JPH074011A - Wooden sound insulating floor material - Google Patents

Abstract

PURPOSE:To increase sound insulating capacity, by forming a groove so as to reach to the second layer of veneer from the superficial face of a plywood out of the rear face of the decorative plywood and sticking a foamed buffering material with hollow protrusions to the rear face of the decorative plywood. CONSTITUTION:Grooves 3 are formed so as to reach the second layer of veneer from the superficial face of a plywood 1, out of the rear face of the 5-ply wood 1 forming a decorative layer 2 having a fancy veneer or a decorative sheet stuck to the surface thereof. A buffering material 4 of foamed rubber protrusions composed of soft and hollow protrusions 5 with a high foamed ratio and harder protrusions 6 with a lower foamed ratio are stuck to the rear face of the plywood 1. Accordingly, an excellent sound insulating and sufficiently strong floor material can be formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive wooden soundproof flooring material having excellent soundproofing performance.

[0002]

2. Description of the Related Art Recently, wooden floors have been used in many cases for floors of middle- and high-rise houses, but wooden floors have the drawback of being extremely expensive.

[0003]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks and to provide an inexpensive wooden soundproof flooring material which is excellent in soundproofness.

[0004]

The present invention has a high expansion ratio and softness on the back surface of a wooden substrate in which a large number of grooves are formed from the back surface so as to reach the second layer veneer from the front surface side of the 5-ply plywood. The present invention relates to a wood-based soundproofing floor material, characterized in that a foamed cushioning material with hollow protrusions, which comprises hollow protrusions and hollow protrusions having a low expansion ratio, is attached.

Hereinafter, the wood-based soundproof flooring material of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 is a 5-ply plywood, and a decorative layer 2 may be formed by pasting a nameplate veneer or a decorative synthetic resin sheet on this surface, or by painting. Then, the groove 3 is formed from the back surface of the 5-ply plywood 1 so as to reach the second-layer veneer from the front surface side of the plywood.
The groove width of the groove 3 is 1.5 to 3 mm, and the groove pitch is 10 to 25 m.
m is preferable in consideration of productivity, soundproofness, strength, etc.,
It is not limited to this. By forming the groove 3 in this way, it is possible to improve the soundproof performance of the wooden soundproof floor material. The groove 3 is formed so as to reach the second layer veneer from the surface side of the plywood because it is preferable to form the groove as deep as possible, but if it is too deep, the bending strength of the wood-based soundproof floor material will be increased. Since the wood-based soundproofing floor material may fall apart during transportation and construction, it should be left up to the second layer from the surface of the plywood. There are two ways to leave the second layer, that is, a case where the groove is formed to reach the second layer and a case where the groove is formed to the middle of the second layer.

On the back surface of the wooden board 1, a foam cushioning material 4 with a hollow protrusion, which is composed of a protrusion having a high expansion ratio and a hollow inside and a protrusion having a low expansion ratio and a hard eye, is attached.

As the foamed cushioning material 4 with a hollow protrusion attached to the back surface of the wooden board 1, a rubber foam with a protrusion containing neoprene, butadiene acrylonitrile rubber, or butadiene slene rubber as a main component is used. FIG. 4 shows a plan view of the cushioning material 4 made of this rubber foam with protrusions. The cushioning material 4 has a high expansion ratio and a soft protrusion 5 having a hollow interior.
And the protrusion 6 having a low expansion ratio and hard eyes. Preferably, the cushioning material 4 is configured such that the four sides and diagonal portions of the rhombus are protrusions 6 having a low foaming ratio and low hardness, and the protrusions 5 having a high foaming ratio and a soft interior are arranged at the intersections of the diagonal lines of the rhombus. It is made up of combinations. And the protrusion 5
Is higher than the protrusion 6. The sound transmission can be prevented by the cushioning effect of the hollow portion 7 of the protrusion 5 of the cushioning material 4. In addition, even if the hollow portion 7 of the projecting portion 5 having a high foaming ratio and a soft interior is not received by the load from above, the projecting portion 6 having a low foaming ratio and being hard can receive it. ing.

The sound-insulating wooden floor material in which a cushioning sheet is further attached to the back surface of the foamed cushioning material 4 with hollow protrusions has a further cushioning effect, and the surface thereof is applied to the concrete floor. This serves as an adhesive surface when the protrusions are formed, and it is prevented that the gap between the protrusions of the rubber foam with protrusions is filled with the adhesive and the cushioning effect is reduced.

Further, as shown in FIGS. 2 and 3, the plywood 1 is cut to produce an elongated rectangular plate material 8 which is
The plates are shifted slightly in the vertical direction so that the plane shape becomes stepwise, and they are joined by the male and female groves 10. The male and female groves 9 and 10 are slightly bent at the joints and It is loosely bonded so that it easily fits into the unevenness, and the hot melt resin 11 having a little flexibility after curing is injected into the groove on the back surface of the bonding portion and bonded, and the entire back surface is made of foamed cushion with hollow protrusions. The material 4 may be attached.

[0010]

[Example 1] Thickness 9 mm, size 30 cm x 180 cm
A groove was formed from the back surface of the oak veneer-bonded decorative plywood in a direction orthogonal to the longitudinal direction thereof and from the front surface side of the plywood to the second-layer veneer. The groove width of this groove was 2 mm, and the groove pitch was 20 mm. A cushioning material made of butadiene-styrene rubber foam with a hollow projection having a thickness of 6 mm was attached to the back surface of this decorative plywood to manufacture a desired floor material.

[0011]

[Example 2] The decorative plywood used in Example 1 was cut, and male and female groves were formed on four sides to obtain a thickness of 9.0 m.
An elongated rectangular plate material having a length of m, a width of 6 cm, and a length of 90 cm was produced, and five sheets were vertically displaced by a predetermined dimension so that the planar shape was stepwise. The male and female ridges are slightly joined at the joints and are loosely joined so that they easily fit into the irregularities of the base. Melt resin was injected and joined. Then, Example 1 is formed on the entire back surface thereof.
The foamed cushioning material with hollow protrusions used in step 1 was attached to produce a desired floor material.

[0012]

Comparative Example 1 Instead of the decorative plywood used in Example 1,
A desired floor material was produced in the same manner as in Example 1 except that a decorative plywood having no groove was used.

[0013]

COMPARATIVE EXAMPLE 2 A desired floor material was prepared in the same manner as in Example 1 except that a butadiene styrene rubber foam having a thickness of 6 mm was used in place of the foam cushioning material with hollow protrusions used in Example 1. Manufactured.

FIG. 5 shows the results of measuring the soundproofing performance of Examples 1 and 2 and Comparative Examples 1 and 2.

[0015]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, not only is it extremely excellent in soundproofing, but it can also be used as a floorboard in terms of strength.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a wooden soundproof flooring material according to the present invention.

FIG. 2 is a plan view showing another embodiment of the wooden soundproof flooring material according to the present invention.

FIG. 3 is a partial cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of a foam cushioning material with hollow protrusions.

FIG. 5 is a diagram comparing the soundproofing performances of Examples 1 and 2 and Comparative Examples 1 and 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plywood 2 Decorative layer 3 Grooves 4 Foam cushioning material with hollow protrusions 5 Hollow protrusions 6 Protrusions 7 Hollow portions 8 Rectangular plate materials 9 Male pins 10 Female pins 11 Hot melt resin

Claims (1)

[Claims] 1. A wooden substrate having a large number of grooves formed from the back surface so as to reach the second-layer veneer from the front surface of the 5-ply plywood, has a high expansion ratio and a soft protrusion with a hollow interior. A wood-based soundproof flooring material having a foamed cushioning material with hollow protrusions consisting of protrusions with low magnification and hard eyes.