JPH076330Y2 - Wood composite soundproof flooring - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a wooden composite soundproof floor material that reduces the propagation of floor impact sound downstairs in an apartment house, etc., and is bonded to a floor base such as a concrete floor slab. A wood composite soundproof flooring material that is directly pasted with an agent, etc. and is used to prevent walking noise and other noises (lightweight floor impact sound) from propagating to the next room or downstairs through this floor slab. It is about.

<Prior art> In order to improve the soundproofing performance of the wooden flooring materials used in apartment houses and to reduce the above-mentioned lightweight floor impact noise, the back surface of the wooden flooring materials such as synthetic resin or rubber foam is used. A cushioning material is generally attached, and various studies have been made on the hardness, thickness, shape, etc. of the material for the purpose of improving its performance, and many proposals have been made.

For example, in Japanese Utility Model Laid-Open No. 64-33846, a rubber or synthetic resin sheet having an area in contact with a floor slab of less than 40% and a hardness of less than 40 degrees by a C-type hardness meter specified in JIS K 6301 is used as the cushioning material. It is shown that the sound insulation performance of sound insulation grade L-55 can be obtained by using

<Problems to be solved by the invention> By the way, there is a case where it is desired to further improve the soundproofing performance of the flooring material, for example, to provide a sound insulation grade of L-50 or more. In order to obtain such a high sound insulation grade, methods such as making the material of the cushioning material softer or changing the shape of the cushioning material to reduce the contact area with the floor base are usually considered. .

However, in the method of softening the material of the cushioning material,
When this is used as a floor material, the floor surface becomes too soft, which causes a problem in practical performance such that walking feeling is deteriorated or local deformation due to a load is increased.

On the other hand, in the case of reducing the contact area as described above, the method of providing a large number of independent convex portions on the cushioning material allows the air layer formed between the cushioning material and the floor base to be continuous, resulting in higher soundproofing performance. Therefore, it is advantageous for the soundproof effect.

However, if the protrusions are provided independently like this,
Since the wooden board and the floor base are not connected between these convex parts and become a space part, a large local deformation occurs when a load is applied to the peripheral part of the floor material, and in some cases the peripheral part Problems such as cracks in the corners of parts occur.

In addition, in order to fit adjacent floor materials to each other, it is common practice to perform actual processing on the peripheral portion of this type of floor material, but when the thickness of the wood board becomes thin, the actual wood board becomes extremely difficult. As a floor material, it becomes thin and therefore easily broken, which poses a practical problem as a floor material.

The present invention solves such problems, and has excellent soundproofing performance, in particular, excellent performance of light-weight floor impact sound with a sound insulation grade of L-50 or more, and a constant strength and a proper level as a suitable floor material for a house. It is an object of the present invention to provide a wood-based composite soundproof floor material that can satisfy the cushioning property at the same time.

<Means for Solving the Problems> As a result of intensive studies to achieve the above-mentioned object, the inventor of the present invention provided a belt-shaped convex portion in the peripheral portion as a cushioning material and provided a large number of convex portions inside thereof. By using the sheet-like material having the above, and further by using this sheet-like material in two layers with a wood board in the middle, it satisfies the sound insulation performance of sound insulation class L-50 or more and has practical performance as a floor material. The inventors have learned that it can be used as a wood composite soundproof flooring material and have completed the present invention.

That is, the wood composite soundproofing flooring material of the present invention has a first cushioning material, a second cushioning material, and a second cushioning material on the back surface of the first wood board with the decorative veneer stuck on the surface.
A wooden composite soundproof floor material obtained by sequentially laminating a wooden board and a second cushioning material, wherein the first and second cushioning materials have continuous strip-shaped projections in their peripheral portions, and The gist of the present invention is that it is a sheet-like material having a large number of convex portions provided at predetermined intervals inside.

Further, as the above-mentioned second cushioning material, instead of the above-mentioned sheet-shaped material, band-shaped convex portions are intermittently formed at predetermined intervals at the peripheral portion, and a large number of convex portions are provided inside at predetermined intervals. A sheet-like material may be used, and a wooden composite soundproof flooring material having higher performance can be obtained.

The decorative veneer usually has a thickness of about 0.2 to 1.5 mm, and various projecting plates and rotary veneers are used, but the veneer is not limited to these.

On the other hand, the first wood board usually has a thickness of about 2 to 5 mm, and the second wood board has a thickness of usually 3 to 9 mm.
In addition, wood materials such as plywood, fiberboard, and particle board are used.

The first and second cushioning materials are sheet materials made of foam such as soft synthetic resin, for example, soft vinyl chloride resin foam sheet,
The flat part and the convex part are integrally molded, and the expansion ratio is about 3 to 6 times. If the expansion ratio is 3 times or less, the material becomes too hard and the required cushioning effect cannot be obtained, resulting in poor soundproofing performance. When the foaming ratio is 6 times or more, the material becomes too soft, so the material is compacted when a load is applied and the cushioning effect is not obtained, and the sound insulation performance is poor and the floor sinks too much for walking. It also has an adverse effect on the feeling.

Various fillers may be mixed in this foam sheet for the purpose of improving the resilience to repeated impact and the durability. As such a filler, for example, mica is used. And, for example, when using the above soft vinyl chloride resin, 15 parts by weight of mica to 100 parts by weight of this vinyl chloride resin, and 60 to 70 parts by weight of a plasticizer, and other trace amounts of additives are mixed, and the expansion ratio is also increased. A soft vinyl chloride resin foam sheet that has been tripled in size is preferably used. However, the use of such a filler is not particularly limited in the present invention, as long as it has good resilience and durability against repeated impact.

By the way, in the present invention, the band-shaped convex portion provided on the outer peripheral portion of the cushioning material suppresses influences such as strength and deformation when a load is applied to the peripheral portion of the floor material, and maintains practical performance as the floor material. It is for.

This strip-shaped convex portion has a width of 5 to 20 mm and a height of 1 to 5 mm. If the width of the band-shaped convex part is 5 mm or less, the deformation of the floor material when the load is applied to the peripheral part is large, and the actual strength when actually processed is weak and it is easy to break, etc. Get out. on the other hand,
When the width of the strip-shaped convex portion is 20 mm or more, local deformation due to the load on the peripheral portion can be suppressed, but the effect of reducing the floor impact sound deteriorates.

The height of the convex portion provided inside the cushioning material is about 1 to 5 mm and the diameter is about 5 to 30 mm. This convex portion is for reducing the contact area with the floor base and for providing a continuous air layer. Further, since the convex portions are provided substantially uniformly at predetermined intervals, there is an effect that load deformation with respect to the floor surface is made uniform.

By the way, as described above, even if the sheet-like material is provided as the second cushioning material, the belt-shaped convex portions are intermittently provided on the outer peripheral portion and a large number of convex portions are provided on the inner side at predetermined intervals. good. In this case, the band-shaped convex portions are provided intermittently to the extent that the strength and deformation of the peripheral portion against the load cannot be used for the basic performance of the floor material. Further, by using such a sheet-like material, the contact area between the second cushioning material and the floor base is further reduced, so that the soundproofing performance is further improved.

<Operation> The wood composite soundproof floor material of the present invention in which the first and second cushioning materials are laminated via the wood board as described above is a sound insulation grade L-.
Has a soundproofing performance of 50 or more.

Also, since the above-mentioned strip-shaped projections are provided in the peripheral portion of the cushioning material, even when a load is applied to the peripheral portion of the floor material, large deformation is not locally caused and cracks in the corners do not occur, and the peripheral portions are not actually deformed. Even when processing is performed, the band-shaped convex portions make it difficult to break, so that the practical performance as a wooden flooring material can be secured.

<Examples> Examples will be described below.

FIGS. 1 (A) to (C) show a wood composite soundproof flooring of Example 1, which has a decorative veneer 1 made of a veneer having a thickness of 0.3 mm attached to the surface thereof. On the back side of the wooden board 2 made of plywood with a thickness of 2.7 mm, a cushioning material 3 made of a soft vinyl chloride resin foam sheet and having a thickness of 3 mm, a wooden board 4 made of a plywood having a thickness of 5 mm, and the above-mentioned cushioning material. 3mm thick cushioning material 5 similar to 3 is laminated and stuck in order, and the overall size is 300mm x 6
The thickness is 00mm and the total thickness is about 14mm.

Among these, the cushioning material 3 has a flat portion with a thickness of 1 mm, a continuous strip-shaped convex portion 3a with a width of 10 mm and a thickness of 3 mm in its peripheral portion, and a diameter of 15 mm and a thickness of 3 mm inside. The cylindrical protrusion 3b
A large number of sheet-shaped objects are provided at intervals of 50 mm, and the ratio of the total area of the band-shaped convex portions 3a and the convex portions 3b to the sheet area is 16.8%. The cushioning material 5 is a sheet-like material similar to the cushioning material 3 described above, and has a strip-shaped protrusion 5a and a cylindrical protrusion 5b.
To have.

On the other hand, FIGS. 2 (A) to (C) show a wood composite soundproof flooring material of the second embodiment, which has the same structure as that of the first embodiment except that a cushioning material 6 is used instead of the cushioning material 5. belongs to. This cushioning material 6 has a flat portion with a thickness of 1 mm, a width of 10 mm, and a thickness.
A sheet in which strip-shaped protrusions 6a having a length of 3 mm and a length of 100 mm are intermittently provided in the peripheral portion thereof at intervals of 100 mm, and a large number of cylindrical protrusions 6b having a diameter of 15 mm and a thickness of 3 mm are provided at an interval of 50 mm inside. In the form
The ratio of the total area of the strip-shaped convex portions 6a and the convex portions 6b to the sheet area is 12.4%.

Further, FIGS. 3 (A) and 3 (B) show a wood composite soundproof flooring material of a comparative example. Instead of the cushioning materials 3 and 5 used in Example 1, a flat soft material having a thickness of 3 mm is used. The cushioning materials 7 and 8 made of a vinyl chloride resin foam sheet are used respectively.

In order to test the soundproofing performance of these three types of wood composite soundproofing floor materials, in accordance with JIS A 1418 (floor impact sound level measuring method at the construction site), a lightweight floor with a concrete floor slab of 150 mm thickness The impact sound level (dB) was measured.

The results are as shown in Table 1 and FIG. 4, and the floor material of Example 1 cleared the sound insulation grade L-50, and the floor material of Example 2 cleared the sound insulation grade L-45.

<Effects of the Invention> As described above, according to the present invention, it is possible to provide a wood composite soundproof flooring material having sound insulation performance of sound insulation class L-50 or higher and practical performance as a wood flooring material. .

[Brief description of drawings]

FIG. 1 (A) is an explanatory view of the construction of the wood composite soundproof flooring of Example 1, FIG. 1 (B) is a perspective view of this flooring, and FIG. 1 (C).
Is a sectional view taken along the line AA in FIG. 1 (B) and FIG. 2 (A)
Is an explanatory view of the construction of the wood composite soundproof flooring material of Example 2, FIG. 2 (B) is a perspective view of this flooring material, and FIG. 2 (C) is a sectional view taken along line BB in FIG. 2 (B). FIG. 3 (A) is an explanatory view of the structure of a wood-based composite soundproof flooring material of a comparative example, FIG. 3 (B) is a cross-sectional view of this flooring material, and FIG. 4 is the result of the soundproofing performance test of these flooring materials. It is a graph showing. 1 ... Makeup veneer, 2,4 ... Wood board, 3,5,6-8 cushioning material.

Claims (2)

[Scope of utility model registration request] 1. A wood composite soundproofing comprising a first cushioning material, a second cushioning board, and a second cushioning material, which are sequentially laminated on the back surface of a first wood board having a decorative veneer attached to the front surface thereof. A flooring material, wherein the first and second cushioning materials are sheet-like materials having continuous strip-shaped convex portions at their peripheral portions and a large number of convex portions provided inside at predetermined intervals. A wooden composite soundproof flooring characterized by 2. As the second cushioning material, instead of the sheet-shaped material, band-shaped convex portions are intermittently formed at a peripheral portion at a predetermined interval, and a large number of convex portions are provided inside at a predetermined interval. The wood-based composite soundproof flooring material according to claim 1, wherein a sheet-like material is used.