JP2023050868A - floating floor structure - Google Patents

Abstract

To provide a floating floor structure capable of improving sound insulation performance and damping performance.SOLUTION: A floating floor structure 1 configured to form a specific space between a floor slab 2 and a floor substrate 10 comprises a sound proof layer (sound proof mat layer 12) provided in an intermediate part in a thickness direction of the floor substrate 10 and made of asphalt as a main material and having a thickness of 20 mm or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to floating floor structures.

BACKGROUND ART Conventionally, a floating floor (double floor) structure is known in which a predetermined space is formed between a floor slab and an underfloor. For example, it is as described in Patent Document 1.

Patent Literature 1 describes a dry soundproof double floor structure in which a surface floor material is provided on a particle board supported by support legs on a concrete slab.

The dry soundproof double floor structure described in Patent Literature 1 is mainly made of a wood-based material. Since such wood-based materials are relatively lightweight and have low rigidity, the insulation noise is small.

In addition, in order to increase the sound insulation, it is conceivable to use a material such as a PC plate or a calcium plate that is heavy and has high rigidity. However, in this case, since the floor becomes hard, the damping performance becomes low, and it is conceivable that vibration during walking or exercise is likely to occur. Therefore, a floating floor structure capable of improving sound insulation performance and attenuation performance is desired.

JP-A-2001-65156

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floating floor structure capable of improving sound insulation performance and attenuation performance.

The problems to be solved by the present invention are as described above, and the means for solving the problems will now be described.

That is, in claim 1, there is provided a floating floor structure in which a predetermined space is formed between a floor slab and an underfloor, which is provided at an intermediate portion in the thickness direction of the underfloor and uses asphalt as a main material. In addition, a soundproof layer having a thickness of 20 mm or more is provided.

In claim 2, the specific gravity of the soundproof layer is 2.5 or more.

In claim 3, the thickness dimension of the soundproof layer is 30 mm or more.

In claim 4, the soundproof layer is formed by integrally fixing a plurality of laminated members to each other.

As effects of the present invention, the following effects are obtained.

In claim 1, the sound insulation performance can be further improved.

In claim 2, the sound insulation performance can be further improved.

In claim 3, the sound insulation performance can be further improved.

In claim 4, the soundproof layer can be formed by combining members having a small thickness dimension.

BRIEF DESCRIPTION OF THE DRAWINGS Side sectional drawing which showed the floating-floor structure which concerns on one Embodiment of this invention. Tables and graphs showing test results for floating floor structures without an acoustic mat layer. Table and graph showing test results for floating floor structures with a soundproof mat layer thickness dimension of 40 mm. Table and graph showing test results for floating floor structures with a soundproof mat layer thickness dimension of 30 mm. Table and graph showing test results for floating floor structures with a soundproof mat layer thickness dimension of 20 mm. Table and graph showing test results for floating floor structures with a soundproof mat layer having a thickness dimension of 10 mm.

Below, the floating floor structure 1 which concerns on one Embodiment of this invention is demonstrated using FIG.

The floating floor structure 1 is a dry floating floor (double floor) structure in which a predetermined space is formed between a floor slab 2 and a subfloor 10 of a building. The floating floor structure 1 constitutes the floor of an indoor space on the second or higher floor of a building. The floating floor structure 1 constitutes the floor surface of an indoor space, such as a dance studio, a music room, or a fitness room, where vibrations and sounds larger than the sounds and vibrations that occur in normal life (daily life) are generated. The floating floor structure 1 comprises a floor slab 2 , a subfloor 10 , a vibration isolator 20 and a finishing material 30 .

The floor slab 2 is the structural floor of a multi-storey building. The floor slab 2 is made of reinforced concrete or the like.

The underfloor 10 serves as a base for the finishing material 30, which will be described later. The underfloor 10 is formed in a substantially rectangular plate shape. The underfloor 10 comprises a first underfloor material 11 , a soundproof mat layer 12 and a second underfloor material 13 .

The first base material 11 constitutes the lower part of the underfloor 10 . The first base material 11 is made of a wood-based material such as particle board. The thickness dimension of the first base material 11 is formed to be approximately 30 mm. The first base material 11 is formed by laminating two plate materials each having a thickness of 15 mm and adhering them to each other. It should be noted that the first base material 11 may be formed of a single plate instead of the above configuration.

The soundproof mat layer 12 forms an intermediate portion (intermediate layer) of the underfloor 10 in the vertical direction. The soundproof mat layer 12 is arranged on the upper surface of the first base material 11 . The soundproof mat layer 12 has sound insulation performance (soundproof performance) and vibration isolation performance. The soundproof mat layer 12 is formed in the form of a mat (sheet) having viscoelasticity (flexibility) and high specific gravity. The soundproof mat layer 12 is made mainly of asphalt. As the material of the soundproof mat layer 12, for example, a mixture of asphalt with a high specific gravity mineral powder (for example, iron oxide powder), rubber, resin, or the like can be used.

The soundproof mat layer 12 has a specific gravity of 2.5 or more, preferably 3.0 or more. By making the specific gravity of the soundproof mat layer 12 relatively large, sound insulation performance can be improved.

The thickness dimension of the soundproof mat layer 12 is formed to be 20 mm or more. By increasing the thickness dimension of the soundproof mat layer 12 relatively, the sound insulation performance can be improved. From the viewpoint of further improving the sound insulation performance, the thickness of the soundproof mat layer 12 may be 30 mm or more, preferably 40 mm or more. In this embodiment, the thickness of the soundproof mat layer 12 is set to 40 mm.

In the present embodiment, the soundproof mat layer 12 is formed by laminating a plurality of mats 12a made mainly of asphalt. As the mat 12a, for example, a mat (sheet) formed by kneading asphalt with iron powder and integrating synthetic resin non-woven fabric on the front and back sides of the kneaded asphalt can be used. The plurality of mats 12a are adhered to each other with an adhesive, double-sided tape, or the like, and fixed integrally. In this embodiment, the soundproof mat layer 12 is formed by stacking four mats 12a each having a thickness of 10 mm.

The second base material 13 constitutes the upper part of the underfloor 10 . The second base material 13 is arranged on the upper surface of the soundproof mat layer 12 . The second base material 13 is made of the same material as the first base material 11 . The thickness dimension of the second base material 13 is formed to be approximately 15 mm.

As described above, the underfloor 10 is formed by sandwiching the soundproof mat layer 12 between the first base material 11 and the second base material 13 . The first backing material 11, the soundproof mat layer 12, and the second backing material 13 are fixed to each other by predetermined fasteners, adhesives, or the like.

The ratio of the thickness of the soundproof mat layer 12 to the entire underfloor 10 is 30% or more, preferably 40% or more. In this embodiment, the ratio of the thickness of the soundproof mat layer 12 to the entire underfloor 10 is about 42%.

Further, in this embodiment, the thickness dimension of the soundproof mat layer 12 is formed to be greater than or equal to the thickness dimension of each of the first base material 11 and the second base material 13 .

The vibration isolator 20 has vibration isolation performance and supports the underfloor 10 . The anti-vibration part 20 is formed in a substantially plate shape with its plate surface facing up and down. A plurality of vibration isolating portions 20 are provided on the lower surface of the first base material 11 of the underfloor 10 . The positions at which the plurality of anti-vibration parts 20 are provided can be appropriately set from the viewpoint of supporting the underfloor 10 appropriately. Also, the vibration isolator 20 is fixed to the first base material 11 with a predetermined fastener, adhesive, or the like.

The vibration isolator 20 is made of an elastic (flexible) material. Specifically, the vibration isolator 20 is made of rubber or the like. The thickness dimension of the vibration isolator 20 is formed to be 17 mm or more. Note that the thickness dimension of the vibration isolator 20 is not limited to the above values, and can be appropriately set from the viewpoint of the height of the floor surface, vibration isolation performance, and the like.

The lower surface of the vibration isolator 20 contacts the upper surface of the floor slab 2 . A space is formed between the upper surface of the floor slab 2 and the lower surface of the underfloor 10 (first base material 11) by providing the vibration isolator 20. As shown in FIG.

The finishing material 30 constitutes the upper surface (floor surface) of the floating floor structure 1 . The finishing material 30 is provided on the upper surface of the second base material 13 of the underfloor 10 . The finishing material 30 is formed in a substantially rectangular plate shape. A predetermined flooring material or the like can be used as the finishing material 30 .

When constructing the floating floor structure 1 as described above, first, a plurality of subfloors 10 and vibration isolator 20 are arranged on the upper surface of the floor slab 2 . At this time, a predetermined heat insulating material such as glass wool may be provided in the space between the upper surface of the floor slab 2 and the lower surface of the underfloor 10 .

Next, a plurality of finishing materials 30 are arranged so as to cover the upper surface of the underfloor 10 (second base material 13), and the finishing materials 30 are attached to the second base material 13 using predetermined fasteners, adhesives, or the like. fixed. This completes the construction of the floating floor structure 1 .

According to the floating floor structure 1 as described above, the sound insulation performance can be improved by collectively arranging the soundproof mat layer 12 in the intermediate layer of the underfloor 10 (floating floor structure 1). That is, unlike soundproof mats used in general dry floating floors, the soundproof mat layer 12 is formed of a material with a relatively large specific gravity (2.5 or more), and the thickness dimension of the soundproof mat layer 12 is compared. It is formed relatively large (20 mm or more). With such a configuration, the internal loss of vibration due to the soundproof mat layer 12 is increased, and the damping performance of sound and vibration is enhanced. Thereby, the sound insulation performance of the floating floor structure 1 is improved. In addition, it is possible to reduce the feeling that the floor shakes (feeling of vibration) when walking or exercising in the indoor space.

Below, the effect of the floating floor structure 1 according to this embodiment will be described with reference to the experimental results shown in FIGS.

The tables and graphs shown in FIGS. 2 to 6 show the test results of the sound insulation performance of a plurality of specimens in which the thickness of the soundproof mat layer 12 (the number of mats 12a) of the floating floor structure 1 is changed. . The above test was conducted in accordance with "JIS A 1418-2:2000 Measuring method of floor impact sound insulation performance of buildings - Part 2: Method using standard weight impact source".

A specimen used in the above test is a floating floor structure 1 having a square shape in a plan view and having a side of 2730 mm. In the above test, vibration using a standard weight impact source was performed at each of the five locations (vibration 1 to vibration 5) of the floating floor structure 1 installed on the upper floor, and the floor impact sound level ( dB) is measured. Also, in the above test, the floor impact sound level (dB) is measured for each of a plurality of center frequencies (Hz). In the above test, the average value of the floor impact sound levels (dB) of excitation 1 to excitation 5 is calculated for each center frequency (Hz), and the sound insulation grade (L number) is obtained based on the average value.

The table on the left side of each figure from FIG. 2 to FIG. 6 shows the floor impact sound level (dB) and the average value at each location measured for each center frequency (Hz). The graph on the right side of each figure shows the relationship between the center frequency (Hz) and the average floor impact sound level (dB). The graph above shows a curve representing insulation ratings from L-40 to L-85. If the average value of the floor impact sound level (dB) for each center frequency (Hz) of the test piece is below the value of the curve indicating a certain sound insulation class, the test piece is recognized as having the performance of the sound insulation class. It can be said that the lower the floor impact sound level (dB) and the sound insulation grade, the higher the sound insulation performance.

The test results for each specimen will be described below. In the following, the test results will be explained with attention paid to the average value of the floor impact sound level (dB) with a center frequency (Hz) of 63 Hz.

FIG. 2 shows the test results of a specimen without the soundproof mat layer 12 . As shown in the table of FIG. 2, the average value of the floor impact sound level (dB) at 63 Hz of the test specimen is 76.7 dB. The sound insulation grade of the test specimen is LH-55.

FIG. 3 shows the test results of a test piece in which the soundproof mat layer 12 has a thickness of 40 mm (four mats 12a). As shown in the table of FIG. 3, the average value of the floor impact sound level (dB) at 63 Hz of the test specimen is 69.4 dB. Moreover, the sound insulation grade of the test specimen is LH-45.

FIG. 4 shows the test results of a test piece with a soundproof mat layer 12 having a thickness of 30 mm (three mats 12a). As shown in the table of FIG. 4, the average value of the floor impact sound level (dB) at 63 Hz of the test specimen is 70.9 dB. Moreover, the sound insulation grade of the test specimen is LH-50.

FIG. 5 shows the test results of a test piece with a soundproof mat layer 12 having a thickness of 20 mm (two mats 12a). As shown in the table of FIG. 5, the average value of the floor impact sound level (dB) at 63 Hz of the test specimen is 75.4 dB. Moreover, the sound insulation grade of the test specimen is LH-50.

FIG. 6 shows the test results of a test piece in which the soundproof mat layer 12 has a thickness of 10 mm (one mat 12a). As shown in the table of FIG. 6, the average value of the floor impact sound level (dB) at 63 Hz of the test specimen is 77.6 dB. The sound insulation grade of the test specimen is LH-55.

As is clear from the test results shown in FIGS. 2 to 6, the test specimens with the soundproof mat layer 12 having a thickness of 20 mm or more (two mats 12a) or the test sample in which the thickness of the soundproof mat layer 12 is 10 mm).

That is, the test sample with the soundproof mat layer 12 having a thickness of 20 mm has a floor impact sound level (dB) lower by 1.3 dB and a sound insulation grade one rank higher than the test sample without the soundproof mat layer 12 . In addition, the test sample with the soundproof mat layer 12 having a thickness of 30 mm had a floor impact sound level (dB) lower by 5.8 dB and a sound insulation grade one rank higher than the test sample without the soundproof mat layer 12 . In addition, the test sample with the soundproof mat layer 12 having a thickness of 40 mm had a floor impact sound level (dB) lower by 7.3 dB and a sound insulation grade higher by two ranks than the test sample without the soundproof mat layer 12 . It should be noted that the test sample with the soundproof mat layer 12 having a thickness of 10 mm did not show any advantageous effect compared to the test sample without the soundproof mat layer 12 .

From the above results, it was shown that in the test specimens in which the thickness dimension of the soundproof mat layer 12 is 20 mm or more, the sound insulation performance increases as the thickness dimension of the soundproof mat layer 12 increases. Further, it was shown that if the thickness dimension of the soundproof mat layer 12 is 30 mm or more, the sound insulation performance is significantly improved, and if the thickness dimension is 40 mm or more, the sound insulation performance is further improved. .

As described above, the floating floor structure 1 according to one embodiment of the present invention is
A floating floor structure 1 in which a predetermined space is formed between a floor slab 2 and a subfloor 10,
A soundproof layer (soundproof mat layer 12) is provided at an intermediate portion in the thickness direction of the underfloor 10, is mainly made of asphalt, and has a thickness of 20 mm or more.

With such a configuration, sound insulation performance and attenuation performance can be improved. That is, by arranging a soundproof layer (soundproof mat layer 12) made of a material having viscoelasticity and a relatively large specific gravity and having a relatively large thickness as an intermediate layer of the underfloor 10, the floating floor structure 1 The damping performance of sound and vibration can be improved, and the sound insulation performance can be improved.

Further, the specific gravity of the soundproof layer (soundproof mat layer 12) is 2.5 or more.

With such a configuration, the sound insulation performance can be further improved. That is, by increasing the specific gravity of the soundproof layer (soundproof mat layer 12), the sound insulation performance can be further improved.

Further, the thickness dimension of the soundproof layer (soundproof mat layer 12) is 30 mm or more.

With such a configuration, the sound insulation performance can be further improved. That is, by increasing the thickness of the soundproof layer (soundproof mat layer 12), the sound insulation performance can be further improved.

In addition, the soundproof layer (soundproof mat layer 12) is
It is formed by integrally fixing a plurality of laminated members (mats 12a) to each other.

With such a configuration, a soundproof layer (soundproof mat layer 12) can be formed by combining members (mat 12a) having a small thickness dimension.

The soundproof mat layer 12 in this embodiment is one form of the soundproof layer according to the present invention.
Also, the mat 12a according to the present embodiment is one form of the laminated member according to the present invention.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

For example, in the present embodiment, an example in which the soundproof mat layer 12 is provided by laminating a plurality of mats 12a is shown, but the present invention is not limited to such an aspect. For example, the soundproof mat layer 12 may be formed by one member.

Moreover, in the present embodiment, the thickness dimension of the soundproof mat layer 12 is set to 40 mm, but it is not limited to such an aspect. Various values from 20 mm to 40 mm can be set as the thickness dimension of the soundproof mat layer 12, and a value exceeding 40 mm can be set.

Further, in the present embodiment, the underfloor 10 and the finishing material 30 are separate pieces, but the present invention is not limited to such an aspect. For example, the subfloor 10 and the finishing material 30 may be fixed together.

Further, in the present embodiment, an example in which the first base material 11, the soundproof mat layer 12, and the second base material 13 of the underfloor 10 are fixed to each other is shown, but the present invention is not limited to such an aspect. For example, the first base material 11, the soundproof mat layer 12 and the second base material 13 may be formed separately from each other. When constructing such a subfloor 10, each member is laid in the order of the first subfloor material 11, the soundproof mat layer 12 and the second subfloor material 13.例文帳に追加

Further, in this embodiment, an example in which a space is formed between the upper surface of the floor slab 2 and the lower surface of the underfloor 10 by the vibration isolator 20 is shown, but the present invention is not limited to such an aspect. For example, the space may be formed using support legs (bundles) used in a general floating floor structure. In this case, instead of or in addition to providing the anti-vibration part 20 on the underfloor 10, the anti-vibration part 20 may be provided on the lower part of the supporting leg.

Also, in the present embodiment, an example in which the first base material 11 and the second base material 13 are formed of particle board is shown, but the present invention is not limited to such an aspect. As materials for the first base material 11 and the second base material 13, various wood-based materials such as plywood and medium density fiberboard (MDF) can be used.

Moreover, in the present embodiment, the underfloor 10 is provided with the second underfloor material 13, but the present invention is not limited to such an aspect. For example, the second base material 13 may not be provided on the underfloor 10 . In this case, a finishing material 30 such as a flooring material is provided on the upper surface of the soundproof mat layer 12 .

Moreover, in the present embodiment, an example in which the finishing material 30 is a flooring material is shown, but the present invention is not limited to such an aspect. As the finishing material 30, various floor finishing materials such as cushion floors, carpets, and tiles can be used.

REFERENCE SIGNS LIST 1 floating floor structure 10 underfloor 11 first base material 12 soundproof mat 13 second base material 20 anti-vibration part 30 finishing material

Claims (4)

A floating floor structure in which a predetermined space is formed between a floor slab and a subfloor,
A soundproof layer provided at an intermediate portion in the thickness direction of the underfloor, made mainly of asphalt, and having a thickness of 20 mm or more,
floating floor structure. The specific gravity of the soundproof layer is 2.5 or more.
A floating floor structure according to claim 1. The thickness dimension of the soundproof layer is 30 mm or more,
A floating floor structure according to claim 1 or claim 2. The soundproof layer is
formed by integrally fixing a plurality of laminated members to each other,
Floating floor structure according to any one of claims 1 to 3.

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