JPH08199781A - Soundproofing double floor - Google Patents

Abstract

PURPOSE: To provide a high soundproofing performance by installing a composite floor material, which interposes a damping sheet to the top of joists and installing support legs and rubber vibration insulators to the bottom of the Joists so that they may come in contact with the surface of a sub-floor. CONSTITUTION: An intermediate plywood 18a as a base material 18 is laminated on a damping sheet 17 where a composite floor material A, which is a laminate of a foam sheet 19 and a surface decorative plywood 20, is formed on the intermediate plywood 18a. The composite floor material A is loaded on the top of the joists 2. Then, support legs 3 are installed to the bottom of the joists 2. The height of the support legs in the central part is adjusted by means of a level, thereby detecting a specified level. The height of each support 189 3 is adjusted and the rubber vibration insulators 4 are installed on an under floor ground surface 5. It is, therefore, possible to enhance the vibration inhibition effect of the surface finishing material and hence raise the soundproofing performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof floor structure using a joist construction method.

[0002]

2. Description of the Related Art Conventionally, in an apartment house, the noise of falling onto the floor and the noise of impact of children's running footsteps may cause unacceptable noise to the downstairs, which may cause serious social problems. It causes the problem.
Therefore, various floor structures have been proposed that absorb these impact sounds and do not transmit noise.

As one of such soundproof floor structures, as shown in FIG. 9, a surface finishing material (a) is a discarding adhesive material (a).
Etc., the floor panel (c) placed on top of it is supported by the support legs (d) and the anti-vibration rubber (e) against the floor surface (f) of the concrete slab etc. to prevent vibration due to floor impact. A double-floor structure is known in which the support legs (d) and the anti-vibration rubber (e) are absorbed to ensure soundproof performance.

In the case of this conventional soundproof floor having a double floor structure, a support leg (d) and a vibration-proof rubber (e) arranged so as to contact the floor base surface (f) at a plurality of points. A plurality of floor panel base members each having a predetermined size are laid so as to be adjacent to each other to form a floor surface.

[0005]

However, in the conventional example as described above, the base units of a plurality of adjacent floor panels are individually arranged so as to ensure their respective horizontal levels. The height of the support leg (d) had to be finely adjusted, and such an adjustment was not easy and was a very laborious task.

In order to save such troublesome work for ensuring such levelness, it is conceivable to use joists used for the conventional construction method of a detached house on the floor surface. However, since the joist construction method in which the surface finishing material (s) is placed on the joist (shi) supported by the haiki (sa) as used in this conventional construction method is inferior in soundproofing performance. There was a problem that it could not be used for an apartment house.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a soundproof floor structure capable of obtaining high soundproof performance and having good workability.

[0008]

In order to achieve the above object, in the present invention, a composite floor material A is arranged on the joist 2 and
In the soundproof double floor structure in which the support leg 3 and the vibration-proof rubber 4 are installed under the joist 2 in contact with the floor base surface 5, the composite floor material A is placed on the joist 2 with the vibration-damping sheet 17 interposed. It is characterized by having done.

Further, the composite flooring material A may be constructed by interposing a foam sheet 19 between the surface finishing material 1 and the base material 18. Further, the sound absorbing material 9 may be arranged in the space 8 between the floor base surface 5 below the composite floor material A.

[0010]

Thus, a double floor structure is formed by arranging the support legs 3 and the anti-vibration rubber 4, and the composite floor material A is supported by the joists 2, and the vibration damping sheet 17 is placed on the joists 2. By mounting the composite floor material A with the interposition therebetween, it is possible to easily secure the levelness of the floor surface with the joist 2 as well as the high soundproof performance, and it is possible to improve the workability.

Further, by constructing the composite flooring material A with the foam sheet 19 interposed between the surface finishing material 1 and the base material 18, the soundproofing performance of the composite flooring material A alone can be further improved. In addition, the space 8 between the floor base surface 5 below the composite floor material A
The soundproofing performance can also be improved by disposing the sound absorbing material 9 in the.

[0012]

The present invention will be described below in detail based on the illustrated embodiments. Example 1 FIG. 1 shows an example of the present invention.
Is placed on the joist 2, the support leg 3 and the vibration-proof rubber 4 are arranged below the joist 2, and the vibration-proof rubber 4 is in contact with the floor base surface 5.

FIG. 3 shows the installation condition of the joist 2.
Support legs 3 are installed at appropriate positions on the lower surface side of the joist 2.
The joists 2 are erected between the opposing wall surfaces 13,
It is installed between the opposing wall surfaces 13 so that the end portions are placed on the joists 15 provided on the upper part of the bundle 14 arranged along the wall surface 13. As a procedure for installing the joist 2, first, as shown in FIG. 3 (a), the support leg 3 is installed on the joist 2, and then as shown in FIG. The joist 2 is placed between the opposing wall surfaces 13 in a state of being floated from the floor base surface 5 by being nailed and fixed by nailing, and then the height of the supporting leg 3 in the central portion is adjusted by using the level 16. Leveling is performed, and the height of each support leg 3 is adjusted as shown in FIG. 3 (c) so that the rubber vibration isolator 4 is grounded to the floor base surface 5 and is accurately installed without tilting. Is.

As shown in FIG. 4, the support leg has a support nut 11 screwed onto a threaded portion 10a of the support bolt 10, and a vibration-proof rubber 4 is installed below the support bolt 10. The height dimension of the support leg 3 can be freely adjusted according to the use situation by adjusting the screwing depth of the threaded portion 10a of the upper portion of the support bolt 10 with respect to.

The joist 2 on which the support leg 3 is installed is provided with a through hole 12 so as to penetrate the front and back, and the support nut 11 is inserted into the through hole 12. Support nut 11
A contact piece 11a is provided in the lower portion of the contact piece 11a. The contact piece 11a is brought into contact with the lower opening edge of the through hole 12 and the support nut 11 is inserted into the through hole 12 so that the joist 2
Mounted on In the case shown in FIG. 4A, the contact piece 11a provided at the lower end of the support nut 11 is used.
4A is attached to the joist 2 by abutting the lower opening edge of the through hole 12 and inserting the support nut 11 into the through hole 12, which is shown in FIG. 4B. In the figure, the contact piece 11a is fixed to the lower surface of the joist 2 with a screw. By adopting the structure in which the support nut 11 is inserted and arranged in the through hole 12 provided in the joist 2 as described above, the movement amount of the support bolt 10 at the time of adjusting the unevenness can be increased by the thickness of the joist 2. Therefore, the height adjustment width of the support leg 3 can be made large. Also, by inserting a tool such as a screwdriver from above the through hole 12, the joist 2
The height of the support leg 3 can be adjusted by rotating the support bolt 10 from above, and the level can be easily adjusted. That is, as shown in FIG. 7, in the structure in which the upper end of the support nut 11 is brought into contact with the lower surface of the joist 2 and the receiving piece 11b is attached to the lower surface of the joist 2, the height of the support nut 11 is increased. The height of the support leg 3 can be adjusted only within the range of the size.

The material of the joist 2 is not particularly limited, and may be wood, LVL, vinyl chloride resin or the like. As the above-mentioned composite floor material A, the intermediate plywood 18a as the base material 18 is laminated and arranged on the vibration damping sheet 17 placed on the joist 2, and the foamed sheet 19 is laminated and arranged on the intermediate plywood 18a. Then, the surface decorative plywood 20 as the surface finishing material 1 is laminated and arranged on the foamed sheet 19. In this way, when the composite floor material A is configured by sequentially arranging the vibration damping sheet 17, the intermediate plywood 18a, the foamed sheet 19, and the surface decorative plywood 20 in layers, the composite floor material A alone has high soundproof performance. Can be one.

As the vibration damping sheet 17, natural rubber, SB
It is composed of a rubber foam sheet such as R and a resin foam sheet such as urethane and polyethylene. Also, damping sheet 1
7 is made of a soft vinyl chloride sheet, a rubber asphalt sheet, or the like. Then, the soundproofing performance is improved by the vibration damping rubber 4 and the air layer below the composite floor A,
Moreover, since the support leg 3 and the vibration-proof rubber 4 are installed on the vibration-damping sheet 17 below the joist 2, the shock-damping effect can be improved and the vibration-damping sheet 17 suppresses the vibration of the surface finish material 1. The effect can be improved, and also in this respect, the soundproof performance can be enhanced.

Regarding the structural example of Embodiment 1 in FIG. 1,
The double floor without the joist construction method as Comparative Example 1 shown in FIG. 8A, the joist structure floor as Comparative Example 2 shown in FIG. 8B, and the comparison shown in FIG. 8C. Using the joisting method as Example 3, the soundproofing performance is evaluated in the case where the floor pocket (H) is 150 mm in comparison with a double flooring having one surface finishing material 26, as shown in Table 1. In Example 1, the performance is almost equivalent to that of the double floor without the joisting method as Comparative Example 1, and the joisted construction floor as Comparative Example 2 and the joisting method as Comparative Example 3 are used. It can be seen that far superior soundproofing performance can be obtained as compared to the case of the double floor without using wood. That is, it is possible to adopt the joist construction method, to easily secure the levelness of the floor construction, and to improve the workability, and to obtain high soundproof performance. In FIG. 8, reference numeral 26 is a surface finish material, 20 is a laminating board, 21 is a particle board, 22 is a support bolt, 23 is a vibration-proof rubber, 24 is a joist, and 25 is a haul.

[0019]

[Table 1]

Example 2 As shown in FIG. 2, this is a space 8 between the floor sheet 5 and the bottom of the damping sheet 17 in Example 1 described above.
The sound-absorbing material 9 is arranged at the position. As the sound absorbing material 9, a suitable material such as a known material made of glass wool, rock wool or other materials is used.

As shown in Table 1, this one also has almost the same performance as the double floor without the joisting method as the comparative example 1, and the joisted floor as the comparative example 2 and the comparative example 3 have the same performance. It can be seen that although the joist method is used, the sound insulation performance is far superior to that of the double floor without the panel material. That is, it is possible to adopt the joist construction method, to easily secure the levelness of the floor construction, and to improve the workability, and to obtain high soundproof performance.

5 and 6 show the difference in sound absorbing effect between the case where rock wool having a weight of 25 kg is used as the sound absorbing material 9 and the case where glass wool having a weight of 10 kg is used.
FIG. 5 shows the difference in light weight impact, and FIG. 6 shows the difference in weight impact. ● in the figure indicates rock wool,
○ indicates glass wool.

[0023]

EFFECT OF THE INVENTION The present invention provides a soundproof double floor structure in which a composite floor material is arranged on the upper part of the joist, and a supporting leg and a vibration-proof rubber are installed on the lower part of the joist in contact with the floor base surface. Since the composite floor material is placed with the vibration damping sheet interposed, it is possible to easily secure the levelness of the floor surface with joists. Also, the presence of the vibration damping sheet makes it possible to reduce the impact. It is possible to improve the vibration suppressing effect, and it is possible to obtain a high soundproofing performance and to provide a soundproofing floor structure having good workability.

Further, by constructing the composite flooring material with the foam sheet interposed between the surface finishing material and the base material, the soundproofing performance of the composite flooring material alone can be further improved.
Further, the soundproofing performance can be improved by disposing the sound absorbing material in the space between the floor base surface under the composite floor material.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment.

3 (a), (b), and (c) are cross-sectional views showing installation conditions of joists.

4 (a) and 4 (b) are cross-sectional views showing each embodiment of the installation state of the support leg.

FIG. 5 is a graph showing lightweight impact.

FIG. 6 is a graph showing weight impact.

7 (a) and 7 (b) are cross-sectional views showing a conventional example in which the support legs are installed.

8A is a cross-sectional view showing Comparative Example 1 in Table 1, FIG.
(B) is a sectional view showing Comparative Example 2 in Table 1, and (c) is a sectional view showing Comparative Example 3 in Table 1.

FIG. 9 is a cross-sectional view showing a double floor structure in a conventional example.

FIG. 10 is a cross-sectional view showing a joist floor structure in a conventional example.

[Explanation of symbols]

 A composite floor material 1 surface finishing material 2 joist 3 support legs 4 anti-vibration rubber 5 floor base surface 8 space 9 sound absorbing material 17 damping sheet 18 base material 19 foam sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazunori Umeoka 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (3)

[Claims] 1. In a soundproof double-floor structure in which a composite floor material is arranged on an upper part of the joist, and a supporting leg and a vibration-proof rubber are installed on the lower part of the joist in contact with a floor base surface, a damping sheet is provided on the joist. A soundproof double-floor structure characterized by being installed with a composite floor material interposed. 2. The soundproof double-floor structure according to claim 1, wherein the composite floor material is constituted by interposing a foam sheet between the surface finishing material and the base material. 3. The soundproof double floor structure according to claim 1 or 2, wherein a sound absorbing material is arranged in a space between the lower floor of the composite floor material and the floor base surface.