JPH0514994Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sound-insulating wooden flooring material suitable for direct construction on concrete flooring materials and a method for manufacturing the same.

[Prior Art] It has recently become common practice to apply wood-based flooring materials directly to concrete floor surfaces. However, this type of concrete directly attached flooring has poor sound insulation properties, so
A thick cushioning material was pasted on the back side of the wooden flooring to improve sound insulation. However, when thick cushioning material was applied, a new drawback arose: the floor material sank when walking, making it uncomfortable to walk on.

[Problems to be Solved by the Invention] The purpose of this invention is to eliminate the above-mentioned drawbacks and provide a flooring material that has excellent sound insulation properties and is comfortable to walk on.

[Means for solving the problem] This invention is a flooring material in which a cushioning material of approximately the same shape as the base material is pasted on the back side of a base material whose four circumferential sides have been actually processed. The present invention relates to a sound-insulating wood-based flooring material in which a cushioning layer is formed by abutting a material and a cushioning material with a small expansion ratio.

Hereinafter, the present invention will be explained in detail with reference to the drawings. In Figs. 1 to 3, 1 is a wooden board, and a sheet 2 having sound insulation, vibration damping, or buffering properties, a perforated wooden board 3, and a cushioning material 4 are laminated in order on the back side of this wooden board 1. . This cushioning material 4 includes a cushioning material 4a having a large expansion ratio as shown in FIG.
It is constructed by abutting against a cushioning material 4b having a small expansion ratio. By combining foams with a high foaming ratio and foams with a low foaming ratio in this way, it is possible to prevent the sound-insulating floor material from sinking.

Examples of the wood board 1 include plywood, particle board, hardboard, LVL (parallel plywood), etc., and the surface is decorated by pasting precious wood veneer, decorative synthetic resin sheet, or painting. A layer may be formed.

The thickness of the wooden board 1 is preferably 2.5 to 4.0 mm, but is not limited to this.

The sheet 2 attached to the back surface of the wooden board 1 is a sheet having sound insulation, vibration damping, or buffering properties.
Examples of sound insulation or vibration damping sheets include PVC sheets containing powdered lead, rubber sheets filled with inorganic powder, and PVC sheets, and those with a thickness of 0.8 to 2 mm are preferable.
Not limited to these. Further, the cushioning sheet may be any sheet having cushioning properties such as rubber foam or olefin foam, and preferably has a thickness of 1 to 2 mm.

The perforated wooden board 3 to be attached to the back side of the sheet 2 may be plywood, particle board, hardboard,
LVL etc. can be used. The thickness is preferably 2.5 to 4.0 mm, and the pore diameter is preferably 5 to 15 mm, but is not limited thereto.

As the cushioning material 4, a polyolefin foam, a rubber foam, or the like having a thickness of 3 to 15 mm is used, and among these, closed foam is preferable because it has excellent waterproof properties and is less likely to collapse than open foam. If the thickness is less than 3 mm, it will not work well as a cushioning material, and if it exceeds 15 mm, it will sink heavily when walking, resulting in poor walking sensation.
Further, the foaming ratio of the cushioning material 4 is preferably 10 to 30 times for the cushioning material 4a having a large foaming ratio, and 3 to 10 times for the cushioning material 4b having a small foaming ratio, but is not limited thereto. A large number of independent convex portions 5 are formed on the lower surface of this cushioning material 4. The diameter of the convex portion 5 is 5 to 30 mm,
Although the height is preferably 1 to 5 mm, it is not limited thereto. In addition, the surface shape of the convex portion 5 is not only circular but also rectangular,
Of course, either a triangle or a polygon may be used.

In general, the sound insulation properties of flooring materials tend to improve as the contact area between the concrete floor and the wood flooring material becomes smaller.If the convex portion 5 is provided on the lower surface of the cushioning material 4 in this way, the contact area between the two can be improved. becomes smaller and improves sound insulation.

In addition, as shown in the drawing, a wooden board for the surface layer, a sheet with sound insulation, vibration damping, or sound insulation properties, and a perforated wooden board are combined into small pieces and assembled, and a cushioning material is pasted on the back side. These have better sound insulation properties than large-sized ones that are not divided into small pieces. This is thought to be because it becomes difficult for sound to propagate in the divided parts. The wood board cut into small pieces as described above has a loose tongue processing on the end surface that allows for slight bending, and flexibility is created in the groove on the back side created by the tongue joint after hardening. A hot-melt resin 6 is poured thereinto to bond them, and a cushioning material 4 is bonded to the entire back surface thereof.

[Example 1] Decorative plywood with a size of 30 cm x 90 cm and a thickness of 4 mm, a rubber foam sheet with a thickness of 2 mm, and a perforated plywood with a thickness of 4 mm and a hole diameter of 10 mm were bonded together with an adhesive. After that, a layer with a thickness of 5 mm and a foaming ratio of 4 is applied to the back side of this base material.
A polyolefin foam with a thickness of 5 mm and a foaming ratio of 15 times was butted against each other and bonded together with an adhesive to produce a desired flooring material.

[Example 2] After sequentially pasting together the decorative plywood, foam sheet, and perforated plywood used in Example 1, this was cut to produce an elongated rectangular board with a thickness of 10 mm, a width of 60 mm, and a length of 900 mm. Five of these sheets were slightly shifted in the longitudinal direction and joined at male and female grooves to form a base material. The male and female grooves are slightly bent at the joints and are loosely joined to conform to the irregularities of the base, and a hot melt resin that is flexible after curing is inserted into the groove on the back of the joint. It was poured and joined. Next, a polyolefin foam with a thickness of 5 mm and a foaming ratio of 4 times is matched against a polyolefin foam with a thickness of 5.0 mm and a foaming ratio of 15 times, and bonded to the back of the base material via an adhesive to form the desired shape. Manufactured flooring.

[Effects of the Invention] As described in detail above, the present invention makes it possible to obtain a wooden flooring material that has excellent sound insulation properties and is comfortable to walk on.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a sound insulating wooden flooring material as one embodiment of the present invention, Fig. 2 is a bottom view of the same, and Fig. 3 is an enlarged cross-sectional view taken along the line A-A of Fig. 2. In the drawings, 1 indicates a wooden board, 2 indicates a sheet having sound insulating, vibration-damping or cushioning properties, 3 indicates a perforated wooden board, 4a indicates a cushioning material with a large expansion ratio, 4b indicates a cushioning material with a small expansion ratio, 5 indicates a protrusion, and 6 indicates a hot melt resin.

Claims (1)

[Scope of utility model registration request] In a flooring material in which a cushioning material of approximately the same shape as the base material is attached to the back side of a base material that has undergone actual processing on the four circumferential sides, a cushioning material with a high foaming ratio and a cushioning material with a small foaming ratio are butted against each other. A sound-insulating wood flooring material with a buffer layer formed on it.