JP3167926B2 - Floor slab structure - 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 slab of a building, which is suitable for a floor in a residential area where measures to reduce floor impact noise are required. In particular, it is particularly suitable for floors of flexible structures such as wooden houses and prefabricated steel frames, such as detached houses and low-rise apartments.

[0002]

2. Description of the Related Art Conventionally, for floors having a rigid structure such as RC structure, as a countermeasure for reducing floor impact noise, heavy floor impact noise is generally solved by increasing the thickness of the floor slab, and the weight is reduced. The floor impact noise is solved by softening the floor finishing material. On the other hand, in the case of a floor with a soft structure such as a detached house or a low-rise apartment, the light floor impact sound is dealt with by softening the finishing material of the floor as described above, but the heavy floor impact sound is not affected. , A ALC floor slab, a mortar with a thickness of 30 to 50 mm is placed on a discarded plywood, or a high specific gravity plate made into a plate by mixing iron ore slag or iron powder with asphalt. However, at present, the expected effects have not been obtained.
In addition, in the above method, for the purpose of increasing the weight or increasing the rigidity of the floor, columns and beams need to be reinforced, in which case the cost is high, and when a wet method such as mortar is employed, There is an inconvenience that the construction period becomes longer due to the step of curing and drying.

[0003] Over the past ten years, house makers, soundproofing material suppliers, construction workers, and the like have required a large amount of personnel and time to search for improvement measures. This is a countermeasure and a solution is very much awaited.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to move the floor slab to a medium to high temperature range of 250 Hz or higher in which the sound frequency band of the floor slab is easily controlled, and to prevent the vibration of the floor slab from being transmitted to walls and ceilings. By incorporating a sound absorbing space into the slab, the slab alone reduces radiated sound within the thickness of the slab, the weight of the slab is reduced as much as possible, the generated frequency band is moved to 250 Hz or more, and columns and beams are used. To make building work safer and easier by reducing the weight burden on buildings, to be strong enough to withstand long-term use and to be practical in terms of cost, and to adversely affect workability and construction period at construction sites To provide a floor slab that combines

[0005]

In order to achieve the above object, the present invention has the following arrangement. (1) A floor slab structure including a plurality of adjacent units, a frame member that defines the floor slab in each unit, an upper member provided above the frame, and a lower member provided below. And a space portion is defined by these. (2) A side member is further provided on the space portion side of the frame member, and the side member, the upper member, and the lower member define a space portion to constitute a hollow body. (3) A vibration insulating material is interposed between the frame member and the hollow body. (4) An opening communicating with the space is formed in at least one of the upper member and the lower member that define the space. (5) At least one of a sound absorbing material, a sound wave reflecting material, a sound insulating material, a reinforcing material, and a dynamic vibration absorbing material is applied to the space. (6) The present invention is characterized in that a constrained damping material of a type sandwiching both surfaces is applied to at least one of an upper member, a lower member, and a side member.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. (1) Examples of the material of the frame member of the floor slab of the present invention include metals such as iron, stainless steel and aluminum; wood materials such as wood, laminated wood and plywood; polymer materials such as FRP and plastic; cement and gypsum. Inorganic materials and the like can be mentioned, and they may be used alone or in combination. The shape can be a hollow body, bent, extruded, or the like, and there is no particular limitation. There is no limitation on the cross-sectional shape. As for the flexibility, it is a condition that the floor slab can withstand a long term. In addition, the size may be any size suitable for ordinary houses in the vertical and horizontal directions, but the thickness is preferably 40 mm to 300 mm. When the thickness is less than 40 mm, the thickness of the air layer in the space becomes insufficient, so that the sound absorbing effect is reduced and the object of the present invention is deviated. On the other hand, if the thickness exceeds 300 mm to secure the air layer thickness, the ceiling height and eave height of the building must be increased, so the sound performance is improved, but the construction cost is high, which is not suitable. is there. Further, if the upper member is made thinner to cope with it, the floor cannot withstand the floor load or the local deflection becomes large, so that there is a high danger that the performance which the floor should originally have is lost. Furthermore, the partition intervals of the frame member may be equal or non-uniform. However, in order to reduce the amount of low frequency component sounding, it is preferable to make the interval at the center narrow and widen the ends. Gives good results, and the spacing is 20 cm to 90
cm. In other words, as the interval is increased, the low-frequency component increases, and conversely, as the interval is reduced, the low-frequency component decreases and the sound performance improves, but the number of frames increases, so that the weight increases and the cost increases. .

The materials of the upper member, the lower member, and the side members are wood materials such as plywood, particle board, and hard board;
Inorganic materials such as hollow extruded cement boards, flexible boards, gypsum boards, wool cement boards, and glass; metal materials such as iron and lead plates; synthetic resin materials such as polyethylene, polypropylene, vinyl chloride, polystyrene, and phenol; natural rubber; Rubber materials such as butyl rubber, chloroprene, styrene butadiene, butadiene ethylene propylene terpolymer, and urethane can be exemplified. The upper member, the lower member, and the side members are basically in a plate shape, and are physically formed with nails, wood screws, bolts, or the like, chemically formed with an adhesive, or the like, and are mounted on the frame member. It can be fixed to a material or a side member, or, in the case of a hollow body, is integrally formed of a polymer material such as plastic or rubber, or a hydraulic material such as cement or gypsum. These can be laminated with the same or different types of plate-like or sheet-like materials as necessary. In this case,
The material of the laminated material used for lamination is a synthetic resin material, a rubber material, and a foam of these materials, a synthetic fiber such as polypropylene, polyester, acrylic, or nylon, or a sheet of natural fiber such as cotton or hemp. Examples thereof include a sheet or the like in which a cross-linked viscoelastic material that undergoes a room-temperature curing reaction is filled in a concave portion of a film substrate having a convex portion having an independent air chamber and a concave portion of only a film alternately. When laminated with the same kind or different kinds of plate-like materials, the sound quality of the generated sound often changes, and a combination with different kinds of materials is particularly preferable.

The space portion is a portion that is inevitably formed when the frame of the floor slab is formed, and this space portion is an air layer for sound absorption and is also the least costly sound absorbing material. Also, this space is provided by providing the upper and lower members vertically with a frame member as a support member, or by supporting a hollow body such as a box by a frame frame member or a support member provided on the frame member. There is a way. At this time, by providing openings in the upper member and the lower member, it is possible to enhance the sound absorbing effect of the space, particularly the sound absorbing effect on the low frequency side.

(3) The vibration insulating material prevents rattling noise caused by contact between the frame member and the hollow body, and also applies vibration received by the hollow body to the frame member and vibration of the frame member to another hollow body. It is used for the purpose of making transmission difficult, and may be attached to a frame member or a hollow body in advance. The material is SIS, S
Thermoplastic elastomers such as BS, butyl rubber, natural rubber, rubbers such as EPT, SBR, BR; synthetic resins such as polyethylene, vinyl chloride, polypropylene, polystyrene; foams of the rubbers and synthetic resins; polypropylene, nylon, polyester, acrylic , Rayon, cotton and other fibers; urethane, silicone, modified silicone, thiochol,
Room temperature reaction-curable sealing materials such as liquid polybutadiene and the like can be mentioned. These may be used alone or in combination.

(4) The members installed in the space will be described. Sound absorbing material absorbs sound energy,
Inorganic fibers such as glass wool and rock wool; metal fibrous materials such as iron and aluminum; natural fibers such as cotton, kapok and hemp; synthetic fibers such as polypropylene, nylon and polyester; natural rubber, ethylene propylene terpolymer rubber, Foam having an open cell structure with chloroprene, urethane, polyethylene, polypropylene, hydroxyl-terminated liquid polybutadiene rubber, hydroxyl-terminated polychloroprene rubber, etc. as the main polymer; communicating holes formed by hardening rubber, cork, and crushed foam with a binder Having porous body; AL
C. Crushed product, perlite, porous body having a communicating hole formed of foamed aluminum, etc .; container having an opening; plate having a hole; These can be used alone or in combination, and the sound absorption frequency can be adjusted.

The sound wave reflecting material changes the traveling direction of the sound to make it difficult for the sound to be transmitted to the lower surface of the floor slab, and is made of a corrugated, folded, convex, concave, or pyramid-shaped metal plate. Hydraulic materials such as cement and gypsum; plastics, etc., which reduce the sound radiated downstairs by lengthening the sound path. This effect can be improved by combining it with a sound absorbing material or with a sound insulating material described below.

The sound insulation material reduces sound transmitted through the sound insulation material by repelling sound energy toward the sound source. Since the performance approximates to the mass law, the performance is improved particularly in proportion to the areal density. However, it is necessary to pay attention to the frequency at which the coincidence effect occurs. Specific examples thereof include metallic materials having a large specific gravity such as lead and iron; inorganic materials such as glass, cement plate, gypsum board, and hollow extruded cement plate; and high-density materials such as vinyl chloride and butyl rubber containing a large amount of a high specific gravity filler. There are molecular materials and the like, and these can be used alone or in combination.

The reinforcing material is used to reinforce the upper member of the floor slab, and to change the sound quality when receiving an impact, that is, the generated frequency component. Many materials can be used for this, such as wood; metal; inorganic materials such as cement and gypsum, and can be appropriately selected depending on the desired strength, deflection, and sound performance.

The dynamic vibration absorbing material is used for adding a weight to a vibrating object via a spring material, thereby changing the phase of the vibration to reduce the amplitude and increasing the damping speed. Examples of the spring used for the dynamic vibration absorbing member include a coil spring, a plate spring, a disc spring, rubber, a foam, and the like, and examples of the weight include a metal such as iron, and a cured product of cement or gypsum. For these, it is necessary to appropriately set the spring performance, the weight of the weight, and the like according to the vibration state of the upper member. In addition, it is desirable to provide a weight drop prevention function in case of emergency.

(5) A constrained damping material in which a damping material is sandwiched between plate-like objects such as an upper member may be applied. To become
This is effective in preventing vibration transmission between the partitioned floor slabs. In this case, it is necessary to be careful that the amount of displacement of the laminated material and the vibration damping material does not increase with respect to the compressive load. If the amount of displacement is too large, when finishing the floor on the floor slab of the present invention, laying a laminating plate or particle board etc. and applying a finishing material on it, resonance will occur and specific frequency components will increase It is necessary to keep in mind that there is a possibility that a phenomenon that the floor slab occurs may occur, and that when the finishing material is directly used for the floor slab of the present invention, a floor noise phenomenon may occur.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. In addition, reference numerals in [] refer to reference numerals in the drawings, and are common to all drawings. (Example 1) Three floor slabs were prepared as test samples. Its outer dimensions are 900 mm wide x 1800 mm long x 100 thick
mm, and the details of the structure are as follows (see FIG. 1). Frame member [1]: Wood, width 50 mm × height 100 mm (cross-sectional dimension) Frame: 290 mm long, 425 mm wide between the cores of the frame member
mm grid-like upper member [2]: plywood, thickness 12 mm x length 373 mm x width 238 mm Fixed to a support member of the upper member with a wood screw. Opening [6]: a hole of 100 mm diameter in the center of the upper member. Supporting member [4]: wood, width 25 mm x height 50
mm Fixed with wood screws 12 mm below the top of the frame member on the inner periphery of the space. Lower member [3]: gypsum board, thickness 12.5 mm × length 37
3 mm x 238 mm wide, fixed to a lower branch member with a wood screw Lower member support member [4]: plywood, 12 mm thick, 110 mm central width, 80 mm peripheral width, 30 mm receiving width,
Fixed with wood screws on the lower side of the frame member Space [5]: No treatment

(Embodiment 2) This embodiment is the same as Embodiment 1 except that the opening is formed not in the upper member but in the lower member (see FIG. 2). Opening [6]: 100 mm diameter hole in the center of the lower member

Example 3 An opening was formed in both the upper member and the lower member, and in the space, a sound absorbing material was put on the lower member, and a sound wave reflecting material and a sound insulating material were put on the sound absorbing material. This is the same as in Example 1 (see FIG. 3). Opening of upper member [6]: hole of 20 mm diameter at 50 mm pitch Lower member opening [6]: hole of 50 mm diameter at 100 mm pitch Sound reflector / sound insulating material [7]: corrugated slate plate, thickness 5 m
m Sound absorbing material [8]: felt, thickness 30 mm

(Embodiment 4) In the space portion, a sound absorbing material and a vibration isolating material were placed on a lower member, a sound wave reflecting material and a sound insulating material were placed thereon, and a sound absorbing material was placed thereover in the space. Others are the same as the first embodiment. (See FIG. 4). Sound absorbing material [8]: 24 ^K glass wool, thickness 25 mm Sound reflecting material and sound insulating material [7]: corrugated slate plate, thickness 5 m
m Sound absorbing and vibration isolating material

[9]: 30 mm thick open cell urethane

Example 5 Three slabs were prepared as test samples. Its outer dimensions are 905mm wide x 1825mm long
× The thickness is 105 mm, and the details of the structure are as follows (see FIG. 5). Frame member [1]: The periphery is a 5 mm-thick L-section steel, and the inner side is two L-section steel EPs with a thickness of 5 mm.
Back-to-back with T rubber sponge in between, used as a T-shaped cross section. Frame: Between the outside of the L-shaped cross section steel 300mm long × 450 wide
mm Supporting member [4]: The projection below the L-shaped steel section is used as the supporting member. Hollow body: box-shaped, 285 mm long x 435 mm wide x 97 height
mm Upper member of hollow body [2]: Laminate plate of 12 mm thick plywood (upper side) and 12.5 mm thick gypsum board (lower side), 285 mm long x 435 mm wide Side nailed to side member Hollow body side Member [11]: wood, width 25 mm x height 60
mm Lower member of hollow body [3]: gypsum board, thickness 12.5 mm Nail-fixed to side member Vibration insulating material [10]: A 3 mm-thick EPT rubber sponge is attached to the upper side of the support member and the outer periphery of the side member . As the assembling sequence, a box-shaped hollow body is formed, and a vibration insulating material is attached to a side periphery thereof. Then, this is partitioned by a frame member, and a partition including a support member having a vibration insulating material attached to the upper side. By fitting inside.

Example 6 Three slabs were prepared as test samples. Its outer dimensions are 900mm wide x 1800mm long
X 237 mm in thickness, and details of the structure are as follows (see Fig. 6). Frame member [1]: wood, width 50 mm × height 100 mm (cross-sectional dimension) Frame: 290 mm long × 425 mm wide between the cores of the frame member
mm Supporting member [4]: The frame member itself also serves as the supporting member. Hollow body: box-shaped upper member protruding Upper member of hollow body [2]: laminated board of 12 mm thick plywood (upper side) and 12.5 mm thick gypsum board (lower side), frame around floor slab 3 mm inside from the outer surface of the member, 3 mm inside from the center of the width of the frame member, 284 mm long × 419 mm wide, nailed to the side member Side member of the hollow body [11]: wood, width 25 mm × height 20
0 mm (cross-sectional dimension) Lower member of hollow body [3]: gypsum board, thickness 12.5 mm Fixed to side member with wood screw Sound absorbing material [8]: open-cell urethane with irregular upper surface, thickness 5
0 mm Vibration insulating material (10): non-woven fabric, 3 mm thick Affixed to the inner surface of the space separated from the upper surface of the frame member and the periphery in the height direction of the upper member. The sound absorbing material is put in, the upper member having a vibration insulating material adhered to the periphery is fixed to the side member, and then fitted into a section partitioned by a frame member having the vibration insulating material adhered to the upper surface and the inner side surface.

Example 7 Three floor slabs were prepared as test samples. Its outer dimensions are 905mm wide x 1825mm long
× thickness 109.5 mm, the details of the structure are as follows (see FIG. 7). Frame member [1]: L-section steel on the periphery, two sections L on the inside
The steel is back-to-back with a 5mm thick EPT rubber sponge in between, and used as a T-shaped cross section. Frame: Between the outside of the L-shaped cross section steel 300mm long × 450 wide
mm Supporting member [4]: The projection below the L-shaped steel section is used as the supporting member. Hollow body: box-shaped, 289 mm long x 439 mm wide x 1 height
Upper member [2] of a 00 mm hollow body: a laminated plate of a 12 mm thick plywood (upper), a 20 mm thick hollow extruded semeton plate (middle) and a 12.5 mm thick gypsum board (lower), length 28
9 mm x 439 mm wide Fixed to the side member with a wood screw Side member of the hollow body [11]: wood, width 30 mm x height 43
mm Lower member of hollow body [3]: gypsum board, thickness 12.5 mm Fixed to side member with wood screw Opening [6]: hole of 100 mm diameter in center of lower member Vibration insulating material [10]: thickness A 3 mm EPT rubber sponge is attached to the upper side of the support member and the outer periphery of the side member. As an assembling sequence, a box-shaped hollow body is formed, a vibration insulating material is attached to a side periphery thereof, and this is fitted into a section partitioned by a frame member to which the vibration insulating material is attached.

Example 8 Three slabs were prepared as test samples. Its outer dimensions are 905mm wide x 1825mm long
× thickness 107.5 mm, the details of the structure are as follows (see FIG. 8). Frame member [1]: L-section steel on the periphery, two sections L on the inside
Back-to-back with a 5mm thick felt,
Used as T-shaped cross section. Frame: Between the outside of the L-shaped cross section steel 300mm long × 450 wide
mm Supporting member [4]: The projection below the L-shaped steel section is used as the supporting member. Hollow body: box-shaped, 289 mm long x 439 mm wide x 10 height
Upper member [2] of a 0 mm hollow body: a laminated plate composed of two plywoods having a thickness of 12 mm, with a restrained damping material interposed therebetween. Fixed to the side member with a wood screw Restraint type vibration damping material [12]: Foam obtained by reaction between hydroxyl-terminated liquid polybutadiene rubber and isocyanate,
Thickness 2 mm Side member of hollow body [11]: wood, width 30 mm x height 6
1.5 mm hollow body lower member [3]: gypsum board, thickness 12.5 mm Fixed to side member with wood screw Vibration insulator [10]: 3 mm thick butyl rubber sheet in contact with frame member hollow body Paste in. In the assembling order, a box-shaped hollow body is formed, and this is fitted into a section partitioned by a frame member to which a vibration insulating material is attached.

Example 9 Three slabs were prepared as test samples. Its outer dimensions are 905mm wide x 1825mm long
× thickness 106.2 mm, and details of the structure are as follows (see FIG. 9). Frame member [1]: L-section steel on the periphery, two sections L on the inside
The steel is back-to-back with a 5mm thick EPT sponge in between and used as a T-shaped cross section. Frame: Between the outside of the L-shaped cross section steel 300mm long × 450 wide
mm Supporting member [4]: The projection below the L-shaped steel section is used as the supporting member. Hollow body: box-shaped, 287 mm long x 437 mm wide x 10 height
0mm hollow body upper member [2]: thickness 9mm (upper) and 12mm
(Lower side) and a laminated plate composed of two plywoods, with a restrained damping material interposed therebetween. Fixed to the side members with wood screws. Restraint type vibration damping material [12]: crosslinked hydroxyl-terminated liquid polybutadiene, thickness 2 mm. Dynamic vibration absorbing material: bolt [13] and nut, low-hardness vibration-proof rubber (hardness 40, diameter 80 mm, thickness). Spring material [14] made of 20 mm in height, with a cross section having an irregular shape, and an iron plate (100 mm long)
× 300 mm wide × 5 mm thick) [15]. Four bolts per hollow body are used to connect the lower plywood and weight to the lower part of the upper member.
It penetrates through the four spring materials through the bolt holes at each location and is fixed with nuts. A hole was made in the lower part of the nut of the bolt, and a fall prevention pin was inserted by loosening the nut due to vibration. Side member of hollow body [11]: wood, width 30 mm x height 6
4.5 mm Lower member of hollow body [3]: gypsum board, thickness 12.5 mm Fixed to side member with wood screw Sound absorbing material [8]: open-cell urethane with mountain cross section, thickness 3
0 mm vibration insulating material [10]: 3 mm thick low hardness vulcanized rubber,
It was stuck on the upper side of the support member, and was further provided on the side surface of the hollow body at intervals in a bee-like shape. In the assembling sequence, a box-shaped hollow body is formed, and a bee-shaped vibration insulating material is provided on the hollow body. The hollow body is fitted in a section partitioned by a frame member.

Example 10 Three floor slabs were prepared as test samples. Its outer dimensions are 905mm wide x 1825m long
m × 106.2 mm in thickness, and the details of the structure are as follows (see FIG. 10). Frame member [1]: L-section steel on the periphery, T-section steel on the inside Frame: 300 m vertically between the outside of the L-section steel and the T-section steel
mx 450 mm in width Supporting member [4]: The lower projections of the L-section steel and the T-section steel are used as the support member. Hollow body: box-shaped, 287 mm long x 427 mm wide x 10 height
0 mm hollow body upper member [2]: natural rubber vulcanized rubber plate, thickness 1
0 mm × 287 mm × width 427 mm Side member of the hollow body [11]: The long side of the hollow body also serves as a reinforcing material and a sound insulating material, and the short side is a 5 mm thick styrofoam plate, which is adhered with a water-based acrylic adhesive. . Reinforcing material [17]: Recovered butyl rubber-based adhesive paint coated and dried on an iron plate having a thickness of 0.8 mm Reinforcing material and sound insulation material [16]: Tunnel-like mortar The internal dimensions are 287 mm long x 427 mm wide x height in advance 75mm
As shown in FIG. 10, a reinforcing material composed of an iron plate formed by bending a central portion in the short side direction as shown in FIG. 10 and having a cross section continuous in the longitudinal direction and an adhesive paint applied and dried thereon. Then, mortar is poured from above, and after curing, it is removed from the mold to obtain a tunnel-like reinforcing and sound insulating material. Lower member [3] of hollow body: plywood, thickness 12 mm Affixed to the bottom of side member (reinforcing material) with urethane adhesive. Sound absorbing material [8]: Felt, 30 mm Restraint type vibration damping material [12]: Regenerated butyl rubber-based viscoelastic material, 2 mm thick, affixed to the upper surface of sound insulating material Vibration insulating material [10]: 3 mm thick, low hardness A vulcanized butyl rubber is provided at a contact portion of the frame member with the hollow body. As for the assembling order, the lower member is attached to the side member only on the long side composed of the reinforcing material, the sound absorbing material is put in the space, the side member on the short side is attached, and the upper surface of the reinforcing material and sound insulating material is attached. A constrained vibration damping material is attached, and an upper member is further provided thereon to obtain a box-shaped hollow body, which is fitted in a section partitioned by a frame member to which a vibration insulating material is attached.

(Comparative Example 1) A comparative example 1 is a floor slab ALC width 600 mm ×
4 pieces of 1800mm length x 100mm thickness, AL
C width 300mm x length 1800mm x thickness 100mm1
Was used as a sample. This is set in the opening of the test room, and mortar is applied with a thickness of 20 mm on the ALC slab,
After drying, the test was performed.

(Test method) Heavy floor impact noise was measured according to JIS-A
-1418 ". Table 1 shows the improvement (unit: dB) of the weight floor impact sound of each example with respect to the weight floor impact sound in Comparative Example 1. FIG.
Is a schematic diagram showing the outline of this test. FIG. 12 shows hit points, and FIG. 13 shows sound receiving points. In FIG. 11, a bang machine 18 is installed on a floor slab structure 19, and FIG.
A hit was applied at the position shown in FIG. 20 is a microphone, 2
1 is a precision sound level meter, 22 is a frequency analyzer. The installation positions of the microphones are shown in FIG. Table 1 shows the test results.

[0028]

[Table 1]

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 inside of the floor slab is divided by a frame member which is a skeleton, plate materials are provided on upper and lower sides, and an opening is provided on the upper member. Because the floor slab is composed of a plurality of units, low frequency components are greatly reduced,
At 25 Hz, it is improved by two ranks. Further, by opening the floor slab partitioned into small blocks, a sound absorbing effect is produced, and the sound is improved even in the middle and high range.

Embodiment 2 is an example in which the interior of the floor slab is divided by a frame member, plate members are provided on the upper and lower sides, and an opening is provided in the lower member. The same effect as in the first embodiment is obtained, and the low frequency (63
(Hz, 125 Hz). Also,
It has also been improved in the mid-high range.

In the third embodiment, the inside of the floor slab is divided by a frame member, and plate members are provided on the upper and lower sides. Each of the plate members is provided with an opening, and in the space, a 30 mm thick felt, a sound wave reflecting material and a sound insulating material are used as sound absorbing materials. This is an example in which a 5 mm thick corrugated sheet slate is provided as a material. It is improved by two ranks at low frequencies (63 Hz, 125 Hz), and the amount of improvement in the mid-high range is also large.

In the fourth embodiment, the inside of the floor slab is divided by a frame member, plate materials are provided on the upper and lower sides, and a 25 mm thick 24k glass wool, 5 mm
This is an example in which a thick corrugated sheet slate and a 30 mm thick urethane foam are laminated. There is an improvement of 13 dB at 63 Hz and 14 dB at 125 Hz, which is an improvement of three ranks. In the middle and high range, the noise is improved by 15 dB to 27 dB.

Embodiment 5 is an example in which a partition is divided by a frame member in a floor slab, and a box-shaped small slab is provided in each of the partitions. 11dB at 63Hz, 13d at 125Hz
B has been improved, and two or more ranks have been improved. Even in the mid-high range, it is improved by 16 to 21 dB.

In the sixth embodiment, the inside of the floor slab is divided by a frame member, and a box-like body having a slightly larger upper member is provided in each of the partitions, and the irregular open-cell urethane is provided in the box-like body. This is an example in which the sound absorbing material is used. 63Hz, 125H
With z, the improvement amounts are 14 dB and 15 dB, respectively, and are improved by three ranks. The mid-high range is also improved by 20-29 dB.

In the seventh embodiment, the inside of the floor slab is divided by a frame member, and a box-like body is provided in each of the compartments. The upper member is a 12 mm thick plywood, a 20 mm thick hollow extruded cement board, This is an example in which a 0.5 mm thick gypsum board is laminated, and an opening is provided in the lower member. 12dB at 63Hz,
14dB improvement at 125Hz and 17dB improvement in mid-high range
dB to 21 dB has been improved.

In Example 8, a box-like body was provided as a small piece slab in a partition by a frame member in a floor slab, and a hydroxyl group-terminated liquid polybutadiene rubber was provided between two 12 mm plywoods on the upper member. This is an example in which a restraint type damping material made of a foam is provided. 15dB at 63Hz, 16dB at 125Hz
, There was a very large reduction, and three ranks could be improved. In addition, there was an improvement effect of 19 to 28 dB even in the middle and high range.

In Example 9, the inside of the floor slab was partitioned by a frame member, and box-like bodies were provided as small-piece floor slabs in each of the sections. The upper member was a 2 mm thick hydroxyl-terminated liquid between 9 mm plywood and 12 mm plywood. A cross-linked polybutadiene is provided as a restraining type vibration damping material, and a dynamic vibration absorber is provided in the space inside the box-shaped body, in which the weight of an iron plate is suspended by a spring material of low hardness uneven rubber. Is provided with a thickness of 30 mm. 17dB at 63Hz, 19dB at 125Hz
And a great improvement effect of 23 to 35 dB even in the middle and high range.

In the tenth embodiment, the inside of the floor slab is divided by a frame member, and a box-like body is provided as a small piece slab in each section, and a 0.8 mm-thick iron plate and a mortar are used as a reinforcing material and a sound insulating material. The center part in the side direction is arch-shaped, and the same cross section is a tunnel-shaped object that continues in the longitudinal direction.
A thick polystyrene plate is attached, a 30 mm thick felt is provided as a sound absorbing material in the space, a regenerated butyl rubber-based viscoelastic material is provided as a vibration damping layer on the tunnel-like material, and a natural rubber-based vulcanized rubber is further provided thereon. This is an example. 16 at 63 Hz
There was a significant improvement of 15 dB at 125 dB at 125 Hz, and a significant improvement of 21 to 34 dB in the mid-high range. In addition, by making the hollow body a polymer material, it is possible to change the sound generation amount and the generated frequency region, and it is possible to make the hollow body hard to vibrate.

As described above, the AL for floor slabs which have been frequently used in the past.
63 Hz or 125 which is hard to reduce compared to C (Comparative Example 1).
At a low frequency of 6 Hz, both embodiments are 8 Hz at 63 Hz.
Up to 17 dB, there is an improvement effect of 9 to 19 dB at 125 Hz, which was not seen before.
By using sound insulation, vibration suppression, dynamic vibration absorption, and the like together, it is possible to improve even middle and high-pitched sounds, and it is possible to improve not only the floor slab that only improves low frequency but also all frequencies. Since the mid-high range can be further improved by using a ceiling or the like in combination, this has great industrial utility value and has solved the long-awaited problem for the first time.

[0040]

According to the present invention, the following effects can be obtained. (1) A frame member that divides a floor slab into a plurality of sections, an upper member provided above the frame, and a lower member provided below the frame, the frame member, the upper member, and the lower member. With the configuration having the space defined by (1) and (2), low frequency components are reduced.

(2) A frame member for partitioning the floor slab into a plurality of sections, and an upper member which is fitted in the section partitioned by the frame member.
By including a hollow body having a space defined by the lower member and the side members, the floor slab, which is an aggregate of the divided small slabs, vibrates locally with a small area, The radiation volume in the low frequency region can be reduced. In addition, since each small slab has a space portion, the space acts as a sound absorbing structure, absorbs radiated sound more up to the high frequency range, and the radiated sound volume from the slab from low frequency to high frequency range within the thickness of the slab Can be reduced. Further, since the floor slab has a space, the weight can be reduced, and at the same time, the low frequency component of the generated frequency upon impact due to the light weight decreases.

(3) Since the vibration insulating material is interposed between the frame member and the hollow body, transmission of vibration is reduced,
Resonating walls and ceilings is avoided. (4) Since the opening communicating with the space is formed in at least one of the upper member and the lower member that define the space, low-frequency components can be further absorbed.

(5) A sound absorbing material, a sound wave reflecting material,
The following effects can be obtained by adopting a configuration in which at least one of the sound insulating material, the reinforcing material, and the dynamic vibration absorbing material is applied. When a sound absorbing material is applied, the sound absorbing efficiency of high frequency components is improved. When a sound wave reflecting material is applied, the medium and high frequency components are somewhat reduced. When a sound insulating material is applied, the effect of reducing high-frequency components becomes higher, and it is more effective when used together with a sound absorbing material. In addition, since each member is made of a relatively heavy material, the member itself can have a sound insulation effect. The reinforcing material is applied to reinforce the upper member, but there is a frequency range in which the radiated sound volume of the high frequency changes, and it can be used as a means of frequency control and further to increase the strength of the upper member. The dynamic vibration absorbing material hangs a heavy object such as an iron plate on the upper member via a spring material such as vibration isolating rubber to cause vibrations in the opposite phase to the vibration of the upper member, thereby speeding up vibration damping. However, this is also an effective means for controlling a specific frequency by adjusting the weight and the spring material.

(6) When at least one of the upper member, the lower member, and the side member employs the restraint type vibration damping material, the vibration is attenuated quickly and the generated sound volume can be reduced. (7) When at least one of the frame member, the upper member, the lower member, and the side member is made of a polymer material such as plastic or rubber, the amount of sound and the frequency range of generation can be changed, and vibration is more difficult. Things.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a sample of a floor slab of Example 1.

FIG. 2 is a partial cross-sectional view showing a sample of a floor slab of Example 2.

FIG. 3 is a partial cross-sectional view illustrating a sample of a floor slab according to a third embodiment.

FIG. 4 is a partial cross-sectional view showing a sample of a floor slab of Example 4.

FIG. 5 is a partial cross-sectional view illustrating a sample of a floor slab according to a fifth embodiment.

FIG. 6 is a partial cross-sectional view showing a sample of a floor slab of Example 6.

FIG. 7 is a partial cross-sectional view illustrating a sample of a floor slab according to a seventh embodiment.

FIG. 8 is a partial sectional view showing a sample of a floor slab according to an eighth embodiment.

FIG. 9 is a partial cross-sectional view illustrating a sample of a floor slab according to a ninth embodiment.

FIG. 10 is a partial cross-sectional view showing a sample of a floor slab of Example 10.

FIG. 11 is a schematic diagram showing an outline of an impact sound test facility.

FIG. 12 is a plan view showing impact points on the floor.

FIG. 13 is a plan view showing a sound receiving point of the sound receiving room.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame member 2 Upper member 3 Lower member 4 Support member 5 Space part 6 Opening part 7 Sound reflection material and sound insulation material 8 Sound absorption material 9 Sound absorption material and vibration insulation material 10 Vibration insulation material 11 Side member 12 Restraint type vibration damping material 13 Bolt 14 Spring material 15 Weight 16 Reinforcement and sound insulation material 17 Reinforcement material

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-43443 (JP, A) JP-A-7-292283 (JP, A) JP-A-8-13641 (JP, A) JP-A-6-294 330607 (JP, A) Japanese Utility Model Laid-open 2-121515 (JP, U) Japanese Utility Model 5-96113 (JP, U) Japanese Utility Model Laid-open 4-82248 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) E04B 5/43

Claims (6)

(57) [Claims] 1. A floor slab structure comprising a plurality of adjacent units, a frame member defining a floor slab in each unit, an upper member provided on an upper side of the frame, and a frame member provided on a lower side. A floor slab structure comprising a lower member and defining a space with the lower member. 2. The apparatus according to claim 1, further comprising a side member on the space side of the frame member, wherein the side member, the upper member and the lower member define a space to form a hollow body. The floor slab structure according to claim 1. 3. The slab structure according to claim 2, wherein a vibration insulating material is interposed between the frame member and the hollow body. 4. The floor slab structure according to claim 1, wherein an opening communicating with the space is formed in at least one of an upper member and a lower member that define the space. 5. The floor according to claim 1, wherein at least one of a sound absorbing material, a sound wave reflecting material, a sound insulating material, a reinforcing material, and a dynamic vibration absorbing material is applied to the space. Plate structure. 6. A constrained damping material of a type sandwiched on both sides is provided on at least one of an upper member, a lower member, and a side member,
The floor slab structure according to claim 1, 2, 3, 4, or 5, wherein the floor slab structure is applied.