JPH0469237A - Sound insulating wood floor material - Google Patents

Abstract

PURPOSE:To make sound-insulation properties furthermore better than that of the conventional sound-insulating wood floor material by cutting a decorative wood sheet at least in either one direction of its longitudinal and width directions and constituting the sheet of a plurality of divided pieces. CONSTITUTION:A sound-insulating wood floor material is provided with a decorative wood sheet 1 wherein both ends formed in a step-like shape seen from a plane, an intermediate porous wood sheet 2 which is joined on the rear face of the decorative wood sheet 1 and wherein both ends are formed in a step-like shape being similar to the decorative wood sheet 1 and a lower cushioning member 3 positioned on the rear face of the intermediate porous wood sheet 2 and the decorative wood sheet 1 are cut at three parts in the longitudinal direction and constituted thereby of four divided pieces 1A. the intermediate porous wood plate 2 is displaced in such a way that a horizontal adhesive part 9 and a holding part 10 for an adhering part of the adjoining wood sheet are formed and joined to the decorative wood sheet 1. The cushioning member 3 is joined to the rear face of the intermediate porous wood sheet 2 and is divided into the first cushioning member 13 of the upper position and the second cushioning member 14 of the lower position.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a sound-insulating wooden flooring material.

2. Description of the Related Art As a sound-insulating wooden flooring material, a flooring material in which a foam is pasted to the entire lower surface of a wooden board has been proposed, as shown in Japanese Utility Model Application Publication No. 56-3945.

However, this proposed flooring material has the following problems.

First of all, regarding sound insulation, it is said that there is no problem if the sound insulation grade is L-55 or less, so if the foam has a foaming ratio that takes only sound insulation into consideration, if the thickness is made sufficiently thick, it will be 250. Although the sound insulation grade is L-55 or lower in the high and low sound ranges excluding the midrange of ~500 Hz, it is difficult to reach L-55 in the midrange. In addition, if the foam is made too thick, the wooden floor will sink locally when heavy items such as heavy furniture are placed on it, and it will also rise and fall every time you walk, making it uncomfortable to walk on. occurs separately. In order to eliminate this problem, it is possible to reduce the foaming ratio, but in order to improve the sound insulation performance in this way, it is necessary to increase the thickness even more than with a foam with a relatively high foaming ratio. Moreover, it becomes expensive in terms of cost. Note that in order to block mid-range sounds, it is possible to use a sound insulating board containing heavy metal fibers such as lead, but this is expensive and impractical.

Therefore, the applicant has developed a system that not only has good sound insulation properties for all sound ranges including the midrange, but also does not cause problems such as settling when heavy objects are placed or poor walking sensation, and is inexpensive and practical. We proposed a wooden flooring material with a high level of quality.
No. 39).

This sound-insulating wood flooring material consists of a decorative wood board with one or more cushioning members (sound-insulating foam) interposed at predetermined intervals in the middle of the thickness, and a decorative wood board arranged on the bottom surface of the decorative wood board. It is equipped with a lower buffer member (sound insulating foam).

Problems to be Solved by the Invention Although the above-mentioned conventional wooden flooring materials have a sound insulation grade of L-55 or lower in all sound ranges, it goes without saying that in reality, further improvement in sound insulation performance is desired.

An object of the present invention is to provide a sound-insulating wooden flooring material that meets the above-mentioned needs.

Means for Solving the Problems In order to achieve the above object, the sound insulating flooring material according to the present invention comprises a decorative wood board, an intermediate porous wood board joined to the lower surface of the decorative wood board, and an intermediate porous wood board. The decorative wooden board is cut in at least one of its length and width directions, and is composed of a plurality of divided pieces.

As a specific example of the material of the decorative wood board, plywood is generally used, but other materials such as particle board, hardboard, and medium density fiberboard can be mentioned, and the surface thereof is decorated as appropriate. This decoration is usually done by pasting precious wood veneer, sawn board, pattern sheet, synthetic resin sheet, cork, etc. on the surface, or by painting. The decorative wood board may be divided into a plurality of upper and lower parts, with a relatively thin buffer member interposed between the divided wood boards, and these parts may be integrally joined. Specific examples of the interposed cushioning member of the decorative wood board include polyethylene, polypropylene, polyurethane, polystyrene, synthetic resin foam such as vinyl chloride, other natural rubber, or SBR.
, butyl rubber, nitrile rubber, etc. 20~
An example is a foam that is about 30 times larger. Furthermore, parallel grooves having a depth of half the thickness of the groove may be formed in one direction or in two directions intersecting each other on the entire lower surface of the decorative wood board. When an intervening shock absorbing member is present, the groove is formed by cutting from the lower surface of the decorative wood board until it reaches the lower surface of the intervening shock absorbing member, but it may have a depth that does not reach the lower surface but is close to this. Groove width is 260~
6. Omm.

A suitable groove pitch is 20 to 50 square centimeters. The two opposing sides of the decorative wood board can be shaped into any suitable shape, such as stepped, square, or hexagonal when viewed from the plane, and the surrounding area can be joined using tongue and groove, interlocking, or other known joining methods. (The thickness of the E-decorative wood board is 6,
It is generally 0 to 15°Omm.

The intermediate porous wood board is appropriately selected from the materials for the upper wood board, but plywood and medium-density fiberboard are preferable in terms of hole processing. In each case, 2.5 to 7 IIIll is appropriate. The hole is usually a circular hole of 5 to 301 CII+, but it can be of any shape such as a triangle, square, or rectangular shape. The hole spacing is preferably 5 to 50 m5, and the porosity is preferably about 10 to 40%.

The arrangement of the holes is not particularly limited, but for boat fishing, the holes may be arranged linearly or staggered at equal intervals both vertically and horizontally. Further, the holes may be penetrating, or a hole with a bottom may be formed on one side of the wooden board, or a combination of a hole with a bottom and a through hole may be formed.

Note that the intermediate porous wood board is joined to the decorative wood board by being shifted so that a horizontal bonding part and an adjoining wood board bonding part accommodating part are formed, but it may also be joined to the decorative wood board without being shifted. .

The lower cushioning member may be an integral piece or two members joined together above and below, but the latter is preferable. In this case, the material for the upper first cushioning member has a basis weight of 100 g/m2.
Nonwoven fabrics made of vinyl fibers or polyester fibers are commonly used, but other fibrous cushioning materials such as felt, paper, and woven fabrics are also used. The thickness of the first buffer member is 1.0
~3.01 is appropriate. The material for the second shock absorbing member may be a synthetic resin foam such as polyethylene, polypropylene, polyurethane, polystyrene, or vinyl chloride, or a foam that is about 20 to 30 times stronger than other natural rubber or rubber-based resin such as SBR, butyl rubber, or nitrile rubber. is used.

Note that the upper and lower surfaces or the lower surface may be corrugated in an uneven manner. Normally, the lower cushioning member is used by joining it to the lower surface of the intermediate porous wood board, but when using a wide-area cushioning member, it may be laid on the subfloor in advance.

The reason why the materials of the first buffer member and the second buffer member are different from each other as described above is that the former material has a poor sound insulation effect when the center frequency of the octave band is 125 Hz or less.
It is effective between 250 and 500 Hz, and the latter material is exactly the opposite, so by combining the two,
This is because an excellent sound insulation effect can be obtained with respect to the definition of the bass range and the middle range. Moreover, it has good pressure resistance, meaning that the floor material does not sink even when a load is applied for a long period of time. The appropriate thickness of the entire lower buffer member is 5 to 15 mm.

Effect: According to the sound-insulating wooden flooring material of the present invention, the decorative wood board is cut in at least one of the length and width directions, and is composed of a plurality of divided pieces, and the decorative wood board is made up of a plurality of divided pieces. Since the intermediate porous wood board is bonded to the lower surface of the floor, each divided piece that makes up the decorative wood board can move independently when an impact is applied to the floor. As a result, the resonant frequency is higher than that of an undivided wooden board, so that impact sound is absorbed by the lower buffer member disposed on the lower surface of the intermediate porous wooden board.

Furthermore, since the intermediate porous wood board is bonded to the lower surface of the decorative wood board, even if a load is applied to the cut portion of the decorative wood board, the floor material will not warp to the extent that it causes problems.

Example Embodiments of the invention will be described below with reference to the drawings.

The illustrated sound-insulating wooden flooring materials include a decorative wooden board (1) whose ends are shaped like steps when viewed from a plane, and a decorative wooden board (1).
) is joined to the lower surface of the intermediate porous wooden board (2), and both ends are formed into a stepped shape similar to the decorative wooden board (1), and the lower part is arranged on the lower surface of the intermediate porous wooden board (2). Buffer member (3
), the decorative wood board (1) is cut at three places in its length direction, and is composed of four divided pieces (1A). In addition, in Figure 3, the first and second
Lines (5) extending in the center width direction of the length between the third cutting line and between the third cutting line and one side edge of the decorative wood board are the decorative layer (decorative veneer → only This is the seam in the width direction.

At the location of the cutting line (6), a chamfer (8) is formed on the divided piece (1A) that extends beyond the decorative layer (7) made of precious wood veneer of the decorative wood board (1) and reaches the plywood. There is. This is to make the sinking less noticeable even if one of the two adjacent divided pieces sinks due to a load being applied to it.

The intermediate porous wood board (2) has the same planar shape as the decorative wood board (1), and is shifted so that the horizontal adhesive part (9) and the adjoining wood board adhesive part accommodating part (1o) are formed. It is joined to the plate (1).

Parallel grooves (11) having a depth of half the thickness of the habo are provided in the left and right direction on the entire lower surface of the decorative wood board (1), and the depth of the grooves is 2.5 mm. , groove width is 3.0
(2) The groove pitch is 25 mm. The decorative wood board (1) is made of plywood, and the periphery thereof is processed to perform tongue and groove.

Plywood with a thickness of 3.0 mm is used for the intermediate porous wooden board (2), and the holes (12) are circular through holes with a diameter of 2211 Im, and the interval between the holes (12) is 16 square meters. They are arranged vertically and horizontally in a straight line at equal intervals.

The buffer member (3) is joined to the lower surface of the intermediate porous wooden board (2), and is divided into an upper first buffer member (13) and a lower second buffer member (14).

The first buffer member (13) is made of vinyl fiber nonwoven fabric with a thickness of 3.0 mm and a basis weight of 100 g/m2, and the second buffer member (14) is made of a nonwoven fabric made of vinyl fiber with a thickness of 5゜0+sm. It is a natural rubber foam that has been expanded 30 times.

Effects of the Invention According to the sound-insulating wooden flooring material of the present invention, when an impact is applied to the floor, each divided piece constituting the decorative wooden board moves independently, and as a result, compared to an undivided piece, Since the resonant frequency is increased and the impact sound is easily absorbed by the lower buffer member disposed on the lower surface of the intermediate porous wood board, the sound insulation property is further improved compared to the conventional sound insulation wood flooring material mentioned at the beginning.

Furthermore, the decorative wood board is made up of multiple pieces, and since the intermediate porous wood board is joined to the bottom surface of the divided pieces, even if a load is applied to the cut part of the decorative wood board, it will not cause problems. Deflection does not occur in the flooring material, and therefore problems such as sinking when heavy objects are placed and poor walking sensations do not occur.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged cross-sectional view taken along line II in FIG. 3, FIG. 2 is a partially cutaway bottom view, and FIG. 3 is a plan view. . <1)... Decorative wood board, (1A)... Divided piece, (2
)...middle porous wood board, (3)...lower buffer member,
(6)... Cutting line. that's all

Claims (1)

[Claims] Decorative wood board (1), intermediate porous wood board (2) joined to the lower surface of the decorative wood board (1), and intermediate porous wood board (2)
It is equipped with a lower buffer member (3) arranged on the lower surface of the
A sound-insulating wooden flooring material in which a decorative wooden board (1) is cut in at least one of its length and width directions, and is composed of a plurality of divided pieces (1A).