JP3065262B2 - Sound absorbing panel - 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 panel used for a partition wall, a soundproof room wall, and the like.

[0002]

2. Description of the Related Art Conventionally, a sound absorbing material such as glass wool or the like is attached to a partition or a mounting surface of an indoor wall, or a screw is fixed to a soundproof partition or a soundproof room for soundproofing.

[0003]

However, the conventional sound absorbing material made of glass wool or the like absorbs moisture during use and is deformed or crushed to deteriorate, resulting in a problem that the sound absorbing performance is deteriorated and a problem in mounting the same. Requires a plate-shaped mounting surface in order to ensure a sufficient sound absorbing effect and mounting strength, and there is a problem that mounting cost is high. Glass wool is also undesirable because it is harmful to the human body.

[0004] In view of the above problems, an object of the present invention is to provide a sound absorbing panel which has sufficient sound absorbing performance, is hardly deteriorated, and is advantageous in terms of material and mounting cost.

[0005]

The sound-absorbing panel of the present invention comprises:
A large number of hanging bell-shaped projections are provided on both sides in a two-dimensional arrangement,
The opposite surface of the bell-shaped protrusion on one surface is formed to be a bell-shaped recess on the other surface, and a sound wave passes through an intermediate portion between the bell-shaped protrusion and the bell-shaped recess. It is characterized by comprising an intermediate plate-like member through which a hole to be made is provided, a sound absorbing plate joined to one surface of the intermediate plate-like member, and a sound insulation plate joined to the other surface.

According to the sound absorbing panel of the present invention, the sound wave from the sound absorbing plate side of the sound absorbing panel does not reflect much at the sound absorbing plate, and most of the sound passes through the sound absorbing plate. A part of the sound wave that has passed through the sound absorbing plate is randomly reflected in the space including the hanging bell-shaped concave portion on the sound absorbing plate side of the intermediate plate-like member, interferes with each other, and attenuates, and the remaining portion is attenuated. Passes through the hole of the intermediate plate-shaped member, reaches the space including the hanging bell-shaped recess on the sound insulation plate side of the intermediate plate-shaped member, and is randomly reflected in this space, interferes with each other, and attenuates. Almost no sound waves passing through. In addition, a part of the sound wave that reaches the space including the hanging bell-shaped concave portion on the sound absorbing plate side of the intermediate plate-like member quickly passes through the hole of the intermediate plate-like member and is located on the sound insulating plate side of the intermediate plate-like member. As it reaches the space including the hanging bell-shaped recess,
The amount of sound waves reflected by the intermediate plate member and returning to the sound absorbing plate side can be further reduced. Therefore, the sound absorbing panel can exhibit a sound absorbing effect and a soundproofing effect with respect to the sound from the sound absorbing plate side of the sound absorbing panel, and can further suppress the reverberation to the sound absorbing plate side.

The sound wave from the sound insulating plate side of the sound absorbing panel is
Most of the sound is reflected by the sound insulating plate and returns, but the slight sound waves that have passed through the sound insulating plate are also dispersed in the space including the hanging bell-shaped concave portions on both sides of the intermediate plate-like member, as described above. Since the sound is attenuated, sound waves passing through the sound absorbing plate can be almost eliminated. Therefore, a large soundproofing effect can be exerted even on sound from the sound insulating plate side of the sound absorbing panel.

The sound absorbing panel is composed of an intermediate plate-like member, a sound absorbing plate joined to one surface of the intermediate plate-like member, and a sound insulation plate joined to the other surface. No wall is required for installation, and there is little deformation during use. Therefore, it has sufficient sound absorbing performance, is hardly deteriorated, and is advantageous in terms of mounting cost.

In the sound absorbing panel of the present invention, when the intermediate plate member is formed of a resin molded plate, the sound absorbing plate is formed of a porous plate, and the sound insulating plate is formed of a resin plate or a metal plate, the above-mentioned effects are obtained. And the material cost of the sound absorbing panel can be reduced.

In the sound absorbing panel of the present invention, when the intermediate plate-like member, the sound absorbing plate, and the sound insulating plate are formed in a shape along the curved surface, the sound absorbing panel can be constructed in a curved surface, so that the above-described operation is performed. The use of the sound-absorbing panel which can be performed is expanded and suitable.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference examples and embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 5, a sound absorbing panel according to a reference example of the present invention includes an intermediate plate-like member 1 and a pair of sound absorbing plates 4 and 5 joined to both surfaces of the intermediate plate-like member 1. Consists of

As shown in FIGS. 2 to 5, the intermediate plate-like member 1 is formed by press-molding a resin plate made of vinyl chloride having a thickness of 0.5 to 3 mm and has a large number of bell-shaped protrusions on both surfaces. The resin molded plate is formed by projecting the portions 2 in a grid-like arrangement and forming the opposite side of the bell-shaped projection 2 on one surface to be the bell-shaped recess 3 on the other surface.

Assuming that the center plane in the height direction of the intermediate plate-like member 1 is a virtual reference plane P, the hanging bell-shaped protrusion 2 is
In the shape of a truncated quadrangular pyramid with a corner with a virtual bottom part,
It is composed of a top surface 2a and four side surfaces 2b.
The bell-shaped protrusion 2 and the bell-shaped recess 3 are provided on the entire surface of the intermediate plate-shaped member 1 so as to be adjacent to each other, and the two bell-shaped protrusions 2 are provided.
The center point 10 of the small saddle portion surrounded by the two hanging bell-shaped recesses 3 is on the virtual reference plane P, and the saddle portion is parallel to the virtual reference plane P at this center point 10. The dimensions of each part of the substantially bell-shaped truncated bell-shaped protrusion 2 are 5 to 50 m in height.
m, the size of the top surface 2a is 2 to 20 mm square, the size of the virtual bottom surface is 4 to 40 mm square, and each corner is R1 to R1.
The roundness of 0 mm is made. Therefore, most of the surface of the intermediate plate-like member 1 is formed of a surface inclined with respect to the virtual reference plane P.

The sound absorbing plates 4 and 5 were prepared by holding aluminum particles having a particle size of 0.1 to 1 mm in a plate shape having a thickness of 1 to 10 mm at 500 to 650 ° C. in an inert atmosphere or a reduced pressure atmosphere. This is a porous plate which has sufficient strength and a large number of open cells communicating on both sides.

An epoxy-based adhesive is applied to the top surface 2a of the hanging bell-shaped protrusion 2 on each surface of the intermediate plate-like member 1, and the sound absorbing plates 4 and 5 are bonded. The sound absorbing panel 11 thus made is
Since it can be fitted into a partition or a frame for a soundproof room, or can be screwed, a soundproof room or a soundproof partition can be easily formed without the need for a mounting wall surface.

The sound wave propagating from one of the sound absorbing plates 4 of the sound absorbing panel 11 is partially reflected and returned by the sound absorbing plate 4, but is mostly absorbed and passes through the open cell. pass. A part of the sound wave passing through the sound absorbing plate 4 is absorbed by the intermediate plate-like member 1, and the rest is the surface of the bell-like protrusion 2 and the bell-like concave portion 3 on one side of the intermediate plate-like member 1. Reflected by The sound waves reflected by the intermediate plate-like member 1 are reflected with various changes in the reflection direction and the phase thereof depending on the reflection position of the intermediate plate-like member 1. The light is randomly reflected in the space including the concave portion 3, and most of the light is interfered with each other and attenuated. Further, even a small sound wave passing through the intermediate plate-like member 1 is randomly reflected in the space including the hanging bell-shaped concave portion 2 on the other side of the intermediate plate-like member 1 and interferes with each other to be attenuated. Sound waves passing through the absorbing plate 5 can be almost eliminated.

Most of the sound waves propagating from the other sound absorbing plate 5 side of the sound absorbing panel 11 are also similar to the above.
Since the light is randomly reflected in the space including the hanging bell-shaped concave portion 3 on the other side of the intermediate plate-shaped member 1, interferes with each other and attenuates, sound waves passing through the sound absorbing plate 4 can be almost eliminated. Thus, the sound absorbing panel 11 exhibits a sound absorbing effect and a soundproofing effect for sounds from both sides.

A sound-absorbing panel such as the above-described sound-absorbing panel 11, which exhibits sound-absorbing and sound-absorbing effects on both surfaces, is particularly useful for obtaining a good acoustic environment such as a room in a house or an audio room, or a partition or room in a conference room. It is effective when used in applications where it is desired to prevent sound from leaking to each other, such as a partition.

As shown in FIGS. 6 to 10, the embodiment of the present invention comprises an intermediate plate member 6, a sound absorbing plate 4 joined to one surface of the intermediate plate member 6, and the other surface. And a sound insulating plate 12 joined to the sound insulating plate 12.

As shown in FIGS. 7 to 10, the intermediate plate-like member 6 is different from the intermediate plate-like member 1 of the first embodiment.
This is a resin molded plate in which a hole 14 through which a sound wave passes passes through the center point 10 of the saddle portion surrounded by the two bell-shaped projections 2 and the two bell-shaped recesses 3. The hole 14 extends through the center point 10 of a number of saddle portions and has a diameter of 2 to 10 mm.

The sound absorbing plate 9 is the sound absorbing plate 4 of the above reference example.
Same as 5.

The sound insulating plate 12 is an aluminum plate having a thickness of 1 to 10 mm.

A sound absorbing plate 9 is provided on the top surface 2a of the bell-shaped projection 2 on one surface of the intermediate plate-shaped member 6, a sound insulating plate 12 is provided on the top surface 2a of the bell-shaped projection 2 on the other surface. Each is bonded with an epoxy adhesive or the like. The sound absorbing panel 16 thus formed can be fitted into a partition or a frame for a soundproof room or screwed with the sound absorbing plate 9 as a sound source side, so that the soundproof room, the soundproof box, and the soundproof partition can be easily formed. I can make it.

The sound wave propagating from the sound absorbing panel 9 side of the sound absorbing panel 16 is partially reflected and returned by the sound absorbing plate 9, but is largely absorbed and passes through the open cell. . The sound wave passing through the sound absorbing plate 9 is
Part of the intermediate plate member 6 is absorbed, and the remaining part is randomly reflected in the space including the hanging bell-shaped recess 3 on the side of the sound absorbing plate 9 of the intermediate plate member 6 and interferes with each other. Decay,
The remainder passes through a number of holes 14 penetrating through the center point 10 of the saddle portion of the intermediate plate member 6 and
Since the light is randomly reflected in the space including the bell-shaped concave portion 3 on the second side and interferes with each other to attenuate, sound waves passing through the sound insulating plate 12 can be almost eliminated.

A part of the sound wave arriving in the space including the hanging bell-shaped recess 3 on the side of the sound absorbing plate 9 of the intermediate plate member 6 quickly passes through the hole 14 of the intermediate plate member 6. Intermediate plate member 6
Reaches the space including the bell-shaped concave portion 3 on the side of the sound insulating plate 12, so that the amount of sound waves reflected by the intermediate plate member 6 and returning to the sound absorbing plate 9 can be further reduced. Therefore, the sound absorbing panel 16 can exhibit a sound absorbing effect and a soundproofing effect with respect to the sound from the sound absorbing plate 9 side, and can further suppress the reverberation toward the sound absorbing plate 9 side.

Most of the sound wave from the side of the sound insulating plate 12 of the sound absorbing panel 16 is reflected by the sound insulating plate 12 and returns. The slight sound wave passing through the sound insulating plate 12 is also similar to the above. The hanging bell-shaped concave portions 3 on both sides of the intermediate plate-shaped member 6
The sound wave passing through the sound absorbing plate 9 can be almost eliminated because the sound wave is dispersed and attenuated in the space including the sound absorbing plate 9. Therefore, a large soundproofing effect can be exerted even on sound from the sound insulating plate 12 side of the sound absorbing panel 16.

A sound absorbing panel having a large sound absorbing effect on one side, such as the above sound absorbing panel 16, has a soundproof room with the sound absorbing plate 9 directed toward the inner surface, so that a particularly large noise source is surrounded and noise leaks to the outside. It is effective when used for such purposes as to avoid noise or to suppress the reverberation of noise generated inside.

FIG. 11 shows a use form in which the sound absorbing panel 16 is applied to an inner wall of a tunnel. As shown in FIG.
The intermediate plate member 6, the sound absorbing plate 9, and the sound insulating plate 12 are cut or bent at a factory or a site in accordance with the shape and curvature of the curved tunnel inner wall surface 20, and are bent and adhered to each other to form a curved surface. A sound absorbing panel 16 is formed, and the sound absorbing plate 9 faces the inside of the tunnel.
It can be attached using such as. In this case, the inner wall surface 20 of the tunnel may function as the sound insulating plate 12 except for the sound insulating plate 12, but in consideration of the mounting strength of the sound absorbing panel 16, the use of the sound insulating plate 12 is more preferable. It is certain. As described above, according to the sound absorbing panel 16,
It can be easily attached to concave or convex curved surfaces.

In this mode of use, the sound wave Q from the vehicle traveling in the tunnel is absorbed without reverberation, so that the effect of reducing the noise level in the tunnel and in the vicinity of the tunnel entrance is exhibited.

As shown in FIG. 12, the sound absorbing panel 11 is formed in a cylindrical shape, and the wall 23 of the audio room 22 or the like is formed.
When installed in a corner portion 25 such as a ceiling or a ceiling 24, that is, in a portion where the sound wave Q in the room gathers, the echo of the sound wave Q in the room can be suppressed. Acoustic environment can be improved. When the sound absorbing panel 16 is used for such a purpose, the sound absorbing plate 9 may be configured to be on the outer peripheral side of the cylinder. A sound-collecting reflector for collecting sound more efficiently may be provided around the cylindrical sound-absorbing panels 11 and 16.

In the above embodiment, the intermediate plate-like members 1 and 6 are formed, but the present invention is not limited to this. Instead, for example, a metal plate, paper, or glass cloth is formed. May be configured. Also, the intermediate plate-like member 1,
Although the shape of the hanging bell-shaped protrusion 2 of 6 is a truncated quadrangular pyramid, the present invention is not limited to this, and may be, for example, a truncated cone instead. Further, the sound absorbing plates 4, 5, and 9 were constituted by sintering aluminum particles, but the present invention is not limited to this, and instead, a metal fiber was press-formed so as to have many open cells. Or a resin plate having a large number of open cells.

In the above embodiment, the hole 1 of the intermediate plate member 6
4 penetrates through the center point 10 of the saddle portion surrounded by the two bell-shaped projections 2 and the two bell-shaped recesses 3, but the present invention is not limited to this. It may be provided in the middle part between the bell-shaped recess 3, for example, in the vicinity of the virtual center plane P of the side surface part 2 b of the bell-shaped projection 2. In addition, although the aluminum plate sound insulating plate 12 is used for the sound absorbing panel 16, if the mounting wall has a large sound insulating property, the mounting wall also serves as the sound insulating plate, and the intermediate plate member 6 is provided on the wall. The sound absorbing plate 9 may be directly laminated and attached in this order.

[0034]

According to the sound absorbing panel of the present invention, the sound wave from the sound absorbing plate side of the sound absorbing panel does not reflect much at the sound absorbing plate, and most of the sound passes through the sound absorbing plate. A part of the sound wave that has passed through the sound absorbing plate is randomly reflected in the space including the hanging bell-shaped concave portion on the sound absorbing plate side of the intermediate plate-like member, interferes with each other, and attenuates, and the remaining portion is attenuated. Passes through the hole of the intermediate plate-shaped member, reaches the space including the hanging bell-shaped recess on the sound insulation plate side of the intermediate plate-shaped member, and is randomly reflected in this space, interferes with each other, and attenuates. Almost no sound waves passing through. In addition, a part of the sound wave that reaches the space including the hanging bell-shaped concave portion on the sound absorbing plate side of the intermediate plate-like member quickly passes through the hole of the intermediate plate-like member and is located on the sound insulating plate side of the intermediate plate-like member. Since the sound reaches the space including the hanging bell-shaped recess, the amount of sound waves reflected by the intermediate plate-like member and returning to the sound absorbing plate side can be further reduced. Therefore, the sound absorbing panel can exhibit a sound absorbing effect and a soundproofing effect with respect to the sound from the sound absorbing plate side of the sound absorbing panel, and can further suppress the reverberation to the sound absorbing plate side.

The sound wave from the sound insulating plate side of the sound absorbing panel is
Most of the sound is reflected by the sound insulating plate and returns, but the slight sound waves that have passed through the sound insulating plate are also dispersed in the space including the hanging bell-shaped concave portions on both sides of the intermediate plate-like member, as described above. Since the sound is attenuated, sound waves passing through the sound absorbing plate can be almost eliminated. Therefore, a large soundproofing effect can be exerted even on sound from the sound insulating plate side of the sound absorbing panel.

The sound absorbing panel is composed of an intermediate plate member, a sound absorbing plate joined to one surface of the intermediate plate member, and a sound insulating plate joined to the other surface. No wall is required for installation, and there is little deformation during use. Therefore, it has sufficient sound absorbing performance, is hardly deteriorated, and is advantageous in terms of mounting cost.

In the sound absorbing panel of the present invention, when the intermediate plate member is formed of a resin molded plate, the sound absorbing plate is formed of a porous plate, and the sound insulating plate is formed of a resin plate or a metal plate, the above-mentioned effects are obtained. And the material cost of the sound absorbing panel can be reduced.

In the sound absorbing panel of the present invention, if the intermediate plate-like member, the sound absorbing plate and the sound insulating plate are formed along the curved surface, the sound absorbing panel can be constructed in a curved surface. The use of the sound-absorbing panel which can be performed is expanded and suitable.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reference example of the present invention.

FIG. 2 is a partially cutaway perspective view showing an intermediate plate-shaped member in a reference example of the present invention.

FIG. 3 is a plan view showing an intermediate plate-shaped member according to a reference example of the present invention.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is a sectional view taken along the line BB in FIG. 3;

FIG. 6 is a perspective view showing an embodiment of the present invention.

FIG. 7 is a partially cutaway perspective view showing an intermediate plate-shaped member according to an embodiment of the present invention.

FIG. 8 is a plan view showing an intermediate plate-shaped member according to an embodiment of the present invention.

FIG. 9 is a sectional view taken along the line CC in FIG. 8;

FIG. 10 is a sectional view taken along the line DD in FIG. 8;

FIG. 11 is a cross-sectional view showing one mode of use of the sound absorbing panel of the present invention.

FIG. 12 is a sectional view showing another use form of the sound absorbing panel of the present invention.

[Explanation of symbols]

 1, 6 Intermediate plate-shaped member (resin molded plate) 2 Hanging bell-shaped protrusion 3 Hanging bell-shaped recess 4, 5, 9 Sound absorbing plate (porous plate) 10 Center point of saddle portion 11, 16 Sound absorbing panel 12 Sound insulating plate 14 Hole P Virtual reference plane

Claims (3)

(57) [Claims] A large number of bell-shaped projections are provided on both sides in a two-dimensional arrangement, and the opposite surface of the bell-shaped projection on one surface is formed as a bell-shaped recess on the other surface. An intermediate plate-shaped member having a hole through which sound waves pass through an intermediate portion between the bell-shaped protrusion and the bell-shaped concave portion, and joined to one surface of the intermediate plate-shaped member. A sound absorbing panel comprising a sound absorbing plate and a sound insulating plate joined to the other surface. 2. The sound absorbing panel according to claim 1, wherein the intermediate plate member is formed of a resin molded plate, the sound absorbing plate is formed of a porous plate, and the sound insulating plate is formed of a resin plate or a metal plate. 3. The sound absorbing panel according to claim 1, wherein the intermediate plate-like member, the sound absorbing plate, and the sound insulating plate are shaped along a curved surface.