JP3353048B2 - 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 soundproofing effect and is particularly suitable for isolating impact sounds such as impact sounds.

[0002]

2. Description of the Related Art Conventionally known floors capable of attenuating floor sounds are made of glass wool or other fiber material having a sufficient thickness.
It has a structure in which an inorganic foam material or a polyolefin foam synthetic resin material, a plywood, a particle board, a concrete panel, or the like, and a vinyl chloride vibration-damping sheet are laminated as necessary. Since the former layer, such as a foam material, sinks over time to cause distortion on the floor surface, wooden or metal joists are used to support the floor material in order to eliminate the sinking.

[0003]

However, the bearing by the joist 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 joist. This is a solution philosophy that does not conform to the above, and is not preferable in this respect. In order to solve this drawback, there is also a concept of sandwiching a foam material etc. on either the upper or lower surface of the joist, but in this case, the cause of the sinking is added again to the joist to prevent sinking. Therefore, it was difficult to be a preferable solution.

In view of the above-mentioned circumstances, the present invention has a remarkable effect for improving soundproofing by dispersing sound while reducing the body vibration of the sound, especially the impact sound, and at the same time, it is possible to reduce the impact such as sinking or the like which is hardly deformed. It has a unique floor support structure to develop a sound attenuating floor.

[0005] In order to solve the above-mentioned problems, small cutout holes are formed in the flooring material at appropriate intervals in a sound attenuating layer formed of a foamed layer, and the height of the notch is approximately equal to the thickness of the sound attenuating layer in the hole. And a configuration in which a rubber-based protrusion having compression hardness greater than that of the sound attenuating layer is provided.

In the present invention, a sheet or a film is laminated on both upper and lower surfaces of a sound attenuating layer having a foam layer, and small notches are formed in the sound attenuating layer at appropriate intervals. In the hole, a floor material having a rubber or synthetic rubber-based projection having a substantially spherical shape at a height substantially equal to the thickness of the sound attenuating layer and having a compression hardness greater than that of the sound attenuating layer is inserted. It is characterized in that the floor load is provided by the above-mentioned projections to provide an impact sound attenuating floor.

It is preferable that the protrusion is made of a mixed rubber containing calcium carbonate, carbon and other inorganic materials.

The sound attenuating layer is preferably formed of, for example, a closed cell foam layer, a simultaneous cell foam layer, or a laminate of a closed cell foam layer and a simultaneous cell foam layer. It may be formed by lamination with a buffer layer other than a foam layer having an appropriate thickness and including a myriad of small voids.

The protrusion may be formed as a flat surface having a base surface, that is, an upper surface, which can be fixed to the support layer, and a lower end portion having a smaller contact surface, for example, as a downward hemisphere. The present invention is directed to the above substantially spherical shape.

[0010]

[Function] The sound attenuating layer absorbs and diffuses vibration to attenuate the propagation of sound, and rubber or synthetic rubber-based projections also absorb vibration to attenuate the propagation of sound. Since the bearing is supported, the floor does not sink due to the compression deformation of the sound attenuation layer.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, a floor material 1 which is a main component of an impact sound attenuating floor according to the present invention is made of plywood, vinyl chloride or other synthetic resin sheet, rubber sheet, non-woven sheet, fiber sheet, paper sheet, or thickness. Foam sheet of about 1 mm or less, or each film, other optional materials,
A closed cell foam layer 3 of vinyl chloride, urethane, or the like is bonded and laminated on the lower surface of the support layer 2 which is a laminated material and is made of a material that does not cause practically inconvenient settlement on the floor surface,
A plurality of small notches 4 are previously formed at predetermined intervals in the foam layer 3, and the small notch 4 has a flat base surface 6 having a substantially full size therein, Insert a rubber or synthetic rubber-based protrusion 5 mainly made of rubber or synthetic rubber or a mixed rubber mixed with calcium carbonate, carbon or other inorganic material having the same height as the thickness, and attach the base surface 6 to the support layer 2. It is glued to and fixed.

If the support layer 2 is a plywood or the like, it is convenient for fixing by nailing or the like. However, even if it is a sheet or a film, the flooring 1 can be maintained in a bonded state and a flooring can be laminated and fixed, so that it is practically used. Can be provided.

The foam layer 3 has a thickness of about 5 mm or more, and the entire thickness of the floor material 1 depends on the surface of the finishing material 8 such as flooring to be laid on the floor material 1 from the ground surface 7 to be installed. Is preferably set so that the thickness up to the desired floor position can be accommodated. A polypropylene film or other protective sheet or film may be provided on the lower surface of the foam layer 3.

The protruding member 5 has a vibration absorbing property and a compressive strength capable of supporting an appropriate load by a plurality of protruding members 5 arranged at a predetermined interval (a material having little bending). ), For example, JIS hardness (JIS K63)
01) about 30 to 70 degrees, preferably about 55 or more.

The illustrated protrusion 5 is formed such that a flat surface of a hemisphere is used as a base surface 6 and a tip end (ball top) of the protrusion is formed as a slightly flat surface. According to this, since the surface is bonded to the support layer 2 in a stable state and the bonding state is close to the point contact with the ground surface 7, the vibration sound is absorbed and the impact sound is absorbed, and the sound to the ground surface 7 is absorbed. Can be prevented from being propagated, and a soundproofing effect can be achieved.

The shape of the projection may not be the above-mentioned hemisphere, but may be a polygonal hemisphere, an inverted truncated cone or an inverted pyramid, or a modified shape thereof, based on the contact surface with the base surface 7. Face 6
Although the smaller shape is most preferable, the purpose and effect can be achieved by the entire structure of the floor of the present invention, even if the shape is a cylinder or a prism, or an inverted shape as described above. If the small cutout 4 of the foam layer 3 has a holding shape or a protective sheet or a film is provided on the lower surface of the foam layer so as not to fall off from the foam layer 3, the shape is spherical. You can also.

Further, the interval between the protrusions 5 (the number of the protrusions) can be appropriately set according to the floor use and the required withstand load. For example, as long as the base surface 6 is set so that the load capacity of the floor surface on which 20 hemispherical projections 5 each having a diameter of 20 mm are arranged at a uniform interval per 20 m ² as shown in the drawing is at least 100 kg or more. , And have sufficient practical strength. It is most appropriate to arrange 10 to 40, preferably 20 to 30, protrusions per m ² .

The floor material 1 is laid on the base surface 7 and, if necessary, a vibration-damping sheet made of a vinyl chloride resin or a vibration-damping sheet formed by laminating a vinyl chloride resin and a nonwoven fabric on the support layer 2. By laminating and adhering the vibration damping sheets 9 and laminating and fixing an arbitrary flooring 8 thereon, an impact sound attenuating floor can be constructed.

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 simultaneous cell foaming layer 3A. In this case, a spherical projection 5A having the same diameter as the thickness of the laminate is inserted into the small notch hole 4, and the upper and lower surfaces of the laminate are covered with sheets or films 10 and 11 made of polypropylene or another material. . According to this, the simultaneous cell foam layer 3A
The impact sound can be diffused by the simultaneous bubbles in A, and the soundproofing effect of the projection 5A is sufficient.

As another embodiment not shown, the floor material 1
In this case, the impact sound can be attenuated by using a simultaneous cell foam layer instead of the closed cell foam layer 3.

FIG. 5 shows an embodiment which is further different from the above. In place of the closed-cell foam layer 3 in the flooring 1, the closed-cell foam layer 3 and an infinite number of small voids such as mesh-processed materials are included. The sound attenuating layer is formed by a laminated body with the buffer layer 3B having an appropriate thickness as described above, so that the impact sound can be attenuated.

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

The impact sound attenuating floor according to the present invention comprises a plywood (plywood) or a natural wood of the same material as the flooring described later as a support layer, a polyolefin-based closed-cell foam as a foam layer, and a slightly lower end as a protrusion A. Using a flat hemispherical synthetic rubber and a slightly flat spherical synthetic rubber as the protruding part B, a laminated sheet of vinyl chloride and a nonwoven fabric as a vibration damping sheet laminated on a plywood is placed on the top surface of the floor material. Use solid natural wood as the fixed flooring and reduce the floor size to 1
m ² , 20 test pieces were fixed at equal intervals to form a test body, which was placed on a concrete flap.

Invention A = Plywood (Veneer) 9 m for support layer
m, and a closed cell foam layer 18 mm thick is laminated below the lower layer. A projection A having a height of 18 mm (corresponding to a radius) is fixed to a notch hole provided in the foam layer.
m thickness was laid, and the total thickness was 39 mm. (A structure without the vibration damping sheet 9 in FIG. 3). Invention B = A simultaneous foam layer 18 mm in which the support layer is made of plywood 9 mm thick and the upper and lower surfaces are covered with PP sheets of 0.2 mm each below. Thickness was laminated, and a protrusion B having an upper and lower width of 18 mm was previously mounted in a notch hole provided in the foam layer, and a 12 mm thick flooring was laid on the plywood to have an overall thickness of 39.4 mm.・ Invention C = The supporting layer is 5.5 mm thick plywood, and the lower side is covered with a PP sheet of 0.2 mm each on the upper and lower surfaces of a laminate of a closed cell foam layer of 5 mm thickness and a simultaneous cell foam layer of 8 mm thickness. The foamed layer was laminated, and a protrusion B having a vertical width of 13 mm was previously mounted in a cutout provided in advance in the foamed layer, and a 12 mm thick flooring was laid on the plywood to have an overall thickness of 30.9 mm. (The structure of FIG. 4) D: The support layer is 5.5 mm thick plywood, under which a closed cell foam layer 5 mm thick and acrylic and polyester fibers having a thickness of 1 mm on both sides, About 0.2mm in the middle
A 4 mm-thick mesh-structured buffer layer made by weaving the same fiber of the same thickness into a mesh is laminated, and a laminated body having a notched hole provided in advance is provided. A is fixed, a PP sheet of 0.2 mm is covered on the lower surface of the laminate, a 1.6 mm thick vibration damping sheet is laminated on the plywood, a 12 mm thick flooring is laid thereon, and a total thickness of 28.3 m is provided.
m. (The configuration shown in FIG. 5) ・ A slab having a thickness of 140 mm with cement reinforcing bars was measured as a comparison product. As a well-known example, the closed cell foam layer is 20 mm thick, a plywood 9 mm thick and a vibration damping sheet 1.6 are laminated on the upper side, a 12 mm thick flooring is laid thereon, and the overall thickness 42.
The floor structure was 6 mm.

Measurement frequencies 63, 125, 250, 50
At 0.1 and 1 k (each Hz), the impact noise measurement value dB and the level difference from the comparison object (minus is a value attenuated more than the comparison object dB) are as shown in the following table. The numerical values in the table below are shown as “measured values (level differences)”.

[Table] Measured value of floor 〔[63 Hz] [125 Hz] [250 Hz] [500 Hz] [1 KHz] ・ A: 66 (-4), 75 (-3.5), 77 (-4) , 60 (-21), 48 (-32) ・ Invention B: 67.5 (-2.5), 75 (-3.5), 76 (-5), 56.5 (-24.5), 46 (-34) ・ Invention C : 67 (-3), 74 (-4.5), 74 (-7), 55 (-26), 46 (-34)-D: 64.5 (-5.5), 75.5 (-3), 78 (- 3), 63 (-18), 49.5 (-30.5) ・ Comparative product: 70 78.5 81 81 80 ・ Known 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.
In any case, the load applied to the floor was supported by the protrusions A or B and hardly compressed, so that the sound attenuating layer was not compressed and did not sink into the floor.

[0028]

As described above, according to the present invention, a sound attenuator, particularly a preferable damping effect for impact sound, can be provided by the rubber or synthetic rubber-based protrusion and the sound-attenuating layer. Since the floor load is supported, it is possible to provide a floor which does not cause sinking of the floor even if it has a sound attenuation layer such as a foam layer. In addition, by setting the strength of the protruding part as desired, it is possible to realize a floor strength corresponding to the intended use, and the slight elasticity of the protruding part cushions the impact on the foot at the time of contact with the ground. The floor is more preferable.

Further, since the protrusions are arranged at the same height in the sound attenuating layer formed below the support layer, it is convenient for handling floor materials and can simplify floor construction. The sound attenuating layer is a closed cell foam layer, or a simultaneous cell foam layer,
Alternatively, a damping effect can be selectively adopted by adopting a laminated structure of both. Further, a cushioning material other than the foam may be employed instead of the foam layer.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a floor material according to an impact sound attenuating floor of the present invention.

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

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

FIG. 4 is a sectional view of a main part of another embodiment of the flooring material according to the present invention.

FIG. 5 is a sectional view of a main part of still another embodiment of the flooring according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor material 2 Support layer 3 Foam layer 4 Small notch hole 5 Protrusion 6 Base surface 7 Underground 8 Flooring 9 Damping sheet 10, 11 Coated sheet or film

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 15/18

Claims (2)

(57) [Claims] 1. A sheet or film is laminated on both upper and lower surfaces of a sound attenuating layer having a foam layer, and small notches are formed in the sound attenuating layer at appropriate intervals. It has a floor material in which a rubber or synthetic rubber-based protrusion having a substantially spherical shape at a height substantially equal to the thickness of the layer and having a compression hardness greater than that of the sound attenuating layer is inserted, and a floor load is reduced. An impact sound attenuating floor having a configuration supported by the projection. 2. The spigot is made of a mixed rubber containing calcium carbonate, carbon and other inorganic materials.
The impact sound attenuating floor according to the above.