JPH0610035Y2 - 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, but wooden floors are inferior in sound insulation to carpets, so they are more comfortable to live in. There was a new problem of damage.

[Problems to be solved by the invention] The inventors of the present invention have solved the above-mentioned problems and have conducted daily research for the purpose of providing a wooden flooring material having excellent sound insulation. A sound insulation wooden flooring material in which a cushioning foam sheet, a perforated wooden board, and a cushioning material having irregularities on the bottom surface are sequentially laminated is devised and filed first. This device is a further improvement of the above device.

[Means for Solving the Problem] The present invention comprises a wood board, a foamed sheet having a cushioning property attached to the back surface of the wood board, and a perforated wood board attached to the back surface of the foaming sheet having a cushioning property. And a cushioning material having a plurality of independent convex portions on the lower surface attached to the back surface of the decorative plywood, and the center of the tip of the convex portion is recessed inward. Related to sound insulation wooden floor 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 buffering property and a perforated wooden board 3 are sequentially attached to the back surface of the wooden board 1 to form a decorative plywood, and on the back surface of the decorative plywood, The cushioning material 5 having a large number of independent convex portions is attached to the lower surface. Then, the central portion of the tip of the convex portion 4 has a shape recessed inward.

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.

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

Further, plywood, particle board, hard board, LVL or the like can be used as the perforated wood board 3 of the intermediate layer. The thickness is preferably 2.5 to 4.0 mm, and the hole diameter is preferably 5 to 15 mm, but is not limited thereto.

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 wood board as another method of forming a gap in the wood board located in the middle, but forming the kerf means forming a continuous space 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 of the voids 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.

As the cushioning material 5, 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 prone to fatigue than the continuous foam. The diameter of the convex portion 4 is preferably 5 to 30 mm and the height is preferably 1 to 5 mm, but not limited to this. Further, it goes without saying that the surface shape of the convex portion 4 may be square, triangular or polygonal other than circular. The center of the tip of the protrusion 4 is recessed inward, and this recess serves to escape the adhesive when the wooden floor material is adhered to the concrete floor with the adhesive. That is,
If the tip of the convex portion 4 is smooth, when the wooden floor material is brought into contact with the concrete floor coated with the adhesive, the convex portion 4 of the wooden floor material causes the adhesive to escape to the vicinity of the convex portion 4, It enters the gap between the portion 4 and the convex portion 4 and fills the gap. Generally, the sound insulation of floor materials tends to improve as the contact area between the concrete floor and the wooden floor material decreases, and thus the gap between the concrete floor and the wooden floor material is filled with an adhesive. Causes a decrease in sound insulation. Therefore, in the present invention, in order to maximize the sound insulation performance of the cushioning material having a large number of independent convex portions on the lower surface, that is, to prevent the portions other than the convex portions from coming into contact with the floor surface, the tips of the convex portions are By adopting a structure in which the central part is recessed inward, this allows the initial sound insulation performance to be obtained even if the adhesive is applied in an excessive amount.

As shown in FIG. 2, the decorative plywood in which the surface wooden board, the foaming sheet having the cushioning property, and the perforated wooden board of the intermediate layer are integrated into smaller pieces is not divided into smaller pieces. It has better sound insulation than large format plywood. It is considered that this is because it becomes difficult for the sound to propagate in the small parts. The wooden board that has been split into small pieces as described above has a loose tongue process that allows slight bending on the wood mouth surface, and is flexible after hardening in the groove on the back surface caused by tongue and groove joints. Melt resin 6 is poured and joined, and one cushioning material 5 is attached to the entire back surface thereof.

[Example 1] 30 cm x 90 cm size, 2.8 mm thick decorative plywood, 2.0 mm thick rubber foam sheet, 2.7 mm thick, perforated plywood with 10 mm hole diameter,
Manufacture the desired flooring by sticking a rubber foam of 7.0 mm in thickness, which has 5,000 protrusions / m ² with a diameter of 10 mm and a height of 3 mm on the bottom surface, and the center of the tip of this protrusion is recessed inward. did.

[Example 2] The wood board, the foamed sheet, and the perforated wood board used in Example 1 were sequentially laminated to produce a decorative plywood, which was cut to a thickness of 6.3 mm, a width of 60 mm, and a length of 900 mm. A long and slender rectangular plate material was manufactured, and five sheets were vertically displaced and joined with a male and female ratchet. 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, one polyolefin-based foam was attached to the entire back surface thereof to manufacture a desired floor material.

[Comparative Example] A flooring material was produced in the same manner as in Example 1 except that a rubber foam having a convex tip formed on the lower surface of the rubber foam was smooth.

FIG. 3 shows the measurement results of the floor impact sound level when the floor materials of Examples 1 and 2 and Comparative Example described above were bonded onto a concrete floor via an adhesive.

As is clear from FIG. 3, the flooring material of the present invention is slightly better in sound insulation than the flooring material of the comparative example.

[Advantage of the Invention] As described in detail above, according to the present invention, it is possible to obtain a wooden flooring material having excellent sound insulation properties, and even if the adhesive is applied in an excessive amount at the time of construction, the convex portion Since the adhesive enters the recess formed in the central portion of the tip of the, the parts other than the convex portion do not contact the floor surface via the adhesive, and the initial sound insulation performance can be reliably exhibited. Further, even when the surface of the floor material is exposed to light after the construction, the holes of the perforated wood board of the intermediate layer are not seen as a shadow from the surface, and a beautiful floor surface can be constructed.

[Brief description of drawings]

FIG. 1 and FIG. 2 are cross-sectional views showing a sound insulation wooden flooring material as an embodiment of the present invention, and FIG. 3 is a measurement diagram showing sound insulation properties of flooring materials of the embodiments of the present invention and comparative examples. . 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 convex portion, 5 is a cushioning material, and 6 is a hot melt resin.

Claims (2)

[Scope of utility model registration request] 1. A decorative plywood composed of a wood board, a foaming sheet having a cushioning property attached to the back surface of the wood board, a perforated wood board attached to the back surface of the foaming sheet having a cushioning property, and the makeup plywood. A sound-insulating wooden flooring material, characterized in that it has a large number of independent convex portions on the lower surface attached to the back surface of the above, and is composed of a cushioning material in which the center of the tip of the convex portion is recessed inward. 2. The sound-insulating wood flooring material according to claim 1, wherein the decorative plywood is a split type decorative board.