JP2831339B2 - Sound absorbing members for building structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing member for a building structure, and more particularly, to a sound absorbing member provided on a ceiling surface or a wall surface of the building structure.

[0002]

2. Description of the Related Art Conventionally, as a sound absorbing member, measures against traffic noise accompanying an increase in traffic volume and an increase in size of a vehicle have been strongly demanded. . As shown in FIG. 5, the sound absorbing member for a soundproof wall is
A surface plate 102 made of a metal plate having a louver structure subjected to rust prevention treatment, a sound absorbing material 103 made of an inorganic fiber such as glass wool whose surface is covered with a synthetic resin film 104, and a space 106 provided at the back of the sound absorbing member 103. A back plate 105 made of a metal plate material provided with a rust-proof treatment, and a space 106
Frame member 10 made of a metal plate material treated to prevent rust
The unit block 101 is constructed by inserting and fixing the unit block 101 to a post made of rust-proofed H-shaped steel or the like, or by directly fixing it to the side wall made of concrete to form a soundproof wall. I have to.

[0003]

As described above, various high-performance sound absorbing members for soundproof walls have been put to practical use, while sound absorbing members provided on the ceiling surface or wall surface of a building structure. Although various shapes using various materials have been proposed, there is no sound absorbing member that can effectively absorb noise and noise in building structures, etc., and is also excellent in design, Its practical use has been demanded. In particular, a sound absorbing material made of inorganic fibers such as glass wool, which is often used for sound absorbing members for soundproof walls, has excellent sound absorbing properties,
Because it is difficult to color, when using a metal plate material having a large number of through holes such as expanded metal or punching metal on the surface plate, it is difficult to give the through holes a color that is in harmony with the surroundings. In addition, it has not been used as a sound absorbing member disposed on the ceiling surface or wall surface of a building structure.

[0004] In order to meet the above demand, the present invention uses a sound absorbing material made of an inorganic fiber such as glass wool having excellent sound absorbing properties, and can effectively absorb noise and noise inside a building structure. It is another object of the present invention to provide a sound absorbing member for a building structure which is excellent in design.

[0005]

In order to achieve the above object, a sound absorbing member of a building structure according to the present invention is formed in a box-shaped main body having an open upper surface and a dome shape attached to an opening of the main body. A surface plate having a large number of through-holes, a sound-absorbing material made of inorganic fibers whose surface filled in the main body is covered with a synthetic resin film, and a synthetic fiber nonwoven fabric mat disposed between the surface plate and the sound-absorbing material It is characterized by the following.

The sound absorbing member of the building structure of the present invention has a dome-shaped surface plate having a large number of through holes.
Since the incidence rate of noise can be increased, and a synthetic fiber nonwoven fabric mat is placed between the surface plate and the sound absorbing material,
In addition to protecting the sound absorbing material made of inorganic fibers whose surface is covered with a synthetic resin film, the synthetic fibers used for the synthetic fiber nonwoven fabric mat are easy to be colored. The colors can be applied in harmony with the colors.

In this case, it is possible to form a large number of projections on at least the side of the synthetic fiber nonwoven fabric mat facing the sound absorbing material, or to form a large number of projections on the side of the sound absorbing material facing the synthetic fiber nonwoven fabric mat. it can.

[0008] Thus, the sound absorbing effect of the boundary surface of the synthetic resin nonwoven fabric mat and the synthetic resin film covering the surface of the sound absorbing material or the boundary surface of the synthetic resin film and the sound absorbing material and the synthetic resin film itself can be expected, and the sound absorbing performance of the sound absorbing member. Can be improved.

Also, a space may be formed on the back of the sound absorbing material,
The sound absorbing material may be configured in a layered manner, and the sound absorbing material layer located on the noise incident side may be configured to have a lower density than the sound absorbing material layer on the back side thereof.

As a result, noise in a wide range of frequencies can be efficiently reduced. In particular, by forming the sound absorbing material layer located on the noise incident side at a lower density than the sound absorbing material layer on the back side thereof, The noise reduction effect of a wide range of frequencies can be obtained while increasing the incidence rate of the noise.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the sound absorbing member of a building structure according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of a sound absorbing member of a building structure according to the present invention. This sound-absorbing member is formed in a box-shaped main body 1 having an open top surface and a dome shape attached to the opening of the main body 1 by forming a planar shape into a square or a rectangular rectangle close to a square, and forming a large number of through holes. Surface plate 2 and body 1
It comprises a sound absorbing material 5 made of inorganic fiber such as glass wool whose surface is filled with a synthetic resin film 4 and a synthetic fiber nonwoven fabric mat 3 disposed between the surface plate 2 and the sound absorbing material 5.

The box-shaped main body 1 is made of a metal plate or a synthetic resin molded article which has been rust-proofed and decorated with aluminum, stainless steel, plating or the like. In this case, the size of the box-shaped main body 1 is not particularly limited, but the length L of one side is 30 to 100 cm,
More preferably, it is formed to a thickness of about 40 to 60 cm.

The dome-shaped surface plate 2 is made of an expanded metal, a punched metal, made of aluminum, stainless steel, or plated or rustproofed.
It is composed of a louver structure or a synthetic resin molded body. In this case, the shape of the dome shape of the surface plate 2 is not particularly limited. However, in accordance with the shape of the box-shaped main body 1, when the plane shape of the main body 1 is square, the plane shape is circular. When the planar shape of the main body 1 is rectangular, it is preferable that the planar shape be elliptical and formed so as to swell over the entire main body 1. Further, the height H of the dome shape of the surface plate 2 is not particularly limited, but the diameter of the dome shape, that is, 10 to 30% of the length L of one side of the main body 1,
More preferably, it is formed to about 20%.

As shown in detail in FIG. 3, the synthetic fiber non-woven fabric mat 3 is formed by entanglement of synthetic resin fibers, for example, polyvinylidene chloride fibers, and integrally binding them with a bridging agent made of an appropriate synthetic resin material. In this case, a large number of convex portions 3a, specifically, high portions, are formed on the side facing the synthetic resin film 4 covering at least the sound absorbing material 5 during the heat molding. 3-10m
It is desirable to form about m convex portions. In this case, the synthetic fiber nonwoven fabric mat 3 can be colored together with the surface plate 2 so that the soundproof member has a color that is in harmony with the surroundings. In addition, the shape of the convex portion 3a is not limited to the circular convex portion of the present embodiment, and for example, the shape and height thereof can be arbitrarily set, such as forming a vertical or horizontal band. .

The synthetic resin film 4 covering the surface of the sound absorbing material 5 for preventing the scattering of the inorganic fibers constituting the sound absorbing material 5 is made of a synthetic resin film such as polyvinyl fluoride.

As shown in detail in FIG. 4, the sound absorbing material 5 is made of a block formed by integrally molding glass wool. In this case, the sound absorbing material 5 is formed on the side facing the synthetic fiber nonwoven fabric mat 3 at the time of molding. It is desirable to form a large number of convex portions 5a, specifically, convex portions having a height of about 3 to 10 mm. In this case, the sound-absorbing material 5 can form a dome-shaped space 6 on the back surface, thereby reducing the usage of the sound-absorbing material without deteriorating the sound absorbing performance. In addition, the shape of the convex portion 5a is not limited to the circular convex portion of the present embodiment, and for example, the shape and height thereof can be arbitrarily set, such as forming a vertical or horizontal band. . In addition, the sound absorbing material 5 is formed in a layer shape, and the sound absorbing material layer 51 located on the noise incident side is formed to have a lower density than the sound absorbing material layer 52 on the back side thereof (for example, the density of the glass wool of the sound absorbing material layer 51 is 32 kg). / M ³ , and the density of the glass wool of the sound absorbing material layer 52 is 48 kg / m ^3. ), Whereby noise in a wide range of frequencies can be efficiently reduced.

By the way, a large number of convex portions 5 are formed on the surface as described above.
As a method of manufacturing the sound absorbing material 5 made of the inorganic fiber having the a formed thereon, a molding die having a concave portion at a position corresponding to the convex portion 5a is used. After filling the mold with uncured inorganic fibers at a predetermined pressure, the mold is heated from the outside, or hot air is supplied into the mold to cure the resin binder added to the inorganic fibers, In addition to a method of obtaining a sound absorbing material made of an inorganic fiber having a required shape, a protrusion 5a
The uncured inorganic fibers are filled in a mold having a through hole at a position corresponding to the above, and the inorganic fibers are sucked from the outside of the mold through the through holes of the mold to form the projections 5a and then harden. According to the latter method, the inorganic fibers around the convex portion 5a are not compressed, so that the surface of the sound absorbing material 5 on which the large number of convex portions 5a are formed becomes a noise incident surface. , The noise absorption rate does not decrease.

The above sound absorbing member is used as a sound absorbing member of a building structure by directly arranging it on a ceiling surface or a wall surface of a building structure made of concrete or the like with a bolt, an adhesive or the like. Since it has weather resistance, it can be used by arranging it on the ceiling surface or wall surface of an outdoor building structure according to this.

[0020]

According to the sound absorbing member for a building structure of the present invention, since the surface plate having a large number of through holes is formed in a dome shape, the incidence rate of noise can be increased. Since the synthetic fiber nonwoven fabric mat is disposed between the synthetic fiber nonwoven fabric mat and the sound absorbing material, the synthetic fiber used for the synthetic fiber nonwoven fabric mat is colored while protecting the sound absorbing material made of inorganic fibers whose surface is covered with a synthetic resin film. Since this is easy, the soundproof member can be given a color that is in harmony with the surroundings, together with the surface plate. For this reason, in combination with the use of a sound absorbing material made of inorganic fibers such as glass wool having excellent sound absorbing properties, it is possible to effectively absorb noise and noise in building structures, etc. It is also excellent.

Also, by forming a large number of convex portions on at least the side of the synthetic fiber nonwoven fabric mat facing the sound absorbing material, or by forming a large number of convex portions on the side of the sound absorbing material facing the synthetic fiber nonwoven fabric mat, It is possible to expect a sound absorbing effect at the boundary between the synthetic resin film covering the surface of the fiber nonwoven fabric mat and the sound absorbing material or at the boundary between the synthetic resin film and the sound absorbing material and the synthetic resin film itself, thereby further improving the sound absorbing performance of the sound absorbing member. .

Also, a space may be formed on the back of the sound absorbing material,
By configuring the sound absorbing material in a layered form, and by configuring the sound absorbing material layer located on the noise incident side to be lower in density than the sound absorbing material layer on the back side thereof, it is possible to efficiently reduce noise in a wide range of frequencies, particularly By configuring the sound absorbing material layer located on the noise incident side at a lower density than the sound absorbing material layer on the back side thereof, it is possible to obtain the effect of reducing noise in a wide range of frequencies while increasing the noise incidence rate.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a sound absorbing member of a building structure according to the present invention, wherein (a) is a plan view and (b) is a side view.

FIG. 2 is a sectional view taken along line AA of FIG.

3A and 3B show a synthetic fiber nonwoven fabric mat, wherein FIG. 3A is a plan view and FIG. 3B is a sectional view taken along line BB of FIG.

4A and 4B show a sound absorbing material, wherein FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view taken along line CC of FIG.

FIG. 5 is a cross-sectional view showing the structure of a conventional sound absorbing member for a soundproof wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Surface board 3 Synthetic fiber nonwoven fabric mat 3a Convex part 4 Synthetic resin film 5 Sound absorbing material 5a Convex part 6 Space

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/82 E04B 1/86 G10K 11/172

Claims (5)

(57) [Claims] 1. A box-shaped main body having an open upper surface, a surface plate formed in a dome shape attached to an opening of the main body and having a number of through holes, and a surface filled in the main body covered with a synthetic resin film. A sound-absorbing member for a building structure, comprising: a sound-absorbing material made of an inorganic fiber; and a synthetic-fiber nonwoven fabric mat disposed between a surface plate and the sound-absorbing material. 2. The sound-absorbing member of a building structure according to claim 1, wherein a number of convex portions are formed on at least a side of the synthetic fiber nonwoven fabric mat facing the sound-absorbing material. 3. The sound absorbing member of a building structure according to claim 1, wherein a number of convex portions are formed on the side of the sound absorbing material facing the synthetic fiber nonwoven fabric mat. 4. The sound absorbing member according to claim 1, wherein a space is formed on a back surface of the sound absorbing material. 5. The sound absorbing material according to claim 1, wherein the sound absorbing material has a layered structure, and the sound absorbing material layer located on the noise incident side has a lower density than the sound absorbing material layer on the back side thereof. 4. The sound absorbing member of the building structure according to 4.