JP2591336Y2 - 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 directly-attached wooden sound-insulating floor material to be directly attached to a concrete floor slab of an apartment house.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional wood-based directly bonded floor material has a cushioning property on a lower surface of a decorative plywood or the like having a thickness of about 12 mm with a decorative sheet adhered to the surface.
Generally, a sheet made of a foamed synthetic resin having a thickness of about 0 to 4.0 mm is adhered, and the cushion sheet on the back of the base material absorbs irregularities on the concrete floor slab surface and improves walking feeling. Had an effect.

[0003]

[Problems to be solved by the invention] However, the effect of preventing the propagation of noise generated from the upper surface of the floor material could hardly be expected. Therefore, the desired soundproofing performance can be achieved by interposing a foamed rubber sheet or the like between the wooden base materials or attaching a cushioning material in which a plurality of foamed synthetic resin sheets having different expansion ratios are laminated on the lower surface of the wooden base material. Various measures have been taken to achieve this, but as a result, the floor material partially sinks due to the load from the floor material upper surface, and there are problems such as fluffy and uncomfortable feeling when walking when walking. Had occurred.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a vibration-damping method comprising a resin-impregnated fiber-based sheet impregnated with a rubber-based resin on the lower surface of a wooden decorative base material 2 having a decorative sheet 1 adhered to the surface. A wood intermediate substrate 5 having a plurality of grooves 6 formed thereon is adhered via a material 4, and irregularities are formed on both surfaces on a lower surface thereof .
And the ground contact area with the woody intermediate substrate 5
It is characterized in that a cushioning material 7 made of a foamed synthetic resin larger than the ground area is attached.

Hereinafter, the present invention will be described in detail with reference to the drawings. The wood base material 3 is a wood base material 2 made of plywood, MDF (medium specific gravity fiber board), LVL (single veneer laminate), LVB (single veneer laminate) having a thickness in the range of 2.5 to 5.0 mm. The decorative sheet 1 such as a natural wood decorative veneer, a vinyl chloride resin sheet, a thin paper, etc., having a thickness of 0.1 to 1.0 mm is adhered to the surface thereof through a common adhesive.

When the wooden substrate 2 is thin and easily warped, a sheet-like material equivalent to the decorative sheet 1 adhered to the front surface may be adhered to the back surface as a backer material. It should be noted that when using a decorative veneer veneer as the decorative sheet 1, it is important to balance the stress by unifying the fiber directions of the veneer veneer veneers adhered to the front and back surfaces.

[0007] As the rubber-based resin, butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, butyl rubber, urethane rubber, acrylic rubber, and the like are used. You may. The impregnation rate is 220 to 250 g / m ^2, which is sufficient to slightly increase the hardness of the fibrous sheet material.

A woody intermediate base material 5 having a groove 6 cut is attached to the lower surface of the vibration damping material 4 via a common adhesive. Plywood, LVL, or LVB is preferable as the base material in order to impart flexibility by cutting the groove 6. As a thickness of 5.0 to
It is in the range of 9.0 mm. The groove 6 is made of the woody intermediate substrate 5.
May be cut so as to cut completely, may be cut halfway, and the cutting direction is not limited.

A cushioning material 7 is adhered to the lower surface of the wooden decorative base material 5. As the cushioning material 7, a foamed synthetic resin sheet having irregularities of different shapes formed on both surfaces is used. As the foamed synthetic resin, a polyurethane resin, a polystyrene resin, a polyvinyl chloride resin, a polyester resin, or the like, and a material having a foaming ratio of 20 to 30 and a thickness of 8.0 to 10 mm is used.
What was heat-pressed to 5.0 mm is used.

[0010] In this case, the irregular shape is arbitrary, but the ground contact area with the wooden intermediate base material 5 is changed to the ground contact surface with the floor base.
Use a product larger than the product . In addition, at least 50
It is preferable to be within the range of 80%. If the contact area is too small, sinking is likely to occur, and if it is too large, the soundproofing performance is reduced.

[0011]

According to the present invention, the fiber sheet is impregnated with the rubber resin, so that the sink due to the grape weight applied from the floor can be reduced and the thickness can be restored more quickly than the foam. A high level of noise isolation can be maintained.

[0012] Also, since grooves are formed in the woody intermediate base material,
The floor material is given flexibility and adapts to the unevenness of the groundwork. Even after construction, it can form a horizontal floor surface, and an air layer is formed inside the groove to exhibit a soundproofing effect.

[0013] Further, the unevenness is formed on both sides and the wood is formed.
The ground contact area with the intermediate material is larger than the ground contact area with the floor base.
By attaching a cushioning material made of foamed synthetic resin
The initial stage of the impact load from the floor top is large with the wooden intermediate substrate.
Because it is received in a large contact area, the sinking amount is small and when walking
The floor feels hard and there is little discomfort, and the impact
After passing through a small part of the contact area, it is relaxed and soundproof
Performance can be sufficiently maintained.

[0014]

Example: 0.3 m thick on the surface of a 2.5 mm thick plywood
m natural wood decorative veneers are adhered in a uniform fiber direction, and styrene-butadiene rubber is sprayed on the lower surface of the 1.0 mm thick polyester fiber with a spray device.
g / m ² , and the surface layer was stuck with a damping material impregnated and cured, and a plywood having a thickness of 5.0 mm was stuck on the lower surface of the damping material. The grooves are cut in parallel to the short direction at regular intervals of about 100 mm, and a 8.0-mm thick, 20-fold foamed polyurethane resin foam is squared on the upper surface, 70% convex area and lower surface on the lower surface. 210 ° C. upper surface with a mold plate having a circular shape and convex and concave portions with a convex area of 50%,
The lower surface was heated and pressed at 230 ° C. and 90 kg / cm ² , and a buffer material molded into a sheet having a thickness of 4.0 mm was adhered via an adhesive to obtain a desired wood-based soundproof flooring material.

Then, the obtained wood-based sound-insulating floor material having a total thickness of 13.8 mm is fixed on a concrete floor slab having a thickness of 150 mm via an epoxy resin-based adhesive, and tapping is performed from the upper surface of the wood-based sound-insulating floor material. Light impact noise was applied by a machine, the noise at each frequency was measured using a sound level meter on the lower surface of the concrete floor slab, and the sound insulation class (LL) value was obtained. The result passed L-50 as shown in FIG. Performance.

[0016]

According to the present invention, although the overall thickness can be made thinner than the conventional floor material for direct application, as shown in the test results of the examples, the sound insulation class (LL) value is lighter. It is possible to obtain a wood-based soundproof flooring material having a high soundproofing performance of L-50 as an impact sound.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the wooden soundproof flooring material of the present invention.

FIG. 2 shows the results of a sound insulation grade test of a wood-based soundproof flooring material of the embodiment by a lightweight floor impact test.

FIG. 3 is a cross-sectional view of a conventional wood-based directly bonded floor material.

[Explanation of symbols]

 3 Wooden decorative base material 4 Damping material 5 Wood intermediate base material 6 Groove 7 Buffer material

Claims (1)

(57) [Scope of request for utility model registration] 1. A vibration-damping material (4) comprising a resin-impregnated fibrous sheet-like material impregnated with a rubber-based resin on the lower surface of a wooden decorative substrate (2) having a decorative sheet (1) adhered to the surface. via a plurality of grooves (6) of wood intermediate base formed (5) it is attached on its lower surface, when forming unevenness on both surfaces
In both cases, the ground contact area with the woody intermediate substrate (5) is
A wood-based sound-insulating floor material, characterized in that a cushioning material (7) made of a foamed synthetic resin larger than the ground area is adhered.