JPH03172455A - Soundproof double floor structure - Google Patents

Abstract

PURPOSE:To improve soundproofness by installing a connecting member for a strip-plate shaped connecting plate for connecting the upper surfaces of panel members and a sound absorbing material suspended from the undersurface of the connecting plate, in the gap of the panels and projecting the sound absorbing material under a floor within a range free from the contact with the underfloor ground. CONSTITUTION:A plurality of floor panel members 2 are arranged through an adjustable supporting leg body 3 on an underfloor ground 1, and a gap 6 having a proper width is formed between the floor panels 2. Further, a connecting member 7 having a T-shaped section is formed from a strip plate shaped connecting plate 7a for connecting the upper surfaces of the panel members 2 and a sound absorbing member 7b which is suspended from the undersurface of the connecting plate 7a. The sound absorbing member 7b is positioned in the gap 6 of the connecting member 7, and the projecting quantity of the sound absorbing member 7b is set so as to partition the underfloor space of the undersurface of the floor panel 2 within a range free from the contact with the underfloor ground 1. Accordingly, the construction execution of the floor panel and the sound absorbing member can be carried out easily.

Description

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

(Prior Art) The above-mentioned double floor is mainly used for the floors of medium-to-high-rise buildings and condominiums, and is equipped with a plurality of level-adjustable support legs on the bottom surface of a plurality of floor panels made of plywood, etc. 2. Description of the Related Art A structure called a floor structure in which floor panels for a floor are placed side by side on a subfloor made of a concrete floor slab or the like is known.

This type 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 underfloor space below the floor panel. Since it is continuous in the horizontal direction, it has the advantage that piping and wiring work on the ground surface is easy.

However, if an impact force acts on the top surface of the floor panel shrine and the vibration of the floor panel material causes the air in the underfloor space to vibrate, in the above double floor structure, because the underfloor space is continuous in the horizontal direction, , 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, resulting in a problem that the soundproofing performance is not sufficient.

Therefore, in order to reduce the impact noise in the space under the floor in a double floor structure, a soundproof floor + 14 structure with sound absorbing material laid on the upper surface of the floor surface a, as shown in Figure 6, is proposed. Soundproof floor with “sound absorbing ten” pasted on the blood of the panel shrine +1
~ 1 structure, or ■ As disclosed in Japanese Patent Application Laid-Open No. 63-272853 and shown in Fig. 7, a frame-shaped sound absorbing material +, I' cl is erected on the upper surface of the floor subfloor C, and the sound absorbing material d is used to create a sound absorbing structure under the floor. Proposals include soundproof floor structures that partition spaces.

(Problem to be Solved by the Invention) However, in the soundproof floor structures of (1) and (2) above, it is possible to absorb the impact sound in the underfloor space to a certain extent by the sound absorbing material provided on the upper surface of the floor subfloor or the lower surface of the floor panel material. Otherwise, there is a problem that the soundproofing effect is not sufficient because the impact sound spreads horizontally in the space under the floor.

In addition, the above soundproof floor structure (■) can prevent impact noise from spreading horizontally through the underfloor space, so it has a soundproofing effect. 1
However, since it is necessary to lay a framework-shaped sound absorbing material on the ground surface of the subfloor before installing the floor panel, the laid framework sound absorbing material may interfere with the installation of the floor panel. Therefore, there is a problem that the workability is not good.

Furthermore, in the soundproof floor structures described in Items 1 and 2, the sound-absorbing material is installed on the top surface of the sub-floor, so the sound-absorbing material easily absorbs moisture and moisture from the sub-floor, resulting in a decrease in sound absorption. There's a problem.

The invention is to solve each of the above problems at once, and to obtain a soundproof double floor structure with excellent soundproofing properties that can prevent floor impact noise from spreading horizontally in the space under the floor using a commercial method. The purpose is to

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention arranges a sound absorbing material from above in a gap provided between floor panel materials, and disposes the sound absorbing material from the bottom surface of the floor panel materials. By protruding downward, the sound absorbing material partitions the space under the floor, and by preventing the lower end of the sound absorbing material from coming into contact with the subfloor, moisture absorption from the subfloor is prevented.

Specifically, the solution proposed by the present invention is a soundproofing system in which a plurality of floor panels are placed side by side on a floor made of concrete, floor slabs, etc. via a plurality of support legs with level adjustment openings. Targeting a double floor structure, a gap of [I] is appropriately provided between the floor panels 4 and 2, and a band-shaped connecting plate that connects the upper surfaces of the floor panel materials and the connecting plate. A connecting member with a T-shaped cross section consisting of a band-like sound absorbing material hanging down from the lower surface or the sound absorbing material is positioned in the gap, and the lower end of the sound absorbing material of the connecting member is connected to the flooring. The structure is such that the amount of protrusion is set so as to partition the underfloor space within a range that does not abut the upper surface.

(Function) With the above configuration, the sound absorbing material protrudes below the lower surface of the floor panel material and partitions the above-floor space, so floor impact sound is absorbed by the sound absorbing material and is prevented from spreading in the horizontal direction.

Further, since the lower end of the sound absorbing material does not come into contact with the surface of the subfloor, the sound absorbing material does not absorb moisture or water from the subfloor.

In addition, since the connecting member is provided by positioning the sound absorbing material in the gap uH between the floor panels 1 and 1, the connecting member can be attached after the floor panel shrine has been placed and leveled, and the connecting member can be installed from the gap between the floor panel members. You can insert the sound absorbing material into the gap after checking the piping area and cutting the sound absorbing material so that it does not hit the piping.

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

FIGS. 1 and 2 show a soundproof double floor structure according to an embodiment of the present invention, in which a plurality of floor panel materials 2 are mounted on the upper surface of a subfloor 1 consisting of concrete 1, floor slabs, etc. They are arranged side by side with legs 3 interposed therebetween, and a floor finishing material 5 is laid on the upper surface of the floor panel shrine 2 with a lining material 4 interposed therebetween.

As the floor finishing material 5, a wooden floor material, a carpet material, etc. can be used as appropriate, and as the lining material 4, plywood or the like can be used as appropriate.

As the floor panel shrine 2, a wooden board such as plywood or particle board, a wood cement board, or a metal molded panel can be used. As long as it has enough rigidity to support it, 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 floor and a height-adjustable adjustment pole 1-3b, and rotates an adjustment bolt 3b. This allows the level to be adjusted.

As a feature of this embodiment, the i
+ For example, a grid-like gap 6 of 50 mm Il+ is provided, and step-shaped notches 2a, 2a are provided at the peripheral edge of each floor panel material 2, and these gaps 6 and the opposing notches A space having a T-shaped cross section is formed by the portions 2a, 2a. In the T-shaped space, a connecting member 7 having a T-shaped cross section is arranged, which is composed of a connecting plate 7a in the form of a band and a sound absorbing band +J'7b hanging from the lower surface of the connecting plate 7a. has been done.

In this case, the thickness of the connecting plate 7a is formed to be approximately the same as the height of the notch 2a, and the thickness of the connecting plate 7a is
1] is formed to match the total dimension of rl+ of the two opposing notches 2a and the gap 6, and the connecting plate 7a is fixed with screws or nails to the notch of the floor panel material 2. 2a is fixed on the top surface. By doing this, the floor panel materials 2 are firmly connected by the connecting plate 7a, and the plurality of floor panel materials 2 as a whole form one rigid floor, and the floor panel materials 2 are A flat plane is formed by the upper surface and the upper surface of the connecting plate 7a. Note that the connecting plates 7a may be continuous in the longitudinal direction, or may be disposed intermittently at appropriate intervals.

The sound absorbing material 7b is disposed within the gap 6, and the lower end of the sound absorbing material 7b protrudes downward from the lower surface of the floor panel 2 by an appropriate dimension. In this case, the amount of protrusion of the sound absorbing material 7b should be such that the lower end of the sound absorbing material 7b does not come into contact with the upper surface of the floor base 1 even if the floor surface bends, for example, a gap of about 10 mm, or the lower end of the sound absorbing material 7b and the floor t. It is preferable that the sound absorbing material 7b be formed between the upper surface of the ground, and when the pipe 8 is laid on the upper surface of the floor subfloor 1, a gap should be provided to the extent that the lower end of the sound absorbing material 7b does not touch the pipe 8. preferable. Also, sound absorption +a
The upper limit of the gap between the lower end of the 7b and the upper surface of the subfloor 1 is determined based on the height of the underfloor space, or It is preferable to keep it within one-third of the space height.

The material for the connecting plate 7a is preferably a plate material that has the same degree of rigidity as the floor panel material 2 and can be nailed to the top surface of the floor panel. Specifically, plywood, particle board, etc. may be used. can. Further, the specific dimensions of the connecting plate 7a are: thickness: 12 mm, width: 150 mm,
Length: About 1800 mm is preferable for handling.

The material for the sound absorbing material 7b 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 or foamed inorganic boards are preferred. When using glass wool mat or rock wool mat, 40~1501c
A suitable material has a density of 64 k
Particularly preferred is one with a density of 25 g/m".Also, the specific size of the sound absorption +4'7b depends on the size of the underfloor space, but thickness: 80 mm in 25 mm%.
Preferably, the diameter is about mm.

The connecting plate 7a and the sound absorbing material 7b may be connected to each other with an adhesive, or as shown in FIG. 7a may be screwed and the sound absorbing material 7b may be stapled to the shape material 7c, as long as the sound absorbing material 7b is attached with sufficient strength to prevent it from falling due to the impact force generated on the floor surface.

FIG. 4 shows a modification of the connecting member 7, in which a sound insulating plate 7d having an angular cross section is attached with screws to the lower surface of the connecting plate 7a similar to the above embodiment, and the above-mentioned sound insulating plate 7d is attached to both sides of the sound insulating plate 7d. A sound absorbing material 70b similar to that of the embodiment is laminated with a diluent.

FIG. 5 shows a modification of the soundproof double floor (b) structure according to the above embodiment.

In this modification, the notch 2a is not provided on the peripheral edge of the floor panel 2, and the connecting plate 7a is connected to the floor panel 2.
It is placed on the peripheral edge of the upper surface and fixed with screws or adhesive.

Further, in the center of the upper surface of the floor panel material 2, joists 9 of approximately the same thickness as the connecting plate 7a of the connecting member 7 are arranged at appropriate intervals, and on the upper surfaces of these connecting members 7 and the joists 9, wooden flooring is placed. The finishing material 5 is directly laid, and the floorboards are supported by joists without using the lining material 4. In this way,
A space is formed on the lower surface of the floor finishing material 5 to improve ventilation and reduce 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 FIG. 1 was prepared. In this case, the connecting member has a thickness of 12 mm,
Ill: A chain made of 150 mm plywood] 1 Thickness: 25 mm, height: 80 mm, on the lower surface of the connecting plate 7a,
A sound-absorbing board 7b made of a glass wool mat with a density of 641 cg/m+3 was prepared and placed continuously in the gaps between the floor panels 2 in the longitudinal and lateral directions.

Next, as a comparative example, a soundproof floor structure shown in FIG. 6 was provided. In this case, the thickness of the sound absorbing material is 25 m.
Using a glass wool mat with a density of +641 cg/m'', the sound-absorbing material was laid almost entirely on the upper surface of the subfloor a.

The results of the sound insulation performance test I for specific examples and comparative examples are shown in the 8th section.
As shown in the figure, according to the structure of the comparative example, JIS-
The sound insulation performance of lightweight floor impact sound by A-1418 is L-60
However, while it was at a slightly worrisome level,
The sound insulation performance of the specific example of the present invention is at an unnoticeable level of L-53, and the sound insulation performance of the specific example is approximately 7 dB superior to that of the comparative example against lightweight floor impact noise. confirmed.

(Effects of the Invention) 2 As explained above, according to the soundproof double floor structure according to the present invention, the sound absorbing member of the connecting member protrudes so as to partition the underfloor space within a range where the lower end thereof does not come into contact with the floor surface. Since the protrusion is set to a certain amount, floor impact sound is absorbed by the sound absorbing material and does not diffuse in the direction of water.Also, the sound absorbing material does not absorb moisture or water from the subfloor, so it has excellent soundproofing properties. .

Furthermore, since the connecting member is provided by placing the sound-absorbing material in the gap between the floor panel materials, the connecting member can be installed after the floor panel material is installed, and the sound-absorbing material can be cut before it hits the piping. Since it can be inserted into the gap between floor panel materials, construction of the floor panel materials and sound absorbing materials is extremely easy.

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

[Brief explanation of the drawing]

1 and 2 show a soundproof double floor structure which is an embodiment of the present invention, FIG. 1 is a sectional view, FIG. 2 is a perspective view of the connecting member, and FIGS. 3 and 4 are 5 is a sectional view showing a modification of the soundproof double floor structure described in 1. FIGS. 6 and 7 are sectional views of a conventional soundproof double floor structure, respectively. , FIG. 8 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... Thread material 5... Floor finishing material 6... Gap 7... Connecting member 7a... Connecting plate 7b...Sound absorbing material 4 408-

Claims (1)

[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 space between the floor panel materials is A space having an approximately T-shaped cross section is provided with a gap of an appropriate width between the floor panels, and is composed of a band-like connecting plate that connects the upper surfaces of the floor panel members and a band-like sound absorbing material that hangs down from the lower surface of the connecting plate. A connecting member is provided with its sound absorbing material positioned in the gap, and the sound absorbing material of the connecting member is set to a protruding amount so as to partition the underfloor space within a range where the lower end thereof does not come into contact with the subfloor surface. Soundproof double floor structure.