JPH0633585A - Soundproof floor material - Google Patents

Abstract

PURPOSE:To provide compression resistance and shock absorbing property so as to reduce floor impulsive sound extending over the whole frequency region. CONSTITUTION:This soundproof floor material is formed so that slits 5 are provided on one face of a plywood layer 2 composed of a decorative plywood 3 and a base material plywood 4, and a cushioning sheet 6 is stuck on the face having the slits 5. The inner face side 17 of the cushioning sheet 6 is constituted of recessed parts 7 and bonding parts 10 contacting with the plywood layer 2, meanwhile the outer face side 21 is provided with protruded parts 8 contacting with a bed face, and the inner face side 17 and the outer face side 21 are provided with air passages 9 for communication of air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof flooring material having vibration-proofing and sound-proofing functions for apartment houses, hotels and the like.

[0002]

2. Description of the Related Art Today, impact vibrations from the upper floors of apartments, such as footsteps of people directly stimulating the floor, vibrate or impact solids such as floor materials and bend them. Waves are said to propagate through solids and release in rooms downstairs. In order to improve such impact vibration noise, there is a method of reducing the impact force applied to the floor with a soft finishing material, or a method of increasing the bending rigidity and mass of the floor to make the floor structure less likely to vibrate. The former method is effective for light impact sound, for example, there is a method of laying a carpet or a cushion sheet on a concrete base material, and the latter method is effective for heavy impact sound, for example, concrete. The thickness of the slab is being studied.

However, today, heavy impact sound is influenced by the structure of the building structure, such as the thickness of the concrete slab, regardless of the type of floor material, so many improvements have been made to the lightweight impact sound, and various floor materials have been developed. Has been done. For example, Japanese Patent Publication Sho 5
The soundproofing floor material disclosed in Japanese Patent Laid-Open No. 6-23509 has a three-layer structure of an elastic molded plate, a floor base material, and a floor finish material, and the individual divided floor base materials are laid without making contact with each other. The pieces are acoustically independent. As a floor material having a four-layer structure, for example, a finishing material having a through hole or a semi-through slit provided on a cushioning material, a flexible thin plate, and a wooden floor decorative board are sequentially laminated. -15647
It is disclosed in Japanese Patent Publication No.

On the other hand, today, attempts are being made to improve the layer structure of flooring materials and the materials constituting them. Among them, as the cushioning material, an inorganic fiber board such as glass wool or rock wool, or an organic foam such as polyethylene, ethylene-vinyl acetate copolymer, polyurethane or polyethylene is used. However, the smaller the hardness of the cushioning material is, the more effective it is to prevent floor impact noise, but on the other hand, when a load is applied from the floor, the compressive deformation becomes large, and in some cases, it cannot be actually used. A thickness of at least 10 mm is required to maintain compression resistance and shock absorption.

[0005]

However, although the soundproofing flooring material using the decorative plywood has some sound insulation effect, it is desired that it exhibits the sound insulation effect over the entire frequency range, especially in the low frequency range. It is rare. At present, there are no floor materials that satisfy this requirement. On the other hand, the cushioning material required a thickness of at least 10 mm or more in order to satisfy both shock absorption and compression resistance, but this increased the total thickness of the flooring material and restricted the floor height of the building. I was giving. Further, when the thickness of the cushioning material is 10 mm or more, there is also a problem that the cost increases. SUMMARY OF THE INVENTION The present invention has been made to improve such a point, and an object of the present invention is to provide a soundproof flooring material which has a shock resistance as well as a compression resistance and has a reduced floor impact sound level over the entire frequency range.

[0006]

In order to achieve the above object, in the present invention, a slit is provided on one surface of a plywood layer composed of a decorative plywood and a base plywood, and a buffer sheet is attached to the surface having the slit. In the soundproof floor material, the cushioning sheet has a concave portion on the inner surface side and an adhesive portion in contact with the plywood layer, while the outer surface has a raised portion in contact with the base surface, and allows the air existing on the inner surface side and the outer surface side to communicate with each other. It is on a soundproof floor material that forms an air passage. A damping sheet may be interposed between the decorative plywood and the base plywood having slits.

The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a main part of a soundproof flooring material according to the present invention. The soundproofing floor material 1 includes a decorative plywood 3 and a base plywood 4 having slits 5.
And a slit 5 of the base plywood 4
The buffer sheet 6 is sequentially laminated on the surface provided with. In the buffer sheet 6, the recesses 7 are regularly arranged in a grid pattern on the inner surface side 17, and the recesses 7 are provided between the adjacent recesses 7.
Air passage 9 for communicating the air contained in the air with another recess 7
The cushioning property of the cushioning sheet 6 is improved. The cushioning sheet 6 is attached to the base plywood 4, but the adhesive portion 10 is local.

On the other hand, on the outer surface side 21 of the cushioning sheet 6, that is, the surface in contact with the base surface 11, only the flat top 12 of the raised portion 8 is in contact with the base surface 11, and the other regions are in the base surface 11. It has become unsealed from the ground and air is communicating. This state is shown in FIG. In this way, the cushioning sheet 6 is locally joined to the base plywood 4 on the inner surface side, while on the other hand, the cushioning sheet 6 is in contact with the base surface 11 only at the tops 12 of the ridges on the outer surface side. The impulsive sound generated is difficult to be directly transmitted to the base surface 11. Moreover, since the internal air 17 and the external surface 21 of the cushioning sheet 6 are made to communicate with the air present therein, the cushioning property as well as the large amount of the air present absorbs the impact sound. effective. Of course, the buffer sheet 6 is N
Since it is a rubber such as R, SBR, or EPDM, or an elastomer such as urethane, it also has an effect of partially absorbing and damping impact sound.

In the present invention, it is important for the cushioning sheet 6 to have a ground contact area ratio to the base surface 11 or a base material plywood 4, and this ground contact area ratio is the top portion 12 of the ridge contacting the base material or the adhesive. The total area occupied by the parts 10 is divided by the surface area of the base plywood 4. Normally, the maximum ground contact area ratio is 20% on both the outer surface side and the inner surface side of the cushioning sheet 6, and if it exceeds this, the impact sound easily propagates from the base plywood 4 to the base surface 11, resulting in poor soundproofing. In this example, the ground contact area ratio to the base surface and the base material plywood contact area ratio are substantially equal. The thickness of the buffer sheet 6 is 0.2 to 1.5 m
It is about m.

The plywood layer 2 used here has a thickness of 6 to 10
In mm, it is composed of a laminated body of the decorative plywood 3 and the base plywood 4 having the slits 5, or the base plywood 4 having the slits 5. These materials are made of beech, chive, lauan, and the like. Further, it is preferable that the slits 5 provided in the base plywood 4 communicate with each other in order to emit and diffuse the impact sound, and the area occupancy rate is 10 to 60%.

Further, in the soundproof flooring 1, a damping sheet 14 is interposed between the decorative plywood 3 and the base plywood 4 having the slits 5, and the cushioning sheet 6 is provided on the surface of the base plywood 4 having the slits. Are sequentially laminated. The vibration damping sheet 14 is a rubber-based foam, an olefin-based foam, or a urethane-based foam.

On the other hand, in the soundproof flooring 1 shown in FIG. 5, in order to increase the contact area ratio to the base surface and the contact area ratio to the base plywood 4, the areas of the top 12 of the raised portion and the adhesive portion 10 are increased. The size is increased, and at the same time, the foam layer 15 is interposed between the base plywood 4 and the buffer sheet 6.

The foam layer 15 used here is made of polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl methacrylate copolymer (EMMA), or the like. A polyolefin-based copolymer, polyurethane, a foam having closed cells of rubber, or a general-purpose inorganic filler added, and particularly preferably 100 parts by weight of the polymer as an inorganic filler such as aluminum hydroxide or magnesium hydroxide. Or, it has a composition in which 5 to 200 parts by weight of mica is added, or soft polyurethane 10
It is a foam having a composition in which 3 to 30 parts by weight of mica is added to 0 parts by weight and having a crosslinkable closed cell with an expansion ratio of about 5 to 30. The foam layer has a thickness of 2 to 10 mm. A pattern such as grain may be provided on the surface of the foam layer 15. Of course, instead of the foam layer 16, a fiber member such as a non-woven fabric can be used.

6 to 8 show another embodiment, which is different in the cushioning sheet 6 from the soundproof floor material. As shown in FIG. 7, the buffer sheet 6 has, on the inner surface side 17, a recessed portion 7 that is recessed from the reference surface 18 and an adhesive portion 10 that projects from the reference surface 18 and contacts the plywood layer 2.
And the adhesive portions 10 are regularly arranged in a grid pattern. The adhesive portion 10 includes a core portion 19 and a concentric ring portion 20 surrounding the core portion 19. The ring portion 20 adjusts the adhesive force between the cushioning sheet 6 and the base plywood 4 and reinforces the core portion 19. This contributes to improving the cushioning property of the cushioning sheet 6. An air passage 13 is formed between the adhesive portions 10. This allows the air contained in each recess 9 to communicate with the other recesses 9, thereby improving the cushioning property of the cushioning sheet 6.

On the other hand, the outer surface side 21 of the buffer sheet 6, that is, the surface in contact with the base surface 11, is a reference surface 2 as shown in FIG.
The ridges 8 protruding from 2 are regularly arranged in a grid pattern, and the tops of the ridges 8 are in contact with the base surface 11.

[0016]

In the soundproof flooring material 1 of the present invention, the cushioning sheet 6 is locally bonded to the base material plywood 4 on the inner surface side 17, while on the outer surface side 21, only the top 12 of the raised portion is in contact with the base surface. Since the internal air is communicated with the inner and outer surfaces, the impact sound propagating from the base plywood 4 is transmitted to the base surface 1.
It is difficult to directly transmit to 1 and absorbs and attenuates a part of impact sound, and further improves cushioning property and compression resistance.

[0017]

EXAMPLES Next, specific examples of the soundproof flooring material of the present invention will be described in detail. Examples 1 to 4 Decorative plywood with a thickness of 2.5 mm, vibration damping sheet with a thickness of 1.5 mm (natural / SBR rubber foam), base material plywood with a thickness of 5.5 mm (having slits with an occupancy rate of 28%) A 6-ply beech alone) and a 1 mm-thick cushioning rubber sheet were sequentially laminated to obtain a soundproof flooring shown in FIG. The buffer sheet is shown in Table 1.
A sheet having a thickness of 1 mm was prepared by using the rubber composition shown in 1), placed on a lower die provided with hemispherical ridges having a pitch of 2 mm, and then covered with an upper die having substantially the same shape.
It was left to vulcanize at 53 ° C. for 20 minutes. The area of the top of the raised portion of the obtained cushioning sheet was changed, and the contact area ratio of the top was set to 5
-20%.

[0018]

[Table 1]

The impact sound level of the soundproof flooring material was measured in accordance with JIS A-1418 by placing a cushioning rubber sheet so as to face the floor surface of the slab concrete. Also,
The load resistance indicates the amount of bending of the floor material when a load of 4 kg / cm ² is applied to the soundproof floor material. The results of these measurements are shown in Table 2. Further, FIG. 9 shows the relationship between the floor impact sound level and the octave band center frequency.

Example 5 The same decorative plywood, vibration damping sheet, base plywood as in Example 1, a nonwoven fabric made of polyester long fibers having a thickness of 2 mm and a basis weight of 200, and a buffer sheet having a ground contact area ratio of 7% were used. A soundproof flooring material was obtained by sequentially stacking these. Table 2 shows the measurement results of the floor impact sound level and the load bearing capacity of the obtained soundproofing floor material.
FIG. 9 shows the relationship between the floor impact sound level and the octave band center frequency.

Example 6 The same decorative plywood, damping sheet, base plywood as in Example 1 and a polyolefin foam having a thickness of 4 mm and an expansion ratio of 30 were laminated in this order, and a buffer sheet having a ground contact area ratio of 5%. Was attached to obtain a soundproof flooring material. Table 2 shows the measurement results of the floor impact sound level and the load bearing capacity of the obtained soundproofing floor material.

Example 7 The same decorative plywood as that of Example 1, a damping sheet, a base plywood, and a cushioning rubber sheet having a thickness of 1 mm were sequentially laminated to obtain a soundproof flooring shown in FIG. As the cushioning sheet, a sheet having a thickness of 1 mm was prepared by using the rubber composition shown in Table 1, and then the sheet was placed in a lower mold having a hemispherical ridge, and then an upper mold having substantially the same shape was covered. The mold was left at 153 ° C. for 10 minutes for vulcanization. The obtained cushioning sheet has the same pattern as that shown in FIGS. 7 and 8 and has a contact area ratio of 7 at the top of the ridge.
% Installed. Table 2 shows the measurement results of the floor impact sound level and load resistance of this floor material.

Comparative Example 1 A soundproof flooring material was obtained by laminating the same decorative plywood, damping sheet, base plywood as in Example 1 and a cushioning sheet having a thickness of 1 mm and a contact area ratio of 60%. The measurement results of the floor impact sound level and load bearing capacity of this floor material are shown in Table 2, and FIG. 9 shows the relationship between the floor impact sound level and the octave band center frequency.

COMPARATIVE EXAMPLE 2 The same decorative plywood, damping sheet, base plywood as in Example 1 and a nonwoven fabric made of polyester filaments having a thickness of 2 mm and a basis weight of 200 were used, and these were sequentially laminated to produce soundproofing. Table 2 shows the measurement results of the floor impact sound level and load resistance of this floor material, and FIG. 9 shows the relationship between the floor impact sound level and the octave band center frequency.

COMPARATIVE EXAMPLE 3 The same decorative plywood, damping sheet, base plywood as in Example 1 and a polyolefin foam having a thickness of 4 mm and a foaming ratio of 30 were used, and these were sequentially laminated to produce a soundproof floor. Table 2 shows the measurement results of the floor impact sound level and load resistance of this floor material.

[0026]

[Table 2]

As described above, in this embodiment, by setting the contact area ratio of the cushioning sheet to the lower ground to 5 to 10%, the L value becomes 50 or less, and it is understood that the soundproofing property is excellent.
In addition, even if the contact area is 20%,
The value is small. However, when the ground contact area ratio of the base surface exceeds 20%, the L value increases at low frequencies and high frequencies,
In particular, the L value rises to 64 at 60%.

[0028]

As described above, in the soundproof flooring material of the present invention,
In particular, since the cushioning sheet locally contacts the base plywood and the base on the inner and outer surfaces and allows the air existing on the inner and outer surfaces to communicate with each other, the impact sound from the base plywood is easy. In addition, it is less likely to propagate to the base surface, and the impact sound is partly absorbed and attenuated, so that the soundproofing effect is improved, and further, the air flowability is excellent, and the cushioning property and load resistance are also excellent. In particular, a soundproof flooring material having a maximum contact area ratio of the cushioning sheet to the lower ground of 20%, preferably 5 to 10%, is excellent in soundproofing.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a soundproof flooring according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing a state in which the soundproof flooring material shown in FIG. 2 is laid on a base surface.

FIG. 4 is a partial plan view seen from the inner surface side of the cushioning sheet.

5 is a cross-sectional view of a soundproof flooring material which is another embodiment of the present invention and corresponds to FIG.

FIG. 6 is a cross-sectional view of a soundproof flooring material which is still another embodiment and corresponds to FIG. 2.

FIG. 7 is a plan view of the cushioning sheet used for the soundproof flooring of FIG. 6 seen from the inner surface side.

FIG. 8 is a plan view of the cushioning sheet used for the soundproof flooring of FIG. 6 viewed from the outer surface side.

FIG. 9 is a graph showing the relationship between the floor impact sound level of a soundproof flooring material and the octave band center frequency.

[Explanation of symbols]

 1 Soundproof Flooring Material 2 Plywood Layer 3 Decorative Plywood 4 Base Material Plywood 5 Slits 6 Buffer Sheet 7 Recesses 8 Recesses 9 Protrusion 9 Air Passage 10 Adhesives 12 Top 17 Inner Side 21 Outer Side

Claims (4)

[Claims] 1. A soundproof flooring comprising a plywood layer composed of a decorative plywood and a base plywood having slits on one side, and a cushioning sheet attached to the surface having the slits, wherein the cushioning sheet has a concave portion on the inner surface side and the plywood sheet. It consists of an adhesive part that contacts the layer,
On the other hand, a soundproof flooring material, characterized in that the outer surface side has a raised portion in contact with the base surface, and an air passage for communicating air is formed on the inner surface side and the outer surface side. 2. The soundproof flooring material according to claim 1, wherein a damping sheet is interposed between the decorative plywood and the base plywood. 3. The soundproof flooring material according to claim 2, wherein a foam layer or a nonwoven fabric is interposed between the base plywood and the cushioning sheet. 4. The soundproof flooring material according to claim 1, wherein both the contact area ratio of the cushioning sheet to the lower ground and the contact area ratio to the base plywood are 20% at maximum.