JPH0633586A - Impulsive sound damping floor - Google Patents

Abstract

PURPOSE:To exhibit remarkable effect to improve soundproofing and hardly generate deformation such as sinking by dispersing a sound while reducing the building frame vibration of the sound especially the impulsive sound. CONSTITUTION:An independent bubble foaming layer 3 is laminated on the underside of a supporting layer 2 consisting of a sheet or a plywood, and the foaming layer 3 is formed with-a plurality of small cutout holes 4 at proper intervals. In this cutout hole 4, a protruding element 5 made of synthetic rubber which has desired hardness and is formed smaller at the extreme end than the base face 6 as a bonded face, is fixedly secured to the supporting layer 2, and the extreme end part is protruded under the foaming layer 3. An air layer 7 is formed in a virtual plane 8 which can be obtained by the extreme end part of the protruding element 5 under the foaming layer 3.

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.

[0005]

In order to solve the above-mentioned problems, the present invention provides a rubber, a synthetic rubber or a mixed rubber which has a desired hardness with a proper spacing at the lower side of a sheet or film or a plate-like support layer. A shock-damping floor is provided with a floor material having a structure in which a rubber-based or synthetic rubber-based protrusion is fixed and an air layer is formed in the plane formed by the tip of the protrusion. To do.

Further, according to the present invention, at least a foam layer 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 foamed layer. A rubber or synthetic rubber-based protrusion having a desired hardness is fixed to the support layer, and the tip of the protrusion is formed so as to project below the foam layer. A plane that can be formed by the tip of the protrusion below the foam layer. It is also characterized in that the impact sound damping floor is provided by having a flooring material having an air layer formed on a (virtual plane).

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. In this cutout hole, a rubber or synthetic rubber-based protrusion having a desired hardness is fixed to the support layer, and its tip portion is formed so as to protrude below the buffer layer. The impact sound damping floor is also characterized by having a flooring material in which an air layer is formed in a plane that can be formed by the parts.

Furthermore, the protrusion in each of the above constructions is
Since the protruding tip portion is formed as a smaller contact surface than the fixed base surface, the soundproofing effect is further enhanced.

[0010]

[Operation] Vibration is absorbed by the rubber or synthetic rubber protrusions, the propagation of sound is attenuated, and at the same time, the sound, especially the impact sound, is diffused in the air layer that is present in the horizontal direction. Exert. 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 noise, and generate sound in the air layer 7. To prevent the sound from propagating to the base surface 9 and to achieve a sufficient soundproofing effect.

The shape of the protrusion may not be the above-mentioned hemispherical shape, but may be a polygonal hemispherical body, an inverted truncated cone or an inverted truncated pyramid, or a modified shape thereof, and the contact surface with the base surface 9 is a base. Face 6
Although the smaller shape is most preferable, the purpose and effect can be achieved by the overall structure of the floor of the present invention even if the shape is columnar or prismatic, or the above-mentioned inverted shape.

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, and a total thickness of 35 It was set to 0.5 mm. Invention D = Plywood having a thickness of 5.5 mm as a supporting layer, a protrusion having a height of 10 mm is directly fixed to the lower side of the plywood, a vibration damping sheet having a thickness of 1.5 mm is laminated on the plywood, and a flooring of 12 m is provided thereon.
m thickness was laid and the total thickness was 29 mm. -A slab having a cement reinforcing bar and a thickness of 140 mm was measured as a reference. As a publicly known example, the closed-cell foam layer has a thickness of 20 mm, a plywood 9 mm thickness and a 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)".

[Table] Floor / measured value [63 Hz] [125 Hz] [250 Hz] [500 Hz] [1 KHz] -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 layer 3 Foam layer 4 Small notch hole 5 Protrusion 6 Base surface 7 Air layer 9 Underground 10 Finishing material

Claims (5)

[Claims] 1. A plane in which a rubber- or synthetic-rubber-based protrusion having a desired hardness is fixed to the lower side of a sheet or film or a plate-like support layer at an appropriate interval and which can be formed by the protrusion tip portion. An impact sound damping floor having a floor material having an air layer formed on the floor. 2. A sheet or film or a plate-like support layer is laminated with at least a foam layer, and a plurality of small cutout holes are formed at appropriate intervals in this foamed layer. A rubber- or synthetic rubber-based protrusion having a hardness of 10 mm is fixed to the support layer, and its tip portion is formed so as to project below the foam layer, and within a plane that can be formed by the protrusion tip portion below the foam layer. An impact sound attenuating floor having a floor material having a structure in which an air layer is formed. 3. The impact sound damping floor according to claim 2, wherein the foam layer is formed of a closed cell foam, an open cell foam, or a laminated layer of the closed cell foam and the open cell foam. 4. A buffer layer such as a non-woven 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. A rubber or synthetic rubber-based protrusion having a desired hardness is fixed to the support layer in the hole, and its tip portion is formed so as to project below the buffer layer, and is formed by the protrusion tip portion below the buffer layer. An impact sound attenuating floor having a floor material having a structure in which an air layer is formed in a plane to be obtained. 5. The protruding tip portion of the protrusion is formed as a contact surface smaller than that of the fixed base surface.
The impact sound damping floor according to any one of 1.