JP2583621B2 - Soundproof double floor structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a soundproof double floor structure, and more specifically, a plurality of floor panel members are provided on a floor base made of a concrete floor slab or the like with supporting legs having appropriate heights. The present invention relates to an improvement of a soundproof structure of a double floor which is juxtaposed with each other.

(Prior Art) The double floor is mainly used for floors of middle- and high-rise buildings and condominiums, and is provided with a plurality of support legs capable of adjusting the level on the lower surface of a plurality of floor panels made of plywood or the like. There is known a so-called flooring structure in which floor panels for flooring are arranged side by side on a floor base made of a concrete floor slab or the like.

Such a double-floor structure has the advantage that the unevenness of the upper surface of the floor substrate can be absorbed by the support legs that can adjust the level, so that the trouble of smoothing the floor substrate is unnecessary, and the underfloor space below the floor panel material. Since it 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 and the air in the underfloor space vibrates due to the vibration of the floor panel material, the underfloor space in the double floor structure described above. Are continuous in the horizontal direction, so that the air vibration in the underfloor space is diffused in the horizontal direction and transmitted to a wide area. For this reason, in the above-mentioned double floor structure, the floor impact sound generated on the floor is transmitted as a loud impact sound to the downstairs, and there is a problem that the soundproof performance is not sufficient.

Further, in the above-mentioned double floor structure, since the floor panel material is supported by the supporting legs, when a floor impact force is applied to the upper surface of the floor panel material between the supporting legs, the floor panel material is greatly bent and vibrated. Therefore, there is also a problem that the floor impact sound is transmitted as a loud impact sound downstairs.

In view of the above, an object of the present invention is to provide a soundproof double floor structure excellent in soundproofing by a simple method.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a rigid strip-shaped sound insulating plate in a gap between floor panel materials to increase rigidity throughout the laid floor panel material. In addition, the sound insulation plate is projected downward from the lower surface of the floor panel material by a predetermined amount to partition the underfloor space by the sound insulation plate.

Specifically, a solution taken by the present invention is that 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, and the underfloor is placed below the floor panel materials. For a soundproof double floor structure in which a space is formed, a gap having an appropriate width is provided between the floor panel materials, and an upper surface of the floor panel material is connected to connect the upper surfaces of the floor panel materials. A connecting member having a substantially T-shaped cross section, comprising a fixed band-shaped rigid connecting plate fixed thereto and a band-shaped rigid sound insulating plate hanging down from the lower surface of the connecting plate, is provided with the sound insulating plate positioned in the gap. The sound insulating material of the connecting member protrudes from the lower surface of the floor panel material, the projecting amount is one third or more of the height of the underfloor space, and the lower end of the sound insulating material does not contact the upper surface of the floor base. Is set as the configuration.

(Operation) With the above configuration, since the amount of protrusion of the sound insulating plate from the lower surface of the floor panel material is one third or more of the height of the underfloor space, the floor impact sound is prevented from being diffused by the sound insulating plate. Is difficult to spread in the horizontal direction.

Also, since the lower end of the sound insulating plate does not contact the upper surface of the floor base, the floor added to the floor panel material. The impact is not directly transmitted to the floor.

Further, since the floor panel members are connected by a connecting member having a substantially T-shaped cross section, the connecting member having a band-shaped rigid connecting plate and a band-shaped rigid sound insulating plate hanging down from the connecting plate. The sound insulation plate acts as a reinforcing rib for the floor panel material, increasing the rigidity of the entire laid floor panel material, so that even if a floor impact force is applied to the upper surface of the floor panel material between the supporting legs, the floor panel material Bending vibration hardly occurs.

Furthermore, since the connecting member is provided with the sound insulation plate positioned in the gap between the floor panel materials, the above-described partition of the underfloor space and the rigidity of the floor panel material can be simultaneously performed. The connecting member can be attached after the floor panel material is arranged and leveled.

(Example) Hereinafter, an example of the present invention will be described with reference to 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 members 2 are provided with a plurality of support legs 3 on the upper surface of a floor base 1 made of a concrete floor slab or the like. 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, and an underfloor space 5 is formed between the floor substrate 1 and the floor panel material 2. ing. 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 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 appropriately.

The support leg 3 includes a truncated cone-shaped elastic body 3a placed on the upper surface of the floor substrate 1, and an adjusting bolt 3b whose height can be adjusted. The height of the adjusting leg 3b is increased by rotating the adjusting bolt 3b. ~ 150
The level can be adjusted within the range of mm.

As a feature of the present embodiment, a lattice-shaped gap 6 having a width of, for example, 50 mm is provided between the floor panel materials 2 as appropriate, and step-shaped notches 2a, 2a are formed in the peripheral edge of each floor panel material 2. Are provided, and the gap 6 and the opposed notch 2
A space having a T-shaped cross section is formed by a and 2a.

In the T-shaped space, a band-shaped connecting plate having rigidity is provided.
A connecting member 7 having a substantially T-shaped cross section is provided, which comprises a sound insulating plate 7b having a rigidity and hanging from the lower surface of the connecting plate 7a.

In this case, the thickness of the connecting plate 7a is formed to be substantially the same size as the height of the notch 2a, and the width of the connecting plate 7a is the total size of the width of the two opposing notches 2a and the gap 6. The connecting plate 7a is fixed to the upper surface of the cutout portion 2a of the floor panel material 2 by screwing or nailing. By doing so, the floor panel members 2 are firmly connected by the connecting plate 7a, and the plurality of floor panel members 2 form a single rigid floor as a whole, and the floor panel members 2 A flat plane is formed by the upper surface and the upper surface of the connection plate 7a.

The sound insulating plate 7b is arranged in the gap 6, and the lower end of the sound insulating plate 7b protrudes below the lower surface of the floor panel material 2 as appropriate. In this case, the projecting amount of the sound insulating plate 6a is preferably set as follows.

In other words, as the upper limit of the protrusion amount, a gap such that the lower end of the sound insulating plate 7b does not contact the upper surface of the floor base 1, for example, a gap of about 10 mm, is formed between the lower end of the sound insulating plate 7b and the upper surface of the floor base 1 even when the floor surface is bent. It is preferable that the pipe 7 is formed between them. When the pipe 7 is laid on the upper surface of the floor base 1, it is preferable to provide a gap such that the lower end of the sound insulating plate 7b does not hit the pipe 7.

In addition, the lower limit of the protrusion amount is one third of the height of the underfloor space.
It is preferable that it is above. The reason is as follows. That is, FIG. 4 shows the relationship between the clearance, which is the distance between the lower end of the sound insulating plate 7b and the upper surface of the floor substrate 1, and the number of lightweight floor impact sounds L when the height of the underfloor space 5 is 100 mm. Therefore, as is clear from the figure, when the clearance is between 100 mm and 67 mm, the L number sharply decreases as the clearance decreases.
This is because if the clearance is smaller than 67 mm, the L number becomes 55 or less. Further, the reason why the L number becomes 55 or less when the clearance is smaller than 67 mm is interpreted as follows. That is, when at least one-third of the height of the underfloor space 5 is partitioned by the sound insulating plate 7b, even if a floor impact force is applied to the upper surface of the floor panel material 2, the floor impact sound is blocked by the sound insulating plate 7b. This is because it becomes difficult to diffuse the underfloor space 5 in the horizontal direction.

As the material of the connecting plate 7a and the sound insulating plate 7b, the floor panel material 2
It is preferable to use a plate material having rigidity enough to reduce the bending deformation of the side edge portion and capable of nailing to the upper surface of the floor panel, specifically, a plywood, a particle board or a plastic provided with a screw hole. A mold material or a metal mold material 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. Also, regarding the specific size of the connecting plate 7a,
Thickness: 12 mm, width: 150 mm, length: about 1800 mm is preferable for handling, and regarding the specific size of the sound insulating plate 7 b, thickness: 15 m
m, height: about 80 mm, length: about 1800 mm are preferable for soundproofing.

As a method of connecting the connection plate 7a and the sound insulation plate 7b, they may be bonded to each other with an adhesive or made of a synthetic resin. Using To the lower surface of the connecting plate 7a and screw the sound insulating plate 7b May be stapled, but it is necessary that the sound insulating plate 7b be attached with such a strength that the sound insulating plate 7b does not fall off due to the impact force generated on the floor surface. When the connecting plate 7a and the sound insulating plate 7b are formed of the same material, both may be formed integrally.

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 in the peripheral portion of the floor panel material 2, and the connecting plate 7a is mounted on the upper surface peripheral portion of the floor panel material 2 with a screw or an adhesive. Fixed.

At the center of the upper surface of the floor panel material 2, joists 8 having substantially the same thickness as the connecting plate 7a of the connecting member 7 are juxtaposed at appropriate intervals. The finishing material 4 is directly laid, and the floor boards are supported by joists without using any discarding material. In this way, a space is formed on the lower surface of the floor finishing material 4 to improve the air permeability and to reduce the condensation under the floor.

Hereinafter, a sound insulation performance test of a lightweight floor impact sound performed for evaluating 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, 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, and as the connecting member 7, thickness: 12 mm, width: 150 m
A sound insulating plate 7b made of plywood having a thickness of 15 mm was bonded to a lower surface of a connecting plate 7a made of plywood of m, and the amount of protrusion of the sound insulating plate 7b from the lower surface of the floor panel material 2 was set to 60 mm.

Next, as a comparative example, a floor structure as shown in FIG.
That is, similarly to the specific example, a floor finishing material b made of a 12 mm thick wooden floor is laid on a floor panel material a made of particle board having a thickness of 30 mm, and a height: 100 mm below the floor panel material 2. Prepare a double-floor structure in which the underfloor space c is formed. The thickness is 25 mm and the density is 64 kg.
A glass wool mat of / m ³ was laid almost over the entire surface.

The result of the sound insulation performance test for the specific example and the comparative example is the sixth.
As shown in the figure, according to the structure of the comparative example, JIS-A
The sound insulation performance of lightweight floor impact noise due to -1418 is L-60,
While the level was slightly anxious, in the specific example of the present invention, the level of L-55 was not so disturbing, and the specific example had a soundproof performance of about 5 dB compared to the comparative example. It was confirmed that it was excellent.

(Effects of the Invention) As described above, according to the soundproof double floor structure of the present invention, the amount of protrusion of the sound insulating plate 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
The floor impact sound is hindered by the sound insulating plate and is difficult to diffuse in the underfloor space in the horizontal direction, and the floor panel materials are connected by a connection member having a substantially T-shaped cross-section having rigidity, so that the whole is rigid. In addition, even when a floor impact force is applied to the upper surface of the floor panel material, bending vibration is unlikely to occur in the floor panel material, so that the soundproofness is significantly improved.

In addition, since the connecting member is provided with the sound insulating plate positioned in the gap between the floor panel materials, it is possible to simultaneously perform the partition of the underfloor space and the rigidity of the floor panel material, and after the floor panel material is constructed. Since the connecting member can be attached, construction of the floor panel material and the sound insulating plate is extremely easy.

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

[Brief description of the drawings]

1 and 2 show a soundproof double floor structure according to an embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is a perspective view, and FIG. FIG. 4 is a diagram showing the relationship between the clearance and the number L of lightweight floor impact sounds.
FIG. 5 is a cross-sectional view of a comparative example as a conventional structure, and FIG. 6 is a diagram showing a sound insulation performance test result with respect to a lightweight floor impact sound of the specific example and the comparative example. DESCRIPTION OF SYMBOLS 1 ... Floor base 2 ... Floor panel material 3 ... Support leg 4 ... Floor finishing material 5 ... Under floor space 6 ... Gap 7 ... Connecting member 7a ... Connecting plate 7b ... Sound insulation plate

Continued on the front page (72) Inventor Hideki Miyamoto 2-3-18 Nakanoshima, Kita-ku, Osaka-shi, Osaka Inside Daiken Kogyo Co., Ltd. (72) Inventor Minoru Yamaguchi 2-3-1, Nakanoshima, Kita-ku, Osaka, Osaka Daiken Industry Co., Ltd.

Claims (1)

(57) [Claims] 1. A soundproofing system in which a plurality of floor panel materials 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, and an underfloor space is formed below the floor panel materials. A double-floor structure, in which a gap having an appropriate width is provided between the floor panel materials, and a strip-shaped rigidity fixed to the upper surface of the floor panel material so as to connect between the upper surfaces of the floor panel materials. A connecting member having a substantially T-shaped cross section, comprising a connecting plate having a rigid plate and a band-shaped rigid sound insulating plate hanging down from the lower surface of the connecting plate, is provided with the sound insulating plate positioned in the gap. The sound insulating material protrudes from the lower surface of the floor panel material, and the amount of protrusion is set so as to be one-third or more of the height of the underfloor space, and the lower end of the sound insulating material is set so as not to contact the upper surface of the floor base. Features a soundproof double floor structure.