JP2021161610A - Top structure of soundproof wall and soundproof wall - Google Patents

Abstract

To provide a top structure of a soundproof wall which has good maintainability, is excellent in noise reduction efficiency without increasing the height, and is unlikely to cross over a boundary of adjacent site, and the soundproof wall.SOLUTION: A top structure 5 of a soundproof wall 1 for reducing noise from a noise source, comprises: a sound insulation panel 50 which is attached between support pillars 2, 2 and extends in the vertical direction; and a branch panel 51 which extends obliquely upward to the noise source-side from the sound insulation panel 50, wherein a rebranch panel 52 which extends obliquely downward from the branch panel 51 is further provided.SELECTED DRAWING: Figure 6

Description

The present invention relates to a top structure of a soundproof wall that reduces noise from a noise source.

It is installed along roads such as highways and along tracks, and noise barriers are installed to prevent the propagation of noise from noise sources. Such a soundproof wall is required to be able to reduce noise without increasing the height. Therefore, in recent years, it has been proposed to improve the top structure of the soundproof wall to reduce the noise by interfering the direct sound from the noise source with the diffracted sound or the reflected sound.

For example, in Patent Document 1, a first branch wall 2 inclined toward the sound source side is provided at the upper end of the main body wall 1, and a second branch wall 3 inclined toward the sound source side is provided. A so-called Y-shaped soundproof wall is disclosed in which at least one branch wall 2 of the first and second branch walls is provided with a re-branch wall 4 that re-branches in a direction different from that of the branch wall 2 (Patent Document 1). 1. Claim 1, paragraphs [0012], [0013] of the specification, FIGS. 1 to 3 of the drawings, etc.).

Further, in Patent Document 2, the first sound absorbing unit 2 is provided on the upper part of the main body wall 1 which rises substantially vertically, and the sound absorbing unit 2 extends from the side surface of the main body wall 1 on the anti-sound source side to the anti-sound source side and has a tip. A so-called Y-shaped soundproof wall in which a second sound absorbing unit 3 is provided above the overhanging portions 4 and 5 extending upward on the side is disclosed (Claims 1 of Patent Document 2). (See paragraphs [0011] and [0012] of the above, FIG. 1 of the drawing, etc.).

However, in the Y-shaped soundproof wall described in Patent Document 1 and Patent Document 2, the branch wall of the soundproof wall projects on the back side opposite to the noise source. Since crossing the border is not allowed on the private land side outside the site of roads and railroad tracks, the Y-shaped noise barrier described in Patent Document 1 and Patent Document 2 is installed on the site side of the normal soundproof wall. There was a problem that it was necessary and the space could not be used effectively.

Further, although the Y-shaped soundproof wall described in Patent Document 1 and Patent Document 2 has a sound reduction effect due to the damping effect due to multiple diffraction, it has a plurality of Y-shaped branches that are open at the top, so that precipitation occurs there. There was a problem that flying objects such as fallen leaves and sand were accumulated and had to be cleaned and removed regularly. That is, the Y-shaped soundproof wall described in Patent Document 1 and Patent Document 2 requires frequent maintenance work such as cleaning, and has a problem of poor maintainability.

Further, in Patent Document 3, a back plate 9 attached between the columns 3 proposed by the applicant, a horizontal plate 10 joined to the upper end of the back plate 9 and extending substantially horizontally toward the noise source side, and a back plate are described. 9 The upper part is composed of an inclined plate 12 extending diagonally upward toward the noise source side joined via a joint plate 11, and a noise introducing portion 13 is formed between the tip of the horizontal plate 10 and the upper end of the inclined plate 12. A top diffractive sound insulation wall is disclosed (see claims 1, claims of Patent Document 3, paragraphs [0021] to [0031] of the specification, FIGS. 2, 3 and the like in the drawings).

The top diffraction type sound insulation wall described in Patent Document 3 has an advantage that it is a so-called deformed Y type and has no portion protruding outward (back side) and does not invade the boundary of the adjacent land. Further, the top diffractive sound insulation wall described in Patent Document 3 has one deformed Y-shaped branch protruding diagonally upward with the upper side open, and it cannot be said that the maintainability is so bad. However, as a sound insulation wall, it is required to further improve maintainability and improve the noise reduction effect without increasing the height.

Japanese Unexamined Patent Publication No. 8-85921 Japanese Unexamined Patent Publication No. 10-292322 Japanese Unexamined Patent Publication No. 2005-213573

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object of the present invention is that it is easy to maintain, has excellent noise reduction efficiency without raising the height, and may cross the border of the adjacent land. It is to provide a top structure and a soundproof wall without a soundproof wall.

The top structure of the soundproof wall according to the first invention is a top structure of the soundproof wall that reduces noise from a noise source, and includes a sound insulation panel that is attached between columns and extends in the vertical direction, and a noise source from the sound insulation panel. A branch panel extending diagonally upward on the side is provided, and a removable sound absorbing member is attached to the lower surface side of the branch panel.

The top structure of the soundproof wall according to the second invention is a top structure of the soundproof wall that reduces noise from a noise source, and includes a sound insulation panel that is attached between columns and extends in the vertical direction, and a noise source from the sound insulation panel. A branch panel extending diagonally upward on the side is provided, and a re-branch panel extending diagonally downward from the branch panel is further provided.

The top structure of the soundproof wall according to the third invention is characterized in that, in the second invention, sound absorbing members are attached to both the lower surface of the branch panel and the re-branch panel.

The top structure of the soundproof wall according to the fourth invention is provided with a drainage mechanism for draining the precipitation accumulated between the branch panel and the sound insulation panel in any one of the first to third inventions. It is characterized by.

The top structure of the soundproof wall according to the fifth invention is characterized in that, in the fourth invention, the drainage mechanism is a drainage hole formed in the branch panel.

The top structure of the soundproof wall according to the sixth invention is characterized in that, in the fourth invention, the drainage mechanism is a drainage slit provided in a side panel that closes a side surface between the branch panel and the sound insulation panel. do.

The top structure of the soundproof wall according to the seventh invention is characterized in that, in any one of the first to sixth inventions, a sound absorbing member is provided on the upper side of the sound insulating panel on the opposite side of the noise source.

In the top structure of the soundproof wall according to the eighth invention, in any one of the first to seventh inventions, a horizontal plate extending in the horizontal direction is provided on the upper part of the sound insulation panel, and a horizontal plate extending in the horizontal direction is provided at the tip of the horizontal plate. Is characterized in that a folded piece that is folded downward is formed.

The sound insulation wall according to the ninth invention is a sound insulation wall that prevents the propagation of noise from a noise source, and is characterized by having the top structure of the sound insulation wall according to any one of claims 1 to 8.

According to the first invention, there are few Y-shaped portions opened upward, there is little risk of flying objects accumulating, and frequent cleaning or the like is not required, so that maintainability is good. That is, the place where the flying object may collect is one place with a large opening, the number of inspection places is small, and the cleaning is easy, so that the maintainability is good.
Further, according to the first invention, since the sound absorbing member is attached, the acoustic power at the tip of the soundproof wall can be reduced, and the noise can be further reduced. Further, since the sound absorbing member is attached to the lower surface side of the branch panel, flying objects and dust are less likely to collect and are not clogged. In addition, since the sound absorbing member is attached to the lower surface side of the branch panel, not only does the sound absorbing material not be exposed to direct sunlight, but also the sound absorbing material is less likely to deteriorate due to good drainage, and the durability is improved. Further, since the sound absorbing member is detachably configured, the sound absorbing member can be removed during the repair work, and the maintainability is further improved.
In addition, according to the first invention, since there is no protruding portion on the opposite side of the noise source, the soundproof wall can be installed as close as possible to the entire boundary without crossing the boundary of the adjacent land, and the space is effectively used. can do.

According to the second to ninth inventions, there are few Y-shaped portions opened upward, there is little risk of flying objects accumulating, and frequent cleaning or the like is not required, so that maintainability is good. That is, the place where the flying object may collect is one place with a large opening, the number of inspection places is small, and the cleaning is easy, so that the maintainability is good.
Further, according to the second to ninth inventions, since there are more branch points than the conventional modified Y-shaped soundproof wall, the noise reduction efficiency is further improved without increasing the height due to the attenuation effect by multiple diffraction.
Moreover, according to the second to ninth inventions, since there is no protruding portion on the opposite side to the noise source, the soundproof wall can be installed as close as possible to the entire boundary without crossing the boundary of the adjacent land, which is a space. Can be used effectively.

In particular, according to the third invention, since the sound absorbing member provided on the lower surface of the branch panel can absorb the direct sound of the noise from the noise source without lowering the maintainability, the noise reduction efficiency is further improved. ..

In particular, according to the fourth to sixth inventions, since the drainage mechanism is provided between the branch panel and the sound insulation panel, it is possible to prevent precipitation such as rain or snow from accumulating at the branch portion of the panel. can.

In particular, according to the seventh invention, since the sound absorbing member is provided on the opposite side of the upper part of the sound insulating panel from the noise source, the noise that wraps around the upper part of the sound insulating panel and propagates to the vicinity is effectively absorbed. Noise can be reduced.

In particular, according to the eighth invention, the frequency band that interferes with the horizontal plate and the folded piece can be adjusted, and noise can be reduced according to the characteristics of the sound source.

In particular, according to the ninth invention, the above-mentioned action and effect can be exhibited as a soundproof wall.

FIG. 1 is a front view showing a soundproof wall according to a first embodiment of the present invention as viewed from the noise source side. FIG. 2 is a vertical cross-sectional view showing a schematic configuration of the same soundproof wall. FIG. 3 is a vertical cross-sectional view showing the sound absorbing panel of the soundproof wall of the same. FIG. 4 is an enlarged vertical cross-sectional view showing a method of fixing the sound absorbing panel to the support column. FIG. 5 is an enlarged view of part A of FIG. 2 showing the top structure of the soundproof wall of the same. FIG. 6 is a perspective view showing the drainage mechanism of the top structure of the same. FIG. 7 is a perspective view showing a drainage mechanism according to a modified example of the top structure of the above. FIG. 8 is a partially enlarged view similar to FIG. 5 showing the top structure of the soundproof wall according to the second embodiment of the present invention. FIG. 9 is a perspective view showing the top structure of the soundproof wall as above.

Hereinafter, the soundproof wall and its top structure according to the embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
First, the soundproof wall 1 and the top structure 5 of the soundproof wall 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7.

FIG. 1 is a front view showing the soundproof wall 1 according to the first embodiment of the present invention as viewed from the noise source side, and FIG. 2 is a vertical cross section showing a schematic configuration of the soundproof wall 1 according to the present embodiment. It is a figure. Further, FIG. 3 is a vertical cross-sectional view showing the sound absorbing panel 3 of the soundproof wall 1 according to the present embodiment.

The soundproof wall 1 according to the embodiment of the present invention is a soundproof wall arranged side by side along a noise source area such as a road, a railroad, an outdoor unit, a factory, or the like, and is a direct sound from the noise source. It is a soundproof wall with a top structure that reduces noise by interfering with diffracted and reflected sounds.

As shown in FIGS. 1 and 2, the soundproof wall 1 according to the present embodiment is made of a plurality of H-shaped steels erected at predetermined intervals (for example, 2 m or 4 m) on a structure such as a concrete structure. Supports 2 and 2, a plurality of stages of sound absorbing panels 3 inserted between the columns 2 and 2, and a top structure 5 to be described later provided on the uppermost stage of the soundproof wall 1 above the sound absorbing panels 3. It is composed of.

<Strut>
The support column 2 is made of H-shaped steel having a predetermined flange spacing (for example, about 100 mm to 175 mm) that has been subjected to a rust preventive treatment such as hot-dip galvanizing. Of course, in the support column according to the present invention, a square pipe, channel steel, or I-shaped steel can be inserted as long as the sound absorbing panel 3 described later can be inserted between them and can withstand the wind pressure assumed as a soundproof wall. It is also possible to substitute a support made of other steel materials or other materials.

<Sound absorption panel>
As shown in FIGS. 1 to 4, the sound absorbing panel 3 includes a metal housing 30 having a rectangular box shape (for example, height 500 mm × thickness 95 mm × length 1980 mm) made of a metal plate, and the front surface of the metal housing 30. This is a general sound absorbing panel in which a sound absorbing material 31 is inserted on the side (noise source side) and an air layer 32 is formed on the back side (opposite side away from the noise source).

Of course, the sound absorbing panel according to the present invention is not limited to the porous sound absorbing type in which the sound absorbing material described later is inserted. For example, the sound absorbing panel according to the present invention is a plate (film) vibration type sound absorbing type that vibrates a plate or a membrane and consumes a part of the sound energy by internal friction to absorb sound, and a resonator having a hole in the cavity. In addition, other known sound absorbing panels such as a resonator type sound absorbing panel in which the air in the hole portion vibrates violently near the resonance frequency and is consumed as frictional heat with the surroundings to absorb sound can be used.

(Metal housing)
The metal housing 30 is made of a metal plate such as a highly weather-resistant plated steel plate or an aluminum plate. Further, as shown in FIG. 1, the front plate of the metal housing 30 is an aluminum plate having a louver-type opening formed therein, and the direct sound of noise is produced from the louver-type opening. Is transmitted, and the direct sound is absorbed by the sound absorbing material 31. Of course, this metal housing is not limited to the louver type, and may be a punching metal type having a large number of through holes.

(Sound absorbing material)
The sound absorbing material 31 is made of a fiber material such as glass wool or polyester fiber or a porous material such as foamed resin, and has a function of diffusely reflecting and attenuating noise by the sound absorbing material 31 to reduce sound. Of course, the sound absorbing material according to the present invention is not particularly limited as long as it is a material having predetermined water repellency and flame retardancy that can diffusely reflect and attenuate noise to absorb sound and can be inserted into a soundproof wall. The sound absorbing material 31 can be replaced with other known sound absorbing materials such as a plate (membrane) vibration type sound absorbing type and a resonator type sound absorbing material, similarly to the sound absorbing panel 3 described above.

Next, a method of fixing the sound absorbing panel 3 to the support column 2 will be briefly described with reference to FIG. FIG. 4 is an enlarged vertical cross-sectional view showing a method of fixing the sound absorbing panel 3 to the support column 2. As shown in FIG. 4, the sound absorbing panel 3 according to the present embodiment is inserted between the columns 2 and 2 made of H-shaped steel, and the fixing bracket M1 made of a leaf spring made of steel is inserted into the flange of the column 2. It is pressed and fixed. However, the method of fixing the sound absorbing panel 3 is not limited to the method of pressing and fixing with the fixing metal fitting M1, and it goes without saying that the sound absorbing panel 3 may be fixed by bolting to the support column 2 with bolts or nuts.

As shown in FIG. 1 and the like, as the soundproof wall 1 according to the present embodiment, a sound absorbing panel 3 provided with a metal housing 30 having a louver (galley) type opening is mounted below the top structure 5. The soundproof wall was illustrated and explained. However, the soundproof wall according to the present invention includes a soundproof wall having a punching panel on the noise side, which can absorb noise instead of the sound absorption panel 3, or a plate (film) vibration type sound absorption type. Needless to say, other types of sound absorbing panels such as a resonator type sound absorbing panel may be installed, a sound insulating plate and a light transmitting plate may be installed, or a combination of these may be installed in combination.

<Top structure of soundproof wall>
Next, the top structure 5 of the soundproof wall 1 will be described in detail with reference to FIGS. 5 to 7.
FIG. 5 is an enlarged view of part A of FIG. 2 showing the top structure 5 of the soundproof wall 1. Further, FIG. 6 is a perspective view showing the drainage mechanism 6 of the top structure 5, and FIG. 7 is a perspective view showing the drainage mechanism 6 ′ according to a modified example of the drainage mechanism 6.

As shown in FIG. 5, the top structure 5 of the soundproof wall 1 according to the first embodiment of the present invention has a sound insulation panel 50 extending vertically in the vertical direction in a vertical cross section, and an oblique sound insulation panel 50 toward the noise source side. It is composed of a branch panel 51 extending upward, a re-branching panel 52 extending diagonally downward from the branch panel 51, and the like. The sound insulation panel 50, the branch panel 51, and the re-branch panel 52 are made of a metal plate or an aluminum plate that has been subjected to a rust preventive treatment such as a highly weather resistant plated steel plate.

As described above, since the top structure 5 has a structure in which the re-branch panel 52 further protrudes from the branch panel 51, there are more branch points than the conventional modified Y-shaped soundproof wall, so that the height is increased by the damping effect due to multiple diffraction. Noise reduction efficiency is further improved without raising.

Further, as shown in FIG. 5, sound absorbing members 53 are attached to the lower surface of the branch panel 51 and both sides of the re-branch panel 52. Similar to the sound absorbing material 31 described above, the sound absorbing member 53 is made of a fiber material such as glass wool or polyester fiber or a porous material such as foamed resin, and has a function of diffusely reflecting and attenuating noise by the sound absorbing material to reduce sound. Have. Although the case where the sound absorbing material is directly installed on the branch panel or the like is illustrated, the above-mentioned sound absorbing panel 3 in which the sound absorbing material is installed in the metal housing or another type of sound absorbing panel may be installed. The sound absorbing member 53 can also be another known sound absorbing type, such as a plate (membrane) vibration type sound absorbing type and a resonator type sound absorbing type, similarly to the sound absorbing panel 3 described above.

In this way, since the sound absorbing member 53 capable of absorbing the direct sound from the noise source is attached to the lower surface side of the branch panel 51, the vehicle is a source of reflected sound and noise from the installation on the road or railroad. Multiple reflected sound with the soundproof wall 1 can be effectively prevented. In particular, since the sound absorbing member 53 is provided on the lower surface side of the branch panel 51, the sound absorbing member 53 can effectively absorb the noise generated from the lower part of a vehicle such as a railroad vehicle, which has become a problem in recent years.

Further, in the top structure 5, a sound absorbing member 53 made of a fiber material or the like on which flying objects such as fallen leaves are easily caught is not attached to the upper surface of the Y-shaped branch whose upper part is open. Therefore, maintenance work at the time of inspection becomes easy.

Further, the sound absorbing member 53 is housed in a punching metal, a louver type metal housing, or the like (not shown), and is bolted, fitted, or engaged with the branch panel 51 and the rebranch panel 52 so as to be retrofitted. It is preferably fixed and detachable. This is because the removable sound absorbing member 53 can be easily removed and replaced at the site where the soundproof wall 1 is installed. Further, the sound absorbing member 53 can be removed from the branch panel 51 and the re-branch panel 52 at the time of cleaning, and the maintainability is extremely good.

Then, as shown in FIG. 5, the above-mentioned sound absorbing panel 3 is installed on the outside (opposite side of the noise source) of the sound insulating panel 50 which is the upper part of the top structure 5. However, unlike the sound absorbing panel 3 below the top structure 5, the sound absorbing panel 3 is attached so that the sound absorbing material 31 faces the outside. This is because the sound absorbing material 31 absorbs and reduces the noise that goes around beyond the top structure 5 and propagates to the neighboring area. Therefore, the noise reduction efficiency is further improved without raising the height of the soundproof wall 1.

(Drainage mechanism)
Further, a drainage mechanism 6 is provided on the top structure 5 of the soundproof wall 1. The drainage mechanism 6 has a function of draining the precipitation accumulated between the branch panel 51 and the sound insulation panel 50. In the top structure 5 according to the present embodiment, as shown in FIG. 6, the drainage mechanism 6 is a drainage slit 60 formed in the side panel 54 that closes the side surface between the branch panel 51 and the sound insulation panel 50. ..

Therefore, the water collected between the branch panel 51 and the sound insulation panel 50 is drained from the side of the support column 2 of the soundproof wall 1 through the drainage slit 60 which is the drainage mechanism 6, and the water collects in the top structure 5. No more, and maintainability is further improved.

As shown in FIG. 7, a plurality of drainage holes 61'provided in the inner corner between the branch panel 51 and the sound insulation panel 50 are provided, and horizontal drainage is provided directly below the drainage holes 61'and 61'. It is also possible to provide a drain 62'to provide a drainage mechanism 6'corresponding to a modified example of draining water from the side of a support column 2 of the soundproof wall 1.

According to the soundproof wall 1 and the top structure 5 of the soundproof wall 1 according to the first embodiment of the present invention described above, there are few Y-shaped portions opened upward where flying objects are likely to collect, and the sound absorbing member 53 is there. Is not installed. Therefore, according to the top structure 5, there is little possibility that flying objects will accumulate, and it is not necessary to perform frequent cleaning or the like, so that maintainability is good. That is, the place where the flying object may collect is one place with a large opening, the number of inspection places is small, and the cleaning is easy, so that the maintainability is good.

Further, according to the top structure 5, since the sound absorbing member 53 is attached, the acoustic power at the tip of the soundproof wall 1 can be reduced, and the noise can be further reduced. Further, since the sound absorbing member 53 is attached to the lower surface side of the branch panel 51, flying objects and dust are less likely to collect and are not clogged. Further, since the sound absorbing member 53 is attached to the lower surface side of the branch panel, not only the sound absorbing member 53 is not exposed to direct sunlight, but also the sound absorbing member 53 is less likely to deteriorate due to good drainage, and the durability is improved. .. Further, since the sound absorbing member 53 is detachably configured, the sound absorbing member 53 can be removed during the repair work, and the maintainability is further improved.

Further, according to the top structure 5, since the re-branch panel 52 is further projected from the branch panel 51, there are more branch points than the conventional modified Y-shaped soundproof wall, so that the height is increased by the damping effect due to multiple diffraction. Noise reduction efficiency is further improved without raising.

Moreover, according to the top structure 5, since there is no protruding portion on the adjacent land boundary side, the soundproof wall 1 can be installed as close as possible to the entire adjacent land boundary without crossing the adjacent land boundary, thus providing space. It can be used effectively.

[Second Embodiment]
Next, the soundproof wall 1'according to the second embodiment of the present invention will be described with reference to FIGS. 8 and 9. The only difference between the soundproof wall 1'according to the second embodiment and the soundproof wall 1 according to the first embodiment is that the above-mentioned top structure 5 is a top structure 5'. Mainly described, the same configuration is designated by the same reference numeral, and the description thereof will be omitted. FIG. 8 is a partially enlarged view similar to FIG. 6 showing the top structure 5'of the soundproof wall 1', and FIG. 9 is a perspective view showing the top structure 5'of the soundproof wall 1'.

As shown in FIGS. 8 and 9, the top structure 5'of the soundproof wall 1'according to the second embodiment of the present invention has a sound insulation panel 50'extending vertically in the vertical direction and a noise source from the sound insulation panel 50'. It is composed of a branch panel 51 and the like extending diagonally upward to the side. That is, the top structure 5'is not provided with the re-branch panel 52 of the top structure 5 described above. However, unlike the sound insulation panel 50 described above, the sound insulation panel 50'is integrated with the back plate of the metal housing 30 of the sound absorption panel 3 described above. Of course, the sound insulation panel 50'is not limited to the one in which the sound insulation panel 50'and the back plate of the metal housing 30 are integrated, and even if they are separate from each other and have a shape along the back plate of the metal housing 30 as described above. Similar to the sound insulation panel 50 (see FIGS. 6, 7, etc.), it may be a flat plate that extends straight upward.

Further, the above-mentioned sound absorbing member 53 is fixed to the lower surface of the branch panel 51 by bolting, fitting or engaging with the branch panel 51, and is detachably attached to the branch panel 51. As described above, in the top structure 5', the sound absorbing member 53 capable of absorbing the direct sound from the noise source is attached to the lower surface side of the branch panel 51 as in the above-mentioned top structure 5, so that the sound absorbing member 53 can be installed in the road or the railway. It is possible to effectively prevent the reflected sound from the installation object and the multiple reflected sound between the vehicle and the soundproof wall 1', which is a noise source.

Further, in the top structure 5', as in the top structure 5, a sound absorbing member 53 made of a fiber material or the like on which flying objects such as fallen leaves are easily caught is attached to the upper surface of the Y-shaped branch whose upper part is open. No. Therefore, maintenance work at the time of inspection becomes easy.

Further, in the top structure 5', a horizontal plate 55' extending in the horizontal direction from the upper end of the sound insulation panel 50 is formed, and a folded piece 56' that folds downward from the tip of the horizontal plate 55'is formed. .. Therefore, in the top structure 5', the interfering frequency band can be adjusted by the horizontal plate 55'and the folded piece 56', and noise can be reduced according to the characteristics of the sound source.

According to the soundproof wall 1'and the top structure 5'of the soundproof wall 1'according to the first embodiment of the present invention described above, like the soundproof wall 1, a Y-shape open upward where flying objects are likely to collect. There are few parts. Therefore, according to the top structure 5', there is little possibility that flying objects will accumulate, and it is not necessary to perform frequent cleaning or the like, so that maintainability is good.

Further, according to the top structure 5', the sound absorbing member 53 provided on the lower surface side of the branch panel 51 is also detachably configured, so that the sound absorbing material can be removed at the time of maintenance, and the maintainability is further improved. Is.

Moreover, according to the top structure 5', since there is no protruding portion on the adjacent land boundary side, the soundproof wall 1'can be installed as close as possible to the adjacent land boundary without crossing the adjacent land boundary. Space can be used effectively.

In addition, according to the top structure 5', it has a horizontal plate 55'and its folded piece 56'at the top, which can adjust the interfering frequency band and match the characteristics of the sound source. Noise can be reduced.

The soundproof walls 1, 1'and the top structures 5, 5'thereof according to the embodiment of the present invention have been described in detail above, but all of the above-mentioned or illustrated embodiments have been embodied in carrying out the present invention. It merely shows one embodiment. Therefore, the technical scope of the present invention should not be construed in a limited manner by these.

In particular, as a soundproof wall, a sound absorbing panel 3 having a sound absorbing material is installed below the top structure according to the present invention, but the soundproof wall according to the present invention has a sound absorbing wall below the top structure according to the present invention. A sound insulation plate or a light-transmitting plate made of a steel plate or a transparent panel without a material may be provided, or a combination of these may be provided for installation. This is because the above-mentioned action and effect of the top structure according to the present invention can be achieved, although the soundproofing effect is reduced as a whole of the soundproofing wall.

1,1': Soundproof wall 2: Supports 3,3': Sound absorbing panel 30: Metal housing 31: Sound absorbing material 32: Air layer 5,5': Top structure 50, 50': Sound insulating panel 51: Branch panel 52: Re Branch panel 53: Sound absorbing member 54: Side panel 55': Horizontal plate 56': Folded pieces 6, 6': Drainage mechanism 60: Drainage slits 61, 61': Drainage holes 62': Drainage drain M1: Fixing bracket

Claims (9)

It is the top structure of the soundproof wall that reduces the noise from the noise source.
It is provided with a sound insulation panel that is attached between columns and extends in the vertical direction, and a branch panel that extends diagonally upward from the sound insulation panel to the noise source side.
A top structure of a soundproof wall, characterized in that a removable sound absorbing member is attached to the lower surface side of the branch panel. It is the top structure of the soundproof wall that reduces the noise from the noise source.
It is provided with a sound insulation panel that is attached between columns and extends in the vertical direction, and a branch panel that extends diagonally upward from the sound insulation panel to the noise source side.
A top structure of a soundproof wall, characterized in that a re-branch panel extending diagonally downward from the branch panel is further provided. The top structure of a soundproof wall according to claim 2, wherein sound absorbing members are attached to both the lower surface of the branch panel and both sides of the re-branch panel. The top structure of a soundproof wall according to any one of claims 1 to 3, wherein a drainage mechanism for draining the precipitation accumulated between the branch panel and the sound insulation panel is provided. The top structure of a soundproof wall according to claim 4, wherein the drainage mechanism is a drainage hole formed in the branch panel. The top structure of a soundproof wall according to claim 4, wherein the drainage mechanism is a drainage slit provided in a side panel that closes a side surface between the branch panel and the sound insulation panel. The top structure of a soundproof wall according to any one of claims 1 to 6, wherein a sound absorbing member is provided on the upper side of the sound insulating panel on the opposite side of the noise source. According to any one of claims 1 to 7, a horizontal plate extending in the horizontal direction is provided on the upper portion of the sound insulation panel, and a folded piece that folds downward is formed at the tip of the horizontal plate. The top structure of the soundproof wall described. A soundproof wall that prevents the propagation of noise from noise sources.
A soundproof wall comprising the top structure of the soundproof wall according to any one of claims 1 to 8.

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