JPH0543156Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sound-insulating wooden flooring material, and particularly to a sound-insulating wood-based flooring material suitable for being directly applied to a concrete flooring material.

[Conventional technology]

BACKGROUND ART Conventionally, flooring materials for mid-to-high-rise residences have generally been carpets directly attached to concrete floors via felt. However, carpets tend to get dirty easily, require a lot of effort to replace, and are prone to dust mites.

Therefore, instead of pasting carpets, a method of directly pasting wood-based flooring materials onto concrete floors has become more common.

However, since wood flooring has poor sound insulation properties compared to carpets, for example, when wood flooring is directly attached to an upper floor, the impact that is applied to the wood flooring The problem was that the sound propagated through the wooden flooring from the upper floor to the lower floor and echoed downstairs, impairing the livability.

In order to solve these drawbacks, some improvement can be achieved by attaching a synthetic resin foam to the entire back surface of the wooden board, but this is still not sufficient.

[Problem that the invention attempts to solve]

In view of the above-mentioned circumstances, the object of the present invention is to provide a wood-based flooring material with excellent sound insulation properties.

[Means for solving problems]

The present invention to solve the above problems basically consists of a wooden board, a vibration-proof sheet pasted on the back side of the wooden board, and a perforated wooden board with many through holes pasted on the back side of the vibration-proof sheet. Decorative plywood consisting of boards,
and a cushioning material bonded to the back side of the decorative plywood.

In this invention, the term "vibration isolating sheet" is used to generically refer to sheets that have a sound insulation function, a vibration damping function, or a buffer function, and a sheet with a high specific gravity is used as a sheet that has a sound insulation function. For example, a PVC sheet containing powdered lead, a rubber sheet filled with inorganic powder, a lead sheet, etc. Also, examples of sheets having a vibration damping function include a PVC sheet, a rubber sheet, etc., and those having a thickness of 0.8 to 2 mm are preferable.
Not limited to these.

Further, as the buffer function sheet, a foamed sheet such as a rubber foam or an olefin foam is used, and the thickness is preferably 1 to 2 mm.

Hereinafter, the sound-insulating wooden flooring material of the present invention will be specifically explained with reference to the drawings. A sheet (ie, a vibration-proof sheet) 2, a perforated wooden board 3, and a cushioning material 4 are bonded together in this order. In addition, in the present invention, the part consisting of the above-mentioned wooden board 1, the vibration-proofing sheet 2 pasted on the back side of the wooden board, and the perforated wooden board 3 pasted on the back side of the vibration-proofing sheet is referred to for convenience. It is called "decorative plywood".

Examples of the wood board 1 include plywood, particle board, hardboard, parallel plywood, etc., and the surface thereof is decorated as appropriate. This decoration is done, for example, by pasting a veneer of precious wood or a patterned synthetic resin sheet on the surface or by painting it. Note that this invention may also be used as a flooring material, but in this case no makeup is required. The thickness of the wooden board 1 is preferably 2.5 to 3.3 mm, but is not limited to this.

The vibration-proof sheet 2 is attached to the back surface of the wooden board 1 as described above.

Furthermore, in the present invention, the vibration isolating sheet 2
As shown in FIGS. 1 and 2, a perforated wooden board 3 having a large number of through holes is bonded to the back surface of the intermediate layer wooden board. Thereby, as will be described later, the sound insulation effect can be improved without unnecessarily reducing the mechanical strength of the perforated wooden board 3. As the material for this perforated wooden board, plywood, parallel plywood, hardboard, particle board, etc. can be used.
The thickness is preferably 2.5 to 4.0 mm, and the hole diameter is 5 to 15 mm.
are preferred, but are not limited to these.

As the cushioning material 4, polyolefin foam,
Rubber foam or the like is used, and among these, closed foam is preferred because it has excellent waterproof properties and is less prone to collapse than open foam.

In the flooring material according to the present invention, as described above, the perforated wooden board 3 with a large number of through holes is formed as an intermediate layer.
By using , unique effects can be achieved. That is, since it is possible to obtain a perforated wooden board 3 with a large porosity without unnecessarily lowering the mechanical strength, the effective contact area between the vibration-proof sheet 2 and the cushioning material 4 and the perforated wooden board 3 can be increased. This makes it possible to greatly reduce the transmission area of sound from above to below through the perforated wooden board 3 itself.

Another method of forming voids in the wooden board located in the middle is to form a large number of kerfs in the width direction of the wood board, but forming the kerfs means forming a continuous void in the entire width direction. As a result, the mechanical strength of the wood board decreases.
As a result, there is a high possibility that bending (so-called "settling") will occur in the cut groove portion when the wood flooring material is installed on the floor surface.

Such bending causes distortion in the wooden board used as the surface material and the anti-vibration sheet attached to the back of the board, and when the surface of the flooring material is irradiated with light, the distorted part appears in the shape of a cut groove. Since it appears as if there is a shadow along the floor, the flooring material itself is considered to be defective and will have to be re-installed.

This inconvenience can be largely eliminated by forming a large number of through holes. In other words, when forming a void with the same volume as in the case of multiple kerfs using multiple through holes, each void formed by the multiple through holes is discontinuous. impact on target strength is small. As a result, the probability of "sagging" occurring is greatly reduced,
It is possible to avoid the occurrence of defective products during construction. Furthermore, it is also possible to form a large gap that cannot be achieved by cutting grooves.

Furthermore, although one perforated wooden board 3 is effective, if two boards are used and pasted together with the through holes 6 shifted, the sound will be diffusely reflected at the shifted portions, so that the sound will pass through the through holes and move downward or upward. It is possible to reduce the sound volume reaching upwards, and it is expected that the sound insulation effect will be further improved.

In addition, the upper layer wooden board 1 and the middle layer perforated wooden board 3
It is possible to perform the actual cutting process over the entire area, that is, around the decorative plywood part, to suppress the movement of the surface plywood. At that time, the decorative plywood may be divided into smaller pieces than a single sheet (1 shaku x 3 shaku) and joined so that a groove is formed at the joint as shown in Figure 2. In that case, The grooves may block the sound propagation path, resulting in an even better effect in terms of sound insulation.

Example 1 Decorative plywood 1 x 3 x 2.8 mm thick, 0.8 mm thick PVC sheet containing powdered lead, 2.7 mm thick perforated plywood with 10 mm hole diameter, and 5.0 mm rubber foam pasted. Manufactured a composite flooring material.

Example 2 Five thin rectangular boards with a thickness of 6.3 mm, a width of 60 mm, and a length of 900 mm, in which a wooden board, a sound insulation sheet, and a perforated wood board were laminated in sequence, were slightly shifted in the vertical direction and separated into male and female fruits. Joined. The male and female fruits are slightly bent at the joint and are loosely joined to conform to the irregularities of the base, and the lower part is joined with a hot melt resin that has some flexibility after hardening. . A sheet of cushioning material was then attached to the entire back surface to produce a flooring material. The same material as in Example 1 was used.

Comparative Example 1 A flooring material was produced in the same manner as in Example 1, except that a non-perforated plywood was used instead of a perforated plywood.

The measurement results of the floor impact sound levels of the floor materials of Example 1, Example 2 and Comparative Example 1 are shown in FIG.

As is clear from FIG. 4, the flooring material of the present invention has better sound insulation properties than the flooring material of the comparative example.

Example 3 Decorative plywood 1 x 3 x 2.8 mm thick, 0.8 mm thick PVC sheet containing powdered lead, 2.7 mm thick perforated plywood with 10 mm hole diameter, 5.0 mm thick polyolefin foam We manufactured flooring material with the body glued together.

Example 4 Five thin rectangular boards with a thickness of 6.8 mm, a width of 60 mm, and a length of 900 mm, in which a wood board, a sound insulation sheet, and a perforated wood board were laminated in sequence, were slightly shifted in the vertical direction and separated into male and female fruit. Joined. The male and female fruits are slightly bent at the joint and are loosely joined to conform to the irregularities of the base, and the lower part is joined with a hot melt resin that has some flexibility after hardening. . A sheet of cushioning material was then attached to the entire back surface to produce a flooring material. The same material as in Example 3 was used.

Comparative Example 2 A flooring material was manufactured in the same manner as in Example 3, except that the perforated plywood was replaced with non-perforated plywood.

The measurement results of the floor impact sound level of each of the flooring materials of Example 3, Example 4, and Comparative Example 2 are shown in FIG.

As is clear from FIG. 5, the flooring material of the present invention has superior sound insulation properties compared to the flooring material of the comparative example.

In addition, although the above-mentioned example was carried out using a sound insulation sheet, the same effect was shown even if a damping sheet was used instead of a sound insulation sheet.

Example 5 4 mm thick plywood, 1.5 mm thick polyethylene foam with calcium carbonate, 2.7 mm thick, pore diameter
A flooring material was manufactured by sequentially laminating 10 mm perforated plywood and 5 mm thick rubber foam.

Example 6 4 mm thick plywood, 1.5 mm thick polyethylene foam with calcium carbonate, 2.7 mm thick, pore diameter
A flooring material was manufactured by sequentially laminating two 10 mm perforated plywood sheets and 5 mm thick rubber foam. However, above 2
Two sheets of perforated plywood were pasted together with the holes shifted.

The measurement results of the floor impact sound levels of the floor materials of Examples 5 and 6 are shown in FIG.

From FIG. 6, it can be seen that excellent sound insulation can be obtained even when a cushioning sheet is used, and that further improvement in sound insulation can be expected if two perforated wood boards are used.

[Effect of idea]

As described in detail above, the present invention makes it possible to obtain a wood-based flooring material with extremely excellent sound insulation properties.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are cross-sectional views showing sound-insulating wood flooring as an embodiment of the present invention;
5 and 6 are measurement diagrams showing the sound insulation properties of the flooring materials of the embodiments of the present invention and comparative examples. 1... Wood board, 2... Vibration-proof sheet, 3... Perforated wood board, 4... Cushioning material, 5... Hot melt resin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Decoration consisting of a wooden board, a vibration-proofing sheet pasted to the back of the wooden board, and a perforated wooden board with many through holes pasted to the back of the vibration-proofing sheet. A sound-insulating wood flooring material comprising plywood and a cushioning material bonded to the back side of the decorative plywood. (2) The sound-insulating wooden flooring material according to claim 1, wherein the perforated wooden board is composed of two perforated wooden boards bonded together with the holes shifted in position. (3) The sound-insulating wooden flooring material according to claim 1 or 2, wherein the decorative plywood is a divided type decorative plywood.