JPH011858A - soundproof flooring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a flooring material, and particularly to a soundproofing flooring material that is used in the upper floors of a house to prevent solid sound from propagating to the lower floors due to impact from the floor. .

<Prior art> This type of soundproof flooring material includes, for example, a soft, high foaming layer with a foaming ratio of 3 to 10 times on the back side of the flooring body and a soft, low foaming layer with a foaming ratio of 1.5 to 3x, which is embossed. (No. 50-49917) in which the layers are sequentially formed into layers, or in which a sound insulating foam consisting of multiple layers is adhered to the entire lower surface of the wooden board, and the sound insulating foam in the adjacent layer is A structure having different foaming ratios has been proposed (Utility Model Application Publication No. 47339/1983). In these soundproof flooring materials, foam is used as the TAWR material, and since the foam is compressed or deformed by impact, the collision time becomes longer during the deformation.
Even if the change in momentum, that is, the impulse and the time-resolved value of the impact force, are constant, the peak value of the impact force and the fJi impact natural frequency are lowered, and the impact input energy to the board is reduced, thereby reducing the noise caused by the impact. It is possible to reduce vibrations and vibrations. Furthermore, when a cushioning material such as a foam is bonded to the back surface of a flooring material, impact energy is absorbed by the expansion and contraction of the cushioning material caused by bending vibration of the flooring material, thereby providing a cushioning effect.

<Problems to be Solved by the Invention> In order to provide a sufficient soundproofing effect with these conventional soundproof flooring materials, it is necessary to appropriately set the thickness ratio between the flooring material and the cushioning material. It is used as a material with a thickness of 2 to 3 fΔ. However, when the thickness of the cushioning material is set in this way, the flooring material itself becomes deflected to a large extent, and the real portion of the flooring material may be damaged or the real portion may become uneven. In addition, since the cushioning material is too soft, walking speed when walking on the floor deteriorates, and furthermore, when heavy objects such as pianos, refrigerators, and furniture are placed on the flooring and concentrated loads are applied to the flooring, the Km The material will be compressed and its cushioning effect will be significantly reduced. Furthermore, when such large loads are applied to each other over a long period of time, the restoring force of the cushioning material itself is weak, causing the floor surface to become wavy and causing unevenness at the butt points with adjacent flooring materials. There was a problem.

Means for Solving the Problems> Therefore, the present invention solves the above problems in the prior art and provides a new soundproof flooring material that has a soundproofing effect, has a good walking feel, and does not cause any practical inconvenience. It was invented for the purpose of providing a floor material substrate, and a plurality of consecutive hollow convex portions are formed on both the front and back surfaces of the floor material substrate, each being adhered to the back surface of the floor material substrate, and each of the hollow convex portions is independent from the other within the hollow convex portions. A sheet-like M (consisting of an R material, a damping sheet glued to the back surface of the sheet-like cushioning material, and an elastic sheet glued to the back surface of the damping sheet The soundproof flooring material is characterized in that the positions of the hollow convex portions on the front and back surfaces of the sheet-like cushioning material are preferably different from each other on the front and back surfaces.

<Specific description and operation of the invention> As the floor material substrate, plywood, fiberboard, particle board,
Any plate-like material such as sawn wood can be used.

If necessary, optional decorations such as printing a pattern, pasting a veneer, pasting a synthetic resin or synthetic resin foam decorative sheet, pasting decorative paper, synthetic resin-impregnated decorative paper, or decorative synthetic paper can be applied to the surface of the substrate. can.

Actual processing such as interlocking processing and actual processing is performed on the end portion of the board.

A sheet-like cushioning material having a plurality of protrusions formed on each of the front and back surfaces is attached to the back surface of the substrate via an adhesive.
? F-layer. If necessary, the sheet-like t-J[r material may be bonded to the substrate with a nonwoven fabric interposed therebetween.

The sheet-like M cushioning material is formed of a sheet-like material such as a rubber-based material, a synthetic resin-based material, an asphalt-based material, or the like.

For example, it consists of a ring-opening polymerized monomer (norbornene monomer) consisting of ethylene and cyclopentanediene.

The hardness of the material of the cushioning material is preferably about 30 to 65 degrees. If it is less than 30 degrees, it will likely sink when installed as a floor due to the load of heavy objects such as pianos, refrigerators, and furniture shades, and if it is rigid and exceeds 65 degrees, it will be susceptible to impact forces. This is because energy absorption is not sufficient and the soundproofing effect is reduced.

In the present invention, a plurality of convex portions formed on both the front and back surfaces of the cushioning material have a hollow cylindrical cross section, and these convex portions are formed continuously. In other words, the cross section of the continuous convex portion of the fl'r material has a cell shape or a honeycomb shape.

Therefore, an independent closed space is formed within each convex portion. Each convex part may have any shape in cross section, for example, each convex part may be hexagonal in cross section and these may be continuous to form a honeycomb, or each may be rectangular and continuous in a lattice shape. It may be in the form of a shape or a block shape.

By forming a plurality of convex portions on both the front and back surfaces of the FI street material in this way, an excellent soundproofing effect can be obtained, and the reason is believed to be as follows. The mechanism by which solid sound acting on flooring materials is sensed by people downstairs is that the sound is transmitted from the source to the flooring materials as solid vibrations, propagates through the flooring materials as vibrations, and finally emits sound into the air. It is radiated as vibration or directly transmitted to the human body as vibration, and is sensed by the human hearing.In order to prevent solid sound in this propagation system, it is necessary to absorb tJi'Wr, that is, impact energy, and It is necessary to think of two elements: vibration damping, that is, absorption of vibration energy.

First, considering cushioning, the impact energy applied to the floor surface (floor material substrate) is propagated from the convex part on the front side of the sheet-like cushioning material bonded to the back side to the convex part on the back side. , the contact area with the substrate is small, and therefore the amount of expansion/contraction deformation per unit area is large, so the sheet-like tlA
The buffering effect is improved compared to the case where the R material is bonded to the entire surface of the substrate without providing a convex portion. In addition, when impact energy is applied due to the provision of the convex portions, flexure occurs between the convex portions, resulting in a larger amount of deformation.
The viscoelasticity of the 7m material itself is effectively exhibited. Furthermore, since the amount of deformation of the sheet-like MfE material is increased in this way, the impact time becomes correspondingly longer, thereby making it possible to reduce the impact energy. Thus, according to the configuration of the present invention, a significant buffering effect can be obtained.

Next, damping is achieved by converting the applied vibration energy into intermolecular friction energy while propagating through the material, in other words, into thermal energy and attenuating it. Since the convex portions are formed on both the front and back sides of the holder, the propagation distance of vibrational energy becomes longer, and the conversion into thermal energy can be performed more efficiently.

In particular, if the convex portions on the front side and the convex portions on the back side of the sheet-like cushioning material are formed at different positions, the deflection between the convex portions formed at different positions on the front and back surfaces becomes larger, and impact energy is absorbed. In addition to absorbing more effectively,
Since the vibration energy propagates through a zigzag path and the propagation distance becomes longer, the vibration damping effect can also be further improved.

In addition to these effects, in the present invention, the convex portions of the sheet-like cushioning material are continuously formed in a hollow cylindrical shape or a rectangular cylindrical shape, and the space inside each convex portion is connected to the upper layer substrate and the lower layer vibration damping material. Since the seats are closed off to form independent closed spaces, the closed spaces act as sound absorption chambers and at the same time serve as air cushions, further enhancing the soundproofing effect. Furthermore, depending on the arrangement of the protrusions, independent closed spaces are similarly formed between adjacent protrusions, which function as sound-absorbing chambers and air cushions.

Furthermore, in the present invention, one layer of a damping sheet and an elastic sheet are further bonded to the back surface of the sheet-like cushioning material, and the sheet-like cushioning material is adhered to the floor base through these sheet materials. There is. As these damping sheets and elastic sheets themselves, known ones can be used. The vibration damping sheet is
Generally, the main components are synthetic rubber and synthetic resin, such as ethylene propylene rubber (EPDM), with a rubber hardness of about 60 to 80 degrees, and heavy substances such as iron powder and iron oxide powder are mixed. A sheet having a mass of 1 to 1, 2 or more and having improved sound insulation properties is sometimes called a sound insulation sheet. Such a damping sheet absorbs vibration energy to enhance sound insulation and provides tensile strength to resist bending of the entire composite flooring.

In addition, the elastic sheet is, for example, a polyolefin foam with a foaming ratio of 3 to 30 times, which acts as a second cushioning material to absorb vibration energy, prevent and absorb the occurrence of unevenness, and use its elasticity to provide a comfortable walking experience. It creates the effect of a hat that gives a sense of feeling.

In addition, these sheet materials can be used as sheet cushioning materials and concrete.
Adhesiveness can be improved by interposing it between a floor substrate such as 1.

<Example> FIGS. 1 and 2 show a preferred example of the soundproof flooring material according to the present invention. In the figure, reference numeral 1 denotes a flooring substrate made of a plate-like material such as plywood, fiberboard, particle board, etc. Although not shown, the surface thereof may be optionally decorated.

A sheet-like cushioning material 3 is adhered to the entire back surface of the substrate 1 with a nonwoven fabric 2 interposed therebetween.

In the illustrated embodiment in which a plurality of convex portions 4 are formed on both the front and back surfaces of the seal L-shaped cushioning material 3, the formation positions of the convex portions 4 do not match on the front and back surfaces of the cushioning material 3 and are displaced. That is, the convex portions 4a on the front side and the convex portions 4b on the back side are not formed linearly in the cross section of the cushioning material, but are displaced in a zigzag shape. Further, each of the convex portions 4 has a hollow regular hexagonal shape as shown in FIG. 2, and a plurality of convex portions 4 are continuously formed with their sides touching. The cushioning material 3 in the floor material shown as a sectional view in FIG. 1 is understood to correspond to the cross section taken along the line X-X in FIG. Cushioning material 3
is joined to the upper layer substrate 1 and the lower layer damping sheet 5 via the convex portions 4a and 4b on the front and back surfaces, and a closed space 8 serving as a sound absorption chamber is formed inside the convex portion 4 between them. Each is formed independently.

The shapes of the convex portions 4a and 4b formed on the front and back surfaces of the cushioning material 3 are not necessarily limited to regular hexagons, and may have various shapes as illustrated in FIG. 3. In particular, if the arrangement is as shown in Figure 3 (C) to (E), an independent closed space is formed not only inside each convex part but also between adjacent convex parts, which further improves the sound absorption effect. can be done.

A damping sheet 5 is bonded to the back surface of the sheet-like M street material 3 via the lower surface of the convex portion 4b, and elastic sheets 6 are bonded to the entire back surface of the damping sheet 5.

Floor material 10 of the present invention comprising a substrate 1, a sheet-like cushioning material 3, a damping sheet 5, an elastic sheet 6, and a nonwoven fabric 2 disposed between these substrates and the sheet 1-shaped cherry blossom street material as necessary. is constructed on the subfloor 7 and used as a soundproof flooring material.

In order to confirm the soundproofing effect of the flooring material of the present invention, a test was conducted in the following manner.

Various test specimens of the same size were placed on a 18183131 x 2727y, 150u thick concrete I floorboard, and a light impact test with a tapping machine and a heavy impact test with a bang machine were performed using the center of the top surface of the specimen as the impact point. Tested. As a test specimen, (A) Norbornene monomer (tensile strength 7 kg/cm2 (at room temperature), which is a ring-opening polymerization monomer consisting of ethylene and cyclopentanediene) was placed on the back side of the base material of a 6U thick precious wood veneer laminated board. , 10
% Compressive strength 1,2 kg7cm2. Rubber hardness 53
A sheet-like cushioning material in which a regular hexagonal hollow convex part with a height of 2.5U is formed in a honeycomb shape as shown in Fig. '5R with a hardness of 70 degrees and a thickness of 1 um as a vibration damping sheet
-1130" (Saitama Rubber Industries Co., Ltd.), and furthermore, on the entire back side, an elastic sheet with a 10% compressive strength of 1
, 2 kg7cm2, tensile strength at room temperature is 7.0
kg/cx' and thickness 2xx "Lion Board F"
(B) Two layers of polyolefin resin foam with foaming ratios of 10x and 2x on the back side of the base material of the same precious wood veneer laminated board. A 4.5n thick adhesive lamination was prepared.

The test results for these two types of specimens are as shown in the graph of FIG. In this graph, the results of the light impact test for specimen (A) are the results of the 0-O1 heavy impact test.
−・, and the result of the light impact test of specimen (B) is Δ
... Δ, and the results of the heavy impact test are shown in mm. As is clear from this graph, the test specimen (A), which is the material of the present invention, satisfies the level of L-55 in all frequency ranges with respect to impact noise caused not only by heavy impact but also by light impact. , test specimen (B
) remains at a much lower level than this, and in particular, the results of a light impact test close to the WIv sound that frequently occurs in everyday life are even lower than the level of L-60. Therefore, it was confirmed from the test results that the flooring material of the present invention exhibits an extremely significant soundproofing effect.

<Effects of the Invention> According to the present invention, a flooring material with extremely excellent soundproofing effects can be obtained,
Moreover, this flooring material has a simple structure and can be manufactured at low cost using conventionally commercially available materials. Furthermore, the sheet-like Mftfr material used in the flooring material of the present invention has appropriate hardness and is further bonded with an elastic sheet as the bottom layer, so it has excellent walking comfort when used as a flooring material.

[Brief Description of the Drawings] Fig. 1 is a sectional view showing the structure of a soundproof flooring material according to an embodiment of the present invention, and Fig. 2 is a sheet-like structure used for the flooring material shown in Fig. 1).
Plan view showing JIFr material, No. 312J is sheet-shaped] 11
FIG. 4 is an explanatory diagram showing a slight modification of the shape and arrangement of the convex portions in the jY material, and FIG. 4 is a graph showing the soundproofing effect of the flooring material according to the present invention in comparison with a conventional flooring material. Explanation of marks 1...Substrate 2...Nonwoven fabric 3...Sheet cushioning material L4a, 4b...Protrusions 5...Vibration damping sheet 6...
・Elastic G I~ 7.・Floor base 8・Soundproof room 10・
...Flooring patent applicant Noda Plywood Co., Ltd. agent Patent attorney Fumi Kuwabara Doma Doma Take 1) Yoshibeya 1 Inran 2nd time 3rd prisoner (8) (B) (C'l (D) (E) % 4 Cause Off 7-7゛Condolences + Singing Mass Committee k (Mountain) Procedural Amendment July 24, 1988 1, Indication of Case 1988 Patent Application No. 153632 4, Agent 〒102 Address 3-11-5 Iidabashi, Chiyoda-ku, Tokyo
No. 6, Subject of amendment “Detailed description of the invention” in the specification
Column and drawing 7, content of amendments As shown in the attached sheet (attached sheet) 1. The description in lines 10 to 12 of page 5 of Kiryu in the “Detailed Description of the Invention” of the specification of the present application has been changed from, for example, ethylene and cyclopentanediene. A polymer obtained by ring-opening polymerization of norbornene monomers is used. Correct it as j. 2. On page 12, lines 16 to 18, “Ethylene and...
The description "Norbornene monomer" is corrected to "Polymer J obtained by ring-opening polymerization of norbornene monomer consisting of ethylene and cyclopentanediene." 3. Figure 2 of the drawings attached to this application is corrected as shown in the attached sheet.

Claims (2)

[Claims] (1) A sheet consisting of a flooring substrate and a plurality of consecutive hollow convex portions formed on both the front and back surfaces of the flooring substrate, each of which is adhered to the back surface of the flooring substrate, and an independent closed space is formed within each of the hollow convex portions. 1. A soundproof flooring material comprising a cushioning material in the form of a sheet, a damping sheet bonded to the back surface of the damping sheet, and an elastic sheet bonded to the back surface of the damping sheet. (2) The soundproof flooring material according to claim 1, wherein the hollow convex portions are formed in different positions on both the front and back surfaces of the sheet-like cushioning material.