JP2583624B2 - Soundproof double floor structure and floor panel - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a soundproof double floor structure and a floor panel, and more particularly, to a floor base made of a concrete floor slab or the like in which a plurality of floor panel materials are supported at an appropriate height. The present invention relates to a double floor soundproof structure that is juxtaposed via legs, and a floor panel used for the double floor soundproof structure.

(Prior Art) The double floor or floor panel is mainly used for floors of middle- and high-rise buildings and condominiums, and a plurality of adjustable-level supports for supporting the floor panel material on the lower surface of the floor panel material. A floor panel with legs is juxtaposed on a floor base made of a concrete floor slab or the like via the support legs, and a floor structure and a floor panel in which an underfloor space is formed below the floor panel material. Are known.

And such a double floor structure and floor panels have the advantage that the unevenness of the upper surface of the floor substrate can be absorbed by the supporting legs, so that there is no need for the trouble of smoothing the floor substrate, and the underfloor below the floor panel material. Since the space is continuous in the horizontal direction, it has an advantage that piping and wiring work on the floor base upper surface is easy, so that it is widely used in the above-mentioned middle and high-rise buildings.

(Problems to be Solved by the Invention) However, when a floor impact force acts on the upper surface of the floor panel material in the double floor structure or the floor panel, and the floor panel material vibrates, the air in the underfloor space vibrates. Since the underfloor space is continuous in the horizontal direction, the air vibration in the underfloor space is diffused in the horizontal direction and transmitted to a wide range.

For this reason, in the above-mentioned double floor structure and floor panel,
The floor impact sound generated on the floor is transmitted as a loud impact sound downstairs, and there is a problem that the soundproof performance is not sufficient.

Further, in the above-mentioned double floor structure or floor panel, the support leg usually has an elastic body at a lower end portion to prevent the impact force from the floor panel material from being transmitted to the floor substrate. However, the floor panel material vibrates repeatedly in the vertical direction due to repetition of compression and restoration of the elastic body when an impact force acts on the floor panel material. For this reason, when the floor impact force acts, the vibration of the floor panel material continues for a long time, so that the air vibration in the underfloor space is hardly attenuated, and the floor impact sound is transmitted downstairs.

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

(Means for Solving the Problems) In order to achieve the above object, claims (1) and (2)
According to the invention, by providing a hanging plate capable of cantilever vibration on the lower surface of the floor panel material, the hanging plate partitions the underfloor space to prevent diffusion of air vibration, and the vibration of the hanging plate consumes vibration energy of the floor panel material. It is to let.

Specifically, a solution taken by the invention of claim 1 is a soundproof double in which a plurality of floor panel materials are juxtaposed on a floor base made of a concrete floor slab or the like via a plurality of support legs capable of adjusting the level. For a floor structure, a hanging plate is provided on the lower surface of the floor panel material so as to hang down so as not to abut on the floor substrate, and the upper end portion of the hanging plate cantilevered on the lower surface of the floor panel material. It is configured to be elastically attached so that it can vibrate.

Further, a solution taken by the invention of claim (2) is that a plurality of support legs for supporting the floor panel material are provided on the lower surface of the floor panel material, and the support legs are provided on a floor base made of a concrete floor slab or the like. A hanging plate is provided on a lower surface of the floor panel material, the hanging plate being suspended at a height lower than the height of the support leg, and an upper end of the hanging plate is provided on the floor panel material. The hanging plate is resiliently attached to the lower surface so that the cantilever can be vibrated.

(Function) In the configuration of claim (1), a drooping plate is provided on the lower surface of the floor panel material so as not to abut on the floor substrate, and in the configuration of claim (2), The lower surface of the floor is provided with a hanging plate that hangs at a height lower than the height of the supporting legs, so that the air vibration generated in the underfloor space when a floor impact force acts on the upper surface of the floor panel material due to these configurations. Abuts the hanging plate. For this reason, it is difficult for the air vibration to diffuse horizontally in the underfloor space.

Further, according to the constitutions of claims (1) and (2), the upper end of the hanging plate is elastically attached to the lower surface of the floor panel material so as to make the hanging plate cantileverly vibrate. Vibration energy of the floor panel material generated when a floor impact force acts on the upper surface of the material is consumed for cantilevering the hanging plate.

Further, according to the constitutions 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 up and down, 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 plate and is stopped immediately.

Furthermore, in the structure of claim (1), the hanging plate hangs from the lower surface of the floor panel material in a range that does not come into contact with the floor substrate. In the structure of claim (2), the hanging plate is higher than the height of the support leg. Also, the lower end of the hanging plate does not come into contact with the upper surface of the floor substrate, so that the floor impact force acting on the upper surface of the floor panel material is not transmitted to the floor substrate.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a soundproof double floor structure A and a floor panel B according to one embodiment of the present invention, wherein the soundproof double floor structure A has a plurality of floor panels on a floor base 1 made of a concrete floor slab or the like. Materials 2 are juxtaposed via a plurality of support legs 3, and a floor finishing material 4 made of a wooden floor material, a carpet material or the like is laid on the upper surface of the floor panel material 2. An underfloor space 4 is formed therebetween, and the floor panel B has a support leg 3 provided on the lower surface of the floor panel material 2. Although illustration is omitted, a discard material such as plywood may be laid between the floor panel material 2 and the floor finish material 4.

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

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

In addition, the support leg 3 may not necessarily be integral with the floor panel material 2, and may have a structure in which the floor panel material 2 is supported by the support leg 3 via a steel joist or a wood block. Good.

As a feature of the present embodiment, a strip-shaped hanging plate 6 extending in the horizontal direction is attached to the lower surface of the floor panel material 2 via a support member 7 made of a rubber sheet having an L-shaped cross section at its upper end. I have.

The material of the hanging board 6 is not particularly limited, such as a thick paperboard, a wood board, a metal board, an inorganic board, and a plastic board. In addition to the rubber sheet described above, a cloth sheet, a flexible string, a spring, or the like can be appropriately used as the support member 7, and the lower end of the hanging plate 6 when a floor impact force acts on the floor panel material 2. What is necessary is just to elastically attach a part so that a part may vibrate.

The upper limit of the height of the hanging plate 6 is such that even if an impact force is applied to the floor surface and the floor panel material 2 is flexed, the lower end of the hanging plate 6 is placed on the floor substrate
It is preferable that a space, for example, not less than 10 mm, that does not contact the upper surface of the floor is formed between the lower end of the hanging plate 6 and the floor substrate upper surface 1. When pipes, wiring, and the like are provided on the floor base 1, 20- It is preferable to provide a space of about 50 mm.

Further, the lower limit of the height of the hanging plate 6 is as follows.
It is preferably at least one-third of the height of the underfloor space 6, though it is related to the height of the space 6.

Note that, instead of the above embodiment, a plurality of hanging plates 6 may be sequentially hung up and down via a plurality of support members 7.

In addition, the height dimensions of the hanging plates 6 are different, and the underfloor piping portion is attached with a low height, and the other portion is attached with a high height so as to provide a space between the underfloor equipment and the underfloor equipment. It may be adjusted.

As described above, when the hanging plate 6 is provided on the lower surface of the floor panel member 2 via the support member 7 made of a rubber sheet, the air generated in the underfloor space 5 when the floor impact force acts on the floor panel member 2. Although the vibration tends to spread in the horizontal direction, the air vibration abuts the hanging plate 6 and is prevented from spreading, so that the floor impact sound is prevented from propagating in the horizontal direction. Further, when the air vibration in the underfloor space 5 is to be diffused in the horizontal direction, the air vibration is reflected by the hanging plate 6, but the air vibration is attenuated while consuming the vibration energy every time the air vibration is reflected by the hanging plate 6. The noise in the underfloor space 5 is reduced quickly.
Therefore, if a material that easily reflects sound, such as a metal plate or a hard plastic plate, is used as the material of the hanging plate 6, noise in the underfloor space 5 can be reduced more quickly.

Moreover, since the hanging plate 6 is elastically attached to the lower surface of the floor panel material 2 via the support member 7 made of a rubber sheet, when the floor panel material 2 vibrates due to the floor impact force, it sways in the horizontal direction. Vibrate. In this way, the vibration energy of the floor panel material 2 is consumed, so that the floor impact sound is promptly reduced. For this reason, as the hanging plate 6,
It is preferable that the floor panel material 2 has such a weight that the vibration energy generated in the floor panel material 2 when a floor impact force acts on the floor panel material 2 can be attenuated.
Thickness: 12mm, size: 900mm x 900mm
It is preferable that the total weight of the hanging plate 6 is about 500 g or more.

2 and 3 show a modification of the hanging plate 6 and the supporting member 7. In the case of FIG. 2, the hanging plate 6 and the supporting member 7 are provided with a thin portion 7a extending in the longitudinal direction. The thin sheet portion 7a of the rubber sheet constitutes the support member 7, and the portion of the rubber sheet that is hanging downward below the thin portion 7a forms the hanging plate 6. Make up. In the case of FIG. 3, the support member 7 is a sheet material made of cloth, and the support member 7 includes an L-shaped cross section 7b attached to the lower surface of the floor panel material 2 and a hanging plate 6. Connected on the side.

As described above, if a bendable or flexible member is used as the support member 7, the hanging plate 6 can be bent at the portion of the supporting member 7 and conveyed while being attached to the lower surface of the floor panel material 2. Floor panel material 2 even if 6 is attached
Does not interfere with the transport of

FIG. 4 shows a modified example of the soundproof double floor structure A and the floor panel A according to the above embodiment. In this modified example, the thickness is adjusted by two support members 7 made of a 0.8 mm thick rubber sheet. A 5 mm plywood hanging plate 6 is supported, and sound absorbing materials 8 made of glass wool are adhered to both surfaces of the hanging plate 6.

As the material of the sound absorbing material 8, a porous sound absorbing material is preferable, and 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 fiber, or a foamed plastic plate or the like. Foamed boards such as foamed inorganic boards are preferred.

When the sound absorbing material 8 is attached to the side surface of the hanging plate 6 in this manner,
Since the air vibration is absorbed by the sound absorbing material 8 when the air vibration strikes the hanging plate 6 and is reflected, the noise in the underfloor space 5 is promptly reduced.

Note that the sound absorbing material 8 may be provided only on one side surface of the hanging plate 6 instead of the above modification, or the hanging plate 6 may be provided instead of the above embodiment.
It may be formed of a material having a sound absorbing property.

FIG. 5 shows a dispersed state of the hanging plates 6, in which three hanging plates 6 are arranged in parallel below one square floor panel member 2, and the hanging members 6 hang between adjacent floor panel members 2. Board 6
Are arranged in directions orthogonal to each other. When the hanging plate 6 is arranged in this manner, the air vibration in the underfloor space 5 easily comes into contact with the hanging plate 6, so that the air vibration hardly spreads in the horizontal direction, and the noise is efficiently reduced. When the pipe 9 is provided on the upper surface of the floor substrate 1 as shown in FIG.
The hanging plate 6 may be arranged so as to avoid the pipe 9 or, although not shown, the height of the hanging plate 6 may be reduced.

Hereinafter, a sound insulation performance test of a lightweight floor impact sound performed for evaluating the present invention will be described.

First, the soundproof double floor structure shown in FIG. That is, a floor finishing material 4 made of a wooden floor having a thickness of 12 mm is laid on a floor panel material 2 made of particle board having a thickness of 30 mm, and an underfloor space 5 having a height of 100 mm is provided below the floor panel material 2. Is prepared, a hanging plate 6 made of plywood having a thickness of 12 mm and a height of 80 mm is provided on the lower surface of the floor panel material 2, and two hanging sheets made of a rubber sheet having a thickness of 0.8 mm are provided. It was hung by the support member 7.

Also, as Example 2, a double floor structure similar to that of Example 1 is prepared, and the thickness of the lower surface of the floor panel material 2 is 3.2 mm, and the height from the lower surface of the floor panel material 2 to the lower end of the hanging plate 6 is: An 80 mm hanging plate 6 is suspended by two support members made of a rubber sheet having a thickness of 0.8 mm, and both sides of the hanging plate 6 have a thickness of 12 mm and a density of 64.
kg / m ³ glass wool was stuck.

Further, as a comparative example, a floor structure as shown in FIG. 6, that is, a floor panel material a made of particle board having a thickness of 30 mm and a floor finishing material b made of a wooden floor having a thickness of 12 mm as in the specific example Is prepared, and a double-floor structure in which an underfloor space c having a height of 100 mm is formed below the floor panel material a is prepared as a sound insulating plate e on a floor foundation d, thickness: 25 mm, density: 64 kg
A glass wool mat of / m ³ was laid almost over the entire surface.

The results of the sound insulation performance test for the specific examples 1, 2 and the comparative example are as shown in FIG. 7, and according to the structure of the comparative example, JI
The sound insulation performance of the lightweight floor impact sound by S-A-1418 was L-60, which was a level of concern, whereas the sound insulation performance of Example 1 of the present invention was L-53. The sound insulation of No. 2 is at a level of L-50, which is not bothersome, and the light-weight floor impact sound of the concrete example is about 7 to 7 compared to the comparative example.
It was confirmed that the 10 dB soundproof performance was excellent.

(Effect of the Invention) As described above, according to the soundproof double floor construction according to the invention of claim (1), the hanging plate hanging down to the lower surface of the floor panel material in a range not in contact with the floor substrate is cantilevered. Because it is elastically attached so that it can vibrate, it is difficult for air vibration generated in the underfloor space to spread in the horizontal direction by contacting the hanging plate, and the vibration energy of the floor panel material causes the hanging plate to vibrate in one-sided vibration. As the vibration itself of the floor panel material is consumed and is stopped by the weight of the hanging plate and stopped immediately, the soundproofing performance is improved.

According to the floor panel according to the invention of claim (2),
The underfloor space is provided on the lower surface of the floor panel material so that the hanging plate hanging down at a height lower than the height of the supporting leg is cantileverly vibrated so as to be capable of cantilever vibration. It is difficult for the air vibration generated in the floor to spread in the horizontal direction due to the contact with the hanging plate, the vibration energy of the floor panel material is consumed by cantilevering the hanging plate, and the vibration itself of the floor panel material is also reduced to the weight of the hanging plate As a result, the soundproof performance is improved.

Further, according to the invention of claims (1) and (2), the lower end of the hanging plate does not abut on the upper surface of the floor substrate, so that the floor impact force applied to the floor panel material is not directly transmitted to the floor substrate, and Since piping and wiring can be provided in the space, piping and wiring work is easy.

[Brief description of the drawings]

FIG. 1 is a 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 perspective views of the hanging plate in the soundproof floor structure and the floor panel, respectively. FIG. 4 is a cross-sectional view showing a modified example of the soundproof double floor structure and floor panel, FIG. 5 is a plan view showing a distribution state of the hanging plates, and FIG. 6 is a cross-sectional view of a comparative example as a conventional structure. , Seventh
The figure shows the sound insulation performance test results for light weight floor impact sounds of Examples 1 and 2 and Comparative Example. A: Soundproof double floor structure B: Floor panel 1: Floor base 2: Floor panel material 3: Support legs 4: Floor finishing material 5: Underfloor space 6: Hanging plate 7: Support member 8: Sound absorbing material

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasuro Yoshida 2-3-18 Nakanoshima, Kita-ku, Osaka, Osaka Inside Daiken Kogyo Co., Ltd. (72) Hideki Miyamoto 2-chome, Nakanoshima, Kita-ku, Osaka, Osaka No. 3-18 Daiken Kogyo Co., Ltd.

Claims (2)

(57) [Claims] 1. A soundproof double floor structure in which a plurality of floor panel members are juxtaposed via a plurality of support legs whose levels can be adjusted on a floor base made of a concrete floor slab or the like, wherein a lower surface of the floor panel members is provided. A hanging plate that hangs in a range that does not abut the floor base is provided, and an upper end portion of the hanging plate is elastically attached to a lower surface of the floor panel material so as to make the hanging plate cantileverly vibrate. A soundproof double floor structure characterized by the following. 2. A floor panel comprising a plurality of support legs for supporting the floor panel material on the lower surface of the floor panel material, the floor panels being juxtaposed via the support legs on a floor base made of a concrete floor slab or the like. There is provided a hanging plate hanging at a lower height than the height of the support leg on the lower surface of the floor panel material,
A floor panel wherein an upper end of the hanging plate is elastically attached to a lower surface of the floor panel material so as to make the hanging plate cantileverly vibrate.