JP3184453B2 - Floor structure of flexible structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure of a flexible building. The invention is particularly suitable for floors of flexible buildings, such as wooden and steel prefabricated structures.

[0002]

2. Description of the Related Art Conventionally, on a floor having a rigid structure such as RC structure, as a countermeasure for reducing the floor impact sound, a method of increasing the floor slab thickness of the floor is generally used for heavy floor impact sound. Also,
Lightweight floor impact noise is solved by softening the floor finishing material. In a detached house or a low-rise apartment with a flexible structure, a lightweight floor impact sound is dealt with by softening a floor finishing material.

[0003]

However, in a building having a flexible structure, there is no measure against heavy floor impact noise. Alternatively, for example, a method has been proposed in which the second floor and the first floor living room immediately below have different structures. However, this is completely useless in terms of construction costs and the like, and is useless. For this reason, a practical countermeasure method for reducing the heavy floor impact noise in a flexible structure is desired.
In particular, since the low frequency region where the frequency band of the generated sound is 63 Hz or 125 Hz determines the level of the heavy floor impact sound,
is important. However, for these low frequency regions,
Because there is no countermeasure, engineers from various industries, including house makers, have been doing all kinds of studies over a long period of time, but have not been able to find a solution. On the contrary,
Sound in the region of 250 Hz or higher can be relatively easily reduced by sound insulation and sound absorption.

[0004] The object of the present invention is particularly to achieve a frequency of 63 Hz or 125 H
To reduce the level of heavy floor impact noise in the low frequency region, such as z. Another object of the present invention is to simultaneously secure the strength of the floor slab and other safety. Furthermore, the subject of the present invention is that it can withstand long-term use, is practical in terms of cost, workability at a building site,
An object of the present invention is to provide a floor slab structure that does not adversely affect the process.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a floor structure for reducing a heavy floor impact sound in a low frequency region of a frequency of 125 Hz or less in a floor structure of a flexible structure. A building or a steel prefabricated building, wherein the floor structure includes a plurality of floor supports made of steel or wood, and a plurality of floor slabs supported by the supports and forming the floor, and each floor slab is Each of the slabs is bridged between adjacent columns, and each slab is divided into a plurality of slab blocks laid on the same plane between the columns supporting the slab. The area of each slab block is 0.5 m ² or less, and at least a vibration insulating material is interposed between adjacent slab blocks in each slab.

The present inventor has set out the following in order to solve the above problems.
Repeated various trial and error. As a result, the present inventor has finally conceived of dividing the floor slab itself into small pieces into a plurality of blocks, and interposing at least a vibration insulating material between adjacent floor slab blocks. Invent this principle.

Conventionally, in a flexible floor slab structure, for example, a floor slab is provided between steel columns to form a floor, and mortar or the like is laid thereon to integrate the floor slab, thereby increasing the weight of the entire floor. It was common sense to reduce the vibration of the entire floor. This is an orthodox method based on the principle of vibration prevention, which promotes vibration damping due to an increase in weight. However, according to the study of the present inventors, such a method cannot attenuate low-frequency vibration.

On the other hand, the floor slab stretched between the columns is divided into a plurality of blocks, and the plurality of blocks are integrated to form a floor slab. The interposition of a material is fundamentally different from the conventional vibration preventing method. That is, by dividing the floor slab between the columns into a plurality of blocks, the dimensions of each floor slab block are significantly smaller than the dimensions of the original floor slab before the division. At the same time, a vibration insulating material was interposed between the adjacent slab blocks so that each slab block did not vibrate integrally with the adjacent slab block. As a result, it has been found that the sound frequency due to the vibration of the floor slab block moves remarkably to the high frequency side. Such vibration on the high frequency side can be easily cut off by a normal sound insulating material or sound absorbing material.

As described above, according to the present invention, a heavy-duty floor impact sound on the low frequency side, which has been long-awaited and has not been solved in a house having a flexible floor structure, has been solved for the first time.

By fixing these floor slab blocks on the same plane to form a floor slab, the required rigidity of the floor can be obtained, safety can be ensured, and durability is sufficient. It was confirmed that it was sufficiently practical in terms of cost. In addition, there is an advantage that the workability at the site is good and the process can be shifted to the next step without drying because of the dry method. In a conventional ALC or the like, a process wait by the wet method has occurred, but such a process wait is unnecessary.

Next, the components of the present invention will be sequentially described, and the operation of the present invention will be described in detail. The floor slab block referred to in the present invention includes inorganic materials such as concrete, mortar, gypsum, and hollow extruded products such as ALC; wood materials such as wood, laminated wood, and plywood; metal mold steel; rubber: plastic FRP; Wool cement; rubber; plastic; compression molded powder or granules such as foamed sand together with a binder; This block bears a load, and it is necessary for the floor slab block to vibrate independently of other floor slab blocks at the time of excitation.

When viewed in the plane direction of the floor, the length of each of the vertical and horizontal sides of each floor slab block is preferably 1.0 m or less, and the sum of the vertical and horizontal dimensions is 1 m. .5m
Or less, and the area is 0.5 m ² or less. As a result, the frequency of the generated sound can be further shifted to the higher frequency side, and low-frequency sound having a frequency of 125 Hz or less is less likely to be generated. However, if the planar dimensions of each floor slab block are too small, the cost required for fixing each floor slab block and the cost of supporting frames increase, so from this viewpoint, the vertical dimensions and horizontal width of the floor slab block are considered. Each of the dimensions is preferably at least 0.1 m, the sum of the vertical and horizontal dimensions is preferably at least 0.3 m, and the area is preferably at least 0.02 mm ² .

It is advantageous to reduce the thickness of the floor slab block as much as possible in terms of workability, weight and effective space. Therefore, it is preferably 150 mm or less, and more preferably 100 mm or less. The shape of each floor block is not particularly limited. Further, the floor slab block may be solid and may have a void. This gap may be provided inside the floor slab block, or may be provided below the floor slab block.

[0014] In addition, by providing the lower surface of the floor slab block with flesh, the rigidity of the entire floor slab is increased, and a structure in which rotation deformation due to vibration is difficult to occur is obtained. Further, the dimensions and materials of the floor blocks in one floor slab need not be the same dimensions or the same material. By using different combinations of different dimensions and materials, it is possible to obtain an advantageous combination in controlling the generated frequency. Therefore, a desired floor slab can be obtained by controlling the generated frequency, rigidity, weight, and design thickness of the floor slab.

In the present invention, a support frame for supporting the bottom surface of the floor slab block is attached to the column, and the support frame provides
Each slab block can be supported. At this time, by forming the position restricting portion for positioning the side surface of the floor slab block on the support frame, each floor slab block can be easily positioned simply by being installed inside the position restricting portion. , Construction becomes easy. Also, put concrete or mortar inside this position regulation part,
By curing, a floor slab block can be formed. It is preferable that the position restricting portions are provided on the entire circumference of each floor slab block, since the installation of the floor slab blocks is particularly easy.

In this embodiment, the transmission of vibration between the support frame and the floor slab block is suppressed by interposing a vibration insulating material between the support frame and the bottom and side surfaces of the floor slab. More preferably,

The support frame and the position restricting portion are made of metal, wood, plastic, reinforced inorganic material or the like, and fix and support each floor block at a predetermined position. It is preferable that each member constituting the support frame is fixed to each other by bolting, nailing, tenon, welding, or the like. By installing each slab block in this support frame, the slab is formed and the rigidity and safety of the slab are ensured.

In another embodiment of the present invention, each of the floor slab blocks is supported by a support plate, and a vibration insulating material is interposed between the floor slab block and the support plate. The material of such a support plate may be metal, inorganic, or wood, and the shape of the support plate may be a flat plate, a wavy shape, a deck plate, or a keystone plate shape. If necessary, each support plate can be held by a support frame. In this case, by reducing the size of each support plate, the generated frequency can be easily reduced to a low frequency and shifted to a high frequency side.

When each floor slab block is supported by a support plate, a support column for supporting the support plate is further attached to the column, and a space between the support column and each floor slab block is provided. A vibration insulating material can be interposed.

When each of the floor slab blocks is supported by a support plate, an inorganic material such as raw mortar or ready-mixed concrete is poured into each of the support plates, and the inorganic material is hardened, whereby the floor slab blocks are hardened. Can be formed. That is, each support plate can be used as a mold. In this case, by arranging the reinforcing bars so as to penetrate the adjacent slab blocks, the resistance of the slab to the compressive stress is further improved.

Further, by interposing a viscoelastic body between the support plate and the floor slab, an effect as a restrained vibration damping slab is exhibited, and each floor slab works as a resistance component against compression load. In particular, attach the support plate to the upper surface of the support column, attach the support plate to the lower surface of the support column,
A hollow portion is formed by the support pillar and the pair of support plates, each floor slab block is accommodated in the hollow portion, and a vibration insulating material is interposed between the floor slab block and each support plate. And a vibration insulating material can be interposed between them. Thereby, the rigidity is further improved, and a floor slab excellent in vibration damping effect can be obtained. This will be further described later with reference to FIG.

In this case, by using a liquid rubber or urethane which forms a crosslinked viscoelastic material by curing at normal temperature as a vibration insulating material, excellent vibration damping performance can be imparted.
An effect as an adhesive can also be provided. Therefore, the step of fixing the support plate as a floor slab can be omitted.

The vibration insulating material is preferably at least one material selected from the group consisting of rubber, plastic, fiber, foam and paper. This vibration insulating material allows direct contact between each adjacent slab block, between the slab block and the support frame, between the slab block and the support plate, and between the slab block and the position regulating portion. It is possible to prevent chattering and rattling noise from occurring, and to make each member vibrate independently.

FIGS. 1 to 6 are schematic plan views each illustrating a pattern of the floor slab structure of the present invention. However, in FIGS. 1 to 6, details such as a support frame and a support plate are not shown, and one floor slab between a pair of columns is shown. In the floor slab structure of FIG. 1, each floor slab block 1A is a substantially square with the same area,
Each floor slab structural block 1A is arranged in a grid pattern. In the floor slab structure of FIG. 2, a floor slab block 1A,
A floor slab is configured by combining a rectangular floor slab block 1B having a length and area twice as large as the block 1A and a rectangular floor slab block 1C having a length and area three times as large as the block 1A.

In the floor slab structure shown in FIG. 3, the floor slab block 1A having a substantially square shape and the floor slab block 1D in which three blocks 1A each having the shape of a "K" are integrated in a ratio of 1: 1.
Are combined to form a floor slab. In the floor slab structure of FIG. 4, a rectangle is formed by combining two right-angled triangle slab blocks 1E, and two isosceles triangle floor slab blocks 1F and two isosceles triangle floors are provided. A rectangle is also formed by combining the plate blocks 1G. In the slab structure of FIG. 5, one slab is constituted by combining three rectangular slab blocks 1H. In the floor slab structure of FIG. 6, a rectangular floor slab is formed as a whole by combining rectangular floor slab blocks 1I in 3 rows × 4 rows.

Next, FIGS. 7 to 13 are sectional views each showing a part of the floor slab structure of the present invention. In the floor slab structure of FIG. 7, the outer support frames 2 are installed on columns (not shown), and a plurality of rows of inner support frames 4 are provided between the plurality of outer support frames 2. Each support frame is supported by a support (not shown). The outer support frame 2 includes a support portion 2b and a position regulating portion 2a extending substantially perpendicular to the support portion 2b. The inner support frame 4 includes a pair of support portions 4a and a position regulating portion 4b extending substantially perpendicular to the support portions 4a.

The bottom surface of each floor slab block 1 is placed on each of the support portions 2b and 4a, and the side surfaces of each floor slab block 1 are regulated by position regulating portions 2a and 4b, respectively. The vibration insulating material 3A is interposed between the support section 2b and the position regulating section 2a and the floor slab block 1, and they are not in direct contact with each other. Also, the support portion 4a
In addition, the vibration insulating material 3B is interposed between the position regulating portion 4b and the floor slab block 1, and they are not in direct contact with each other.

In the floor slab structure shown in FIG.
A includes a support portion 2b, a position regulating portion 2a extending substantially perpendicular to the support portion 2b, and a fixed portion 2c extending horizontally from the upper end thereof. The inner support frame 4A includes a pair of support portions 4a and a position regulating portion 4b extending substantially perpendicular to the support portions 4a. On each support 2b and 4
a, the bottom surface of each floor slab block 1 is placed, and the side surface of each floor slab block 1
a and 4b. The upper surface of the floor slab 1 is held from above by the fixing portion 2c. Fixed part 2
c, the support portion 2b, the position regulating portion 2a, and the floor slab block 1.
The vibration insulating material 3C is interposed between the floor slab 1 and the supporting portion 4a and the position regulating portion 4b.

In the floor slab structure shown in FIG.
The configuration of the inner support frame 4 is the same as that shown in FIG. However, in this floor slab structure, the outer support frame 2
Is larger than the vertical dimension of the inner support frame 4. Inside the floor slab portion 6, for example, three void portions 6a are provided.

In the floor slab structure of FIG. 10, the outer support frame 2A and the inner support frame 4 are the same as those shown in FIG. However, each floor slab block 7 includes a rectangular parallelepiped main body 7a extending in the horizontal direction, and a thick portion 7b extending downward from both ends of the main body 7a.
A gap 8 is formed on the lower side and inside the thick portion 7b.

In the floor slab structure of FIG. 11, the outer support frame 2A is the same as that shown in FIG. A support plate 10 such as a deck plate is fixed inside the support portion 2b of the outer support frame 2, and a floor slab block 11 is fixed above the support plate 10. Such a slab block is made of a hardened material such as ready-mixed concrete. Each block 11 has a rectangular parallelepiped main body 1 extending in the horizontal direction.
1a and a thick portion 11b extending downward from both ends of the main body 11a, and a gap 8 is formed below the main body 11a and inside the thick portion 11b.

In this embodiment, for example, three such thick portions 11b and voids 8 are provided. A vibration insulating material 12 is interposed between adjacent blocks 11. In the case where each block 11 is formed by placing and hardening of ready-mixed concrete or the like as in the present embodiment, reinforcement can be applied to the floor block 11 adjacent to the vibration insulating material 12 therebetween. Thus, the strength of the floor slab against the compressive load is further improved.

In the floor slab structure shown in FIG. 12, a supporting plate 16 and a supporting column 15
Are attached by nails 17. On the support plate 16, the floor slab block 1 is installed between the support columns 14 and 15. This support column 15 also functions as a frame material for positioning each block 1 at a predetermined position. A vibration insulating material 18B is interposed between the support columns 14, 15 and the side surface of the block 1, and a vibration insulating material 18A is interposed between the support plate 16 and the bottom surface of the block 1.

In the floor slab structure shown in FIG. 13, the upper support plate 19A is supported by the support columns 14 and 15 on the support columns.
And the lower support plate 19B are attached by nails 17, respectively. As a result, a cavity 20 is formed between the upper support plate 19A, the lower support plate 19B, and the support columns 14 and 15, and the floor block 22 is installed in the cavity 20. Between the side surface of the block 22 and the support columns 14 and 15, the block 22 and the support plate 19A,
19B, the vibration insulating material 23 is interposed. That is, the vibration insulating material 23 is
Is covered all around.

Spacers 21 are provided between the block 22 and the upper support plate and between the block 22 and the lower support plate, respectively.
Are held therebetween, so that the distance between each support plate and the block is kept constant. According to the floor slab structure in which the floor slab block 22 is built in the cavity as described above, when a load is applied from the floor surface, the impact due to the load is absorbed by the vibration insulating material 23 before being applied to the floor slab 22. You. In addition, the operation of the floor slab at this time is an operation most suitable for attenuating the vibration. That is, assuming that a load is applied to the leftmost block 22 in FIG. 13, the upper support plate 19A moves downward. As a result, the vibration is absorbed by the block 22 and the two layers of the vibration insulating material 23, and the lower support plate 19B moves slightly downward. In this process, each floor slab 22
Contribute to vibration absorption.

[0036]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. Each floor slab structure was created as follows. (Example 1) (1) Floor slab size: 100 mm thickness x 900 width x 1800
Arrange 3 slabs of mm length, 1800mm width x 2700
A mm long floor was created. (2) As shown in FIG. 1, 18 blocks each having a size of about 300 mm × 300 mm were arranged to form one floor slab. (3) The material of the floor slab was used by cutting ALC for floor slab. (4) A floor slab structure as shown in FIG. 7 was employed. Thickness 2.
The support frame was made of a 3 mm iron material. (5) As a vibration insulating material, an unvulcanized butyl rubber sheet having a thickness of 2 mm was interposed at a portion where the floor slab block and the frame material were in contact with each other.

Example 2 (1) Floor slab size: 100 mm thickness × 900 width × 1800
Arrange 3 slabs of mm length, 1800mm width x 2700
A mm long floor was created. (2) As shown in FIG. 1, 18 blocks each having a size of about 300 mm × 300 mm were arranged to form one floor slab. (3) The material of the block is ALC for floor slab and rubber powder are compression molded with urethane binder, and the upper and lower sides are 12 mm.
Sandwiching was performed with a pressing plate to prepare a floor slab block having a thickness of 100 mm. Three sandwich floor slab blocks were arranged in one row. At the same time, three slab blocks made of ALC were arranged. By arranging the rows of the sandwich floor slab blocks and the rows of the ALC blocks alternately and providing a total of six rows, a three-row × six-row planar arrangement shown in FIG. 1 was formed. (4) A floor slab structure as shown in FIG. 7 was employed. Thickness 2.
The support frame was made of a 3 mm iron material. (5) A felt having a thickness of 5 mm was interposed between the floor block and the support frame as a vibration insulating material.

Example 3 (1) The size of the floor slab is 100 mm thick × 900 width × 180
Arrange 3 floor slabs of 0mm length, 1800mm width x 270
A 0 mm long floor was created. (2) The plan layout of the floor slab blocks was as shown in FIG. Two blocks 1C of about 300 mm x 900 mm,
Four 300 × 600 mm blocks 1B, 300 mm
One floor slab was constructed by combining four × 1 mm blocks 1A. (3) As the slab block, ALC for slab was cut and used. (4) A floor slab structure as shown in FIG. 7 was employed. Thickness 2.
The support frame was made of a 3 mm iron material. (5) As a vibration insulating material, an EPT sponge having a thickness of 3 mm was interposed between the floor block and the support frame.

Example 4 (1) Floor slab size is 100 mm thickness × 900 width × 180
Arrange 3 floor slabs of 0mm length, 1800mm width x 270
A 0 mm long floor was formed. (2) The plan layout of the floor slab blocks was as shown in FIG. Eight square-shaped floor slab blocks 1D with dimensions of about 450 mm in length x 450 mm in width, with one corner of a quadrilateral cut out to about 300 mm square, and about 300 mm x 300 mm
And eight square floor slab blocks 1A. (3) The floor slab block was 100 mm thick concrete. (4) The floor slab structure shown in FIG. 8 was adopted. 2.3m thick
The supporting frames 2A, 4A were made of m iron material. Attach a mold to the lower surface of the support frame, form a molding space to form a block, cast concrete in this molding space,
The concrete was cured and then the formwork on the underside of the support frame was removed. (5) As a vibration insulating material, a 2 mm-thick recycled butyl rubber “Span Seal” having an adhesive property to ready-mixed concrete before casting concrete at a portion where the support frame and the concrete block are in contact with each other (manufactured by Hayakawa Rubber Co., Ltd.) Was stuck.

Example 5 (1) The size of the floor slab is 100 mm thick × 900 width × 180
Arrange 3 floor slabs of 0mm length, 1800mm width x 270
A 0 mm long floor was formed. (2) The plane arrangement of the floor slab blocks was as shown in FIG. Approximately 600mm base x 900mm height and four triangular floor slab blocks 1E, about 600mm base x 450mm
Approximately 900 m with two triangular floor slab blocks 1F
m base x about 300mm height triangular floor slab block 1G
Was combined with two. (3) The floor slab block was formed of concrete having a thickness of 100 mm. (4) The floor slab structure shown in FIG. 8 was adopted. 2.3mm thick
A support frame was formed from the iron material of No. 1, and ready-mixed concrete was poured into each molding space partitioned by the support frame to form each floor slab block. (5) As a vibration insulating material, a 2 mm-thick recycled butyl rubber sheet having an adhesive property to ready-mixed concrete was attached to a portion of the support frame in contact with the concrete block before casting concrete.

Example 6 (1) The size of the floor slab is 60 mm thick × 900 width × 18
Arrange three 00mm length slabs, 1800mm width x 27
A 00 mm long floor was formed. (2) The plane arrangement of the blocks was the same as that of the third embodiment. (3) As the slab block, a hollow extruded cement slab having a thickness of 60 mm was cut, and a slab block 6 shown in FIG. 9 was prepared and used. (4) The floor slab structure shown in FIG. 9 was adopted. 2.3mm thick
The support frame was formed by the iron material of the above. The hollow extruded cement slab block 6 was set in the space partitioned by the support frame. (5) As the vibration insulating material, a felt having a thickness of 5 mm was interposed between the floor block and the support frame.

Example 7 (1) The size of the floor slab was 100 mm thick × 900 width ×
Arrange three 1800mm length floor slabs, 1800mm width x
A 2700 mm long floor was formed. (2) The plan layout of the floor slab blocks was as shown in FIG. A floor slab block 1C of about 300 mm × 900 mm,
300 mm x 600 mm block 1B and 300 mm
A shape combining the block 1A of × 300 mm was used. (3) As the slab block, one having the form shown in FIG. 10 was used. A thick portion 7b having a thickness of 100 mm was provided around the block 7. This thick portion 7b corresponds to a small beam in the floor slab. About 250mm at the center of the block
The corner portion has a thickness of 50 mm.

(4) The floor slab structure shown in FIG. 10 was employed.
The support frame was formed of an iron material having a thickness of 2.3 mm. A formwork is attached to this support frame, and about 250 mm × 2
Styrofoam of 50 mm × 50 mm was attached, and concrete was cast thereon. After concrete hardening,
The mold and styrofoam were removed to form a box-shaped block 7 having a concave center. (5) As a vibration insulating material, a reclaimed butyl rubber viscoelastic sheet having a thickness of 2 mm and having adhesiveness to ready-mixed concrete was interposed between the floor slab block and the support frame.

Example 8 (1) The size of the floor slab is 100 mm thick × 900 width ×
Arrange three 1800mm length floor slabs, 1800mm width x
A 2700 mm long floor was formed. (2) The plan layout of the floor slab blocks was as shown in FIG. Approximately 600 mm x 900 mm floor slab structural block 1H
Were arranged to form one floor slab. (3) Concrete blocks were used as floor slab blocks. (4) The floor slab structure shown in FIG. 11 was adopted. 2.3m thick
The supporting frame 2A was formed of m iron material. The deck plate 10 is set while being partitioned by the support frame 2A,
The ready-mixed concrete was poured onto the deck plate 10 and was hardened. (5) As a vibration insulating material, a vulcanized rubber having a thickness of 10 mm was set at the butted portion of the deck plate to perform vibration insulation between the blocks.

(Example 9) (1) The size of the floor slab was 64 mm thick x 900 width x 1
3 800mm long floor slabs are arranged, 1800mm width x 2
A 700 mm long floor was formed. (2) The plane arrangement of the floor slab blocks was as shown in FIG. Approximately 450mm x 300mm floor slab block 1I
Two sheets were arranged to form one floor slab. (3) A mortar plate having a thickness of 50 mm was used as the floor slab block.

(4) A floor slab structure as shown in FIG. 12 was employed. Plywood (a kind of support plate) 16 having a thickness of 12 mm x 450 mm width x 900 mm, and a cross-sectional dimension of 50 mm x 50
The wooden slab structure shown in FIG. 12 was formed by using mm wood (a type of support pillar) 14 and 15. (5) As a vibration insulating material, a 2 mm-thick butyl rubber unvulcanized sheet was stuck over the entire upper surface of the support plate 16 to provide vibration insulation between the bottom surface of the floor slab block and the support plate 16. . An EPT sponge having a thickness of 3 mm was interposed between the woods 14 and 15 and the floor slab.

Example 10 (1) The size of the floor slab is 80 mm thick × 900 width × 1
3 800mm long floor slabs are arranged, 1800mm width x 2
A 700 mm long floor was formed. (2) The plane arrangement of the floor slab blocks was as shown in FIG. One slab was constituted by 12 slab blocks of about 450 mm × 300 mm. (3) A mortar plate having a thickness of 50 mm was used as the floor block.

(4) The floor slab structure shown in FIG. 13 was employed.
Wood 14, 1 whose cross-sectional dimensions are 50 mm x 56 mm
5 formed a support frame. A lower support plate (plywood) 19B having a thickness of 12 mm was fixed with a wood screw 21. Room temperature curable liquid polybutadiene rubber was injected into the installation portion of the floor slab block so as to have a thickness of about 3 mm. Diameter 3
A small amount of a vulcanized rubber spacer 21 having a diameter of 30 mm and a length of 30 mm was sprayed, and a floor block 22 was accommodated thereon. Room temperature curable liquid polybutadiene rubber is again injected onto the block 22, a small amount of a vulcanized rubber spacer having a diameter of 3 mm and a length of 30 mm is sprayed thereon, and the upper support plate 19A is placed thereon.
(Plywood having a thickness of 12 mm) were stacked, and fixed to a support column with a wood screw 17.

Example 11 (1) The size of the floor slab was 80 mm thick × 900 width × 1
3 800mm long floor slabs are arranged, 1800mm width x 2
A 700 mm long floor was formed. (2) The plane arrangement of the floor slab blocks was as shown in FIG. One slab was constituted by 12 slab blocks of about 450 mm × 300 mm. (3) A mortar plate having a thickness of 50 mm was used as the floor block.

(4) A floor slab structure as shown in FIG. 13 was employed. Wood having a cross-sectional dimension of 50 mm × 56 mm was used as the support columns 14 and 15. Lower support plate 19B (thickness 12m
m plywood) was fixed to the support columns 14 and 15 with wood screws. Room temperature foam-curable liquid polybutadiene rubber is poured into the set portion of the floor slab block so as to have a thickness of about 3 mm, and a small amount of a vulcanized rubber spacer 21 having a diameter of 3 mm and a length of 30 mm is sprayed on the floor slab. I put a block. A small amount of room temperature foaming-curable liquid polybutadiene rubber was applied again on this floor slab block, and a diameter of
Spread a vulcanized rubber spacer of mmφ × 30mm length,
An upper support plate 19A (plywood having a thickness of 12 mm) was fixed thereon with wood screws, and the periphery of the floor block was fixed with a foam.

(Comparative Example 1) The floor slab size was 100
4 mm slabs of thickness x 600 width x 1800 mm length,
One floor slab having a thickness of 100 mm, a width of 300 mm and a length of 1800 mm was arranged, and a mortar having a thickness of 20 mm was laid thereon to form a floor having a width of 1800 mm and a length of 2700 mm. ALC for floor slab was used as the floor slab.

(Test method) The weight floor impact sound was measured according to JIS-A
-1418 ". The improvement amount of the heavy floor impact sound of each example with respect to the heavy floor impact sound in Comparative Example 1 is
The results are shown in Tables 1 and 2 for each frequency. FIG. 14 is a schematic diagram showing an outline of this test. FIG. 15 shows a hit point, and FIG. 16 shows a sound receiving point.

In FIG. 14, the bang machine 24 was installed on the floor slab structure 25, and a hit was applied at the position shown in FIG. 26 is a microphone, 27 is a precision sound level meter, 2
8 is a frequency analyzer. The microphone installation position is shown in FIG.
It was shown to. Tables 1 and 2 show the test results.

[0054]

[Table 1]

[0055]

[Table 2]

Hereinafter, the effects of the present invention will be described based on the results of Examples and Comparative Examples. The first embodiment is an example in which the floor slab is divided into 18 blocks for the time being. The heavy floor impact sound at 63 Hz and 125 Hz can be greatly reduced as compared with Comparative Example 1. Since the high frequency side is an area that can be improved by using the ceiling or the sound absorbing layer together, it can be seen that the floor impact sound level can be improved by two ranks. There is no particular problem in terms of cost and safety,
There is practicality.

In the second embodiment, the floor slab was replaced with the same 18 slab as the first embodiment.
Divide into blocks, and use ALC for each of the three short sides of the floor slab
This is an example in which blocks and sandwich blocks are used alternately. The heavy floor impact sounds at 63 Hz and 125 Hz can be reduced by 14 dB and 13 dB, respectively, as compared with Comparative Example 1.
This means that the floor impact sound level can be improved by two or three ranks, and the practicability is also sufficient.

Embodiment 3 is an example in which a floor slab is divided into ten pieces by ALC blocks having different dimensions. This is also 63H
10 dB and 9 dB are improved at z and 125 Hz, respectively, and the floor impact sound level can be reduced by two ranks. Moreover, the practicality is also sufficient.

Embodiment 4 is an example in which the floor slab is divided as shown in FIG. 4, and the material of the floor slab is concrete. The improvements at 63 Hz and 125 Hz are also 11 dB and 12 dB, respectively, and the floor impact sound level can be reduced by two ranks. There is enough practicality.

Embodiment 5 is an example in which a floor slab is divided into eight by a combination of triangles. The block material is concrete.
The improvement at 63 Hz and 125 Hz is 13 dB, respectively.
It has a great effect. It can be seen that the floor impact sound level can be improved by 2 to 3 ranks. There is no practical problem.

The sixth embodiment is similar to the third embodiment,
This is an example in which blocks of different dimensions are combined and the block material is a hollow extruded cement plate. Although 1 kHz or more is worse than the comparative example, the low frequency range of 63 Hz and 125 Hz is very effective, and each improvement amount is 13 dB.
This indicates that the floor impact sound level can be reduced by two to three ranks. Also, since it is hollow and thin, it is suitable for weight reduction. Moreover, the practicality is sufficient.

The seventh embodiment has a structure in which blocks of different dimensions are combined, and the material of the blocks is thinner at the center and thicker at the periphery. At 1 kHz or more, although worse than the comparative example, at 63 Hz and 125 Hz, which are problematic, they are very effective, and the improvement amounts are 15 dB and 14 dB, respectively. It can be seen that the floor impact sound level can be improved by three ranks. Moreover, the practicality is also sufficient.

Embodiment 8 is an example in which a floor slab is divided into three parts and one side is provided with concrete on a deck plate. A thick portion of the deck plate is formed on the long side of the divided portion, which functions as a small beam and is effective in increasing rigidity. The improvement amount at 63 Hz and 125 Hz is 8 dB, respectively.
9 dB, which is also a high reduction effect, and shows that the floor impact sound level can be improved by two ranks. There is enough practicality.

The ninth embodiment is an example in which one side is used as a plate, and a wooden timber is fixed to the plate as a partition. In this example, a mortar plate having a thickness of 50 mm is provided as a block material.
The plate is an example in which one dimension is 450 mm × 900 mm. The improvement amount of 63Hz and 125Hz is 9d each
B, 10 dB, indicating that the floor impact sound level can be improved by two ranks. There is no practical problem.

The tenth embodiment is an example in which the divided blocks are sandwiched between both sides as plate materials. In this example, the block, the partition member, and the plate member are each connected to vibration insulation with a room temperature reaction-curable liquid polybutadiene rubber to form a vibration damping structure. 15d improvement at 63Hz and 125Hz
B, 14 dB, indicating that only three ranks can be improved in floor impact sound level. Also, there is no practical problem.

The eleventh embodiment is an example in which a divided block is sandwiched between both sides by plate materials. The block, the partition member, and the plate member are each formed of a room-temperature reaction-curable liquid polybutadiene rubber, and are of a type that forms a foam after being cured. As in the tenth embodiment, this is an example in which a vibration damping structure is formed by hardening of vibration insulation and adhesion. 63Hz, 125H
The improvement amount in z is 14 dB and 15 dB, respectively, and it can be seen that the floor impact sound level can be improved by four ranks. Also, there is no practical problem.

[0067]

As described above, according to the present invention, 63H, which is the largest controlling factor of the impact sound level of the heavy floor impact sound, is obtained.
The present invention has been proved to be extremely effective in controlling the amount of sound generated at z, 125 Hz. Moreover, the present invention
It is clear that the cost floor does not cause any increase, and the heavy floor impact noise can be reduced at low cost.

Further, by developing the above idea, the radiated sound of low-frequency sound can be controlled by reducing the vibrating object into small blocks.
Such a concept has not been used so far, has a great industrial value, and is the first solution to a long-awaited problem.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a planar arrangement of floor slab blocks in a floor slab structure according to an embodiment of the present invention.

FIG. 2 is a plan view illustrating an example of a planar arrangement of floor slab blocks in the floor slab structure according to the embodiment of the present invention.

FIG. 3 is a plan view showing an example of a planar arrangement of floor slab blocks in the floor slab structure according to the embodiment of the present invention.

FIG. 4 is a plan view showing an example of a planar arrangement of floor slab blocks in the floor slab structure according to the embodiment of the present invention.

FIG. 5 is a plan view showing an example of a planar arrangement of floor slab blocks in the floor slab structure according to the embodiment of the present invention.

FIG. 6 is a plan view showing an example of a planar arrangement of floor slab blocks in the floor slab structure according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a main part of a floor slab structure according to an example of the present invention.

FIG. 13 is a cross-sectional view showing a main part of the floor slab structure according to the embodiment of the present invention.

FIG. 14 is a schematic diagram showing an outline of an impact sound test facility.

FIG. 15 is a plan view showing impact points on the floor.

FIG. 16 is a plan view showing a sound receiving point of the sound receiving room.

[Explanation of symbols]

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1
H, 1I, 6, 7, 11, 22 Slab block 2, 2A Outer support frame 4 Inner support frame 2b, 4a Support section 2a, 4b Position control section 2c Fixed section 3A, 3B, 3C, 12, 18A, 18B, Reference Signs List 23 Vibration insulating material 4a Support part 6a, 8 Void part 7b, 11b Thick part 10 Support plate 14, 15 Support column 16, 19A, 19B Support plate 20 Cavity 21 Spacer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-144057 (JP, A) JP-A-5-207569 (JP, A) JP-A-8-135143 (JP, A) 38308 (JP, U) Fully open sho 60-91713 (JP, U) Fully open sho 56-71818 (JP, U) Fully open sho 55-123525 (JP, U) Really open flat 4-94007 (JP, U) Shokai 62-63340 (JP, U) Shokai 5-84711 (JP, U) Shokai 2-121515 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) E04B 5/43 E04B 1/98

Claims (11)

(57) [Claims] In the floor structure of a flexible structure, a frequency 1
Reduces heavy floor impact noise in low frequency range below 25Hz
Floor structure, wherein the flexible structure is a wooden building or a steel prefabricated building.
The floor structure is made of steel or wood.
A plurality of struts, and supported by the struts, forming a floor
A plurality of floor slabs, each floor slab is bridged between the adjacent columns , and each of the floor slabs
Deck is divided into a plurality of deck blocks are laid on the same plane between the supports for the floor slab
And the area of each floor slab block is 0.5 m ² or less.
A floor structure , wherein at least a vibration insulating material is interposed between adjacent floor blocks in each floor slab . 2. The floor frame according to claim 1, wherein a support frame for supporting a bottom surface of the floor slab block is attached to the column, and each of the floor slab blocks is supported by the support frame. Floor structure . 3. The floor structure according to claim 2, wherein a position regulating portion for positioning a side surface of the floor slab block is formed on the support frame. 4. The floor structure according to claim 3, wherein the vibration insulating material is interposed between the support frame and the bottom and side surfaces of the floor slab . 5. The floor slab block is supported by a support plate, and the vibration insulating material is interposed between the floor slab block and the support plate. Or the floor structure of 2. 6. A support column for supporting the support plate is attached to the column, and the vibration insulating material is interposed between the support column and each of the floor slab blocks. The floor structure according to claim 5, wherein: 7. The support plate is attached to an upper surface of the support column, and the support plate is attached to a lower surface of the support column. A cavity is formed, each of the floor slab blocks is housed in the cavity, and the vibration insulating material is interposed between the floor slab block and each of the support plates, and The floor structure according to claim 6, wherein the vibration insulating material is interposed between the floor slab and the support column. 8. The method according to claim 1, wherein spacer particles are interposed between the floor slab block and each of the support plates.
The floor structure according to claim 7. 9. The floor structure according to claim 1, wherein a void portion is formed inside the floor slab block. 10. The method according to claim 1, wherein the vibration insulating material is made of at least one material selected from the group consisting of rubber, plastic, fiber, foam, and paper.
The floor structure according to claim 9. 11. The floor structure according to claim 1, wherein the vibration insulating material comprises a cured product of a liquid polymer.