JPH0833073B2 - Soundproof flooring - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a so-called direct-bonding soundproof flooring material that is used by being directly applied to a concrete floor surface of a house, for example, and more specifically, to a flooring material surface. The present invention relates to a soundproof flooring material for direct attachment, which can absorb generated impact sound and prevent it from propagating to a room below as an unpleasant sound.

[Conventional technology and problems]

As a floor material used for the upper floors of a house, etc. and having a soundproof property, a wood board is divided into a plurality of layers in the thickness direction, and a foam is interposed between the respective divided layers. , A sound-insulating wooden flooring material in which foam is also attached to the lowermost surface (Japanese Utility Model Publication No. 62-32139).

However, in the above flooring material, the wooden board is divided in the thickness direction and the foam is inserted between them, so the strength is lower than that of an integral wooden board, and there is practically no problem. Therefore, if the divided plate thickness is increased, there is a drawback that the sound insulation is deteriorated.

Further, to increase the sound insulation by sticking a foam on the entire lowermost surface, if the foam is softened or the thickness is increased, it is effective for sound insulation in the frequency range of 500 Hz or higher, but below that. In particular, it has little effect on sound insulation in the range below 250 Hz. Moreover, when the thickness of the foam is increased or the foam is made too soft, the foam layer is largely deformed (sunk) due to the weight of furniture or the like.

[Problems to be solved by the invention]

The object of the present invention is to solve the above problems in the prior art, prevent the impact sound generated on the floor material surface of the upper floor from propagating downstairs, and further, without lowering the strength and weight of furniture and the like. The purpose is to provide soundproof flooring that will not sink.

[Means for solving problems]

To achieve the above object, the soundproof flooring material of the present invention comprises a wooden board and a soundproofing part provided on the back surface thereof, and in a soundproofing floor material laid directly on the floor surface, on the back surface of the wooden board, on the back surface thereof. A sheet foam made of rubber or synthetic resin having irregularities is attached, and the soundproof section is provided with a vibration isolation section formed of a convex section of the sheet foam and a hole provided in the vibration isolation section. Load-bearing portion made of foamed rubber or synthetic resin, and a vibration absorbing portion formed by attaching a weight to the concave portion of the sheet-like foam, and the convex portion of the sheet-like foam, that is, the vibration-proof portion. The spring constant of the rubber or synthetic resin foam of the
0.1 kg / cm ・ cm ² or more and 0.5 kg / cm ・ cm ² or less, and the spring constant of the rubber or synthetic resin foam of the load-bearing part is 0.6 kg / cm
-Cm ² or more and 10 kg / cm-cm ² or less, and the weight of the weight is Mkg / cm ² , and the spring constant of the foam of the rubber or constituent resin of the recess of the sheet-like foam is Kkg / cm-cm. When we say ² , It is characterized in that K and M are adjusted so that

And as a preferable aspect, the lower end of the load-bearing part is located 1 to 3 mm above the lower surface of the vibration-proof part, and the hole provided in the vibration-proof part is a hole reaching the back surface of the wooden board. The upper end of the foam of the load-bearing portion is attached to the back surface of the wood board, the lower end of the vibration-proof portion is located above the lower end of the load-bearing portion, and It is a preferred embodiment that the weight is made of metal pieces, metal particles, or inorganic powder-filled resin in order to improve sound insulation performance, have sufficient strength for practical use, and prevent deformation of the foam layer.

The sheet-like foam is made by foaming natural rubber or synthetic rubber such as ethylene propylene rubber, butyl rubber, chloroprene rubber and styrene butadiene rubber, or synthetic resin such as polyethylene, polystyrene, polyvinyl chloride and polypropylene. The spring constant of the convex portion and the concave portion can be set within the range of the present invention by adjusting the size, the bubble structure, and the like.

The sheet foam preferably has a thickness of 20 mm or less, and usually has a thickness of about 10 mm.

When the spring constant (the static spring constant measured according to JIS K6385, the same below) of the convex part that constitutes the vibration-proof part of the sheet-like foam having irregularities on the back surface is 0.1 kg / cm · cm ² or less, it is too soft, The sound insulation effect cannot be obtained because it is crushed by the weight of the wood board such as plywood. However, if the spring constant exceeds 0.5 kg / cm · cm ² , the anti-vibration effect is small, and the sound insulation performance in the frequency range of 500 Hz or higher deteriorates.

The load-bearing part is made of natural rubber or synthetic rubber such as ethylene propylene rubber, butyl rubber, chloropyrene rubber, and styrene-budadiene rubber, or a molded product of synthetic resin such as polyethylene, polystyrene, polyvinyl chloride, polypropylene, and ethylene vinyl acetate copolymer. It is a foam or non-foam. The shape is not particularly limited, but it is convenient to fit a rectangular parallelepiped, a cube, a cylinder, a cone, a corner cone, or the like into the hole provided in the vibration isolator and to attach it to the wood board.

If the spring constant of the load-bearing part is less than 0.6 kg / cm ・ cm ² , the floorboard sinks significantly when a heavy object such as furniture is placed on it, making it difficult for the furniture to sit, resulting in a spring constant of 10 kg / cm ・ cm ^2. If it exceeds, the soundproofing effect is significantly deteriorated.

If the lower end of the load-bearing part is located less than 1 mm above the bottom surface of the anti-vibration part, the vibration of the floorboard due to the impact when there is no load will be transmitted to the load-bearing part and the sound insulation will deteriorate. However, when it is located above 3 mm and is located above, when a heavy object such as furniture is placed, the floorboard sinks largely, and sitting of the furniture becomes unstable.

The load-bearing part may be inserted into a hole provided in the vibration-proof part in advance and adhered to it, and then the sheet-like foam may be attached to the wood board, or when the load-bearing part is formed smaller than the hole. The sheet-shaped foam and the load bearing portion may be separately bonded to the wood board.

A weight of metal, mineral, resin, etc. is attached to the recess of the sheet-like foam to form a vibration absorbing part, and the spring constant of the recess Kkg /
The relationship between cm ・ cm ² and weight weight Mkg / cm ・ cm ² K and M are adjusted so as to be as follows, but by setting K and M within the range of the above formula, the sound insulation performance in the sound range of 500 Hz or less, which is difficult to reduce, is improved.

Since the weight is attached to the wooden board through the foamed material of the recessed portion, it moves up and down when a shock is applied to the wooden board and absorbs the impact force. It must be located above the lower end of the load section.

The weight may be attached to the entire surface of the concave portion of the foam or may be partially attached.

Adhesion is performed using a pressure sensitive adhesive, a reactive adhesive, a solvent or emulsion adhesive, a hot melt adhesive, or the like.

The ratio of the convex portions and the concave portions of the sheet-shaped foam may be appropriately determined in consideration of the thickness of the foam, the spring constant, etc., but the convex portion is preferably 5 to 50% with respect to the area of the wooden board. The load bearing portion is preferably 0.1 to 30% of the area of the wooden board.

Table 1 has a structure which will be described in detail later as an example of the present invention.
As shown in Examples 1 to 6 in the vibration isolating portion, the load bearing portion, the spring constant of the vibration absorbing portion, the thickness, and the spring constant K of the vibration absorbing portion and the weight M of the weight. And a sound-proof flooring material having a combination of the following values, and as a comparative example, a part having a vibration-proof part, a load-bearing part, and a vibration-absorbing part outside the claims of the present invention, and the others were made in the same manner as the example Table 1 shows the results of measuring and comparing the soundproofing performances of the floor materials.

Regarding the measurement conditions, each floor material was installed on a concrete floor with a thickness of 150 mm, and the lightweight floor impact sound level measured according to JIS A1418 was expressed by the sound insulation grade specified in JIS A1419 to obtain the soundproof performance.

In the evaluation results of the sound insulation class in Table 1, with no load,
Based on JIS A1418, it was measured by placing a tapping machine on the soundproof flooring material, and when loading, assuming that furniture etc. were placed, a sand bag was placed around the tapping machine.
It is measured at a rate of 0 kg / m ² .

The smaller the number of sound insulation, the higher the soundproofing effect, and it is said that L55 or less is preferable for reinforced concrete apartments.

To measure the load bearing capacity of a soundproof floor, 100 kg /
A load of m ² was placed, and the sinking of the plywood after 10 days was measured. If the sinking of plywood exceeds 5 mm, it will cause problems in practical use.

[Operation] According to the soundproof flooring of the present invention, the impact sound is mainly generated by the convex portion of the sheet-like foam, that is, the vibration-proof portion when no load is applied or when the load is applied, and by the load-bearing portion when a load is applied. Noise is reduced in the frequency range of 500 Hz or higher, and the recess and weight of the sheet-like foam, that is, the vibration absorbing portion, serves as a dynamic vibration absorber, and noise in the frequency range of 500 Hz or lower is reduced.

〔Example〕

 Hereinafter, examples of the present invention will be described in detail.

As shown in Fig. 1, thickness a is 10 mm and width b is 20 mm on the back surface.
The upper surface of a sheet-like polyurethane foam in which convex portions 2 (anti-vibration portions) and concave portions 5 having a thickness c of 4 mm and a width d of 20 mm are alternately arranged is attached to a decorative plywood 1. In the floor material, holes 3 with a diameter of 10 mm that penetrate through the convex portion 2 at intervals of 100 mm in the thickness direction
A load-bearing portion 4 made of a natural rubber foam disk having a diameter of 10 mm is inserted into the hole 3 of the convex portion 2, and the upper end portion of the load-bearing portion 4 is formed of an adhesive agent as described above. It is attached to the back of the decorative plywood 1.

A lead plate 6 is provided in the recess 5 of the sheet-like polyurethane foam.
Is a sound-insulating flooring material F in which the vibration-absorbing portion 8 is formed by bonding with the adhesive 7. At this time, instead of the lead plate, a granular weight 6'may be bonded with an adhesive 7'to form the vibration absorbing portion 8 '.

In the soundproof flooring material F having the above structure, the spring constant of the vibration-proof portion of the convex portion 2, the spring constant and thickness of the load-bearing portion 4, and the concave portion 5 (of the sheet-shaped polyurethane foam constituting the vibration-absorbing portion 8 (8 ') ( 5 ') spring constant K and weight 6 (6') weight M, and The soundproof flooring material F of the present invention is constituted by setting the values of the above as the combinations shown in Table 1 as Examples 1 to 6.

〔effect〕

As described above, the soundproof flooring material of the present invention has a spring constant of 0.1 kg / cm.
Since it is cm ² or more and 0.5 kg / cm · cm ² or less, it has an excellent sound insulation effect for sounds in the frequency range of 500 Hz or more.

The spring constant is 0.6 kg / in the hole provided in the vibration isolator.
Since the load-bearing part consisting of a molded product of rubber or synthetic resin of cm / cm ² or more and 10 kg / cm / cm ² or less is fitted, there is little sinking when placing heavy objects such as furniture, and therefore furniture Excellent sound insulation when equal weight objects are placed.

As described above, the flooring material of the present invention has excellent soundproofing performance in both cases where heavy items such as furniture are placed and where they are not placed.

In the sound absorbing flooring material of the present invention, when the weight of the K weight is defined as the spring constant of the concave portion in the vibration absorbing portion formed by adding a weight to the sheet foam concave portion, Since K and M are adjusted so as to satisfy the following, it is possible to improve the sound insulation performance for the sound in the frequency range of 500 Hz or less, which was difficult to reduce with the conventional soundproof flooring material.

Further, the soundproof flooring material of the present invention does not require special processing such as dividing a wood board such as plywood in the thickness direction and inserting a foam between them unlike the conventional one, so that the strength of the wood board is reduced. I won't let you.

As described above, the soundproof flooring material of the present invention has an excellent soundproofing performance for the sound range of 500 Hz or more, any range of the sound range of 500 Hz or less, and the noise of the upper floor is propagated downstairs. It has a great effect of preventing the deterioration of the living environment.

[Brief description of drawings]

1 and 2 are cross-sectional explanatory views showing the soundproof flooring material of the present invention. 1 ... Wood board, 2 ... Sheet-shaped foam convex portion (vibration isolator),
3 ... Hole, 4 ... Load-bearing part, 5, 5 '... Sheet-like foam concave part, 6 ... Plate-like weight, 6' ... Granular weight, 7, 7 '...
Adhesive, 8,8 ′ …… Vibration absorber, F …… Soundproof flooring,

Claims (1)

[Claims] 1. A soundproofing floor material comprising a wooden board and a soundproof portion provided on the back surface thereof, which is directly laid on the floor surface. A sheet of rubber or synthetic resin having unevenness on the back surface of the wooden board. A foam is attached, and the soundproof part is made of a rubber or synthetic resin foam attached to a hole provided in the vibration-proof part, and a vibration-proof part made of a convex part of the sheet-like foam. The load-bearing portion and a vibration absorbing portion formed by attaching a weight to the concave portion of the sheet-shaped foam, the convex portion of the sheet-shaped foam, that is, the rubber or synthetic resin foam of the vibration-proof portion is The spring constant is 0.1 kg / cm ・ cm ² or more and 0.5 kg / cm ・ cm ² or less, and the spring constant of the rubber or synthetic resin foam of the load-bearing part is 0.6 kg / cm ・ cm ² or more 10 kg / cm ・cm ² or less and, MKG / cm ² on the weight of said weight, foam rubber or synthetic resin of the recess of the sheet-like foam The spring constant Kkg / cm ·
cm ² A soundproof flooring material, in which K and M are adjusted so that