JPH03176561A - Sound insulating double floor structure and floor panel - Google Patents

Abstract

PURPOSE:To increase a sound insulating capacity and depress the propagation of air vibration in horizontal directions in the down-floor space, by elastically fixing suspended plates to the bottoms of floor panel members of the down-floor space in such a way that cantilever vibration of the plates can take place. CONSTITUTION:Floor panel members 2 are arranged in parallel with each other via a plurality of level-adjustable supporting legs 3 on the floor substrate 1 made of a concrete floor slab or the like and the down-floor space 5 is defined thereunder to form a sound insulating double floor structure A. Next, the upper edge of the suspended plates 6 in no contact with the floor substrate 1 is so fixed elastically to the bottoms of the floor panel members 2 as to vibrate with one end of the plate fixed. And this prevents the propagation of the air vibration generated in the down-floor space 5 in horizontal directions and also prevents the vibration of the floor panel member 2 itself.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a soundproof double floor structure and a floor panel. The present invention relates to a soundproof structure of a double floor arranged side by side with legs interposed therebetween, and a floor panel used in the soundproof structure of the double floor.

(Prior Art) The above-mentioned double-floor acid floor panels are mainly used for the floors of medium-to-high-rise buildings and condominiums, and have a plurality of level-adjustable layers on the bottom surface of the floor panel material that support the floor panel material. A floor installation structure and a floor panel in which a floor panel equipped with supporting legs is juxtaposed on a subfloor made of a concrete floor slab or the like via the supporting legs to form an underfloor space below the floor panel material. It has been known.

Such double floor structures and floor panels have the advantage that unevenness on the surface of the subfloor can be absorbed by the support legs, so there is no need to smooth the subfloor, and there is no need to smooth the subfloor under the floor panel material. Since the space is continuous in the horizontal direction, it has the advantage that piping and wiring work on the ground surface under the floor is easy, so it is widely used in the above-mentioned medium and high-rise buildings.

(Problem to be Solved by the Invention) However, when a floor impact force acts on the upper surface of the floor panel material in the above-mentioned double floor structure or floor panel, and the air in the underfloor space vibrates due to the vibration of the floor panel material, Since the underfloor space is continuous in the horizontal direction, air vibrations in the underfloor space are spread horizontally and transmitted over a wide range.

For this reason, in the above-mentioned double floor structure and floor panel, the floor impact sound generated on the upper floor is transmitted to the lower floor as a large impact sound, and there is a problem that the soundproofing performance is insufficient.

Furthermore, in the above-mentioned double floor structure or floor panel,
The support legs usually have an elastic body at the lower end to prevent the impact force from the floor panel material from being transmitted to the subfloor, but when the impact force is applied to the floor panel material, Due to repeated compression and restoration of the elastic body, the floor panel material vibrates repeatedly in the vertical direction. Therefore, when a floor impact force is applied, the vibration of the floor panel material continues for a long time, making it difficult for air vibrations in the underfloor space to be attenuated, and floor impact noise is transmitted to the downstairs.

In view of the above, an object of the present invention is to improve the soundproofing performance of a double floor structure and a floor panel.

(Means for Solving the Problem) In order to achieve the above object, the inventions of claims (1) and (2) provide a hanging plate capable of cantilever vibration on the lower surface of the floor panel material. This partitions the space under the floor to prevent the diffusion of air vibrations, and also consumes the vibration energy of the floor panel material by the vibration of the hanging plate.

Specifically, the solution taken by the invention of claim (1) is a soundproof double layer in which a plurality of floor panel materials are arranged side by side on a subfloor made of a concrete floor slab or the like via a plurality of support legs whose levels can be adjusted. Targeting the floor structure, a hanging plate is provided on the lower surface of the floor panel material so as to hang down within a range that does not touch the floor base, and the upper end of the hanging plate cantilevers the hanging plate on the lower surface of the floor panel material. The structure is such that it is elastically attached so that it can vibrate.

Furthermore, the solution taken by the invention of claim 3 is to provide a plurality of support legs for supporting the floor panel material on the lower surface of the floor panel material, and to install the support legs on a subfloor surface made of a concrete floor slab or the like. A hanging board is provided on the lower surface of the floor panel material and hangs down at a height lower than the height of the support legs, and the upper end of the hanging board is connected to the floor panel material. The hanging plate is elastically attached to the lower surface so as to be able to vibrate in a cantilevered manner.

(Function) In the structure of claim (1), a hanging plate is provided on the lower surface of the floor panel material in a range that does not contact the floor substructure, and in the structure of claim (2), Since a hanging plate is installed on the lower surface of the floor panel at a height lower than the height of the support legs, this structure prevents the air generated in the underfloor space when a floor impact force is applied to the upper surface of the floor panel material. The vibration hits the hanging plate. For this reason, air vibrations are difficult to spread horizontally through the underfloor space.

Further, according to the configurations of claims (1) and (2), the upper end portion of the hanging plate is elastically attached to the lower surface of the floor panel material so as to enable the hanging plate to vibrate in a cantilever manner.
The vibration energy of the floor panel material generated when a floor impact force acts on the upper surface of the floor panel material is consumed by causing the hanging plate to vibrate in a cantilevered manner.

Further, according to the configurations of claims (1) and [2), when a floor impact force acts on the upper surface of the floor panel material, the floor panel material vibrates in the vertical direction, but the hanging plate is attached to the lower surface of the floor panel material. Therefore, the vibration of the floor panel material is suppressed by the weight of the hanging board and stops quickly.

Furthermore, in the configuration of claim (1), the hanging plate hangs down from the lower surface of the floor panel material within a range that does not contact the floor substructure, and in the configuration of claim (3), the hanging plate is lower than the height of the support legs. Because it hangs down at a low height, the lower end of the hanging board does not come into contact with the ground surface of the subfloor, so the floor impact force acting on the top surface of the floor panel material is not transmitted to the subfloor.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a soundproof double floor structure A and a floor panel B according to an embodiment of the present invention. The floor panel materials 2 are arranged side by side via a plurality of support legs 3, and the floor panel materials 2
A floor finishing material 4 made of wood floor material, carpet material, etc. is laid on the upper surface, and an underfloor space 4 is formed between the floor base 1 and the floor panel material 2, and the above floor panel B The support legs 3 are provided on the lower surface of the floor panel material 2. Although not shown in the drawings, a lining material made of plywood or the like may be laid between the floor panel material 2 and the floor finishing material 4.

As the floor panel material 2, a wooden board such as plywood or particle board, a wood cement board, a metal molded panel, etc. can be used, and the floor finishing material 4 laid thereon and the rigidity enough to support the floor load can be used. If it has, it can be selected as appropriate.

The support leg body 3 has a truncated cone-shaped elastic body 3a placed on the upper surface of the floor subfloor 1, and an adjustment bolt 3b for height adjustment provided upright on the elastic body 3a. The level can be adjusted by rotating.

Note that the support legs 3 do not necessarily have to be integrated with the floor panel material 2, and may have a structure in which the floor panel material 2 is supported by the support legs 3 via steel joists or wood blocks. good.

A feature of this embodiment is that a hanging plate 6 in the form of a horizontally extending strip is attached to the lower surface of the floor panel material 2 via a support member 7 made of a rubber sheet with a cross-section shaped like a rectangle at its upper end. There is.

Materials for the hanging board 6 include thick paperboard, wood board, metal board,
The material is not particularly limited, such as an inorganic board or a plastic board. Further, as the support member 7, in addition to the above-mentioned rubber sheet, a cloth sheet, a flexible string, a spring, etc. can be used as appropriate, so that when a floor impact force is applied to the floor panel material 2, the hanging board 6 is It suffices if the lower end is elastically attached so that it can vibrate in a cantilevered manner.

The upper limit of the height of the hanging board 6 is a space such that the lower end of the hanging board 6 does not come into contact with the upper surface of the floor base 1 even if an impact force is applied to the floor surface and the floor panel material 2 is bent, for example, a space of 10 mm or more. is preferably formed between the lower end of the hanging plate 6 and the underfloor surface 1. In addition, when piping, wiring, etc. are installed on the subfloor 1, in order to prevent the lower end of the hanging plate 6 from coming into contact with these piping or wiring, there is a gap between the lower end of the hanging plate 6 and the underfloor surface 1. It is preferable to provide a space of about 50 mm.

Furthermore, the lower limit of the height of the hanging board 6 is related to the height of the underfloor space 6, but is preferably one-third or more of the height of the underfloor space 6.

Note that, instead of the above embodiment, a plurality of hanging plates 6 may be sequentially suspended vertically via a plurality of support members 7.

In addition, the height dimensions of the hanging plates 6 are made different, and the under-floor piping parts are installed with lower height ones, and the other parts are installed with higher height ones to reduce the distance from the under-floor equipment. You may adjust it in advance.

As described above, when the hanging plate 6 is provided on the lower surface of the floor panel material 2 via the support member 7 made of a rubber sheet, when a floor impact force is applied to the floor panel material 2, the impact generated in the underfloor space 5. Although the air vibrations try to spread in the horizontal direction, the air vibrations come into contact with the hanging plate 6 and are prevented from spreading, so that the floor impact sound is prevented from spreading in the horizontal direction. Furthermore, when air vibrations in the underfloor space 5 attempt to diffuse in the horizontal direction, they are reflected by the hanging plates 6, but each time the air vibrations are reflected by the hanging plates 6, they are attenuated while consuming vibration energy. , the noise in the underfloor space 5 is quickly reduced. For this reason, if a material that easily reflects sound, such as a metal plate or a hard plastic plate, is used as the material for the hanging plate 6,
The noise in the underfloor space 5 can be reduced even more quickly.

In addition, since the hanging plate 6 is elastically attached to the lower surface of the floor panel material 2 via a support member 7 made of a rubber sheet, when the floor panel material 2 vibrates due to the floor impact force, it will sway in the horizontal direction. vibrates.

In this way, the vibration energy of the floor panel material 2 is expended by lr1, so that the floor impact sound is quickly reduced. For this reason, it is preferable that the hanging plate 6 has mx that is sufficient to attenuate the vibration energy generated in the floor panel material 2 when a floor impact force acts on the floor panel material 2. The floor panel material 2 has thickness: 12mm% and size:
In the case of plywood of 900 mm x 900 mm, it is preferable that the total weight of the hanging board 6 is about 500 g or more.

2 and 3 show modified examples of the hanging plate 6 and the support member 7. In the case of FIG. 2, the hanging plate 6 and the support member 7 are provided with a thin wall portion 7a extending in the longitudinal direction. L at 7a
It is formed of a rubber sheet bent in a letter shape, and the thin wall portion 7a of the rubber sheet constitutes the support member 7;
A portion hanging downward on the lower side of a constitutes a hanging plate 6.

Further, in the case of FIG. 3, the support member 7 is a cloth sheet material, and the support member 7 supports the hanging plate 6 and the cross-sectional shape member 7b attached to the lower surface of the floor panel material 2. Connected on the sides.

In this way, if a bendable or flexible member is used as the support member 7, the hanging board 6 can be bent at the support member 7 and transported while being aligned with the lower surface of the floor panel material 2. 6 is attached, it does not interfere with the conveyance of the floor panel material 2.

FIG. 4 shows a modification of the soundproof double floor structure A and floor panel A according to the above embodiment, and in this modification, the thickness is 0.8 mm.
Thickness:
A 5 mm plywood hanging plate 6 is supported, and sound absorbing material 8 made of glass wool is adhered to both sides of the hanging plate 6.

The material for the sound absorbing material 8 is preferably a porous sound absorbing material, specifically a fibrous mat such as a glass wool mat, a rock wool mat, a synthetic fiber mat, a mixed mat made of pulp and synthetic fibers, or a foamed plastic board. Foamed materials such as foamed inorganic boards are preferred.

When the sound absorbing material 8 is attached to the side surface of the hanging board 6 in this manner, when air vibration hits the hanging board 6 and is reflected, it is absorbed by the sound absorbing material 8, so that the noise in the underfloor space 5 is quickly reduced.

Note that instead of the above modification, the sound absorbing material 8 may be provided only on one side of the hanging plate 6, or instead of the above embodiment, the hanging plate 6 itself may be formed of a material that has sound absorbing properties. .

FIG. 5 shows the distributed state of the hanging plates 6. Three hanging plates 6 are arranged in parallel below one square-shaped floor panel material 2. The plates 6 are arranged in directions perpendicular to each other. When the hanging plate 6 is arranged in this way, the air vibration in the underfloor space 5 is
Since it is easy to come into contact with the air, air vibrations are difficult to spread horizontally, and noise is efficiently reduced. In addition, when piping 9 is provided on the upper surface of the flooring 1 as shown in FIG. 5, the hanging plate 6 may be arranged to avoid the piping 9, or it is not shown in the figure. However, the height of the hanging plate 6 may be lowered.

Hereinafter, a sound insulation performance test for lightweight floor impact sound conducted to evaluate the present invention will be described.

First, as a specific example 1, a soundproof double floor structure shown in FIG. 1 was prepared. That is, a floor finishing material 4 made of a wooden floor with a thickness of 12 mm is laid on a floor panel material 2 made of particle board with a thickness of 30 mm, and an underfloor space 5 with a height of 100 mm is placed below the floor panel material 2. Prepare a double floor structure with a thickness of 12 on the bottom surface of the floor panel material 2.
m m s Height: 80 mm hanging board 6 made of plywood,
It was suspended by two support members 7 made of rubber sheets with a thickness of 0°8 mm.

In addition, as a specific example 2, a double floor structure similar to that of specific example 1 was prepared, and the bottom surface of the floor panel material 2 had a thickness of 3° 2 mm, and the height from the bottom surface of the floor panel material 2 to the bottom end of the hanging plate 6. : 80m
A hanging plate 6 of 12 mm thick is suspended from two supporting members made of rubber sheets with a thickness of 20° and 8 mm, and glass wool with a thickness of 12 mm and a density of 64 kg/m3 is attached to both sides of the hanging plate 6. did.

Furthermore, as a comparative example, a floor structure as shown in FIG. 6, that is, a floor finishing material made of a wooden floor with a thickness of 12 mm is placed on a floor panel material a made of a particle board with a thickness of 30 mm, as in the specific example. A double floor structure is prepared in which an underfloor space C with a height of 100 mm is formed below the floor panel material a, and a sound insulation board e with a thickness of 25 mm is placed on the subfloor d.
A glass wool mat having a mm5 density of 64 kg/m3 was laid over almost the entire surface.

The results of the sound insulation performance test for specific examples 1 and 2 and the comparative example are as shown in Figure 7, and according to the structure of the comparative example, J
I5-A-1418's sound insulation performance against lightweight floor impact sound was L-60, which was at a slightly worrisome level, whereas the sound insulation performance of Example 1 of the present invention was L-53, concrete. The sound insulation performance of Example 2 was at an unnoticeable level of L-50, and it was confirmed that the sound insulation performance of the specific example was about 7 to 10 dB better than that of the comparative example against lightweight floor impact noise. It was done.

(Effect of the invention) As explained above, according to the soundproof double floor structure according to the invention of claim (1), the hanging plate hanging from the lower surface of the floor panel material within the range that does not come into contact with the subfloor can cause cantilever vibration. Because it is attached elastically so that the air vibrations that occur in the underfloor space come into contact with the hanging plates and are difficult to spread horizontally, the vibration energy of the floor panel material is consumed by causing the hanging plates to vibrate in a cantilevered manner. In addition, the vibration of the floor panel material itself is suppressed by the weight of the hanging board and stops quickly, improving soundproofing performance.

Further, according to the floor panel according to the invention of claim (2), the hanging plate hanging down from the lower surface of the floor panel material at a height lower than the height of the support legs is elastically attached so as to be able to vibrate in a cantilevered manner. Therefore, as in the invention of claim (1), the air vibrations generated in the underfloor space come into contact with the hanging plates and are difficult to spread in the horizontal direction, and the vibration energy of the floor panel material causes the hanging plates to vibrate in a cantilevered manner. The vibration itself of the floor panel material is suppressed by the weight of the hanging board and stops quickly, improving soundproofing performance.

Furthermore, according to the inventions of claims (1) and (2), since the lower end of the hanging board does not come into contact with the surface of the subfloor, the floor impact force applied to the floor panel material is not directly transmitted to the subfloor, and
Piping and wiring can be installed in the above space, so piping,
Wiring work is easy.

[Brief explanation of drawings]

FIG. 1 shows a cross-sectional view of a soundproof double floor structure and a floor panel according to an embodiment of the present invention, and FIGS. 2 and 3 are enlarged cross-sectional perspective views of hanging plates in the soundproof floor structure and floor panel, respectively. , FIG. 4 is a sectional view showing a modified example of the soundproof double floor structure and floor panel, FIG. 5 is a plan view showing the distribution of the hanging plates, and FIG. 6 is a sectional view of a comparative example of the conventional structure. , FIG. 7 is a diagram showing the sound insulation performance test results against lightweight floor impact sound of Specific Example 1.2 and Comparative Example. A...Soundproof double floor structure B...Floor panel...Floor base 2...Floor panel material 3...Support legs 4...Floor finishing material 5...Underfloor space 6... Hanging plate 7...Supporting member 8...Sound absorbing material Fig. 5 Fig. 6

Claims (2)

[Claims] (1) A soundproof double floor structure in which a plurality of floor panel materials are placed side by side on a subfloor consisting of a concrete floor slab or the like via a plurality of level-adjustable support legs, and the bottom surface of the floor panel material is A hanging plate is provided that hangs down within a range that does not touch the flooring, and the upper end of the hanging plate is elastically attached to the lower surface of the floor panel material so that the hanging plate can vibrate in a cantilevered manner. Features a soundproof double floor structure. (2) A floor panel comprising a plurality of support legs supporting the floor panel material on the lower surface of the floor panel material, and which is placed side by side on a subfloor made of a concrete floor slab or the like via the support legs. A hanging plate is provided on the lower surface of the floor panel material and hangs down at a height lower than the height of the support legs, and the upper end of the hanging plate is capable of cantilever vibration of the hanging plate on the lower surface of the floor panel material. A floor panel characterized in that it is elastically attached for smoothing.