JP2020133281A - Sound absorbing panel - Google Patents

Abstract

To provide a sound absorbing panel which can provide a sound reduction effect with respect to the lateral and lower side of a sound source, and the extension line from the sound source to the sound absorbing panel, respectively.SOLUTION: A sound absorbing panel 1 installed on the uppermost stage of a sound-proof wall, is provided with an exterior member 10 having a front face part 11 facing the sound source side, a back face part 12, and a top surface part 14 located on the upper part of the sound absorbing panel 1, a vertical partition member 22 provided inside of the exterior member 10 and provided in the vertical direction to be located between the front face part 11 and the back face part 12, and sound absorbing members 2a, 2b provided inside of the exterior member 10. A first opening 16a and a second opening 16b are provided in the entire of the front face part 11 and the entire of the back face part 12. Further, a third opening 16c is provided on the top surface part 14.SELECTED DRAWING: Figure 2

Description

The present invention relates to a sound absorbing panel.

The sound absorbing panel installed on the uppermost stage of the soundproof wall attenuates not only the reflected sound between the walls but also the sound (diffracted sound) wrapping around from the upper side of the soundproof wall among the sounds emitted from the sound source side. As a result, the noise on the back side of the soundproof wall on the sound receiving side can be reduced. Patent Documents 1 to 4 are known as examples of sound absorbing panels.

Japanese Unexamined Patent Publication No. 2014-101747 International Publication No. 2015/11949 JP-A-2017-227680 Japanese Unexamined Patent Publication No. 2016-21344

The sound absorbing panels described in Patent Documents 1 to 4 are all installed on the uppermost stage of the soundproof wall. In the sound absorbing panels described in Patent Documents 1 to 4, sound transmitting surfaces provided with a large number of sound insertion holes are provided on each of the front portion on the sound source side and the back portion on the sound receiving side. Patent Documents 1 to 4 all utilize "edge effect suppression technology", and diffracted diffracted sound in the vicinity of the upper edge of the sound absorbing panel is absorbed and attenuated through the sound insertion hole to improve the sound reduction effect. The aim is to improve.

However, in the sound absorbing panels described in Patent Documents 1 to 4, the entire front portion and the back portion are sound transmitting surfaces, and even if the diffracted sound can be reduced, the sound transmitted through the sound absorbing panel (transmission). Sound) cannot be reduced. Therefore, if there is a sound receiving point on the extension line connecting the sound source and the sound absorbing panel installed on the uppermost stage of the soundproof wall, there is a circumstance that the noise cannot be reduced at this sound receiving point.

The present invention has been made in view of the above circumstances, and its purpose is to provide sound receiving points on the sides and below of the sound source, and on the extension line of the sound absorbing panel installed at the uppermost stage of the sound source to the soundproof wall. On the other hand, it is an object of the present invention to provide a sound absorbing panel capable of obtaining a sound reducing effect.

The sound absorbing panel according to the first invention is a sound absorbing panel installed on the uppermost stage of a sound insulating wall, and has an exterior having a front portion and a back portion facing the sound source side, and a top surface portion located above the sound absorbing panel. It is provided with a material, a vertical partition material which is installed in the exterior material and is located between the front surface portion and the back surface portion and is provided in the vertical direction, and a sound absorbing material which is installed in the exterior material. The first opening and the second opening are provided on the entire front surface portion and the entire back surface portion, respectively, and the third opening portion is provided on the top surface portion.

In the sound absorbing panel according to the second invention, in the first invention, the exterior material has a bottom surface portion that faces the top surface portion in the vertical direction, and the vertical partition material is in contact with the bottom surface portion. It is characterized in that it is internally provided in the exterior material and is provided halfway between the top surface portion and the bottom surface portion.

The sound absorbing panel according to the third invention has, in the first invention or the second invention, the sound absorbing material has a first sound absorbing material and a second sound absorbing material, and the first sound absorbing material has the front portion and the said The second sound absorbing material is located between the vertical partition material and the back surface portion and the vertical partition material.

In the sound absorbing panel according to the fourth invention, in the third invention, at least the surface of each of the first sound absorbing material and the second sound absorbing material facing the top surface portion is covered with a water-repellent member having breathability. It is characterized by.

The sound absorbing panel according to the fifth invention is characterized in that, in the third or fourth invention, each of the first sound absorbing material and the second sound absorbing material is in contact with the top surface portion.

In the first invention, the sound absorbing panel according to the sixth invention has a bottom surface portion such that the exterior material has a bottom surface portion that faces the top surface portion in the vertical direction, and the vertical partition material is in contact with the bottom surface portion. It is housed in an exterior material and is provided halfway between the top surface portion and the bottom surface portion, the sound absorbing material is made of a single sound absorbing material, and the single sound absorbing material is the upper surface of the vertical partition material and the said It is bent via the top surface portion, and is bent between the front surface portion and the vertical partition material, between the upper surface portion of the vertical partition material and the top surface portion, and between the back surface portion and the vertical partition material. It is characterized by being located in each of.

The sound absorbing panel according to the seventh invention is characterized in that, in the sixth invention, at least the surface of the single sound absorbing material facing the top surface portion is covered with a water-repellent member having breathability.

The sound absorbing panel according to the eighth invention is characterized in that, in the sixth invention or the seventh invention, the single sound absorbing material is in contact with the top surface portion.

In the third invention, the sound absorbing panel according to the ninth aspect of the invention has a bottom surface portion such that the exterior material has a bottom surface portion that faces the top surface portion in the vertical direction, and the vertical partition material is in contact with the bottom surface portion. It is housed in an exterior material and is provided halfway between the top surface portion and the bottom surface portion, the sound absorbing material has a third sound absorbing material, and the third sound absorbing material is an upper surface of the first sound absorbing material. , The upper surface of the vertical partition member and the upper surface of the second sound absorbing material are located between the top surface portion.

In the ninth aspect of the invention, the sound absorbing panel according to the tenth invention has a horizontal partitioning material provided in a plane direction in the exterior material, and the horizontal partitioning material includes at least the upper surface of the first sound absorbing material. It is characterized in that it is located between the lower surface of the third sound absorbing material.

In the ninth invention or the tenth invention, the sound absorbing panel according to the eleventh invention is provided with an overhanging portion protruding from the lower portion to the back surface side at the upper portion of the sound absorbing panel, and the third sound absorbing material is the overhanging portion. It is characterized in that it is arranged in a section.

The sound absorbing panel according to the twelfth invention is characterized in that, in any one of the ninth to eleventh inventions, the third sound absorbing material has a higher density than each of the first sound absorbing material and the second sound absorbing material. And.

In any one of the ninth to twelfth inventions, the sound absorbing panel according to the thirteenth invention has a surface of at least the top surface of the third sound absorbing material covered with a water-repellent member having breathability. It is characterized by being.

The sound absorbing panel according to the fourteenth invention is characterized in that, in any one of the ninth to thirteenth inventions, the third sound absorbing material is in contact with the top surface portion.

The sound absorbing panel according to the fifteenth invention is characterized in that, in any one of the first to fourteenth inventions, the first opening has a louver shape.

According to the first to fifteenth inventions, a sound reduction effect can be obtained for each sound receiving point on the side and bottom of the sound source and on the extension line of the sound absorbing panel installed at the uppermost stage of the sound source to the soundproof wall. Sound absorbing panels can be provided.

FIG. 1A is a schematic front view showing an example of a sound absorbing panel according to the first embodiment of the present invention. FIG. 1B is a schematic rear view showing an example of a sound absorbing panel according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIGS. 1 (a), 1 (b) and FIG. FIG. 3 is a schematic top view showing an example of a sound absorbing panel according to the first embodiment of the present invention. FIG. 4 is a schematic front view showing an example of a soundproof wall in which the sound absorbing panel according to the first embodiment of the present invention is used. FIG. 5 is a schematic rear view showing an example of a soundproof wall in which the sound absorbing panel according to the first embodiment of the present invention is used. FIG. 6 is a schematic view showing a state of sound insulation by a soundproof wall provided with a sound absorbing panel according to a reference example. FIG. 7 is a schematic view showing a state of sound insulation by a soundproof wall provided with a sound absorbing panel according to the first embodiment of the present invention. FIG. 8 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a second embodiment of the present invention. FIG. 9 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a third embodiment of the present invention. FIG. 10 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a fourth embodiment of the present invention. FIG. 11 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a fifth embodiment of the present invention. FIG. 12 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a sixth embodiment of the present invention. 13 (a) to 13 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to a seventh embodiment of the present invention. 14 (a) to 14 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to an eighth embodiment of the present invention. 15 (a) to 15 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to a ninth embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described with reference to the drawings. In each figure, the vertical direction is the vertical direction Z and intersects the vertical direction Z, for example, one orthogonal plane direction is defined as the first plane direction X and intersects each of the vertical direction Z and the first plane direction X, for example. Let another plane direction orthogonal to each other be the second plane direction Y. Further, in each figure, common reference numerals are given to common parts, and duplicate description is omitted.

(First Embodiment)
FIG. 1A is a schematic front view showing an example of a sound absorbing panel according to the first embodiment of the present invention. FIG. 1B is a schematic rear view showing an example of a sound absorbing panel according to the first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIGS. 1 (a), 1 (b) and FIG. FIG. 3 is a schematic top view showing an example of a sound absorbing panel according to the first embodiment of the present invention.

As shown in FIGS. 1A to 3, the sound absorbing panel 1 according to an example of the first embodiment includes an exterior material 10, a vertical partition member 22, and sound absorbing materials (2a, 2b). The exterior material 10 has, for example, a front plate (front portion) 11, a back plate (rear portion) 12, and a top surface portion 14. The front plate 11 is directed toward the sound source. The back plate 12 is directed to the sound receiving side. The top surface portion 14 is located above the sound absorbing panel 1. The front plate 11 and the back plate 12 are separated from each other in the second plane direction Y and face each other. At least one upper portion of the front plate 11 and the back plate 12 is bent into an L shape, for example, and constitutes the top surface portion 14. A top plate may be separately provided as the top surface portion 14. At least one lower portion of the front plate 11 and the back plate 12 is bent into an L shape, for example, and constitutes a bottom surface portion 15. The bottom surface portion 15 faces the top surface portion 14 in the vertical direction Z. A bottom plate may be separately provided as the bottom surface portion 15. One example of the front plate 11 is, for example, an aluminum plate. One example of the back plate 12 is, for example, a highly weather resistant galvanized steel sheet.

The vertical partition member 22 is arranged in a space surrounded by each of the front plate 11, the back plate 12, the top surface portion 14, and the bottom surface portion 15. As a result, the vertical partition member 22 is installed in the exterior material 10. The vertical partition member 22 is located between the front plate 11 and the back plate 12 and is provided in the vertical direction Z. In the sound absorbing panel 1, the vertical partition member 22 is in contact with each of the top surface portion 14 and the bottom surface portion 15. As a result, the exterior material 10 includes a first interior space surrounded by each of the front plate 11, the vertical partition member 22, the top surface portion 14, and the bottom surface portion 15, and the back plate 12, the vertical partition member 22, and the top surface portion 14. , And a second interior space surrounded by each of the bottom surface portion 15.

As the vertical partition member 22, a metal plate-shaped member, a rubber or lead sheet-shaped member, a high-density cloth member (for example, a soundproof curtain, a soundproof curtain), or the like can be used. In this embodiment, the case where a metal plate-shaped member is used will be described.

The sound absorbing material of the sound absorbing panel 1 includes a first sound absorbing material 2a and a second sound absorbing material 2b. The first sound absorbing material 2a is arranged in the first interior space and is located between the front plate 11 and the vertical partition member 22. The second sound absorbing material 2b is arranged in the second interior space and is located between the back plate 12 and the vertical partition member 22. As a result, each of the first sound absorbing material 2a and the second sound absorbing material 2b is installed in the exterior material 10. The first and second sound absorbing materials 2a and 2b are, for example, polyester fiber non-woven fabric and glass wool.

The front plate 11 is provided with a plurality of first openings 16a for transmitting sound. These first openings 16a are provided on the entire front plate 11. It should be noted that the term "whole" as used herein not only indicates the complete whole, but also the substantial or de facto whole as shown in FIGS. 1A and 1B. Almost the whole) shall also be shown. The shape of each of the first openings 16a in a plan view is, for example, a circle. The back plate 12 is provided with a plurality of second openings 16b for transmitting sound. These second openings 16b are provided on the entire back surface plate 12. The shape of each of the second openings 16b in a plan view is, for example, circular. The top surface portion 14 is provided with a plurality of third openings 16c for transmitting sound. These third openings 16c are provided on the entire top surface portion 14. The shape of each of the third openings 16c in a plan view is, for example, circular. As a result, in the sound absorbing panel 1, substantially the entire front plate 11, substantially the entire back plate 12, and substantially the entire top surface portion 14 become sound transmitting surfaces that transmit sound.

FIG. 4 is a schematic front view showing an example of a soundproof wall in which the sound absorbing panel according to the first embodiment of the present invention is used. FIG. 5 is a schematic rear view showing an example of a soundproof wall in which the sound absorbing panel according to the first embodiment of the present invention is used.

As shown in FIGS. 4 and 5, the soundproof wall 100 includes a sound absorbing panel 1, an intermediate sound absorbing panel 3, and a support column 4. The columns 4 are erected at the designed intervals, for example, on the wall railings 150 of the road. The intermediate sound absorbing panels 3 are arranged between the columns 4, for example, along the first plane direction X and in the vertical direction Z. The sound absorbing panel 1 is installed on the uppermost stage of the soundproof wall 100 in which a plurality of intermediate sound absorbing panels 3 are arranged in the vertical direction Z. The intermediate sound absorbing panel 3 may be installed in only one stage along the first plane direction X. Further, the intermediate sound absorbing panel 3 may be omitted, and only the sound absorbing panel 1 may be installed side by side along the first plane direction X.

The intermediate sound absorbing panel 3 includes an exterior material and a sound absorbing material, similarly to the sound absorbing panel 1. Similar to the sound absorbing panel 1, the exterior material of the intermediate sound absorbing panel 3 also has, for example, a front plate (front portion) 31 and a back plate (back portion) 32. The front plate 31 is directed toward the sound source. The back plate 32 is directed to the sound receiving side. The sound absorbing material (not shown) is installed in the exterior material. The front plate 31 is provided with a plurality of fourth openings 36 for transmitting sound. These fourth openings 36 are provided on the front plate 31 as a whole. The fourth opening 36 has, for example, a louver shape. With respect to such a front plate 31, the back plate 32 is not provided with an opening for transmitting sound. As a result, on the back side of the soundproof wall 100, the second opening 16b for transmitting sound is provided only on the sound absorbing panel 1 installed at the uppermost stage of the soundproof wall 100.

According to the soundproof wall 100 provided with such a sound absorbing panel 1, for example, the advantages described below can be obtained.

FIG. 6 is a schematic view showing a state of sound insulation by a soundproof wall provided with a sound absorbing panel according to a reference example. FIG. 7 is a schematic view showing a state of sound insulation by a soundproof wall provided with a sound absorbing panel according to the first embodiment of the present invention. The soundproof wall is provided, for example, on the wall column 201 of the viaduct 200.

As shown in FIG. 6, in the sound absorbing panel 1r according to the reference example, openings for transmitting sound are provided in the entire front plate 11r and the back plate 12r, respectively. In the soundproof wall 100r provided with such a sound absorbing panel 1r, the diffracted sound DS diffracted in the vicinity of the upper edge of the sound absorbing panel 1r is absorbed through the opening, so that the diffracted sound DS can be attenuated. As a result, the sound diffracted sound by the sound absorbing panel 1r is applied to the sound receiving points A on the side and below the soundproof wall 100r, for example, the residents and users of the building 300 on the side and below the soundproof wall 100r. A sound reduction effect on the DS can be obtained.

That is, in the case of reducing the diffracted sound DS that tries to diffract the vicinity of the upper edge of the sound absorbing panel 1r installed at the uppermost stage, the "edge effect suppressing technique" is used. With this technology, when the sound gets over a thick wall, it becomes a concentric wave surface centered on the front side upper edge corner 19a and the back side upper edge corner 19b, and it is as if the sound source is in the center of the concentric circle. Therefore, it is possible to effectively absorb sound by arranging a function capable of absorbing sound in the vicinity of this area.

However, the transmitted sound TS is generated on the extension line I of the sound absorbing panel 1r installed at the uppermost stage of the sound source SS to the soundproof wall 100r. Therefore, the sound receiving point B on the extension line I, for example, the sound source (one example is the road surface of the viaduct 200) to the building 350 on the extension line of the sound absorbing panel, for example, residents and users of condominiums, buildings, etc. On the other hand, it is difficult to expect a sound reduction effect on the transmitted sound TS.

With respect to such a reference example, according to the soundproof wall 100 provided with the sound absorbing panel 1 according to the first embodiment, as shown in FIG. 7, the sound source SS to the extension line I of the sound absorbing panel 1 are to be transmitted. The transmitted sound TS can be insulated by the vertical partition member 22 built in the exterior material 10. As a result, the sound reduction effect can be obtained even at the sound receiving point B on the extension line I, for example, the building 350.

Further, in the sound absorbing panel 1, substantially the entire front plate 11 and substantially the entire back plate 12 are sound transmitting surfaces. Therefore, the sound reduction effect can be obtained also for the diffracted sound DS that tries to diffract the vicinity of the upper edge of the sound absorbing panel 1. As a result, the sound reducing effect of the sound absorbing panel 1 is also applied to the sound receiving points A on the side and below the soundproof wall 100, for example, the residents and users of the building 300 on the side and below the soundproof wall. can get. Moreover, in the sound absorbing panel 1, the third opening 16c is provided on the top surface portion 14. As a result, substantially the entire top surface portion 14, for example, becomes a further sound transmitting surface. The top surface portion 14 is located between the front plate 11 and the back plate 12, and connects the front side upper edge corner portion 19a and the back side upper edge corner portion 19b. Therefore, the distance that can be absorbed in the upper part of the sound absorbing panel 1 can be increased as compared with the case where the top surface portion 14 is not provided with the opening. As a result of increasing the sound absorbing distance, the sound reducing effect of the diffracted sound DS can be further enhanced. In the sound absorbing panel 1r according to the above-mentioned reference example, the opening for transmitting sound is not provided on the top surface.

According to such a sound absorbing panel 1, substantially the entire front plate 11, substantially the entire back plate 12, and substantially the entire top surface 14 serve as sound transmitting surfaces, which affects the residents under the viaduct 200. In addition to being able to absorb the diffracted sound DS, since the vertical partition material 22 is built in the exterior material 10, this part also has the function of a sound insulation plate, so that the transmission that affects the residents located above the road surface of the viaduct 200 Sound TS can also be reduced.

Therefore, according to the first embodiment, sound is reduced for each sound receiving point on the side and bottom of the sound source SS and on the extension line of the sound absorbing panel 1 installed at the uppermost stage of the sound source SS to the soundproof wall 100. It is possible to obtain the sound absorbing panel 1 which can obtain the effect at the same time.

Further, according to the first embodiment, the soundproof wall 100 provided with such a sound absorbing panel 1 and the soundproof wall 100 having the sound absorbing panel 1 at the uppermost stage and the intermediate sound absorbing panels 3 arranged in at least one stage in the vertical direction Z. Can be obtained.

The sound absorbing panel 1 and the soundproof wall 100 provided with the sound absorbing panel 1 can be effectively used, for example, on roads, bridges, etc. on which automobiles and the like travel, and further, noise is generated in urban areas, plain areas, and mountains. It can be reduced in various places such as a part and a digging part. Of course, the sound absorbing panel 1 and the sound barrier 100 provided with the sound absorbing panel 1 are not limited to roads on which automobiles and the like travel, but also on various railroad tracks on which track-type, cableway-type, and levitation-type railways travel, as well as neighboring residents. It can also be applied to noise sources such as factories, schools, and nurseries that require careful noise control.

(Second Embodiment)
FIG. 8 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a second embodiment of the present invention. The schematic cross section shown in FIG. 8 corresponds to the schematic cross section shown in FIG.

As shown in FIG. 8, the sound absorbing panel 1b according to the second embodiment is different from the sound absorbing panel 1 in that the vertical partition member 22 is in contact with the bottom surface portion 15 and is installed in the exterior material 10 to be in contact with the top surface portion 14. It is provided halfway between the bottom surface portion 15. The vertical partition member 22 has a portion that is not in contact with or is not in contact with the top surface portion 14. As a result, the sound absorbing panel 1b has a gap between the upper surface of the vertical partition member 22 and the top surface portion 14. An example of the gap is provided along the first plane direction X, for example, from one side end to the other side end of the sound absorbing panel 1. Since the sound absorbing panel 1b has a gap, the height of the vertical partition member 22 along the vertical direction Z is the height of the front plate 11 along the vertical direction Z and the height of the back plate 12 along the vertical direction Z. For example, it is lower than each of the above.

Further, in the sound absorbing panel 1b, the sound absorbing material may be a single sound absorbing material 2. In this case, the width of the gap along the first plane direction X is made wider, for example, than the width of the single sound absorbing material 2 along the first plane direction X. The single sound absorbing material 2 is bent on the upper surface of the vertical partition member 22 through a gap, and is between the front plate 11 and the vertical partition member 22, and between the upper surface of the vertical partition member 22 and the top surface portion 14. And located between the back plate 12 and the vertical partition 22 respectively.

According to such a sound absorbing panel 1b, the same advantages as those of the sound absorbing panel 1 can be obtained. Further, according to the sound absorbing panel 1b, as compared with the case where the vertical partition member 22 is in contact with each of the top surface portion 14 and the bottom surface portion 15 as in the sound absorbing panel 1, the vertical partition member 22 is along the vertical direction Z. The height can be lowered. Therefore, the weight of the vertical partition member 22 can be reduced. As a result, the sound absorbing panel 1b can be made lighter than the sound absorbing panel 1. By reducing the weight of the sound absorbing panel 1b, it is possible to reduce the labor of field workers, for example, when installing the sound absorbing panel 1b on the uppermost stage of the soundproof wall 100. As described above, according to the sound absorbing panel 1b, it is possible to obtain the advantage that the workability of the work can be improved when the soundproof wall 100 is installed.

Further, the sound absorbing panel 1b can promote the miniaturization of the vertical partition member 22 as compared with the sound absorbing panel 1. As a result, in the sound absorbing panel 1b, for example, the amount of metal or the like used can be reduced, and the advantage of improving resource efficiency can be obtained.

Further, according to the sound absorbing panel 1b, for example, the place where the first sound absorbing material 2a and the second sound absorbing material 2b were required in the first embodiment can be made into one of the single sound absorbing materials 2. As a result, the number of parts of the sound absorbing panel 1b can be reduced as compared with that of the sound absorbing panel 1. By reducing the number of parts, the sound absorbing panel 1b can also have an advantage that, for example, the manufacturing cost can be reduced as compared with the sound absorbing panel 1.

Such a sound absorbing panel 1b can be manufactured, for example, as follows.
First, for example, a front plate 11 having a bottom surface portion 15 and a vertical partition member 22, a back plate 12 having a top surface portion 14, and a single sound absorbing material 2 are prepared. The vertical partition member 22 is attached to, for example, the bottom surface portion 15.

Next, the single sound absorbing material 2 is inserted between the front plate 11 and the vertical partition member 22. Next, the single sound absorbing material 2 is bent into a U shape toward the bottom surface portion 15 with the upper surface of the vertical partition member 22 as a fulcrum, for example. Next, the back plate 12 having the top surface portion 14 is put on the single sound absorbing material 2. Next, the top surface portion 14 of the back plate 12 is attached to the front plate 11 by, for example, screwing, and the bottom surface portion 15 of the front plate 11 is attached to the back plate 12, for example, by screwing.

The sound absorbing panel 1b can be manufactured in this way, for example. In the manufacturing method described above, the front plate 11 has a bottom surface portion 15 and a vertical partition member 22, and the back surface plate 12 has a top surface portion 14. On the contrary, the back plate 12 may have the bottom surface portion 15 and the vertical partition member 22, and the front surface plate 11 may have the top surface portion 14. Further, the bottom surface portion 15 may be a bottom plate to which the vertical partition member 22 is attached.

(Third Embodiment)
FIG. 9 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a third embodiment of the present invention. The schematic cross section shown in FIG. 9 corresponds to the schematic cross section shown in FIG.

As shown in FIG. 9, the sound absorbing panel 1c according to the third embodiment is different from the sound absorbing panel 1b in that it is different from the first sound absorbing material 2a and the first sound absorbing material 2a instead of the single sound absorbing material 2. It is to include a third sound absorbing material 2c, which is different from each of the second sound absorbing material 2b, the first and second sound absorbing materials 2a and 2b.

The first sound absorbing material 2a is located between the front plate 11 and the vertical partition member 22. The second sound absorbing material 2b is located between the back plate 12 portion and the vertical partition member 22. The third sound absorbing material 2c is located between the upper surface of the first sound absorbing material 2a, the upper surface of the vertical partition member 22, the upper surface of the second sound absorbing material 2b, and the top surface portion 14.

There is no vertical partition member 22 in the upper portion 23a of the sound absorbing panel 1c. Thereby, the sound absorbing panel 1c can be divided into two parts, for example, an upper portion 23a and a vertical partition member 22, for example, a lower portion 23b. The sound absorbing material can be separated from the upper portion 23a and the lower portion 23b. Therefore, like the sound absorbing panel 1c, the third sound absorbing material 2c, which is installed in the exterior material 10 through the gap between the upper surface of the vertical partition member 22 and the top surface portion 14, is the first and second sound absorbing materials 2a. And 2b may be separate from each other.

When the third sound absorbing material 2c is separated from the first and second sound absorbing materials 2a and 2b, the density of the third sound absorbing material 2c is set to that of the first sound absorbing material 2a and the second sound absorbing material 2b. It is possible to change each.

For example, the density of the first sound absorbing material 2a is "ρa", the density of the second sound absorbing material 2b is "ρb", and the density of the third sound absorbing material 2c is "ρc". When the density of the sound absorbing material is high, the sound absorbing effect tends to increase. According to this tendency, the density ρc of the third sound absorbing material 2c is made larger than the density ρa of the first sound absorbing material 2a and the density ρb of the second sound absorbing material 2b (ρc> ρa and ρc> ρb).

When the density ρc is made larger than each of the densities ρa and ρb in this way, the third sound absorbing material 2 is compared with the case where the densities are substantially equal to those of the first and second sound absorbing materials 2a and 2b, respectively. Therefore, it is possible to further obtain the advantage that the sound absorbing effect of the diffracted sound DS diffracted near the upper edge of the sound absorbing panel 1c can be further enhanced. In the sound absorbing panel 1c, it is assumed that the density ρa is the same as the density ρb, for example (ρa = ρb). However, the density ρa may be different from the density ρb (ρa ≠ ρb).

(Fourth Embodiment)
FIG. 10 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a fourth embodiment of the present invention. The schematic cross section shown in FIG. 10 corresponds to the schematic cross section shown in FIG.

As shown in FIG. 10, the difference between the sound absorbing panel 1d according to the fourth embodiment and the sound absorbing panel 1c is that the horizontal partition member 23 provided in the second plane direction Y is provided in the space of the exterior material 10. To be prepared further. Similar to the vertical partition member 22, the horizontal partition member 23 also uses a metal plate-shaped member, a rubber or lead sheet-shaped member, a high-density cloth member (for example, a soundproof curtain, a soundproof curtain), or the like. Can be done. In this embodiment, the case where a metal plate-shaped member is used will be described. The horizontal partition member 23 connects the front plate 11 and the upper surface of the vertical partition member 22, and is located between the upper surface of the first sound absorbing material 2a and the lower surface of the third sound absorbing material 2c. The horizontal partition member 23 can also connect the back plate 12 and the vertical partition member 22, for example, the upper surface. Further, the horizontal partition member 23 can be connected to the front plate 11 and the back plate 12 from the upper side surface of the vertical partition member 22.

When the front plate 11 and the vertical partition member 22, for example, the upper surface are connected by the horizontal partition member 23 as in the sound absorbing panel 1d, the sound reflected by the vertical partition member 22 is transmitted by the horizontal partition member 23 to the front plate. It can be reflected toward the sound source SS on the 11 side. This makes it possible to further reduce the noise at the sound receiving point B. Such an advantage can be obtained, for example, by locating the horizontal partition member 23 between at least the upper surface of the first sound absorbing material 2a and the lower surface of the third sound absorbing material 2c.

Further, even when the horizontal partition member 23 is further provided in the space provided by the exterior material 10, the density ρc of the third sound absorbing material 2c, the density ρa of the first sound absorbing material 2a, and the second sound absorbing material 2b Can be greater than each of the densities ρb of (ρc> ρa and ρc> ρb).

(Fifth Embodiment)
FIG. 11 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a fifth embodiment of the present invention. The schematic cross section shown in FIG. 11 corresponds to the schematic cross section shown in FIG.

As shown in FIG. 11, the sound absorbing panel 1e according to the fifth embodiment is different from the sound absorbing panel 1c in that the overhanging portion 24 is provided on the upper part of the sound absorbing panel 1e. The overhanging portion 24 projects toward the back surface side from the lower portion of the sound absorbing panel 1e. In the sound absorbing panel 1e, for example, the thickness T1 of the top surface portion 14 along the second plane direction Y is larger than the thickness T2 of the bottom surface portion 15 along the second plane direction. The third sound absorbing material 2c is arranged on the overhanging portion 24.

The sound absorbing effect of the diffracted sound DS diffracted near the upper edge of the sound absorbing panel 1e increases, for example, as the thickness of the sound absorbing material existing along the top surface portion 14 increases. This is because when the third opening 16c is provided on the top surface portion 14 of the sound absorbing panel 1e and the top surface portion 14 is used as the sound absorbing portion, the sound absorbing portion becomes long. According to this tendency, the overhanging portion 24 is provided on the upper part of the sound absorbing panel 1e, and the third sound absorbing material 2c is placed in the space of the overhanging portion 24 along the second plane direction Y, for example, the space of the overhanging portion 24. Place it all over. As a result, the sound absorbing panel 1e has a longer sound absorbing portion than, for example, the sound absorbing panel 1c, and the sound absorbing effect of the diffracted sound DS can be further enhanced.

Further, the overhanging portion 24 of the sound absorbing panel 1e may be projected toward the back surface side in the direction of the back surface plate 12. As a result, the overhanging portion 24 does not protrude toward the road surface side, and for example, the contact between the sound absorbing panel 1e and the vehicle and the traveling of the vehicle are not hindered.

Such a sound absorbing panel 1e has an advantage that the sound absorbing effect of the diffracted sound DS can be improved, and when the sound absorbing wall 100 is installed on the uppermost stage of the sound insulating wall 100, the sound insulating wall 100 with maintained safety can be obtained. it can.

Further, the fourth opening 16d can be further provided on the lower surface of the overhanging portion 24. When the fourth opening 16d is provided on the lower surface of the overhanging portion 24, the lower surface of the overhanging portion 24 can also be a sound absorbing portion. As a result, the diffracted sound DS generated at the corner where the lower surface extending in the second plane direction Y of the overhanging portion 24 and the back surface extending in the vertical direction Z of the overhanging portion 24 intersect is generated by the lower surface of the overhanging portion 24. In, the sound can be further absorbed. As a result, in the sound absorbing panel 1e provided with the overhanging portion 24 protruding on the back side, for example, the sound receiving points A on the side and below the soundproof wall 100 are compared with the case where the fourth opening 16d is not provided. In the above, the advantage that the sound reduction effect on the diffracted sound DS can be further enhanced can be further obtained.

(Sixth Embodiment)
FIG. 12 is a schematic cross-sectional view showing an example of a sound absorbing panel according to a sixth embodiment of the present invention. The schematic cross section shown in FIG. 12 corresponds to the schematic cross section shown in FIG.

As shown in FIG. 12, the sound absorbing panel 1f according to the sixth embodiment is different from the sound absorbing panel 1 in that the shape of the first opening 16a is a louver shape.

Since the sound absorbing panel 1f is arranged at the uppermost stage of the soundproof wall 100, noise from a vehicle or the like is emitted from below when viewed from the front of the sound absorbing panel 1f. By forming the first opening 16a into a louver shape, the sound emitted from below the sound absorbing panel 1f can be efficiently taken in from the first opening 16a, and the sound absorbing property is improved.

Further, in the louver shape, since there is a canopy-shaped portion on the first opening 16a, there is an advantage that rainwater or the like is less likely to enter the inside of the exterior material 10.

In addition to the first embodiment, the sixth embodiment can be combined with any of the second to fifth embodiments.

(7th Embodiment)
13 (a) to 13 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to a seventh embodiment of the present invention. The schematic cross section shown in FIGS. 13 (a) to 13 (c) corresponds to the schematic cross section shown in FIG.

<7th Embodiment: 1st example>
As shown in FIG. 13A, the sound absorbing panel 1ga according to the first example of the seventh embodiment is different from the sound absorbing panel 1, in that the surfaces of the first sound absorbing material 2a and the second sound absorbing material 2b are different from each other. It is covered with a water-repellent member 21 having breathability.

When the third opening 16c is provided on the top surface 14, rainwater or the like may permeate through the third opening 16c into each of the first sound absorbing material 2a and the second sound absorbing material 2b, thereby lowering the sound absorbing performance. There is. In response to such circumstances, by covering the surfaces of the first sound absorbing material 2a and the second sound absorbing material 2b with a water repellent member 21 having breathability, the first sound absorbing material 2a and the second sound absorbing material 2b can be obtained. It is possible to prevent the infiltration of rainwater, etc., and maintain the sound absorption performance. Further, although not shown, even if the top surface portion 14 of the exterior material is not provided, at least the upper surface of each of the first sound absorbing material 2a and the second sound absorbing material 2b is covered with a water-repellent member 21 having breathability. Therefore, it is possible to prevent rainwater or the like from penetrating into the first sound absorbing material 2a and the second sound absorbing material 2b, and it is possible to maintain the sound absorbing performance. This also applies to the eighth embodiment and the ninth embodiment described later.

The water repellent member 21 may, for example, treat the surface layer of the first sound absorbing material 2a and the surface layer of the second sound absorbing material 2b with water repellent treatment, or the surface of the first sound absorbing material 2a and the surface of the second sound absorbing material 2b. Each one
It can be obtained by covering with a water-repellent cloth or the like.

Further, the water-repellent member 21 of the sound-absorbing panel 1ga covers almost all surfaces of the first sound-absorbing material 2a and the second sound-absorbing material 2b, for example. However, the water-repellent member 21 may cover at least the surface of each of the first sound absorbing material 2a and the second sound absorbing material 2b facing the top surface portion 14. Even in this way, it is possible to suppress a decrease in sound absorption performance due to permeation of rainwater or the like.

<7th Embodiment: 2nd Example>
As shown in FIG. 13B, the sound absorbing panel 1gb according to the second example of the seventh embodiment is different from the sound absorbing panel 1, in that each of the first sound absorbing material 2a and the second sound absorbing material 2b has a top surface portion. It is in contact with 14.

When the third opening 16c is provided on the top surface portion 14, if there is a gap between each of the first sound absorbing material 2a and the second sound absorbing material 2b and the top surface portion 14, rainwater or the like will flow from the gap. It may enter the inside of the sound absorbing panel gb and stay in water, causing corrosion of the exterior material 10 and deterioration of the first sound absorbing material 2a and the second sound absorbing material 2b. For example, a gap is provided between each of the first sound absorbing material 2a and the second sound absorbing material 2b and the top surface portion 14 so that each of the first sound absorbing material 2a and the second sound absorbing material 2b is in contact with the top surface portion 14. By not providing the above, it is possible to suppress the retention of water in the gap and prevent the stagnant rainwater or the like from entering the inside of the sound absorbing panel 1 gb. Even in this way, the sound absorbing performance can be maintained.

<7th Embodiment: 3rd Example>
As shown in FIG. 13 (c), the sound absorbing panel 1 gc according to the third example of the seventh embodiment is different from the sound absorbing panel 1 gb in that at least the surface facing the top surface portion 14 is a water repellent member having breathability. The first and second sound absorbing materials 2a and 2b covered with 21 are in contact with the top surface portion 14. In this way, it is also possible to combine the first example and the second example.

According to the sound absorbing panel 1 gc, the surface facing the top surface portion 14 is in contact with the first and second sound absorbing materials 2a and 2b covered with the water-repellent member 21 having breathability, and the top surface portion 14 is brought into contact with the gap. Since the water retention of water can be suppressed and the surfaces of the first and second sound absorbing materials 2a and 2b are water repellent, the sound absorbing performance can be maintained even better.

(8th Embodiment)
14 (a) to 14 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to an eighth embodiment of the present invention. The schematic cross section shown in FIGS. 14 (a) to 14 (c) corresponds to the schematic cross section in the vicinity of the top surface portion 14 of the sound absorbing panel 1b shown in FIG.

<8th Embodiment: 1st Example>
As shown in FIG. 14A, the sound absorbing panel 1ha according to the first example of the eighth embodiment is different from the sound absorbing panel 1b in that at least the surface of the single sound absorbing material 2 facing the top surface 14 is ventilated. It is covered with a water-repellent member 21 having a property.

It is also possible to combine the second embodiment and the first example of the seventh embodiment as in the sound absorbing panel 1ha.

According to the sound absorbing panel 1ha, the same advantages as those of the sound absorbing panel 1b according to the second embodiment can be obtained, and like the sound absorbing panel 1ga, the deterioration of the sound absorbing performance due to the penetration of rainwater or the like can be suppressed. Can be obtained.

<8th Embodiment: 2nd Example>
As shown in FIG. 14B, the sound absorbing panel 1hb according to the second example of the eighth embodiment is different from the sound absorbing panel 1b in that the single sound absorbing material 2 is in contact with the top surface portion 14.

It is also possible to combine the second embodiment and the second example of the seventh embodiment as in the sound absorbing panel 1hb.

According to the sound absorbing panel 1hb, the same advantages as the sound absorbing panel 1b according to the second embodiment can be obtained, and unlike the sound absorbing panel 1gb, water retention in the gap can be suppressed, and the accumulated rainwater or the like can be collected from the sound absorbing panel 1hb. You can get the advantage that you can prevent it from getting inside.

<8th Embodiment: 3rd Example>
As shown in FIG. 14C, the sound absorbing panel 1hc according to the third example of the eighth embodiment is different from the sound absorbing panel 1hb in that at least the surface facing the top surface portion 14 is a water repellent member having breathability. The single sound absorbing material 2 covered with 21 is in contact with the top surface portion 14.

It is also possible to combine the second embodiment and the third example of the seventh embodiment as in the sound absorbing panel 1hc.

According to the sound absorbing panel 1hc, the same advantages as the sound absorbing panel 1b according to the second embodiment can be obtained, water retention in the gap can be suppressed like the sound absorbing panel 1gc, and the surface of the single sound absorbing material 2 can be suppressed. Since is water repellent, it is possible to obtain the advantage that the sound absorbing performance can be maintained even better.

(9th Embodiment)
15 (a) to 15 (c) are schematic cross-sectional views showing an example of a sound absorbing panel according to a ninth embodiment of the present invention. The schematic cross section shown in FIGS. 15 (a) to 15 (c) corresponds to the schematic cross section in the vicinity of the top surface portion 14 of the sound absorbing panel 1c shown in FIG.

<9th Embodiment: 1st Example>
As shown in FIG. 15A, the sound absorbing panel 1ia according to the first example of the ninth embodiment is different from the sound absorbing panel 1c in that at least the surface of the third sound absorbing material 2c facing the top surface 14 is ventilated. It is covered with a water-repellent member 21 having a property.

It is also possible to combine the third embodiment and the first example of the seventh embodiment as in the sound absorbing panel 1ia.

According to the sound absorbing panel 1ia, the same advantages as those of the sound absorbing panel 1c according to the third embodiment can be obtained, and like the sound absorbing panel 1ga, the deterioration of the sound absorbing performance due to the penetration of rainwater or the like can be suppressed. Can be obtained.

<9th Embodiment: 2nd Example>
As shown in FIG. 15B, the sound absorbing panel 1ib according to the second example of the ninth embodiment is different from the sound absorbing panel 1c in that the third sound absorbing material 2c is in contact with the top surface portion 14.

It is also possible to combine the third embodiment and the second example of the seventh embodiment, such as the sound absorbing panel 1ib.

According to the sound absorbing panel 1ib, the same advantages as the sound absorbing panel 1c according to the third embodiment can be obtained, and like the sound absorbing panel 1gb, water retention in the gap can be suppressed, and the accumulated rainwater or the like can be collected from the sound absorbing panel 1ib. You can get the advantage that you can prevent it from getting inside.

<9th Embodiment: 3rd Example>
As shown in FIG. 15C, the sound absorbing panel 1ic according to the third example of the ninth embodiment is different from the sound absorbing panel 1ib in that at least the surface facing the top surface portion 14 is a water repellent member having breathability. The third sound absorbing material 2c covered with 21 is in contact with the top surface portion 14.

It is also possible to combine the third embodiment and the third example of the seventh embodiment, such as the sound absorbing panel 1ic.

According to the sound absorbing panel 1ic, the same advantages as those of the sound absorbing panel 1c according to the third embodiment can be obtained, water retention in the gap can be suppressed like the sound absorbing panel 1 gc, and the surface of the single sound absorbing material 2 can be suppressed. Since is water repellent, it is possible to obtain the advantage that the sound absorbing performance can be maintained even better.

It should be noted that each of the examples of the seventh embodiment to the ninth embodiment can be combined with the sixth embodiment.

As described by the above-described embodiment, according to the embodiment of the present invention, with respect to each of the side and the lower side of the sound source and the extension line of the sound absorbing panel installed at the uppermost stage of the sound source to the soundproof wall. It is possible to provide a sound absorbing panel capable of obtaining a sound reducing effect.

Although some of the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. For example, although the intermediate sound absorbing panel 3 is illustrated in FIGS. 4 and 5, other panels such as a light transmitting plate and a concrete plate may be used as the panel. Moreover, these embodiments can be carried out in combination as appropriate. Furthermore, the present invention can be implemented in various novel embodiments in addition to the above-mentioned some embodiments. Therefore, each of the above-mentioned several embodiments can be omitted, replaced, or changed in various ways without departing from the gist of the present invention. Such novel forms and modifications are included in the scope and gist of the present invention, as well as in the scope of the invention described in the claims and the equivalent of the invention described in the claims.

1: Sound absorbing panel (first embodiment)
1b: Sound absorbing panel (second embodiment)
1c: Sound absorbing panel (third embodiment)
1d: Sound absorbing panel (fourth embodiment)
1e: Sound absorbing panel (fifth embodiment)
1f: Sound absorbing panel (sixth embodiment)
1ga to 1gc: Sound absorbing panel (7th embodiment: 1st to 3rd examples)
1ha to 1hc: Sound absorbing panel (8th embodiment: 1st to 3rd examples)
1ia to 1ic: Sound absorbing panel (9th embodiment: 1st to 3rd examples)
10: Exterior material 11: Front plate (front part)
12: Back plate (back part)
14: Top surface portion 15: Bottom surface portion 16a: First opening 16b: Second opening 16c: Third opening 16d: Fourth opening 19a: Front side upper edge corner 19b: Back side upper edge corner 1r: Sound absorbing panel (reference example)
11r: Front plate 12r: Back plate 2: Single sound absorbing material 2a: First sound absorbing material 2b: Second sound absorbing material 2c: Third sound absorbing material 21: Water repellent member 22: Vertical partitioning material 23: Horizontal partitioning material 23a: Upper Part 23b: Lower part 24: Overhanging part 3: Intermediate sound absorbing panel 31: Front plate (front part)
32: Back plate (back part)
36: Fourth opening 4: Support 100: Soundproof wall (first embodiment)
100r: Soundproof wall (reference example)
150: Wall balustrade 200: Viaduct 201: Viaduct wall balustrade 300: Building 350: Building T1: Thickness of top surface portion 14 along second plane direction Y T2: Thickness of bottom surface portion 15 along second plane direction Y DS: Diffracted sound TS: Transmitted sound SS: Sound source I: Extension line

Claims (15)

It is a sound absorbing panel installed on the top of the soundproof wall.
An exterior material having a front portion and a back portion facing the sound source side, and a top surface portion located above the sound absorbing panel,
A vertical partition material which is installed in the exterior material and is located between the front portion and the back portion and is provided in the vertical direction.
The sound absorbing material incorporated in the exterior material is provided.
The first opening and the second opening are provided on the entire front portion and the entire back portion, respectively.
A sound absorbing panel characterized in that a third opening is provided on the top surface portion. The exterior material has a bottom surface portion that faces the top surface portion in the vertical direction.
The sound absorbing panel according to claim 1, wherein the vertical partition member is provided in the exterior material in contact with the bottom surface portion and is provided halfway between the top surface portion and the bottom surface portion. .. The sound absorbing material is
With the first sound absorbing material,
Has a second sound absorbing material
The first sound absorbing material is located between the front surface portion and the vertical partition material.
The sound absorbing panel according to claim 1 or 2, wherein the second sound absorbing material is located between the back surface portion and the vertical partitioning material. The sound absorbing panel according to claim 3, wherein at least a surface of each of the first sound absorbing material and the second sound absorbing material facing the top surface portion is covered with a water-repellent member having breathability. The sound absorbing panel according to claim 3 or 4, wherein each of the first sound absorbing material and the second sound absorbing material is in contact with the top surface portion. The exterior material has a bottom surface portion that faces the top surface portion in the vertical direction.
The vertical partition member is provided in the exterior material in contact with the bottom surface portion, and is provided halfway between the top surface portion and the bottom surface portion.
The sound absorbing material is
Consists of a single sound absorbing material
The single sound absorbing material is bent between the upper surface of the vertical partition material and the top surface portion, and is between the front surface portion and the vertical partition material, and the upper surface portion of the vertical partition material and the top surface portion. The sound absorbing panel according to claim 1, wherein the sound absorbing panel is located between the space and between the back surface portion and the vertical partition member. The sound absorbing panel according to claim 6, wherein at least a surface of the single sound absorbing material facing the top surface thereof is covered with a water-repellent member having breathability. The sound absorbing panel according to claim 6 or 7, wherein the single sound absorbing material is in contact with the top surface portion. The exterior material has a bottom surface portion that faces the top surface portion in the vertical direction.
The vertical partition member is provided in the exterior material in contact with the bottom surface portion, and is provided halfway between the top surface portion and the bottom surface portion.
The sound absorbing material is
Has a third sound absorbing material,
3. The third sound absorbing material is characterized in that it is located between the upper surface of the first sound absorbing material, the upper surface of the vertical partitioning material, and the upper surface of the second sound absorbing material and the top surface portion. The sound absorbing panel described in. The exterior material has a horizontal partition material provided in the plane direction.
The sound absorbing panel according to claim 9, wherein the horizontal partition member is located at least between the upper surface of the first sound absorbing material and the lower surface of the third sound absorbing material. The upper part of the sound absorbing panel is provided with an overhanging portion protruding from the lower part to the back side.
The sound absorbing panel according to claim 9 or 10, wherein the third sound absorbing material is arranged in the overhanging portion. The sound absorbing panel according to any one of claims 9 to 11, wherein the third sound absorbing material has a higher density than each of the first sound absorbing material and the second sound absorbing material. The sound absorbing panel according to any one of claims 9 to 12, wherein at least a surface of the third sound absorbing material facing the top surface thereof is covered with a water-repellent member having breathability. The sound absorbing panel according to any one of claims 9 to 13, wherein the third sound absorbing material is in contact with the top surface portion. The sound absorbing panel according to any one of claims 1 to 14, wherein the first opening has a louver shape.

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