JP3375705B2 - Wooden soundproof flooring - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a wood-based soundproof flooring material,
The present invention relates to a wooden soundproof flooring material having excellent soundproofing performance that can be directly laid on the surface of a concrete slab or the like.

[0002]

2. Description of the Related Art Laying a wooden floor material directly on a concrete slab or on a waste plywood laid on the concrete slab has been conventionally performed as so-called flooring construction. Many structures of wooden floor materials have been proposed and used from the viewpoint of soundproofing or improvement of walking feeling.

For example, as shown in FIG. 4, a wooden decorative board 4
1. A wood flooring material formed by laminating a rubber sheet 45 on the back surface of a wooden board in which the soft sheet 42, the soft sheet 42 and the substrate 43 are laminated and integrated. The front surface and the back surface are uneven, that is, a concave portion 47 whose front surface is depressed corresponding to the convex portion 46 protruding downward.
In addition, it is proposed that a protrusion 49 having a front surface protruding is formed corresponding to the recess 48 on the back surface (Japanese Patent Laid-Open No. 63-63-63).
241264).

Further, as shown in FIG. 5, a vibration-proof sheet 52 and a perforated wood plate 53 are laminated on the back surface of a wood material 51 to form a base material, and on the back surface thereof, a polyolefin foam or a rubber foam is formed. A body to which a flat cushioning material 54 is attached (see Japanese Utility Model Laid-Open No. 10-144), and as shown in FIG. 6, a vibration-proof sheet 62 and a perforated wood board 63 are laminated on the back surface of the wood material 61. To form a base material, and on the back surface thereof, a cushioning material 64 made of a rubber foam having on the back surface a projection 65 having a high foaming rate and a soft hollow interior and a projection 66 having a low foaming rate and a harder hardness. It has also been proposed to attach (see Japanese Utility Model Publication No. 5-5988).

[0005]

Among the wood-based soundproof flooring materials having the above-mentioned structure, the structure in which the substrate is provided with the kerf as shown in Japanese Patent Laid-Open No. 63-241264 has a vibration-proof property and a vibration-proof property. Although it has an advantage in that it has some excellent soundproofing properties and can follow irregularities on the concrete slab surface, there is still room for improvement from the viewpoint of soundproofing properties.

As disclosed in Japanese Utility Model Application Laid-Open No. 10-10144, the one in which a flat cushioning material is adhered to the back surface of the substrate has a flat cushioning sheet in contact with the concrete slab surface and has a wide contact area. It has the disadvantage of limited transmissibility. The above-mentioned Japanese Utility Model Laid-Open No. 5-5988 discloses a rubber foam cushioning material having protrusions having different shapes and different foaming ratios as a cushioning material to be attached to the back surface in order to eliminate the inconvenience. However, in this case, it is undeniable that it is difficult to manufacture the rubber foam cushioning material.

An object of the present invention is to eliminate the above-mentioned disadvantages of the conventional wood-based soundproof flooring materials. More specifically, it is easy to manufacture and has sufficient soundproofing properties. Moreover, the purpose is to obtain a wooden soundproof floor material that can easily follow the irregularities of a concrete slab. Another object of the present invention is to obtain a wood-based soundproof flooring material that exhibits high resistance to repeated short-term loads and long-term loads.

[0008]

In order to solve the above-mentioned problems and to achieve the object, the present invention is a wooden soundproof floor in which a surface decorative board, a wooden base material and a back cushion material are laminated and integrated. The wood-based substrate has a cut groove on its back surface, and the back cushioning material is a continuous foam type soft or semi-rigid synthetic resin sheet that is compressed by heat pressing to reduce its thickness and Disclosed is a wood-based soundproof flooring material having a large number of protrusions formed on both sides.

In a preferred embodiment of the present invention, the wood base material has a sheet having a buffer function as an intermediate layer, and the kerf formed on the back surface passes through the sheet having the buffer function. As a result, the sound insulation effect, particularly, the sound insulation effect against the impact sound is improved together with the improvement of the cushioning property.

Further, the wood material located below the cushioning sheet may be a perforated material having a large number of through holes, which also improves the sound insulation effect. The continuous foaming type soft or semi-rigid synthetic resin sheet as the material of the back cushioning material may be a continuous foaming sheet of polyurethane, vinyl chloride, polyvinyl alcohol, polyvinyl acetate, etc., and polyurethane is a particularly preferable material. .

[0011]

[Working] The back cushioning material used for the wood-based soundproof flooring material according to the present invention is a continuous foaming type soft or semi-rigid synthetic resin sheet that is heat-compressed by a hot plate press having an embossing, or a sheet with a punching plate. It is possible to easily manufacture by heat-compressing with a flat plate-shaped hot plate press with both surfaces sandwiched, or by any other method. In addition, since the material is a continuous foam type soft or semi-rigid synthetic resin sheet, the protrusions formed on the front and back surfaces can have a clear contour shape and a high height, resulting in sound insulation and sound insulation. Will be good. Furthermore, by being heat-compressed as a whole and having a low-density layer part that is a protrusion and a high-density layer part other than that, in addition to reducing the propagation of vibration from the upper part to the lower part, repeated short-term load or long-term load It exhibits high resistance to any load and does not cause deterioration of sound insulation and sound insulation over a long period of time. Further, by forming the kerf on the wood-based material, the unevenness on the surface of the concrete slab is well followed, and it is possible to prevent lifting and the like.

[0012]

The present invention will be described in more detail based on the following examples. FIG. 1 shows an example of a wooden soundproof flooring material according to the present invention. In the figure, reference numeral 1 denotes a surface decorative board, a wood-based base material 2 is laminated on the back surface thereof, and a back surface cushioning material 4 is further laminated on the back surface thereof to be integrated to form a wood-based soundproof floor material 10. To be done.

As the surface decorative board 1, any one used for a conventionally known wood-based soundproof flooring material such as a decorative veneer or a laminated laminated veneer on a decorative veneer can be arbitrarily used. Further, although not particularly shown, a groove may be provided in the longitudinal direction or the lateral direction. Its thickness is 0.3mm-3.0mm
Something is usually used. The wood-based material 2 is plywood,
It may be MDF (medium quality fiberboard), particle board, etc. In this embodiment, one plywood is used. The thickness thereof is usually 6.0 mm to 9.0 mm. In the present invention, the wood-based substrate 2
A plurality of kerfs 3 that do not penetrate are provided at a predetermined interval from the back surface to the front surface side. The kerfs 3 are provided mainly for the purpose of reducing the rigidity of the wood-based material 2, and may be provided in the longitudinal direction, the lateral direction, or both directions thereof. Moreover, the space | interval is 10 mm-30 mm.
The width may be about 1.0 mm to 3.0 mm, and the depth is preferably about 60 to 70% of the thickness of the wooden base material 2.

The wood-based base material 2 is the wood-based soundproof floor material 1.
It may be a single piece over 0, or may be a plurality of small pieces gathered together and accumulated in a predetermined size. The backside cushioning material 4 is, for example, a polyurethane foam sheet having a required thickness, which is heat-compressed by a hot platen press having a large number of embosses, or a flat plate-like hot platen press in which the foamed sheet is sandwiched by punching plates. It can be easily molded by thermal compression in the thickness direction. Simultaneously with the molding, a large number of protrusions 5 and 6 are simultaneously molded on both front and back surfaces, and the polyurethane foam sheet is compressed between the portion where the front surface side projection 5 and / or the rear surface side projection 6 is present and the portion where such a projection is not present. Due to the different rates, it has a low-density layer and a high-density layer. Due to the formation of the protrusions, the propagation of vibrations from the upper side to the lower side is reduced, and as will be described later, it shows high resistance to both repeated short-term loads and long-term loads, and the sound insulation performance and sound insulation performance deteriorate over a long period of time. Does not cause. Further, since the shape of the projection is sharp and the surface is a flat surface, the adhesion to the wood-based material is also improved.

The amount of compression of the polyurethane foam sheet in the hot plate press, the size and number of the projections formed on the front and back surfaces, etc.
Although it can be appropriately determined according to the use environment of the wooden soundproof flooring 10 as a product, according to the experiments by the present inventors, the expansion ratio is 2
A polyurethane foam sheet having a thickness of 0 to 40 and a thickness of 8 mm to 10 mm is compressed to a size of 5 mm to 6 mm as a whole, and a height of 1 mm to 3 mm on the front and back surfaces thereof.
500 protrusions / m with an average diameter of 8 mm to 10 mm
If it is provided at a ratio of about ^2, it is possible to sufficiently exert the sound insulation effect as well as the cushioning effect, and since it is a polyurethane foam sheet that is compressed as a whole, it is high against both repeated short-term load and long-term load. I have found that it can also show resistance and reduce the occurrence of so-called "fatigue". The shape of the protrusion is not particularly limited,
Any shape such as a circle, a rhombus, a triangle, and a quadrangle is possible.

The following wooden soundproof floor material 10 was actually prepared. That is, a 0.3 mm thick oak veneer was used as the surface decorative material 1, and four 5-ply plywood boards of 75 mm x 900 mm with a thickness of 9 mm were used as the wood-based base material 2 by using hot melt in a geese type. 15mm on the back of the thing
A pitch 6 mm deep and 2 mm wide cut groove 3 was engraved, and a polyurethane foam sheet with a foaming ratio of 30 and a thickness of 10 mm was further pressed as a back cushioning material 4 by hot pressing with a hot platen press having embossing to 6 mm. A wood-based soundproof flooring material 10 was prepared by using those having a thickness of 500 mm / m ² protrusions having an average diameter of 10 mm and a height of 2 mm formed on the front and back surfaces, and laminating and integrating them.

When this wood-based soundproof flooring material 10 is laid on the surface of the concrete slab, the rigidity of the whole wood-based soundproofing floor material is lowered due to the formation of the cut grooves 3 on the back surface of the wood-based base material 2. During construction, it was possible to follow the irregularities on the surface of the concrete slab and to lay it in close contact. After laying, according to the test specified in JIS A1418, an impact was applied to the surface decorative plate, and a light weight floor impact sound was measured downstairs, and it passed L-50. The results are shown in Table 1 (A). 2k
After a load of g / cm ² was repeatedly applied at 0.1 Hz for 48 hours, the lightweight floor impact sound was similarly measured and still passed L-50. Also,
After continuously applying a load of ² kg / cm ² for 48 hours,
Similarly, when the lightweight floor impact sound was measured, it was still L-5.
It passed 0. This means that the backside cushioning material compressed by the hot press has sufficient resistance to short-term repetitive loading as well as long-term loading, and so-called "settling" does not occur. It is presumed that the change in physical properties was small.

After the test, the adhesive surface (the surface of the protrusion) between the wooden base material and the back cushion material was observed, but no peeling occurred. FIG. 2 shows another embodiment of the wooden soundproof flooring material 10 according to the present invention. This is different from the wooden soundproofing floor material described with reference to FIG. 1 in the structure of the wooden base material. That is, the wood-based base material 20 in this embodiment includes a first wood-based material 21 forming an upper layer, a cushioning sheet 22 laminated on the back surface thereof, and a second wood-based material laminated on the back surface thereof. 23 and 23 are laminated and integrated.

As the first wood-based material 21, plywood, M
It may be DF (medium quality fiberboard), particle board, etc. In this embodiment, one plywood is used, and its thickness is usually about 2.0 mm to 4.0 mm. To be The cushioning sheet 22 is provided for the purpose of absorbing shock, and is made of synthetic rubber, synthetic resin foam sheet,
A material such as non-woven fabric is effective, and its thickness is usually 1 m.
It is about m to 2 mm.

The second wood-based material 23 may be composed of the same material as the first wood-based material 21, and its thickness is usually 4 m.
The thing of about m-6 mm is used. A large number of openings 24 having a diameter of about 10 mm are formed in the second wood-based material 23. On the back surface of the wood-based material 20, as in the case of the wood-based material 2 shown in FIG.
As shown in FIG. 2, it is formed by passing from the second wood-based material 23 through the cushioning sheet 22 and extending to the middle of the first wood-based material 21.

A wood-based soundproof flooring material having the above-mentioned wood-based base material 20 was actually prepared and the same experiment as above was conducted. In addition,
As the surface decorative board 1 and the back cushioning material 4, the same materials as in the case of the wood-based soundproof flooring material 10 shown in FIG. 1 were used. The wood-based material 20 has a thickness of 4 mm as the first wood-based material.
4 ply plywood, a rubber sheet having a thickness of 1 mm as a cushioning sheet, and a perforated material obtained by forming a large number of holes having a diameter of 10 mm in a 5 ply plywood having a thickness of 4 mm is used as a second wood-based material. After laminating and integrating them, from the back side to the front side, the pitch is 15 mm, the depth is 6 mm, and the width is 2 m.
A cut groove 31 of m was engraved.

When the wooden soundproof flooring material having the above-mentioned structure was laid on the concrete slab surface in the same manner as in the above-mentioned embodiment, the unevenness of the surface was well followed. In addition, when a lightweight floor impact sound specified in JIS A1418 was measured, it passed L-45. The results are shown in Table 1 (B). Further, similarly, after repeatedly applying a load and after applying a long-term load, the lightweight floor impact sound was measured and still passed L-45.
It was also confirmed that the shock absorption was good.

Next, the wood base material 2 described with reference to FIG.
In No. 0, the one in which the kerf 31 was formed only in the portion of the second wood-based material 23 (that is, the one having the kerf that did not pass through the cushioning sheet 22) was prepared, and the same test as described above was conducted. . The lightweight floor impact sound in this case passed L-50. The results are shown in Table 1 (C). This is because when the cushioning sheet 22 is cut, the impact sound generated on the surface of the flooring material is independently transmitted at each part separated by the kerf,
It is thought that this is due to the decay.

[0024]

[Table 1]

From the above tests, the wood-based soundproof flooring material according to the present invention was subjected to the hot plate pressing with the embossing of the continuous foaming type soft or semi-rigid synthetic resin foamed sheet such as the foamed sheet of polyurethane as the back cushioning material. Heat compression,
By using a material that is compressed by a flat-plate hot plate press while sandwiched between punching metals, its manufacture becomes easy, and the back surface cushioning material has a large number of well-defined contours on both front and back surfaces. Since it has the protrusions, the propagation of vibration from the upper side to the lower side is reduced. In addition, the heat-pressed polyurethane foam sheet, which has a low-density layer and a high-density layer, exhibits high resistance to repeated short-term loads and long-term loads, resulting in deterioration of sound insulation performance and sound insulation performance over a long period of time. Does not cause. Further, by forming the cut groove in the wood-based material, it is possible to well follow the irregularities on the surface of the concrete slab at the time of laying, and to prevent the occurrence of lifting or the like.

In the wood-based soundproof flooring material according to the present invention, a synthetic resin sheet may be attached to the back surface of the back surface cushioning material in a state of being bonded only to the tips of the protrusions.
This can prevent moisture on the concrete slab surface from reaching the wood-based base material of the floor material. Also, when adhering to the concrete slab surface via an adhesive, the adhesive enters the concave part of the back surface cushioning material and reduces the sound insulation performance,
The effect that the sound insulation performance is not deteriorated by the adhesive permeating into the back surface cushioning material and hardening is exerted.

[0027]

As is apparent from the above description, the wood-based soundproof flooring material according to the present invention is easy to manufacture, and is obtained by thermally compressing a continuous foaming type soft or semi-rigid synthetic resin foamed sheet as a whole. The back surface cushioning material having the protrusions having a clear shape on both front and back surfaces and having the low-density layer portion and the high-density layer portion reduces the propagation of vibration from the upper side to the lower side and reduces the sound insulation property. The soundproof property is improved, and the effect is maintained for a long period of time. Furthermore, the sound insulating property is improved because the surface of the concrete slab is well followed and no floating occurs even when laying.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view showing an embodiment of a wooden base material.

FIG. 4 is a cross-sectional view showing an example of a conventionally known wooden soundproof flooring material.

FIG. 5 is a cross-sectional view showing another example of a conventionally known wooden soundproof floor material.

FIG. 6 is a cross-sectional view showing still another example of a conventional wooden soundproof floor material.

[Explanation of symbols]

10 ... Wood-based soundproof flooring material, 1 ... Decorative board, 2 ... Wood-based base material, 3 ... Grooves, 4 ... Back cushioning material, 5 ... Front side projection, 6 ...
Back side protrusion

Continuation of the front page (56) Reference JP-A-1-244838 (JP, A) JP-A-64-36444 (JP, A) JP-A-64-1857 (JP, A) Jitsukaihei 2-87852 (JP , U) Actual flat 3-120735 (JP, U) Actual flat 4-132140 (JP, U) Actual flat 5-3468 (JP, U) Actual flat 6-12635 (JP, U) Actual flat 6-44933 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04F 15/04 601 E04F 15/18 602

Claims (2)

(57) [Claims] 1. A wood-based soundproof floor material obtained by laminating and integrating a surface decorative board, a wood-based base material, and a backside cushioning material, wherein the wood-based base material is a first wood-based material constituting an upper layer, and
A sheet with a cushioning function that is laminated on the back side, and on the back side
It is constructed by laminating and integrating a second wood-based material to be laminated.
And pass through a sheet that has the cushioning function
A kerf is formed on the back side, and the back side cushioning material is a continuous foam type soft or semi-rigid synthetic resin foam sheet that is thinned by compression with a hot press and at the same time has many projections formed on both front and back sides. A wood-based soundproof flooring that is characterized by being present. 2. The wood soundproof flooring material according to claim 1, wherein the second woody material is a perforated material having a large number of through holes formed therein.