JPH01137064A - Floor finishing material - Google Patents

Abstract

PURPOSE: To cut off the impulsive sound of a lightweight floor by forming a vibration damping/sound isolating layer on the back face of a surface finishing material made of a hard wood material, and forming buffer layers with irregular faces on the upper and lower faces on the back of a support plate made of veneer plywood and fitted to the back face. CONSTITUTION: A vibration damping/sound isolating layer 2 is formed on the back face of a surface finishing material 1 made of a relatively hard wood or synthetic resin material, a support plate 3 made of veneer plywood is fitted to its back face, and a buffer layer 4 is formed on its back face. The vibration damping/sound isolating layer 2 is made of a viscoelastic body such as a plastic or rubber blended with an inorganic filler, and the buffer layer 4 formed with an irregular face on the lower face is made of an elastic foam body. Lugs 4A are kept in contact with the underground face 10 of a concrete slab, the lugs 4A are first collapsed before the buffer layer 4 is collapsed, and deformation is reduced when the underground face 10 reaches recesses 4B. The static spring constant of the buffer layer 4 can be reduced due to a shape effect.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a floor finishing material as a building interior material.

[Conventional technology]

Carpet has traditionally been the mainstream floor covering material for apartment complexes. However, recently, wood-based floor finishing materials have begun to be reconsidered due to complaints about hygiene, such as carpets being prone to dust mites, and the lack of a natural feel. However, when this wood-based finishing material is used as a floor finishing material for condominiums, it has a major drawback of poor floor impact sound insulation properties. In other words, floor impact sounds (light floor impact sounds) such as footsteps and the sound of objects being dropped from upstairs are transmitted downstairs,
There were noise complaints. Therefore, a method was developed in which a foamed plastic was pasted on the back side of the wooden floor finishing material in an attempt to deal with lightweight floor impact noise, but its sound insulation performance did not meet the required level (L-55 for lightweight impact sources). It was something. In order to satisfy this required level, it was necessary to make the foamed plastic layer applied to the back side of the finishing material about 6 to 15 mm thick. A finishing material provided with such a foamed buffer layer of about 6 to 15 m has the disadvantage that the floor surface becomes soft and easily dented, causing floor noise. As a typical conventional wood-based floor finishing material, the wood layer 101 is 71 m thick, the buffer layer 102 is 8 fi, and the total thickness is 15 m.As a result of measuring the floor impact sound blocking performance, it was found that The grade was L-65. The density of the flooring (concrete slab) is 2.3t/rr.
Measured using a plate with a thickness of 150 mm.

Therefore, the present inventor previously developed a floor finishing material as shown in FIG. 15. A damping/sound insulating layer 101 is formed on the back side of a surface finish material 100 made of a relatively hard material such as wood or synthetic resin, and a support such as veneer plywood is formed on the back side of this damping/sound insulating layer 101. Attach the plate 102, and this support plate 10
A buffer layer 103 is formed on the back surface of 2.

[Problem to be solved]

The buffer layer 103 in the floor finishing material shown in Fig. 15 uses a sheet-like elastic material with smooth upper and lower surfaces. It was not possible to reduce the target spring constant to less than 15 kg/cm-cr1. On the other hand, in order to improve the lightweight impact sound isolation characteristics, it is necessary to further lower the spring constant of the buffer layer 103, and as long as the sheet-shaped buffer layer 103 with the shape shown in FIG. 15 is used, the sound insulation grade is L- It was not possible to achieve excellent performance of 60 or higher.

Therefore, this invention improves floor impact sound insulation, prevents the floor surface from becoming soft and prone to denting, prevents floor noise, minimizes the overall thickness, and achieves a sound insulation grade of L-60 or higher. The purpose is to provide floor finishing materials with excellent performance.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention forms a vibration damping/sound insulating layer on the back side of a surface finishing material made of a relatively hard material such as wood or synthetic resin. A support plate such as veneer plywood is attached to the support plate, and a buffer layer is formed on the back surface of this support plate, the upper and/or lower surfaces of which are not smooth but have an uneven surface.

[Effect]

The present invention exhibited excellent blocking performance against floor impact noise, and no local dents or floor noise occurred even when walking on this floor covering material.

〔Example〕

Some preferred embodiments of the present invention will be described below with reference to the drawings.

In a first embodiment of the present invention shown in FIG. 1, a vibration damping/sound insulating layer 2 is formed on the back surface of a surface finishing material 1 made of a relatively hard material such as wood or synthetic resin. A support plate 3 made of veneer plywood or the like is attached to the back surface of this vibration damping/sound insulating layer 2, and a buffer layer 4 is formed on the back surface of this support plate 3. Surface finishing material 1
Although not shown, it is possible to use a material made by laminating a wood-finished veneer and a base plywood. Moreover, the thickness of the surface finishing material 1 is 6 fi or less, and more preferably about 1 to 51 m. The vibration damping/sound insulating layer 2 is made of a plastic or rubber viscoelastic material mixed with an inorganic filler, or a plastic or rubber viscoelastic material mixed with asphalt, and the thickness of the vibration damping/sound insulating layer 2 is is preferably about 1 to 4H.

The buffer layer 4 is formed of a resilient foam or fibrous material, porous fiberboard, rubber-like elastic material, etc., and its lower surface is not a smooth surface but an uneven surface. The convex portion 4A of the buffer layer 4 contacts the base surface 10 such as a concrete slab. Buffer N
The height l of the convex portion 4A of No. 4 is preferably about 1 to 5 fi. Due to the presence of such convex portions 4A, when the buffer layer 4 is crushed due to the weight applied to the floor finishing material, the convex portions 4A are crushed first (
(contributes to a low spring constant), and when it deforms until it reaches the concave portion 4B, the spring characteristics suddenly rise, so that there are fewer ways to deform. After the convex part 4A is crushed, the spring constant (15 kg/cxa-aa
). Further, it is desirable that the area of the convex portion 4A of the buffer layer 4 is 172 or less of the total area. In other words, it is desirable that at least half of the entire area of the lower surface of the buffer layer 4 in FIG. 1 be formed by the recess 4B. Further, the overall thickness of the buffer layer 4 is formed to be about 2 to 10 fl. The static spring constant of the buffer layer 4 is desirably 5 kg/cIII-d or less at least in the range of 0 to 3 degrees of deformation with respect to local loads ioo, :fi. In the first embodiment shown in FIG. 1, the support plate 3 has a thickness of 2 cm or more, is divided into a plurality of pieces of 200 cd or less, and is made of metal or plastic linear material (wire, etc.) 5. Connect the support plates 3.3 divided by . By using such a linear material 5, the gap between the support plates 3, 3 can be made constant, linearity can be achieved, and productivity can be improved.

In the second embodiment shown in FIG. 2, the uneven surface of the buffer layer 4 was formed on the upper surface. A convex portion 4A formed on the upper surface of the buffer layer 4 contacts the support plate 3. The lower surface of the buffer layer 4 is formed into a smooth surface and comes into contact with the underlying surface 10. The rest of the configuration is the same as that of the first embodiment, so a description thereof will be omitted. Note that this second
There is no problem even if the wire material 5 is used in the embodiment.

The embodiments shown in FIGS. 3 to 11 show various variations of the buffer layer 4. In Fig. 3, the convex portion 4
An example is shown in which the convex portions 4A are arranged in a dotted manner, and FIG. 4 shows an example in which the convex portions 4A are arranged in a linear manner. FIG. 5 shows an example of dotted arrangement in which the convex portions 4A are formed in a circular shape. In Fig. 6, the convex portion 4
An example in which A is arranged in a grid is shown. In FIG. 7, the vertical cross-sectional shape of the convex portion 4A is formed into a semicircular shape, and the convex portions 4A are arranged linearly. FIG. 8 shows an example in which the convex portions 4A are formed in a hemispherical shape and arranged in a dotted manner. In the embodiment shown in FIG. 9, the convex portion 4A
Fig. 10 shows an example in which the vertical cross section of the protrusion 4A is triangular and is arranged in a linear manner. Fig. 10 shows an example in which the protrusions 4A are arranged in a dotted manner in the form of a pyramid. FIG. 11 shows an example in which both the upper and lower surfaces of the buffer N4 are formed into uneven surfaces.

The third embodiment shown in FIG. 12 shows an embodiment in which not only the support plate 3 is divided into a plurality of parts, but also the vibration damping/sound insulating layer 2 and the buffer layer 4 are divided into a plurality of parts.

The graph shown in FIG. 13 is the result of an experiment on the static spring characteristics of the buffer layer 4. The graph shown by symbol A is the one using the buffer layer 4 shown in FIG. 3, and the graph shown by symbol B is the one using the buffer layer 4 shown in FIG. This shows one using a sheet-like buffer layer with a smooth bottom surface. The buffer layers indicated by symbols A and B were made of resin-based elastic foam.

FIG. 14 shows the lightweight impact sound insulation performance of the floor finishing material shown in the first embodiment and the floor finishing material in which the buffer layer 4 of the floor finishing material shown in the first embodiment is replaced with a buffer layer without uneven surfaces. This is a comparison in terms of. Reference numeral A° indicates a product according to the present invention, and reference numeral B' indicates a floor finishing material having a sheet-like buffer layer.

〔effect〕

As explained above, according to the present invention, a vibration damping/sound insulating layer is formed on the back surface of a surface finishing material made of a relatively hard material such as wood or synthetic resin, and the back surface of the vibration damping/sound insulating layer is A support plate such as veneer plywood was attached to the back of the support plate, and a buffer layer was formed on the back of this support plate, with the upper and/or lower surfaces not being smooth but uneven, so that when a load was applied to the floor, the buffer layer When the convex part collapses first and the buffer layer deforms until it reaches the concave part, the spring characteristics suddenly rise, so that the number of deformations is reduced. That is, if the height of the convex portion is determined by taking into consideration the amount of depression that does not pose a problem for living on the floor, the floor impact sound insulation performance can be improved without causing any hindrance to daily life. By providing the convex portion on the upper surface, the lower surface, or both surfaces of the buffer layer, the convex portion comes into contact with the underlying surface or the support plate,
It is possible to reduce the transmission path of lightweight impact sound and lower the static spring constant of the buffer layer due to the shape effect, which is effective in blocking lightweight floor impact noise. Also, the static spring constant is 1
L for those using a buffer layer of 5 kg/cs+-1 or more
-60 or higher, if the buffer layer is 5 kg/as·cm2 or lower, the floor impact sound insulation performance is improved by one rank or more, and it can be lowered to L-55 or lower.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the invention, FIG. 2 is a perspective view showing a second embodiment, FIGS. 3 to 11 are perspective views showing various variations of the buffer layer, and FIG. is the third
A perspective view showing an example, FIG. 13 is a graph showing the static spring characteristics of the buffer layer, FIG. 14 is a graph showing lightweight impact sound insulation performance, and FIG. 15 is a floor finishing material developed earlier by the present inventor. FIG. DESCRIPTION OF SYMBOLS 1... Surface finishing material, 2... Vibration damping/sound insulation layer, 3... Support plate, 4... Buffer layer, 4A... Convex part, 4B... Concave part.

Claims (1)

[Scope of Claims] 1. A floor finishing material to be laid on a floor subsurface, which is made of wood,
A vibration damping/sound insulating layer is formed on the back side of a surface finishing material made of a relatively hard material such as synthetic resin, and a support plate such as veneer plywood is attached to the back side of this vibration damping/sound insulating layer. A floor finishing material characterized in that a buffer layer is formed on the upper surface and/or lower surface of the material, the upper surface and/or the lower surface of which is not a smooth surface but an uneven surface. 2. The floor finishing material according to claim 1, characterized in that the area ratio of the convex surfaces of the buffer layer is 1/2 or less. 3. The floor finishing material according to claim 1 or 2, wherein the height of the convex portion of the buffer layer is 1 to 5 mm. 4. The static spring constant of the above buffer layer is local load 100cm^
2, at least 5k when the amount of deformation is in the range of 0 to 3mm
The floor finishing material according to any one of claims 1 to 3, characterized in that it has a g/cm·cm^2 or less. 5. The floor finish according to any one of claims 1 to 4, characterized in that the support plate has a thickness of 2 mm or more and is divided into a plurality of pieces having a size of 200 cm or less. Material.