JP2001146811A - Soundproof floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof floor structure capable of remarkably reducing a heavy floor impact noise. SOLUTION: This soundproof floor material 7 comprises a lower plate material 9, a plurality of impact cushioning members 10 and 11, and an upper member 12. The lower member is fixed to a floor lower structural body 3, the upper plate material is fixed to a floor upper structural body 4, and each impact cushioning member is disposed between the lower plate material and upper plate material. The impact cushioning member are separated from each other, a space 13 is formed in the horizontal direction, spring characteristics held by the impact cushioning members are selected from a group comprising linear spring characteristics, progressive spring characteristics, and constant load spring characteristics, and the spring characteristics of one impact cushioning member 10 are different from those of the other impact cushioning member 11. A floor bed material 5 has a bending strength of 13.0 N/mm2 or more by a JIS-A-5908 test and a thickness of 15 mm or more, and the weight of a floor upper structural body 4 per m2 is 40 to 100 kg.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel-framed house comprising a steel beam, an under-floor structure supported by the steel beam, and an over-floor structure on the under-floor structure. Related to soundproof floor structure.

[0002]

2. Description of the Related Art There has been a great demand for reduction of floor impact noise of buildings. Such floor impact sounds are distinguished into light floor impact sounds and heavy floor impact sounds.

[0003] Among such floor impact sounds, among them, a lightweight floor impact sound can be treated with little influence on the vibration source having a relatively small excitation force, and thus can be finished without being affected by the structure of the building itself. By taking measures against the floor material itself, it can be easily reduced. Now, such finished flooring is widely used as soundproofing flooring.

On the other hand, heavy floor impact noise can be easily improved by increasing the thickness of the floor slab in a building having a rigid structure such as RC structure, and therefore, measures are taken exclusively by increasing the thickness of the floor slab.

[0005] However, ordinary detached houses and low-rise apartment buildings are often made of conventional wooden structures, two-by-four, steel frames and the like, and have a flexible structure. Therefore, the above-mentioned method increases the rigidity of structural materials such as columns and beams. Due to the increased cost of increasing the weight of the floor, it has not been widely used. In addition, although the steel frame structure has rigidity compared with a two-by-four or a conventional wooden structure, there is a problem that vibration is easily propagated.

[0006] Further, since steel structures, two-by-four and conventional wooden structures are flexible structures having lower rigidity than RC structures, conventionally, the height of the beams is increased, and thus the rigidity of the floor is increased or the weight of the floor is increased. Or that is being done. In addition, with such a flexible structure floor, many experiments have been conducted with the ceiling as an independent ceiling to avoid resonance, further increase the sound insulation by attaching additional ceiling materials, and providing a wall inside the lower floor room wall. However, there is no known method that can be used and can satisfy both sound performance and cost.

[0007]

SUMMARY OF THE INVENTION The present inventor has proposed that the floor itself,
Various soundproofing measures were considered, such as the method of supporting and fixing the floor, the use of the floor / ceiling space, the method of supporting the ceiling, and the improvement of the ceiling itself. As a result, it was clarified that the floor impact noise was reduced by absorbing and relaxing the excitation force of the floor impact source.

Conventionally, a wet-type floating floor has been used in which a buffer layer such as a foam is laid on the entire surface of a floor slab and a concrete layer having a thickness of 60 mm or more is formed on the entire surface thereof. It has been pointed out that the seam sickness occurs due to the softness of the buffer layer such as a foam, and it is hardly used at present. On the other hand, this wet floating floor is not preferable because it has a problem of weight increase, and a detached house or a low-rise house is structurally too burdensome.

[0009] As a dry double floor, about 1
There is a method of arranging floor base materials provided with anti-vibration rubber legs at four corners of a plate material having an m-square position, and forming a floor therefrom using a discarded material or a finishing material. However, since such dry double floors are not fixed one by one to the lower floor slab, they are lifted from the floor slab by the reaction force of the impact, and are hit twice or have only a single spring characteristic. It has a drawback that it cannot be sufficiently absorbed because it is constructed and the rubber vibration proof legs are smaller than the floor area.

[0010] In such a conventional technology, cost, and flexible structure building detached and low-rise collective housing is mainly from practical plane, the reduction of heavy floor impact sounds (especially, L _H -55) sufficient Therefore, the emergence of a floor structure that is satisfactory in terms of practicality, including cost, has been awaited.

[0011] It is an object of the present invention to provide a soundproof floor structure capable of remarkably reducing heavy floor impact noise by separating and dispersing the impact force of a heavy floor impact source in a detached house or low-rise apartment house made of steel. I do.

[0012]

The present invention comprises a steel beam, an under-floor structure supported by the steel beam, and an over-floor structure on the under-floor structure. The structure is formed from a floor panel or a floor slab including a plate-like body and a joist, and the floor upper structure is formed from a floor covering material and a floor finishing material on the floor covering material. A sound-insulating floor structure for a steel structure house, wherein a plurality of sound-insulating floor members are arranged between the under-floor structure and the over-floor structure, and when the sound-insulating floor structure is viewed in a longitudinal section, Each of the soundproof floors is separated from each other, and a space is provided in a horizontal direction between each of the soundproof floors, and each of the soundproof floors includes a lower plate, a plurality of impact buffer members, and an upper plate. The lower plate is fixed to the lower floor structure, and the upper plate is mounted on the floor. It is fixed to a structure, each of the shock absorbing members is disposed between the lower plate and the upper plate, the respective shock absorbing members are separated from each other, and between each of the shock absorbing members A space is formed in the horizontal direction, each of the shock absorbing members has a spring characteristic, and the spring characteristic is selected from the group consisting of a linear spring characteristic, a progressive spring characteristic, and a constant load spring characteristic, The spring characteristic of one of the shock absorbing members is different from the spring characteristic of the other shock absorbing member, and the floor base material is 13.0 N in a JIS-A-5908 test.
/ M ² or more and a thickness of 15 mm or more, and the weight of the floor superstructure per 1 m ² is 40.
The present invention relates to a soundproof floor structure characterized by being weighed up to 100 kg.

The present inventors have studied a structure for absorbing and relaxing the exciting force of a floor impact source. As a result, the present inventors have found that the provision of the soundproofing floor material between the existing floor slab and the plate-like discard material significantly reduces the heavy floor impact sound of the floor structure.

In such a sound-insulating floor structure, a plurality of sound-insulating floor materials are provided at a distance between a plate-like waste material serving as a base for forming a floor and a floor slab, and the floor impact force is absorbed by these sound-insulating floor materials. In addition to the relaxation, in the space between the sound-insulating floor materials, the plate-like waste material directly receiving the impact force itself undergoes deformation vibration at a frequency lower than the frequency at which the problem occurs, thereby increasing the load on the floor slab. The transmission of vibration force is reduced, and the sound radiation from the floor slab is significantly reduced.

Further, the present inventors have found that the force of heavy floor impact is 4
If the impact force is not sufficiently buffered by the floor structure, if the ceiling is hung from a beam or floor joist with a suspension tree, the ceiling may resonate or radiate from the walls of the lower floor room. It was determined that the sound affected the heavy floor impact sound.

The inventors of the present invention have studied the countermeasures against such noise.
It has been found that there is an increase in cost, and in some cases it is necessary to increase the ceiling space, and as a result, the ceiling height of the room becomes low, causing problems such as a feeling of oppression. On the other hand, taking measures such as forming a wall inside the wall in order to prevent sound radiated from the wall results in inappropriate results in terms of cost and practicality.

As a result of intensive studies based on such findings, the present inventors have found that the flooring material is one in JIS-A-5908 test.
It has a bending strength of 3.0 N / mm ² or more, a thickness of 15 mm or more, and a weight per 1 m ^{2 of} a floor upper structure formed from a floor covering material or a floor finishing material of 40 to 100.
It has been found that a heavy floor impact sound can be further improved if the weight is kg.

If the bending strength and thickness of the floor base material are large and the mass of the upper floor structure is large, the deformation and vibration of the upper floor structure are suppressed, and the loss of impact energy due to the deformation of the upper floor structure increases. Therefore, it is considered that the amount of improvement in the heavy floor impact sound is increased.

However, the present inventors have researched and found that a flooring material having a large bending strength and thickness is hardly deformed locally and deforms in a much larger area. It has been found that even more energy loss occurs in order to do so.

Further, the present inventors have found that when the mass of the upper floor structure is large, deformation and vibration of the upper floor structure are less likely to occur.
Completed the present invention by finding out that the spring characteristics of each shock absorbing member of the soundproofing floor material work effectively, and the vibration energy is distributed over the entire floor upper structure, and the vibration energy can be more efficiently lost. I let it.

In the sound-insulating floor structure of the present invention, a plurality of sound-insulating floor members are provided between the upper floor structure directly receiving the impact and the lower floor structure having the original strength of the floor. Each of the soundproof floor materials is provided so as to be separated from each other and to create a space in the horizontal direction. In the sound-insulating floor structure of the present invention, the energy loss caused by the deformation of the upper floor structure in the space between the sound-insulating floor members and the dispersion of the impact energy caused by the dispersal of the impact force to the plurality of sound-insulating floor members. Thus, the impact force transmitted to the underfloor structure is significantly suppressed, and the heavy floor impact sound is significantly reduced.

In the soundproof flooring according to the present invention, a plurality of shock absorbing members are provided between the lower plate and the upper plate. The respective shock absorbing members are separated from each other, and a space is formed between the respective shock absorbing members in the horizontal direction. Each shock absorbing member has a spring characteristic, and the spring characteristic is selected from the group consisting of a linear spring characteristic, a progressive spring characteristic, and a constant load spring characteristic. Among the plurality of shock absorbing members, the spring characteristics of one shock absorbing member are different from the spring characteristics of the other shock absorbing member.

According to the present invention, such shock-absorbing members have different spring characteristics and exhibit an independent buffering action. Since the shock absorbing member moves without exhibiting the same reaction force at the same time due to the difference in spring characteristics, the shock absorbing member can have a larger deformation resistance force with a shorter displacement amount.

As a result, the sound-insulating floor structure of the present invention using such a shock-absorbing member has a large shock-absorbing force, and the vibration itself of the upper floor structure is easily attenuated. .

Further, in the present invention, the floor base material is JIS-
It has a flexural strength of 13.0 N / mm ² or more in an A-5908 test, has a thickness of 15 mm or more, and has a thickness of 1 m ² per 1 m ^{2 of} a floor upper structure formed from a floor base material or a floor finish material. Since the weight is 40 to 100 kg, the underfloor structure is heavy and difficult to vibrate as a whole, and the displacement of the underfloor structure is reduced even though the partial displacement of the underfloor structure is reduced. Floor impact noise can be reduced.

In the sound-insulating floor structure of the present invention, a plurality of sound-insulating floor members are provided between the upper floor structure and the lower floor structure so as to be separated from each other. Absorbing and relaxing the force, and providing a plurality of shock-absorbing members having different spring characteristics between the upper plate and the lower plate to attenuate the vibration of the floor upper structure, and a predetermined bending strength. By using the floor base material having thickness and thickness, by increasing the weight of the upper floor structure, by suppressing the vibration of the lower floor structure, it is possible to significantly improve the walking feeling on the upper floor structure, The low frequency noise generated from the underfloor structure can be significantly reduced.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a soundproof floor structure according to an example of the present invention. FIG. 2 is a plan view of the soundproof floor structure of FIG. FIG. 3 is a plan view of an example of a soundproof flooring material according to the present invention.
FIG. 4 is a side view of the soundproof flooring material of FIG. FIG. 5 is a plan view of an example of the shock absorbing material according to the present invention. FIG.
(A) is sectional drawing which cut | disconnected the shock absorber of FIG. 5 by the AA, and was seen. FIG. 6B shows the shock absorber of FIG.
FIG. 4 is a cross-sectional view taken along line B. FIG. 6C shows FIG.
FIG. 4 is a cross-sectional view of the shock absorbing material of FIG.

As shown in FIG. 1, the sound-insulating floor structure 1 of the present invention
Is a soundproof floor structure for a steel-framed house,
An under-floor structure 3 supported by the steel beam 2 and an over-floor structure 4 on the under-floor structure 3 are provided.

The underfloor structure 3 is formed from a floor panel or a floor slab having a plate-like body and a joist. Further, the upper floor structure 4 is formed of a floor base material 5 and a floor finish material 6 on the floor base material 5.

As shown in FIGS. 1 and 2, a plurality of soundproof floor members 7 are arranged between the underfloor structure 3 and the underfloor structure 4. These sound-insulating floor members 7 are separated from each other when the sound-insulating floor structure 1 is viewed in a longitudinal section, and a space 8 is provided in the horizontal direction between the sound-insulating floor members 7.

As shown in FIG. 3 and FIG.
Includes a lower plate 9, a plurality of shock absorbing members 10, 11, and an upper plate 12. As shown in FIG. 1, the lower plate 9 is fixed to the lower floor structure 3 and the upper plate 12
Are fixed to the floor upper structure 4.

As shown in FIGS. 1 and 4, each of the shock absorbing members 10 and 11 is disposed between the lower plate 9 and the upper plate 12 and is separated from each other. A space 13 is formed.

Each of the shock absorbing members 10 and 11 has a spring characteristic, and the spring characteristic is selected from the group consisting of a linear spring characteristic, a progressive spring characteristic, and a constant load spring characteristic. The spring characteristics of one shock absorbing member 10 and the spring characteristics of the other shock absorbing member 11 are different.

The underfloor material 5 has a bending strength of 13.0 N / mm ² or more and a thickness of 15 mm or more in a JIS-A-5908 test, and a weight per 1 m ^{2 of the} upper floor structure 4. Is 40-100 kg.

When a heavy impact source falls on the soundproof floor structure 1 of the present invention, the heavy impact source deforms the floor finishing material 6 and the floor base material 5 with a larger radius of curvature while deforming itself. . At this time, if the floor finishing material 6 is a flooring material and is fixed to the floor base material 5 with a floor nail,
Part of the impact force is consumed as energy for deforming the upper floor structure 4.

When an impact is applied between the sound-insulating floor members 7, the upper floor structure 4 is allowed to be deformed at that location. The deformation is restored by receiving the bending deformation stress of the upper plate material 12 fixed to the floor base material 5, and the impact energy is lost.

In this case, the deformation of the upper plate 12 is as follows.
Shock absorbing member 1 sandwiched between upper plate 12 and lower plate 9
At 0,11, a part undergoing compressive deformation and a part subject to tensile deformation are generated. This also results in a loss of impact energy.

In other words, these deformations of the shock absorbing members 10 and 11 are caused by resistance to compression and tensile deformation due to the spring characteristics, and are further recovered by different deformation resistances caused by the difference in spring characteristics. To lose.

When an impact is applied directly above the soundproof floor member 7, each of the shock absorbing members 10 and 11 undergoes compression deformation with almost no tensile force, and exhibits a plurality of different deformation resistance forces due to differences in spring characteristics. , The impact energy is lost.

When the heavy impact source moves away from the upper floor structure 4, the upper floor structure 4 composed of the floor finishing material 6 and the floor base material 5 bends in the opposite direction due to the reaction force that has been compressed and deformed.
The force for restoring the upper floor structure 4 to a smooth state works, and the impact energy stored in the upper floor structure 4 is lost.

At this time, the upper plate member 12 of the soundproof floor member 7 is released from the bending stress, and is restored by the force of bending in the opposite direction. Further, a tensile force acts on the shock absorbing members 10 and 11 that are compressed between the upper plate 12 and the lower plate 9, causing a loss of impact energy and restoring.

In the present invention, as shown in FIGS.
The soundproof flooring 7 is made up of at least two kinds of shock absorbing members 10 and 11.
One of the shock absorbing members 10 is an upper plate 12
And the other shock absorbing member 11 is
When the impact is applied to the upper floor structure 4, the other shock absorbing member 11 and the upper plate 12
Preferably contact with

According to the present invention, as shown in FIGS. 1 and 4, at least one of the space between the upper floor structure 4 and the upper plate 12 and the lower plate 9 and the lower floor structure 3 is provided with a shock absorbing member. Preferably, members 15 and 16 are provided.

Further, in the present invention, as shown in FIGS. 1 and 2, the under-floor structure 3 is formed by horizontally joining a plurality of under-floor structure pieces 3a, and It is provided on the joint 3b of the underfloor structure piece 3a,
It is preferable that 25 to 90% of the length of the joint 3 b is covered with the lower plate 9.

The underfloor structure 3 becomes heavier as a whole due to the mass of the underfloor structure 4, and if the joints 3 b of the underfloor structure pieces 3 a are connected and integrated one after another with the lower plate 9, the whole is hardly vibrated as a whole. Therefore, the soundproof floor structure 1 can greatly reduce the floor impact force as a whole.

In the present invention, as shown in FIG. 1, it is preferable that an impact-reducing material 17 is interposed between the steel beam 2 and the underfloor structure 3. The shock absorbing member 17 includes a flat base material 17a and a plurality of convex portions 17b and 17c.
Each of the protrusions 17b, 17c is provided on at least one of the front surface and the back surface of the base material 17a.
Is provided at a predetermined height from the front surface or the back surface of the base material, and on the front surface or the back surface of the base material, one convex portion 17c having a relatively high height, and one convex portion 17c The difference between the height of the other protruding portion 17b having a high height is 5 to 50% of the height of the one protruding portion 17c, and the one protruding portion 17c is in contact with the underfloor structure 3 or the steel beam 2. And the other convex portion 17b
A gap 18 is formed between the steel sheet 2 and the underfloor structure 3 or the steel beam 2, and each of the projections 17b and 17c is formed from a raw material containing polynorbornene rubber, a tackifying resin, and a softener. And the specific gravity of each convex portion 17b, 17c is 1.3.
It is preferable that when an impact is applied to the soundproof floor structure 1, the other convex portion 17b comes into contact with the under-floor structure 3 or the steel beam 2, and the other convex portion 17b is compressed and deformed.

Further, according to the present invention, the sound insulation plate 19 is provided on the floor base material 5 between the floor base material 5 and the floor finish material 6, and the discarding plate 20 is provided on the sound insulation plate 19. In accordance with the bending strength test of the flooring specified by the Japan Agriculture and Forestry Standards Association (JAS Association), the floor upper structure 4 is required to have a bending strength at which the difference in deflection between the 3 kg load and the 7 kg load is 3.5 mm or less. It is preferred to have.

Further, in the present invention, at least one portion between the soundproof floor members 7 and the upper surface of the peripheral portion of the underfloor structure 3 is provided.
A supporting material is provided, the supporting material supports the upper floor structure 4, and when an impact is applied on the upper floor structure 4, the supporting material allows displacement of the upper floor structure 4. preferable.

Hereinafter, components of the soundproof floor structure of the present invention will be described. The soundproof floor structure of the present invention is a floor supported by steel structure beams. The steel structure material of such a steel beam is a steel frame material generally used for a steel-framed building, and may have the necessary strength for each part, and there is no particular limitation, but rust prevention treatment can be performed by painting or the like. .

The under-floor structure can be provided on the steel beam directly or via an impact-reducing material.

The impact-absorbing material may be made of a foam of various materials, a fibrous material such as felt or non-woven fabric, a rubber or polymer granule, a rubber foam or a polymer foam, alone or in combination, and integrally molded with a binder. It is possible to use a porous body such as cork, cork or the like, a rubber viscoelastic body alone or in a laminated form, or a molded article having various shapes.

[0052] At least one surface of the shock absorbing material is
It is preferable to have a convex portion made of a high vibration damping material, and more preferable to have a plurality of convex portions having different heights.

It is preferable to use a rubber component to form such a convex portion. Of the rubber component, 5 to 30 parts by weight of polynobonene rubber is contained, and 100 parts by weight of the rubber component is contained. It is preferably prepared from a raw material containing 7 to 25 parts by weight of a tackifier resin and 10 to 30 parts by weight of a softening agent, and the specific gravity is preferably 1.3 to 1.8. This is because good results can be obtained as a shock absorbing material.

Although polynorbornene rubber is expensive in exhibiting high vibration damping, it can exhibit its effect very efficiently. Further, when 5 to 30 parts by weight of the polynorbornene rubber is used out of 100 parts by weight of the rubber component as the raw material of the convex portion, the impact mitigation performance and the cost are both in a suitable range.

If the polynorbornene rubber is less than 5 parts by weight, the vibration damping performance is insufficient, and the vibration damping performance in the room temperature region is deteriorated even when adjusted with various other components. On the other hand, when the amount exceeds 30 parts by weight, the vibration damping performance in the room temperature region is good, but a wide temperature range cannot be covered, and the cost is extremely high, so that it is not practical.

Other rubber components can be used as the raw material of the convex portion. For example, EPT, NBR, CR, BR,
Rubber such as SBR, IR, NR, polyisobutylene, and recycled rubber may be used alone or in combination.

The high vibration damping property of the projection can be further enhanced by the method described below. Specific examples thereof include mixing a tackifier resin and a softening agent, and setting the specific gravity of the convex portion within an appropriate range.

Specific examples of the tackifying resin include terpene resin, terpene phenol resin, cyclopentadiene resin, alkylphenol resin, rosin, modified rosin, aliphatic hydrocarbon resin, petroleum resin, xylene resin, cumarone resin and the like. be able to.

The amount of the tackifier resin is preferably 7 to 25 parts by weight based on 100 parts by weight of the rubber component. 7
When the amount is less than the weight part, the vibration damping property is deteriorated as the amount is reduced, which is not preferable. Conversely, if it exceeds 25 parts by weight, the low-temperature characteristics deteriorate, which is not preferable.

Examples of the softener include paraffinic, aroma and naphthenic oils, phthalic acid derivatives, adipic acid derivatives, aleic acid derivatives, polybutenes, tall oils and the like. These may be used alone or in combination. And use it.

The amount of the softener is 100 parts by weight of the rubber component.
10 to 30 parts by weight with respect to parts by weight is suitable. When the amount is less than 10 parts by weight, the vibration damping property deteriorates as the amount decreases, which is not preferable. Conversely, if it exceeds 30 parts by weight, the peak temperature of the vibration damping property shifts too much to the low temperature side, which is not preferable

The specific gravity of the projection has a relatively large effect on the vibration damping. A preferred range is from 1.3 to 1.8.
If it is less than 1.3, the vibration damping performance tends to deteriorate as the specific gravity gradually decreases, and the compression set also increases. Conversely, if it exceeds 1.8, there is no advantage in performance, the elongation performance and the tensile / compression repetition performance deteriorate, and it is not preferable in terms of durability.

If a plurality of such projections are provided with different heights, when receiving a compressive deformation due to an impact, the higher one absorbs the impact first, and the lower one absorbs the impact gradually. Is maintained high, the displacement can be minimized, and the vibration isolation effect is enhanced.

The underfloor structure according to the present invention will be described. The underfloor structure referred to in the present invention is a floor structure supported by steel beams. There is no particular limitation on the underfloor structure as long as it does not hinder the work thereon.

As a specific example of the underfloor structure, ALC
Inorganic slabs such as slabs, PC plates, hollow extruded cement plates, etc.,
Alternatively, those obtained by applying mortar to them over 10 mm to 30 mm can be cited.

The underfloor structure may include a particle board, a plywood, an iron plate, on and / or below the inorganic slab.
A plate-like material obtained by mixing and molding asphalt and a high-specific-gravity material, a plate-like material such as a rubber or polymer high-specific-gravity sheet, a sheet or the like, or a single-layer or a plurality of layers may be laminated. The laminating means at this time may be physically fixed with screws or nails, may be chemically fixed with an adhesive or an adhesive, or may be used in combination.

At this time, in the present invention, it is preferable to install the bridge so as to bridge between the adjacent substructures with a plate. By integrating the underfloor structure, it becomes difficult for the underfloor structure to move, so that the soundproof floor structure can be stabilized and the sound performance can be improved.

In particular, inorganic slabs such as ALC plates are usually
It is common to apply mortar thereon and integrate the floor slab. Therefore, if the plate is fixed on the seam between the floor slabs, or if the seam between the floor slabs is connected and fixed with the lower plate of the soundproofing floor material as in the present invention, the mortar is not particularly necessary, and the completely dry method is adopted. can do. In such a completely dry method, the steps of applying and drying the mortar can be shortened, so that there are great merits in terms of work period and cost.

The underfloor structure according to the present invention may be a wooden floor panel. Such floor panels are composed of joists and plate-like bodies. The underfloor structure may be a structure in which beams are used to support joists, or a structure in which a perimeter is surrounded by a wooden frame and plate-like bodies are fixed in places by joists or lattices. It may be provided.

In the case of such an underfloor structure, it is necessary to take measures to prevent the drum phenomenon from occurring due to resonance of the plate-like body due to floor impact. Specific examples of the preventive measures include using a perforated plate, increasing the mass of one plate to make it difficult to vibrate, filling sound-absorbing material in the inside, and using the above-described method between gypsum boards. May be interposed at arbitrary dimensions, and a dynamic vibration absorbing structure in which a weight is provided between the springs of the sound absorbing material.

In the case of such a wooden underfloor structure, a metal plate or a metal plate obtained by bending a metal plate is used, and a nail or a screw is used to impart rigidity to the joist and the frame. Is also effective for improving the sound performance. Further, as with the inorganic floor slab, the plate-like body can be formed by laminating various plate materials, and can be fixedly integrated by crossing between adjacent wooden floor-based structures in a bridging manner.

The soundproof flooring material according to the present invention will be described. Such a soundproof floor material is composed of a lower plate material and an upper plate material and an impact buffering member having a linear spring characteristic, a progressive spring characteristic or a constant load spring characteristic therebetween.

The lower plate member and the upper plate member may be basically plate-like materials of various materials. Specific examples are iron,
Plates of metals and alloys such as copper, brass, aluminum and stainless steel, polyethylene, polypropylene, polyester,
A plate material of a polymer such as polystyrene, nylon, polycarbonate, or ABS, a plywood, a laminated material, or a plate material such as wood may be used alone or in combination.

The metal plate as the lower plate or the upper plate may be coated with plating, rubber or polymer. Such a metal plate may be coated with plating, rubber, or a polymer, and may be provided with rigidity by bending two or four sides of the plate, or may be provided with a stop hole for the underfloor structure in advance. May be.

The plate material of the polymer may be FRP, or may be a material provided with rigidity by impregnating or impregnating a braid, woven fabric, or nonwoven fabric.

An impact absorbing material may be interposed on the contact surface between the lower plate and the underfloor structure or the contact surface between the upper plate and the underfloor structure. In particular, if the material of the lower plate material or the upper plate material in contact with the underfloor structure or the overfloor structure is different, there is a risk of generating abnormal noise when walking, so a shock absorbing material is provided in advance. It is desirable.

Specific examples of such a shock absorbing material include rubber, polymer, foam, felt, and nonwoven fabric. Such an impact absorbing material can exert its effect sufficiently even if it is provided entirely or partially on the contact surface between the lower floor structure or the upper floor structure and the lower plate material or the upper plate material.

The lower plate is fixed at least between the adjacent sub-floor structures, and the sum of the lengths at which the lower plate bridges the seams between the sub-floor structures is equal to 25 joints between the sub-floor structures.
A preferred range is a length of ９０90%, more preferably 35-80%. If less than 25%
It is not preferable because the degree of fixation becomes low and the amount of improvement at 63 Hz tends to deteriorate. Conversely, even if it exceeds 90%, 6
The improvement effect of 3 Hz or 125 Hz becomes saturated, and other advantages are not generated, and the cost increases, which is not preferable. The length of the seam between the underfloor structures used in the present invention does not include the outermost circumference of the combined underfloor structure, and the underfloor structure piece when the underfloor structure pieces are adjacent to each other Say the length of the seam.

The shock absorbing member having linear spring characteristics according to the present invention has a spring characteristic in which the relationship between the amount of displacement with respect to the compressive stress and the amount of displacement is linearly deformed in the region between the upper plate and the lower plate. Specifically, a coil spring, a conical spring, and the like can be given.

The material of the shock absorbing member having linear spring characteristics includes spring steel, hard steel wire, piano wire, oil-tempered wire, stainless steel wire for spring, brass wire, nickel silver wire, phosphor bronze wire, helium copper wire. , Etc., and there are no particular restrictions. A conical spring that does not strike the bottom even when the height is reduced because it is used for the floor can be set to a small amount of displacement, which is advantageous.

The shock-absorbing member having the progressive spring characteristic has a characteristic that the relationship between the displacement and the compressive stress in the region between the upper plate and the lower plate is such that the compressive stress suddenly increases as the displacement increases. Have Vulcanized rubber of various materials can be exemplified.

The shock-absorbing force of the shock-absorbing member can be arbitrarily determined by the rubber hardness and the shape and size, and by the number used for one sound-insulating floor member.

The shock absorbing member having a constant load spring characteristic is as follows.
The relationship between the compressive stress and the displacement is a certain constant compressive stress even if the displacement amount is increased in a certain displacement range, but has a spring characteristic that the compressive stress suddenly increases as the displacement amount further increases. . Specifically, a bulky fiber-based material and a bulky foam-based material can be exemplified.

The characteristics of the sound-insulating flooring material according to the present invention are greatly influenced by the shock absorbing member. If only one type of impact buffering member is used, each impact buffering member acts as the same resistance component, so that the impact buffering operation has a limit. Therefore, in the present invention, two or more types of shock absorbing members having different spring characteristics are used in combination and separated and used in parallel, thereby dispersing the impact force, acting as different resistance components, and using a smaller displacement amount. Reduce impact force.

The shock absorbing members having these spring characteristics need to contact the upper plate and the lower plate, but it is not necessary that all the shock absorbing members be fixed to the upper plate and the lower plate. In other words, when the shock absorbing member is in service, at the moment of receiving an impact, or at the moment when the impact source separates from the floor surface, it reverses due to the reaction force. If the force can be used for loss of impact energy, it is not necessary to be fixed to the upper plate and the lower plate.

However, each of the shock absorbing members is designed to prevent lateral displacement and to stably provide shock absorbing performance.
At least one of the upper plate and the lower plate must be fixed. The shock absorbing member can be fixed through various fixing jigs.

A plurality of shock absorbing members are used in parallel. At this time, a difference in height is provided between the shock absorbing members,
By shifting the time when the resistance component due to the spring characteristics of one shock buffering member starts to act and the time when the resistance component of the other shock buffering member acts, it is possible to adjust the impact force reduction. This is effective for reducing the impact force with a particularly small displacement amount.

The support according to the present invention will be described.
Such a support material is made of a hard foam such as hard urethane, styrene, phenol, or the like, or a perimeter or top and bottom of wood or the like, for a total of 1
With a thickness of 0 mm or more, preferably 20 mm or more, felts, nonwoven fabrics, foams of various rubbers, those provided with foams such as polyethylene, polypropylene, EVA, and soft urethane, and thick nonwoven fabrics having excellent resilience are used. The one provided alone is used.

It is preferable that such a supporting material is provided at an arbitrary size and at an interval between the upper surface around the underfloor structure and the soundproofing floor material. Such a support material does not adversely affect the floor impact sound, and against a large load such as a partition wall or furniture.
This is effective in preventing the floor from sinking extremely, and avoiding the influence of the sideway propagation sound, and at low cost, it is possible to prevent the walking feeling from being uncomfortable.

It is desirable that such a supporting member is set thicker than the thickness of the shock absorbing member and is used in a state of being compressed in advance. In other words, since the felt, the nonwoven fabric, and the soft foam exhibit the constant load spring characteristic, the constant load spring characteristic can be exerted by compressing and creating a constant load condition in advance even if the compression set is received. .

The thickness of the support is required to be 10 mm or more. If the thickness is less than 10 mm, the floor impact sound may be deteriorated. The thickness of such a supporting material is more desirably 20 mm or more.

[0092] The preferable material for the support material is, in particular, a material in which the melting points of the fibers in the non-woven fabric are made different and mixed, and heat treatment is performed during the processing, so that a large number of fusion reinforcing points are provided between the fibers. Can be mentioned. Such supports are
Particularly excellent in compression / restoration.

[0093] The floor upper structure according to the present invention will be described. Such a structure above the floor greatly affects the displacement amount of the floor and the heavy floor impact sound, and is a very important component. The upper surface of such a floor upper structure is a part where a person walks directly, and is a part concerning the problem of whether or not the soundproof floor material can be used effectively.

That is, the sound-absorbing floor material is bridged by the floor base material at the lowermost part of the upper floor structure.
This is because the displacement and vibration of the upper floor structure are closely related to the generation of the heavy floor impact sound.

When the bending strength of the floor base material is insufficient, the displacement of the portion not supported by the soundproof floor material particularly between the soundproof floor materials becomes too large, and the walking feeling is remarkably deteriorated.

The flooring material according to the present invention has a bending strength of 1
3.0 N / mm^Two With the above materials, the thickness is more than 15mm
is there. Flexural strength of 13.0N / mm^Two If the thickness is less than
Even if it is 15 mm or more, the amount of deformation is large. Also,
Flexural strength of 13.0N / mm ^Two Even if it is more than
If it is less than 15 mm, the amount of deformation increases.

As such a floor base material, a particle board, a plywood, a hollow extruded cement plate or the like can be used. The floor base material can be fixed to the upper plate of the soundproof floor material with nails, screws, or the like.

The upper floor structure can be laminated and integrated with floor nails. In this case, when an inorganic board is used as a floor base material, a wood-based board can be used together. .

Since the underfloor material undergoes the greatest bending deformation when subjected to an impact or load on the floor, it is necessary to increase the flexural strength of the underfloor material and increase its thickness. It is extremely important to suppress the deformation of.

The floor upper structure according to the present invention is integrated and deforms only in a large area, and can disperse impact energy over a wider range. Such widely dispersed impact energy is effectively lost with the soundproof flooring of the present invention, and heavy floor impact noise is significantly reduced.

In the upper floor structure according to the present invention, a sound insulating plate having a high specific gravity can be provided on a floor base material. On such a sound insulating plate, a discarded material such as a particle board is provided to increase the weight. A commonly used floor finishing material can be placed thereon and laminated and integrated.

The overall structure of the upper floor structure according to the present invention has a difference in deflection between a load of 3 kg and a load of 7 kg in a bending test prescribed in Japanese Agricultural Standards Flooring.
Preferably it is 3.5 mm or less.

In the present invention, the upper floor structure has a mass of 40 to 100 kg per m ² as a whole. If the floor upper structure is less than 40 kg, the weight floor impact sound becomes worse as it becomes lighter. On the other hand, if it exceeds 100 kg, the load on the structural frame increases, and the cost of the upper floor structure and the spring characteristic portion increases, which is not practical. On the other hand, increasing the number of soundproof flooring materials is not practical from the viewpoint of cost increase and workability.

[0104]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically based on embodiments and comparative examples with reference to the drawings. FIG. 7 is a sectional view of a soundproof floor structure according to another example of the present invention. FIG.
FIG. 2 is a plan view of the soundproof floor structure of FIG. FIG. 9 is a plan view of another example of the soundproof flooring material according to the present invention. FIG. 10 is a side view of the soundproof flooring material of FIG. 9.

FIG. 11 is a sectional view of still another example of the soundproof floor structure according to the present invention. FIG. 12 is a cross-sectional view of an example floor panel according to the present invention. FIG. 13 is a side view of a state in which the floor panel of FIG. 12 is suspended on beams. FIG. 14 is a plan view of another example of the shock absorbing material according to the present invention. FIG.
FIG. 5 is a side view of the shock absorbing material of FIG. FIG.
It is a top view of the soundproof flooring of another example concerning the present invention.
FIG. 17 is a side view of the soundproof flooring material of FIG. 16. FIG.
FIG. 12 is a plan view of the soundproof floor structure in FIG. 11.

FIG. 19 is a sectional view of still another example of the soundproof floor structure according to the present invention. FIG. 20 is a cross-sectional view of another example of the floor panel according to the present invention. FIG. 21 is a side view of a state where the floor panel of FIG. 20 is suspended on beams. FIG.
It is a top view of the soundproof flooring of another example concerning the present invention.
FIG. 23 is a plan view of the soundproof floor structure of FIG. FIG.
FIG. 3 is a sectional view of an example of a floor structure according to a comparative example. FIG.
FIG. 5 is a cross-sectional view of another example of the floor structure according to the comparative example.

Example 1 A soundproof floor structure as shown in FIGS. 1 and 2 was manufactured. 5 and FIGS. 6A to 6A on the H-shaped steel beam 2 of the steel structure house
A shock absorbing material 17 as shown in FIG.
Both ends of the short side of the ALC floor slab 3a having a thickness of 606 mm, a width of 606 mm and a length of 1810 mm were suspended.

The ALC floor slab 3a is used as the under-floor structure 3, and the sound-insulating floor material 7 shown in plan and side views in FIGS.
As shown in FIG. 2, the center of the ALC floor slab 3a and the short side and the long side of the
The adjacent ALC floor slabs 3a were mounted at a 55 mm pitch with screws of 90 mm length, and the lower plate 9 of the soundproof flooring 7 was attached and fixed so as to bridge the ALC floor slab 3a. Note that A
A shock absorbing material 16 is provided between the LC floor slab 3a and the lower plate material 9.
A 2 mm thick non-vulcanized butyl rubber sheet was interposed.

Next, a particle board of 15 mm thickness × 909 mm width × 1818 mm length was used as the floor base material 5 of the upper floor structure 4 in a direction perpendicular to the length direction of the ALC floor slab. It was installed on the upper plate 12 of the floor 7 and was fixed with wood screws. In addition, a 10-fold foamed polyethylene sheet having a thickness of 2 mm as a shock absorbing material 15 was stuck upward between the floor base material 5 and the upper plate material 12.

An 8 mm thick specific gravity 2.
5 as the asphalt-based vibration damping material 19, and a 9 mm thickness × 909 mm width × as a discarding material 20 in a direction orthogonal to the length direction of the particle board of the floor base material 5.
Laying 1818mm length particle board,
On top of that, as the floor finishing material 6, 12 mm thick x 303 m
An upper floor structure 4 is formed by driving a floor nail 33 from a male real part of the flooring material so that the flooring material of m width × 1818 mm length reaches the 15 mm thick particle board of the floor base material 5. Structure 1 was manufactured.

The shock-absorbing material of this example used a plan view and a cross-sectional view shown in FIGS. 5 and 6 (a) to 6 (c). It was produced using Formulation Example 1 as a raw material.

[0112]

[Table 1]

The soundproof flooring material of this example is a 12 mm thick plywood for both the upper and lower plate materials, and the lower plate material is 300 mm.
mm square, and the upper plate material was 225 mm square. As shown in FIGS. 1, 3 and 4, between the upper plate and the lower plate, a conical coil spring serving as an impact buffering member 11 having a linear spring characteristic is fixed at three centers by three claws 21. And the four corners of the lower plate 9 were fixed with wooden screws 23.

On the other hand, in the vicinity of the four corners of the upper plate 12, a shock-absorbing member 10 having a progressive spring characteristic was formed into a quadrangular pyramid, and the trapezoid was formed by cutting off the bottom in parallel. The shock absorbing member 10 was made of a composition containing a liquid telekey polymer as a basic component, and was fixed to the upper plate 12 and the lower plate 9 with an adhesive.

Further, the shock absorbing member 11 having the linear spring characteristic has a height of 23 mm including the fixing jig 22,
The shock absorbing member 10 having a progressive spring characteristic is:
Four of them have a height of 25 mm.
The height difference between 0 and 11 was 2 mm.

The ceiling of the steel-framed house was suspended from the lower end flange of the I-shaped steel beam via the anti-vibration hanger, and two gypsum boards (12 mm thick) were screwed to the field edge by shifting the joints. And a 50 mm-thick rock wool was placed over the entire surface of the field edge.

The floor impact sound of this soundproof floor structure was measured. The floor impact sound was measured according to JIS-A-1418 for both heavy floor impact sound and lightweight floor impact sound. The results are shown in Table 2. Table 3 summarizes the main structural features of the soundproof floor structure of this example.

[0118]

[Table 2]

[0119]

[Table 3]

Example 2 A soundproof floor structure 34 as shown in FIG. 7 was manufactured. Example 1
Using the same shock absorbing material and ALC floor slab, lay a 15 mm thick particle board 24 in the direction perpendicular to the length direction of the ALC floor slab, and fix it to the ALC floor slab with screws of 90 mm length, The underfloor structure 25 was used. A black line is drawn at the seam position of the ALC floor slab of the particle board 24, and the distance between adjacent ALC floor slabs is 90 m from the lower plate 27 of the soundproof floor 26.
The bridge was fixed with a m-length screw. In the soundproof floor structure of this example, as shown in FIG.
Was placed.

As shown in plan and side views in FIGS. 9 and 10, the sound-insulating floor member 26 used in this example is basically the same as the sound-insulating floor member 7 of the first embodiment. However, soundproof flooring 2
The lower plate member 27 of No. 6 was a 350 mm square iron plate having a thickness of 3.2 mm. Further, a non-vulcanized butyl rubber sheet 29 having a thickness of 2 mm as a shock absorbing material was provided only on the lower surface of the lower plate member 27. As the upper plate material 30, 12 mm thick plywood was used as a 300 mm square. Between the upper plate 30 and the lower plate 27,
The same conical coil spring 11 as in the first embodiment is fixed to a fixing jig 22.
, And the lower plate 27 and the flexible epoxy adhesive 31.

At each of the four corners of the upper plate 30, there is disposed an impact buffer 32 in the form of a truncated cone with the bottom of the cone cut in parallel, and these impact buffers 32 are attached to the upper plate 30, the lower plate 27, and the lower plate 27. Adhered to. The shock-absorbing member 32 was manufactured using a liquid telekey polymer as a basic component.

The height of the shock absorbing member 11 having the linear spring characteristic is set to 24 mm including the thickness of the adhesive layer 31 and the fixing jig 22, and the impact buffering member 32 having the progressive spring characteristic is set to 25 mm. The difference between the heights of these different shock absorbing members 11 and 32 was 1 mm.

On the sound-insulating floor member 26 and the support member 28 having the arrangement shown in FIG.
A particle board having a thickness of 909 mm, a width of 1818 mm and a length of 1818 mm was laid, fixed to the upper plate 30 of the sound-insulating floor member 26 with wood screws, and the support member 28 was fixed by crimping.

An asphalt-type vibration damping material 19 having a thickness of 8 mm and a specific gravity of 2.5 was laid on the floor base material 5. In addition, on the sound insulating plate 19, in a direction perpendicular to the length direction of the floor base material 5, as a discarded adhesive material 20, a thickness of 9 mm × 909 mm width ×
An 1818 mm long particle board was laid. Further, as the floor finishing material 6, 12 mm thick × 303 mm wide ×
1818mm long flooring material with floor nail 3
At 3, it was driven into the floor base material 5, and was fixed by being driven into the floor upper structure 34.

The supporting material 28 of this example is obtained by heat-treating a mixture of polyester high-melting fiber and polyester low-melting fiber,
A highly resilient nonwoven fabric having a number of fusion bonding points between fibers was compressed by about 28 mm, and was arranged as a nonwoven fabric having a thickness of 70 mm with a width of 100 mm.

The floor impact sound of this example was measured in the same manner as in Example 1. Table 2 shows the results. Also,
Table 3 summarizes the main structural features of the soundproof floor structure of this example.

Example 3 A soundproof floor structure as shown in FIG. 11 was manufactured. The same ceiling conditions and steel frame structure as in Example 1 were used. The underfloor structure 3
A floor panel 35 as shown in FIG. 12 was used. This floor panel 35 has a cross section of 40 mm width × 90 mm height × 1820 m
A m-length joist tree 36 and a particle board 37 are bonded to each other with an adhesive layer 38. At both ends of the floor panel 35, an upper surface 35a of the joist tree and an end portion 35b of the particle board are provided, and at the upper surface 35a of the joist tree, the end portions of the particle boards of the other floor panels are overlapped and connected.

As shown in FIG. 13, a portion of the joist tree 36 which is in contact with the beam 2 at the lower end on both ends is provided with an 8 mm thick 40 mm square convex portion as shown in the plan view and the side view in FIGS. Surface uneven rubbers having different heights were provided as the shock absorbing material 39.

As shown in FIGS. 11 and 13, 12 mm thick × 40 mm long × 50 mm
A plywood 40 mm wide was fixed using a vinyl acetate adhesive and a wood screw in combination, and used as a fall prevention material.

The floor panel 35 is 15 mm thick × 910 mm
A particle board 27 having a width of 1820 mm and a length of 455 mm was fixed to a joist 36 at a pitch of 455 mm using a vinyl acetate adhesive layer 38 and a wood screw 52 as shown in FIG. The floor panel 35 was suspended between the steel beams 2.

The lower plate of the soundproofing floor was bridged between adjacent floor panels at a pitch of 455 mm in the short side direction of the panel and at a pitch of 600 mm in the long side direction, and fixed with wood screws.

As the soundproof flooring, the one shown in FIGS. 16 and 17 was used. The soundproof floor material 41 is formed by
A plywood having a thickness of 250 mm and a thickness of 250 mm, and a 1.5 mm-thick non-vulcanized butyl rubber sheet 43 as a shock absorbing material is provided on the lower surface thereof.
Was pasted. The upper plate 44 is made of a plywood having a thickness of 225 mm and a thickness of 225 mm and having a thickness of 12 mm.
A non-vulcanized butyl rubber sheet 43 having a thickness of mm was pasted.

Coil springs as impact buffering members 45 having linear spring characteristics were fixed at three places between the upper plate member 44 and the lower plate member 42 with claws 46. The fixing jig 47 and the lower plate 42 were fixed with wood screws 43.

In the vicinity of the four corners of the upper plate 44, an impact buffering member 48 having progressive spring characteristics and formed into a truncated pyramid using liquid telekey polymer as a basic component is disposed. Was fixed with an adhesive.

The height of the shock-absorbing member 45 having linear spring characteristics including the fixing jig was 23 mm, the height of the shock-absorbing member 48 having progressive spring characteristics was 25 mm, and the difference was 2 mm.

In the sound-insulating floor structure of this example, the sound-insulating floor members 41 and the support members 49 are arranged as shown in FIG. As shown in FIG. 11, the support material 49 has a plywood 50 having a thickness of 12 mm.
The nonwoven fabric 51 used in Example 2 was used for 30 m
, and compress it by about 23 mm to form a floor upper structure 4
And the underfloor structure 35.

An upper floor structure was provided on the soundproof floor member 41 and the support member 49. 20mm thickness x 90 as floor base material 5
A particle board having a width of 9 mm and a length of 1818 mm was laid in a direction orthogonal to the length direction of the floor panel 35, and was fixed to the upper plate 44 of the soundproof floor material 41 with wood screws.

On the floor base material 5, a specific gravity of 8 mm thickness
5 asphalt damping materials 19 were laid. in addition,
A particle board of 9 mm thickness x 909 mm width x 1818 mm length is laid as a pasting material 20 and further 12 m
A flooring material of m thickness × 303 mm width × 1818 length was laid as the floor finishing material 6. The floor finishing material 6 is fixed to the floor base material 5 with a floor nail 33, and the floor upper structure 4 is fixed.
Was completed, and the soundproof floor structure 52 was obtained.

The shock absorbing material 39 used in this example is:
As shown in FIGS. 17 and 19, a plurality of convex portions 54, 55, 56 having different diameters are formed on a base material 53, and the heights of the convex portions 54, 55, 56 are formed differently. I have.

The shock absorbing material 39 of this example was produced from the raw materials of Formulation Example 2 shown in Table 4.

[0142]

[Table 4]

The floor impact sound of this example was measured in the same manner as in Example 1. Table 2 shows the results.

Example 4 A soundproof floor structure shown in FIG. 19 was manufactured. In this example, the ceiling conditions and the steel frame structure were the same as in Example 1, and the floor panel was formed with the same joist and particle board as in Example 3.
The same shock absorbing material and fall prevention material as in Example 3 were used.

As shown in FIG. 20 and FIG.
Between the joists 59 on the lower surface of the particle board 58 of the same floor panel, two plasterboards 60 (12 mm thick)
Fixed with wooden screws 61 and L fittings 62 to form floor panel 63,
Both ends 63a and 63b of the floor panel 63 were connected and fixed to both ends of the other floor panel with wood screws to produce a lower floor structure.

In this example, the soundproof flooring material 64 shown in FIGS. 19 and 22 was used. As shown in FIGS. 19 and 23, the soundproof floor material 64 is placed on a floor panel 63 on the lower floor structure.
In both the short side direction and the long side direction, the cores are arranged at a pitch of 455 mm, and the seams 63 of the floor panels 63 adjacent to each other with the lower plate 65.
c was bridged and fixed with wooden screws.

The soundproof flooring 64 was a 12 mm thick plywood for both the upper plate 66 and the lower plate 65. Lower plate 65
Was a 300 mm square, and a 1.5 mm thick non-vulcanized butyl rubber sheet was provided as a shock absorbing material 67 on the lower surface thereof.
The upper plate 66 is 225 mm square, and on the upper surface thereof, 1.
An unvulcanized butyl rubber sheet having a thickness of 5 mm was provided as the shock absorbing material 68.

At the center between the upper plate member 66 and the lower plate member 65, a conical coil spring is provided as an impact buffering member 69 having a linear spring characteristic.
The fixing height was 23 mm including the fixing jig 71, and the lower plate 65 and the wood screw 72 were used for fixing.

In the vicinity of the four corners of the upper plate 66, a shock-absorbing member 73 having a truncated square pyramid-like liquid telekey polymer as a basic component was provided. This shock absorbing member 73 is 25 mm
Molded thick and has progressive spring characteristics. The shock absorbing member 73 is formed by bonding the upper plate 66 and the lower plate 6 with an adhesive.
5 was adhered.

The same support member 74 as used in Example 2
Were compressed and fixed between adjacent shock-absorbing members 73 having a progressive spring characteristic as a 50 mm thick × 40 mm wide × 60 mm long non-woven fabric to exhibit a constant load spring characteristic.

The upper floor structure 4 was formed on the soundproof floor material 64. 20mm thickness x 909mm width x 1 as floor base material
The particle board 5 having a length of 818 mm was laid, and was fixed to the upper plate 66 of the soundproof flooring 64 with wood screws. 4mm thick asphalt damping material 19 with specific gravity of 2.5
The particle board having a thickness of m × 909 mm × 1818 mm is discarded and laid as a sticking material 20 in a direction perpendicular to the length direction of the floor base material 5, 12 mm × 303 mm × 18.
A flooring material having a length of 18 was laid as a floor finish material 6. The floor finishing material 6 is obtained by converting the floor nail 33 to the floor base material 5.
, And fixed to form an upper floor structure, which is a soundproof floor structure 75 of this example.

With respect to this soundproof floor structure, the floor impact sound was measured in the same manner as in Example 1. Table 2 shows the results. Also,
Table 3 shows the main structural features of the soundproof floor structure of this example.
Summarized in

Comparative Example 1 A floor structure 81 shown in FIG. 24 was manufactured. An ALC floor slab 83 of 100 mm thickness × 606 mm width × 1810 mm length was directly suspended on an I-shaped steel beam 82 with the same ceiling conditions and the same steel structure as in Example 1. 15mm thickness x 909mm width x 181 in the direction orthogonal to the length direction of the ALC floor slab 83
The particle board 84 having a length of 8 mm was fixed to the ALC floor slab 83 with a screw 85 having a length of 90 mm.

8 mm on the particle board 84
Asphalt-based vibration damping material 86 with a specific gravity of 2.5 is laid,
9mm thickness x 909mm width x 18
A particle board 87 having a length of 18 mm was laid, and a flooring material 88 having a thickness of 12 mm × 303 mm width × 1818 length was further laid thereon. The flooring material 88 is
The floor nail 89 was driven into the particle board on the ALC floor slab 83 and fixed.

The floor structure of this example is the same as that of the first embodiment.
The floor impact sound was measured. Table 2 shows the results.

Comparative Example 2 A floor structure 91 shown in FIG. 25 was manufactured. In the same ceiling conditions and steel structure as in Example 1, a joist 92 (40 mm width × 90 m
m height x 1818 length) to 15 mm thickness x 909 mm width x
1818 mm long particle board 93 with 45 cores
A floor panel 95 was fabricated by fixing the wood screws 94 and a vinyl acetate adhesive at a pitch of 5 mm.

[0157] The floor panel 95 is suspended on the I-shaped steel beam 96, and the floor panels 95 are connected one after another to form a subfloor structure. A particle board 97 having a thickness of 15 mm is directly placed on the floor panel 95 in the length direction of the floor panel 95. Lay in the direction perpendicular to the direction
To the floor panel 95. Asphalt-based vibration damping material 99 having a specific gravity of 2.5 and a thickness of 8 mm was placed on the particle board 97.
Is laid, and 9 mm thick x 909 mm wide x 181
Lay the particle board 100 of 8 mm length,
The flooring material 101 having a thickness of 12 mm × a width of 303 mm × a length of 1818 was placed thereon.

The flooring material 101 was driven down to the particle board 97 on the floor panel 95 with the floor nail 102 and fixed, whereby the floor structure 91 was manufactured.

With respect to this floor structure, a floor impact sound was measured in the same manner as in Example 1. Table 2 shows the results.

Hereinafter, test results of Examples and Comparative Examples will be described. The first embodiment is an example in which the lower floor structure is an ALC floor slab, and a soundproofing floor material is provided between the lower floor structure and the upper floor structure.
Compared with Comparative Example 1 in which the ALC floor slab and the floor upper structure used in Example 1 were integrated, 63
Hz and 125Hz, which are difficult to improve, each 7d
B, 10 dB could be improved. In addition, each of the higher frequency bands can be improved by about 10 dB, and it can be felt that the performance is higher than the numerical value in the sense of hearing. From the above, L of heavy floor impact sound
_{The H} value is 55, and the determined frequency at that time is 63 Hz.
This is a very good result.

Next, looking at the lightweight floor impact sound, the L _L value is 4
6, the decision frequency at that time is 250 Hz. Comparative Example In L _L value 69, determined frequency at this time is 500 Hz. In both Example 1 and Comparative Example 1, the floor finishing material was general-purpose 1
A 2 mm thick flooring material is used, and a great effect is obtained in this respect as well.

In Example 2, a soundproof floor material was provided on an under-floor structure in which a particle board was screwed to an ALC floor slab.
In this example, an underfloor material, a damping material, a particle board, and a flooring material are fixed from above by a floor nail as an upper floor structure. L _H value of heavy floor impact sound is 53
The decision frequency at that time is 63 Hz. Very good results. The L _L value of the light floor impact sound is 44
The decision frequency at that time is 250 Hz. The floor finishing material is a general-purpose 12 mm thick flooring material as in Example 1, and a great improvement effect has been obtained.

In the third embodiment, a floor panel is made from a joist tree and a particle board, and a soundproof floor material is provided on the substructure below the floor, and a support material is provided between the periphery of the construction section and the soundproof floor material. This is an example in which a floor upper structure is provided.

The L _H value of the heavy floor impact sound is 58, and the determined frequency at that time is 63 Hz. This has been very successful in using light weight floor substructure floor panels. In Comparative Example 2, since the underfloor structure was a floor panel, the improvement from Comparative Example 2 was 63 Hz, 125 Hz.
It can be seen from the fact that the improvement is large by 10 dB and 4 dB respectively at Hz. In addition, lightweight floor impact sound is also L _L
The value is 57, which is at least one rank better than Comparative Example 2.

In Example 4, the gypsum board (1) was placed between the joists on the lower surface of the floor panel consisting of the joists and the particle board.
2 mm thick) on the underfloor structure
This is an example in which a shock absorbing member having two different spring characteristics is provided, and a floor upper structure is provided thereon.

The L _H value of the heavy floor impact sound is 57, and the determined frequency at that time is 63 Hz. This has been very successful in using floor panels, which are lightweight substructures. The improvement from Comparative Example 2 was also 63 Hz,
The improvement is large at 11 Hz and 11 dB at 125 Hz, respectively. The light floor impact sound also has an L _L value of 55, which is about two ranks better than Comparative Example 2.

As described above, the soundproof floor structure of the example was able to greatly reduce the heavy floor impact sound of the steel structure building as compared with the floor structure of the comparative example. In addition, such soundproof floor structure,
Not only the reduction in the low frequency range, but also in the entire frequency range was greatly reduced, resulting in a very good hearing.

[0168] On the other hand, the light floor impact sound is usually greatly affected by the floor surface finishing material. However, in the present invention, it was possible to improve the level to a level that does not require the use of a soundproof floor finishing material or a carpet. This is because the impact force on the floor is efficiently separated and dispersed by the upper floor structure and the soundproof floor material, and the reduced impact force is transmitted to the soundproof floor material and the lower floor structure, from which This is because radiation noise is reduced and vibration transmission to the steel beam is also reduced.

[0169]

According to the soundproof floor structure of the present invention, a plurality of soundproof floor members are provided between the upper floor structure and the lower floor structure so as to be separated from each other. Absorbing and relaxing the impact force of the above, and providing a plurality of shock absorbing members having different spring characteristics apart from each other between the upper plate and the lower plate to attenuate the vibration of the floor upper structure, and By using a flooring material with bending strength and thickness, by increasing the weight of the upper floor structure, the vibration of the lower floor structure can be suppressed, and the walking feeling on the upper floor structure can be significantly improved. At the same time, low-frequency noise generated from the underfloor structure can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a soundproof floor structure according to an example of the present invention.

FIG. 2 is a plan view of the soundproof floor structure of FIG.

FIG. 3 is a plan view of an example of a soundproof flooring material according to the present invention.

FIG. 4 is a side view of the soundproof flooring material of FIG.

FIG. 5 is a plan view of an example of the shock absorbing material according to the present invention.

FIG. 6A is a cross-sectional view of the shock absorbing material of FIG. 5 taken along line AA. (B) shows the shock absorbing material of FIG.
It is sectional drawing cut | disconnected by the -B line. (C) is sectional drawing which cut | disconnected the shock absorber of FIG. 5 by CC line.

FIG. 7 is a sectional view of a soundproof floor structure according to another example of the present invention.

8 is a plan view of the soundproof floor structure of FIG.

FIG. 9 is a plan view of another example of the soundproof flooring material according to the present invention.

FIG. 10 is a side view of the soundproof flooring material of FIG. 9;

FIG. 11 is a sectional view of still another example of the soundproof floor structure according to the present invention.

FIG. 12 is a cross-sectional view of an example floor panel according to the present invention.

FIG. 13 is a side view of a state where the floor panel of FIG. 12 is suspended on beams.

FIG. 14 is a plan view of another example of the shock absorbing material according to the present invention.

FIG. 15 is a side view of the shock absorbing material of FIG.

FIG. 16 is a plan view of still another example of the soundproof flooring material according to the present invention.

FIG. 17 is a side view of the soundproof flooring material of FIG.

FIG. 18 is a plan view of the soundproof floor structure of FIG.

FIG. 19 is a sectional view of still another example of the soundproof floor structure according to the present invention.

FIG. 20 is a cross-sectional view of another example of a floor panel according to the present invention.

FIG. 21 is a side view of a state where the floor panel of FIG. 20 is suspended on beams.

FIG. 22 is a plan view of still another example of the soundproof flooring material according to the present invention.

FIG. 23 is a plan view of the soundproof floor structure of FIG. 19;

FIG. 24 is a cross-sectional view of an example of a floor structure according to a comparative example.

FIG. 25 is a cross-sectional view of another example of the floor structure according to the comparative example.

[Explanation of symbols]

1,34,75 soundproof floor structure 2 steel beam 3,25 underfloor structure 3a underfloor structure piece 4,34 underfloor structure 5 floor base material 6 floor finish material 7,26,41,64 soundproof floor material 8 , 13 Space 9, 27, 42, 65 Lower plate 10, 11, 32, 45, 48, 69, 73 Shock absorbing member 12, 30, 44, 66 Upper plate 14, 18 Gap 15, 16, 67, 68 Shock absorption Material 17, 39 Shock absorbing material 17a, 53 Base material 17b, 17c, 54, 55, 56 Convex portion 19 Vibration damping material 20 Discarded attachment plate 21, 46 Claw 22, 47, 71 Fixing jig 23, 61, 98 Wood screw 24, 37, 58, 84, 87, 93, 97, 100
Particle board 28,49,74 Supporting material 29,43 Non-vulcanized butyl rubber sheet 31 Flexible epoxy adhesive 33,89,102 Floor nail 35,63,95 Floor panel 36,59,92 Joist 38 Adhesive layer 35a 35b Ends of particle board 40,50 Plywood 51 Non-woven fabric 52,72,94 Wood screws 60 Gypsum board 62 L fittings 63a, 63b Both ends of floor panel 63c Seam 70 Fixing 81,91 Floor structure 82,96 I-shaped steel beam 83 ALC floor slab 85 Screw 86,99 Asphalt damping material 88,101 Flooring material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Osamu Kiso 2-31-5 Makuyamadai, Fukuyama-shi, Hiroshima F-term (reference) 2E001 DF01 EA04 FA11 GA12 GA24 GA42 GA82 HA01 HA03 HB01 HB02 HB03 HB04 HB05 HC01 HC02 HC04 HD01 HD11 HD12 HE01 LA12

Claims (6)

[Claims] 1. An under-floor structure supported by the steel beam, an under-floor structure on the under-floor structure, and the under-floor structure includes a plate-like body. A soundproof floor structure for a steel-framed house, wherein the floor structure is formed from a floor panel or a floor slab having a joist, and the floor upper structure is formed from a floor base material and a floor finish material on the floor base material. A plurality of soundproofing floor materials are disposed between the underfloor structure and the upper floor structure, and when the soundproof floor structure is viewed in a longitudinal section, the soundproof flooring materials are separated from each other. A space is provided in the horizontal direction between the soundproofing floor materials, each of the soundproofing flooring materials includes a lower plate, a plurality of impact buffering members, and an upper plate, and the lower plate is the lower plate. The upper plate is fixed to the underfloor structure, and the upper plate member is fixed to the underfloor structure. Each of the shock absorbing members is disposed between the lower plate and the upper plate, the shock absorbing members are separated from each other, and a space is formed in a horizontal direction between the shock absorbing members. And each of the shock absorbing members has a spring characteristic, and the spring characteristic is selected from the group consisting of a linear spring characteristic, a progressive spring characteristic, and a constant load spring characteristic. The spring characteristic is different from the spring characteristic of the other shock absorbing member, and the floor base material has a bending strength of 13.0 N / mm ² or more and a thickness of 15 mm or more in a JIS-A-5908 test. It has, and wherein the weight of 1 m ² per the floor superstructure is 40～100Kg, sound-insulating floor structure. 2. The sound-insulating floor material includes at least two types of shock absorbing members, one of which is in contact with the upper plate, and the other of which is between the upper plate and the upper member. 2. The soundproof floor structure according to claim 1, further comprising a gap, wherein when the impact is applied to the floor upper structure, the other impact buffering member and the upper plate member come into contact with each other. 3. 3. A shock absorbing material is provided between at least one of the upper floor structure and the upper plate and between the lower plate and the lower floor structure. The soundproof floor structure according to any one of claims 1 to 3. 4. The underfloor structure is formed by horizontally joining a plurality of underfloor structures, and the lower plate member is provided on a seam of each of the underfloor structures. Characterized in that 25 to 90% of the length of the floor is covered with the lower plate. 5. A support member is provided between each of the soundproof floor materials and at least one location on the upper surface of a peripheral portion of the underfloor structure, and the support material supports the upper floor structure. The soundproof floor structure according to any one of claims 1 to 4, wherein the support member allows displacement of the floor upper structure when an impact is applied on the floor upper structure. . 6. Between the steel beam and the underfloor structure,
The shock absorbing material is interposed, the shock absorbing material includes a flat base material and a plurality of convex portions, and each of the convex portions is provided on at least one of a front surface and a back surface of the base material. And each of the protrusions is provided at a predetermined height from the front surface or the back surface, and on the front surface or the back surface, one of the protrusions having a relatively high height, and the one of the protrusions The difference between the height of the second protrusion and the height of the other protrusion is 5 to 50% of the height of the one protrusion, and the one protrusion is the lower floor structure or the lower floor. It is in contact with a steel beam, a gap is formed between the other convex portion and the underfloor structure or the steel beam, and each convex portion has polynorbornene rubber, a tackifying resin, The sound-insulating floor structure is formed from a raw material containing a softening agent, wherein the specific gravity of each of the protrusions is 1.3 to 1.8. When an impact is applied, the other convex portion is in contact with the underfloor area structure or the steel beam, the other convex portion, characterized in that the compressive deformation, claim 1
The sound-insulating floor structure according to any one of claims 5 to 10.