JPH03172454A - Soundproof double floor structure - Google Patents

Abstract

PURPOSE:To improve soundproofness by installing a connecting member for a strip- plate shaped rigid connecting plate which is fixedly installed on the upper surface of a panel material and a sound insulating plate suspended from the undersurface of the rigid connecting plate and projecting a sound insulating material over a prescribed fractional height of the underfloor space but not to contact the ground. CONSTITUTION:A plurality of floor panel members 2 are arranged through an adjustable supporting leg body 3 on an underfloor ground 1, and an underfloor space 5 is formed under the panel member 2, and a gap 6 is formed between the floor panels 2. Further, a connecting member 7 having a T-figure-shaped section is formed from a strip plate shaped rigid connecting plate 7a which is fixed on the upper surface of the panel members 2 so as to connect the panel members 2 with each other and a sound insulating plate 7b which is vertically suspended from the undersurface of the rigid connecting plate 7a. As for the connecting member 7, a sound insulating plate 7b is positioned in the gap 6, and the sound insulating member is projected from the undersurface of the floor panel 2, and the projection quantity is set over 1/3 of the height of the underfloor space so that the lower edge of the sound insulating member is installed so as not to contact the underfloor grounding surface. Accordingly, construction execution can be carried out easily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a soundproof double floor structure, and more specifically, to a concrete floor structure.
1.Regarding an improvement in the soundproof structure of a double floor in which a plurality of floor panel materials are arranged side by side on a subfloor consisting of a floor slab or the like via support legs of appropriate heights.

(Prior Art) The above-mentioned double floor is mainly used for the floors of medium-to-high-rise buildings and condominiums, and is made of a plurality of floor panels made of plywood etc. 6
A so-called floor structure is known in which floor panels made of 11 parts are placed side by side on a subfloor made of concrete 1, a floor slab, etc.

This kind of double floor structure has the advantage that unevenness on the surface of the subfloor can be absorbed by the level-adjustable support legs, so there is no need to smooth the subfloor, and there is no need to smooth the subfloor, and there is no space under the floor below the floor panel material. Since the pipes are 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 shrine and the vibration of the floor panel shrine causes the air in the underfloor space to vibrate,
In the double-floor structure described in ``2,'' the underfloor space is continuous in the horizontal direction, so air vibrations in the underfloor space are spread horizontally and transmitted over a wide area. For this reason, in the above-mentioned double floor structure, 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 not sufficient.

In addition, in the above-mentioned double floor structure, since the floor panel shrine is supported by the support legs, if a floor impact force is applied to the upper surface of the floor panel between the support legs, the floor panel material will bend significantly. Because of the vibration, there is also the problem that floor impact noise becomes even louder impact noise and is transmitted downstairs.

In view of the above, an object of the present invention is to enable a soundproof double floor structure with excellent soundproofing properties to be obtained by a simple method.

(Means for Solving the Problem) In order to achieve the above-mentioned objective 1, the present invention provides sound insulation IJyr in the form of rigid strips in the gaps between the floor panels so that the entire floor panel shrine is covered with The sound insulating board provides rigidity, and by projecting the sound insulating board a predetermined amount downward from the lower surface of the floor panel material, the underfloor space is partitioned by the sound insulating board.

Specifically, the solution proposed by the present invention is that a plurality of floor panel materials are arranged side by side on a subfloor consisting of a concrete floor slab': 5 via a plurality of support legs whose levels are adjustable, and the lower part of the floor panel shrine is The object is a soundproof double floor structure in which an under-floor space is formed between the floor panels, and a gap of 1] is appropriately provided between the above-mentioned floor panel shrines, and the floor panel shrines are arranged so that the upper surfaces of the floor panel shrines are connected. A connection part with a substantially T-shaped cross section consisting of a rigid band-like connecting plate fixed on the upper surface and a rigid band-like sound insulating plate hanging from the lower surface of the connecting plate. A sound insulating board is positioned, and the sound insulating plate of the connecting member is located at the bottom of the sound insulating material or above the protrusion amount from the lower surface of the floor panel material or one-third or more of the height of the underfloor space. The configuration is such that it does not come into contact with the ground surface of the floor subfloor.

(Function) With the above configuration, the amount of protrusion of the sound insulating board from the lower surface of the floor panel material is one-third or more of the height of the underfloor space, so the diffusion of floor impact sound is prevented by the sound insulating board, so the underfloor space is It is difficult to spread horizontally.

Furthermore, since the lower end of the sound insulating plate does not contact the surface of the subfloor, impact force applied to the floor panel material is not directly transmitted to the subfloor.

In addition, the floor panel has a cross section approximately T consisting of a rigid band-like connecting plate and a rigid band-like sound insulating plate hanging from the connecting plate.
Because they are connected by a letter-shaped connecting member, the rigid sound insulating board acts as a reinforcing rib for the floor panel shrine, increasing the overall rigidity of the installed floor panel shrine. Even if a floor impact force is applied to the upper surface of a panel shrine, bending vibration is unlikely to occur in the floor panel material.

Generally speaking, since the connecting member is provided with its sound insulating plate positioned in the gap between the floor panel materials, it is possible to simultaneously partition the underfloor space and stiffen the floor panel materials as described above. At the same time, the connecting member can be removed after the floor panel shrine is placed and leveled.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a soundproof double floor structure according to an embodiment of the present invention.
A plurality of floor panel materials 2 or a plurality of support legs B are arranged in parallel on the upper surface of the floor panel 4A2, and a floor finish 4 made of wood flooring, carpet + A, etc. is laid on the upper surface of the floor panel 4A2, and a floor base material is A floor space 5 is formed between 1 and the floor panel shrine 2.

Note that although not shown in the drawings, a sakuhari shrine made of plywood or the like may be installed between the floor panel shrine 2 and the floor finishing shrine 4.

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

The support leg body 3 includes a truncated conical elastic body 3a placed on the upper surface of the flooring and a height-adjustable adjustment bolt 3b.
The height can be adjusted within a range of 100 to 1.50 mm by rotating the adjustment bolt 3b.

As a feature of this embodiment, the floor panel system has two comrades.
For example, a grid-like gap 6 of 50 m m i] is provided, and step-like cutouts 2a, 2a are provided at the peripheral edge of each floor panel shrine 2, and these gaps 6 and the opposing A space having a T-shaped cross section is formed by the notches 2a, 2a.

1. The T-shaped space has a roughly T-shaped cross section, consisting of a rigid band-shaped connecting plate 7a and a rigid band-shaped sound insulating plate 7b hanging from the lower surface of the connecting plate 7a. Connecting part shrine 7
is installed.

In this case, the thickness of the connecting plate 7a is formed to be approximately the same as the height of the thick portion 2a, and the thickness of the connecting plate 7a is approximately the same as the height of the thick portion 2a.
] is formed to match the total dimension of the two opposing notches 2a and the gap 6, and the connection [7
A is fixed to the upper surface of the glue portion 2a of the floor panel 2 with screws II or nails 11. By doing this, the floor panel shrines 2 are firmly connected by the connecting plate 7a, and the floor panel shrines 2 of the number of stages are made into one rigid floor as a whole. A flat plane is formed by the upper surface and the upper surface of the connecting plate 7a.

The sound insulating board 7b is arranged within the gap 6, and the lower end of the sound insulating board 7b protrudes from the lower surface of the floor panel 2 by a certain angle. In this case J, the amount of protrusion of the sound insulating plate 6a is preferably set as described above.

In other words, the upper limit of the amount of protrusion is such that even if the floor surface bends, the edge of the sound insulating board 7b does not come into contact with the top surface of the subfloor 1, such as a gap of about 1Q mm between the bottom end of the sound insulating board 7b and the top surface of the subfloor 1. It is preferable that the pipes 7 be formed between the sound insulating plates 7 and 7.
It is preferable to provide a gap to the extent that the lower end of b does not touch the pipe 7.

Moreover, it is preferable that the lower limit of the amount of protrusion is one-third or more of the height of the underfloor space. The reason is as above. That is, FIG. 4 shows that the underfloor space 5 is 1;
In the case of OOm m, the edge of the sound insulation board 7b and the flooring]
This figure shows the relationship between the clearance, which is the distance from the top surface, and the number of lightweight floor impact noises.As is clear from the figure, as the clearance decreases from 1100 rri to 67 mm, the L number also increases. This is because the clearance decreases rapidly, and the clearance is reduced to 67 m.
This is because if it is smaller than m, the number of L will be 55 or less.

Furthermore, the reason why the L number becomes 55 or less when the clearance is made smaller than 67 mm is interpreted as follows. In other words, if one-third or more of the height of the underfloor space 5 is partitioned by the sound insulation board 7b, even if a floor impact force is applied to the upper surface of the floor panel material 2, the floor impact sound will be absorbed by the sound insulation board. This is because it becomes difficult for the underfloor space 5 to spread horizontally as it is blocked by the underfloor space 7b.

The material for the connecting plate 7a and the sound insulating plate 7b is preferably a material that has enough rigidity to reduce bending deformation of the side edge with the floor panel shrine 2 and that can be nailed to the top surface of the floor panel. Specifically, plywood, particle board, a plastic mold with screw holes, a metal mold, etc. can be used. In this case, the materials of the connecting plate 7a and the sound insulating plate 7b may be the same or different. Further, the specific size of the connecting plate 7a is as follows: thickness: 12 mm, III: ] 550 m
m Length: Approximately 1800 mm, which is preferable for handling, and regarding the specific size of the sound insulating plate 7b, Thickness: 15 m rn
, Height: 80 mm, Length: about 1800 mm are preferable for soundproofing.

The connecting plate 7a and the sound insulating plate 7b may be connected together by using adhesive, or by using a ■-shaped material made of synthetic resin, and attaching the ■-shaped plate 70 to the connecting plate 7a. It is also possible to fasten the sound insulation 1i7b to the bottom surface with screws and sandwich the sound insulation 1i7b between the ■-shaped tiA7c and staple it.
- There is a need to be kicked. Note that when the connecting plate 7a and the sound insulating plate 7b are made of the same material, they may be integrally molded.

FIG. 3 shows a modification of the soundproof double floor structure according to the above embodiment.

In this modification, the notch 2a is not provided at the peripheral edge of the floor panel material 2, and the connecting plate 7a is connected to the floor panel material 2.
It is fixed with screws or adhesive while being placed on the periphery of the two sides.

In addition, in the center of the upper surface of the floor panel material 2, joists 8 of approximately the same thickness as the connecting plate 7a of the connecting member 7 are juxtaposed at appropriate intervals, and on the upper surfaces of these connecting members 7 and joists 8, wooden flooring The finishing material 4 is directly laid, and the floorboards are supported by joists without using a sahari. In this way, a space is formed on the upper surface of the floor finishing shed 4, improving ventilation and reducing condensation under the floor.

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, a soundproof double floor structure shown in FIGS. 1 and 2 was prepared. That is, thickness = 30mm
A floor finishing shrine 4 made of a wooden floor with a thickness of 12 mm is laid on the floor panel shrine 2 made of particle board, and an underfloor space 5 with a height of 100 mm is formed on the side of the floor panel shrine 2. It has a multi-layered floor structure, and the connecting member 7 is a connecting plate 7a made of plywood with a thickness of 12 mm SrlJ: 150 mrn, with a sound insulating plate 7b made of plywood with a thickness of 15 mm adhered to the lower surface of the connecting plate 7a, and a floor panel material. The protrusion m of the sound insulating plate 7b from the lower surface of 2 was set to 6 nm.

Next, as a comparative example, a floor structure as shown in Fig. 5, that is, similar to the specific example, consists of a wooden floor with a thickness of +12 mm on a floor panel material a made of particle board with a thickness of 30 mm. A double floor structure is prepared in which a floor finishing material is laid and a floor space C with a height of 100 mm is formed below the floor panel material 2, and a sound insulating board e is placed on the subfloor d:
A glass wool mat having a size of 25 mm and a density of 64 kg/m'' was laid over almost the entire surface.

The results of the sound insulation performance test 2 for the specific example and comparative example are as shown in Figure 6, and according to the structure of the comparative example, J
The sound insulation performance of lightweight floor impact sound according to IS-A-1,418 was L-60, which was a slightly worrisome level, whereas in the specific example of the present invention, it was L55, a level that was not so noticeable. It was confirmed that the specific example had superior soundproofing performance by about 5 clB compared to the comparative example.

(Effects of the Invention) As explained above, according to the soundproof double floor structure according to the present invention, the amount of protrusion of the soundproof board from the lower surface of the floor panel material is set to be one-third or more of the height of the underfloor space. Because it has been
Floor impact noise is blocked by the sound insulating board and difficult to diffuse horizontally through the underfloor space, and the floor panel materials are connected by rigid connecting members with a roughly T-shaped cross section, making the whole structure rigid. Even if a floor impact force is applied to the upper surface of the floor panel shrine, bending vibration is unlikely to occur in the floor panel shrine, so the soundproofing properties are significantly improved.

In addition, since the connecting member is provided by positioning the sound insulating board in the gap between the floor panel materials, it is possible to partition the underfloor space and increase the rigidity of the floor panel shrine at the same time. Since the connecting members can be removed after installation, installation of the floor panel system and sound insulation board is extremely easy.

Therefore, according to the present invention, a soundproof double floor structure with excellent soundproofing properties can be obtained using a commercially available construction method.

[Brief explanation of the drawing]

Figures 1 and 2 show a soundproof double floor structure according to an embodiment of the present invention, where Figure 1 is a sectional view, Figure 2 is a perspective view, and Figure 3 is a modification of the above soundproof double floor structure. Figure 4 is a diagram showing the relationship between the clearance and the number of lightweight floor impact noises.
FIG. 5 is a sectional view of a comparative example as a conventional structure, and FIG. 6 is a diagram showing the results of a sound insulation performance test against lightweight floor impact noise of a specific example and a comparative example. 1... Floor base 2... Floor panel material 3... Support legs 4 4... Floor finishing shrine 5... Above-floor space 6... Gap 7... Connecting part shrine 7a... Connection Plate 7b...Sound insulating board 5 bottom = whole company b = ≧ carving ・ : ・ : ・ ・ m,. , -1('l (Y'size[F][\[\[\'ml
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Claims (1)

[Claims] (1) A soundproof double layer consisting of a plurality of floor panel materials 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 an underfloor space formed below the floor panel materials. In the floor structure, a gap of an appropriate width is provided between the floor panel materials, and a strip-like rigid connection is fixed to the upper surface of the floor panel material so as to connect the upper surfaces of the floor panel materials. A connecting member having a substantially T-shaped cross section and consisting of a plate and a band-like rigid sound insulating plate hanging from the lower surface of the connecting plate is provided with the sound insulating plate positioned in the gap, and the sound insulating material of the connecting member is the protrusion from the bottom surface of the above floor panel material,
A soundproof double floor structure characterized in that the amount of protrusion is set to be one-third or more of the height of the underfloor space so that the lower end of the sound insulating material does not come into contact with the ground surface of the underfloor.