JP4457749B2 - Soundproof double floor - Google Patents

Description

  The present invention relates to a soundproof double floor excellent in sound insulation performance of heavy floor impact sound, which is mainly provided in an apartment house or a detached house.

  ALC floor slabs are sometimes used for the construction of the second floor of a lightweight steel framed house, but the sound insulation performance of the heavy floor impact sound is often about LH-65, and it cannot be said that the sound insulation performance is sufficiently satisfactory. It was.

  As a measure for improving the sound insulation performance, for example, there is a deck slab method in which cast-in-place concrete is placed on a steel deck and integrated. However, since the deck slab method requires concrete placement on site, the construction was large and the quality was difficult to stabilize. In addition, there is a problem that the floor portion is heavy and the site is easily soiled.

  As another countermeasure, for example, as disclosed in Patent Documents 1 to 3, a soundproof double floor in which a floor member is installed on an ALC floor slab via a vibration isolation support leg is known. If such a dry type soundproof double floor is adopted, concrete placement on site can be abolished and the above problems can be solved.

JP-A-6-33587 JP-A-6-66015 JP 2001-107548 A

  However, when constructing soundproof double floors based on ALC floor slabs as described above, there are many cases where the sound insulation performance cannot be improved sufficiently, and in particular, the sound insulation performance against heavy floor impact sound cannot be expected. There was room for improvement in structure.

  In addition, the soundproof double floor has a problem in that the ceiling height in the room is lowered and a step is generated between the floor and the general floor as much as the floor finish surface is increased.

  The present invention solves the above-mentioned problems, and in the soundproof double floor provided with a base in which a plurality of ALC floor slabs are arranged, particularly improves the sound insulation performance against heavy floor impact sound and suppresses the height of the floor finish surface. For the purpose.

In order to solve the above problems, the present invention provides a soundproof double floor in which a floor member having a multilayer structure is installed on a base via vibration-proof support legs, and the base includes a plurality of ALC floor slabs arranged side by side. The floor member comprises a particle board layer in which a plurality of particle boards are laid, and a hard fiber board layer laminated on the particle board layer, and the hard fiber board layer is formed of the particle board layer. A plurality of hard fiberboards are fixed across adjacent particleboards so that the particleboards are connected to each other, and the ALC floor slab is placed in a state of being dropped between the floor beams. On the anti-vibration support leg disposed above, the floor member is installed with a clearance allowing vibration between the floor flange and the upper flange of the floor beam, and the upper surface of the floor member is attached to the floor beam. Up And wherein substantially that as aligned at the same height level as the top surface of the floor member of the general floor placed on the lunge.

  Specifically, the particle board layer has a thickness of 20 to 30 mm, and the hard fiberboard layer has a thickness of 5 to 15 mm.

  Further, another particle board layer formed by laying a plurality of particle boards is laminated on the upper side of the hard fiberboard layer, or a plurality of vibration damping sheets are laid on the upper side of the other particle board layers. The damping sheet layer is laminated. Furthermore, a damping sheet layer formed by laying a plurality of damping sheets is laminated on the upper side of the hard fiberboard layer.

The thickness of the vibration damping sheet layer is 5 to 15 mm. Further, the anti-vibration support leg includes an anti-vibration rubber having a hardness of 50 to 70 degrees .

  In the soundproof double floor of the present invention, even if the base is formed by arranging a plurality of ALC floor slabs, the sound insulation performance can be sufficiently improved, and in particular, the sound insulation performance against heavy floor impact sound can be enhanced.

  In addition, by installing floor members on the ALC slab dropped between the floor beams, despite the construction of soundproof double floors, the floor finish surface height is kept low, and the ceiling height is sufficient Can be ensured, and a step difference from the general floor can be eliminated. In addition, by ensuring a gap that allows vibration between the floor member and the floor beam, the height of the floor finish surface can be suppressed without impairing the sound insulation performance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a reference example of the present invention will be described. A soundproof double floor according to this reference example is employed as a second floor of a lightweight steel house or a floor of an apartment house, for example, as shown in FIGS. The floor member (3) having a multi-layer structure is installed on the base (1) via a plurality of anti-vibration support legs (2) (2).

  The base (1) is constructed by laying a plurality of ALC floor slabs (5), (5)... On a floor beam (not shown). On the surface side of the base (1), the ALC floor slabs (5), (5),. Floor slabs (5) (5) are fixed across the space. The thickness of the substrate (1), that is, the thickness of the ALC floor slabs (5), (5),... Is about 100 mm, and the thickness of the particle boards (6), (6), is about 15 mm.

  The anti-vibration support leg (2) is composed of, for example, a substantially rectangular support plate (10) and a base (11) attached to the approximate center of the support plate (10). The base (11) is made of anti-vibration rubber and has a hardness of 50 to 70 degrees, specifically about 65 degrees. The height of the anti-vibration support leg (2) is set to about 25 mm.

  The floor member (3) includes, for example, a first particle board layer (20), a hard fiber board layer (21) laminated on the first particle board layer (20), and the hard fiber board layer (21). A second particle board layer (22) laminated on the upper side of the second particle board layer, a vibration damping sheet layer (23) laminated on the second particle board layer (22), and an upper side of the vibration damping sheet layer (23). And a flooring layer (24) laminated thereon.

  The first particle board layer (20) is formed by laying a plurality of particle boards (25) (25) on the support plates (10), (10) of the anti-vibration support legs (2), (2). The thickness of the first particle board layer (20) is set to 20 to 30 mm, specifically about 25 mm.

  The hard fiberboard layer (21) is formed by laying a plurality of hard fiberboards (26), (26)... Generally called “hardboard” on the first particle board layer (20). The plurality of hard fiber boards (26), (26) are connected to each other so that the particle boards (25), (25), ... of the first particle board layer (20) are connected to each other and integrated. ) (25) ... It is fixed across. The thickness of the hard fiberboard layer (21) is set to 5 to 15 mm, specifically about 7 mm.

  The second particle board layer (22) is formed by laying a plurality of particle boards (27), (27)... On the hard fiber board layer (21). The thickness of the second particle board layer (22) is set to 20 to 30 mm, specifically about 25 mm.

  The damping sheet layer (23) is formed by, for example, laying a plurality of asphalt damping sheets (28), (28),... On the second particle board layer (22). The thickness of the vibration damping sheet layer (23) is set to 5 to 15 mm, specifically about 6 mm.

  The flooring layer (24) is formed by laying flooring materials (29) (29) on the vibration damping sheet layer (23). The thickness of the flooring layer (24) is set to 5 to 20 mm, specifically about 12 mm.

  When constructing a soundproof double floor having the above structure, a plurality of anti-vibration support legs (2) (2) are arranged on a base (1) in which particle boards (6) (6) are laid on the surface side. As shown in FIG. 3 and FIG. 4, particle boards (25), (25), etc. are sequentially laid on the support plates (10), (10) of the anti-vibration support legs (2), (2),. A first particle board layer (20) is formed. Each particle board (25) (25) is laid so that its four corners are placed on the support plates (10) (10).

  Then, as shown in FIG. 2, a plurality of hard fiber boards (26), (26)... Are laid across the adjacent particle boards (25), (25) in the first particle board layer (20). The hard fiberboard layer (21) is formed by fixing to the adjacent particle boards (25) and (25) with a fixing tool such as a nail. As a result, the particle boards (25), (25),... Of the first particle board layer (20) are connected and integrated with each other, and the rigidity thereof can be increased.

  Subsequently, a plurality of particle boards (27) (27) are laid on the hard fiber board layer (21) to form a second particle board layer (22) and the second particle board layer (22). A plurality of damping sheets (28) and (28) are laid on top to form a damping sheet layer (23). Then, a plurality of flooring materials (29), (29),... Are spread on the vibration damping sheet layer (23) to form the flooring layer (24). Finally, a gap (31) is formed between the floor member (3) and the wall (30) to allow the vibration of the floor member (3) so as not to interfere with the sound insulation performance. Since the gap (31) is hidden, the baseboard (32) is attached to the wall (30).

  In such a soundproof double floor, the sound insulation performance against the heavy floor impact sound can be improved by about 10 dB, and the sound insulation grade can be improved from LH65 to LH55 and improved by two ranks.

As the structure of the floor member (35), for example, as shown in FIG. 5, the upper second particle board layer (22) is abolished and the damping sheet layer (23) is disposed on the hard fiberboard layer (21). May be laminated directly. The other structure of the soundproof double floor shown in FIG. 5 is the same as that of the reference example described above, and members having the same functions as those of the reference example are given the same reference numerals.

In the soundproof double floor of the above reference example , the floor finish surface becomes high, the ceiling height in the room may become low, or a step may occur between the surrounding general floors, in order to improve this Furthermore, the soundproof double floor according to the embodiment of the present invention has a structure shown in FIG.

  That is, the ALC floor slabs (5), (5),... Are placed in a state of being dropped between the floor beams (40) (40). Specifically, L-shaped support plates (42), (42) are attached to the webs of the floor beams (40), (40),. The ALC floor slab (5) is placed on the plates (42) and (42). Then, the ALC floor slab (5) is fixed to the support plates (42) and (42) with bolts (43) (43)... And mounting brackets (44) (44). ing.

  The anti-vibration support legs (45), (45) are arranged on the ALC floor slabs (5), (5), which have been dropped between the floor beams (40), (40) in this way, and these anti-vibration support legs ( 45) (45) ... The floor member (3) is installed on the top. Between this floor member (3) and the upper flange of the floor beam (40) (40) ..., a clearance (46) that allows the vibration of the floor member (3) is secured, which impedes the sound insulation performance. It is supposed not to come. Further, the upper surface of the floor member (3) is arranged at substantially the same height level as the upper surface of the floor member (50) of the general floor placed on the upper surfaces of the floor beams (40) (40). Therefore, it is possible to keep the floor finish surface low while maintaining good sound insulation performance, and to eliminate problems such as a low ceiling height and a level difference between the floor and the general floor.

Instead of the floor member (3), a floor member (35) in which the second particle board layer (22) is eliminated may be used so that the upper surface thereof is aligned with the upper surface of the floor member (50) of the general floor. good. Other configurations are the same as the reference example, members having the same functions as those in the above reference example are denoted by the same reference numerals.

  The sound insulation performance against the heavy floor impact sound of the soundproof double floor of the present invention was confirmed by experiments. In this experiment, as shown in FIG. 7, two examples assuming the soundproof double floor of the present invention, three comparative examples, and a structure composed only of an ALC floor slab without using a vibrationproof double floor are prepared. These were compared.

  The soundproof double floor of Comparative Example 1 supports the floor member by a vibration-proof support leg having a rubber hardness of 65 degrees. The floor member includes a first particle board layer, a vibration damping sheet layer (6 mm), and a second particle board layer. The vibration damping sheet layer (10 mm) and the flooring layer are laminated in order from the bottom.

  The soundproof double floor of Comparative Example 2 has a structure in which the second particle board layer and the vibration damping sheet layer are eliminated from the vibrationproof double floor of Comparative Example 1.

  The anti-vibration double floor of Comparative Example 3 supports the floor member by an anti-vibration support leg having a rubber hardness of 40 degrees. The floor member includes the first particle board layer, the hard fiber board layer, the second particle board layer, the damping member. A vibration sheet layer and a flooring layer are laminated in order from the bottom.

  Examples 1 and 2 are soundproof double floors according to the present invention. In Example 1, a floor member is supported by a vibration-proof support leg having a rubber hardness of 65 degrees, and the floor member includes a first particle board layer, a hard fiber board layer, a second particle board layer, a vibration damping sheet layer, and a flooring layer. Are stacked in order from the bottom. In Example 2, the second particle board layer is eliminated from the vibration-proof double floor of Example 1.

  When each of these examples, comparative examples, and ALC floor slabs were subjected to measurement of sound insulation performance of heavy floor impact sound, as shown in FIG. 7, the sound insulation grade was in the vicinity of LH-55. Example 1 and 2.

  However, in Comparative Example 3, the vibration-proof rubber hardness is low, and there is a feeling that the vibration-proof double floor sinks when walking, and it cannot be put into practical use.

  On the other hand, in Comparative Examples 1 and 2 and the ALC floor slab, it was not possible to achieve a sound insulation grade of around LH-55. First, the difference between Comparative Example 1 and Example 1 is whether a vibration damping sheet layer or a hard fiberboard layer is laminated on the first particle board layer. The difference between Comparative Example 2 and Example 2 is whether or not there is a hard fiberboard layer.

  Since the damping sheet layer is only placed on the first particle board layer, the rigidity is not increased, but the hard fiberboard layer is integrated by connecting a plurality of particle boards in the first particle board layer. As described above, since the first particle board layer is fixed with a fixing tool such as a nail, the first and second embodiments have higher rigidity than the first and second comparative examples. Therefore, it can be seen that this difference in rigidity greatly affects the sound insulation performance.

Further, in Comparative Example 1, the weight per 1 m ² is about 91 kg, while in Example 1, it is about 73 kg, and in Example 2, it is about 53 kg. Therefore, in Examples 1 and 2, the sound insulation performance is improved while realizing weight reduction.

  Specifically, in Examples 1 and 2, as shown in FIG. 8, the sound insulation grade is in the vicinity of LH-55, and the sound insulation grade is improved by two ranks compared to the case of only the ALC floor slab, and against the heavy floor impact sound. The sound insulation performance is improved by about 10 dB.

It is a longitudinal cross-sectional view of the soundproof double floor which concerns on the reference example of this invention. It is the fracture | rupture perspective view similarly. It is a perspective view which shows the construction procedure of a floor member. It is a perspective view which shows the construction procedure of a floor member. It is a longitudinal cross-sectional view of the soundproof double floor which concerns on another reference example . It is a longitudinal section of a soundproof double floor concerning an embodiment of this invention . It is a figure which shows the result of the sound-insulation performance measurement with respect to the heavy floor impact sound of a soundproof double floor. It is a figure which shows the result (Examples 1 and 3, ALC floor slab) of the sound insulation performance measurement with respect to the heavy floor impact sound of a soundproof double floor.

Explanation of symbols

(1) Base
(2) Anti-vibration support legs
(3) (35) Floor material
(5) ALC floor slab
(6) (25) (27) Particleboard
(20) First particle board layer
(21) Hard fiberboard layer
(22) Second particle board layer
(23) Damping sheet layer
(26) Hard fiberboard
(28) Vibration control sheet
(40) Floor beam
(46) Gap
(50) General floor materials

Claims (8)

A soundproof double floor in which a multi-layered floor member is installed on a base via vibration-proof support legs, wherein the base includes a plurality of ALC floor slabs, and the floor member includes a plurality of particle boards. And a hard fiberboard layer laminated on the particleboard layer, and the hard fiberboard layer includes a plurality of particleboard layers so that the particleboard layers are connected to each other. A hard fiberboard is fixed across adjacent particle boards , and the ALC floor slab is placed in a state where it is dropped between floor beams, on the vibration-proofing support leg placed on the ALC floor slab, The floor member is installed with a clearance allowing vibration between the upper flange of the floor beam and the upper surface of the floor member is mounted on the upper flange of the floor beam. Top Soundproofing double bed, characterized in that the align substantially at the same height level. The soundproof double floor according to claim 1, wherein the particle board layer has a thickness of 20 to 30 mm. The soundproof double floor according to claim 1 or 2, wherein the thickness of the hard fiberboard layer is 5 to 15 mm. The soundproof double floor according to any one of claims 1 to 3, wherein another particleboard layer formed by laying a plurality of particleboards is laminated on the upper side of the hard fiberboard layer. The soundproof double floor according to claim 4, wherein a vibration damping sheet layer formed by spreading a plurality of vibration damping sheets is laminated on the upper side of the other particle board layer. The soundproof double floor according to any one of claims 1 to 3, wherein a vibration damping sheet layer formed by spreading a plurality of vibration damping sheets is laminated on the upper side of the hard fiberboard layer. The soundproof double floor according to claim 5 or 6, wherein the vibration damping sheet layer has a thickness of 5 to 15 mm. The soundproof double floor according to any one of claims 1 to 7, wherein the vibration-proof support leg includes a vibration-proof rubber having a hardness of 50 to 70 degrees.

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