JPH0719475U - Soundproof floor board - Google Patents

Abstract

(57) [Summary] [Purpose] To provide floorboards used on the floors of detached houses with soundproof performance that reduces the amount of sinking due to the load from the floor. [Structure] A substrate (4) having a surface irregularity (5) formed on the lower surface of a surface plate (2) having a decorative layer (1) formed on the surface thereof with a damping material (3) interposed therebetween. A sound-insulating floor board that is adhered and uses a foamed synthetic resin mixed with latex as the damping material (3).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a soundproof floor board for a detached floor.

[0002]

[Prior art]

 As for the floors above the floor in a detached house with two or more floors, a floorboard made of decorative plywood with a thickness of about 15 mm is directly applied on the joists with nails or adhesives, and the impact sound from the top surface of the floorboard is directly Although it propagated downstairs (when a light-duty floor impact test performed on a concrete floor slab was conducted on a detached house, the sound insulation rating was about L-80), it was not seen as much of a problem as an apartment house.

[0003]

[Issues to be solved by the device]

 However, recently, due to changes in user needs, noise on the upper floors of detached houses has been suddenly noticed, and soundproof floor boards for upper floors of detached houses that have the same soundproofing performance as floorboards for direct-attachment for apartment houses. Is required. In order to meet this requirement, a soundproof floorboard has been proposed in which laminated plywood is laminated on the lower surface of a relatively thin decorative plywood via a damping material made of foamed synthetic resin. Since it is only foamed as it has, there was a problem that sinking easily occurred under the load from the floor.

[0004]

[Means for Solving the Problems]

 This invention was devised in order to solve the above-mentioned problems, and a substrate having a concavo-convex part for bonding is attached to the lower surface of a surface plate having a decorative layer formed on the surface through a damping material. A soundproof floorboard that is worn, characterized in that a foamed synthetic resin in which latex is mixed is used as the damping material.

The present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a soundproof floor plate, 1 is a decorative layer, 2 is a surface plate, 3 is a vibration damping material, 4 is a substrate, and 5 is an unevenness for joining.

As the surface plate 2, a plywood plate having a thickness of about 2.5 to 3 mm, a single plate laminated material, a wood chip molding plate, a fiber board, or the like is used, and the decorative layer 1 is provided on the surface thereof. As the decorative layer 1, a natural wood decorative veneer, a reinforced decorative paper, a synthetic resin sheet, or the like is used, but the upper surface of the front plate 2 may be directly adhesively colored.

On the lower surface of the surface plate 2, a damping material 3 having a thickness of about 1 to 2 mm in which latex is mixed in a foam synthetic resin is attached. As the foamed synthetic resin, a synthetic resin such as polyurethane, polyester, polystyrene or polyethylene is used, and a low foamed resin having a foaming ratio of 2 to 10 times is preferably used. If the foaming ratio is too high, the cushioning property will be high, but on the other hand, the sinking due to the load from the top of the floorboard will be severe, and if the foaming ratio is too low, the cushioning property will be impaired and the sound insulation performance will be deteriorated.

The mixing ratio of the latex to the synthetic resin is preferably about 10 to 30% by weight, and if it is 10% or less, the rubber viscosity is insufficient and the sinking is not improved. On the other hand, if it exceeds 30%, the rubber becomes hard due to an increase in rubber viscosity, resulting in poor sound insulation performance and high cost. Aqueous vinyl urethane, latex-modified urea resin, etc. are used as the adhesive.

On the lower surface of the vibration damping material 3, a substrate 4 having a concavo-convex portion 5 for bonding formed on its peripheral portion is attached. As the substrate 4, plywood having a thickness of about 9 to 15 mm, laminated veneer, wood piece molding plate, fiber plate, or the like is used. Then, in order to improve the workability, the concavo-convex portion 5 (commonly called actual) is formed on the peripheral portion thereof. Since the unevenness 5 is formed on the peripheral portion of the substrate 4, if the damping material 3 and the surface plate 2 are formed, a step may occur between the floor boards due to the damping material 3 when a load is applied from the top surface of the floor board. Therefore, caution is required.

[0011]

[Action]

 According to this invention, since the latex is mixed in the foamed synthetic resin that constitutes the vibration damping material, the rubber viscosity of the latex is added to the synthetic resin film that forms the foamed layer, and the conventional simple foaming method is used. Compared with a foamed synthetic resin film, the foamed layer is less likely to be crushed.

An embodiment of the present invention will be shown below.

[0013]

【Example】

 20% by weight of latex is mixed in polyurethane foamed resin with a foaming ratio of 5 times on the lower surface of a surface plate made of plywood with a thickness of 2.5 mm with a 0.3 mm thick decorative veneer attached to the surface. A substrate made of plywood having a thickness of 12 mm and having a concavo-convex portion for bonding formed on the peripheral portion thereof was attached via a damping material having a thickness of 1.5 mm to obtain a desired soundproof floorboard.

As a comparative example, an ordinary floorboard made of a 15 mm thick plywood with a 0.3 mm thick decorative veneer attached to the surface was prepared, and a soundproof floorboard and a detached 2 After constructing the floor joists with nails and adhesives, a tapping machine was used to generate a lightweight floor impact sound from the top of the floorboard, and measurements were taken downstairs. As a result, as shown in FIG. 2, the conventional floorboard was L-76, and the soundproof floorboard according to the embodiment of the present invention was L-69. In addition, when actually walking on the floor surface, the sinking was relatively small and the walking feeling was good.

From this, it is understood that the soundproof floorboard according to the present invention has a simple structure, but can provide sound insulation performance similar to the soundproof floorboard of an apartment house as compared with the conventional floorboard.

[0016]

[Effect of device]

 According to this invention, by using a floor board having soundproofing performance on the floor of a detached house, it is possible to block the noise on the floor and live a comfortable life. In addition, since latex is mixed in the foamed synthetic resin as a damping material, the rubber viscosity of the latex is added to the film of the synthetic resin that forms the foamed layer, and compared with the conventional foamed synthetic resin that is simply foamed. The layer is less likely to be crushed easily, and the elastic recovery is also improved. Therefore, the sound insulation performance is maintained and the sinking is less likely to occur even if a load is applied from the floor surface.

[Brief description of drawings]

FIG. 1 is a sectional view of the soundproof floorboard of the present invention.

[Figure 2] Sound insulation class test results

[Explanation of symbols]

 1 Decorative layer 2 Surface plate 3 Damping material 4 Substrate 5 Concavo-convex for joining

Claims (1)

[Scope of utility model registration request] 1. A substrate (4) having a bonding surface (2) on the surface of which a decorative layer (1) is formed, and on the lower surface of which a concave and convex portion (5) for bonding is formed via a damping material (3). ) Is affixed to the soundproofing floorboard, wherein the damping material (3) is a synthetic foamed resin in which latex is mixed.