JP2595936Y2 - Wooden soundproof flooring - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden sound-insulating flooring, and more particularly, to a high-productivity and low-cost flooring, which is designed to have a well-balanced sound insulation performance against a light floor impact sound and a sinking amount against a load. It relates to wooden soundproof flooring.

[0002]

2. Description of the Related Art In recent middle- and high-rise houses, a wooden sound-insulating flooring for direct upholstery, in which a wooden flooring is directly laid on a concrete slab, is used. Usually, these wooden soundproof flooring materials for upholstery are provided with a cushioning material such as a nonwoven fabric on the back surface of the wooden plate material so as to have a sound insulation performance against floor impact sound.
Recently, from the viewpoint of imparting sound insulation performance to the wooden board itself, a method has been proposed in which a damping material such as natural rubber is interposed in the wooden board and cutting grooves are provided at appropriate intervals on the back surface of the wooden board. (See, for example,
No. 42170).

[0003]

[Problems to be Solved by the Invention] However, the wood soundproof flooring material provided with a large number of cutting grooves on the back surface of the woodworking material can improve the sound insulation performance, but the rigidity of the woodworking material is reduced. When a heavy object is placed on the floor, the floor surface may sink due to the load of the heavy object, or in extreme cases, the floor material may be broken.

[0004] On the other hand, in the case of a wood-based sound-insulating floor material having a reduced number of cut grooves on the back surface of the wood-based material, the sound-insulating performance against light floor impact noise is deteriorated because the bending rigidity of the wood-based material is too large. In order to compensate for this, when a cushioning material having a small dynamic spring constant is used, the sinking amount of the floor surface becomes large, and there is a problem that walking feeling is deteriorated. Further, in the case of a wooden sound-insulating flooring material in which a vibration damping material is interposed in a wooden board, there is a problem that productivity at a manufacturing site decreases and production costs increase.

[0005] The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have used inverted plywood as a wooden board so that the bending rigidity of the wooden board is within a predetermined range. By forming a cutting groove in the long side direction and the short side direction of the reverse size plywood back surface, by sequentially laminating a viscoelastic material having a vibration damping property and a fibrous material having a buffering property on the back surface of the wooden board, The present inventors have found that it is possible to provide an inexpensive and highly productive wooden soundproof flooring material which is designed with a good balance of sound insulation performance against light floor impact sound, durability against load, and sinking amount, and achieves the present invention. Therefore, an object of the present invention is to provide a sound-insulating performance against a light floor impact sound, durability against a loaded load and various performances as a sound-insulating floor material such as a sinking amount in a well-balanced manner. It is an object of the present invention to provide a wooden soundproof flooring material.

[0006]

The above objects of the present invention are as follows.
On the back surface of the inverted plywood provided with a wood decorative veneer on the surface, the reverse dimension plywood has cutting grooves in the long side direction and the short side direction, respectively, and has a vibration damping property on the surface on which the cutting grooves are formed. A wooden soundproof flooring material in which a viscoelastic material and a fibrous material having a cushioning property are sequentially laminated, and a bending rigidity in a long side direction of the inverted plywood is 1 to 10 × 10 ³ kg · cm ² . In addition, the bending rigidity in the short side direction is 1 to 5 × 10 ³ k
was achieved Te <br/> by a wooden sound-insulating floor members, characterized in that the g · cm ^2.

In the present invention, the inverted plywood refers to a wood plywood composed of an odd number of wood veneers such that the fiber running direction of the veneers constituting the odd-numbered layers coincides with the short side direction of the woody plywood. Refers to composed plywood. On the other hand, the regular plywood refers to plywood configured such that the fiber running direction of the veneers constituting the odd-numbered layers coincides with the long side direction of the woody plywood.

Hereinafter, the wooden soundproof flooring material of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a cross-sectional view of the wooden soundproof flooring material of the present invention cut in a short side direction. In the drawing, reference numeral (1) denotes an inverted plywood,
(2) is a cutting groove in the long side direction, (3) is a cutting groove in the short side direction, (4) is a viscoelastic material, and reference numeral (5) is a fibrous material.

As shown in the figure, the wooden soundproof flooring material of the present invention has a reverse side of a reverse plywood (1) provided with a wooden decorative veneer (not shown) on the surface, and a long side of the reverse plywood (1). In addition to providing cutting grooves (2) and (3) in the direction and the short side direction,
A viscoelastic material (4) having a damping property and a fibrous material (5) having a damping property are sequentially laminated on the surface where the cutting grooves (2) and (3) are formed.

Inverted plywood used in the present invention (1)
Can be used, a plywood having a 3 to 7 layer structure produced by a known method, and a plywood having a thickness of about 5.5 to 15 mm can be used. In particular, it is preferable to use one having a thickness of about 9 to 12 mm. When the thickness is 5.5 mm or less, actual processing or the like becomes difficult, and when the thickness is 15 mm or more, there is a problem that adjustment with existing members cannot be performed at the time of construction such as reforming.

The thickness of the veneer constituting the inverted plywood (1) may be the same for each layer.
For example, in the case of a plywood having a thickness of 9 mm and a five-layer configuration, usually 0.8 mm, 2.0 mm, 3.2 mm,
Single plates having different thicknesses of 2.0 mm and 0.8 mm can be used.

In the present invention, the cutting groove (2) formed in the long side direction of the back surface of the inverted plywood (1) has a bending rigidity in the long side direction of the inverted plywood of 1 to 10 × 10 ³ kg · cm ² . It is formed so as to be within the range. The cutting groove (3) formed in the short side direction has a bending rigidity in the short side direction of the inverted plywood of 1 to 5 × 1.
It is formed so as to be in a range of 0 ³ kg · cm ² .

When the bending stiffness in the long side direction or short side direction of the inverted plywood (1) is 1 × 10 ³ kg · cm ² or less, desired durability and sinking amount cannot be secured. , 1
If it is 0 × 10 ³ kg · cm ² or more, desired sound insulation performance cannot be obtained. The bending rigidity in the short side direction is 5 ×
If it is 10 ³ kg · cm ² or more, it is not preferable because the concrete slab lacks followability to irregularities and causes warpage after construction.

Adjustment of the bending rigidity of the inverted plywood (1) by the above-mentioned cutting grooves (2) and (3) can be performed by changing the width, depth and interval of the cutting grooves. in this case,
It is preferable that the groove width of the cutting grooves (2) and (3) is about 2 mm and the depth is 60 to 80% of the thickness of the inverted plywood (1). If the depth of the cutting groove is less than 60% of the thickness of the inverted plywood, the desired bending rigidity cannot be obtained,
If it is formed at 80% or more, there is a problem of warpage or deformation, and the commercial value as a woody soundproof flooring material is impaired. In addition, in forming the cutting grooves (2) and (3),
An ordinary cutting method using a circular saw or the like can be used.

As the viscoelastic material (4) having a vibration damping property used in the present invention, known viscoelastic materials such as urethane foam, foamed rubber and foamed polyolefin can be mentioned. Dynamic spring constant is 50 ~
200 × 10 ⁶ N / m ³ and a loss factor of 0.2 to 0.5
It is preferable to select and use those within the range as appropriate.

When a material having a dynamic spring constant of 200 × 10 ⁶ N / m ³ or more and a loss coefficient of 0.2 or less is used, desired sound insulation performance cannot be obtained, and a dynamic spring constant of 50
It is not preferable to use a material having a loss coefficient of 0.5 or more with a density of 10 ⁶ N / m ³ or less, because the sinking amount of the flooring material increases.

When a foamed rubber is used as the viscoelastic material (3), it is preferable to use one having a thickness of about 1 to 3 mm. When the thickness is 1 mm or less, the desired dynamic spring constant and loss coefficient cannot be obtained, and 3 mm
The above case is not preferable because the sinking amount increases.

Examples of the fibrous material (5) having a buffering property used in the present invention include inorganic fibrous materials such as rock wool and glass wool, synthetic fibrous materials made of nylon, polyethylene, polyester, acrylic, rayon, and the like. And non-woven fabrics made of natural fibers such as cotton and cotton, among which the dynamic spring constant is 1 to
It is preferable to appropriately select and use those in the range of 20 × 10 ⁶ N / m ³ . Dynamic spring constant is 20 × 10
^{When it is 6} N / m ³ or more, the desired sound insulation performance cannot be obtained. When the dynamic spring constant is 1 × 10 ⁶ N / m ³ or less, the amount of sinking of the flooring material is large and the walking feeling is poor. It is not preferable because it becomes worse.

The wooden soundproof flooring material of the present invention is obtained by forming the above-mentioned cutting grooves (2) and (3) on the back surface of an inverted plywood (1) provided with a wooden veneer veneer on the surface. The viscoelastic material (4) and the fibrous material (5) can be formed by sequentially laminating the viscoelastic material (4) and the fibrous material (5) by a known method such as a cooling bonding method. Can also be formed by laminating an adhesive-composite layer on the inverted plywood (1).

[0020]

As described above in detail, the wooden soundproof flooring material of the present invention has an inverted plywood adjusted to have a predetermined bending rigidity by a cutting groove, a viscoelastic material having a vibration damping property, and a cushioning property. Since it is made by combining with a fiber-based material, it is possible to design various performances as a wooden soundproof floor material in a well-balanced manner.

That is, in the present invention, the rigidity of the wooden board is reduced, and the rigidity of the entire floor is reduced by sticking the viscoelastic material and the fibrous material. Is to make it easier,
Due to this deformation, impact performance is imparted to the floor material, and the natural frequency and impact force inherent to the impact source are reduced, so that floor impact sound can be reduced. Further, the wooden soundproof flooring material of the present invention has a simple configuration as described above, so that it can be manufactured with good productivity and at low cost.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The soundproof flooring material of the present invention will be described below in detail with reference to examples, but the present invention is not limited thereto.

Embodiment 1 The groove width is 2.4 on the back surface of the 9 mm-thick inverted plywood (1).
mm, groove depth 7.0mm, long side direction 5
The short side direction was provided at an interval of 35.0 mm at intervals of 0.5 mm. When the flexural rigidity of this wooden board was measured, it was 5.44 × 10 ³ kg · cm ^{2 in} the long side direction and 3.36 × 10 ³ kg · cm ² in the short side direction.

On the back surface of the wooden board, a viscoelastic material (4) having a thickness of 1.0 mm and a dynamic spring constant of 18
An acrylic rubber sheet having 4.07 × 10 ⁶ N / m ³ and a loss coefficient of 0.43 was adhered, and then a fiber material (5) having a thickness of 3.66 mm and a dynamic spring constant of 11.58 ×
A 10 ⁶ N / m ³ polyester nonwoven fabric was adhered to produce a wood-based soundproof flooring material of the present invention.

When the floor impact sound level of the obtained wooden soundproof flooring material was measured based on the measuring method of JIS A1418, the sound insulation rating for light floor impact sound was L47 and the sound insulation rating for heavy floor impact sound was L56. When a load of 1 kg · cm ² was applied to the upper surface of the obtained wooden soundproof flooring material, the amount of sinking of the flooring material was measured, and it was 2.4 mm.

Comparative Example 1 A wooden board was produced in exactly the same manner as in Example 1 except that a regular plywood was used as the wooden board. When the bending rigidity of this wooden board was measured, the long side direction was 6.79 × 10 ³ k
g · cm ² , 2.39 × 10 ³ kg · cm ^{2 in the} short side direction
Met. A viscoelastic material and a fiber-based material were adhered to the back surface of the wood board in the same manner as in Example 1 to produce a wood soundproof flooring material of the present invention.

When the floor impact sound level of the obtained wooden soundproof floor material was measured by the same measuring method as in Example 1, the sound insulation grade for light floor impact sound was L46 and the sound insulation grade for heavy floor impact sound was L58. Was. Further, the sinking amount of the above-mentioned wooden soundproof flooring material was measured in the same manner as in Example 1, and it was 3.3 mm.

Comparative Example 2 On the back surface of the inverted plywood having a thickness of 12 mm, a long side direction and a short side direction cutting grooves are formed at a depth of 6.0 mm,
Except that the cutting grooves in the long side direction were provided at intervals of 66.5 mm,
A wooden board was produced in exactly the same manner as in Example 1. When the bending stiffness of this wooden board was measured, the long side direction was 45.
81 × 10 ³ kg · cm ² , 5.60 × 10 in the short side direction
^{It was 3} kg · cm ² . A viscoelastic material and a fiber-based material were adhered to the back surface of the wood board in the same manner as in Example 1 to produce a wood soundproof flooring material of the present invention.

When the floor impact sound level of the obtained wooden soundproof flooring material was measured by the same measuring method as in Example 1, the sound insulation grade for light floor impact sound was L55 and the sound insulation grade for heavy floor impact sound was L60. Was. In addition, the amount of sinking of the wooden soundproof flooring material was measured in the same manner as in Example 1, and was 1.9 mm.

Comparative Example 3 Except not using the viscoelastic material (4), a wooden soundproof flooring material was produced in exactly the same manner as in Example 1. When the floor impact sound level of the obtained wooden soundproof flooring material was measured by the same measuring method as in Example 1, the sound insulation class with respect to the lightweight floor impact sound was L5.
1. The sound insulation rating against heavy floor impact noise was L56.
Further, the amount of sinking of the wooden soundproof floor material was measured in the same manner as in Example 1, and was 2.2 mm.

Comparative Example 4 A 0.8 mm thick, dynamic spring constant of 21 between a 2.5 mm thick plywood and a 9.0 mm thick plywood.
A composite plate was prepared by laminating acrylic rubber sheets each having 3.60 × 10 ⁶ N / m ³ and a loss coefficient of 0.13.

On the back surface of the composite plate (on the side of the plywood having a thickness of 9.0 mm), the groove width is 2.4 mm and the groove depth is 9.0 m.
m cutting grooves were provided at intervals of 66.5 mm only in the long side direction. When the bending rigidity of this composite plate was measured, the long side direction was 9.38 × 10 ³ kg · cm ² , and the short side direction was 7.38 × 10 ³ kg · cm ² .
It was 80 × 10 ³ kg · cm ² . On the back surface of the composite plate, the thickness is 5.04 mm and the dynamic spring constant is 9.54 ×
A 10 ⁶ N / m ³ nonwoven fabric was adhered to produce a wood-based soundproof flooring material.

The floor impact sound level of the obtained wooden soundproof flooring material was measured by the same measuring method as in Example 1.
The sound insulation rating for light floor impact sound was L47, and the sound insulation rating for heavy floor impact sound was L58. Further, the amount of sinking of the above-mentioned woody soundproof flooring material was measured in the same manner as in Example 1, and it was 2.9 mm. Table 1 shows the manufacturing conditions and test results of Example 1 and Comparative Examples 1 to 4, and the ratio of the manufacturing price of Comparative Examples 1 to 4 to Example 1. here,
The production price ratio is a value calculated by setting the first embodiment to 100.

[0034]

[Table 1]

From the results of Comparative Example 1 in Table 1, it can be seen that the case where the plywood of the sized plywood was used as the wooden board had a large sinking amount and was inferior to the plywood of the inverted plywood in terms of durability and walking ability. confirmed. In addition, from the results of Comparative Examples 2 and 3, it is found that a wooden soundproof flooring material having a large flexural rigidity and a wooden soundproofing flooring material not laminated with a viscoelastic material have a poor sound insulation performance against a light floor impact sound and are practically used as a wooden soundproofing flooring material. The lack of sex was confirmed.

Further, from the results of Comparative Example 4, the wood-based sound-insulating flooring obtained by laminating a cushioning material having a small dynamic spring constant on the back surface of the composite plate having the vibration damping sheet interposed therebetween is the same as the wood-based soundproofing flooring of the present invention. Although it has the same sound insulation performance, it was confirmed that the sinking amount was large and the manufacturing cost was high.

From the above results, it is possible to produce a wood-based sound-insulating floor material by combining an inverted plywood whose bending stiffness is adjusted by a cutting groove, a viscoelastic material having a vibration damping property, and a fibrous material having a damping property. It has been found that various performances such as sound insulation performance, sinking amount, durability and the like as a wooden soundproof flooring material can be designed in a well-balanced manner. The test method used in this example is shown below.

[Bending Rigidity Test] A test piece having a width of 50 mm and a length of 600 mm was used, and a test was performed by applying a load of 2 kg to the test piece. [Dynamic spring constant and loss coefficient] Based on JIS-A-6321. [Sinking amount] A diameter of 10 mm was set at the center of the specimen having a width and length of 600 mm.
A loading plate having a weight of 1 kg / cm ^{2 and} a thickness of 0 mm was placed thereon, and the amount of parallel displacement of the wooden soundproof floor was measured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the wooden soundproof flooring material of the present invention cut in a short side direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inverted plywood 2 ... Cutting groove in the long side direction 3 ... Cutting groove in the short side direction 4 ... Viscoelastic material 5 ... Fiber material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04F 15/18 602 E04F 15/18 602H (72) Inventor Mitsuharu Kimura 2-8-1 Iidacho, Iwakuni-shi, Yamaguchi Prefecture Sanyo-kuni pulp (56) References JP-A-63-308153 (JP, A) JP-A-4-47043 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04F 15/04 -15/04 601 E04F 15/18 601-602

Claims (3)

(57) [Scope of request for utility model registration] 1. A reverse plywood provided with a wood veneer veneer on its front surface has cutting grooves in the long side direction and the short side direction of the reverse plywood, respectively. A wooden soundproof flooring material in which a viscoelastic material having vibration damping properties and a fibrous material having cushioning properties are sequentially laminated, wherein a bending rigidity in a long side direction of the inverted plywood is 1 to 10 × 10 ³ kg.
・ Cm ² and bending rigidity in the short side direction is 1
A wood-based sound-insulating flooring material having a weight of up to 5 × 10 ³ kg · cm ² . 2. The viscoelastic material has a dynamic spring constant of 50 to 20.
The wooden soundproof flooring material according to claim 1, wherein 0 x 10 ⁶ N / m ³ and a loss coefficient are 0.2 to 0.5. 3. The dynamic spring constant of the fiber material is 1 × 20 ×
10 ⁶ N / ^{m 3} woody sound-insulating floor member according to claim 1 or 2.