JPH0517340B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a dry floating floor structure capable of improving weight impact noise. More specifically, the present invention relates to a dry floating floor structure that can effectively attenuate weight impact sound in dry floating floor structures constructed in wooden houses, apartment complexes, and the like.

[Conventional technology]

Noise and vibrations such as footsteps on the floors of houses and the sound of children jumping up and down can cause unbearable discomfort to people in the residential environment, and can also damage interpersonal relationships in the neighborhood, creating a social problem. Therefore, its improvement is considered an important and urgent issue in the field of housing construction technology.

Noise and vibrations that propagate through the floor from upstairs to downstairs are broadly classified into light impact sound and heavy impact sound, as described in JIS-A-1418. “Sound insulation performance standards and design guidelines for buildings” (edited by the Architectural Institute of Japan, 80-97)
Page) states that the methods for preventing the propagation of light impact sound and heavy impact sound are fundamentally different. In other words, by providing a flexible floor covering material such as carpet or tatami mats on the floor surface, it is possible to reduce the light impact noise generated by hard impacting objects, such as the sound of shoes or falling objects. It has the effect of softening the impact, and therefore a method for reducing the loudness of downstairs noise by removing the high frequency components of the generated sound has been described and is generally put into practical use. However, the weight impact sound generated by soft impact objects, such as the sound of children jumping and barefoot walking, is directly related to the effect of the mass of the concrete slab, and the use of the floor finishing material mentioned above is directly related to the effect of the mass of the concrete slab. Dry floating floor structures such as joist floor structures, dry double bed structures, etc. are said to have little effect.

In Japan, where people don't wear shoes indoors, countermeasures against weight impact noise are of utmost importance. Conventional techniques include increasing the thickness of the concrete slab, or covering the concrete slab with cushioning material such as rock wool, and placing it on the wall. After cutting the edges, a method is adopted in which a waterproof coating is applied with polyethylene film, and a floating bed layer of concrete or mortar is placed on top of it to create a wet floating bed structure. However, the method of increasing the thickness of the concrete slab increases the total weight of the building frame, and increases the material and construction costs from the stage of laying the foundation to maintain strength, making the cost extremely high. When used as a floor, it gives people the feeling of a hard floor or a cold feeling, causing problems in walking safety, heat retention, and insulation, and has the disadvantage that it cannot be called a comfortable living space. In addition, the wet floating floor structure cannot be expected to be effective unless the concrete slab and floating floor are completely isolated, and construction is extremely difficult.As with the method of increasing the thickness of the concrete slab itself, the floor surface is Since it is made of concrete, it has the disadvantage that it cannot be called a comfortable living space.

On the other hand, conventional technologies for improving such livability include a joist floor structure in which floor materials are laid on top of a large joist via joists, and a dry double floor structure in which support legs are attached to plywood to support them. Floating floor structures have been proposed, but although they are effective in preventing the propagation of lightweight impact sounds, they are said to be almost ineffective in preventing the propagation of heavy impact sounds. In other words, there is a strong demand for the development of a floor structure that can prevent the propagation of such weight impact noise and provide a comfortable living space.

[Problem that the invention seeks to solve]

The present invention was made in view of the problems of the prior art, and its purpose is to take advantage of the characteristics of the dry floor structure to provide a comfortable living space with heat retention and insulation properties, as well as walking safety. To provide a dry floating floor structure that prevents the propagation of weight impact noise and is easy to construct.

[Means for solving problems]

The inventors of the present invention have repeatedly investigated the reason why the dry floating floor structure is not effective in preventing the propagation of weight impact sound. As a result, when a soft impact object is applied to the flooring material, the vibration of the flooring material is Along with the propagation, the vibrations in the air layer under the floor caused by this vibration cause the walls of the building frame and the surrounding wall surfaces of the underfloor space such as sills, partitions, and columns to resonate, and the vibrations are transmitted to the concrete frame. It was discovered that the effect of preventing weight impact sound from propagating is lost due to the propagation of the weight impact sound, leading to the completion of the present invention.

That is, the present invention provides a dry floating floor structure in which a subfloor material or a laminate of a floor material and a subfloor material is laid on a concrete slab of a building frame structure via support legs, the structure comprising a building frame and a Partitions, thresholds,
A space is provided between a member such as a column that partitions the underfloor space and the underfloor material or the laminate by cutting off contact therebetween, and a cushioning material is disposed in the space, and the cushioning material is At least, the cushioning material is disposed along the wall surface of the building frame and the member from the concrete slab surface to the height of the flooring material or laminate, and the cushioning material has a thickness within the range of 5 mm to 50 mm and a density.
Through a dry floating floor structure characterized by a range of 30Kg/m ³ to 300Kg/m ³ and a joist structure installed on a buffer material laid on the surface of a concrete slab of a building frame structure. A dry floating floor structure formed by laying a subflooring material or a laminate of a flooring material and a subflooring material, comprising a building frame, members for partitioning the underfloor space such as partitions, thresholds, and columns, and the subflooring material or A space is provided therebetween by cutting off contact with the laminate, and a cushioning material is further provided in the space, and the cushioning material in the space is
At least, the cushioning material extends along the wall surface of the building frame and the member from the concrete slab surface to the height of the flooring material or laminate, and the buffering material has a thickness within the range of 5 mm to 50 mm and a density of 30 kg. /m ³ ~
It is in a dry floating bed structure characterized by a range of 300Kg/ ^m3 .

FIG. 1 is a partial configuration diagram of a dry floating floor structure according to the present invention, showing the floor structure of a building frame wall, in which a flooring material 3 is placed on a subflooring material 2 on which support legs 4 are attached.
The dry floating floor constructed by laying a concrete slab 11 is isolated from the wall surface 7 of the building frame and the baseboard 5 by the buffer material 1 arranged from the concrete slab 11 through the wall surface 7 of the building frame to the bottom of the baseboard 5. It is installed in the same condition. Furthermore, rubber elastic bodies 6 are attached to the ends of the flooring 3 in a scattered manner to prevent squeaks.

FIG. 2 shows the floor structure of the threshold. The dry floating floor is constructed by laying the floor material 3 equipped with rubber elastic bodies 6 on the subfloor material 2 equipped with support legs 4. The cushioning material 1 is disposed from the wall surface of the base 9 and the sill 8 to the height of the flooring 3 from the base 9 and the sill 8.

FIG. 3 shows the floor structure of a partition section, and the dry floating floor is constructed by laying a flooring material 3 equipped with rubber elastic bodies 6 on a subflooring material 2 equipped with support legs 4. Cushioning material 1 arranged from 11 to the bottom of baseboard 5 through the wall surface of partition plate 10
Therefore, it is installed in a state where it is cut off from the baseboard 5 and the partition board 10.

Here, in order to avoid the influence of the vibration of the flooring material of the dry floating floor and the subfloor material itself and the accompanying vibration of the underfloor air layer 14, the cushioning material 1 is preferably used for the flooring material 3 of the dry floating floor and the underfloor material. Air layer 1 formed not only on the building frame, partitions, sills, walls such as pillars, and the bottom of baseboards that come into contact with base material 2, but also under the floor.
It is arranged to extend to the surface in contact with 4.

FIG. 4 shows an example of a floor structure in which cushioning material is provided under the joist structure as well as on the wall surface of the partition plate and the bottom surface of the skirting board. A dry floating floor constructed by laying a subfloor material 2 equipped with the baseboards 5, 5, and 4 is constructed by the buffering material 1 disposed from the surface of the concrete slab 11, through the wall surface of the partition plate 10, to the bottom of the baseboard 5. It is arranged in a state where it is cut off from the partition plate 10 and the concrete slab 11. In addition, this type of construction method is
For example, it is effective when using support legs made of a material that easily resonates, such as plastic or wood, other than the generally used metal support legs equipped with vibration-proof rubber.

In addition, in the above, flooring material 3 and flooring material 2
However, there are cases where surface finishing materials such as carpets and tatami mats are further provided on the flooring material 3 (Figs. 1 to 3) or the subfloor material 2 (Fig. 4).
This surface finish is typically soft and does not contribute to the solid propagation of vibrations. However, when a rigid body is used as the surface finishing material, contact with wall materials and splints is blocked similarly to the flooring material 3. Furthermore, in the present invention, the expression "a laminate of flooring material and flooring material" does not mean that these are bonded together, and it is sufficient that they are simply stacked on top of each other, and the method of joining is not limited.

The cushioning material used in the present invention can be any material that can prevent the vibrations of the flooring and subfloor material from propagating through the solid body and the accompanying vibrations from the underfloor air layer from propagating to the surrounding walls. Generally, felts, soft communication foams (urethane foam, vinyl chloride foam, rubber foam, etc.),
Textiles and the like can be used alone or in combination of two or more, and among them, felts are particularly preferred.

Felts used in the present invention include those made of one or a mixture of animal/vegetable fibers, synthetic fibers, and mineral fibers, or those made of thermoplastic materials such as PVA, polyethylene, and phenolic resin. Alternatively, there are resin felts made by adding an organic binder of thermosetting resin, and typical examples thereof include linen felt, mixed wool felt, synthetic fiber felt, rock wool, and glass wool.

Further, it is also possible to use a woven fabric or the like by sewing a large number of fabrics at appropriate intervals, or by waving the fabric to entrain air inside. However, the thickness of the cushioning material is 5 mm to 50 mm, preferably 10 mm to 30 mm, and the density is 30 Kg/m ³ to 300
Kg/m ³ , preferably 50 Kg/m ³ to 200 Kg/m ³ is used. If the thickness is less than 5 mm and the density is less than 30 kg/ ^m3 , the sound absorption effect will not be sufficient; if the thickness is more than 50 mm, the density is 300
At Kg/m ³ or more, the effects are almost the same, making installation work difficult and increasing costs.

[Effect]

In conventional structures, when a soft impact object such as a tire applies an impact to the floor material (subfloor material), the vibration of the floor material and subfloor material itself is directly transmitted to the concrete slab and the surrounding wall of the room. In addition, the air layer formed between the floor material and subfloor material and the concrete slab vibrates, and the vibration propagates. At this time, the concrete slab, which has a large mass, can absorb the energy, but the materials used for the surrounding wall, such as wood, plywood, and plasterboard, which have a small mass, resonate, so the amplified vibrations propagate to the concrete slab. , soundproofing may not be achieved.

Therefore, a space is provided between the flooring material and flooring material and the peripheral wall surface of the member with which it comes into contact, and a cushioning material is provided in the space, so that the material can be moved from the flooring material and flooring material to the surrounding wall surface. In addition to preventing solid propagation, damping the vibrations of the flooring and subflooring materials with cushioning materials, and placing cushioning materials such as felt on the surrounding walls of members that are likely to resonate with the vibrations of the underfloor air layer. It is presumed that by creating a floor structure that blocks air vibrations and prevents vibrations from propagating to members that tend to resonate, it is possible to prevent weight impact sound from propagating.

〔Example〕

Example 1 In a 10 m ² Western-style room, we used Particle Sand German timber panels (thickness 6 mm) as the flooring material.
It is mounted on a concrete slab (thickness 130 mm) via support legs fitted with 70° cushion rubber.
Laminated flooring board (thickness 8mm) as flooring material
When adopting a dry floating floor structure constructed by constructing a dry floating floor, 10 mm thick mixed wool felt (density 100 kg/m ³ ) is laid on the walls, thresholds, partitions, and pillars of the room to create a dry floating floor flooring material. A tire impact test as specified in JIS-A-1418 was conducted using a floor structure in which the surrounding walls such as room walls, sills, partitions, and pillars were isolated from the subfloor material and underfloor air space.

As shown in Fig. 5, the result was a sound insulation grade of L-49 according to academic standards, and the dry floating floor structure was excellent in preventing the propagation of weight impact sound.

Example ² In a dry floating floor structure in which 12mm plywood was constructed as a flooring material in a 10m2 Western-style room through large drawers and joists, and a 5mm needle punch carpet was laid as a floor finishing material, the walls of the room, the threshold, 20mm thick rock wool (density 125Kg/m ³ ) is laid on the partitions, surrounding walls of columns and concrete slabs to create dry floating flooring and subfloor materials, underfloor air spaces, room walls and thresholds. The same measurements as in Example 1 were carried out using a floor structure in which the peripheral wall surfaces of the walls, columns, etc. were cut off, and the floor structure and the concrete slab were cut off.

As shown in Fig. 6, the result was a sound insulation grade of L-50 according to academic standards, and the dry floating floor structure was excellent in preventing the propagation of weight impact sound.

Comparative Example 1 This is a case where mixed wool felt is not used in the floor structure of Example 1. As a result of the tire impact test similar to Example 1, the sound insulation grade was L-58 according to academic standards.

Comparative Example 2 In the floor structure of Example 2, no rock wool was used. As a result of the same tire impact test as in Example 1, the sound insulation grade was L-60, which is the academic standard.

Comparative Example 3 In the floor structure of Example 2, rock wool was laid only on the concrete slab to isolate the floor from the concrete slab. The sound insulation grade according to academic standards in the same tire impact test as in Example 1 was L-56, which was poorer than in Example 2, in which insulation was achieved up to the peripheral wall surface.

〔effect〕

The dry floating floor structure according to the present invention not only prevents weight impact noise from propagating downstairs without increasing the thickness of the concrete slab, but also provides comfortable walking safety with excellent heat retention and insulation properties of the dry floating floor structure. It provides living space.

Furthermore, the present invention lays a cushioning material on the peripheral wall surfaces of building frames, thresholds, partitions, columns, etc. that are in contact with the flooring material of dry floating floors and the underfloor air layer, and if necessary, on the bottom surfaces of baseboards. In some cases, it can be effective just by laying it on the concrete slab surface.
It does not impose any restrictions on remodeling existing houses, and because it is easy to construct, it also contributes to reducing construction costs.

[Brief explanation of drawings]

1 to 4 are partial vertical sectional views of the dry floating floor structure according to the present invention, and FIGS. 5 and 6 are graphs of the propagated sound level with respect to frequency as a result of the tire impact test in the example. 1... Cushioning material, 2... Floor base material, 3... Flooring material,
4... Support leg, 5... Skirting board, 6... Rubber elastic body,
7...Wall part, 8...Threshold part, 9...Base, 10...
...Partition board surface, 12...Joist, 13...Double drawer, 1
4...Air layer.

Claims (1)

[Scope of Claims] 1. A dry floating floor structure in which a subfloor material or a laminate of a subfloor material and a floor material is laid on a concrete slab of a building frame structure via support legs, comprising: a building frame and , a space is provided between the members that partition the underfloor space, such as partitions, thresholds, and pillars, by blocking contact with the underfloor material or the laminate, and a cushioning material is provided in the space, and The buffering material is disposed at least along the wall surface of the building frame and the member from the concrete slab surface to the height of the floor base material or laminate, and the buffering material has a thickness of 5 mm to 50 mm. A dry floating bed structure characterized in that the density is within the range of 30Kg/m ³ to 300Kg/m ³ . 2. The dry floating floor structure according to claim 1, wherein the cushioning material is at least one selected from felts, soft communication foams, and textiles. 3. The cushioning material is a felt made of one or a mixture of two or more of animal fibers, vegetable fibers, synthetic fibers, and mineral fibers, or a resin felt made by adding an organic adhesive to the felt. The dry floating bed structure described in item 1. 4. A dry floating floor structure in which a subflooring material or a laminate of subflooring material and flooring material is laid through a joist structure installed on a buffer material laid on the surface of a concrete slab of a building frame structure. Then, a space is created between the building frame and members that partition the underfloor space such as partitions, thresholds, and columns by cutting off contact with the floor base material or laminate, and further buffering is provided in the space. the cushioning material in the air extends at least along the building frame and the wall portion of the member from the concrete slab surface to the height of the subfloor material or the laminate; The dry floating floor structure is characterized in that the cushioning material has a thickness in the range of 5 mm to 50 mm and a density in the range of 30 Kg/m ³ to 300 Kg/m ³ . 5. The dry floating floor structure according to claim 4, wherein the cushioning material is at least one selected from felts, soft communication foams, and textiles. 6. Claim No. 6, wherein the cushioning material is a felt made of one or a mixture of two or more of animal fibers, vegetable fibers, synthetic fibers, and mineral fibers, or range felt made by adding an organic adhesive to the felt. The dry floating bed structure described in Section 4.