JPH11172906A - Soundproof floor material and soundproof floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof floor material of which a cushioning property is maintained in a suitable state. SOLUTION: A soundproof floor material 4 made of a cushioning material having elasticity as well as a floor board 3 and to be adhered on a floor slab 6 is provided. The cushioning material comprises a sheet 1 and a plurality of cylindrical projections 2, each of the cylindrical projections 2 is provided on one surface of the sheet 1, a space 2b is provided in the inside of each of the cylindrical projections 2, an upper end surface 2a of each of the cylindrical projections 2 is adhered on a back surface of the floor board 3, and closed spaces are respectively formed by each of the cylindrical projections 2, the sheet 1 and the back surface of the floor board 3 on this soundproof floor material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof floor material comprising a floorboard and an elastic cushioning material, which is adhered to a floor slab, and to such a soundproof floor structure.

[0002]

2. Description of the Related Art Hitherto, in apartment houses such as condominiums, soundproof flooring has been directly adhered to a concrete floor slab. This type of soundproof flooring is disclosed in
JP-A-241264, JP-A-2-74755, Japanese Utility Model Laid-Open No. 3
This is known from JP-A-61043. As these soundproofing flooring materials, a type of soundproofing flooring material in which a mat made of rubber, urethane, synthetic resin, nonwoven fabric, fiber or the like having cushioning properties is interposed between a woody decorative board and the like has been proposed.

[0003]

As described above, the soundproofing flooring material provided with a cushion layer on a wooden decorative board has a better soundproofing effect as the cushion layer is softer. For this reason,
In many cases, rubber or resin is foamed at a high magnification or the bulk density of fibers is reduced. In addition, in terms of shape, it is devised so as to reduce the impact received on the wooden decorative board by providing unevenness, slitting or punching.

[0004] However, if the cushion layer is made too soft, the floor sinks greatly when heavy objects are placed on the floorboard. In addition, when walking on the floor for a long time, symptoms similar to seasickness appear, and there is a practical problem. Such a problem is particularly likely to occur when the expansion ratio is large or when the fiber mat has a low bulk specific gravity.

[0005] On the other hand, a non-foamed solid cushion layer made of rubber or synthetic resin absorbs impact by the elastic force of the material itself. For this reason, there is a disadvantage that the impact absorption performance is lower than that of the foam.

[0006] Such a conventional soundproofing floor material is generally attached by applying a urethane-based, rubber-based, or epoxy-based adhesive on a concrete floor slab and pressing the soundproofing floor material. If such an adhesive enters between the joints of the floorboard and hardens, it interferes with the cushioning properties of the soundproof flooring material, and therefore it is not preferable to harden the adhesive other than on the adhesive surface.

However, the concrete surface has large irregularities,
A large amount of adhesive is applied in order to enhance the adhesiveness with the soundproofing floor material. In addition, since it is necessary to adjust the position at which the soundproofing floor material is attached, a type having a long curing time and a low viscosity is used. As described above, in the conventional construction method, the adhesive may flow due to the pressure, partially concentrate and harden, and may hinder the cushioning property.

[0008] It is an object of the present invention to provide a sound-insulating flooring material in which cushioning properties are maintained in an appropriate state.

[0009]

SUMMARY OF THE INVENTION The present invention is a soundproof flooring material comprising a floorboard and a cushioning material having elasticity, which is affixed to a floor slab, wherein the cushioning material comprises a sheet, a plurality of cylindrical projections. Wherein each of the cylindrical projections is provided on one surface of the sheet, a space is provided inside each of the cylindrical projections, and an upper end surface of each of the cylindrical projections is a back surface of the floor plate. And a soundproof floor material in which a closed space is formed by each of the tubular projections, the sheet, and the back surface of the floorboard.

The present inventor has studied various types of soundproofing flooring for the purpose of developing a soundproofing flooring exhibiting optimal cushioning properties. During this time, the inventor also investigated the usefulness of the soundproof flooring including the conventional cushioning.

When a foam such as that used in a conventional soundproof flooring material is used as the cushion layer, the cushioning property is generated when air sealed in the foam exerts an air cushion effect. It was found that there was a defect that the cushioning property was reduced due to the air bleeding due to aging.

It has also been considered to use an elastic body inflated like a balloon as a cushion layer of a soundproof floor material.
However, such an elastic body is inflated from the inside with compressed air or a foaming agent or the like, and is manufactured in a state in which a pressurized gas is sealed therein. However, it requires a high level of technology to adjust the uniform shape and the internal pressure. The shape of the elastic body is maintained exclusively by the internal pressure. It has been found that the cushioning property of such an elastic body is almost the same as that of the foamed foam, and that the cushioning property is likely to decrease due to a decrease in internal pressure.

Further, as in the prior art, a cushioning layer provided with irregularities, slits and punching to reduce the impact is laid while pressing on a large amount of adhesive applied to the floor slab. However, it has been found that in such a soundproof flooring material, the adhesive flows into the uneven portions, slits, and punched portions provided for providing cushioning properties and solidifies, thereby reducing cushioning properties and reducing soundproofing performance. In particular, when the adhesive flows into the joint portion of the soundproofing floor material and solidifies, the cushioning property of the joint portion is reduced, and the soundproofing performance is significantly reduced.

In the cushioning material according to the present invention, one or more cylindrical projections having a sealable space on the inner surface are provided on the surface of the sheet. This cushioning material adheres the upper surface of the cylindrical projection to the back surface of a floor board such as a wooden decorative board with an adhesive or the like. This allows
The internal space of the cylindrical projection is closed in a state where pressure is not applied, and a sealed space exhibiting cushioning properties is formed. In the sound-insulating flooring material of the present invention, the solid-type elastic cylindrical projection absorbs impact by elastic deformation, and at the same time, exhibits an impact-absorbing ability by an air cushion effect due to compression of the closed space.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cutaway perspective view of a soundproof floor structure according to an example of the present invention. This figure partially includes a cross-sectional view of the soundproof floor structure. The soundproof flooring material of the present invention, on the sheet 1,
One or more cylindrical protrusions 2 having a sealable shape are provided on the inner surface, and the upper surface 2a of the cylindrical protrusion 2 is adhered to the back surface of the wooden decorative plywood 3 with an adhesive or the like, and the space in the cylindrical protrusion 2 is provided. 2b
Is closed to form a closed space. This soundproof floor material 4
Is placed on the concrete floor slab 6 via the adhesive layer 5.

In the present invention, the back surface of the floorboard is supported by the cylindrical projection. The area where this hollow cylindrical projection contacts the floorboard is:
It is smaller than the area where the solid projection contacts the floorboard. Also,
Solid projections have higher rigidity than hollow projections. For this reason, the cylindrical projection according to the present invention has a contact surface dispersed and smaller in rigidity as compared with a solid projection, so that variation in contact with the floor plate is less likely to occur. The cylindrical projection according to the present invention can easily secure an area to be adhered to the back surface of the floorboard even if the upper end surface has irregularities.

The cylindrical projection according to the present invention may have a cylindrical shape, a triangular or quadrangular prism shape, or a shape combining them, as long as a closed space can be obtained by contacting the upper surface with the plate.

According to the present invention, the portion of the back surface of the floor plate facing the closed space is 15 to 80% of the area of the back surface of the floor plate.
It is preferred that If the floorboards in this range are supported by the enclosed space, the soundproof performance will be most effectively exhibited. Fifteen
%, The proof strength for supporting the load of the heavy object placed on the floorboard decreases, and the sinking phenomenon of the floor occurs. If it exceeds 80%, the shock absorbing ability is deteriorated, and the soundproofness is poor.

In the present invention, the floor board is supported by bringing the upper surface of the cylindrical projection into contact with the back surface of the decorative wood board, and further facing the back surface of the decorative wood board to the closed space. The impact applied to the wooden decorative board is transmitted to the cushioning material, but in the present invention, the cushioning material has rubber elasticity, and furthermore, since the enclosed space serves as an air cushion, the impact is caused by the elastic deformation of the cushioning material. Absorbed.

FIG. 2A is a sectional view before the cushioning material is deformed. FIG. 2B is a cross-sectional view after the cushioning material has been deformed. As shown in FIG. 2A, the floorboard 3 has A
Directional impact is applied. At this time, in the soundproof flooring material of the present invention,
As shown in FIG. 2B, the cylindrical projection 2 is deformed and absorbs an impact. At this time, the sealed space 7 shown in FIG. 2 (a) also exhibits the shock absorbing performance of the air cushion effect by compressing the air sealed in the projections with the deformation of the projections. Demonstrate the soundproof effect.

The thickness of the cushioning sheet is 0.2 to 1.5.
mm is preferred. Within this range, it is possible to sufficiently follow the unevenness of the concrete slab floor, and the adhesion to the foundation is improved. If it is less than 0.2 mm, molding becomes difficult, and if it exceeds 1.5 mm, the ability to follow the ground unevenness such as floor slabs deteriorates, and it is easy to cause the base and cushioning material to float during construction. It is easy to be a complaint that an abnormal sound is generated from the floating part when walking.

Preferably, the cylindrical projections are interconnected by reinforcing ribs provided on the surface of the sheet. Such a reinforcing rib assists the self-supporting of the cylindrical projection, increases the strength of the cushioning material as a whole, and has effects such as easy removal of the product from the mold at the time of molding. It is desirable to adjust the cross-sectional shape, connection length, and number of the reinforcing ribs according to the number and strength of the cylindrical projections.

FIG. 3A is a perspective view of an example of a reinforcing rib. FIG. 3B is a cross-sectional view of the cushioning material of FIG. 3A taken along line BB. In the cushioning material shown in these figures,
A plurality of cylindrical protrusions 2 and reinforcing ribs 8a, 8b,
8c and 8d are provided. The outer circumference of the cylindrical projection 2
Reinforced by reinforcing ribs 8a, 8b from four directions,
These reinforcing ribs 8a and 8b connect the adjacent cylindrical projections 2 to each other. 3 (a) and 3 (b), additional reinforcing ribs 8c and 8d further
It is provided between. These reinforcing ribs 8c, 8d
Works such as increasing the strength of the cushioning material.

The wall thickness of the cylindrical projection is desirably large in order to support the load of a heavy object placed on the wooden veneer and to prevent sinking due to the load. However, as the wall thickness increases, the rigidity of the cylindrical projection itself increases, and the absorption capacity due to elastic deformation decreases, or the amount of deformation decreases,
The air cushion effect is also reduced.

According to the present invention, when the cylindrical projection is cut along a plane parallel to the back surface of the floor plate, the cylindrical projection has a length of 10 to 80% of the outer peripheral length of the cylindrical projection. Preferably it has a wall thickness of 50% or less of the maximum wall thickness. By making a thin part in this range where the wall thickness is partially 50% or less of the maximum wall thickness, elastic deformation of the cylindrical projection due to impact is facilitated, and the sealed air is compressed. The thin portion of the wall can be easily inflated to promote the air cushion effect. The maximum wall thickness is 5
In the portion exceeding 0%, the swelling amount is small and the air cushion effect cannot be sufficiently exhibited.

FIG. 4A is a plan view of an example of a cylindrical projection. FIG. 4B is a cross-sectional view of the cylindrical projection of FIG. 4A taken along line CC. As shown in FIGS. 4A and 4B, the cylindrical projection 9 has an upper end surface 9a and is provided on the seat 1. The cylindrical projection 9 has a space 9b therein. The cylindrical projection 9 has a thin portion 9c.
Are provided radially. This thin portion 9c is
When a load is applied to the floor plate provided so as to be in contact with the upper end surface 9a, the elastic deformation of the cylindrical projection 9 is facilitated, and the space 9b
By compressing the air sealed inside, the thin portion 9c
Expands, increasing the air cushion effect. FIG. 5 is a plan view of the cylindrical projection of FIG. 4A in a deformed state. As shown in FIG. 5, the cylindrical projection 9 has a thinned portion 9c that swells to enhance the shock absorbing performance.

When constructing the sound-insulating flooring material, the sound-insulating flooring material is placed on an uncured adhesive applied in large amounts on a concrete floor slab, and is pressed, pasted, or positioned. For this purpose, the soundproof flooring is slid. The soundproofing flooring material of the present invention is such that the surface where the cushioning material is in contact with the floor slab is made of a sheet, and has no recesses or slits, and is flat.
There is no fear that the adhesive flows into the concave portion or the slit portion at the bottom of the cushioning material and solidifies, thereby impairing the soundproofing effect.

In the present invention, it is preferable to provide a penetrating portion communicating with the sheet in the thickness direction of the sheet between the cylindrical projections. When penetrating a plurality of sound-insulating floor materials to a floor slab with an adhesive, the surplus adhesive passes through the penetrating portions and escapes from the penetrating portions and disperses. No concentration of adhesive. The shape of the penetrating portion is preferably a shape in which the adhesive is passed and the passed adhesive is not concentrated but dispersed.

FIG. 8A is a cross-sectional view of an example of the soundproof floor material before construction. FIG. 8B is a cross-sectional view of the soundproof floor material of FIG. 8A after construction. As shown in FIGS. 8A and 8B, the cushioning material 14 is often provided with a concave portion, a groove, or a slit for increasing a cushion effect. However, the adhesive 12 flows into the groove 15 and solidifies, and the cushioning effect of the soundproofing floor material is impaired, and the soundproofing performance is reduced. Further, when the adhesive 12 flows into the joint portion and solidifies, the cushioning property when an impact is applied to the joint portion is reduced, and the soundproofing performance is significantly reduced.

In the sound-insulating flooring material of the present invention, a penetrating portion for communicating both sides of the sheet is provided in the middle of the cylindrical projection provided on the cushioning material. FIG. 6A is a plan view of an example of a cushioning material provided with a penetrating portion. FIG. 6B is a cross-sectional view of the cushioning material of FIG. 6A taken along the line DD. The cushioning material of this example has two types of different penetrating portions 10, 1 between the cylindrical projections 2.
1 is provided. The penetrating part 10 has four cylindrical projections 2
Is formed in the portion of the sheet surrounded by the circle so as to form a round hole when viewed from above. On the other hand, the penetrating portion 11 is formed so that two cuts intersect, although between the similar cylindrical projections 2.

FIG. 7A is a cross-sectional view of a soundproof floor material according to an example of the present invention before construction. FIG. 7B is a cross-sectional view of the soundproof floor material of FIG. 7A after construction. FIGS. 7A and 7B
As shown in the figure, the adhesive 12 passes through the penetrating portion 11 and is dispersed and solidified. Thus, the soundproof flooring material of the present invention can prevent the adhesive 12 from intensively flowing into the joint portion 13 and the like at the time of construction and solidify, and can exhibit excellent soundproof performance.

The material of the elastic cushioning material according to the present invention may be synthetic rubber such as styrene / butadiene rubber, ethylene / propylene rubber, chloroprene rubber, butadiene rubber, nitrile rubber, or natural rubber, or olefin or styrene rubber. , A thermoplastic rubber such as a PVC type, or a soft plastic such as soft vinyl chloride, polyethylene, EVA, or polyurethane, and these may be used alone or in combination of two or more. It may be used by molding.

[0033]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The present invention will be described in more detail. (Example 1) A rubber cushioning material having the shape shown in FIGS. 3A and 3B was prepared. Rubber hardness (JIS-K-6301
65) and the total thickness is 1
It was 2 mm. The thickness of the sheet is 0.5 mm, the outer diameter of the cylindrical projection is 12 mm, and the inner diameter is 8 mm.
They were arranged in a grid pattern at mm intervals. Reinforcement rib is 7m high
m, thickness 1 mm, and stretched between cylindrical projections. The portion of the back surface of the floor plate that faces the closed space was about 30% of the area of the back surface of the floor plate. A 6 mm-thick wooden decorative plywood was bonded to the cushioning material as a floorboard to produce a soundproof flooring material of this example.

For a concrete floor slab 150 mm thick,
After applying an epoxy-based adhesive at 800 to 1000 g / m ^2, the sound-insulating floor material of the present embodiment is pressed and laid to manufacture the sound-insulating floor structure of the present embodiment, and according to JIS-A-1418,
The floor impact sound level was measured. Table 1 shows the results.

(Example 2) A cushioning material according to the present example was manufactured by using a rubber having a hardness of 65 and a sheet thickness of 1.0 mm. As the cylindrical projection, as shown in FIG.
mm, a projection having an inner diameter of 14 mm was used. On the inner periphery of the cylindrical projection, a thickness of 0.
A thin portion having a thickness of 3 mm and a width of 4 mm was provided. This cylindrical projection,
The sheets were arranged in a grid pattern at intervals of 25 mm. In this cushioning material, about 50% of the floorboard bottom area faces the closed space.

A soundproof floor material and a soundproof floor structure of this example were manufactured in the same manner as in Example 1, and the floor impact sound level was measured. Table 1 shows the results.

(Embodiment 3) FIG.
The sound-insulating floor material and the sound-insulating floor structure were manufactured in the same manner as in Example 1 except that a circular through portion having a diameter of 5 mm was provided as shown in FIG. In this example, as shown in FIG. 7, no concentrated inflow of the adhesive into the joint portion was observed. Also,
Also in this example, the floor impact sound level was measured as in Example 1. Table 1 shows the results.

(Comparative Example 1) A floor plate and a floor structure were manufactured in the same manner as in Example 1 except that the JIS-A hardness was changed to 60 and the cylindrical projection was formed into a cylindrical mass having no inner space. . The floor impact sound level was measured in the same manner as in Example 1,
The results shown in Table 1 were obtained.

(Comparative Example 2) As a cushioning material, a 3 mm thick, 2.5 mm square grooved 3
A floorboard and a floor structure were manufactured in the same manner as in Example 1, except that a 0-fold polyethylene foam was used. In this example, the adhesive flowed into the joints of the floorboard and the grooves provided for facilitating the stress deformation, and solidified. The floor impact sound level was measured in the same manner as in Example 1, and the results shown in Table 1 were obtained.

[0040]

[Table 1]

As shown in Table 1, the sound-insulating floor structures of Examples 1 to 3 were different from the floor structures of Comparative Examples 1 and 2 in terms of the floor impact sound (dB), L value, and L class. Was low. In particular, in the sound-insulating floor structures of Examples 1 to 3, 250 to 2
The effect of reducing the sound of kHz was remarkable. In Examples 2 and 3, the effect of reducing the impact sound at 500 Hz was recognized.

[0042]

As described above, in the soundproof flooring material of the present invention,
A sheet provided with one or more cylindrical protrusions having a sealable space therein is used as a cushioning material. This cushioning material is adhered to the floor plate using an adhesive or the like so that the upper end surface of the cylindrical projection is in contact with the floor plate, and a closed space is formed in the cylindrical projection.
Such a soundproofing floor material attenuates the impact energy applied to the floorboard by the elastic deformation of the cylindrical projection and the action effect, and exhibits excellent soundproofing performance.

In the sound-insulating flooring material of the present invention, a thin portion of 50% or less of the maximum wall thickness may be provided on the outer peripheral wall forming the closed space of the cylindrical projection. This thin portion can be arranged at a length of 10 to 80% of the outer peripheral length of the cylindrical projection when the cylindrical projection is cut along a plane parallel to the floor plate. In the soundproofing floor material of the present invention, when the cylindrical projection is elastically deformed, the sealed air is compressed, the thin portion is easily expanded, the air cushion effect is promoted, and a more excellent soundproofing effect is exhibited. .

Further, in the soundproof flooring material of the present invention, the cylindrical projections can be connected by the reinforcing rib provided on the sheet. In the soundproof flooring material provided with the reinforcing ribs, the cylindrical protrusions can be reinforced, and the cushioning material can be easily removed from the mold at the time of molding the cushioning material.

Further, in the soundproof flooring material of the present invention, a penetration portion can be provided on the sheet surface. In the soundproof flooring material provided with the penetrating portion, the adhesive used for bonding to the floor slab during construction can be appropriately released to the penetrating portion and dispersed. In the soundproof floor structure using such a soundproof floor material, the solidification of the adhesive into the soundproof material joint is prevented, and the soundproof performance can be stabilized without lowering the soundproof performance.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a soundproof floor structure according to an example of the present invention.

FIG. 2A is a cross-sectional view before a cushioning material is deformed. FIG. 2B is a cross-sectional view after the cushioning material of FIG. 2A is deformed.

FIG. 3A is a perspective view of an example of a reinforcing rib.
(B) is sectional drawing which cut | disconnected the cushioning material of FIG. 3 (a) along the BB line.

FIG. 4A is a plan view of an example of a cylindrical projection.
(B) is sectional drawing which cut | disconnected the cylindrical protrusion of FIG. 4 (a) along CC line.

FIG. 5 is a plan view of the cylindrical projection of FIG. 4A in a deformed state.

FIG. 6A is a plan view of an example of a cushioning material provided with a penetrating portion. (B) is sectional drawing which cut | disconnected the cushioning material of FIG. 6 (a) along the DD line.

FIG. 7A is a cross-sectional view of a soundproof floor material according to an example of the present invention before construction. (B) is sectional drawing after construction of the soundproofing floor material of Fig.7 (a).

FIG. 8A is a cross-sectional view of an example of a soundproof floor material before construction. (B) is sectional drawing after construction of the soundproof flooring material of FIG. 8 (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet 2,9 Cylindrical protrusion 2a, 9a Upper end surface of cylindrical protrusion 2b, 9b Space in cylindrical protrusion 3 Floor plate 4 Soundproof floor material 5 Adhesive layer 6 Concrete floor slab 7 Sealed space 8a, 8b, 8c, 8d Reinforcement rib 9c Thin part 10, 11 Penetration part 12 Adhesive 13 Joint part 14 Buffer material 15 Groove

Claims (6)

[Claims] 1. It comprises a floor plate and an elastic cushioning material,
A soundproofing floor material adhered to a floor slab, wherein the cushioning material comprises a sheet and a plurality of cylindrical protrusions, and each of the cylindrical protrusions is provided on one surface of the sheet. A space is provided inside the cylindrical projection, and an upper end surface of each of the cylindrical projections is adhered to a back surface of the floor plate. Each of the cylindrical projections, the sheet, and the back surface of the floor plate are hermetically sealed. Soundproof flooring, characterized by having a space. 2. A portion of the rear surface of the floor plate facing the closed space has an area of 15 to 80 of the rear surface of the floor plate.
%. The sound-insulating flooring according to claim 1, wherein 3. The sheet according to claim 1, wherein a reinforcing rib is provided on the one surface of the sheet, and the tubular projections are connected to each other by the reinforcing rib. Soundproof flooring. 4. When the cylindrical projection is cut along a plane parallel to the back surface of the floor plate, the cylindrical projection has a cylindrical shape at a portion of 10% to 80% of an outer peripheral length of the cylindrical projection. The soundproof flooring according to any one of claims 1 to 3, wherein the projection has a wall thickness of 50% or less of a maximum wall thickness of the projection. 5. A sheet having a penetrating portion between the cylindrical projections, the penetrating portion communicating with a thickness direction of the sheet, and the other of the plurality of sheets of the soundproof flooring material. When a surface is adhered to the floor slab with an adhesive, the surplus adhesive passes through the penetrating portion, so that the adhesive does not concentrate on the joint portion of the soundproof flooring, The soundproof flooring material according to any one of claims 1 to 4. 6. A soundproof floor structure comprising the soundproof floor material according to claim 1 and a floor slab, wherein the other surface of the sheet is attached to the floor slab. The sound-insulating floor structure.