JP2005227533A - Sound-proof panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound-proof panel permitting to realize cost reduction with simple constitution, and also permitting to facilitate acoustic control by sound absorption and scattering. <P>SOLUTION: The acoustic panel 10 is constituted of a 1st area 11 having about constant thickness t1 and a 2nd area 12 having thickness t2. The thickness t2 of the 2nd area 12 is made thinner than the thickness t1 of the 1st area 11, and the 2nd area 12 is made to be a thin part 14 to the 1st area 11. The sound-proof panel 10 is molded of a predetermined molding material M into one body, and the 1st area 11 is used as a low density area to demonstrate a sound absorbing effect, while the 2nd area is used as a high density area to demonstrate a sound scattering effect. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soundproof panel, and more particularly to a soundproof panel capable of obtaining a sound absorption effect and a scattering effect with a simple structure.

Conventionally, when controlling the acoustic conditions of an indoor space, a sound absorbing material that absorbs sound by a porous member such as glass wool or a soft fiber board (see Patent Document 1) and a scattering material having irregularities formed on the surface are combined. A form (conventional form 1) is known.
In addition, a plurality of pipes having openings are used to absorb sound by making sound waves enter the pipe from the openings, or to scatter sound by resonating and re-radiating sound waves that have entered the pipe (conventional form 2). Patent Documents 2 and 3) are known.

JP-A-8-27740 JP 7-302087 A JP 2002-30744 A

However, in the conventional form 1, when it is attached to a wall surface or the like of an indoor space, it is necessary to have an advanced design that disperses and arranges the sound absorbing material and the scattering material, and the sound absorbing material and the scattering material are combined by field construction. This causes the inconvenience of being troublesome. In particular, in a small volume space such as a living room in a house, the sound absorbing material and the scattering material are divided into small areas, which not only requires a lot of work, but also causes many unnecessary parts to be discharged due to the division. This causes inconvenience that it causes cost increase.
Further, in the conventional mode 2, since a plurality of pipes and the like are required, the number of components increases, and a great deal of labor is required for the assembly work, which also increases the cost burden. Inconvenience.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and the object thereof is to realize cost reduction with a simple configuration and to easily perform acoustic control by sound absorption and scattering. It is to provide a soundproof panel that can be used.

  In order to achieve the above-mentioned object, the present invention adopts a configuration in which a single molding is performed using a predetermined molding material and regions having different densities of the molding material are provided.

  In addition, the present invention includes first and second regions having a substantially constant thickness, and the thickness of one of the regions is a thin portion relative to the other region, and the thin portion has a high density On the other hand, it is possible to adopt a configuration in which the region excluding the thin portion is a low-density region.

  In this invention, it is preferable to employ | adopt the structure that the said thin part is formed by depressing a surface position.

  Further, the thin wall portion is provided so that a cylindrical space can be formed between the formation surface and the thin wall portion when the thin wall portion is attached to the formation surface of the predetermined building, and the outside of the space and the thin wall portion. A configuration in which an opening that communicates with each other is also preferably employed.

According to the present invention, by adjusting the density of the molding material, it is possible to form the soundproof panel as an integrally molded product in which the molding material has a high density and the sound scattering region and the low density sound absorption region are mixed. it can. Thereby, like the said conventional form 1, it becomes possible to omit the effort and labor which combine a sound-absorbing material and a scattering material at a construction site, and to perform indoor acoustic control easily. In addition, since the soundproof panel is integrally formed, the construction work can be simplified while minimizing the number of parts, and the cost can be reduced.
In addition, since the thin-walled portion is made into a high-density region, when unevenness is formed on the surface of the high-density region, such as by denting the high-density region due to a change in thickness, the design to control the direction of reflected sound by the unevenness The sound absorption effect can be exhibited at the same time in a low density region other than the high density region.
In addition, when a cylindrical space is formed between the building surface and the thin wall part, the sound absorption mechanism and scattering mechanism are combined with pipe materials using a single soundproof panel, with a minimum number of parts. can do. Here, the sound absorption effect by the pipe material is mainly exerted favorably with respect to the low frequency range sound, while the sound absorption due to the low density range is mainly favorably exerted with respect to the medium frequency range sound. It is possible to obtain a broadband sound absorption effect with a single soundproof panel.
In the claims and the present specification, “high density” and “low density” are used as concepts that relatively represent the density of the molding material between them.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic perspective view of the soundproof panel according to the first embodiment, and FIG. 2 is a cross-sectional view of FIG. In these drawings, the soundproof panel 10 is integrally formed by press molding and is not particularly limited. However, the soundproof panel 10 is used in a partition shape via a leg portion (not shown) or attached to a wall surface or ceiling surface of an indoor space. Is. The soundproof panel 10 is formed in a first region 11 having a substantially rectangular outer shape when viewed from the front, and at three positions along the left-right direction in FIG. And a second region 12 extending in the direction.

  As shown in FIG. 2, the first region 11 is set to a substantially constant thickness t1, while each second region 12 is set to a substantially constant thickness t2. The thickness t <b> 2 of the second region 12 is thinner than the thickness t <b> 1 of the first region 11, whereby the second region 12 is a thin portion 14 with respect to the first region 11. On the other hand, the first region 11 is a thick portion 15 with respect to the second region 12. Each second region 12 is formed so as to be depressed with respect to the upper surface 11A of the first region 11 when viewed from the upper side in FIG. 2, while the first region 12 is first when viewed from the lower side in FIG. It is formed so as to protrude with respect to the lower surface 11B of the region 11. Each of the second regions 12 has a substantially trapezoidal shape when viewed in cross section, and is connected to the first region 11 and gradually approaches toward the lower side in FIG. 2 and the lower surface 11B of the first region 11 is connected to the lower surface 11B of the first region 11 and is connected to the lower surface 11B of the first region 11 in FIG.

  Next, a molding apparatus 20 for molding the soundproof panel 10 and a molding method using the same will be described with reference to FIGS.

The molding apparatus 20 temporarily holds a mold apparatus 22 having a cavity 21 having a shape corresponding to the shape of the soundproof panel 10, and a molding material M for molding the soundproof panel 10, and the molding material is contained in the cavity 21. And a holding member 23 for charging M.
The mold apparatus 22 includes a lower mold 25 and an upper mold 26, and the cavity 21 is formed between the lower mold 25 and the upper mold 26. As shown in FIG. 5, when the lower mold 25 and the upper mold 26 are closed, the cavity 21 is formed in the area where the second area 12 is formed relative to the area where the first area 11 is formed. However, it has a shape that reduces the distance between the formation surfaces of the cavities 21 in the molds 25 and 26.
The holding member 23 is provided so as to hold the molding material M substantially right above the lower mold 25 and to be instantaneously movable in a direction orthogonal to the paper surface in FIG. 3 via a driving device (not shown). The molding material M is put into the cavity 21 at the same time that the mold 25 is retracted from above the cavity 21.

  Here, as the molding material M, a material in which a binder is attached to wood fibers or chemical fibers such as fibers and strands is used. As the binder, any of a foamable binder, a non-foamable binder, and a mixture thereof can be adopted.

When the soundproof panel 10 is molded by the molding apparatus 20, first, the molding material M is introduced into the holding member 23, and then the holding member 23 is vibrated so that the molding material M has a substantially constant height (see FIG. 3). Forming is performed so that
Next, by moving the holding member 23 in the direction orthogonal to the paper surface in FIG. 3 and retracting from above the lower mold 25, the molding material M falls almost directly below, and as shown in FIG. The molding material M is put into the cavity 21 at a substantially constant height.
After that, as shown in FIG. 5, the lower mold 25 and the upper mold 26 are closed, a predetermined pressing pressure is applied to the molding material M, the lower mold 25 is heated at a predetermined temperature for a predetermined time, and then the lower mold 25. Then, the soundproof panel 10 is formed by removing the upper mold 26.

  In the soundproof panel 10 thus molded, since the cavity 21 has the shape as described above, the density of the molding material M is different between the first region 11 and the second region 12, that is, the first The molding material M in the second region 12 is more compressed and denser than the region 11 in FIG. Here, the second region 12 is a high-density region, while the first region 11 is a low-density region.

Therefore, according to such a 1st embodiment, sound absorption can be performed like a porous member by the 1st field 11 where molding material M becomes low density, and molding material M becomes high density. Sound can be reflected by the second region 12. That is, the sound absorbing effect and the scattering effect can be exhibited simultaneously by the single soundproof panel 10.
In addition, since the second region 12 is formed in a substantially trapezoidal shape in sectional view by the pair of inclined surface portions 17 and 17 and the flat portion 18, the sound incident on the second region 12 is reflected and scattered in various directions. can do. In addition, since the second region 12 is formed so that the upper surface 11A of the first region 11 is depressed and protrudes from the lower surface 11B, when the soundproof panel 10 is used in the form of a screen, the second region 12 Sound can be scattered on both the upper and lower surfaces in FIG.

  Next, embodiments other than the first embodiment of the present invention will be described. In the following description, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals as necessary, and the description is omitted or simplified.

[Second Embodiment]
FIG. 6 shows a schematic perspective view of a soundproof panel 10 according to the second embodiment of the present invention, and FIG. 7 shows a cross-sectional view of FIG. In the second embodiment, the second region 12 is formed in a substantially circular shape when viewed from the front.
The second region 12 is connected to the first region 11 when viewed in cross section as shown in FIG. 7, and is curved to the lower side in FIG. 7, and the outer curved surface portion. 30 and the inner curved surface portion 31 having a curved shape that continues to the lower side in the figure and has a central portion that bulges downward.

  Therefore, the second embodiment can obtain the same operation and effect as those of the first embodiment, and the second region 12 is formed by a curved surface, so that it is reflected by the second region 12. It is possible to further scatter the direction of sound.

[Third Embodiment]
FIG. 8 shows a schematic perspective view of a soundproof panel 10 according to a third embodiment of the present invention, and FIG. 9 shows a cross-sectional view of FIG. In the third embodiment, a cylindrical space S is formed between the wall surface W and the second region 12 when the soundproof panel 10 is attached to the wall surface W to be a formation surface of a predetermined building. It is.
Each of the second regions 12 is formed so as to sink the mounting surface 11C that contacts the wall surface W in the first region 11, and the upper and lower sides in FIG. It is set to a length located on the inner side from the end, and thereby the space S is provided between the wall surface W and the space S. Further, the opposite mounting surfaces 11D and 12D of the first and second regions 11 and 12 located on the opposite side (lower side in FIG. 9) to the mounting surface 11C are formed to be substantially flush with each other.
Here, each second region 12 is provided with an opening 34 that communicates the space S with the outside thereof. The opening 34 of the second region 12 located on the left and right in FIG. 8 is a slot extending in the extending direction of the second region 12 (vertical direction in FIG. 8), while being at the center in the horizontal direction in FIG. The openings 12 of the second region 12 positioned are a plurality of holes formed along the extending direction.

  Therefore, according to the third embodiment, when a sound wave enters the space S from the opening 34, the sound wave resonates and a sound absorbing effect can be exhibited. While the sound absorption by the space S is effectively exhibited with respect to the low frequency range sound, the first region acting in the same manner as the porous member exhibits the sound absorption effect with respect to the medium frequency range sound. Broadband sound absorption can be performed by one soundproof panel 10.

[Fourth Embodiment]
FIG. 10 is a schematic perspective view of the soundproof panel 10 according to the fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that the position and shape of each opening 34 are changed and a flow resistance material 35 (shown by a halftone dot in the figure) is arranged in the opening 34. is there.
Each opening 34 is provided on the lower side in FIG. 10 of the second region 12 and is formed in a substantially square shape in front view. Moreover, the flow resistance material 35 is comprised by porous members, such as glass wool, and is provided so that the opening part 34 may be plugged up.

  Therefore, according to the fourth embodiment, when the sound passes through the opening 34, the sound is also absorbed by the flow resistance material 35, and a sound absorption effect can be obtained more effectively. Become.

[Fifth Embodiment]
FIG. 11 is a schematic perspective view of a soundproof panel 10 according to the fifth embodiment of the present invention. The fifth embodiment is similar to the fourth embodiment in a configuration similar to the configuration in which the flow resistance member 35 in the opening 34 formed in the second region 12 is omitted.
According to such a configuration, the sound can be scattered by resonating the incident sound from the opening 34 in the space S and performing acoustic re-radiation with a time delay.
In FIG. 11, the height positions of the openings 34 are different from each other. However, the height of the second region 12 is such that good scattering characteristics can be obtained depending on conditions such as the vertical length in FIG. Set to position.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
That is, the present invention has been particularly shown and described with respect to particular embodiments, but is not limited to the embodiments described above without departing from the scope and spirit of the present invention. Various modifications can be made by those skilled in the art in terms of position, material or direction, and other detailed configurations.

For example, the shape and direction of the second region 12 can be variously changed so that the effect of sound absorption and scattering is better exhibited according to the indoor space in which the soundproof panel 10 is disposed. For example, as shown in FIG. 12, the second region 12 may be formed so that the attachment surface 11C and the anti-attachment surface 11D of the first region 11 are depressed. Further, as shown in FIG. 13, the vertical length is set so that the lower end side of each second region 12 is stepped, or the opening 34 is formed so as to open the upper end side of the first region 11. The flow resistance material 35 may be formed in the opening 34.
Furthermore, a sound-permeable cloth may be affixed to the surface of the soundproof panel 10 or may be painted.

  The present invention can be used mainly by arranging it like a partition or attaching it to an indoor wall surface.

1 is a schematic perspective view of a soundproof panel according to a first embodiment. FIG. 2 is a cross-sectional view of FIG. 1. The schematic front sectional drawing before shaping | molding of the shaping | molding apparatus which shape | molds the said soundproof panel. Sectional drawing similar to FIG. 3 after throwing a molding material into the cavity of the said shaping | molding apparatus. Sectional drawing similar to FIG. 3 of the state which gave the press pressure to the said molding material. The schematic perspective view of the soundproof panel which concerns on 2nd Embodiment. FIG. 7 is a cross-sectional view of FIG. 6. The schematic perspective view of the soundproof panel which concerns on 3rd Embodiment. FIG. 9 is a cross-sectional view of FIG. 8. The schematic perspective view of the soundproof panel which concerns on 4th Embodiment. The schematic perspective view of the soundproof panel which concerns on 5th Embodiment. The cross-sectional view of the soundproof panel which concerns on a modification. The schematic perspective view of the soundproof panel which concerns on another modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Soundproof panel, 11 ... 1st area | region (low density area | region), 12 ... 2nd area | region (high density area | region), 14 ... Thin part, 34 ... Opening part, M ... molding material, S ... space, W ... wall surface (formation surface)

Claims (4)

  A soundproof panel, which is integrally molded with a predetermined molding material and has areas with different molding material densities.   Including the first and second regions having a substantially constant thickness, the thickness of one of the regions is a thin portion relative to the other region, and the thin portion is a high-density region, A soundproof panel characterized in that the area excluding the portion is a low density area.   The soundproof panel according to claim 2, wherein the thin portion is formed by sinking a surface position.   The thin-walled portion is provided so that a cylindrical space can be formed between the formation surface and the thin-walled portion when the thin-walled portion is attached to a predetermined building-surface. The soundproof panel according to claim 3, further comprising an opening that communicates.

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