JP2530712B2 - 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, since the above-mentioned floor material is divided in the thickness direction of the wooden board and the foam is inserted between them, the strength is lower than that of the integrated one, and the floor material is divided in order to obtain strength that is not problematic in practical use. If the 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]

In order to achieve the above object, the soundproof flooring material of the present invention comprises a wooden board and a soundproofing section provided on the back surface thereof, and in the soundproofing floor material laid directly on the floor surface, the soundproofing section is the back surface of the wooden board. The spring constant attached to is 0.1kg / cm ・ cm ² or more 0.5kg / c
A vibration-proof part made of a foam of rubber or synthetic resin of m · cm ² or less and having a ratio (A) to the area of the wooden board of 5 to 50%; and a vibration-proof part mounted in a hole provided in the vibration-proof part. It consists of a rubber or synthetic resin molded product with a spring constant of 0.6 kg / cm · cm ² or more and 10 kg / cm · cm ² and the upper end is attached to the back surface of the wooden board and the ratio to the area of the wooden board (B ) Is 0.1 to 30
% Of the load-bearing portion, and a weight is attached to the lower portion of the foam of rubber or synthetic resin attached to the back surface of the wooden board at a position outside the attaching portion of the vibration isolator and When the ratio (C) to the area is 20 to 70%, and the weight of the weight is Mkg / cm ² , and the spring constant of the foam of the vibration absorber is Kkg / cm · cm ^2. , It is characterized in that K and M are adjusted so that

And as a preferable aspect, the hole provided in the vibration isolator is a hole reaching the back surface of the wooden board, and the upper end of the foam of the load-bearing portion is attached to the back surface of the wooden board. A lower end of the load bearing portion is located 1 to 3 mm above the lower surface of the vibration isolating portion, a lower end of the vibration absorbing 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 foam constituting the vibration isolator and the vibration absorber is made of 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. By adjusting the expansion ratio, the size of bubbles, the bubble structure, etc., the spring constants of the vibration isolator and the vibration absorber can be within the range of the present invention.

It is desirable that the thickness of the foam constituting the vibration isolator is 20 mm or less, and normally, the thickness of around 10 mm is used.

Spring constant of rubber or synthetic resin foam forming the anti-vibration part (static spring constant measured according to JIS K6385, the same applies hereinafter)
When the value is less than 0.1 kg / cm · cm ² , it is too soft and 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 butadiene 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.

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 and installed in advance in the hole provided in the vibration-proof part, and then the foam forming the vibration-proof part may be attached to the wooden board, or the load-bearing part may be smaller than the hole. When formed, the sheet-like foam and the load bearing portion may be separately bonded to the wood board.

The anti-vibration part is constructed by adding a weight of metal, mineral, resin, etc. to the lower surface of the foam of rubber or synthetic resin, and the spring constant Kkg / cm ・ cm ² of the foam of rubber or synthetic resin and the weight of the weight. Relationship with Mkg / 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 of the vibration isolator is attached to the wooden board through the foam, it moves up and down when a shock is applied to the wooden board to absorb the impact force. It must be located above the lower end of the load section.

The weight may be attached to the entire surface or a part of the back surface of the foam that constitutes the vibration isolator.

The anti-vibration part and the anti-vibration part are alternately adjacent or spaced apart,
Preferably, it is regularly attached to a wood board such as plywood.

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

The shapes of the vibration-proof portion, the load-bearing portion, and the vibration-absorbing portion are not particularly limited, but a sheet shape, a block shape, a disk shape, etc. are convenient for sticking to a wood board such as plywood.

When the amount of use of the anti-vibration unit is small, the sunk is great when a person walks on the floor and the feeling of walking is impaired, and when the amount is large, the sound insulation performance is reduced. Therefore, the ratio (A) to the area of the wooden board is 5 to 50% Limited to

The smaller the amount of load-bearing part used, the greater the sinking when a load is applied, and the larger the amount, the lower the sound insulation performance. Therefore, the ratio (B) to the area of the wood board is 0.1 to 30%.
Limited to

If the amount of vibration-isolating part used is small, the sound insulation performance is insufficient, and if it is large, the sound insulation performance is not significantly improved, but rather deteriorates. Therefore, the ratio (C) to the area of the wood board is 20%.
Limited to ~ 70%.

However, it is necessary to adjust so as to satisfy A + B + C ≦ 100.

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. The value of, the soundproof flooring material having a combination of, and as a comparative example, the result of measuring and comparing the soundproofing performance of the floor material having a vibration-proof portion, a load-bearing portion, and a vibration-absorbing portion that are partially outside the scope of the present invention Are shown in Tables 1 and 2.

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 material of the present invention, the vibration-proof part when there is no load or light load, and the load-bearing part when a load is applied, respectively, the impact noise is mainly in the frequency range of 500 Hz or higher. In addition, the foam and the weight, that is, the vibration absorbing portion serves as a dynamic vibration absorbing portion to reduce noise in the frequency range of 500 Hz or less.

[Examples 1 to 6 and Comparative Examples 1 to 5] Examples of the present invention will be described in detail below.

As shown in Figs. 1-3, thickness 10mm, width 20mm, length 900mm
10 in the length direction on the anti-vibration part 2 made of polyurethane foam
Holes 3 having a diameter of 10 mm are formed at intervals of 0 mm in the thickness direction, and a load-bearing portion 4 made of a natural rubber foam disk having a diameter of 10 mm is bonded to the holes 3 with a rubber adhesive 5. ing.

FIG. 4 shows a vibration absorbing portion 8 in which a plate-like weight 6 made of a lead plate is attached to a polyurethane foam 7 having a thickness of 3 mm, a width of 20 mm and a length of 900 mm by a rubber adhesive. At this time, instead of the lead plate, a granular weight 6'may be adhered with an adhesive to form the vibration absorbing portion 8'as shown in FIG.

The vibration-proof part having the load-bearing part 4 fitted therein as shown in Figs. 2 and 3 and the vibration-absorbing part 8 or 8'as shown in Figs.
A sound-proof flooring agent F as shown in FIG. 1 is constructed by alternately sticking 20 mm intervals to the back surface of a decorative plywood 10 mm wide, 900 mm long, and 1800 mm long with a rubber adhesive at intervals. At this time, the vibration-proof part 2 and the vibration-absorbing part 8 were attached so that the length direction of the vibration-proof part 2 and the width direction of the decorative plywood coincided with each other.

In the soundproof flooring material F having the above configuration, the spring constant of the vibration isolator 2, the spring constant and thickness of the load bearing portion 4, the vibration absorber 8
The spring constant K of the sheet-like polyurethane foam constituting (8 ') and the weight M of the weight 6 (6'), 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.

Comparative Examples 6 to 11 The polyethylene foam shown in FIG. 1 has a thickness of 10 mm and a length of
A vibration-proof part 2 having a width of 900 mm and a width shown in Table 2 is provided with a hole having a width and a length of 800 mm shown in Table 2, which has the same area as the hole and a thickness of 7 mm. A load-bearing portion 4 made of natural rubber foam is adhered with a rubber adhesive 5.

The vibration absorbing part 8 is formed by bonding a lead plate with a rubber adhesive to the lower surface of a polyethylene foam having a thickness of 4 mm, a length of 900 mm and a width shown in Table 2.

A soundproof floor material is formed by alternately sticking the same number of the vibration-damping portions 2 and the vibration-absorbing portions 8 with a rubber adhesive at intervals of 20 mm on a decorative plywood having a thickness of 12 mm, a width of 900, and a length of 1800 mm. did.

At this time, in the longitudinal direction of the vibration isolator 2 and the vibration absorber 8,
It was attached so that the width direction of the decorative plywood was the same.

〔effect〕

As described above, the soundproof flooring material of the present invention has a spring constant of 0.1 k in the vibration isolation part formed of a foam of rubber or synthetic resin.
Since it is g / cm ・ cm ² or more and 0.5 kg / cm ・ cm ² or less, frequency 50
It has an excellent sound insulation effect for sounds in the range above 0 Hz.

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.

Further, the soundproof flooring material of the present invention has a spring constant of the concave portion in a vibration absorbing portion formed by adding a weight to a foam of rubber or synthetic resin, where K is the weight of the weight, and M is 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 soundproofing flooring material of the present invention has excellent soundproofing performance even in the sound range of 500 Hz or higher, any of the sound range of 500 Hz or lower, and the noise on the upper floor can propagate downstairs. It has a great effect of preventing the deterioration of the living environment due to.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a soundproof flooring material of the present invention, FIG. 2 is a perspective explanatory view of a vibration isolating portion, FIG. 3 is a cross sectional explanatory view of the vibration isolating portion and a load bearing portion, and FIGS. [Fig. 3] is a perspective explanatory view of a vibration absorbing portion. 1 ... Wood board, 2 ... Vibration isolating part, 3 ... hole, 4 ... load bearing part, 5 ... adhesive, 6 ... plate weight, 6 '... granular weight, 7 ... rubber or Synthetic resin foam, 8,8 '…… Vibration absorber, F …… Soundproof floor,

Claims (1)

(57) [Claims] 1. A soundproof floor material comprising a wooden board and a soundproof section provided on the back surface of the wooden board, wherein the soundproof section has a spring constant of 0.1 kg attached to the back surface of the wooden board. /cm
・ Composed of rubber or synthetic resin foam of cm ² or more and 0.5 kg / cm ・ cm ² or less, and the ratio (A) to the area of the wood board is 5
It consists of a 50% anti-vibration part and a molded product of rubber or synthetic resin with a spring constant of 0.6 kg / cm · cm ² or more and 10 kg / cm · cm ² or less installed in the hole provided in the anti-vibration part. A load-bearing portion having an upper end portion attached to the back surface of the wooden board and a ratio (B) to the area of the wooden board of 0.1 to 30%; and the wood material at a position outside the attachment portion of the vibration isolator. A rubber or synthetic resin foam attached to the back surface of the board, a weight is attached to the bottom of the board, and the ratio (C) to the area of the wooden board is 20 to 70%; Weight of weight is Mkg / c
m ² , when the spring constant of the foam of the vibration absorbing portion is Kkg / cm · cm ² , A soundproof flooring material, in which K and M are adjusted so that (However, A + B + C ≦ 100)