JPH07197632A - Soundproof flooring - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a soundproof flooring material that can achieve higher sound insulation performance than ever before by only performing the same construction as before without complicating construction on site. [Structure] For flooring materials used in general wooden houses, steel-framed houses, etc., a wooden board (Triwood) having a structure in which medium density fiber board (MDF) and strand board are integrated as a base material is used. A soundproof flooring material characterized by:

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flooring material used for general houses and the like.

[0002]

2. Description of the Related Art In general wooden houses, steel-framed houses, etc., there are many gaps and lack of airtightness, and the specific gravity and rigidity of wood are not sufficient. , Not only floor impact sound such as person's falling sound,
Airborne sounds such as second-speaking voices, sounds generated by audio equipment, and musical sounds of musical instruments were easily transmitted downstairs, and the sound insulation performance was generally poor.

Therefore, as shown in FIG. 5, in order to improve the sound insulation performance, the base plywood (3) and the high specific gravity substance are mixed between the floor material (1) and the joists (2) to improve the sound insulation performance. A method of attaching an improved sound insulation sheet (4) having a thickness of about 1 to 3 mm has also been devised, but it is mainly to improve the airborne sound, and the sound insulation performance for floor impact sound is improved only slightly. It was In addition, since these are separately constructed, there is a drawback that the number of on-site construction processes is significantly increased.

Therefore, in order to further improve the sound insulation performance, a sound insulation sheet (4) is further installed on the back surface of the ceiling plate (5), or the ceiling is hung with a vibration-proof rubber. There was also an example of improving.

However, in the case of a ceiling, in particular, the weight of the ceiling itself increases. Therefore, in order to prevent the ceiling from hanging down, it is necessary to strengthen the hanging tree, which further increases the number of steps during construction. In addition, since such a construction is performed with the user facing up in a high place, it is actually difficult to use a heavy material such as a sound insulating sheet that does not have a heavy weight.

Therefore, by applying the technology for improving the floor impact sound insulation performance of the sound insulation floor material directly pasted in an apartment house of concrete construction, the cross-section structure of the floor material is improved and the floor material is not used. By layering itself, a flooring material was developed aiming at improving floor impact sound insulation performance and workability.

As shown in FIG. 6, the plywood is composed of two layers of an upper plywood (6) for adhering a decorative veneer and a lower plywood (7) which is responsible for the strength of a floor material. The cushioning material (8) made of the above foam was installed to improve the lightweight floor impact sound insulation performance.

Another example has been devised in which the sound insulating sheet (4) is previously bonded and integrated to the back surface of the lower plywood (7) to omit the construction of the sound insulating sheet on site. In this case, the floor material itself can be constructed by nailing as in the conventional floor material.

However, since the plywood using Lauan was used as the base material, there was a problem in raw material supply due to the recent exhaustion of resources of South Sea lumber, and plywood due to the low specific gravity of Lauan. In that case, the specific gravity is about 0.5, and the sound insulation performance is inferior.

Further, in order to increase the specific gravity of the base material, use of a medium specific gravity fiberboard (MDF), particle board, etc. can be considered, but all of them are usually used 303 mm (1 shaku).
The flooring material to be installed on the joists in the space is slightly insufficient in strength, and in order to compensate for this, the thickness of the flooring material base is 20
It had to be thicker than 10 mm, and it was difficult to obtain a practical floor because of the accommodation with the sill and other construction materials.

[0011]

Therefore, the present invention is
The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional example, and to provide a soundproof floor material that can obtain higher sound insulation performance than before by only the same construction as before without complicating construction on site. The purpose is to

[0012]

The soundproof flooring material of the present invention comprises:
For floor materials used in general wooden houses, steel-framed houses, etc., it is recommended to use wood boards (Tri-wood) having a structure in which medium specific gravity fiber board (MDF) and strand board are integrated as a base material. Characterize.

Further, a plywood to which a decorative veneer is adhered or a wood board such as a medium density fiber board (MDF) is subjected to a soft cushioning material such as rubber, polyethylene foam, urethane foam or the like, and the above-mentioned medium density fiber board (MDF). ) And a strand board are integrally bonded to a wooden board (triwood) having a structure.

Further, the specific gravity of 1.2 to
The feature is that a flexible, high specific gravity sound insulation sheet of about 2.3 is bonded and integrated.

[0015]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the floor structure of the present invention, and FIGS. 2 to 4 are graphs of test data showing the effect of the present invention. However, FIG. 2 shows a comparison of the transmission loss, FIG. 3 shows a comparison of the lightweight floor impact sound levels, and FIG. 4 shows a comparison of the lightweight floor impact sound levels of the soundproof floor material having a similar structure. There is.

As shown in FIG. 1, the soundproof flooring material of this invention is
At first glance, it is similar to the conventional soundproofing floor material, but differs in the following points.

First, as the lower wood board (9), a medium specific gravity fiber board (MDF) integrated strand board (Triwood) having a specific gravity of 0.7 or more is used. This has a feature that the surface density, which is the weight per unit area, is higher than that of the Lauan plywood having a specific gravity of 0.6 or less, which is used in a conventional soundproof flooring material, and the sound insulating property is excellent.

Secondly, a cushioning material (11) made of resin foam is sandwiched between the upper wood board (10) and the lower wood board (9). As a result, the surface of the flooring material becomes moderately flexible, and it is effective in reducing the light-weight floor impact sound insulation performance of the floor impact sound.

Thirdly, when a higher sound insulation performance is required, the specific gravity of 1.2 to
A flexible sound insulation sheet (4 ') of about 2.3 is bonded and integrated. As a result, the medium density fiberboard (MDF) integrated strand board (Triwood) used as the base material has a vibration damping effect, and the increase of the areal density further improves the sound insulation performance. is there.

The test values of the above examples are shown below.

FIG. 2 shows transmission loss test values in a test room when no ceiling is installed. Here, the conventional 12m
5 for non-soundproof flooring (12) using lauan plywood
The transmission loss of 18 decibels at 00 hertz is 24 decibels at 500 hertz in the flooring (13) of the present invention.
An improvement of 6 dB in transmission loss is observed.

Further, the improvement of the transmission loss is recognized over the entire range from the low frequency range to the wide frequency range, and although there is a difference depending on the frequency, in the range of 125 hertz to 4000 hertz, the average of 3 to 7 decibels is averaged. An improvement effect of 6 dB was observed.

Next, FIG. 3 shows the improvement of the lightweight floor impact sound insulation performance in the test room when the ceiling is not installed. Again, in the conventional floor material (12) having a non-soundproof structure using 12 mm lauan plywood, the lightweight floor impact sound level is 103 decibels at 500 Hertz, whereas the floor material (1
In 3), an improvement of 89 decibels and 14 decibels at 500 Hz is recognized.

Further, FIG. 4 shows a comparison of lightweight floor impact sound insulation performance between a conventional soundproof flooring material (14) using lauan plywood and a soundproofing floor material (15) of the present invention using triwood.

According to this, in the case of the conventional soundproofing floor material (14) using lauan plywood, the soundproofing floor material (15) of the present invention is used.
And the cross-sectional structure is almost similar. In both cases, a cushioning material made of resin foam is sandwiched between the upper and lower wooden boards, but since the base material is Lauan plywood with a thickness of 12 mm, the specific gravity is The soundproof flooring material (15) of the present invention has a surface density of 0.55 and an area density of 6.6 kilograms per square centimeter.
Has a specific gravity of 0.70 and an areal density of 10.5 kilograms per square centimeter. It is fully estimated that this difference is a difference in transmission loss, but it also appears as a difference in lightweight floor impact sound insulation performance.

[0027]

EFFECTS OF THE INVENTION The present invention has the above-mentioned structure. The triwood has the following effects because the medium specific gravity fiber board (MDF) and the strand board are completely integrated at the time of manufacturing. .

Since Triwood can have a specific gravity of 0.7, it is possible to obtain a high sound insulation performance which cannot be obtained by a conventional plywood having a low specific gravity of 0.6 or less using Lauan.

The reason for this is considered to be that the high specific gravity of the wood board located in the lower part increases the weight per unit area, that is, the surface density, and enables effective sound insulation.

Since all the structures required for sound insulation are provided in the flooring material, it is possible to use the same flooring material without soundproofing as the conventional flooring material without the need for complicated construction work like the conventional flooring material. A floor with high sound insulation performance can be easily obtained by the construction method.

In Triwood, since the veneer of the strand board portion is thinner than in the case of plywood and arranged randomly, an extremely tough fruit is formed when actual processing is performed, so cracks occur during construction. It is difficult to do and there is no fear of squeaking after construction.

Triwood can be used as a raw material for production, and any kind of wood such as low-quality wood, construction waste wood, and thinned wood can be used, so there is no problem in resource supply. Moreover, since the yield at the time of manufacture is good, the price is lower than that of plywood.

Triwood is a medium density fiberboard (MDF)
It's stronger than particle boards, so if you need the same strength, you can make it thinner, so
The product thickness can be kept within a practical range.

[Brief description of drawings]

FIG. 1 is a sectional view showing a floor structure of the present invention.

FIG. 2 is test data showing the effect of the present invention, in which the transmission loss is compared.

FIG. 3 is test data showing the effect of the present invention, in which lightweight floor impact sound levels are compared.

FIG. 4 is test data showing the effect of the present invention, and a comparison of light-weight floor impact sound levels of soundproof flooring materials having a similar structure is performed.

FIG. 5 is a sectional view showing a conventional floor structure, showing a separation type.

FIG. 6 is a sectional view showing a conventional floor structure, showing an integrated type.

[Explanation of symbols] 1 floor material 2 joist 3 base plywood 4 sound insulation sheet 4'flexible sound insulation sheet 5 ceiling board 6 upper plywood 7 lower plywood 8 cushioning material 9 lower wood board (triwood) 10 upper wood board 11 cushioning material 12 Floor material of non-soundproof structure 13 Floor material of the present invention 14 Soundproof floor material using lauan plywood 15 Soundproof floor material of the present invention using triwood

Claims (3)

[Claims] 1. In a flooring material used for general wooden houses, steel-framed houses, etc., a wood board (triwood) having a structure in which a medium specific gravity fiber board (MDF) and a strand board are integrated into a base material. A soundproof flooring material characterized by using. 2. A specific gravity of 1.2 to 2.
The soundproofing flooring material according to claim 1, wherein a flexible sound insulating sheet having a high specific gravity of about 3 is integrally bonded. 3. A medium-density fiberboard (MDF) as described above, wherein a wood board such as a plywood or a medium-density fiber board (MDF) to which a decorative veneer is adhered, through a soft cushioning material such as rubber, polyethylene foam or urethane foam. ) And a strand board are integrated into a wooden board (tri-wood), which is integrally bonded to a soundproof flooring material.