particularly a preferable damping effect for impact sound, by the interaction of the above, and it is possible to make the floor thinner than those heretofore known.

In particular, a foam layer is provided below the support layer, a small cutout hole provided in the foam layer is provided with a protrusion, and an air layer is formed below the foam layer. If it can be supported, not only the thickness of the foam layer but also the overall thickness of the flooring material can be significantly reduced, and it is possible to provide a floor with a preferable sound attenuation more than that of the conventional floor, and particularly a preferable damping effect for impact sound. it can.

The foaming layer may be a closed-cell foaming layer, an open-cell foaming layer, or a laminated structure of both, so that the damping effect can be selectively adopted.
A buffer layer may be used instead of the foam layer.

In this impact sound damping floor, the floor strength corresponding to the application can be realized by setting the strength of the protrusion to a desired level, and at the same time, the floor deformation due to the foam layer or the like does not occur. . The slight elasticity of the protrusion cushions the impact on the foot at the time of contact with the ground, so that the walking feeling becomes more preferable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts of a floor material according to an impact sound damping floor of the present invention.

FIG. 2 is a partial bottom view of the floor material.

FIG. 3 is a partial sectional view of an impact sound damping floor of the present invention.

FIG. 4 is a cross-sectional view of essential parts of a floor material according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts of a floor material according to another embodiment of the present invention.

[Explanation of symbols]

1 floor material 2 support layers 3 foam layer 4 small cutout holes 5 Sprout 6 Base 7 Air layer 9 Underground 10 Finishing material

   ─────────────────────────────────────────────────── ─── Continued front page       (56) References JP-A-60-5937 (JP, A)                 JP-A-61-146955 (JP, A)                 JP-A-3-93961 (JP, A)                 Actual development Sho 56-47132 (JP, U)                 Actual Kai 4-20332 (JP, U)

Claims (3)

(57) [Claims] 1. A rubber-mixed rubber mixed with calcium carbonate, carbon and other inorganic materials at appropriate intervals below the sheet or film or plate-like support layer, and has a protruding tip portion fixed to a base surface. A solid hemisphere formed as a smaller contact surface, and a protrusion having a hardness of 20 to 60 degrees according to JIS K 6301 is fixed, and a base face having a diameter of 20 mm is 1 m.
Impact with a flooring material having a structure in which the protrusions are arranged so as to support the floor surface in an area corresponding to 10 to 40 pieces per ² and an air layer is formed in a plane that can be formed by the tip of the protrusions. Sound damped floor. 2. A foam layer is laminated at least under the sheet or film or the plate-like support layer, and a plurality of small cutout holes are formed in the foamed layer at appropriate intervals, and the small cutout holes are formed. It is made of mixed rubber mixed with calcium carbonate, carbon and other inorganic materials, and it is formed as a contact surface that is smaller than the fixed base surface of the protruding tip, and the protruding end is formed below the foam layer. Solid hemisphere, JIS K
A 6301 protrusion having a hardness of 20 to 60 degrees is fixed to the support layer, and a protrusion having a base surface of 20 mm in diameter is 1 per 1 m ^2.
A floor material having a structure in which a protrusion is arranged so as to support the floor surface in an area of 0 to 40 pieces, and an air layer is formed in a plane that can be formed by the tip of the protrusion below the foam layer. Impact sound damping floor having. 3. A buffer layer such as a nonwoven fabric or glass wool is laminated at least under the sheet or film or plate-like support layer, and a plurality of small cutout holes are formed at appropriate intervals in the buffer layer. The cutout holes are made of mixed rubber mixed with calcium carbonate, carbon and other inorganic materials,
A solid hemisphere having a protruding tip portion formed as a smaller contact surface than the fixed base surface, and the tip portion protruding below the buffer layer, the hardness of JIS K 6301 being 20 to
A 60-degree protrusion is fixed to the support layer, and the base surface has a diameter of 2
The protrusions are arranged so as to support the floor surface in an area corresponding to 10 to 40 0 mm protrusions per 1 m ² , and an air layer is formed in a plane that can be formed by the tip of the protrusion below the buffer layer. An impact sound attenuating floor having a floor material configured as described above.