JPH0547220Y2 - - 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.

[Prior Art] Conventionally, flooring materials for medium-to-high-rise residences have generally consisted of carpets or the like directly attached to concrete floors through 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 the floor of an upper floor, impact noise applied to the wood flooring is transmitted from the upper floor to the lower floor through the wood flooring material, and is echoed downstairs.
It had the disadvantage of impairing 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 isolating sheet pasted on the back side of the wooden board, a large number of through holes pasted on the back side of the vibration isolating sheet, and the through holes. It is characterized by being composed of a decorative plywood made of a grooved perforated wooden board having communicating grooves, 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, as a sheet with a vibration damping function, a PVC sheet, a rubber sheet, etc. can be mentioned, and a sheet with a heat resistance of 0.8 to 2 mm is 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 grooved perforated wooden board 3, and a cushioning material 4 are bonded in this order. In addition, in this invention,
For convenience, the part consisting of the above-mentioned wooden board 1, the vibration-proof sheet 2 pasted on the back side of the wooden board, and the grooved perforated wood board 3 pasted on the back side of the vibration-proof sheet is referred to as "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. Furthermore, if the decorative plywood is cut into smaller pieces than a single sheet (30cm x 90cm) and joined so that grooves are formed at the joints as shown in Figure 2, the grooves will block the sound propagation path. This provides even better sound insulation effects.

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 FIG. 3, a grooved perforated wooden board 3 having a large number of through holes 6 and grooves 7 communicating the through holes 6 is bonded to the back surface of the intermediate layer. Thereby, as will be described later, the sound insulation effect can be improved without unnecessarily reducing the mechanical strength of the grooved perforated wooden board 3. As this grooved and perforated wooden board, plywood, parallel plywood, hardboard, particle board, etc. can be used.

FIG. 3 shows a partial perspective view of the grooved and perforated wooden board seen from the back side. Although not shown here, grooves may also be provided at the ends. FIG. 4 shows a sectional view taken along line A-A of the grooved and perforated wooden board shown in FIG. 3. The thickness of the grooved perforated wood board is preferably 2.5 to 4.0 mm, and the hole diameter is 5 mm.
~15 mm is preferred, but not limited thereto. Further, the groove width may be approximately the same as the diameter of the hole or may be smaller than that.

In the sound-insulating wooden flooring material according to the present invention, as described above, a large number of through holes 6 and grooves 7 communicating with the through holes are bored and the grooved perforated wooden board 3 is used as the intermediate layer. , has a unique effect.
That is, since the grooved perforated wooden board 3 with a large porosity can be obtained without unnecessarily lowering the mechanical strength, the effectiveness of the vibration-proof sheet 2, the cushioning material 4, and the grooved perforated wooden board 3 is improved. It becomes possible to greatly reduce the contact area, and the transmission area of sound from above to below through the grooved perforated wooden board 3 itself can be greatly reduced.

Another method of forming gaps in the wooden board located in the middle is to form a large number of grooves in the width direction of the wooden board, but forming the grooves means forming a continuous gap 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 pasted on the back side of the board, and the distorted part appears in the shape of a cut groove when the surface of the flooring material is irradiated with light. Since it looks as if there is a shadow along the floor, the flooring material itself is considered to be defective and must be re-installed.

This inconvenience can be largely eliminated by forming a large number of through holes and grooves communicating the through holes. That is, when a void having the same volume as a plurality of cut grooves is formed by a plurality of through holes 6 and a groove 7 that communicates the through holes as shown in the figure, the grooves communicate through the groove. Since the voids formed by the plurality of through-holes are discontinuous, except for the parts, the voids have little effect on the mechanical strength of the wooden board. As a result, the probability of "deformity" occurring is greatly reduced, and 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.

In addition, in the sound-insulating wood flooring material of the present invention,
By providing the groove 7 that communicates with the through hole 6, it is expected that the groove 7 will also have the function of blocking the propagation of sound in the plane direction, thereby limiting the spread of impact sound. In the sheet of the present invention, the sound insulation effect is further improved.

Furthermore, although one piece of the grooved and perforated wooden board 3 is effective, if two pieces are used and the through holes 6 are shifted and the sound is laminated together, the sound will be diffusely reflected at the shifted portion, so that it will not pass through the through hole. It is possible to reduce the sound volume reaching downwards or upwards, and it is expected that the sound insulation effect will be further improved.

As the cushioning material 4, polyolefin foam,
Rubber foams and the like can be used, and among these, closed foams are preferred because they have excellent waterproof properties and are less prone to collapse than open foams. Further, as a cushioning material, a rubber foam with a juute woven fabric attached to the back side can also be used, and in this case, the juute woven fabric is attached to the bottom surface of the flooring material.

If the above-mentioned cushioning material is made of a material that can be provided with projections, if a flooring material having the structure shown in FIG. 5 is manufactured using a cushioning material having projections on the back surface,
The protrusions reduce the contact area between the flooring material and the concrete surface, reducing the sound transmission path, thereby increasing sound insulation. The protrusions provided on the back surface of the cushioning material preferably have a diameter of about 10 mm and a height of about 1 to 2 mm, and may have any shape such as circular, oval, or square.

Incidentally, it is possible to optionally suppress the movement of the surface layer plywood by performing a sag processing on the surface layer wood board and the middle layer wood board including the vibration isolating sheet 2, that is, around the decorative plywood part. At that time,
As a decorative plywood, it may be cut into smaller pieces than a single sheet (30cm x 90cm) and joined so that grooves are formed at the joint as shown in Figure 2.In that case, the grooves will prevent sound propagation. Since the route may be blocked, it is expected that the sound insulation will be further improved.

In addition, when we conducted a sound insulation test using cushioning materials with and without protrusions on the back side, the other configurations were the same, and we found that they were easily felt by the human ear.
At 125 decibels and 250 decibels, those with protrusions are 1 to 2 times lower than those without protrusions.
The decibels were reduced.

Example 1 Decorative plywood with a size of 30 cm x 90 cm and a thickness of 2.8 mm, a PVC sheet containing powdered lead with a thickness of 0.8 mm, a perforated plywood with a thickness of 2.7 mm, a hole diameter of 10 mm, and a groove depth of 1 mm, 5.0 mm.
A flooring material laminated with rubber foam was manufactured.

Example 2 A wood board, a sound insulation sheet, and a grooved and perforated wood board were laminated in sequence, 6.3 mm thick, 60 mm wide, and 900 mm long.
Five slender rectangular plates were slightly shifted in the vertical direction and joined together at the male and female fruit. 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 manufactured in the same manner as in Example 1 except that the grooved perforated plywood was replaced with non-perforated plywood.

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

As is clear from FIG. 6, the flooring material of the present invention has superior sound insulation properties compared to the flooring material of the comparative example.

Comparative Example 2 A flooring material was manufactured in the same manner as in Example 1, except that perforated plywood without grooves having a groove depth of 1 mm was used.

When the same sound insulation test as in Example 1 was conducted, the floor impact sound level of the comparative example was 1 to 2 decibels higher than that of Example 1 at 125 decibels and 250 decibels, which are easily felt by the human ear. Indicated.

Example 3 Decorative plywood with size 30cm x 90cm, thickness 2.8mm, PVC sheet containing powdered lead 0.8mm thick, perforated plywood with grooves, thickness 2.7mm, hole diameter 10mm, groove depth 1mm, thickness
A flooring material laminated with 5.0 mm polyolefin foam was manufactured.

Example 4 A wood board, a sound insulating sheet, and a grooved and perforated wood board were laminated in sequence, 6.3 mm thick, 60 mm wide, and 900 mm long.
Five slender rectangular plates were slightly shifted in the vertical direction and joined together at the male and female fruit. 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 3 A flooring material was manufactured in the same manner as in Example 3 except that the grooved 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 3 are shown in FIG.

As is clear from FIG. 7, the flooring material of the present invention has better sound insulation properties than 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 or a cushioning sheet was used instead of a sound insulation sheet.

[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 and 2 are cross-sectional views showing sound-insulating wooden flooring as an embodiment of the present invention, Figure 3 is a partial perspective view of a grooved wooden board seen from the back side, and Figure 4 is a cross-sectional view showing a sound-insulating wooden flooring material as an example of the present invention. 3
Figure 5 is a cross-sectional view showing a sound-insulating wooden flooring material as an example of the present invention, and Figures 6 and 7 are cross-sectional views of flooring materials according to an example of the present invention and a comparative example. It is a measurement diagram showing sound insulation properties. DESCRIPTION OF SYMBOLS 1...Wood board, 2...Vibration isolating sheet, 3...Grooved perforated wood board, 4...Buffer material, 5...Hot melt resin, 6...Through hole, 7...Concave groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A wooden board, a vibration-proofing sheet pasted on the back of the wooden board, a number of through-holes pasted on the back of the vibration-proofing sheet, and grooves communicating the through-holes. 1. A sound-insulating wood-based flooring material comprising a decorative plywood comprising a grooved and perforated wood board having the following characteristics: and a cushioning material bonded to the back side of the decorative plywood. (2) Utility model registration claim No. (1) characterized in that the grooved and perforated wood board is composed of two grooved and perforated wood boards bonded together with the holes shifted in position.
Sound insulating wood flooring material as described in section. (3) The utility model registration claim No. 1 is characterized in that the decorative plywood is a small-split type decorative plywood.
Sound-insulating wood flooring material described in paragraph (1) or paragraph (2). (4) Utility model registration claim No. (1) characterized in that the cushioning material has protrusions on the back surface.
The sound-insulating wooden flooring material according to any one of paragraphs to (3).