Sound proof wall

Abstract

To provide a soundproof wall which is lightweight, easy to transport and easy to install at a site, and high in soundproof performance.SOLUTION: A sound proof wall has: a wall body; and an eaves body provided on a front upper part of the wall body. The wall body has: an FRP wall material having a rectangular shape in a plan view; and a wall sound absorber disposed on a surface of the FRP wall material. The FRP wall material has: a vertical panel having a flat plate shape; side walls protruding forward from both sides of the vertical panel in a height direction; and a T-shaped rib protruding forward from a front surface of the vertical panel in a vertical direction. The eaves body has: an eaves panel having a rectangular shape in plan view; an upper sound absorber disposed on an upper surface of the eaves panel; a lower sound absorber disposed on a lower surface of the eaves panel; sound absorber fixing members disposed on both side surfaces of the eaves panel; and an eaves fixing member protruding from the lower surface of the eaves panel. The eaves panel has: a flat plate-like plate body; and a sound absorbing body pressing part in which an upper end and a lower end of the plate body are formed in a T-shape and a tip of the T-shape is folded back in parallel with the plate body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a soundproof wall. [Background technology]

[0002] On railways and roads, such as the Shinkansen and conventional lines, noise generated when vehicles travel can affect the surrounding area. For this reason, soundproof walls are sometimes installed to prevent noise from propagating to the outside. In particular, the Shinkansen train, which travels at high speeds, experiences increased air resistance and noise from the wheels hitting the tracks, which increases the noise impact on the surrounding area. Therefore, soundproof walls are installed along the tracks to reduce this noise.

[0003] Conventional soundproof walls have been made of heavy concrete, but concrete deteriorates over time and is too heavy to be easily damaged by the underlying structures such as viaducts. Because of the large load on the walls, in recent years, lightweight fiber reinforced plastic (FRP) soundproof walls have been adopted instead of concrete soundproof walls. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-239319 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-68018 [Patent Document 3] Japanese Patent Publication No. 2020-122271 Summary of the Invention [Problem to be solved by the invention]

[0005] The FRP soundproof wall described in Patent Document 1 has enhanced soundproofing performance by incorporating a core material inside, but incorporating a core material increases the weight of the soundproof panels that make up the soundproof wall, making transportation and on-site installation labor-intensive. The FRP soundproof wall described in Patent Document 2 has a hollow structure. Hollow structure soundproof walls are lightweight and easy to transport and install on site, but due to the resonance phenomenon caused by the air in the internal space, sound transmission loss in certain frequency bands decreases, resulting in a soundproof wall with poor soundproofing performance.

[0006] Patent Document 3 solves the problems with the FRP soundproof walls described in Patent Documents 1 and 2 above, but there is a problem that noise may escape upward from the soundproof wall.

[0007] An object of the present invention is to provide a soundproof wall that is lightweight, easy to transport and install on site, and has high soundproofing performance. [Means for solving the problem]

[0008] In order to achieve the above object, the soundproof wall of the present invention comprises a wall body and an eave body provided on the upper front surface of the wall body, the wall body comprising an FRP wall material that is rectangular in plan view and a wall sound absorbing body that is provided on the surface of the FRP wall material, the FRP wall material comprising a flat vertical panel, side walls that protrude forward in the height direction on both sides of the vertical panel, and a T-shaped rib that protrudes forward in the up-down direction on the front surface of the vertical panel, and the eave body comprises an eave panel that is rectangular in plan view, an upper surface sound absorbing body that is provided on the upper surface of the eave panel, a lower surface sound absorbing body that is provided on the lower surface of the eave panel, sound absorber fixing materials that are provided on both side surfaces of the eave panel, and eave fixing members that protrude from the lower surface of the eave panel. The eaves panel has a flat plate body and sound-absorbing body suppressing parts with T-shaped upper and lower ends of the plate body and the tip of the T folded back parallel to the plate body, the eaves body has the eaves fixing material fixed to the ribs of the FRP wall material and is arranged to protrude from the upper front surface of the wall body and tilt upward, the sound absorber, upper sound absorber and lower sound absorber are approximately rectangular plate bodies, the wall sound absorbers are arranged between the side walls and the ribs of the FRP wall material and between the parallel ribs, and the upper and lower sound absorbers are suppressed around the top and bottom edges by the sound-absorbing body suppressing parts at the top and bottom edges of the eaves panel and by the sound-absorbing body fixing materials on both sides of the eaves panel. The vertical panel may have a wall flange projecting from the rear surface of the side edge of the vertical panel in a direction parallel to the vertical panel. The sound absorber fixing material may have an eave flange that projects parallel to the eave panel from the upper surface thereof. The rib consists of a first rib located on the lower side and a second rib located above the first rib, the protruding length of the first rib from the vertical panel is longer than the protruding length from the vertical panel of the side wall, the protruding length of the second rib from the vertical panel is approximately the same as the protruding length from the vertical panel of the side wall, and a eaves fixing material of the eaves body may be fixed to the upper part of the first rib. [Effects of the Invention]

[0009] The present invention provides a means for solving the above-mentioned problems, and can achieve at least one of the following effects. (1) The wall materials, eaves, and sound-absorbing materials that make up the soundproof wall are all lightweight, making them easy to transport and install on site. (2) By placing an upwardly inclined canopy on the front of the wall, noise propagating upward from the wall can be absorbed. (3) High soundproofing performance can be achieved by installing sound-absorbing materials on the surface of the wall material and the surface of the eaves. (4) By placing an upper surface sound absorber on the upper surface of the canopy, noise propagating along the upper surface of the canopy can be absorbed. (5) The wall sound-absorbing material of the wall surface and the upper and lower sound-absorbing materials of the eaves have large exposed areas, so they exhibit high sound-proofing performance. [Brief explanation of the drawings]

[0010] [Figure 1] A perspective view of a soundproof wall according to the present invention. [Figure 2] Perspective view of the wall and eaves [Figure 3] Perspective view of FRP wall material [Figure 4] Wall cross section [Figure 5] Perspective view of the canopy [Figure 6] Perspective view of eaves panel [Figure 7] Cross section of the canopy [Figure 8] Exploded perspective view of the eaves fixing material of the eaves body [Figure 9] Perspective view of the mounting bracket DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this description, expressions relating to directions such as front-rear, up-down, etc. are defined based on the soundproof wall of the present invention, with the "forward" meaning the direction from the soundproof wall to the roadway on which the vehicle generating the noise is traveling, the "up-down" meaning the height direction of the soundproof wall, and the "lateral" meaning the direction perpendicular to the forward and up-down directions.

[0012] [Example 1] <1> Soundproof wall configuration The soundproof wall of the present invention is installed in parallel to prevent noise generated when a vehicle is running from propagating to the outside, and comprises a wall body 1 and a canopy body 2 installed on top of the wall body 1 (Figures 1 and 2).

[0013] <2> wall The wall 1 is constructed by combining an FRP wall material 3 with a wall sound absorber 4 placed on the surface (front) of the FRP wall material 3. Since the wall sound absorber 4 is placed on the surface of the wall 1, high soundproofing performance is achieved.

[0014] <2.1> FRP wall material The FRP wall material 3 is a member made of fiber reinforced plastic (FRP) or glass fiber reinforced plastic (GFRP). The FRP wall material 3 consists of a vertical panel 5 that is a flat rectangular plate when viewed from above, side walls 6 that protrude vertically from both sides of the vertical panel 5, a rib 7 that protrudes vertically from the front of the vertical panel 5 in the same direction as the side walls 6, and a wall flange 8 that is attached to one side of the vertical panel 5 (Figure 3). The vertical panel 5, side wall 6, rib 7 and wall flange 8 are integrally formed.

[0015] <2.2> Side wall The side wall 6 is an L-shaped member in plan view, which projects perpendicularly from the side edge of the vertical panel 5 and has a pressing portion 61 bent at its tip parallel to the vertical panel 5 (FIG. 4). Since the wall sound absorber 4 is fitted between the vertical panel 5 and the retaining portion 61 , the protruding length of the side wall 6 is set to be approximately the same as the thickness of the wall sound absorber 4 .

[0016] <2.3> Rib The rib 7 is a T-shaped member in plan view. The rib 7 protrudes from the vertical panel 5 in two stages of length. The lower side of the vertical panel 5 is the first rib 71, which protrudes longer than the side wall 6, and the upper side of the vertical panel 5 is the second rib 72, which protrudes the same length as the side wall 6 (Figure 3). The first rib 71 has a metal fitting fixing hole 711 at the bottom for fixing a mounting metal fitting 9 (described later) thereto, and a canopy fixing hole 712 at the top for fixing the canopy body 2 thereto. The second rib 72 has a retaining portion 73 at its protruding tip that is parallel to the vertical panel 5. By providing the retaining portion 73 also on the first rib 71, the wall sound absorber 4 fits between the vertical panel 5 and the retaining portion 73.

[0017] <2.4> Flanges The wall flange 8 is flat and projects parallel to the vertical panel 5 from the rear surface of the side edge of the vertical panel 5 . When a plurality of FRP wall materials 3 are erected with the sides of the vertical panels 5 aligned, the wall flange 8 is located on the rear surface of the joint between the sides. By providing the wall flange 8, gaps between adjacent FRP wall materials 3 are eliminated, and forces acting in a direction perpendicular to the surface of the wall body 1 are dispersed to the adjacent wall body 1 via the wall flange 8. In addition, by providing a sealing material 81 made of sponge or the like on the front surface of the wall flange 8, gaps between the front surface of the wall flange 8 and the FRP wall material 3 are eliminated, improving the soundproofing performance of the soundproof wall.

[0018] <3> Wall sound absorber The wall sound absorber 4 converts the energy of incident sound into thermal energy, thereby reducing the energy of reflected sound. The wall sound absorber 4 is made of polyester fiber nonwoven fabric formed into a rectangular plate. A surface material (not shown) made of polyester fiber spunbond nonwoven fabric is heat-sealed to at least the sound incident side, thereby achieving excellent sound absorption performance. Furthermore, by applying a water-repellent treatment to the surface material, it can also serve as a waterproof protective material for the wall sound absorber 4. The surface material may be provided on the entire surface, not just on the sound incident side. The polyester fiber nonwoven fabric that is the material that makes up the wall sound absorber 4 is lightweight, has excellent sound absorption properties, and is environmentally friendly because it can be recycled.It also has excellent weather resistance, durability, water resistance, and chemical resistance, making it a material that can be used stably over the long term. The wall sound absorbers 4 are placed between the side walls 6 and ribs 7 of the upright FRP wall material 3, or between the parallel ribs 7, so the width of the wall sound absorbers 4 is adjusted to match the spacing of the placement positions. The height of the wall sound absorbers 4 is the same as that of the FRP wall material 3, and the thickness is approximately the same as the height of the protruding side walls 6 and second ribs 72. The wall sound absorber 4 is arranged between the side wall 6 and the rib 7 of the vertical panel 5 or between the parallel ribs 7, and the side edge part is only pressed down by the pressing part 61 of the side wall 6 or the pressing part 73 of the rib 7, so that the exposed part is large and the soundproof wall has high soundproofing performance.

[0019] <4> top lid An upper cover 31 may be provided on the upper end of the FRP wall material 3 (FIG. 2). The upper cover 31 is an L-shaped member that is placed between the upper ends of the side walls 6 at both ends and is fixed to the retaining portions 61 of the side walls 6 and the retaining portions 73 of the ribs 7. The upper cover 31 is made of FRP or GFRP, just like the FRP wall material 3. By covering the top of the wall sound absorber 4 with the upper lid 31, water can be prevented from entering the inside of the wall sound absorber 4.

[0020] <5> eaves The canopy body 2 projects from the upper front surface of the wall body 1 and is arranged at an angle facing upward. By being arranged at an angle facing upward, noise propagating upward from the wall body 1 can be absorbed. The eaves body 2 has an eaves panel 21, an upper surface sound absorber 22 arranged on the upper surface of the eaves panel 21, a lower surface sound absorber 23 arranged on the lower surface of the eaves panel 21, sound absorber fixing materials 24 arranged on both side surfaces of the eaves panel 21, and an eaves fixing material 25 that protrudes from the lower surface of the eaves panel 21 and connects to the rib 7 of the wall body 1 (Figs. 5(a)(b)). Since the upper surface sound absorber 22 and the lower surface sound absorber 23 are installed on the surface of the eaves body 2, high soundproofing performance is achieved. Furthermore, by placing the upper surface sound absorber 22 on the upper surface of the eaves body 2, noise that propagates along the upper surface of the eaves body 2 can be absorbed.

[0021] <5.1> Eaves panel The eaves panel 21 has a flat plate body 211 that is rectangular in plan view, and sound absorber suppressing portions 212 that are T-shaped in plan view at the top and bottom ends, with the tip of the T folded back parallel to the plate body 211 (Fig. 6). Since the sound absorber suppressing portions 212 accommodate the top and bottom ends of the upper surface sound absorbers 22 and lower surface sound absorbers 23 that are arranged on the top and bottom surfaces of the eaves panel 21, the distance between the plate body 211 and the folded back sound absorber suppressing portions 212 is set to be approximately the same as the thickness of the upper surface sound absorbers 22 and lower surface sound absorbers 23. The eaves panel 21 is made of FRP or GFRP, like the FRP wall material 3.

[0022] <5.2>Top sound absorber, bottom sound absorber The upper sound absorber 22 and the lower sound absorber 23, like the wall sound absorber 4, reduce the energy of reflected sound by converting the energy of incident sound into thermal energy, and are made of polyester fiber nonwoven fabric formed into rectangular plates. Furthermore, a surface material (not shown) made of polyester fiber spunbond nonwoven fabric is heat-sealed to the upper surface of the upper sound absorber 22 and the lower surface of the lower sound absorber 23. The upper sound absorber 22 and the lower sound absorber 23 are only pressed down at their peripheral portions by the sound absorber pressing portion 212 and the sound absorber fixing material 24, so that the exposed portions are large, resulting in a soundproof wall with high soundproofing performance.

[0023] <5.3>Sound absorber fixing material The sound absorber fixing member 24 is a U-shaped member in a plan view, and is placed on both sides of the eaves panel 21, and houses the upper sound absorber 22, the plate body 211 of the eaves panel 21, and the lower sound absorber 23 inside (Figs. 5 and 7). The sound absorber fixing material 24, the upper sound absorber 22, the plate body 211 of the eaves panel 21, and the lower sound absorber 23 are fixed together by a bolt 241 and a nut 242 that pass through all of them. Further, similar to the wall flange 8 provided on the FRP wall material 3, the sound absorber fixing material 24 is provided with a protruding eaves flange 243 that closes the gap between adjacent eaves bodies 2. The eaves flange 243 is L-shaped, with one side fixed to the side of the sound absorber fixing material 24 and the other side protruding from the top surface of the sound absorber fixing material 24 parallel to the eaves panel 21, so that when multiple eaves bodies 2 are lined up side by side, the wall flange 8 is located at the rear surface of the joint between the side edges. By providing the eaves flange 243, gaps between the eaves bodies 2 are eliminated, and the force acting on the eaves body 2 from above is dispersed to the adjacent eaves body 2 via the eaves flange 243. In addition, by providing a sealing material 244 made of sponge or the like on the underside of the eaves flange 243, gaps between the front surface of the eaves flange 243 and the eaves body 2 are eliminated, improving the soundproofing performance of the soundproof wall. The sound absorber fixing material 24 and the eaves flange 243 are made of FRP or GFRP, just like the FRP wall material 3 and the eaves panel 21.

[0024] <5.4> Eaves fixing material The eaves fixing member 25 protrudes from the underside of the eaves panel 21 and is connected to the rib 7 of the wall body 1 (FIG. 2). The eaves fixing material 25 fixes a square cylindrical fixing pipe 251 to the underside of the eaves panel 21, and fixes fixing panels 252 that are L-shaped in plan view to both sides of the fixing pipe 251 (FIG. 6). Bolt insertion holes 253 are arranged on the fixing surface of the fixing panel 252 with the fixing pipe 251 in accordance with the inclination angle of the eave body 2. Spacers 713 having insertion holes 713a aligned with the eave fixing holes 712 are placed on the rib 7 at the positions of the eave fixing holes 712 to match the spacing between the opposing fixing panels 252 (FIG. 8). The rib 7 and spacer 713 are then placed between the opposing fixing panels 252 and fixed with bolts 255 and nuts 256 that pass through the bolt insertion holes 253, the insertion holes 713a and the eaves fixing holes 712.

[0025] <6> Mounting bracket The mounting bracket 9 is U-shaped in plan view and has a base fixing portion 92 that is fixed to the upper end of the structure C via an anchor bolt 91, and a fixing piece 93 that stands on the upper surface of the base fixing portion 92 (Figure 9). The fixing piece 93 has an insertion hole 931 aligned with the metal fitting fixing hole 711 of the rib 7 and abuts against one side surface of the rib 7 . Furthermore, a splice plate 94 having substantially the same shape as the fixing piece 93 is abutted against the other surface of the rib 7. The splice plate 94 has an insertion hole 941 that matches the metal fitting fixing hole 711 of the rib 7, and is fixed with a bolt 932 and a nut 933 that pass through the insertion hole 941 of the splice plate 94, the metal fitting fixing hole 711 of the rib 7, and the insertion hole 931 of the fixing piece 93, thereby erecting the wall body 1 on the structure C. Note that the method for erecting the wall body 1 is not limited to this method. A restraining portion 95 may be provided on the upper surface of the base fixing portion 92 to protrude and be positioned in front of the wall sound absorber 4 of the wall body 1 .

[0026] The FRP and GRP that make up the soundproof wall, the wall sound absorber 4, the upper sound absorber 22, and the lower sound absorber 23 are all lightweight, which makes the soundproof wall lightweight as well. Therefore, when replacing an existing wall, the lightweight soundproof wall of the present invention can be used even in cases where a conventional concrete soundproof wall would be difficult to use because of the heavy weight that places a heavy load on the underlying structure C. [Explanation of symbols]

[0027] 1 wall 2. Eaves 21 eaves panel, 211 board body, 212 sound absorbing body suppression part 22 Top sound absorber 23 Bottom sound absorber 24 Sound absorber fixing material, 241 Bolt, 242 Nut, 243 Eaves flange, 244 Sealing material 25 Eaves fixing material, 251 fixing pipe, 252 fixing panel, 253 bolt insertion hole, 254 retaining part, 255 bolt, 256 nut 3 FRP wall material, 31 top cover 4. Wall sound absorbers 5 Vertical Panels 6 side wall, 61 retaining portion 7 rib, 71 first rib, 711 metal fitting fixing hole, 712 eaves fixing hole, 713 spacer, 713a insertion hole, 72 second rib, 73 retaining portion 8 wall flange, 81 sealant 9 Mounting bracket, 91 Anchor bolt, 92 Base fixing part, 93 Fixing piece, 931 Insertion hole, 932 Bolt, 933 Nut, 94 Splice plate, 941 Insertion hole, 95 Retaining part C structure

Claims

1. A wall body and a canopy body provided on the upper front surface of the wall body, The wall body has an FRP wall material that is rectangular in plan view and a wall sound absorbing body that is placed on a surface of the FRP wall material, The FRP wall material has a flat vertical panel, side walls protruding forward in the height direction on both sides of the vertical panel, and a T-shaped rib protruding forward in the up-down direction on the front surface of the vertical panel, The eaves body has an eaves panel that is rectangular in plan view, an upper surface sound absorber arranged on the upper surface of the eaves panel, a lower surface sound absorber arranged on the lower surface of the eaves panel, sound absorber fixing materials arranged on both side surfaces of the eaves panel, and an eaves fixing material that protrudes from the lower surface of the eaves panel, The eaves panel has a flat plate body, and a sound absorbing body suppressing portion in which the upper and lower ends of the plate body are T-shaped and the tip of the T is folded back parallel to the plate body, The eaves fixing material is fixed to the rib of the FRP wall material, and the eaves body is arranged to protrude from the upper front surface of the wall body and incline upward, the sound absorber, the upper sound absorber, and the lower sound absorber are substantially rectangular plate-like bodies, The wall sound absorber is disposed between the side wall and the rib of the FRP wall material and between the parallel ribs, The upper surface sound absorber and the lower surface sound absorber are supported on their upper and lower sides by the sound absorber support parts at the upper and lower ends of the eaves panel, and are supported on their peripheries by the sound absorber fixing materials on both sides of the eaves panel. Soundproof wall.

2. The soundproof wall according to claim 1, The vertical panel has a wall flange projecting from the rear surface of the side edge of the vertical panel in parallel with the vertical panel. Soundproof wall.

3. The soundproof wall according to claim 2, The sound absorber fixing member has an eave flange that projects parallel to the eave panel from the upper surface of the sound absorber fixing member. Soundproof wall.

4. The soundproof wall according to any one of claims 1 to 3, The rib includes a first rib located below and a second rib located above the first rib, a protruding length of the first rib from the vertical panel is longer than a protruding length of the side wall from the vertical panel; a protruding length of the second rib from the vertical panel is substantially the same as a protruding length of the side wall from the vertical panel; The eave fixing material of the eave body is fixed to the upper part of the first rib, Soundproof wall.

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