JP3587823B2 - Soundproof wall unit - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a soundproof wall unit used for a soundproof wall, and in particular, has a simple structure, can be manufactured at low cost, can be easily constructed, and prevents rainwater or the like from entering even during rainfall, so that the sound absorbing function is attenuated. The present invention relates to a sound-insulating wall unit that prevents noise and has a good sound insulation and sound absorption effect.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to reduce noise generated from a vehicle traveling on a road, a soundproof wall is installed along a side wall of a street or a highway.
Examples of the soundproof wall include those disclosed in Japanese Utility Model Laid-Open No. 7-25013 and Japanese Utility Model Laid-Open No. 51-78701.
Among them, the one disclosed in Japanese Utility Model Laid-Open No. 7-25013 discloses a housing formed of a perforated plate filled with a sound absorbing material such as glass wool and integrally formed in a panel shape. In Japanese Unexamined Utility Model Publication No. 51-78701, a plurality of cylindrical sound absorbing materials are arranged in parallel, and the irregularities along the outer surfaces of the sound absorbing materials are formed along both outer surfaces of the sound absorbing materials. The perforated plate thus formed is disposed and integrally formed in a panel shape.
[0003]
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional soundproof wall, since a perforated plate and a sound absorbing material are combined, rainwater infiltrates through the hole of the perforated plate into the inside of the soundproof wall during rainfall or the like, and this rainwater is removed. When the sound-absorbing material absorbs water, the sound-absorbing material has a problem that the sound-absorbing and sound-insulating effects are significantly reduced, and the sound-absorbing material that once absorbed water is difficult to dry. There was a problem that it could not be obtained.
[0004]
The present invention has been made in view of the above-mentioned problems of the conventional soundproof wall, has a simple structure, can be provided at a low cost, and can be easily performed, and prevents intrusion of rainwater and the like, without being affected by the weather. An object is to provide a soundproof wall unit having a good sound absorbing effect.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a soundproof wall unit according to the present invention includes a sound absorbing housing, a front housing plate having a large number of holes formed on a side surface of a noise source, and formed in a shape in which cylindrical surfaces are connected to each other, and opposed to the front housing plate. Non-porous, formed from a rear housing plate formed in a shape where the cylindrical surface is connected, and inside the sound absorbing housing, a thick plate-like sound absorbing material is disposed in the vertical direction, and on the inner surface of the front housing plate A waterproof material for preventing infiltration of rainwater into the sound absorbing housing along the inner surface of the front housing plate via a holding material .
[0006]
This soundproof wall unit is composed of a front housing plate in which a sound absorbing housing is provided with a large number of holes on the side of the noise source and has a cylindrical surface connected to the front housing plate, and a non-porous cylindrical surface connected to the front housing plate. And a rear casing plate formed in a shape having a rectangular shape, and a sound absorbing material in the form of a thick plate is disposed in the sound absorbing casing in the vertical direction, and rainwater flows into the sound absorbing casing along the inner side surface of the front casing board. Since a waterproof material for preventing intrusion is provided, the structure is simplified, and the usage of the sound absorbing material can be reduced without lowering the sound absorbing performance.
And, even if rainwater enters from the perforated portion of the front housing plate, the waterproofing material arranged along the inner side surface of the front housing plate prevents the waterproof material from penetrating into the inside and forms a non-woven fabric. The water is drained to the outside from the lower portion of the front housing plate through the waterproof material, so that the sound absorbing material does not absorb water, and the sound insulation and soundproofing effects are not reduced even during rainfall.
Furthermore, by supporting the waterproof material so as to be disposed along the inner surface of the front housing plate via the holding material, the waterproof material is supported by the holding material. In addition to being able to be easily disposed along the front housing plate, even when the shape of the inner surface of the front housing plate is deformed, it can be always supported along the inner surface of the front housing plate, and it is possible to effectively prevent rainwater from entering.
[0007]
In this case, it is possible to arrange and arrange the joints that connect the sound absorbing housings that overlap in the vertical direction to each other at the upper and lower end surfaces in the longitudinal direction of the sound absorbing housing.
[0008]
Thus, it is possible to simply configure the sound-absorbing housing at the height of the designed predetermined soundproof wall only by stacking the sound-absorbing housings in the vertical direction, and it is possible to reduce the production cost and the construction cost.
[0009]
Further, the sound absorbing housing can be arranged in a direction in which the cylindrical surfaces of the front housing plate and the rear housing plate extend in the horizontal direction.
[0010]
Thus, it is possible to prevent noise from leaking to the surroundings and to improve the appearance.
[0011]
In addition, synthetic resin fibers whose main constituent is flame-retardant fibers such as vinylidene chloride-vinyl chloride copolymer fibers, acrylonitrile-vinyl chloride copolymer fibers, and acrylonitrile-vinylidene chloride copolymer fibers as a sound absorbing material and / or a waterproof material. Can be used to form a block having a predetermined shape.
[0012]
As a result, unlike conventional sound-absorbing materials, glass wool does not scatter and cause environmental destruction, and the color can be easily applied.It is necessary to cover the surface of the sound-absorbing material with a synthetic resin film. Because of this, the manufacturing cost is low, and the water resistance to rainwater, etc., and the chemical resistance to exhaust gas are high, and it is possible to apply colors that are in harmony with the surrounding environment without destroying the surrounding environment. Thus, a sound absorbing member having high safety against fire can be obtained.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the soundproof wall unit of the present invention will be described with reference to the drawings.
[0014]
1 to 4 show one embodiment of the soundproof wall unit of the present invention.
As shown in FIG. 4, the soundproof wall unit A includes a sound-absorbing housing 1 and a plurality of (four in this embodiment) sound-absorbing housings 1 arranged in a vertically stacked manner. The body 1 has both ends fixed and mounting brackets 5 which can be installed between the columns 6, 6 arranged at regular intervals.
[0015]
As shown in FIG. 1, the sound-absorbing housing 1 includes a front housing plate 1A provided with a large number of holes and formed in a shape in which cylindrical surfaces are connected to each other. The main body portion of the sound-absorbing housing 1 is formed integrally with a rear housing plate 1B having a non-porous shape and a cylindrical surface connected to each other so as to be in a vertical direction. A thick sound absorbing material 2 is provided, and a waterproof material for preventing rainwater from entering the sound absorbing housing 1 along the inner surface of the front housing plate 1A is supported by the holding material 4 and provided. Further, joints 1C and 1D are provided at upper and lower portions of a main body portion of the sound absorbing housing 1, respectively.
[0016]
The sound absorbing housing 1 is disposed in a direction in which the cylindrical surfaces of the front housing plate 1A and the rear housing plate 1B extend in the horizontal direction so as to increase the strength and enhance the appearance of the soundproof wall unit.
For this reason, although not particularly limited, for example, as shown in FIG. 1, a plate-shaped front housing plate 1A and a rear housing plate 1B are formed by a plurality of cylindrical surfaces (in this embodiment, three cylindrical surfaces). Surface).
In this case, the front housing plate 1A and the rear housing plate 1B are symmetrical, and three semicircular arc-shaped pieces 11, 11, 11 are arranged via flat connecting pieces 12, 12, respectively. In addition, an infinite number of small holes 13 are formed over substantially the entire surface of the semicircular arc-shaped piece 11 of the front housing plate 1A, so that noise generated due to the passage of a vehicle or the like is absorbed through the small holes 13. The semicircular piece 11 of the rear casing plate 1B is made non-porous while penetrating into the inside of the casing 1.
Thus, when the front housing plate 1A and the rear housing plate 1B are opposed to each other, the connecting pieces 12 of the flat front housing plate 1A and the connecting pieces 12 of the rear housing plate 1B are formed as shown in FIG. The two connecting pieces 12 and 12 in contact with each other are fixed with a stopper such as an anchor or a screw, or are fixed by welding, bonding, or the like. And unite.
In this case, both outer ends of the semicircular pieces 11 of the front housing plate 1A and the rear housing plate 1B are brought into abutment with each other, and are connected and fixed thereto by the joints 1C and 1D. To
[0017]
A waterproof material 3 is provided on the inner surface of the front housing plate 1A. The waterproof material 3 is provided along the inner surface of the semicircular piece 11 having a hole shape. The rainwater entering through the hole 13 is prevented from entering the sound absorbing material 2 side.
The waterproof member 3 is supported by the holding member 4 so that even if the shape of the semicircular arc-shaped piece 11 is distorted, the semicircular piece 11 can exactly follow the shape.
An elastic plate or an elastic wire is used for the holding member 4 so that the waterproof member 3 closely follows the inner surface of the semicircular piece 11. When an elastic plate is used, a perforated plate is used if it is to be along the entire surface of the waterproof material 3, and if it is not to be along the entire surface of the waterproof material 3, the waterproof material 3 is an inner surface of the semicircular piece 11. A band-like plate that is held along the shape is used and arranged at appropriate intervals. Thereby, even if the waterproof material 3 is held along the inner surface of the semicircular arc-shaped piece 11, noise can enter the inside through the waterproof material 3.
Further, both ends of the holding member 4 can be engaged along the inner surface of the front housing plate 1A, but in the illustrated embodiment, the end of the holding member 4 is connected to the end surface of the sound absorbing material 2. The sound absorbing material 2 can be held at a predetermined position by utilizing the elasticity of the sound absorbing material 2.
[0018]
The sound absorbing material 2 is disposed in a cylindrical body formed by semicircular arc-shaped pieces 11, 11 of a front housing plate 1A and a rear housing plate 1B facing each other, and along a vertical diameter thereof. Then, both end surfaces of the sound absorbing material 2 are pressed against the peripheral surface of the cylindrical body, or are fitted so as not to form a gap, whereby the sound absorbing material 2 penetrates into the cylindrical body from the perforated semicircular piece 11 of the front housing plate 1A. The noise to be absorbed is surely absorbed by the sound absorbing material 2 so as not to leak from the gap between the inner peripheral surface of the cylindrical body and the end surface of the sound absorbing material 2 to the side opposite to the noise entry side.
[0019]
In addition, the sound-absorbing housing 1 has a required thickness and length so that the soundproof wall can be easily constructed. Specifically, although not particularly limited, for example, the thickness of the semicircular piece constituting the cylindrical body is determined to be 200 to 500 mm, preferably 150 to 200 mm, and The length of the connecting piece 12 is formed to be 10 to 30 mm, preferably about 15 mm, and the length of one unit of the sound absorbing housing 1 is formed to be about 1000 to 5000 mm, preferably about 2000 to 4000 mm.
The sound absorbing housing 1 is configured to have strength enough to withstand a wind load even when used alone.
[0020]
The sound-absorbing housing 1 is made of metal such as aluminum, aluminum alloy, stainless steel or a synthetic resin. In particular, the front housing plate 1A is made of a punching metal or an expanded metal having a large number of holes, and a smaller hole. A perforated plate such as an aluminum fiber plate or an aluminum foam plate can be used, and a non-perforated plate without such holes is used as the rear housing plate 1B.
The material of the front housing plate 1A and the material of the rear housing plate 1B may be the same or different, but the semicircular pieces 11 are each formed in the shape of an arc having the same curvature, and are formed in a semicircular shape parallel to the horizontal. The intervals between the pieces 11 are made uniform.
As the perforated plate forming the front housing plate 1A, a perforated plate having a large number of holes is used. However, the forming method and diameter of the holes are not particularly limited, and the forming range of the holes (semicircular shape) The range of the angle in the circumferential direction of the hole formed in the piece 11 is determined so as to face the noise source, and the aperture ratio of the perforated plate is set to an appropriate value, for example, the aperture ratio is set to about 40%. can do.
The non-perforated plate forming the rear housing plate 1B has a sound insulating effect, and has a predetermined thickness so that noise leakage to the outside can be prevented without installing a separate sound insulating wall. Is used.
[0021]
The two outer ends of the semicircular arc-shaped piece 11 of the front housing plate 1A and the rear housing plate 1B abut against each other, and joints 1C and 1D are arranged at the abutting portions. 1A and the rear housing plate 1B are integrated.
When the sound-absorbing housings 1 are vertically stacked, one of the joints 1C and 1D has a convex shape so as to engage and connect the sound-absorbing housings that are vertically overlapped with each other. Then, the other joint 1D is made concave.
[0022]
In the present embodiment, the upper joint-shaped joint 1C supports the front housing plate 1A and the rear housing plate 1B along the inside of the front end of the semicircular arc-shaped pieces 11, 11 facing each other. And a joining tool main body 15 provided with a projecting piece 17 and joined so that the plate thickness of the tip of the semicircular arc-shaped pieces 11, 11 to be joined is substantially equal to the thickness. Inserting grooves 16 are formed on both side surfaces of the fitting body 15 for inserting and locking the distal ends of the semicircular pieces 11, 11, and projecting pieces 17 are formed on the outer surface of the fitting body 15. To protrude. Note that, in this case, the support piece 14 may be capable of locking the end of the sound absorbing material 2 inserted into the cylindrical body.
[0023]
Further, in the present embodiment, the joint 1D having the lower concave shape is used to support the inside of the distal end of the semicircular arc-shaped pieces 11, 11 of the front housing plate 1A and the rear housing plate 1B facing each other. A piece 14 and a fitting body 15 having a locking groove 19 are provided, and the thickness of the fitting body 18 is set to be substantially equal to the plate thickness of the tip of the semicircular arc-shaped pieces 11, 11 to be abutted. Inserting grooves 16 are formed on both side surfaces for inserting and locking the tips of the semicircular pieces 11, 11, and the protruding pieces 17 are fitted on the outer surface of the joint body 18. The locking groove 19 is formed so that the locking can be performed.
[0024]
In addition, regardless of whether the material of the front housing plate 1A and the rear housing plate 1B constituting the sound absorbing housing 1 is made of metal or synthetic resin, a weather resistance and a water resistance treatment are performed as necessary. In addition, the surface of the sound-absorbing housing 1 can be colored, a pattern, or the like can be drawn to enhance the appearance.
[0025]
As shown in FIG. 1, the sound-absorbing material 2 provided in the cylindrical body of the sound-absorbing housing 1 may be formed in an arbitrary form such as a thick plate or a rectangular block according to the shape of the cylindrical body. The material can be formed of glass wool, rock wool, synthetic resin fiber, synthetic resin, or the like, although the material is not particularly limited, thereby using the sound absorbing material without deteriorating the sound absorbing performance. The amount can be reduced, the insertion into the cylinder can be simplified, and the production cost can be reduced.
[0026]
In particular, the sound-absorbing material 2 is made of synthetic resin fiber, specifically, chloride having high water resistance against rainwater and the like, high chemical resistance against exhaust gas and the like, and having a self-extinguishing property that does not burn by burning a flame. Such as vinylidene (VDC) -vinyl chloride (VC) copolymer fiber, acrylonitrile (AN) -vinyl chloride (VC) copolymer fiber, acrylonitrile (AN) -vinylidene chloride (VDC) copolymer fiber, and other acrylic synthetic fibers. A block formed by entanglement of flame-retardant fibers (hereinafter simply referred to as “flame-retardant fibers”) into a predetermined shape can be suitably used.
Further, the flame-retardant fiber may be entangled with a shape-retaining material to form a block having good shape-retaining property. In this case, a polyester (PE) fiber as a shape-retaining material and a fiber made of a synthetic resin material such as polypropylene (PP) having a lower melting point than a flame-retardant fiber having a weather resistance as a bridging agent are tangled. At the same time, the entire body is heated to melt the low-melting fibers, and the flame-retardant fibers are combined, so that a block formed into a predetermined shape can be suitably used.
[0027]
In this case, the flame-retardant fiber is 3 to 30 denier, preferably 2 to 3 denier and 20 to 30 denier, and the polyester fiber used as the shape-retaining material is substantially equal to the flame-retardant fiber. 2 to 30 denier, preferably 3 to 15 denier and 20 to 30 denier, and the fiber having a lower melting point than the flame retardant used for the bridging agent is 3 to 30 denier, which is substantially equal to the flame retardant fiber. Preferably, 3 to 15 deniers and 20 to 30 deniers are used, flame-retardant fibers are used at 40 to 80% by weight, preferably 65 to 75% by weight, polyester fibers and low melting point fibers are used at 10 to 10% respectively. It is used in a ratio of 40% by weight, preferably 12.5 to 30% by weight, and both are entangled and the low-melting-point fiber is melted to bond the flame-retardant fiber. .
In addition, two types of flame-retardant fiber of 3-15 denier and 20-30 denier, two types of polyester fiber of 3-15 denier and 20-30 denier, and two types of 3-15 denier and 20-30 denier When fibers having a lower melting point than the combustible fibers are used, it is desirable that the two types of fibers be mixed in substantially equal amounts.
This makes it possible to obtain a synthetic fiber nonwoven fabric block that is homogeneous, has good shape retention properties, is hardly deformed, and can maintain a high noise reduction effect over a long period of time, and can be used as the sound absorbing material 2.
[0028]
As the waterproof material 3, a material for preventing infiltration of rainwater is used, and is not particularly limited, but a material similar to the sound absorbing material 2 and formed in a plate shape having a predetermined thickness is used. To do. In addition, the thickness of the fiber is set to be larger than the fiber of the waterproof material 2, so that rainwater entering through the small holes 13 is blocked by the waterproof material 3, flows down along the waterproof material 3, and forms a semicircular arc. Water is drained to the outside through a small hole 13 formed below the shape piece 11.
[0029]
As shown in FIGS. 2 and 3, mounting brackets 5 are attached to both ends of the sound absorbing housing 1.
The mounting bracket 5 fixes both ends of the sound-absorbing housing 1 so that it can be installed between the columns 6 and 6, and is fitted to an end of the sound-absorbing housing 1 and is not particularly limited. A fixing piece 50 fixed by using a blind rivet or the like, and an engaging piece 51 projecting from the fixing piece 50 and inserted into the groove 61 of the column 6 made of H-shaped steel or the like. Become.
Further, the width of the engagement piece 51 is formed to be smaller than the width of the groove 61 on the side surface of the column 6 made of H-shaped steel or the like. Then, it is fitted into the groove 61 on the side surface of the column 6 and fixed via the fixture 7.
[0030]
Next, a method of constructing a soundproof wall using the soundproof wall unit A will be described.
Along the road, the columns 6, 6 are established at a predetermined interval, for example, at an interval of 1000 to 5000 mm, preferably at an interval of 2000 to 4000 mm by a conventional method. The column 6 is made of H-shaped steel or the like, but is not limited to this, as long as the column 6 has a groove 61 into which the engaging piece 51 can be inserted.
The soundproof wall unit A is inserted between the columns 6 and 6 established in this manner so that the perforated front housing plate 1A is dropped into the groove 61 from above the columns 6 with the side of the front housing plate 1A facing the roadway. . In this case, the engagement pieces 51, 51 of the mounting bracket 5 of the soundproof wall unit A are dropped into the groove 41 of the support column 6, but there is a gap between the engagement pieces 51 in the groove 61.
Then, after dropping the soundproof wall unit A, as shown in FIG. 3, a fixing member 7 made of rubber or other material is inserted into a gap between the groove 61 of the column 6 and the engaging piece 51 of the mounting bracket 5, and Thereby, the engaging piece 51 of the mounting bracket 5 is pressed against the inner surface of the groove 61 of the support column 6 to be fixed. In this way, the plurality of soundproof wall units A are sequentially inserted and fixed between the columns 6, 6 to construct a desired soundproof wall.
[0031]
As described above, the soundproof wall unit of the present invention has been described based on one embodiment. However, the present invention is not limited to the structure described in the above embodiment, and the structure may be appropriately changed without departing from the gist thereof. It can be changed.
[0032]
【The invention's effect】
According to the soundproof wall unit of the present invention, the sound absorbing housing has a large number of holes on the side of the noise source, and a front housing plate formed in a shape in which the cylindrical surfaces are connected, and a non-porous shape opposed to the front housing plate. A rear housing plate formed in a shape in which cylindrical surfaces are connected to each other, and a thick plate-like sound absorbing material is disposed in the sound absorbing housing in the longitudinal direction, and the inside of the sound absorbing housing is formed along the inner surface of the front housing plate. The structure is simple because it is provided with a waterproof material that prevents the ingress of rainwater into the structure, reducing the amount of sound absorbing material used without deteriorating the sound absorbing performance, and absorbing the sound absorbing material and the waterproof material. The work of inserting into the housing can be simplified, and the production cost can be reduced.
And, even if rainwater enters from the perforated portion of the front housing plate, the waterproofing material arranged along the inner side surface of the front housing plate prevents the waterproof material from penetrating into the inside and forms a non-woven fabric. The water is drained to the outside from the lower part of the front housing plate through the waterproof material, so that it is not absorbed by the sound absorbing material, and the sound insulation and soundproofing effect does not decrease even during rainfall, regardless of the weather Sound insulation and sound absorption effects can be obtained.
Furthermore, by supporting the waterproof material so as to be disposed along the inner surface of the front housing plate via the holding material, the waterproof material is supported by the holding material. In addition to being able to be easily disposed along the front housing plate, even when the shape of the inner surface of the front housing plate is deformed, it can be always supported along the inner surface of the front housing plate, and it is possible to effectively prevent rainwater from entering.
[0033]
In addition, by arranging a joining device that connects the sound-absorbing housings that are vertically overlapped to each other on the upper and lower end surfaces in the longitudinal direction of the sound-absorbing housing, the sound-absorbing housings can be simply overlapped in the vertical direction. Thus, it is possible to easily configure the soundproof wall at a predetermined height of the designed soundproof wall, and it is possible to reduce the production cost and the construction cost.
[0034]
In addition, by arranging the sound-absorbing housing in a direction in which the cylindrical surfaces of the front housing plate and the rear housing plate extend in the horizontal direction, it is possible to prevent noise from leaking to the surroundings and improve the appearance. it can.
[0035]
In addition, synthetic resin fibers whose main constituent is flame-retardant fibers such as vinylidene chloride-vinyl chloride copolymer fibers, acrylonitrile-vinyl chloride copolymer fibers, and acrylonitrile-vinylidene chloride copolymer fibers as a sound absorbing material and / or a waterproof material. By using a block body formed into a predetermined shape by entanglement, it does not cause glass wool to scatter and cause environmental destruction unlike conventional sound-absorbing materials, and can easily apply color. Since the surface of the sound absorbing material does not need to be covered with a synthetic resin film, the manufacturing cost is low, and furthermore, the water resistance to rainwater and the like, the chemical resistance to exhaust gas and the like are high, and the surrounding environment is destroyed. It is possible to obtain a sound-absorbing member that can provide colors that are in harmony with the surrounding environment, and that is highly safe against fire.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a sound-absorbing housing showing one embodiment of a soundproof wall unit of the present invention.
FIGS. 2A and 2B show the entire sound-absorbing housing of the present invention, wherein FIG. 2A is a front view of the front housing plate side in the left half and the rear housing plate side in the right half, and FIG. It is an enlarged detail view.
FIG. 3 is a plan view showing a state where the soundproof wall unit is attached to a support.
4A and 4B show a soundproof wall to which the soundproof wall unit of the present invention is applied, wherein FIG. 4A is a front view, FIG. 4B is a side view, and FIG.
[Explanation of symbols]
A Soundproof wall unit 1 Sound absorbing housing 1A Front housing plate 1B Back housing plate 1C Joiner 1D Joiner 11 Semicircular arc-shaped piece 12 Connecting piece 13 Small hole 14 Supporting piece 15 Joiner body 16 Insertion groove 17 Projection piece 18 Joint body 19 Lock groove 2 Sound absorbing material 3 Waterproof material 4 Holding material 5 Mounting bracket 50 Fixing piece 51 Engagement piece 6 Support column 61 Groove 7 Fixing tool

Claims (4)

A front housing plate that has a large number of holes on the side of the noise source and has a continuous cylindrical surface, and a non-porous back surface that has a non-porous cylindrical surface connected to the noise-absorbing housing. A water-absorbing material which is formed from a housing plate, and in which a thick-plate-shaped sound-absorbing material is disposed in the sound-absorbing housing in a vertical direction, and which prevents rainwater from entering into the sound-absorbing housing along the inner surface of the front housing plate. , Disposed along the inner surface of the front housing plate via a holding material . 2. The soundproof wall unit according to claim 1, wherein a joining tool is provided on upper and lower end surfaces in the longitudinal direction of the sound absorbing housing so as to connect the sound absorbing housings vertically overlapping each other. 3. The soundproof wall unit according to claim 1, wherein the sound absorbing housing is disposed in a direction in which cylindrical surfaces of the front housing plate and the rear housing plate extend in the horizontal direction. Synthetic resin fibers mainly composed of flame-retardant fibers such as vinylidene chloride-vinyl chloride copolymer fibers, acrylonitrile-vinyl chloride copolymer fibers, and acrylonitrile-vinylidene chloride copolymer fibers are used as the sound absorbing material and / or the waterproofing material. The soundproof wall unit according to claim 1, 2 or 3, wherein a block body formed into a predetermined shape by being entangled is used.

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