JP2002220889A - Sound absorber for internal angle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound absorber for an internal angle capable of restraining reflection of a sound wave at an internal angle area where three or more wall surfaces intersect one another to restrain resonance at the internal angle area. SOLUTION: An adhesive 7 is applied to bonding surfaces 4, 5, 6 of the sound absorber 1 for the internal angle. After application of the adhesive 7, with the sound absorbing surface 2a pointed toward the opposite side to the apex 10a of the internal angle area 10, the bonding surface 4 abuts to a ceiling wall surface 11, the bonding surface 5 abuts to a side wall surface 12, and the bonding surface 6 abuts to a side wall surface 13. By the above abutting, the bonding surfaces 4, 5, 6 are fixed to the respective wall surfaces 11, 12, 13 by the adhesive 7. As a result, the sound absorber 1 for the internal angle is disposed in the internal angle area 10 with the respective edges of the sound absorbing surface 2a of the sound absorber 2 in contact with the all wall surfaces 11, 12, 13 intersecting in the internal angle area 10, thereby covering and blocking up the internal angle area 10 with the sound absorber 2. Sound waves entering the internal angle area 10 are all received and damped by the sound absorbing surface 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-corner sound absorber capable of suppressing reflection of a sound wave at an in-corner where three or more wall surfaces intersect, thereby suppressing resonance at the in-corner. It is about.

[0002]

2. Description of the Related Art Since the interior of a building or the like is surrounded by a floor surface, a ceiling surface, and a side wall surface, sound waves generated in the room are reflected on the floor surface, the ceiling surface, and the side wall surface, and are reflected in the room. The resonance sounds. Therefore, for example, a sound absorbing material formed of a porous material having a large number of micropores such as soft urethane foam or glass wool is laid in layers on a floor surface, a ceiling surface, and a side wall surface of an indoor room, and the indoor sound absorbing material is generated indoors. There has been proposed a method of rapidly attenuating a sound wave to suppress a resonance sound.

According to the method using the sound absorbing material, when a sound wave generated indoors is incident on the sound absorbing material, the sound wave vibrates air existing in the minute holes in the sound absorbing material, and the air generates minute air of the sound absorbing material. This causes viscous friction with the pore surface. Due to this friction, part of the energy of the sound wave is converted into heat energy, the energy of the sound wave is attenuated, and the resonance sound is reduced.

[0004]

However, even if the above-described sound absorbing material is laid on an indoor wall, at least two side walls and a ceiling (or floor) intersect in a building or the like indoors. There is an inset corner portion formed as a result. In such a corner portion, the sound wave is repeatedly reflected on the side wall surface and the ceiling wall surface, so that the sound pressure of the sound becomes extremely large. For this reason, there is a problem that the sound is hardly attenuated in the corner portion and the resonance sound is likely to remain.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and suppresses the reflection of sound waves at the corner where three or more wall surfaces intersect, thereby reducing the resonance at the corner. An object of the present invention is to provide a corner-absorbing sound absorbing device capable of suppressing noise.

[0006]

Means for Solving the Problems To achieve this object, a sound absorbing device for a corner according to claim 1 is provided at a corner where three or more wall surfaces intersect. A sound absorbing body formed in a substantially truncated polygonal pyramid shape with a sound absorbing material to be attenuated, and a polygonal sound absorbing surface provided on the bottom surface of the sound absorbing body and having an edge in contact with all the wall surfaces intersecting at the corners,
The sound absorbing body is provided on a side surface of the sound absorbing body that is inclined with respect to the sound absorbing surface, and has a wall surface that intersects at the corner and an adhesive surface formed so as to be in contact with the wall. By doing so, the sound absorbing surface is directed to the opposite side to the corner portion,
In addition, the sound absorbing surface is provided obliquely with respect to the wall surface at the corner.

According to the first aspect of the present invention, the sound absorbing surface of the sound absorber is opposite to the corner when the adhesive surface of the sound absorber is abutted on the wall surface intersecting at the corner. While being directed to the side, the sound absorbing surface is inclined with respect to the wall surface that intersects at the corner. Here, since the sound absorbing body is in contact with all the wall surfaces where the edges of the sound absorbing surface intersect at the corners, the sound absorbing surface covers and covers the corners. For this reason, the sound wave which is going to enter the corner portion is attenuated by the sound absorbing surface.

According to a second aspect of the present invention, there is provided a sound absorbing device for a corner, which is disposed at a corner where three or more walls intersect, and has an edge in contact with all the walls intersecting at the corner. A sound absorber formed of a sound absorbing material that attenuates sound waves, a mounting portion to which the opposite surface of the sound absorbing surface is mounted, and a mounting portion provided with a polygonal sound absorbing surface on one surface. And a support having an adhesive surface formed to be in contact with a wall surface that is inclined with respect to the sound absorbing surface of the sound absorbing body attached to the portion and intersects at the corners of the sound absorbing body. The sound absorbing surface of the sound absorbing body is directed to the opposite side to the corner portion by adhering the adhesive surface to the wall surface of the corner portion, and the sound absorbing surface is inclined with respect to the wall surface of the corner portion. It is.

According to the second aspect of the present invention, when the adhesive surface of the support is abutted on the wall surface intersecting at the corner, the sound absorbing device attached to the mounting portion of the support. The sound absorbing surface of the body is directed to the opposite side to the corner, and the sound absorbing surface is inclined with respect to the wall surface intersecting at the corner. Here, since the sound absorbing body is in contact with all the wall surfaces where the edges of the sound absorbing surface intersect at the corner, the sound absorbing surface covers and covers the corner.
For this reason, the sound wave which is going to enter the corner portion is attenuated by the sound absorbing surface.

According to a third aspect of the present invention, there is provided a sound absorbing device for a corner.
In the cornering sound absorbing device according to the aspect, the attachment portion is formed on a polygonal surface corresponding to a sound absorbing surface of the sound absorbing body,
The support is formed in a substantially truncated polygonal pyramid shape with the attachment portion as a bottom surface and the adhesive surface as a side surface.

[0011]

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an external perspective view of the cornering sound absorbing device 1 as seen from the rear side, and FIG. 2A is a front view of the cornering sound absorbing device 1.
FIG. 2B is a rear view of FIG. 2A, and FIG.
FIG. 3 is an enlarged cross-sectional view taken along line CC of FIG.
FIG. 2D is an enlarged sectional view taken along line DD of FIG. 2B.

As shown in FIG. 3, the corner sound absorbing device 1 is disposed in a corner portion 10 formed by crossing three wall surfaces of a ceiling wall surface 11 and two side wall surfaces 12 and 13. What is used. As shown in FIG. 1, the cornering sound absorber 1 is
It is formed in a truncated triangular pyramid shape, and includes a sound absorber 2 that attenuates sound waves and absorbs sound, and a support 3 that supports the sound absorber 2 at the corner 10.

The sound absorber 2 is made of a porous material (sound absorbing material) having a large number of micropores, such as soft urethane foam or glass wool, and has a truncated triangular pyramid with a bottom surface in the shape of an equilateral triangle. As shown in FIG. 2A, an equilateral triangular sound absorbing surface 2a is formed on the bottom surface of the sound absorbing body 2. Further, on the peripheral edge of the sound absorbing body 2, side surfaces 2 extending from the three edges of the sound absorbing surface 2 a toward the support 3 side, respectively.
b, 2c and 2d are formed.

These side surfaces 2b, 2c and 2d are respectively inclined so as to form an angle of approximately 45 ° with respect to the sound absorbing surface 2a. Is formed on an attachment surface 2e. Here, the sound absorbing body 2 is attached from the sound absorbing surface 2a side to the mounting surface 2e.
Is formed so that the cross-sectional area gradually decreases to the side.
“e” is formed in a similar regular triangle shape having a smaller surface area than the sound absorbing surface 2a.

The support 3 is made of a lightweight foamed resin material such as foamed styrene or foamed styrene, and has a truncated triangular pyramid with a bottom surface in the shape of an equilateral triangle, and has a greater thickness than the sound absorber 2. ing. An equilateral triangular attachment surface 3a having a surface area substantially equal to the attachment surface 2e of the sound absorber 2 is formed on the bottom surface of the support 3, and the attachment of the sound absorber 2 to this attachment surface 3a. The surface 2e is stuck (attached) with an adhesive or the like. Further, on the periphery of the support 3, side surfaces 3 b, 3 c, 3 d extending from the three edges of the attachment surface 3 a toward the opposite side to the sound absorber 2 side are formed.

The side surfaces 3b, 3c, 3d are respectively inclined so as to form an angle of approximately 45 ° with respect to the mounting surface 3a, and the side surface 3b is formed on the side surface 2b of the sound absorber 2 and the side surface 3b.
c is formed so that the side surface 2c of the sound absorbing body 2 and the side surface 3d are flush with the side surface 2d of the sound absorbing body 2, respectively. Here, the surface formed by the side surfaces 2b and 3b is the bonding surface 4, the surface formed by the side surfaces 2c and 3c is the bonding surface 5,
The surface formed by the side surfaces 2d and 3d is the bonding surface 6. The three bonding surfaces 4, 5, and 6 are configured as described above so that they can abut the ceiling wall surface 11 and the side wall surfaces 12, 13 (see FIG. 3).

Referring to FIG. 3 and FIG.
The installation method of the will be described. FIG. 3 shows a sound absorbing device 1 for a corner.
4 (a) is a longitudinal sectional view taken along line IV (a) -IV (a) in FIG. 3, and FIG. 4 (b) is a vertical sectional view taken along line IV (a) in FIG. FIG. 4B is a transverse sectional view taken along line IV-B.

As shown in FIG. 3, the interior corner portion 10 in which the interior corner sound absorbing device 1 is provided has a ceiling wall surface 11 and two side wall surfaces 12 and 13 having three wall surfaces at a vertex 10a. They cross at almost right angles. When disposing the corner sound absorbing device 1 in the corner corner portion 10, first, an adhesive (adhesive material) 7 is applied to the bonding surfaces 4, 5, and 6 of the corner sound absorbing device 1. After the adhesive 7 is applied, the adhesive surface 4 is attached to the ceiling wall 11, the adhesive surface 5 is attached to the side wall surface 12, and the adhesive surface 6 is attached in a state where the sound absorbing surface 2 a is directed to the opposite side of the apex 10 a of the corner 10. Are brought into contact with the side wall surfaces 13 respectively. As a result of this contact, as shown in FIG.
Thereby, it is brought into contact with each of the wall surfaces 11, 12, and 13.

As a result, as shown in FIG. 3, the edge-adjacent sound absorbing device 1 is configured such that each edge of the sound absorbing surface 2a of the sound absorbing body 2 has an edge 10a.
The sound absorbing body 2 (sound absorbing surface 2a) covers and covers the inside corner portion 10 in a state of being in contact with all the wall surfaces 11, 12, and 13 intersecting with each other. Therefore, all sound waves that are to enter the corner 10 can be received and attenuated by the sound absorbing surface 2a. Moreover, since no gap is formed between each edge of the sound absorbing surface 2a and each of the wall surfaces 11, 12, 13, it is possible to prevent sound waves from entering the corner 10 through the gap.

A space 14 surrounded by the support 3, the ceiling wall 11 and the side walls 12, 13 is provided in the corner 10 covered by the sound absorbing surface 2 a of the corner sound absorbing device 1. The space 14 contains air.
By providing the space 14 behind the corner sound absorbing device 1 as described above, when sound waves enter the sound absorbing surface 2a, the sound wave energy can cause the corner sound absorbing device 1 to vibrate in a film. The sound wave can be further attenuated by the membrane vibration, and the sound absorption coefficient of the corner sound absorbing device 1 can be further improved.

Next, a description will be given of the sound absorbing operation of the corner sound absorbing device 1 provided in the corner portion 10. The sound wave generated indoors propagates in the air and reaches the sound absorbing surface 2a, and a part of the sound wave enters the sound absorbing body 2 from the sound absorbing surface 2a, while the remainder is reflected by the sound absorbing surface 2a, and the indoor air is again emitted. Propagate inside. The sound wave that has entered the sound absorber 2 propagates into the air in the micropores of the porous material constituting the sound absorber 2, and excites the air in the micropores to vibrate.

Vibration of the air in the micropores causes viscous friction between the air and the inner surface of the micropores, and the heat generated by the viscous friction converts a part of the energy of the sound wave into heat energy. Sound waves are attenuated. Further, the sound wave incident on the sound absorbing surface 2a causes the corner sound absorbing device 1 to vibrate in film. Due to this membrane vibration, part of the energy of the sound wave is further consumed, and the sound wave is attenuated. Due to the attenuation of the sound wave accompanying the decrease in the energy of the sound wave, the sound at the corner 10 becomes smaller.

As described above, according to the cornering sound absorber 1 of the present embodiment, the sound absorber 2 formed of a porous material is
Since the edge of the sound absorbing surface 2a contacts all the wall surfaces 11, 12, and 13 intersecting at the corner 10, the corner 10 can be covered with the sound absorbing surface 2a. Therefore, the sound absorbing surface 2a receives and attenuates the sound wave incident on the corner portion 10 and can reduce the resonance sound generated by the reflection of the sound wave at the corner portion 10.

The sound absorbing device for corners 1 is formed in a truncated triangular pyramid shape having the sound absorbing surface 2a of the sound absorbing body 2 as a bottom surface and the bonding surfaces 4, 5, 6 as side surfaces. The wall surface 1 which intersects the bonding surfaces 4, 5, 6 at a substantially right angle at the corner 10
Wall surfaces 11, 12, 13 of corner portions 10 at 1, 12, 13
, As shown in FIG. 4, the sound absorbing surface 2a
Can be inclined with respect to the wall surfaces 11, 12, 13 of the corner portion 10. In this way, the sound absorbing surface 2a is
By sloping against the wall surfaces 11, 12, 13 of
The sound absorbing coefficient of the sound absorbing body 2 can be improved.

Further, the indoor sound absorbing device 1 has bonding surfaces 4, 5, 6
Is attached to the wall portions 11, 12, and 13 and is disposed in the corner portion 10, so that it is not necessary to attach the bracket to the corner portion 10 using metal fittings. The cost can be reduced by reducing the score. Also,
Even if the sound absorber 2 is thin, if the thick support 3 is used, the area of the side surfaces 3b, 3c, 3d of the support 3 becomes large, so that the bonding surface is formed by the side surfaces 3b, 3c, 3d of the support 3. Areas 4, 5, and 6 can be made sufficiently large. Therefore, even in the case of the thin sound absorber 2, the corner portion 10 can be surely formed.
Can be arranged.

FIG. 5 is an external perspective view of the cornering sound absorbing device 20 of the second embodiment as seen from the rear side. The cornering sound absorber 20 of the second embodiment is different from the cornering sound absorber 1 of the first embodiment in the shape of the support. Hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals,
A description thereof will be omitted, and only different portions will be described. As shown in FIG. 5, in the corner sound absorbing device 20 of the second embodiment, the first
Instead of the support 3 of the embodiment, the sound absorber 2 is attached to the support 21. The support body 21 is formed in a substantially truncated triangular pyramid shape like the support body 3, but is formed in a frame shape in which an equilateral triangular opening 22 is formed at the center thereof.

Also with the sound absorbing material for corners 20 of the second embodiment, the sound absorbing material 2 can cover and cover the corners 10, so that the incidence of sound waves on the corners 10 can be suppressed and the resonance sound can be reduced. Generation can be suppressed. Moreover, the support 21
Is formed in a frame-like body, so that the foaming resin material forming the support 21 can be saved correspondingly, the material cost can be reduced, and the sound absorbing device 20 for the corner can be reduced in weight. it can.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. Can easily be inferred.

For example, in this embodiment, the sound absorbing device 1 for a corner is disposed at the corner 10 where the ceiling wall surface 11 and the side wall surfaces 12 and 13 are perpendicular to each other. It was formed into a shape. However, the shape of the corner sound absorbing device is not necessarily limited to a truncated triangular pyramid shape. For example, a truncated quadrangular pyramid shape that can be arranged at a corner portion where four or more wall surfaces intersect, a five-sided truncated pyramid shape A truncated pentagonal pyramid shape that can be disposed at an intersecting corner where the above wall surfaces intersect, a truncated n-pyramid shape that can be disposed at an intersecting corner portion where n or more wall surfaces intersect. Is also good.

Further, in this embodiment, the shape of the sound absorbing surface 2a is formed in an equilateral triangle, but the shape of the sound absorbing surface is not necessarily limited to an equilateral triangle, and may be, for example, an isosceles triangle. May be. Further, the material of the support 3 is
The foamed resin material is not necessarily limited to the above-mentioned foamed styrene or foamed styrene, and may be, for example, another foamed resin material such as hard urethane foam or a hard resin material in which a foaming agent is not mixed. . That is, any material may be used as long as it is lightweight and can be adhered to the wall surface with an adhesive.

The cornering sound absorber 1 of this embodiment has a two-layer structure by laminating the sound absorber 2 and the support 3.
The structure of the cornering sound absorber is not necessarily limited to the two-layer structure of the sound absorber and the support.For example, only the thicker sound absorber without the support is used to form the corner sound absorber. Is also good.

Further, instead of the adhesive 7 used when attaching the corner sound absorbing device 1 to the corner corner portion 10, a double-sided adhesive tape having both surfaces coated with an adhesive may be used.

[0033]

According to the sound absorbing device for a corner according to the present invention, since the sound absorbing body formed of the sound absorbing material is in contact with all the wall surfaces where the edges of the sound absorbing surface intersect at the corner, the sound absorbing surface is used. The corner can be covered and closed. Therefore, the sound wave that is going to enter the corner is incident on the sound absorbing surface and is attenuated, so that there is an effect that it is possible to reduce the resonance sound generated by the reflection of the sound wave at the corner.

In particular, according to the sound absorbing device for a corner, the sound absorbing body is formed in a substantially truncated polygonal pyramid shape with the sound absorbing surface as a bottom surface. It is possible to form an adhesive surface that can contact the wall surface. If this adhesive surface is brought into contact with the wall surface of the corner, the sound absorbing surface can be inclined with respect to the wall of the corner. There is an effect that can be improved.

According to the sound absorbing device for corners according to the second or third aspect, the adhesive surface formed on the side surface of the support is brought into contact with the wall surface of the corner so that the sound absorbing surface of the sound absorber can be achieved. Can be inclined with respect to the wall surface of the corner. By thus arranging the sound absorbing surface obliquely with respect to the wall surface at the corner, there is an effect that the sound absorbing coefficient of the sound absorbing body can be improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a cornering sound absorbing device according to an embodiment of the present invention, as seen from the back side.

FIG. 2 (a) is a front view of a corner sound absorbing device,
(B) is a rear view of (a), (c) is an enlarged sectional view taken along line CC of (a), and (d) is (b)
It is an expanded sectional view in the DD line.

FIG. 3 is a perspective view showing an installation state of a cornering sound absorbing device.

4A is a longitudinal sectional view taken along the line IV (a) -IV (a) of FIG. 3, and FIG. 4B is a sectional view taken along the line IV (b) of FIG.
FIG. 4 is a cross-sectional view taken along line -IV (b).

FIG. 5 is an external perspective view of the cornering sound absorbing device of the second embodiment as viewed from the rear.

[Explanation of symbols]

 1,20 Sound absorbing member for corner 2 Sound absorber 2a Sound absorbing surface 2b, 2c, 2d Side surface (adhesive surface) 3,21 Support body 3a Attachment surface (attachment part) 3b, 3c, 3d Side surface (adhesive surface) 10 Corner part 11 Ceiling wall surface (wall surface) 12, 13 Side wall surface (wall surface)

Claims (3)

[Claims] 1. A sound absorber for a corner provided at a corner where three or more wall surfaces intersect, wherein the sound absorber is formed in a substantially truncated polygonal pyramid shape with a sound absorbing material that attenuates sound waves. A polygonal sound-absorbing surface provided on the bottom surface of the sound-absorbing body and having an edge in contact with all the wall surfaces intersecting at the corners; and a corner provided on the side surface of the sound-absorbing body inclined with respect to the sound-absorbing surface. And a bonding surface formed so as to be able to abut, and the sound absorbing surface is directed to a side opposite to the corner portion, by abutting the adhesion surface to a wall surface of the corner portion, and A sound absorbing device for a corner, wherein the sound absorbing surface is inclined with respect to a wall surface of the corner. 2. A sound absorbing device for a corner provided at a corner where three or more wall surfaces intersect, wherein a polygonal sound absorbing surface having an edge contacting all the wall surfaces intersecting at the corner is one. A sound absorber formed of a sound absorbing material that attenuates sound waves, a mounting portion to which the opposite surface of the sound absorbing surface is attached to the sound absorbing surface, and the mounting portion mounted to the mounting portion. A support having a wall inclined at an angle to the sound absorbing surface of the sound absorber and intersecting at the corner and an adhesive surface formed so as to be able to abut, and the adhesive surface of the support material is formed at the corner of the corner. The sound absorbing surface of the sound absorbing body is directed to a side opposite to the corner portion by abutting on a wall surface, and the sound absorbing surface is inclined with respect to the wall surface of the corner portion. Sound absorber. 3. The mounting portion is formed on a polygonal surface corresponding to a sound absorbing surface of the sound absorbing body.
3. The corner-absorbing sound absorbing device according to claim 2, wherein the attachment portion has a bottom surface, and is formed in a substantially truncated polygonal pyramid shape having the adhesive surface as a side surface.