Soundproof wall

Abstract

To provide a soundproof wall capable of being installed on a support without lifting a member to the upper part of the support by making the member at the time of construction have a weight capable of being constructed by manpower, and having excellent workability even in a narrow working space because of the small size of the member.SOLUTION: A soundproof wall is provided with a plurality of supports 2,.., 2 erected at a predetermined interval, a rear surface member 50 fixed to at least the support 2, and a front surface member 51 projecting from the rear surface member 50 toward a noise source side, and an extension member 56 front-fixed to a front flange of the support 2 from the noise source side is provided on both right and left sides of the rear surface member 50.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a sound insulation wall, and more particularly to a sound insulation wall having a branched top that reduces noise through multiple diffraction and interference with the shape of the top.

Background Art

[0002] Sound insulation walls are installed along roads such as highways and along tracks such as railways for the purpose of suppressing the propagation of noise from noise sources. In such sound insulation walls, it is required to be able to reduce noise without increasing the height. In recent years, a branched sound insulation wall having a branched top that improves the top of the sound insulation wall to reduce direct sound, diffracted sound, and reflected sound from the noise source has been proposed.

[0003] For example, Patent Document 1 discloses a top structure of a sound insulation wall including a sound insulation panel attached between columns and extending in the vertical direction, and a branched panel extending obliquely upward from the sound insulation panel toward the noise source side, and a detachable sound absorption member is attached to the lower surface side of the branched panel (see Claim 1 of the claims of Patent Document 1, paragraphs

[0030] to

[0054] of the specification, FIGS. 2, 5 to 7 of the drawings, etc.).

[0004] The top structure of the sound insulation wall described in Patent Document 1 can be expected to have a sound reduction effect by double diffraction and interference due to the sound insulation panel and the branched panel. Therefore, it has excellent noise reduction effect without increasing the wall height, and has advantages such as good maintainability and no risk of crossing the adjacent land boundary.

[0005] However, in the case of elevated road and railway bridges, if there is no space to place heavy machinery such as cranes on or below the bridge, or if heavy machinery cannot be used, such as during railway operations, construction must be done manually. For example, in the case of panels with a 3m spacing between support columns, which are commonly used in railways, even excluding the removable sound-absorbing members, the weight exceeds what can be handled manually, making manual construction difficult and causing problems. Furthermore, considering application in snowy regions, it is necessary to be able to withstand snow loads, requiring reinforcement of both the sound insulation panel and the branching panel. Therefore, members are also needed to firmly connect the sound insulation panel and the branching panel, further increasing the weight.

[0006] Furthermore, due to noise regulations, sound barriers are often made 2 meters or taller, which means the height of the support columns also exceeds 2 meters. The top structure of the sound barrier described in Patent Document 1 is constructed by dropping it into the flange of the H-shaped steel support column, which requires lifting the top of the sound barrier above the support column. However, as mentioned above, there was also the problem that it was impossible to manually lift the top of a sound barrier, which is too heavy to construct by hand, above a support column that is more than 2 meters tall.

[0007] In addition, the top structure of the soundproof wall described in Patent Document 1 has an integrated sound insulation panel and branching panel, and is larger in thickness than a normal straight wall panel. For this reason, when installing it for railway use, it was difficult to transport the top section of the soundproof wall within the limited construction space between the track and the railing. In other words, when manually moving the integrated sound insulation panel and branching panel horizontally to the predetermined position and then moving it vertically to the top of the support column to lift it, the large dimensions of the panel made it difficult to work with, as it would come into contact with ancillary structures such as power lines and pipes on the track side of the railing, or hit temporary track protection fences. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2021-161610 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the present invention was devised in view of the aforementioned problems, and its objective is to provide a soundproof wall in which the components are light enough to be installed manually, can be installed on the support column without lifting the components to the top of the column, and has good workability even in narrow workspaces due to the small dimensions of the components. [Means for solving the problem]

[0011] The 1 The soundproof wall according to the invention is The structure comprises a plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, wherein extension members are provided on both the left and right sides of the rear member, fixed to the front flange of the support column from the noise source side. The rear member is provided with an attachment member for attaching and joining the front member, and the attachment member is, The cross-section of the member is U-shaped. Before fixing the front member to the rear member , a mounting member with a U-shaped cross-section is placed over the rear member. Place it on top The purpose of supporting the weight of the aforementioned front member is It is characterized by being configured in such a way.

[0012] The 2 The soundproof wall according to the invention is The structure comprises a plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, wherein extension members are provided on both the left and right sides of the rear member, fixed to the front flange of the support column from the noise source side. A receiving member that extends the rear flange of the support column in the direction between the support columns is attached to the support column.

[0013] The 3 The soundproof wall according to the invention is The structure comprises a plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, wherein extension members are provided on both the left and right sides of the rear member, fixed to the front flange of the support column from the noise source side. The mounting member further comprises an intermediate member connecting the rear member and the front member, and attaches and joins the front member to the rear member, The intermediate member is fixed to the rear member. First mounting member and The front member is fixed to the intermediate member. It consists of a second mounting member, and the first mounting member is The cross-section of the member is U-shaped. Before fixing the intermediate member to the rear member The first mounting member, which has a U-shaped cross-section, is placed over the rear member. Place it on top The intermediate member supports its own weight. The second mounting member is configured to allow the following: It has a hanging hook, Before fixing the front member to the intermediate member The front member is attached to the intermediate member with the fastening hook to support the weight of the front member. It is characterized by being configured in such a way.

[0014] The 4 The soundproof wall according to the invention is, 3In the invention, the intermediate member is a bracket that protrudes from the rear member toward the noise source side, a plurality of the brackets are arranged at intervals in the direction between the columns, and the plurality of brackets are connected at the upper part by a cross member along the direction between the columns.

[0015] No. 5 The sound insulation wall according to the invention is No. 2 In the invention, a sound absorption member is attached to the front member.

[0016] No. 6 The sound insulation wall according to the invention is No. 2 In the invention, a sound absorption member is attached to the rear member.

[0017] No. 7 The sound insulation wall according to the invention is No. 5 In the invention, a protrusion protruding toward the noise source side is provided on the front member, and the sound absorption member is attached to the protrusion.

[0018] No. 8 The sound insulation wall according to the invention is No. 7 In the invention, the protrusion is formed by combining L-shaped members having an L-shaped cross section.

Effect of the Invention

[0019] According to the first invention to the No. 8 According to the invention, by dividing the branched top structure of the sound insulation wall into a rear member and a front member, the weight of each member can be reduced, and manual construction becomes possible. In addition, the thickness of each member and the dimension in the thickness direction of the sound insulation wall can also be reduced, and construction in a limited narrow space becomes easy. Also, according to the first invention to the No. 8 According to the invention, by providing extension members at both ends of the rear member, it is possible to prevent the front of the column from the noise source side, so there is no need to lift the sound insulation wall above the H-shaped steel column and drop it into the column flange as in the prior art. When manually constructing, workability and safety are improved.

[0020] Also , the 1 According to the invention, by making the mounting member a temporary support structure capable of holding the weight of the front member, when fixing the front member to the rear member, it is no longer necessary to manually hold the front member in a lifted position after lifting it to a predetermined position until it is fixed, thereby greatly reducing the workload.

[0021] Also , the 2 According to the invention, when fixing the rear member to the support column, the risk of the rear member falling below the elevated bridge is reduced, thereby improving safety. Furthermore, since the rear member can be fixed to the support column while in contact with the receiving member, the structural stability and sound insulation are improved.

[0022] Also , the 3 According to the invention, by dividing the top structure into a rear member, an intermediate member, and a front member, the weight of each member can be reduced, making manual installation easier. Furthermore, the thickness of each member can be reduced, making installation easier even in limited, confined spaces.

[0023] In particular, 4 According to the invention, by constructing the intermediate member with multiple brackets, the weight of the intermediate member itself can be reduced, and by connecting and integrating the multiple brackets with a horizontal member, the ease of attachment to the rear member is improved.

[0024] In particular, 5 According to the invention, noise can be effectively reduced by attaching a sound-absorbing member to the front member that is the noise source.

[0025] In particular, 6 According to the invention, by installing a sound-absorbing member on the rear member of the top sound barrier, it becomes possible to efficiently reduce noise that wraps around the top and propagates to the surrounding area using the sound-absorbing member.

[0026] In particular, 7According to the invention, sound absorption performance can be further improved by providing sound-absorbing protrusions on the front member.

[0027] In particular, 8 According to the invention, by dividing the protrusion into two L-shaped members, the weight of the front member can be reduced, further improving the work efficiency of manual installation. [Brief explanation of the drawing]

[0028] [Figure 1] Figure 1 is a perspective view showing a soundproof wall according to an embodiment of the present invention. [Figure 2] Figure 2 is an exploded perspective view showing the configuration of the soundproof wall described above. [Figure 3] Figure 3 is a front view showing the sound barrier as seen from the noise source side. [Figure 4] Figure 4 is a right side view of Figure 3, showing the soundproof wall mentioned above. [Figure 5] Figure 5 is an assembled perspective view showing the top structure of the soundproof wall described above. [Figure 6] Figure 6 is an exploded perspective view showing the configuration of the top structure of the same as above. [Figure 7] Figure 7 is a perspective view showing the rear member of the top structure shown above. [Figure 8] Figure 8 is a plan view showing the top structure's support member attached to the support column, where (a) shows the case where a wedge nut is welded, and (b) shows the case where a locking clip K nut is attached. [Figure 9] Figure 9 is a plan view showing a modified support member in which the width of the rear flange of the support column is wider on both sides than the width of the front flange, with (a) showing the case where a wedge nut is welded and (b) showing the case where a locking clip K nut is attached. [Figure 10] Figure 10 is a perspective view showing the upper sound-absorbing panel of the top structure shown above, where (a) is a front perspective view as seen from the noise source and (b) is a rear perspective view thereof. [Figure 11]Figure 11 is a perspective view showing the lower sound-absorbing panel of the top structure shown above, where (a) is a front perspective view as seen from the noise source and (b) is a rear perspective view thereof. [Figure 12] Figure 12 is a perspective view mainly showing the connecting body of the intermediate members of the top structure shown above. [Figure 13] Figure 13 is an exploded perspective view showing the configuration of the top structure according to the second embodiment of the present invention. [Figure 14] Figure 14 is a perspective view showing the rear member of the top structure shown above. [Figure 15] Figure 15 is a rear perspective view showing a modified example of the rear member shown above. [Figure 16] Figure 16 is a perspective view mainly showing the connecting body of the intermediate members of the top structure shown above. [Modes for carrying out the invention]

[0029] Hereinafter, soundproof walls and soundproof walls according to embodiments of the present invention will be described in detail with reference to the drawings.

[0030] [Soundproof wall] First, the soundproof wall 1 according to an embodiment of the present invention will be described using Figures 1 to 4. Figure 1 is a perspective view showing the soundproof wall 1 according to an embodiment of the present invention, and Figure 2 is an exploded perspective view showing the configuration of the soundproof wall 1. Figure 3 is a front view showing the soundproof wall 1 as seen from the noise source side, and Figure 4 is a right side view of the soundproof wall 1 shown in Figure 3.

[0031] The soundproof wall 1 according to an embodiment of the present invention is a soundproof wall installed in parallel along an area that is a source of noise, such as roads, railways, outdoor units, factories, and other facilities, and is a soundproof wall equipped with a branched top structure that reduces noise by interfering direct sound from the noise source with diffracted and reflected sound.

[0032] As shown in Figures 1 and 2, the soundproof wall 1 according to this embodiment consists of a plurality of H-shaped steel columns 2, 2 erected at predetermined intervals (for example, 2m, 3m, or 4m) on a structure such as a concrete structure, a plurality of sound insulation panels 3 inserted between these columns 2, 2, a plurality of sound absorption panels 4 inserted between the columns 2, 2 above the sound insulation panels 3, and a branched top structure 5, described later, provided on the upper part of the soundproof wall 1.

[0033] <Strut> The support column 2 is mainly made of H-shaped steel with a predetermined flange width (for example, about 100 mm to 175 mm) that has been treated with rust prevention treatment such as hot-dip galvanizing, and a base plate 20 is welded to the lower end, and it is erected on concrete structures such as the curb of a bridge or foundation concrete. In addition, multiple reinforcing ribs are formed at the joint between the H-shaped steel and the base plate 20 for reinforcement. Of course, the support column according to the present invention can have the sound insulation panel 3 and sound absorption panel 4 described later inserted between them, and can be replaced with support columns made of other steel materials or other materials such as square pipes, channel steel, or I-beams, as long as they can withstand the wind pressure etc. that is expected to be used as a sound barrier.

[0034] <Soundproofing panel> The sound insulation panel 3 is a concrete-based precast panel that has the function of reducing noise transmitted through the sound barrier wall 1 by suppressing vibrations according to the law of gravity.

[0035] This soundproofing panel 3 is inserted between the two support columns 2 and bolted to the front flange of the support column 2. Of course, it is not limited to bolt fixing; it can be mechanically fixed to the support column 2 by any means, such as inserting a leaf spring.

[0036] Furthermore, as shown in Figure 2, in the illustrated configuration, two layers of sound-insulating panels 3 are installed. However, the number of layers of sound-insulating panels 3 can be appropriately determined according to the condition and purpose of the sound barrier wall 1, and it is also acceptable to install sound-absorbing panels 4 without installing any layers of sound-insulating panels 3. In addition, it is not necessary to fasten the sound-insulating panels 3 in front.

[0037] <Sound-absorbing panel> The sound-absorbing panel 4 is a typical sound-absorbing panel that comprises a rectangular box-shaped metal casing made of metal plates, with sound-absorbing material inserted on the front side (noise source side) of the metal casing and an air layer formed on the back side (opposite side away from the noise source).

[0038] As shown in Figures 1 and 2, the sound-absorbing panels 4 are installed in multiple layers, four layers in the illustrated configuration. Furthermore, a receiving member 53, described later, is installed between the sound-absorbing panels 4 and the support columns 2, and wedge nuts WN and locking clips K nuts KN are installed at positions corresponding to the bolt holes in the support columns 2.

[0039] Therefore, the sound-absorbing panel 4 can be easily bolted to the front of the sound barrier wall 1, reducing the risk of accidentally dropping the sound-absorbing panel 4, which is positioned higher than the worker's waist, outside the boundary or over the elevated bridge. Furthermore, since the sound-absorbing panel 4 can be bolted to the front flange of the support column 2, which is the noise source side, and installed without any gaps, this method reliably prevents sound leakage through gaps, compared to conventional methods where gaps may occur between the support column and the panel, or where the sound-absorbing panel is dropped between the flanges of the support column and fixed with leaf springs, etc., thus offering advantages from the standpoint of sound leakage prevention.

[0040] (Metal casing) This metal enclosure is made of metal plates such as highly weather-resistant plated steel plates or aluminum plates. Furthermore, as shown in Figures 1, 2, and 3, the front panel of the metal enclosure is a perforated metal type sound-absorbing panel made of aluminum plate with numerous through-holes. Direct noise is transmitted through the numerous through-holes and absorbed by the sound-absorbing material. Of course, the metal enclosure according to the present invention is not limited to the perforated metal type, but may also be a louver type with louver-shaped openings.

[0041] (Sound-absorbing material) Sound-absorbing materials consist of fibrous materials such as glass wool or polyester fibers, or porous materials such as foamed resin, and have the function of reducing noise by diffusely reflecting and attenuating it. Of course, the sound-absorbing material according to the present invention is not particularly limited as long as it is a material that can absorb noise by diffusely reflecting and attenuating it, and has predetermined water repellency and flame retardancy so that it can be inserted into a soundproof wall.

[0042] Of course, the sound-absorbing panel according to the present invention is not limited to porous sound-absorbing panels with sound-absorbing material inserted. For example, the sound-absorbing panel according to the present invention can be any other known sound-absorbing panel, such as a plate (membrane) vibration type sound-absorbing panel that absorbs sound by vibrating a plate or membrane and consuming a portion of the sound energy through internal friction, or a resonator type sound-absorbing panel equipped with a resonator with holes in a cavity, in which the air in the area of ​​the holes vibrates violently near the resonant frequency and absorbs sound by consuming it as frictional heat with the surroundings.

[0043] <Top structure> [First Embodiment] Next, the top structure 5 of the soundproof wall 1 according to the first embodiment of the present invention will be described in detail with reference to Figures 5 to 12. Figure 5 is an assembled perspective view showing the top structure 5 according to this embodiment, and Figure 6 is an exploded perspective view showing the configuration of the top structure 5 according to this embodiment. As shown in Figures 5 and 6, the top structure 5 according to the embodiment of the present invention comprises, in a vertical cross-section, two upper and lower rear members 50, 50 extending in the vertical direction, front members 51, 51 projecting diagonally upward from the rear members 50 toward the noise source, and a plurality of right-angled triangular intermediate members 52 connecting the rear members 50 and the front members 51.

[0044] (rear part) As shown in Figure 7, the rear member 50 is a rectangular panel material in front view, made of a metal plate such as a highly weather-resistant plated steel sheet or an aluminum sheet, and has the function of suppressing vibrations by gravity and reducing transmitted noise. Figure 7 is a perspective view showing the rear member 50 according to this embodiment.

[0045] Furthermore, as shown in Figure 7, Z-shaped extension members 56 are attached to both the left and right sides of the rear member 50 that face the support column 2. This allows the rear member 50 to be easily fixed to the front flange of the support column 2 from the noise source side, resulting in good workability even in limited, confined spaces such as railway viaducts. It also prevents the rear member 50 from accidentally falling to the back side of the rear flange of the support column 2 (outside the bridge or boundary).

[0046] As shown in Figure 7, the bolt holes for bolting the extension member 56 to the front flange of the support column 2 are elongated holes 56a. Therefore, construction errors such as the verticality of the support column 2 can be absorbed by the elongated holes 56a.

[0047] (Support member) Furthermore, as shown in Figure 2, the rear member 50 is interposed between the support column 2 and a receiving member 53 which has a U-shaped cross-section to receive and support the rear member 50, and is fixed to the front flange of the support column 2 on the noise source side with bolts (see also Figure 8). As shown in Figure 2, the length of the receiving member 53 is such that it reaches from the upper end of the sound insulation panel 3 to the upper end of the rear member 50, and the sound absorbing panel 4 is also fixed to the front flange of the support column 2 by interposing this receiving member 53 between it and the support column 2.

[0048] Figure 8 is a plan view showing the receiving member 53 according to this embodiment attached to the support column 2, where (a) shows the case when a wedge nut is welded and (b) shows the case when a locking clip K nut is attached. Figure 9 is a plan view showing a modified example of the receiving member in which the width of the rear flange of the support column 2 is wider on both sides than the width of the front flange, where (a) shows the case when a wedge nut is welded and (b) shows the case when a locking clip K nut is attached.

[0049] As shown in Figure 8(a), the receiving member 53 is a U-shaped member made of thin steel plate with one side wider than the other. It is installed so that the wider side is on the side that abuts against the rear flange of the support column 2, which is on the rear side (back side) of the sound barrier 1 (opposite side from the noise source). This is to prevent the sound-absorbing panels 4 and other panels from accidentally falling off the bridge or boundary when they are inserted between the front and rear flanges of the support column 2.

[0050] Furthermore, as shown in Figure 8(a), a wedge nut WN is welded to this receiving member 53. The position where this wedge nut WN is welded corresponds to the position of the bolt hole of the support column 2 shown in Figure 2, etc., and each panel can be easily bolted to the front (front) side (noise source side) of the sound barrier 1. Here, "front fastening" refers to fastening each member (in this case, the receiving member 53) to the support column 2 by bolting from the front side of the front flange of the support column 2. Of course, as mentioned above, front fastening is not limited to bolt connections; it is acceptable as long as it can be mechanically fixed to the support column 2 by some means from the front side of the front flange of the support column 2.

[0051] Furthermore, instead of welding the wedge nut WN to the receiving member 53 in advance, a locking clip K nut KN can be clipped to the receiving member 53, as shown in Figure 8(b). This saves the effort of welding.

[0052] As shown in Figure 9(a), by making the width of the rear flange of the support column 2 wider on both sides than the width of the front flange, it is possible to omit the work of installing the support member 53. In that case, the plate with the wedge nut WN welded to it is either welded on-site or welded to the support column 2 in advance.

[0053] Alternatively, as shown in Figure 9(b), instead of welding the wedge nut WN to the support column 2, a locking clip K nut KN may be clipped to the support column 2.

[0054] (Front component) The front member 51 is a rectangular panel material made of metal plate, and has the function of suppressing vibrations by gravity and reducing transmitted noise. In this embodiment, as shown in Figures 4 and 5, the front member 51 is provided with multiple right-angled triangular intermediate members 52 interposed between it and the rear member 50, so as to intersect the rear member 50 at a predetermined angle and protrude diagonally upward toward the noise source.

[0055] As shown in Figures 4 and 5, the front member 51 according to this embodiment is a pair of upper and lower L-shaped members with L-shaped cross-sections to which sound-absorbing panels 54a and 54b are attached. These sound-absorbing panels 54, 54 form projections 55 that branch out from the lower surface of the front member 51 toward the noise source.

[0056] Except for having an L-shaped cross-section, this sound-absorbing panel 54 is similar to the sound-absorbing panel 4 described above, in that the aforementioned sound-absorbing material is inserted into a metal housing made of a metal plate such as a highly weather-resistant plated steel sheet or an aluminum sheet.

[0057] In this way, by dividing the projection 55 into a pair of L-shaped sound-absorbing panels 54, 54, the weight of the front member 51 and the individual sound-absorbing panels 54 can be reduced, making manual installation easier. Furthermore, by providing projections 55 that branch off from the front member 51, the number of points of diffraction and interference can be increased, and sound absorption can be improved by providing sound-absorbing material at the point where the noise first reaches.

[0058] Furthermore, the sound-absorbing panel 54 according to this embodiment consists of an upper sound-absorbing panel 54a shown in Figure 10 and a lower sound-absorbing panel 54b shown in Figure 11, and each is fitted with a mounting member for joining and attaching to an intermediate member 52, which will be described later. Figure 10 is a perspective view showing the upper sound-absorbing panel 54a according to an embodiment of the present invention, where (a) is a front perspective view as seen from the noise source and (b) is a rear perspective view thereof. Figure 11 is a perspective view showing the lower sound-absorbing panel 54b according to an embodiment of the present invention, where (a) is a front perspective view as seen from the noise source and (b) is a rear perspective view thereof.

[0059] As shown in Figure 10, the upper sound-absorbing panel 54a has an upper fastening hook 60 attached to the top of the panel material, which has an L-shaped cross-section, and is fastened to the tip connecting member 58 of the intermediate member 52, which will be described later. This tip connecting member 58 and the upper fastening hook 60 function as a second mounting member for attaching the sound-absorbing panel 54, which is the front member 51, to the intermediate member 52.

[0060] In other words, the second mounting member, the tip connecting member 58, and the upper hook 60 are structured so that the upper hook 60 can be attached to the tip connecting member 58 to temporarily support the weight of the upper sound-absorbing panel 54a until the upper sound-absorbing panel 54a, which is the front member 51, is attached to the intermediate member 52 by bolting them together. By making the mounting member structured in such a way that it can hold the weight of the upper sound-absorbing panel 54a, which is the front member 51, it is no longer necessary to hold the upper sound-absorbing panel 54a in a lifted position by hand after it has been lifted to the predetermined position and until it is fixed in place, thus greatly reducing the workload.

[0061] Furthermore, as shown in Figure 11, the lower sound-absorbing panel 54b has a lower fastening hook 61 attached to the upper part of the L-shaped panel material, which is fastened to the side fastening bracket 59 of the intermediate member 52, described later. This side fastening bracket 59 and lower fastening hook 61 function as a second mounting member for attaching the sound-absorbing panel 54, which is the front member 51, to the intermediate member 52.

[0062] In other words, similar to the tip connecting member 58 and the upper fastening hook 60, the second mounting member, the side fastening bracket 59 and the lower fastening hook 61, are structured so that the lower fastening hook 61 can be attached to the side fastening bracket 59 to temporarily support the weight of the lower sound-absorbing panel 54b until the front member 51, the lower sound-absorbing panel 54b, is attached to the intermediate member 52 by bolting them together. By making the mounting member structured in such a way that it can hold the weight of the front member 51, the lower sound-absorbing panel 54b, it is no longer necessary to hold the lower sound-absorbing panel 54b in a lifted position by hand after it has been lifted to the predetermined position and until it is fixed in place, thus greatly reducing the workload.

[0063] (Intermediate member) As shown in Figure 12, the intermediate member 52 is a right-angled triangular bracket member that has the function of connecting the rear member 50 and the front member 51, which is a sound-absorbing panel 54, and joining them together to form a single unit. Figure 12 is a perspective view mainly showing the connecting body of the intermediate member 52 of the top structure 5 according to this embodiment.

[0064] This intermediate member 52 consists of multiple right-angled triangular bracket members (six in the illustrated configuration) attached at predetermined intervals between the support columns 2 in the direction between the support columns (see Figure 1). Of course, the shape of the intermediate member 52 is not limited to a right-angled triangle; it can be any bracket member that protrudes from the rear member 50 toward the noise source, and whose shape allows the front member 51 to be fixed at a predetermined angle relative to the rear member 50 which extends vertically (up and down).

[0065] Furthermore, a horizontal member 57 is attached to connect multiple intermediate members 52 (six in the illustrated configuration) at their base ends on the rear member 50 side, integrating the multiple members into a single unit. When joining each bracket member to the rear member 50, the multiple bracket members are integrated using the horizontal member 57, improving the efficiency of the installation work.

[0066] Furthermore, the horizontal member 57 has a U-shaped cross-section, and by placing it on the upper surface of the rear panel 50 and covering the rear panel 50 with the U-shaped horizontal member 57, it is possible to support the weight of the connected intermediate member 52, which is made up of multiple bracket members. For this reason, in the conventional overhead work of attaching the intermediate member 52 to the rear panel 50, it is no longer necessary to continuously support the heavy connected intermediate member 52 on the top of the support column 2 until the bolt fastening is completed, making it possible to easily and quickly attach the intermediate member 52 to the rear panel 50.

[0067] In this embodiment, a tip connecting member 58 is attached to the tips (ends away from the rear member 50) of a pair of right-angled triangular intermediate members 52, connecting the tips of the intermediate members 52. As described above, this tip connecting member 58 has a structure that allows the upper hook 60 to be attached to temporarily support the weight of the upper sound-absorbing panel 54a, and functions as a second mounting member for attaching the sound-absorbing panel 54 to the intermediate members 52.

[0068] Furthermore, as shown in Figure 12, a side-mount bracket 59 is attached to the side of the intermediate member 52, protruding from the side of the intermediate member 52 in the direction between the support columns. As mentioned above, this side-mount bracket 59 has a structure that allows the lower-mount hook 61 to be attached to temporarily support the weight of the lower sound-absorbing panel 54b, and functions as a second mounting member for attaching the sound-absorbing panel 54 to the intermediate member 52.

[0069] According to the soundproof wall 1 equipped with the top structure 5 of the first embodiment described above, the weight of each member can be reduced by dividing it into a rear member 50, a front member 51, and an intermediate member 52, making manual construction possible. In addition, the thickness of each member and the dimensions in the thickness direction of the soundproof wall 1 can be reduced, making construction easier in limited and narrow spaces such as railway viaducts.

[0070] Furthermore, with the sound barrier 1, by providing extension members 56 at both ends of the rear member 50, it can be fixed to the front flange of the support column 2 from the noise source side. Therefore, as in conventional technology, it is not necessary to lift the sound barrier 1 above the H-shaped steel support column 2 and drop it into the support column flange, improving work efficiency and safety when installed manually.

[0071] Furthermore, with respect to the soundproof wall 1, by making the horizontal member 57, which is the first mounting member, capable of supporting the weight of the intermediate member 52, when attaching the intermediate member 52 to the rear member 50, it is no longer necessary to manually hold the intermediate member 52 in a lifted position after lifting it to the predetermined position and until it is fixed in place, thereby greatly reducing the workload.

[0072] Similarly, with respect to the soundproof wall 1, by making the second mounting members, namely the end connecting member 58, side hook bracket 59, upper hook 60, and lower hook 61, into a temporary support structure capable of holding the weight of the sound-absorbing panel 54, which is the front member 51, when fixing the sound-absorbing panel 54 to the intermediate member 52, it is no longer necessary to manually hold the sound-absorbing panel 54 in a lifted position after lifting it to the predetermined position and before fixing it, thereby greatly reducing the workload.

[0073] Furthermore, with the soundproof wall 1, by providing the receiving member 53, the rear member 50 can be fixed to the support column 2 from the front. Therefore, as in the conventional technology, it is not necessary to lift the top structure 5 of the soundproof wall 1 above the support column 2, which is made of H-shaped steel, and drop it into the support column flange. This makes manual construction easier and improves work efficiency and safety.

[0074] Furthermore, with the soundproof wall 1, the intermediate member 52 can be made lighter by being composed of multiple brackets, and the horizontal member 57 connects and integrates multiple brackets, improving the ease of attachment to the rear member 50.

[0075] Furthermore, with the soundproof wall 1, noise can be effectively reduced by making the front member 51 on the noise source side a sound-absorbing panel 54.

[0076] Furthermore, with respect to the soundproof wall 1, the sound absorption performance can be further improved by providing sound-absorbing protrusions 55 on the sound-absorbing panel 54 as the front member 51.

[0077] Furthermore, with respect to the soundproof wall 1, by dividing the protrusion 55 into two L-shaped members as sound-absorbing panels 54, the weight of the sound-absorbing panels 54 can be reduced, further improving the efficiency of manual installation.

[0078] [Second Embodiment] Next, the top structure 5' according to the second embodiment of the present invention will be described using Figures 13 to 16. Figure 13 is an exploded perspective view showing the configuration of the top structure 5' according to the second embodiment of the present invention.

[0079] As shown in Figure 13, the top structure 5' according to the second embodiment comprises, in a vertical cross-section, a rear member 50' extending in the vertical direction, a front member 51' projecting diagonally upward from the rear member 50' toward the noise source, and a plurality of right-angled triangular intermediate members 52' connecting the rear member 50' and the front member 51'.

[0080] (rear part) As shown in Figure 14, the rear member 50' is a rectangular panel material in front view, made of a metal plate such as a highly weather-resistant plated steel sheet or an aluminum sheet, and has the function of suppressing vibrations by gravity and reducing transmitted noise. Figure 14 is a perspective view showing the rear member 50' according to the second embodiment of the present invention.

[0081] The difference between the rear member 50' according to this embodiment and the aforementioned rear member 50 is that while the aforementioned rear member 50 was divided into upper and lower sections, the rear member 50' is a single rear member 50' with a height equivalent to the two upper and lower sections of the rear member 50.

[0082] Furthermore, as shown in Figure 14, extension members 56', which are Z-shaped in plan view, are attached to both the left and right sides of the rear member 50' that face the support column 2, similar to the rear member 50 described above. As a result, the rear member 50' can be easily fixed to the front flange of the support column 2 from the noise source side, and workability is good even when installing in limited, narrow spaces such as railway viaducts. In addition, it is possible to prevent the rear member 50' from accidentally falling to the back side of the rear flange of the support column 2 (outside the bridge or boundary).

[0083] As shown in Figure 14, the bolt holes for bolting the extension member 56' to the front flange of the support column 2 are elongated holes 56a', similar to those of the extension member 56 described above. Therefore, construction errors such as the verticality of the support column 2 can be absorbed by the elongated holes 56a'.

[0084] Figure 15 is a rear perspective view showing a modified example of the second embodiment of the rear member 50''. As shown in Figure 15, it is preferable that a sound-absorbing panel similar to the sound-absorbing panel 4 described above is attached to the back of the rear member 50'' (the side opposite the noise source). This is because the sound-absorbing panel can reduce noise that wraps around the top of the rear member 50'' and propagates to the surrounding area. Of course, it is also acceptable to provide it on the front side, which is the noise source side, not just the back of the rear member 50''. This is because it can reduce noise that wraps around the top of the front member 51 and propagates.

[0085] (Intermediate member) As shown in Figure 16, the intermediate member 52' ​​consists of multiple right-angled triangular bracket members attached at predetermined intervals in the direction between the support columns 2 (see also Figure 1). Figure 16 shows that, of course, the shape of the intermediate member 52' ​​is not limited to a right-angled triangle, similar to the intermediate member 52 described above. It is a bracket member that protrudes from the rear member 50' toward the noise source, and the front member 51' can be fixed at a predetermined angle to the rear member 50' which extends vertically (up and down).

[0086] Furthermore, a horizontal member 57' is attached to connect multiple intermediate members 52' (four in the illustrated configuration) at their base ends on the rear member 50' side, thereby integrating the multiple members. When joining each bracket member to the rear member 50', the multiple bracket members are integrated using the horizontal member 57', improving the efficiency of the installation work.

[0087] Furthermore, the horizontal member 57' has a U-shaped cross-section, and by placing it on the upper surface of the rear member 50' panel and covering the rear member 50' with the U-shaped horizontal member 57', it is possible to support the weight of the connected intermediate member 52', which is made up of multiple bracket members. For this reason, in the conventional overhead work of attaching the intermediate member 52' ​​to the rear member 50', it is no longer necessary to continuously support the heavy connected intermediate member 52' ​​on the top of the support column 2 until the bolt fastening is completed, making the attachment of the intermediate member 52' ​​to the rear member 50' easy and quick.

[0088] In this embodiment, a tip connecting member 58' is attached to the tip (the end away from the rear member 50') of the right-angled triangular intermediate member 52', connecting the tips of the intermediate members 52' together. While the aforementioned tip connecting member 58 connects the tips of two adjacent intermediate members 52, this tip connecting member 58' connects the tips of all four intermediate members 52' with a single tip connecting member 58'. This tip connecting member 58' has a structure that allows it to temporarily support the weight of the sound-absorbing panel 54' by attaching the upper hook 60' (described later), and functions as a second mounting member for attaching the sound-absorbing panel 54' to the intermediate member 52'.

[0089] Furthermore, as shown in Figure 16, a side-mounted bracket 59' is attached to the side of the intermediate member 52', protruding from the side of the intermediate member 52' ​​in the direction between the support columns. This side-mounted bracket 59' is designed to temporarily support the weight of the sound-absorbing panel 54' by hooking the lower mounting hook (not shown) of the sound-absorbing panel 54', and functions as a second mounting member for attaching the sound-absorbing panel 54' to the intermediate member 52'.

[0090] (Front panel) As shown in Figure 13, the front member 51' according to this embodiment is composed of a flat sound-absorbing panel 54' similar to the sound-absorbing panel 4 described above, and a protruding sound-absorbing panel 55' attached to the center in the height direction. When these sound-absorbing panels 54' and the protruding sound-absorbing panel 55' are joined together, the resulting configuration is similar to that of the front member 51 formed by joining the upper and lower pair of L-shaped sound-absorbing panels 54 described above, with a protrusion 55 that branches out from the lower surface towards the noise source.

[0091] By dividing the sound-absorbing panel into a sound-absorbing panel 54' and a protruding sound-absorbing panel 55', the weight of the front member 51' and the sound-absorbing panel 54' individually can be reduced, making manual installation easier. Furthermore, by providing a protruding sound-absorbing panel 55' that branches off from the sound-absorbing panel 54', which is the front member 51', the number of points of diffraction and interference can be increased, and sound absorption can be improved by providing sound-absorbing material at the point where the noise first reaches.

[0092] As shown in Figure 13, the back of the sound-absorbing panel 54' is fitted with an upper fastening hook 60' located at the top of the panel and a lower fastening hook (not shown) located near the center in the height direction of the panel.

[0093] The upper fastening hook 60' is fastened to the tip connecting member 58' of the aforementioned intermediate member 52', and the lower fastening hook is fastened to the side fastening bracket 59' of the aforementioned intermediate member 52'. The tip connecting member 58' and the upper fastening hook 60', along with the side fastening bracket 59' and the lower fastening hook, function as second mounting members for attaching the sound-absorbing panel 54', which is the front member 51', to the intermediate member 52'.

[0094] In other words, the second mounting members, namely the end connecting member 58' and the upper hook 60', and the side hook bracket 59' and the lower hook, are structured so that the upper hook 60' can be attached to the end connecting member 58' and the lower hook to the side hook bracket 59' to temporarily support the weight of the sound-absorbing panel 54' until the front member 51', the sound-absorbing panel 54', is attached to the intermediate member 52' ​​by bolting them together. By structuring the mounting members in this way so that they can support the weight of the front member 51', the sound-absorbing panel 54', it is no longer necessary to hold the sound-absorbing panel 54' in a lifted position after it has been raised to the predetermined position and before it is fixed in place, thus greatly reducing the workload.

[0095] According to the soundproof wall 1 equipped with the top structure 5' of the second embodiment described above, the weight of each member can be reduced by dividing it into a rear member 50', a front member 51', and an intermediate member 52', making manual construction possible. In addition, the thickness of each member and the dimensions in the thickness direction of the soundproof wall 1 can be reduced, making construction easier in limited and narrow spaces such as railway viaducts.

[0096] Furthermore, with the top structure 5', by providing extension members 56' at both ends of the rear member 50', the sound barrier 1 can be fixed to the front flange of the support column 2 from the noise source side. This eliminates the need to lift the sound barrier 1 above the H-shaped steel support column 2 and drop it into the support column flange, as in conventional technology, improving work efficiency and safety when installed manually.

[0097] Although the soundproof wall 1 according to the first and second embodiments of the present invention has been described in detail above, the embodiments described above or illustrated are merely examples of embodiments that have been materialized in carrying out the present invention. Therefore, the technical scope of the present invention should not be interpreted as being limited by these embodiments.

[0098] In particular, while an example was given in which a sound-insulating panel 3 and a sound-absorbing panel 4 are installed below the top structure of the present invention as a soundproof wall, the soundproof wall according to the present invention may also consist of only one of these sound-insulating panels 3 and sound-absorbing panels 4. This is because it is sufficient for the soundproof wall as a whole to achieve the desired soundproofing effect.

[0099] 1: Soundproof wall 2: Prop 20: Base plate 3: Soundproofing panels 4: Sound-absorbing panels 5,5':Top structure 50,50',50”: Rear part 51,51': Front member 52,52': Intermediate member 53: Receiving member 54: (L-shaped cross-section) sound-absorbing panel (front panel) 54': (Flat) sound-absorbing panel (front panel) 55:Protrusion 55': Protruding sound-absorbing panel 56,56': Extension member 57,57': Horizontal member (First mounting member: Mounting member) 58, 58': End connecting member (Second mounting member: Mounting member) 59,59': Side fastening bracket (second mounting member: mounting member) 60,60': Upper hanging hook (Second mounting member: Mounting member) 61: Lower fastening hook (Second mounting member: Mounting member) WN: Wedge Nut KN: K-nut locking clip

Claims

1. A plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, Extension members are provided on both the left and right sides of the aforementioned rear member, and are fixed to the front flange of the support column from the noise source side. The rear member is provided with an attachment member for attaching and joining the front member, The mounting member has a U-shaped cross-section, and is configured to support the weight of the front member by placing the U-shaped mounting member over the rear member before fixing the front member to the rear member. A soundproof wall characterized by the following features.

2. A plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, Extension members are provided on both the left and right sides of the aforementioned rear member, and are fixed to the front flange of the support column from the noise source side. A receiving member extending the rear flange of the support column in the direction between the support columns is attached to the support column. A soundproof wall characterized by the following features.

3. comprising a plurality of support columns erected at predetermined intervals, a rear member fixed to at least the support columns, and a front member protruding from the rear member toward the noise source, Extension members are provided on both the left and right sides of the aforementioned rear member, and are fixed to the front flange of the support column from the noise source side. The system further includes an intermediate member connecting the rear member and the front member, The mounting member for attaching and joining the front member to the rear member consists of a first mounting member for fixing the intermediate member to the rear member and a second mounting member for fixing the front member to the intermediate member. The first mounting member has a U-shaped cross-section, and is configured to support the weight of the intermediate member by placing the U-shaped first mounting member over the rear member before fixing the intermediate member to the rear member. The second mounting member has a hook, and is configured to allow the front member to be hooked onto the intermediate member with the hook before fixing the front member to the intermediate member, thereby supporting the weight of the front member. A soundproof wall characterized by the following features.

4. The intermediate member is a bracket that protrudes from the rear member toward the noise source, and multiple such brackets are arranged spaced apart in the direction between the support columns. Furthermore, the multiple brackets are connected at their upper ends by horizontal members that run in the direction between the support columns. A soundproof wall according to claim 3, characterized by the following:

5. The aforementioned front panel is fitted with a sound-absorbing material. A soundproof wall according to claim 2, characterized by the above.

6. The aforementioned rear member is fitted with a sound-absorbing material. A soundproof wall according to claim 2, characterized by the above.

7. The front member is provided with a projection that protrudes toward the noise source, and the sound-absorbing member is attached to the projection. A soundproof wall according to claim 5, characterized by the following:

8. The aforementioned protrusion is formed by combining L-shaped members with an L-shaped cross-section. A soundproof wall according to claim 7, characterized by the following:

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