JPS5818492B2 - Sound absorbing board for interior - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound absorbing board used for the interior of buildings and automobiles.

Since fiber mats have good sound absorption and heat insulation effects, they have been widely used as ceiling panels and wall panels in buildings, and have also been used as interior materials for automobiles.

However, since the above-mentioned various interior materials are required to have a certain degree of strength, when forming the fiber mat into a plate shape, it is necessary to increase the compression ratio to make it dense.

It is well known that when the density is increased in this way, the sound absorption and heat insulation effects decrease.

Taking the above points into consideration, the present inventor conducted various studies to find out whether it is possible to make fiberboard with high density, have sufficient strength, and obtain the same sound absorption and heat insulation effects as low density materials. By providing a surface layer on the surface and providing an arbitrary number of recesses forming independent air chambers on the back surface of the fiberboard, it is possible to obtain a sound absorbing board that improves sound absorption and heat insulation effects due to the air chambers and has sufficient strength. This is what was discovered and proposed as the present invention.

The structure of the present invention will be explained in detail based on the first embodiment shown in FIG.
A facing layer 2 is provided on the surface of the fiberboard 1, a large number of recesses 3 are provided in arbitrary shapes at appropriate intervals on the back surface, the inside of the recesses 3 is used as an air chamber 4, and the back surface of the fiberboard 1 is fixed to the board material 5 of the building. , the air chamber 4 is sealed.

For the fiberboard 1 used in the above embodiments, glass wool, rock wool, matte coarse felt made of slag, etc. can be used as fibers, and 10 to 20 kg/rye of mat is used as the raw material, and this is 20 to 500 yu/7F+" It is appropriate to press-mold the material to preferably have a size of 50 to 500 m3.

The surface layer 2 may be formed by applying paint to the surface of the fiberboard 1, or may be formed by spinning a woven fabric, a knitted fabric, or a fiber into a cotton shape, arranging them in parallel and stitch-bonding them (hereinafter referred to as cloth). ) may be attached.

In addition, when pasting the cloth, after forming the fiberboard 1 by pressing the fiber mat with a mold so as to form the concave portions 3, it may be pasted using an adhesive, or the cloth may be pasted using an adhesive. By placing a plastic film, placing a cloth on top of it, pressing it with a pressure of about 3 kg/crii, and heating it at a temperature of 450 to 250°C for 1 to 10 minutes,
A method may also be used in which the fiberboard 1 having the recesses 3 is molded and at the same time a plastic film is melted and bonded to the fiberboard 1 (G).

In this case, it goes without saying that a material must be used that can withstand the heating during molding.

Also, when fixing to the plate material 5, adhesive may be used,
You can also drive nails into several places.

The first embodiment of the present invention is constructed as described above, and the fiberboard 1 has the same sound-absorbing and heat-insulating effect as the conventional one, and the air chamber 4 can absorb incident sound waves. In addition, the sound waves incident on the air chamber 4 are dispersed to the surroundings and are effectively absorbed by the surrounding fiberboard 1, so that the sound absorption and heat insulation effects can be improved.

Note that even if there is a gap in the board material 5, the sound insulation effect of the air chamber 4 that hits the gap will be reduced, but since the other air chambers 4 are independent, the sound insulation, sound absorption, and heat insulation effects may be reduced. Never.

Further, since a large number of recesses 3 are provided on the back surface, when fixing to the plate material 5, even if the plate material 5 is formed with a slightly uneven surface, it can be firmly fixed by adhesive or the like.

Although the wall thickness of the fourth part 3 is thinner, this part has sufficient strength because it is molded with higher density than other parts.

Next, the second embodiment will be explained based on FIG. 2. In the second embodiment, when forming the concave portion 3 on the back surface of the fiberboard 1, the protrusion portion 6 is formed by raising the four portions 3 on the surface. This is what I did.

Providing the facing layer 2 on the surface of the fiberboard 1 is the same as in the first embodiment.

Then, a mounting plate 7 made of insulation board, birdboard, gypsum board, etc. is attached to the back surface of the fiberboard 1 to seal the air chamber 4.

This mounting plate 7 is fixed to a board 5 of a building.

Incidentally, the mounting plate T is provided with a tongue and groove on its outer circumferential surface so that it can be easily connected.

In the second embodiment, the structure of the facing layer 2 and the molding of the fiberboard 1 are the same as in the first embodiment.

In the second embodiment, the protrusions 6 are raised on the surface to form the recesses 3, so the fiberboard 1 is formed thicker to form the recesses 3 as in the first embodiment. Since it is not necessary, it can be formed thinly, and the protrusion and the rising portion of the scale 6 serve as reinforcement, and it can be made strong and lightweight.

Moreover, since it is lined with the mounting plate 7, the air chamber 4 is reliably formed in an independent state, and even if there is a gap etc. in the plate material 5 that fixes the mounting plate 7, sound waves can be sufficiently absorbed. It has good sound absorption, heat insulation, and sound insulation effects.

Further, since a pattern is formed on the surface layer 2 by the protrusions 6, by providing the protrusions 6 of various shapes, a beautiful pattern can be expressed and a design effect can be effectively obtained.

As mentioned above, the second embodiment has effects that the first embodiment does not have, and other effects similar to those of the first embodiment can be obtained.

The fiberboard 1 of the first embodiment may be lined with the mounting plate 7, or the fiberboard 1 of the second embodiment may be fixed to the board 5 or the like without being lined with the mounting plate 7.

Further, in both of the above embodiments, the case where the invention was applied to a building was explained, but the invention can be similarly applied to an interior material of an automobile.

Note that the size of each recess in the first and second embodiments is reduced by 1.
0 to 200d, the depth is about 3X or more, and the area occupied by the recess is preferably 50% or more of the total area, preferably 70% or more, and the fiberboard 1 and mounting plate 7 of the second embodiment By interposing a relatively low-density fiberboard with uniform thickness between the two, heat insulation and sound absorption properties can be further improved.

[Brief explanation of drawings]

The figures show embodiments of the sound absorbing board for interior use according to the present invention, and FIG. 1 is a cross-sectional view of the first embodiment, and FIG. 2 is a cross-sectional view of the second embodiment. In the figure, 1 is a fiberboard, 3 is a recess, 4 is an air chamber, 6 is a protrusion, and 7 is a mounting plate.

Claims (1)

[Claims] 1. Sound absorption for interior use, characterized in that a number of recesses 3 forming independent air chambers 4 are provided on the back surface of the fiber board 1, and a facing layer 2 is provided on the surface of the fiber board 1. Board. 2. A large number of recesses 3 forming independent air chambers 4 are provided on the back surface of the fiberboard 1, and protrusions 6 are provided by protruding the portions where the recesses 3 are provided on the surface, and a facing layer 2 is further provided on the entire surface. A sound absorbing board for interior use featuring the following.