JPH0623643Y2 - Sound insulation wooden floor material - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sound insulation wooden floor material suitable for being directly applied to a concrete floor material.

[Prior Art] Conventionally, in many cases, the floors of middle- and high-rise houses are made by directly attaching carpets to a concrete floor via felt. However, carpets are easily soiled, and the occurrence of mites has been a problem.

Therefore, instead of sticking carpets, it has been changed to construct wooden floors by directly sticking wooden floors to concrete floors. There was a new problem of damage.

[Problems to be Solved by the Invention] An object of the present invention is to solve the above-mentioned problems and to provide a wooden floor having excellent sound insulation.

[Means for Solving Problems] The present invention provides a foamed sheet having cushioning properties on the back surface of a wooden board,
A sound-insulating wooden flooring material characterized in that a perforated wooden board is sequentially laminated to form a base material, and a cushioning material having irregularities on the lower surface is laminated to the back surface of the base material.

Hereinafter, the sound-insulating wooden flooring material of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 is a wooden board, and a foamed sheet 2 having a cushioning property, a perforated wooden board 3, and a cushioning material 4 having irregularities on the lower surface are sequentially attached to the back surface of the wooden board 1.

As the wood board 1, plywood, particle board, hard board, LVL (parallel plywood), etc. can be mentioned, and a name wood veneer or a decorative synthetic resin sheet is attached to the surface thereof, or a decorative layer is formed by painting. May be formed. When the flooring material of the present invention is used as a flooring material, a decorative layer is unnecessary.

The thickness of the wood board 1 is preferably 2.5 to 3.3 mm, but is not limited to this.

The cushioning foam sheet 2 to be attached to the back surface of the wooden board 1 may be a cushioning foam sheet such as a rubber foam or an olefinic foam, and preferably has a thickness of 1 to 2 mm.

Further, in the present invention, a perforated wood plate 3 having a large number of through holes as shown in FIGS. 1 and 2 is attached to the back surface of the foaming sheet 2 having the cushioning property as a wood plate of an intermediate layer. By doing so, the sound insulation effect can be improved without unnecessarily reducing the mechanical strength of the intermediate-layer wood board 3. As the perforated wood board, plywood, particle board, hard board, LVL or the like can be used. The thickness is preferably 2.5-4.0 mm and the hole diameter is 5-
15 mm is preferable, but not limited to these.

As the cushioning material 4, a polyolefin-based foam, a rubber foam, or the like is used, and among them, the independent foam is preferable because it has excellent waterproofness and is less likely to settle than the continuous foam.

In the flooring material according to the present invention, by using the perforated wood board 3 having a large number of through holes as the intermediate layer as described above, the perforated wood board having a large porosity without unnecessarily reducing the mechanical strength. Since the plate 3 can be obtained, the sound transmission area from the upper side to the lower side through the cushioning foam sheet 2 and the cushioning material 4 and the perforated wood plate 3 itself can be greatly reduced.

There is also a method of forming a large number of kerfs in the width direction of the wooden board as another method of forming a gap in the wood material located in the middle, but forming a kerf is to form a continuous gap in the entire width direction. As a result, the mechanical strength of the wooden board is reduced, and after the construction of the wooden floor material on the floor surface,
Due to the unevenness of the floor surface, there is a high possibility that slight bending (so-called “sag”) will occur in the kerf portion.

Due to such bending, the wooden board as the surface material and the foamed sheet attached to the back surface of the floor material are also distorted, and the distorted portions follow the shape of the kerf when the surface of the floor material is exposed to light. Since it looks as if it is a shadow, the floor material itself has to be reconstructed as a defective product.

The disadvantage is largely eliminated by forming a large number of through holes. That is, since the voids having the same volume as the plurality of kerfs and formed by the plurality of through holes are discontinuous, the influence on the mechanical strength of the wood board is small. As a result, the probability that "sag" will occur is greatly reduced, and it is possible to avoid the occurrence of defective products after construction. Furthermore, it is possible to form a large void that cannot be achieved by the kerfs.

It should be noted that the wooden flooring material in which the wooden board of the surface layer, the foaming sheet having the cushioning property and the wooden board of the intermediate layer are divided into small pieces and joined as shown in FIG. 2 is not divided into smaller pieces. Better sound insulation than large size wood floors. It is considered that this is because it becomes difficult for the sound to propagate in the small parts. The wood board cut into small pieces as described above is subjected to loose tongue processing so that the wood mouth surface can be slightly bent, and the hot-melt resin 5 having flexibility after curing is formed at the lower part of the tongue processing.
Is poured and joined, and one cushioning material 4 is placed on the entire back surface.
Are pasted together.

[Example 1] Size 1 shaku x 3 shaku, 2.8 mm thick decorative plywood, 1.5 mm thick calcium carbonate-added polyethylene foam sheet, thickness 2.
7 mm, hole diameter 12 mm plywood with holes, diameter 12 mm on the bottom, height 2 mm
A 6.0 mm-thick polyethylene foam having 3,000 protrusions / m ² was attached to produce a desired floor material.

[Example 2] The decorative plywood used in Example 1, the calcium carbonate-added polyethylene foam sheet, and the perforated plywood were laminated in this order, and then cut to obtain a slender product having a thickness of 7.0 mm, a width of 60 mm, and a length of 900 mm. A rectangular base material was manufactured, and five pieces of the base material were shifted in the vertical direction and joined with male and female fruits. The male and female fruits were slightly bent at the joints and were loosely joined so as to fit easily into the irregularities of the base, and the lower part was joined with a hot melt resin having some flexibility after curing. Then, one piece of the polyethylene foam used in Example 1 was attached to the entire back surface of the back surface to manufacture a desired floor material.

[Comparative Example 1] A flooring material was manufactured in the same manner as in Example 1 except that the perforated plywood was changed to the non-perforated plywood.

[Comparative Example 2] A flooring material was produced in the same manner as in Example 1, except that the polyethylene foam was a polyethylene foam having a smooth lower surface.

FIG. 3 shows the measurement results of the floor impact sound levels of the floor materials of Example 1, Example 2, Comparative Example 1 and Comparative Example 2 described above.

As is clear from FIG. 3, the flooring material of the present invention is superior to the comparative example in sound insulation.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to obtain a wooden floor material having excellent sound insulation properties, and even when the surface of the floor material is exposed to light after construction, the intermediate layer The holes in the perforated wooden board of are not visible from the surface as shades,
It can form a beautiful floor surface.

[Brief description of drawings]

1 and 2 are cross-sectional views showing a sound insulation wooden floor material as an embodiment of the present invention, and FIG. 3 is a measurement diagram showing sound insulation properties of floor materials of the embodiment and the comparative example of the present invention. . In the drawing, 1 is a wooden board, 2 is a foamed sheet having a cushioning property, 3
Is a perforated wood board, 4 is a cushioning material having irregularities on the lower surface, 5 is hot melt resin

Claims (2)

[Scope of utility model registration request] 1. A base material is formed by sequentially laminating a foamed sheet having a cushioning property and a perforated wooden board on the back surface of a wooden board to form a base material, and a buffer material having irregularities on the bottom surface is bonded to the back surface of the base material. Sound-insulating wood flooring characterized by 2. The sound insulating wood flooring material according to claim 1, wherein the base material is a small type decorative board.