JPH0552080U - Soundproof flooring - Google Patents

Abstract

(57) [Summary] [Structure] The elastic material 2 was attached to the upper surface of the base material 1 made of wood plywood, and the decorative plate 3 was further attached to the upper surface of the elastic material 2.
Then, on the lower surface of the base material 1, a high specific gravity sheet 4 obtained by processing lead fibers into a sheet shape together with soft vinyl chloride is attached, and the base material 1 and the high specific gravity sheet 4 are divided by a plurality of vertical and horizontal grooves 11,
On the lower surface of the high specific gravity sheet 4, a cushioning material 5 having a thickness of 5 mm formed by covering one side of a non-woven fabric with foamed rubber was attached so that the non-woven fabric side was in contact with the high specific gravity sheet 4. [Effect] The weight of the base material can be made sufficient to act as a dynamic vibration absorber, and the weight of the entire floor material can be suppressed to a necessary minimum while ensuring the thickness of the entire floor material.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a soundproof flooring material in which a decorative board is attached to the upper surface of a base material made of wood plywood via an elastic material and a cushioning material is attached to the lower surface of the base material.

[0002]

[Prior Art]

 The base material is made of wood plywood, an elastic material such as a rubber sheet or a synthetic resin foam sheet is attached to the upper surface of the base material, and a wooden decorative board is attached to the upper surface of the elastic material. In addition, a sound-insulating flooring material comprising a cushioning material made of a rubber foam, a synthetic resin foam, or the like attached to the lower surface of the base material. Japanese Patent Application Laid-Open No. 63-107649 discloses a method in which the vibration energy of sound transmitted through the floor material is damped in the groove portion by carving the groove.

[0003]

[Problems to be solved by the device]

 In the soundproof flooring described in the above publication, each part of the base material divided by the groove is made of wood plywood, which is lightweight, and because it is divided by the groove, it is not restrained from the surroundings. When vibration in the direction perpendicular to the floor surface is transmitted to the base material via the elastic material, the divided base materials vibrate in the perpendicular direction together with the floor surface, and there is a problem that the soundproof effect is not emitted.

If the base material is made of a material having a higher specific gravity than the wooden plywood, even if the floor surface vibrates in the right angle direction, the base material acts as a dynamic vibration absorber to damp the vibration in the right angle direction. However, the soundproofing effect of the high-density material itself is usually lower than that of wooden plywood, and the flooring material requires a certain thickness due to construction requirements, and the base material is made of a high-density material. If the base material exceeds the weight required to act as a dynamic vibration absorber, the weight of the entire flooring material will increase, and the transportability and construction workability will deteriorate. Absent.

In view of the above-mentioned 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 entire floor material while reducing the weight of the entire floor material. The purpose is to provide a soundproof flooring material that is kept to the minimum necessary.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a soundproof floor material comprising a base material made of wood plywood with an elastic material attached to the top surface of the base material, and a cushioning material attached to the bottom surface of the base material. Among the decorative boards, at least the base material is divided by a plurality of vertical and horizontal grooves, and the high specific gravity layer made of a material having a higher specific gravity than the specific gravity of the base material is divided by the grooves. Is provided in each part of.

[0007]

[Action]

 The present invention provides a high specific gravity layer on each of the base materials divided by a plurality of vertical and horizontal grooves while keeping the total thickness of the floor material to a predetermined thickness, thereby dynamically absorbing the weight of each of the base materials. It can be increased to the weight needed to act as a container. Further, since the wooden plywood portion is left on the base material, the soundproofing effect of the wooden plywood can be expected.

[0008]

【Example】

 In the figure, reference numeral 1 denotes a base material of a soundproofing floor material according to the present invention, which is formed in a shape having a length of 900 mm and a width of 75 mm, and is composed of lauan plywood having a thickness of 3.8 mm. An elastic material 2 made of a foamed styrene-butadiene rubber (SBR) sheet having a thickness of 1 mm is attached 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 on the surface of lauan plywood. The applied decorative plate 3 was attached. Then, a high specific gravity sheet 4 obtained 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, and in this state, together with the high specific gravity sheet 4, A groove 11 having a width of 3 mm was provided on the base material 1. The grooves 11 are provided with a pitch of 50 mm in the longitudinal direction and a pitch of 25 mm in the lateral direction, and the groove 11 divides the base material 1 and the high specific gravity sheet 4 into 54 parts. After dividing the base material 1 and the high specific gravity sheet 4 into a plurality of pieces in this way, a cushioning material 5 is formed on the lower surface of the high specific gravity sheet 4 by covering one side of the non-woven fabric with foamed rubber to form a sheet with a thickness of 5 mm. The non-woven fabric side was attached so that the non-woven fabric side was in contact with the high specific gravity sheet 4.

[0009] A plurality of soundproof flooring materials having the above-mentioned structure are connected to each other to have a size of 2700 mm × 1800 mm, and the soundproofing floor material is attached to a concrete slab in a reverberation room with a double-sided tape. Measurement method for light impact sound and heavy impact sound according to "Measurement method of floor impact sound level in the field". Lo (dB) is the result of the same measurement of the concrete slab before the soundproof floor material is attached, and Ln (dB) is the measurement result of the soundproof floor material, and the floor impact sound level of the soundproof floor material is improved. The amount ΔL was calculated by the following formula.

ΔL = Lo −Ln On the other hand, by using the impact sound level Ls (dB) of the concrete floor surface at the actual construction site, which has already been set based on a large number of data, The estimated floor impact level L (dB) when constructed at the construction site was calculated by the following formula.

L = Ls−ΔL = Ls− (Lo−Ln) The estimated floor impact level L thus obtained is shown in FIG. In this figure, the vertical axis represents the estimated floor impact level L, and the horizontal axis represents the octave band center frequency F (Hz). Further, the solid line shown in A in the figure shows the estimated floor impact level for light impact sound, and the solid line shown in B shows the estimated floor impact level for heavy impact sound. In addition, L-40 to L-55 indicated by broken lines indicate sound insulation grades according to "Building Sound Insulation Performance Standards and Design Guidelines" of the Architectural Institute of Japan. As shown in this figure, the soundproof flooring material according to the above-mentioned embodiment has sound insulation performance equivalent to L-40 class for light impact sound and L-55 class for heavy impact sound. It was confirmed that

By the way, although the high specific gravity sheet 4 is interposed between the lower surface of the base material 1 and the cushioning material 5 in the above embodiment, the high specific gravity sheet 4 is interposed between the upper surface of the base material 1 and the elastic material 1. Alternatively, the base material 1 may be vertically divided and sandwiched between the vertically divided base materials. Further, in the above embodiment, the groove 11 is provided only in the base material 1 and the high specific gravity sheet 4, but the groove may be provided in the elastic material 2.

[0013]

[Effect of the device]

 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 at the same time, the thickness of the entire floor material can be ensured. The weight of the entire material can be suppressed to the necessary minimum.

[Brief description of drawings]

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

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

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

[Explanation of symbols]

 1 Base Material 2 Elastic Material 3 Decorative Board 4 High Specific Gravity Layer 5 Buffer Material 11 Groove

Claims (1)

[Scope of utility model registration request] 1. A soundproof floor material comprising a wooden plywood base material having an upper surface to which a decorative board is attached via an elastic material, and a lower surface of the base material having a cushioning material applied thereto, other than the decorative board. Among them, 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 part of the base material divided by the grooves. A soundproof flooring material that is characterized by that.