JP2536685Y2 - 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 sound-insulating flooring material in which a decorative board is attached to the upper surface of a base material made of wooden plywood via an elastic material and a cushioning material is attached to the lower surface of the base material. .

[0002]

2. Description of the Related Art A base material is made of a wooden plywood, and an elastic material such as a rubber sheet or a synthetic resin foam sheet is adhered to an upper surface of the base material. A soundproof flooring material in which a board is attached and a cushioning material such as a rubber foam or a synthetic resin foam is attached to the lower surface of the base material, and the base material is vertically and horizontally attached to the base material. Japanese Patent Application Laid-Open No. Sho 6 (1994) discloses a method in which a plurality of grooves to be divided are formed so that vibration energy of sound transmitted through the floor material is attenuated in the grooves.
It is described in JP-A-3-107649.

[0003]

In the sound-insulating flooring described in the above publication, each part of the base material divided by the groove is made of wooden plywood, so that it is lightweight and divided by the groove. Because it is not constrained from around, when vibration in the direction perpendicular to the floor surface is transmitted to the base material through the elastic material,
These divided base materials vibrate in the above-described perpendicular direction together with the floor surface, and there is a problem that the soundproof effect is not exhibited.

[0004] If the base material is made of a material having a higher specific gravity than wooden plywood, the base material acts as a dynamic vibration absorber to attenuate the vibration in the perpendicular direction even if the floor surface vibrates in the perpendicular direction. However, the soundproofing effect of the high specific gravity material itself is usually lower than the soundproofing effect of the wooden plywood, and the flooring material requires a certain thickness due to construction requirements and the like. Not only does the material exceed the weight required for acting as a dynamic vibration absorber, but also the weight of the entire flooring increases, resulting in a problem that transportability and workability are reduced, and this is not practically applicable.

In view of the above problems, the present invention makes the weight of the base material sufficient to act as a dynamic vibration absorber, and at the same time secures the thickness of the whole floor material while reducing the weight of the whole floor material. An object of the present invention is to provide a sound-insulating flooring material that is kept to a minimum.

[0006]

In order to achieve the above-mentioned object, the present invention provides a method for attaching a decorative board to an upper surface of a base material made of wooden plywood via an elastic material and attaching a cushioning material to a lower surface of the base material. A soundproof flooring material that is adhered, and in which at least the base material other than the decorative board is divided by a plurality of vertical and horizontal grooves, a high specific gravity layer made of a material having a higher specific gravity than the specific gravity of the base material It is provided on each part of the base material divided by the groove.

[0007]

According to the present invention, the weight of each base material is reduced by providing a high specific gravity layer on each of the base materials divided by a plurality of vertical and horizontal grooves while keeping the thickness of the entire flooring material at a predetermined thickness. It can be increased to the weight required to act as a dynamic vibration absorber. Further, since the wooden plywood portion is also left on the base material, the soundproofing effect of the wooden plywood can be expected.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 denotes a base material of a soundproof flooring material according to the present invention, which is formed in a shape of 900 mm in length and 75 mm in width, and is composed of 3.8 mm thick Lauan plywood. An elastic material 2 made of a foamed styrene-butadiene rubber (SBR) sheet having a thickness of 1 mm is adhered to the upper surface of the base material 1, and a decorative veneer 31 is attached to the upper surface of the elastic material 2 and to the surface of the Lauan plywood.
Was applied to the decorative plate 3. Then, a high specific gravity sheet 4 formed by processing lead fibers together with soft vinyl chloride into a sheet having a thickness of 1 mm is attached to the lower surface of the base material 1 to form a high specific gravity layer. 3mm width for material 1
Groove 11 was provided. The groove 11 has a vertical pitch of 50 mm,
The groove 1 is provided at a pitch of 25 mm in the horizontal direction.
1, the base material 1 and the high specific gravity sheet 4 are divided into 54 parts. After dividing the base material 1 and the high specific gravity sheet 4 into a plurality of pieces in this manner, a buffer material 5 formed on a lower surface of the high specific gravity sheet 4 into a sheet having a thickness of 5 mm by covering one surface of a nonwoven fabric with foamed rubber. Then, the nonwoven fabric side was adhered so as to be in contact with the high specific gravity sheet 4.

[0009] A plurality of the soundproof flooring materials having the above-described configuration are connected to each other to have a size of 2700 mm x 1800 mm, and are adhered to a concrete slab in a reverberation room with a double-sided tape. Measurement of Light Impact Sound and Heavy Impact Sound in accordance with "Method of Measuring Floor Impact Sound Level in". The result of performing the same measurement on the concrete slab before the soundproofing floor material is attached is defined as Lo (dB), and the measurement result on the soundproofing flooring material is defined as Ln (dB).
The floor impact sound level improvement amount ΔL of the soundproof floor material was determined by the following equation.

ΔL = Lo−Ln On the other hand, the impact sound level Ls of the concrete floor surface at the actual building site which has already been set based on a large number of data
Using (dB), an estimated floor impact level L (dB) when the above soundproof floor material was constructed on an actual building site was determined by the following equation.

[0011] FIG. 3 shows the estimated floor impact level L obtained in this manner.
In this figure, the vertical axis indicates the estimated floor impact level L, and the horizontal axis indicates the octave band center frequency F (Hz). Also, in the figure, the solid line shown in A indicates the estimated floor impact level for the light impact sound, and the solid line shown in B indicates the estimated floor impact level for the heavy impact sound. L-40 to L-5 indicated by broken lines.
Reference numeral 5 indicates a sound insulation grade according to the "Architectural Institute of Japan's" Sound insulation performance standards and design guidelines ". As shown in this figure,
The sound-insulating flooring according to the above-described embodiment has L-
It was confirmed to have sound insulation performance equivalent to class 40 and heavy shock noise equivalent to class L-55.

In the above embodiment, the high specific gravity sheet 4 is used.
The high specific gravity sheet 4 may be interposed between the upper surface of the base material 1 and the elastic material 1 while the base material 1 is interposed between the lower surface of the base material 1 and the cushioning material 5. It may be divided vertically and sandwiched between the vertically divided substrates. Further, in the above embodiment, the grooves 11 are provided only in the base material 1 and the high specific gravity sheet 4, but grooves may be provided in the elastic material 2.

[0013]

According to the present invention, since the high specific gravity layer is provided on the base material, the weight of the base material can be made sufficient to act as a dynamic vibration absorber, and the thickness of the entire flooring material can be reduced. It is possible to keep the weight of the entire flooring material to a minimum while securing it.

[Brief description of the drawings]

FIG. 1 is a plan view showing a shape of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a diagram showing an estimated floor impact level of the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 base material 2 elastic material 3 decorative board 4 high specific gravity layer 5 cushioning material 11 groove

Claims (1)

(57) [Scope of request for utility model registration] 1. A soundproof flooring material comprising a wooden plywood substrate, a decorative board adhered to an upper surface of the substrate via an elastic material, and a cushioning material adhered to a lower surface of the substrate. Of those, at least the base material is divided by a plurality of vertical and horizontal grooves, and a high specific gravity layer made of a material having a higher specific gravity than the specific gravity of the base material is provided on each portion of the base material divided by the grooves. A soundproof flooring material characterized by that.