JP2006299698A - Soundproof panel and soundproof wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soundproof panel which is in harmony with the circumferential environment, and excellent in acoustic properties. <P>SOLUTION: The soundproof panel is formed of a porous front plate 2 which is perforated such that pores are visible from the front, a colored layer 3 which generally allows sound waves to pass therethrough and has a color applied thereto, a sound absorbing layer 4 formed of an acoustic materia, an air layer 5, and a rear plate 6, which are arranged in this order in a panel thickness direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a soundproof wall that is mainly installed along a roadside zone and a central separation zone of a roadway, and a soundproof panel that constitutes the soundproof wall, for example, in order to prevent noise pollution caused by traveling on a highway or a general road. It is about. Moreover, these soundproof panels and soundproof walls can be applied to any place for the purpose of preventing noise in addition to being installed on both sides of the track for the purpose of preventing railway noise.

  Conventionally, a panel 11 as shown in FIGS. 8 and 9 is generally used as this type of soundproof panel. The soundproof panel 11 has a sound absorbing material 14 made of glass wool disposed inside a louver type front plate 12 made of an aluminum plate having a thickness of 1 mm, and an air layer 15 is provided between the sound absorbing material 14 and the back plate 16. The louver type front plate 12 is directed to the noise generation side (road side), and the noise incident from the opening of the louver 12a is absorbed and attenuated by the sound absorbing material 14, thereby reducing noise generated from road traffic and the like. Like to do.

Moreover, there exists a thing described in patent document 1 as a conventional noise barrier. In Patent Document 1, as shown in FIG. 10, a design is applied to a porous plate 18 of a box body 17, and holes 19 having the same arrangement as the holes 18 a of the porous plate 18 are provided on the inner surface side of the porous plate 18. In addition, a street soundproof wall 21 is disclosed in which a hole 18a of a perforated plate 18 is selectively closed, and a colored plate 19 is appropriately designed in the closed portion. In FIG. 10, reference numeral 20 denotes a sound-absorbing material made of glass wool filled inside the box body 17, and 13 denotes a support column protruding outward from the box body 17.
Japanese Utility Model Publication No. 7-25013

  In the general soundproof panel shown in FIGS. 8 and 9, since the front plate 12 is formed of aluminum metal, the appearance has a strong metal feeling, and the landscape is uncomfortable with the surrounding environment. Further, there is a problem that even if the front plate 12 is colored and painted, it becomes a smooth colored surface and gives an inorganic impression, so that it is difficult to harmonize with the surrounding environment. Further, since this general soundproof panel has a shielding action by the louver 12a of the front plate 12, the propagation direction of the sound wave incident on the inside of the panel is limited, the incident rate of noise is lowered, and a sufficient sound absorption effect is obtained. There was also a problem that it was difficult to be done.

  In addition, the soundproof wall for streets described in Patent Document 1 is provided with a color design to the soundproof wall by disposing a color plate 19 with a design on the inner surface side of the porous plate 18. No. 19 reflects the sound wave without transmitting it, so that the sound absorption is deteriorated, and even if the perforated plate 18 and the color plate 19 are combined, the inorganic texture is eliminated as a smooth colored surface by the plate material. There was a problem that it was difficult to get used to the surrounding environment.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a soundproof panel and a soundproof wall that are well harmonized with the surrounding environment and excellent in sound absorption performance.

  Means for solving the above problems will be described with reference numerals in the embodiments described later. In the soundproof panel according to the first aspect, the holes 2a can be seen from the front side sequentially in the panel thickness direction. It is characterized by comprising a perforated front plate 2 with holes, a colored layer 3 through which sound waves can generally pass and colored, a sound absorbing layer 4 made of a sound absorbing material, an air layer 5 and a back plate 6. To do.

  By exposing the material color of the colored layer 3 from the hole 2a of the front plate 2, a warm landscape can be created, and by selecting the color of the colored layer 3, it can be harmonized with the surrounding landscape. Furthermore, since the colored layer 3 can transmit sound waves substantially and noise reaches the sound absorbing layer 4 without being reflected by the colored layer 3, high sound absorbing performance can be exhibited. In addition, about the material of the colored layer 3, what is necessary is just the material which can be colored and can permeate | transmit sound waves, such as a fiber type | system | group and a film type | system | group other than a glass cloth. In addition, by adopting the porous front plate 2 that is perforated so that the hole 2a can be seen from the front side on the noise generating side, the propagation direction of the sound wave incident on the inside of the panel is not restricted, and the sound wave can be absorbed and attenuated efficiently. . For this reason, compared with the conventional general soundproof panel which uses the louver-shaped front board, the outstanding noise absorption effect is exhibited. The material of the sound absorbing layer 4 may be any material that can absorb and attenuate sound waves such as glass wool fiber and polyester fiber.

  According to a second aspect of the present invention, in the soundproof panel according to the first aspect, the air layer 5 is provided with a pressing member 7 for pressing the back side of the sound absorbing layer 4 at least at the upper part and the lower part of the panel. .

  When a gap is generated between the front plate 2 and the colored layer 3, a shadow is generated in the gap, and when the panel is viewed from the front, the color of the colored layer 3 cannot be expressed well by a trial test by the inventor. became. In the conventional general soundproof panel, as can be seen from FIG. 9, the sound absorbing layer 14 is supported only by the middle portion in the vertical direction of the panel, so that the upper and lower end sides of the sound absorbing layer 4 fall to the air layer 5 side. A gap is formed between the colored layer 3 in contact with the layer 4 and the front plate 2. In the present invention, since the pressing member 7 for pressing the back side of the sound absorbing layer 4 is provided at least at the upper part and the lower part of the panel, no gap is generated between the colored layer 3 and the front plate 2. The number and location of the pressing members 7 are not limited as long as the pressing members 7 are provided at least at two locations, ie, at the upper portion and the lower portion of the panel, such as at three locations of the upper portion, the lower portion, and the middle portion of the panel. Further, the material of the pressing member 7 may be any material as long as the back side of the sound absorbing layer 4 can be pressed.

  According to a third aspect of the present invention, in the soundproof panel according to the second aspect, the pressing member 7 is made of a plate material processed into a bent plate shape, and an attachment portion piece 7a attached to the back plate 6 and the attachment portion piece 7a. A support portion piece 7b having a required angle and supporting a required portion on the back side of the sound absorbing layer 4 is formed.

  If the pressing member 7 is a plate material, it can be easily processed into a predetermined dimension and is superior in cost. Therefore, the material is limited to the plate material. The plate material may be a plate shape such as a steel plate or an aluminum plate. The method of processing this plate material into a bent plate shape may be processed by extrusion molding as well as press bending, and the method is not limited.

  According to a fourth aspect of the present invention, in the soundproof panel according to any one of the first to third aspects, the holes 2a formed in the front plate 2 are arranged in a staggered manner so that the hole opening ratio per unit area is 60% or more. It is characterized by that.

  As a result of the inventor's prototype test, by making the hole opening ratio 60% or more, the color due to the colored layer 3 exposed from the hole 2a is well expressed, and the metallic feeling of the front plate 2 can be eliminated. It was. Further, since the aperture ratio is large, the sound absorption performance is also high, and the oblique incident sound absorption coefficient measurement of the soundproof panel shows a high value of about 90%, which is an improvement of about 20% compared to about 75% of the conventional panel. In this case, the arrangement of the holes 2a is the staggered arrangement because the staggered arrangement is suitable for increasing the aperture ratio. The shape of the hole 2a is generally a circle, but is not limited to a circle, and may be any shape.

  According to a fifth aspect of the present invention, in the soundproof panel according to the fourth aspect, the front plate 2 is made of an aluminum plate having a thickness t of 1.2 mm or more.

  As a material for the front plate 2, an aluminum plate having a thickness of 1 mm has been generally used. This is because the material is softer than that of the steel plate and punching hole processing is easy, and since the material does not rust, the anticorrosion treatment of the punching hole edge is unnecessary. However, when the hole opening ratio is set to 60% or more as described in claim 4, the front plate 2 is likely to be distorted during drilling, which is not preferable in appearance. As a result of the inventor's prototype test, if the plate thickness was 1.2 mm or more, distortion was generally suppressed, so the plate thickness of the aluminum plate was 1.2 mm or more. In practical use, about 1.5 mm is desirable.

  A soundproof panel according to claim 5 is the soundproof panel according to claim 5, wherein a stepped portion 8 is formed in the upper end portion of the front plate 2 so as to be depressed from the front plate front side, and the soundproof panel 1 is provided at the lower end portion of the front plate 2. A projecting piece 9 is formed so as to fit in the stepped portion 8 at the upper end of the front plate 2 of the lower soundproof panel 1 when stacked in the vertical direction. The front end portion 6ao of the front extension portion 6a extended to the front end portion 8o of the front plate 2 forming the step portion 8 is rivet-joined, and the step d of the step portion 8 from the front plate 2 surface is set to 10 It is characterized by being ± 1 mm.

  A stepped portion 8 that sinks from the front plate front side is formed at the upper end of the front plate 2, and the stepped portion of the lower front plate 2 is stacked at the lower end of the front plate 2 in the vertical direction. A structure in which a protruding piece 9 is formed so as to be engaged with 8 and fit in the stepped portion 8 has been known. Further, as shown in FIG. 9, the conventional soundproof panel has a structure in which the upper end portion side of the front plate 12 is extended to the back of the back plate 16 by bending. However, when the thickness t of the front plate 2 is 1.2 mm as described in claim 5, the bending rigidity is larger than the plate thickness 1 mm of the conventional front plate 12, which is similar to the conventional soundproof panel 11. In addition, it has been clarified by the inventor's prototype test that the plate bending process of extending the upper end portion of the front plate 12 to the back of the back plate 16 is difficult in production. Therefore, the front plate 2 is made up to the step portion 8 formed at the upper end portion of the front plate 2, and the front plate 2 and the back plate 6 are rivet-joined at the step portion 8.

  In this case, since the rivet head protrudes at the stepped portion 8, the stepped portion from the surface of the front plate 12 of the stepped portion of the conventional soundproof panel 11 shown in FIG. 9 is 6.5 mm. The level difference d from the front plate 2 surface of 8 was set to 10 ± 1 mm. As a result of the construction confirmation test by the inventor, it has been found that such a stepped portion 8 has no hindrance to the overlapping of the upper and lower panels at the time of construction, and that the stepped portion 8 does not rattle. The matters described in claim 5 are limited based on the findings described above.

  A seventh aspect of the present invention provides the soundproof panel according to any one of the first to sixth aspects, wherein the panel reinforcing member 10 having an L-shaped cross section composed of the front side member 10a and the side side member 10b and extending in the vertical direction is provided in the panel longitudinal direction. In arranging the back side of the front plate 2 at the intermediate required position, the side member 10b of the panel reinforcing member 10 is sandwiched between the divided layer portions 4a and 4a obtained by dividing the sound absorbing layer 4 in the longitudinal direction, and the front side member 10a is one side. It is made to contact | abut to the edge part front side of the division | segmentation layer part 4a, and to be covered with the colored layer 3. It is characterized by the above-mentioned.

  In a soundproof panel that has been generally used in the past, when the panels are stacked in the vertical direction, the lower panel may be deformed by the weight of the panel. In order to prevent this, a panel reinforcing plate is arranged on the back side of the front plate at the middle portion in the longitudinal direction of the panel. In the conventional soundproof panel as shown in FIG. 9, since the louver-shaped hole is opened in the front plate, the reinforcing plate can be seen from the front of the panel because the panel reinforcing plate is arranged in the place where the hole is not opened. Absent. However, the soundproof panel 1 according to the present invention employs the front plate 2 in which the hole 2a can be seen from the front of the panel. In the conventional mounting method, the panel reinforcing member 10 is exposed from the hole 2a, which is unsatisfactory in view. . Therefore, the soundproof panel 1 of the present invention is made to be excellent in landscape by covering the panel reinforcing member 10 with the colored layer 3.

  The soundproof wall according to claim 8 is formed by installing a plurality of support columns 22 at required intervals and attaching the soundproof panel 1 according to any one of claims 1 to 7 between the support columns 22. It is characterized by.

  Usually, a soundproof wall installed on a road or the like has a wall structure obtained by building a plurality of support columns, dropping a panel into the column, and fixing with a fixing bracket. In the eighth aspect of the present invention, the soundproof panel 1 according to any one of the first to seventh aspects is attached between the columns 22 built at a required interval to form a soundproof wall.

  The effect of the invention by the above solution will be described with reference numerals of embodiments described later. According to the invention according to claim 1, the material color of the colored layer 3 is exposed from the hole 2a of the front plate 2. By creating a warm landscape, the color of the colored layer 3 can be selected to harmonize with the surrounding landscape. Moreover, since the colored layer 3 can almost transmit sound waves and noise reaches the sound absorbing layer 4 without being reflected by the colored layer 3, high sound absorbing performance can be exhibited.

  According to the invention which concerns on Claim 2, the clearance gap arises between the front board 2 and the colored layer 3 by providing the pressing member 7 which hold | suppresses the back side of the sound absorption layer 4 in the upper part and lower part of a panel at least. The shadow which arises between the front board 2 and the colored layer 3 can be eliminated, and the soundproof panel 1 excellent in the landscape can be provided.

  According to the invention of claim 3, the pressing member 7 is made of a plate material processed into a bent plate shape, and is formed with the attachment portion piece 7a and the support portion piece 7b. It is superior and easy to install.

  According to the invention which concerns on Claim 4, while making the hole opening ratio of the front board 2 become 60% or more, while being able to eliminate the metal feeling of the front board 2, noise has a high hole opening ratio. Since the front plate 2 passes through the colored layer 3 having high sound permeability and reaches the sound absorbing layer 4 efficiently, high sound absorbing performance can be ensured.

  According to the invention according to claim 5, by making the front plate 2 an aluminum plate, the hole processing is easy and the material is not rusted, so that the anticorrosion treatment of the hole edge is unnecessary, and the hole opening ratio is 60%. In the case described above, the aluminum plate can be prevented from being distorted by setting the thickness of the aluminum plate to 1.2 mm or more.

  According to the invention which concerns on Claim 6, in forming the level | step-difference part 8, the front-end | tip part 6ao of the front extension part 6a extended ahead from the upper end of the backplate 6, and the front board 2 which forms the level | step difference part 8 By riveting the tip 8o and further setting the step d of the step 8 from the surface of the front plate 2 to 10 ± 1 mm, the manufacturability is improved and the panel can be smoothly meshed and the workability is also improved. This improves the backlash between the panels.

  According to the seventh aspect of the present invention, the front side of the panel reinforcing member 10 is covered with the colored layer 3 so that the scenery is excellent.

  According to the invention which concerns on Claim 8, it has high sound absorption property by attaching the soundproof panel 1 in any one of Claims 1-7 between the support | pillars 22 installed in the required space | interval, and is scenic A soundproof wall can be obtained even though it is excellent.

  A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 (a) is a front view showing an embodiment of a soundproof panel 1 according to the present invention, and (b) is a schematic left side view of the panel 1. FIG. FIG. 2 is an enlarged sectional view taken along line XX of FIG. 3 is a partially enlarged view of FIG. 1 (a), FIG. 4 is a cross-sectional view similar to FIG. 2 showing a soundproof panel 1 of another embodiment, and FIG. 5 is an enlarged cross-sectional view of the soundproof panel 1. . As can be seen from FIG. 1 (a) and FIG. 2, this soundproof panel 1 is a porous front plate 2 that is perforated so that the holes 2a can be seen from the front side sequentially in the thickness direction of the panel. It is configured to include a colored layer 3 which can pass through, a colored layer, a sound absorbing layer 4 made of a sound absorbing material, an air layer 5 and a back plate 6.

  The front plate 2 is made of an aluminum plate having a thickness t of 1.2 mm (see FIG. 5), preferably 1.5 mm. The front plate 2 has a diameter φ of 18 mm as shown in FIG. Circular holes 2a are opened laterally and obliquely at a pitch p of 22 mm, and the hole opening ratio per unit area is 61%. As can be seen from FIG. 5, the front plate 2 forms a stepped portion 8 at the upper end portion, and thus extends forward from the front end portion 8 o of the front plate 2 forming the stepped portion 8 and the upper end of the rear plate 6. Further, the front end portion 6ao of the front extending portion 6a is rivet-joined. Further, a projecting piece 9 is formed at the lower end portion of the front plate 2 so as to engage with the stepped portion 8 of the lower front plate 2 and fit into the stepped portion 8 when the front plate 2 is stacked in the vertical direction. The front end piece 9o of the projecting piece 9 is integrated with the front end 6bo in a state where the front end 6bo of the front extension 6b extending forward from the lower end of the back plate 6 is wrapped and sandwiched. It is joined to.

  The colored layer 3 is made of a colored glass cloth. By exposing the color of the glass cloth from the hole 2a of the front plate 2, the metal feeling of the front plate 2 is eliminated and the landscape is excellent. can do. At this time, as shown in FIG. 2, by pressing the upper and lower portions of the sound absorbing layer 4 with the pressing member 7, there is no gap generated between the front plate 2 and the colored layer 3, and thus the colored layer 3 is removed. It is possible to eliminate the inconvenience that a shadow is generated and the appearance is deteriorated. The pressing member 7 includes an attachment part piece 7a attached to the back plate 6 and a support part piece 7b having a required angle with respect to the attachment part piece 7a and supporting the required part on the back side of the sound absorbing layer 4. Is.

  The sound absorbing layer 4 is made of a sound absorbing material made of glass wool fiber, and the back plate 6 and the pressing member 7 are made of plate-plated steel plates.

  In this embodiment, the hole 2a opened in the front plate 2 is a circular round hole, but the shape thereof is not limited to a square hole or the like. Moreover, 60% or more of the hole opening rate of the front board 2 is desirable from a landscape property and a sound absorption property. And the colored layer 3 should just be what can permeate | transmit sound waves substantially and can color, The material is not limited. The sound absorbing layer 4 may be any material that can absorb and attenuate noise, and polyester fiber, acrylic fiber, and the like can be considered other than glass wool fibers.

  In this soundproof panel 1, as shown in FIG. 2, two portions on the back side of the sound absorbing layer 4 on the back side of the sound absorbing layer 4 are formed by the pressing member 7 so that no gap is generated between the colored layer 3 and the front plate 2. However, as in the soundproof panel 1 shown in FIG. 4, the entire back side of the sound absorbing layer 4 can be held uniformly by pressing the upper, lower and intermediate portions of the sound absorbing layer 4. Thus, it is possible to prevent the gap between the colored layer 3 and the front plate 2 more reliably. In addition, each pressing member 7 may be one in which a plurality of short pieces are arranged at every required interval in the longitudinal direction of the soundproof panel 1 or formed continuously over the entire length in the longitudinal direction of the soundproof panel 1. A single long one may be used.

  FIG. 6 is a partial cross-sectional plan view of the soundproof panel 1. As can be seen from this figure, the panel reinforcing member 10 extending in the vertical direction having an L-shaped cross section composed of a front side member 10a and a side surface member 10b is shown in FIG. By disposing the soundproof panel 1 in the vertical direction, the panel 1 is prevented from being deformed by being arranged on the back side of the front plate 2 at the middle position in the longitudinal direction of the panel.

  If such a panel reinforcing member 10 is disposed in contact with the back side of the front plate 2 as it is, the panel reinforcing member 10 is exposed from the hole 2a of the front plate 2, which is not preferable in view. For this reason, a colored glass cloth is used as the colored layer 3, glass wool is used as the sound absorbing layer 4, and the glass wool as the sound absorbing layer 4 is further divided into two in the panel length direction. The glass cloth 3 (colored layer) is adhered and wound around the front side and the left and right side surfaces with an adhesive.

  When the divided layer portions 4a and 4a of the sound absorbing layer 4 in a state where the glass cloth 3 is wound in this way are housed in the panel, a part 3o of the glass cloth 3 wound around the end side of the one divided layer portion 4a is peeled off. After the L-shaped panel reinforcing member 10 is applied to the peeled portion, the peeled glass cloth portion 3o is covered with the panel reinforcing member 10 to cover the front side member 10a and the side member 10b. To do. Thus, the side-side member 10b of the panel reinforcing member 10 is accommodated in the two divided layer portions 4a by accommodating the one divided layer portion 4a and the end portions of the other divided layer portion 4a in the panel. , 4a, and the glass cloth portion 3ob covering the side member 10b of the panel reinforcing member 10 in one divided layer portion 4a is sandwiched between the other divided layer portion 4a. Since the front plate 2 is covered with the glass cloth portion 3oa that is pressed by the side surface portion of the other divided layer portion 4a and covers the front side member 10a of the panel reinforcing member 10, the peeled glass cloth portion 3o Will not go up.

  As a result, the panel reinforcing member 10 can be colored without adding a new member. Glass cloth-wound glass wool has been commercialized. By processing the glass cloth so that it is easy to peel off the glass cloth, there is no problem in production and it can be handled at low cost.

  In this embodiment, the sound absorbing layer 4 (glass wool) is divided into two in the longitudinal direction of the panel. However, the sound absorbing layer 4 is not limited to the two divisions, and can be divided into three or more divisions. What is necessary is just to insert the side member 10b of the panel reinforcement member 10 between the layer parts 4a and 4a.

  FIG. 7A shows an example of a soundproof wall constructed using the soundproof panel 1 configured as described above. Although detailed illustration of this soundproof wall is omitted, pillars 22 made of H-shaped steel are erected on the concrete side wall 23 of the road at a required interval, and the soundproof panel 1 is placed between the adjacent pillars 22 and 22 in the front plate. 2 in the direction facing the road side (noise generation side), as shown in (b) of the figure, and stacking the soundproof panels 1 in a plurality of stages in the vertical direction while fixing the soundproof panels 1 to the columns 22 with fixing brackets (not shown) By attaching in a shape, a continuous wall structure is formed, and it has a high sound absorbing property and becomes a soundproof wall excellent in landscape.

(a) is a front view of the soundproof panel according to the present invention, and (b) is a schematic left side view of the panel. It is the XX line expanded sectional view of (a) of FIG. FIG. 2 is a partially enlarged view of FIG. It is sectional drawing similar to FIG. 2 which shows other embodiment of this invention. It is an expanded sectional view of a soundproof panel. It is a partial cross section top view of a soundproof panel. (a) is a schematic front view of a soundproof wall constructed using a soundproof panel, and (b) is a partially enlarged plan view of the soundproof wall. A front view of a conventional soundproof panel, (b) is a schematic left side view of the panel. It is the YY line expanded sectional view of (a) of FIG. It is a longitudinal cross-sectional view of another conventional soundproof panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soundproof panel 2 Front plate 2a Hole 3 Colored layer 4 Sound absorption layer 4a Division | segmentation layer part 5 Air layer 6 Back board 7 Pressing member 7a Mounting part piece 7b Supporting piece piece 8 Step part 9 Protruding piece part 10 Panel reinforcement member 10a Front side member 10b Side member

Claims (8)

  A porous front plate that is perforated so that the holes can be seen from the front side in the thickness direction of the panel, a colored layer that allows sound waves to pass through in general, a colored layer, a sound absorbing layer made of a sound absorbing material, an air layer, and a back A soundproof panel with a face plate.   The soundproof panel according to claim 1, wherein the air layer is provided with a pressing member for pressing the back side of the sound absorbing layer at least at an upper part and a lower part of the panel.   The holding member is made of a plate material processed into a bent plate shape, and has a mounting portion piece attached to the back plate and a support portion that has a required angle with respect to the mounting portion piece and supports the back side required portion of the sound absorbing layer. The soundproof panel according to claim 2, which is formed as a piece.   The soundproof panel according to any one of claims 1 to 3, wherein holes formed in the front plate are arranged in a staggered manner so that a hole opening ratio per unit area is 60% or more.   The soundproof panel according to claim 4, wherein the front plate is made of an aluminum plate having a thickness of 1.2 mm or more.   A stepped part that sinks from the front plate front side is formed at the upper end of the front plate, and the lower end of the front plate has a step at the upper end of the front plate of the lower soundproof panel when the soundproof panels are stacked in the vertical direction. In the formation of the stepped portion, the tip of the front extending portion that extends forward from the upper end of the back plate, and the tip of the front plate that forms the stepped portion are formed. The soundproof panel according to claim 5, wherein the step is 10 ± 1 mm from the front plate surface of the step portion.   When a panel reinforcing member having an L-shaped cross section composed of a front side member and a side side member and extending in the vertical direction is disposed on the back side of the front plate at an intermediate required position in the panel longitudinal direction, the side reinforcing member of this panel reinforcing member The layer is sandwiched between divided layer portions divided in the longitudinal direction, and the front side member is brought into contact with the front side of the end portion of one of the divided layer portions so as to be covered with the colored layer. Soundproof panel as described in A soundproof wall formed by installing a plurality of support columns at required intervals and attaching the soundproof panel according to any one of claims 1 to 7 between the support columns.

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