JP3460396B2 - Soundproof double floor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material for constructing a double floor, and mainly relates to a technique for improving soundproof performance.

[0002]

2. Description of the Related Art In recent years, double floors have rapidly become popular because they can be installed under the floor in apartments and the like and have good workability. This double floor is laid so that a plurality of support legs of a floor material, which are configured by projecting support legs from a plurality of lower surfaces of a floor base material, are placed next to each other by placing them on a floor base such as a concrete slab. Therefore, soundproofness against floor impact is ensured by a soundproof material arranged in the underfloor space or a vibration-proof rubber provided at the lower ends of the supporting legs (Actually No. Sho 63-8328).
Japanese Patent Laid-Open No. 2-229357, Japanese Patent Laid-Open No. 6-1
0492, JP 63-272858 A, JP 4-111845 A, JP 63-16125 A.
No. 6 publication).

[0003]

By the way, regarding the double floor, the propagation path of the impact sound caused by the splashing, walking, dropping of an object, etc. is the vibration of the floor base material to the floor base material via the supporting legs. A solid propagation path that propagates and an air propagation path that radiated sound from the floor substrate propagates as an acoustic wave in an air layer between the floor substrate and the floor substrate can be considered. Conventionally, in order to improve the soundproof performance related to floor impact sound, a structure in which antivibration rubber is arranged on the support legs has been taken, but in order to improve the soundproof performance, even if the elasticity of the antivibration rubber is made low In addition to not improving the performance so much, the rigidity of the entire floor decreases, the load bearing becomes worse,
There was a problem that the feeling of walking was reduced.

An object of the present invention is to provide a double floor which secures rigidity as a floor and has high soundproofing performance even in a low sound range.

[0005]

According to a first aspect of the present invention, there is provided a soundproof double floor provided with a floor base material, joists, support legs, and a plate-shaped material. The floor substrate constitutes the floor surface. The joists have notches formed on both sides of the floor base material and support the floor base material. The supporting legs support the joists on the floor base. The plate-shaped material is placed in the notch of the joist so as to connect the adjacent joists. An air layer is formed between the floor substrate and the plate-shaped material
The vertical depth of the joist notch is
It is set larger than the thickness of the material.

[0006] According to a second aspect of the invention, the soundproof double bed according to claim 1, which is further soundproof double flooring having a first porous material disposed air layer. The invention according to claim 3 is the soundproof double floor according to claim 1 or 2, further comprising a second porous material disposed between the plate-shaped material and the floor base. is there.

According to a fourth aspect of the present invention, in the double floor structure according to the third aspect, at least a surface of the second porous material facing the floor base material is provided with a planar body that vibrates when a sound wave enters. It is a soundproof double floor fitted. The invention according to claim 5 is a joist that supports a floor base material that is supported on a floor base by support legs and constitutes a floor surface, and has notches formed on both sides of the floor base material side, It is a joist for a soundproof double floor, in which a plate-like material arranged so as to connect the joists is received by a notch.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the configuration of an embodiment of a soundproof double floor according to claim 1. The soundproof double flooring of this embodiment has a floor base material constituting a floor surface, joists having notches formed on both sides of the floor base material and supporting the floor base material, and supporting the joists on the floor base. In a soundproof double floor comprising a supporting leg to be installed and a plate-like material placed in a notch of the joist so as to connect between adjacent joists, an air layer is present between the floor base material and the plate-like material. As is formed, the depth of the notch of the joist in the up-down direction is set to be larger than the thickness of the plate-shaped material.

As shown in FIG. 1, this soundproof double floor comprises a floor base material 1, joists 2, support legs 3, and a plate-shaped material 6. The floor base material 1 constitutes a floor surface and is supported by joists 2. The joists 2 are supported on the floor base 5 by the support legs 3. As shown in FIG. 2, the joist 2 has cutouts 4 formed on both sides of the floor base material 1 (or both shoulders). The cutouts 4 are provided on both sides of the joist 2 on the side of the floor base material 1 over the entire length of the joist 2, or a part of the whole length of the joist 2 (the plate-shaped material 6 is partially provided as shown in FIG. 4). When it is mounted on the plate, it may be provided only on the part on which the plate-shaped material 6 is mounted). The vertical depth of the notch 4 is set to be larger than the thickness of the plate-shaped material 6. The plate-shaped material 6 is placed in the notch 4 of the joist 2 so as to connect the adjacent joists 2 to each other. An anti-vibration rubber 8 is interposed between the support leg 3 and the floor base 5.
The floor base 5 is, for example, a concrete slab or the like. As the anti-vibration rubber 8, for example, one having a hardness of 50 degrees is used. In the present embodiment, the structure using the anti-vibration rubber 8 is used, but the following effects can be obtained similarly even when the anti-vibration rubber is not provided.

Examples of the floor substrate 1 include commonly used ones such as wood floor materials. The floor base material 1 constitutes the floor surface, but in the present invention, the floor base material itself may constitute the final finished floor surface, or a cappate or a makeup applied on the floor base material. A floor finishing material such as a plate may form the final finished floor surface. The joists 2 and the plate-like material 6 may be wood materials such as sword bark, cedar, cypress, laminated wood, and commonly used building materials such as resin moldings.

The plate-like material 6 has a lower surface at the end thereof.
It is received on the shelf of the notch 4 of the joist 2. Further, the joists 2 are sandwiched between the plate-like materials 6 and are hard to bend in the lateral direction. Therefore, the floor base material 1 is unlikely to bend in the vertical direction between the joists 2, the bending rigidity of the floor base material 1 is improved, and the vibration of the floor base material 1 is suppressed by the plate-shaped material 6, and the sound insulation performance is improved. improves.

Further, in the present embodiment, the air layer 7 is formed between the floor base material 1 and the plate-like material 6, but there is no air layer as shown in FIG. 3 (the depth of the notch 4 in the vertical direction). Is the same as or substantially the same as the thickness of the plate-shaped material 6), and further, a configuration as shown in FIG. 4 in which the plate-shaped material 6 is partially used (the plate-shaped material 6 is placed over the entire length of the joist 2). It is not placed here, but is placed here and there) . However, the figure
The configurations of 3 and 4 deviate from the technical scope of the present invention.
It is a technology.

In the case of the construction shown in FIG. 3, since the joists 2 are sandwiched between the plate-like materials 6 and the floor base material 1 is difficult to bend between the joists 2,
The bending rigidity of the floor base material 1 is increased. In the case of the configuration of FIG. 4, the plate-shaped materials 6 may be arranged irregularly,
As shown in FIG. 4, it is preferable that the joists 2 are arranged in a row laterally with respect to the length direction. When the plate-shaped materials 6 are arranged laterally in the length direction of the joist 2, the joists 2 are sandwiched between the plate-shaped materials 6, so that the vibration of the joist 2 is more easily suppressed.

FIG. 5 shows a soundproof double floor 1 according to the second aspect of the present invention.
It is sectional drawing which shows the structure of embodiment. The soundproof double floor shown in FIG. 5 has a structure in which the first porous material 10 such as glass wool or rock wool is inserted in the air layer 7 between the floor base material 1 and the plate-shaped material 6, and the others are shown in FIG. The configuration is the same as that of the embodiment. The porous material 10 inserted into the air layer 7 between the floor base material 1 and the plate-shaped material 6 may have a thickness smaller than that of the air layer 7, or may be the same as the thickness of the air layer 7. It may be one that can be compressed to some extent to have the same thickness as the air layer 7.

In the above structure, the porous material 10 to be inserted into the air layer 7 is not limited to glass wool, but polyurethane foam, polyethylene foam or PVC.
A resin foam such as foam (polyvinyl chloride foam), various soft resin materials or various rubber-based materials can be used. Further, in addition to this, it is possible to use a fiber formed into a sheet or a mat, and as such a fiber, polyester, nylon, polyacrylonitrile, polypropylene, polyethylene, a synthetic resin fiber such as polyvinyl chloride, or, Natural fibers such as wood fiber, cotton, hemp, bamboo, linter, silk, and wool, or regenerated fiber such as rayon can be used. As inorganic fibers, rock fiber, glass, alumina, silicon carbide,
Fibers such as steel can be mentioned.

FIG. 6 shows a soundproof double floor 1 according to the present invention.
It is sectional drawing which shows the structure of embodiment. The soundproof double floor shown in FIG. 6 has a configuration in which a second porous material 11 such as glass wool or rock wool is inserted into the space between the plate-shaped material 6 and the floor base 5, and the other embodiment is the same as the embodiment shown in FIG. It has the same configuration as. The porous material 11 inserted between the plate-like material 6 and the floor base 5 may have a thickness smaller than the gap between the plate-like material 6 and the floor base 5, or the same thickness as the gap. However, it may be compressed to some extent to have the same thickness as the gap.

In the above structure, the plate-like material 6 and the floor base 5
The porous material 11 to be inserted into the space between is not limited to glass wool, but a resin foam such as polyurethane foam, polyethylene foam or PVC foam (polyvinyl chloride foam), various soft resin materials or various rubber-based materials. Can be used. Further, in addition to this, it is possible to use a fiber formed into a sheet or a mat, and as such a fiber, polyester, nylon, polyacrylonitrile, polypropylene, polyethylene, a synthetic resin fiber such as polyvinyl chloride, or, Examples include natural fibers such as wood fiber, cotton, hemp, bamboo, linter, silk and wool, or regenerated fibers such as rayon, and inorganic fibers such as rock fiber, glass, alumina, silicon carbide and steel. be able to.

FIG. 7 shows a soundproof double floor according to claim 4.
It is sectional drawing which shows the structure of embodiment. In the soundproof double floor shown in FIG. 7, the porous material 10 such as glass wool or rock wool is inserted into the air layer 7 between the floor base material 1 and the plate-like material 6, and the space between the plate-like material 6 and the floor base 5 is inserted. Has a structure in which a porous material 11 such as glass wool or rock wool is inserted into
Others have the same configuration as that of the embodiment shown in FIG.
In the above structure, the porous material 10 to be inserted into the air layer 7
The thickness and the material can be the same as those of the soundproof double floor according to claim 2. In the above structure, the porous material 11 to be inserted into the space between the plate-like material 6 and the floor base 5 may have the same thickness and material as those of the soundproof double floor according to claim 3. it can.

[0019] FIG. 8 is a sectional view showing a structure of another implementation form. The soundproof double floor shown in FIG. 8 has a configuration in which the sound absorber 30 is inserted between the plate-shaped material 6 and the floor base 5, and the other configurations are the same as those of the embodiment shown in FIG. Sound absorber 30
Is formed by wrapping the surface of the porous material 11 not only on the surface facing the floor substrate 1 (the surface facing the plate-shaped material 6) but also on the entire surface of the porous material 11 with a planar body 20. The planar body is, for example, a sheet-shaped or plate-shaped material, and its thickness and material are appropriately selected so as to vibrate when a sound wave is incident.

In the above structure, the sheet may be a sheet-shaped or plate-shaped material such as a vinyl sheet which vibrates when a sound wave enters.

[0021]

EXAMPLES Examples of the present invention and comparative examples outside the scope of the present invention will be shown below, but the present invention is not limited to the following examples. (Example 1) A soundproof double floor shown in FIG. 1 was produced. This soundproof double floor comprises a floor base 1, joists 2, plate-like material 6, support legs 3,
In a double floor composed of a vibration-proof rubber 8 and a floor base 5, a notch 4 is provided in the joist 2 and adjacent joists 2 are connected by a plate-like material 6. As the anti-vibration rubber 8, one having a hardness of 50 degrees was used. In this embodiment, the antivibration rubber 8 is used, but the following effects can be obtained similarly even when the antivibration rubber is not used. Wooden floor 12m as floor base material 1
m thick, pine timber as joist 2 and plywood 9 as plate material 6
mm thickness was used respectively. Notches 4 having the dimensions (unit: mm) shown in FIG. 2 were provided on both sides of the joist 2 on the floor substrate 1 side. The air layer 7 between the floor base material 1 and the plate-shaped material 6 has a thickness of 36 mm. (Comparative Example 1) A soundproof double floor was prepared in the same manner as in Example 1 except that the plate-shaped material 6 was not placed. (Example 2) A soundproof double floor shown in Fig. 5 was produced. This soundproof double floor has the same configuration as that of the first embodiment except that the first porous material 10 is inserted in the air layer 7 between the floor base material 1 and the plate-shaped material 6. The first porous material 10 has a density of 24 kg /
m ^3, a glass wool having a thickness of 50 mm. Example 3 A soundproof double floor shown in FIG. 6 was produced. This soundproof double floor has the same configuration as that of the first embodiment except that the second porous material 11 is inserted between the plate-shaped material 6 and the floor base 5. The second porous material 11 has a density of 24 kg / m ³ and a thickness of 1
It is a glass wool of 00 mm. (Example 4) A soundproof double floor shown in FIG. 7 was produced. In this soundproof double floor, the first porous material 10 is inserted in the air layer 7 between the floor base material 1 and the plate-like material 6, and the second porous material is provided between the plate-like material 6 and the floor base 5. It has the same configuration as in Example 1 except that the material 11 was inserted. First porous material 10
Is a glass wool having a density of 24 kg / m ³ and a thickness of 50 mm. The second porous material 11 is glass wool having a density of 24 kg / m ³ and a thickness of 100 mm. Example 5 A soundproof double floor shown in FIG. 8 was produced. This soundproof double floor has the same configuration as that of the fourth embodiment except that the sound absorber 30 is inserted between the plate-shaped material 6 and the floor base 5. The sound absorbing body 30 is configured by wrapping the periphery of the second porous material 11 with a planar body 20 that vibrates when a sound wave is incident. The second porous material 11 is glass wool having a density of 24 kg / m ³ and a thickness of 100 mm, and the sheet 20 is a vinyl sheet having a thickness of 0.05 mm.

The soundproof performance evaluation results of the double floors of the above-mentioned embodiment and comparative example will be described below. FIG. 9 shows the floor impact sound levels of the double floor of Example 1 and the general double floor in which the plate-shaped material 6 is not mounted in Example 1 (Comparative Example 1: the same applies below) for the line a and It is shown by the line b. From the figure, it can be seen that the double floor of Example 1 has improved soundproofing performance in the low frequency range and a floor impact sound level of about 2 dB reduced as compared with Comparative Example 1.

FIG. 10 shows the floor impact sound levels of the double floor of Example 2 and a general double floor by lines a and b, respectively. From the figure, it can be seen that the double floor of Example 2 has improved soundproofing performance in the middle and low range, and the floor impact sound level is reduced by about 2 dB between 63 and 500 Hz. FIG. 11 shows the floor impact sound levels of the double floor of Example 3 and a general double floor by lines a and b, respectively. From the figure, it is understood that the double floor of Example 3 has improved soundproofing performance, and particularly the floor impact sound level is reduced by 5 dB or more in the vicinity of 125 to 250 Hz.

FIG. 12 shows the floor impact sound levels of the double floor of Example 4 and a general double floor by lines a and b, respectively. From the figure, the soundproofing performance of the double floor of Example 4 is improved in the entire frequency range, and especially 6d in the vicinity of 125 to 250 Hz.
It can be seen that the floor impact sound level is reduced by B or more. FIG. 13 shows the floor impact sound levels of the double floor of Example 5 and a general double floor by lines a and b, respectively. From the figure, it is understood that the double floor of Example 5 has improved soundproofing performance in the entire frequency range, and in particular, the floor impact sound level is reduced by 7 dB or more in the vicinity of 125 to 250 Hz.

[0025]

The soundproof double floor according to the present invention comprises a floor base material constituting a floor surface, a joist having notches formed on both sides of the floor base material to support the floor base material, and a joist. The base material and the plate-like material are provided with the support legs for supporting the floor base and the plate- like material placed in the notches so as to connect the adjacent joists.
Above the joist notch so that an air layer is formed between the materials
Since the depth in the downward direction is set to be larger than the thickness of the plate-shaped material, it is possible to improve the rigidity of the floor base material, which can suppress the vibration of the floor base material that is the vibration source. , High soundproofing characteristics can be obtained.

The soundproof double bed according to the invention of claim 2 is the invention according to claim 1, since further comprising a first porous material disposed in the air layer, flooring substrate Sound waves emitted from the first porous material are reduced by the sound absorbing effect of the first porous material, and high soundproof performance is obtained.

The invention according to claim 3 is the same as the invention according to claim 1, further comprising a second porous material disposed between the plate-shaped material and the floor substrate, High sound insulation performance can be obtained by reducing the sound wave radiated by the sound absorbing effect of the second porous material and expressing the flow resistance effect against the movement of air between the joists accompanying the vibration of the plate-shaped material. .

[0028] The invention according to claim 3 also provides the invention according to claim 2
In the invention described in (4), since the second porous material disposed between the plate-shaped material and the floor substrate is further provided, the sound wave radiated from the floor base material is absorbed by the first porous material. Furthermore, the sound wave radiated from the plate-shaped material is reduced by the sound absorption effect of the second porous material, and a flow resistance effect is exhibited against the movement of air between joists accompanying the vibration of the plate-shaped material. As a result, high soundproof performance can be obtained.

According to a fourth aspect of the present invention, in the invention according to the third aspect, at least a surface of the second porous material facing the floor base material is fitted with a planar body that vibrates when a sound wave is incident. Therefore, in addition to the sound absorption effect and the flow resistance effect of the porous material according to the third or fourth aspect, the energy absorption effect due to the film vibration of the planar body is exhibited, and high soundproof performance is obtained.

[0030]

[Brief description of drawings]

1 is a sectional view showing an embodiment of a soundproof double floor according to the invention of claim 1;

Figure 2 is a configuration diagram of one embodiment of a joist for soundproofing double bed.

3 is a cross-sectional view showing another embodiment of the soundproofing double bed.

4 is a cross-sectional view showing still another embodiment of the soundproofing double bed.

FIG. 5 is a sectional view showing one embodiment of a soundproof double floor according to the invention of claim 2;

FIG. 6 is a sectional view showing an embodiment of a soundproof double floor according to the invention of claim 3;

FIG. 7 is a sectional view showing an embodiment of a soundproof double floor according to the invention of claim 4;

8 is a cross-sectional view showing another embodiment of the soundproofing double bed.

9 is a graph showing the soundproof performance of the soundproof double floor of Example 1. FIG.

10 is a graph showing the soundproof performance of the soundproof double floor of Example 2. FIG.

11 is a graph showing the soundproof performance of the soundproof double floor of Example 3. FIG.

FIG. 12 is a graph showing the soundproofing performance of the soundproof double floor of Example 4.

FIG. 13 is a graph showing the soundproof performance of the soundproof double floor of Example 5.

[Explanation of symbols]

1 Floor base material 2 jota 3 support legs 4 notches 5 floor base 6 Plate material 7 Air layer 8 anti-vibration rubber 10 First porous material 11 Second porous material 20 sheet 30 sound absorber

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kosuke Nakamura 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Masayuki Okusawa, 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) References JP-A-3-5563 (JP, A) SAIKAI Sho 60-15539 (JP, U) SHIKOKEI 4-14595 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) E04F 15/00-15/22

Claims (4)

(57) [Claims] 1. A floor base material constituting a floor surface, a joist having notches formed on both sides of the floor base material for supporting the floor base material, and a support for supporting the joist on a floor base. comprising a leg, adjacent the plate material so as to connect them joists are placed on away the cut, so that the air layer is formed between the plate-shaped material as said flooring substrate
In the vertical direction of the cutout of the joist is the plate-shaped material
Soundproof double floor that is set larger than the thickness of . 2. A pre-Symbol further comprising a first porous material disposed to an air layer, soundproof double bed according to claim 1. 3. The method according to claim 1, further comprising a second porous material disposed between the plate-shaped material and the floor base.
Soundproof double floor as described in. 4. The soundproof double floor according to claim 3, wherein at least a surface of the second porous material facing the floor base material is fitted with a planar body that vibrates upon incidence of a sound wave.