Sound-absorbing wall

Abstract

To provide a sound absorbing wall with excellent workability, economical efficiency, and maintainability, in which a sound absorbing panel and a panel mounting member are installed in a detachable structure, and inspection work of a string-like member (for example, a wire rope) for fall prevention can be rationally and quickly performed in one direction.SOLUTION: A sound absorbing wall is composed of sound absorbing panel units arranged side by side in an extension direction of a road or a railway, and the sound absorbing panel unit is composed of the sound absorbing panel mounted on panel mounting members with bolts from a sound source side, and a string-like member for fall prevention is hung over the sound absorbing panels and the panel mounting members of each of the sound absorbing panel units continuous in the extension direction. The sound absorbing panel unit is configured by bolting one sound absorbing panel to a panel mounting member from the sound source side. The string-like member for fall prevention is hung over a top part of the sound absorbing panel and the panel mounting member.SELECTED DRAWING: Figure 3

Description

[[Technical Field]]

[0001] The present invention belongs to the technical field of sound-absorbing walls installed along the extension direction of roads (expressways) and railways. In this specification, the term "sound-absorbing wall" is used to include sound-insulating walls and sound-proof walls. [[Background Art]]

[0002] For sound-absorbing walls installed along the extension direction of roads and railways, sound-absorbing panels are suitably used to achieve a noise reduction effect by suppressing multiple reflected sounds between vehicle bodies and the wall. The sound-absorbing wall is generally implemented in a structure in which the sound-absorbing panel is attached to a panel mounting member (wall body). However, for the reasons that the sound-absorbing panel (including the internal sound-absorbing material) needs to be replaced periodically due to aging deterioration or damage, and that heavy machinery cannot be used in the construction of viaducts and manual construction may be performed, resulting in a demand for weight reduction at the work site, etc. It is preferable that the sound-absorbing panel has a structure detachable from the panel mounting member (wall body) (see, for example, Patent Documents 1 to 3).

[0003] For example, Patent Document 1 discloses a sound-insulating wall formed of an FRP sound-insulating panel and a mounting portion provided with a fixing through-hole attachable to a building frame, wherein a sound-absorbing panel is detachably installed by bolting on the noise source side of the FRP sound-insulating wall (see the description in Claim 1, etc.).

[0004] Patent Document 2 discloses a sound-insulating wall configured as follows: fall prevention metal fittings are detachably attached to sound-absorbing panels installed between pillars erected at regular intervals by bolting at a ratio of at least one fall prevention metal fitting per sound-absorbing panel, and a fall prevention wire rope is passed through each wire rope through hole so as to sequentially thread through each fall prevention metal fitting arranged to communicate in the vertical and horizontal directions (see the description in Claim 4, etc.).

[0005] Patent Document 3 discloses a panel member installation structure in which a panel member is detachably installed on a T-shaped cross-section support column by bolting, and a fall prevention wire can be attached from the road side after the panel is installed (see description in Claim 5, etc.). [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2011-58252 [Patent Document 2] Japanese Patent Publication No. 2009-108634 [Patent Document 3] Japanese Patent Publication No. 2015-190219 [Overview of the initiative] [Problems that the invention aims to solve]

[0007] Patent Document 1 describes a soundproof wall using sound-absorbing panels, in which the sound-absorbing panels and the FRP sound-insulating wall (panel mounting member) are detachable by bolt fastening. However, no measures have been considered to prevent the sound-absorbing panels from falling if the bolts loosen, leaving unresolved issues. While regularly inspecting all bolts could be considered a measure to prevent them from falling, it would require considerable effort and is not practical for roads or railways where inspection distances are long.

[0008] Patent Document 2, in addition to the detachable configuration, incorporates fall prevention measures using a fall prevention wire rope. However, as shown in Figures 3 to 7, the wire rope and fall prevention fittings are implemented in a configuration that does not expose them to the outside, which presents a new problem: inspection of the wire rope (including inspection of the fall prevention fittings) is not possible.

[0009] In addition to the detachable configuration, Patent Document 3 incorporates fall prevention measures using a fall prevention wire. The fall prevention wire is implemented in a visible configuration exposed to the outside. Therefore, compared to Patent Document 2, workers can easily inspect the wire, and it appears that the problems that arose in Patent Document 2 have been solved. However, while Patent Document 3 allows for confirmation of the wire's installation, the wire is installed not only in the direction of the road's extension but also in the direction of the support pillar's height (up and down). Therefore, for a worker to inspect the wire, it is necessary to continuously perform inspections in both the extension direction and the up and down direction for each support pillar. Consequently, the worker's line of sight is interrupted at each support pillar, hindering proper inspection work, and there are issues that need to be resolved in terms of visual guidance. If wire inspection could be performed in one direction, it would be extremely beneficial, as it would allow workers to perform stress-free, thorough inspections efficiently and quickly.

[0010] Therefore, the present invention was devised in view of the problems of the background technology described above, and its objective is to provide a sound-absorbing wall that is excellent in terms of constructability, economy, and maintainability, not only by implementing a structure in which the sound-absorbing panel and the panel mounting member can be attached and detached, but also by allowing inspection work of the string-like member (e.g., wire rope) for preventing detachment to be carried out rationally and quickly in one direction. [Means for solving the problem]

[0011] As a means to solve the above problems, the sound-absorbing wall according to the invention described in claim 1 is a sound-absorbing wall in which sound-absorbing panel units are arranged in parallel in the direction of the extension of a road or railway, The aforementioned sound-absorbing panel unit is constructed by attaching the sound-absorbing panel to the panel mounting member with bolts from the sound source side. The panel mounting member comprises a raised portion with a concave cross-section capable of receiving the sound-absorbing panel and a base portion that supports the raised portion. The present invention is characterized in that a string-like member for preventing detachment is stretched between each of the sound-absorbing panels and the panel mounting member of the sound-absorbing panel unit, which is continuous in the extension direction.

[0012] The invention described in claim 2 is characterized in that, in the sound-absorbing wall described in claim 1, the sound-absorbing panel unit is constructed by attaching one sound-absorbing panel to a panel mounting member with bolts from the sound source side.

[0013] The invention described in claim 3 is characterized in that, in the sound-absorbing wall described in claim 1 or 2, the string-like member for preventing detachment is stretched across the top of the sound-absorbing panel and the panel mounting member.

[0014] The invention described in claim 4 relates to the sound-absorbing wall described in any one of claims 1 to 3, wherein the upper end of the sound-absorbing panel or The lower end is inserted into a groove formed on the panel mounting member side for positioning, and the device is characterized by having two types of fall prevention means: positioning and preventing the string-like member from falling off. [Effects of the Invention]

[0018] The sound-absorbing wall according to the present invention provides the following effects. (1) Not only can the sound-absorbing panels and panel mounting members be made detachable, but inspection work on the string-like members (e.g., wire ropes) used to prevent detachment can be carried out efficiently and quickly in one direction. Therefore, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. (2) Since the string-like members are stretched in a straight line along the extension direction of the sound-absorbing panels, the fall prevention mechanism can be inspected while maintaining a constant height at the inspection position (line of sight). Therefore, rational, smooth, and stress-free inspection work can be easily performed, resulting in a sound-absorbing wall with excellent maintainability. (3) When sound-absorbing panels are implemented with two types of fall prevention means (two-stage) consisting of a string-like member and a groove, when a sound-absorbing panel attempts to fall, it is rotationally restrained, preventing it from being suspended in mid-air and preventing it from entering the vehicle body, thereby realizing a sound-absorbing wall with superior safety and stability. (4) In railways, cable materials for communication and other purposes may be installed at the upper part or the middle part of a sound-absorbing wall, and the implementation can be carried out with a configuration in which the heights of said cable material and the string-shaped member are made closer to each other. In this case, these inspection operations can also be inspected collectively, so highly reasonable, smooth, stress-free inspection operations can be easily performed, and the maintainability is extremely excellent. (5) For example, inspection can also be performed by remote operation not only by checking the tension of the string-shaped member on site, but also by incorporating a sensor that constantly monitors the tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] [Figure 1] It is a perspective view showing the sound-absorbing panel unit of the sound-insulating wall according to Example 1. [Figure 2] It is a working process diagram for constructing the sound-absorbing panel unit according to Figure 1. [Figure 3] It is a perspective view showing the sound-insulating wall according to Example 1. [Figure 4] It is a perspective view showing the sound-insulating wall according to Example 2. [Figure 5] It is a working process diagram for constructing the sound-absorbing panel unit according to Figure 4. [Figure 6] It is a side view showing the main part of Figure 4. [Figure 7] It is a perspective view showing the sound-insulating wall according to Example 3. [Figure 8] It is a perspective view showing the sound-absorbing panel unit of the sound-insulating wall according to Example 4. [Figure 9] It is a working process diagram for constructing the sound-absorbing panel unit according to Figure 8. [Figure 10] It is a perspective view showing the sound-insulating wall according to Example 4. [Figure 11] It is a perspective view showing the sound-insulating wall according to Example 5. [Figure 12] It is a perspective view showing the sound-insulating wall according to Example 6. [Figure 13] It is a perspective view showing the sound-insulating wall according to Example 6. [Figure 14]This is a perspective view showing a sound-absorbing panel unit for a sound barrier, as an example. [Figure 15] This is a work process diagram for constructing the sound-absorbing panel unit shown in Figure 14. [Figure 16] This is a perspective view showing a sound barrier as an example. [Modes for carrying out the invention]

[0020] Next, an embodiment of the sound-absorbing wall according to the present invention will be described with reference to the drawings. [Examples]

[0021] The sound-absorbing wall according to the present invention, as shown in Figures 1 to 3, is a sound-absorbing wall 10 in which sound-absorbing panel units 1 are arranged in parallel in the extension direction E of a road or railway, and the sound-absorbing panel unit 1 is constructed by attaching sound-absorbing panels 2 to panel mounting members 3 with bolts 4 from the sound source side. A string-like member 5 for preventing detachment is stretched between each of the sound-absorbing panels 2 and the panel mounting members 3 of the sound-absorbing panel unit 1 that are continuous in the extension direction E. Although only two sound-absorbing panel units 1 constituting the sound-absorbing wall 10 are shown for illustrative purposes, in reality, many are continuously arranged in the direction E of the extension of the road or railway. Furthermore, the fixing means 9, such as anchor members, for installing the panel mounting members 3 (sound-absorbing panel units 1) along the roadside, etc. Figure 6 As illustrated in the diagram, it has been omitted in Figures 1 to 3 for illustrative purposes.

[0022] Specifically, in this embodiment, the sound-absorbing panel 2 is constructed by embedding sound-absorbing material such as rock wool or glass wool in a metal exterior member that is formed in a convex shape (hat shape) when viewed from the planar direction. On the other hand, in this embodiment, the panel mounting member 3 is implemented with a structure comprising a raised portion 31 having a concave cross-section that can receive the central convex portion (protruding ridge) of the sound-absorbing panel 2, and a base portion 32 that supports the raised portion 31. Thus, the sound-absorbing panel unit 1 is constructed by fitting the convex portion of the sound-absorbing panel 2 into the concave portion of the panel mounting member 3, aligning the height (top surface) and overlapping them, and screwing bolts 4 into key locations such as the four corners from the sound source side to join them.

[0023] There are two main reasons why the sound-absorbing panel unit 1, consisting of a sound-absorbing panel 2 and a panel mounting member 3, is designed to fit together using a convex and concave joint. First, the sound-absorbing panel unit 1, with the convex joint of the sound-absorbing panel 2 and the concave joint of the panel mounting member 3 fitted together, exhibits a stable rectangular shape when viewed from a planar direction, thereby achieving a robust structure. Second, as will be described later, it enables a structure that allows the anti-detachment string-like member 5 to be smoothly attached to both the sound-absorbing panel 2 and the panel mounting member 3.

[0024] In other words, in this embodiment, string receiving fittings 2a and 3a for inserting the string-like member 5 are integrally provided on the tops of the sound-absorbing panel 2 and the panel mounting member 3, respectively, by joining means such as welding, so that they align in a straight line when fitted together. This realizes a structure in which the string-like member 5 for preventing detachment can be smoothly draped over the sound-absorbing panel 2 and the panel mounting member 3. A rope material such as a wire rope is preferably used for the string-like member 5.

[0025] Furthermore, in this embodiment, grooves (recessed grooves) 6 for receiving the lower end of the sound-absorbing panel 2 are formed on the front surface of the protruding portions at both ends of the rising portion 31 of the panel mounting member 3. Specifically, in this embodiment, a metal member 6 with a Z-shaped cross-section, consisting of a web portion and upper and lower flange portions, is oriented vertically, and the lower flange is joined to the front surface of the protruding portion by joining means such as welding, thereby forming grooves (recessed grooves) 6 between the remaining web portion and upper flange and the front surface of the protruding portion. By implementing this configuration, the sound-absorbing panel 2 attached to the panel mounting member 3 is provided with a fall prevention mechanism at its upper end (top) by a string-like member 5, and at its lower end by a fall prevention mechanism at the groove 6, thereby exhibiting a highly stable structure with two types of fall prevention mechanisms. Note that the member forming the groove 6 is not limited to a metal member 6 with a Z-shaped cross-section, but can be any member capable of forming the groove 6, such as a metal member with an L-shaped cross-section.

[0026] Next, we will explain how to construct the sound-absorbing wall 10 with the above configuration. It should be noted that the method described below is merely one example. First, the panel mounting members 3 are installed in a fixed quantity at predetermined installation locations such as the side of roads or railways or on wall railings, taking into consideration work efficiency, and are lined up in the extension direction E by repeating this process. The installation means for the panel mounting members 3 is to place the base portion 32 at the installation location and install it using fixing means such as anchor members (not shown). Next, the lower end of the sound-absorbing panel 2 is inserted into the groove 6, and the convex portion of the sound-absorbing panel 2 is fitted into the concave portion of the panel mounting member 3, and the two are stacked together, with their heights aligned. Next, the bolt holes provided in the sound-absorbing panel 2 and the screw holes provided in the panel mounting member 3 are aligned (four locations at the four corners in the illustrated example), and bolts 4 are screwed into each hole and fastened together. In this way, a sound-absorbing panel unit 1 is constructed in which the sound-absorbing panel 2 is firmly fixed to the panel mounting member 3. Furthermore, with the above configuration, the string receiving fittings 2a of the sound-absorbing panel 2 and the string receiving fittings 3a of the panel mounting member 3 are aligned in a straight line. Furthermore, the construction work for the sound-absorbing panel unit 1 described above can be completed in advance, before it is delivered to the site. In that case, efficient and rational on-site work can be carried out. Next, a string-like member (for example, a wire rope) is continuously inserted through the linearly aligned string-receiving fittings 2a and 3a in the extension direction E, thereby constructing a sound-absorbing wall 10 in which a string-like member 5 for preventing detachment is stretched over a plurality of parallel sound-absorbing panel units 1 (sound-absorbing panels 2, panel mounting members 3).

[0027] Although the string-like member 5 appears to be stretched taut in a straight line for illustrative purposes, in reality, a certain degree of slack is permissible as long as it serves the purpose of preventing it from falling off. Of course, it is also possible to implement the system by applying tension to the string-like member 5. Furthermore, although not shown in the illustration, the ends of the string-like member 5 are provided with a means to prevent them from coming loose, such as folding the ends back and fastening them with a wire grip to form a loop. Furthermore, although this embodiment uses string receiving fittings 2a and 3a with holes for passing the string-like member 5, it is not limited to this, and for example, an eye bolt (not shown) can be used as a substitute.

[0028] Therefore, with the sound-absorbing wall 10 configured as described above, not only can the sound-absorbing panel 2 and the panel mounting member 3 be attached and detached, but inspection work on the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. Furthermore, with the sound-absorbing wall 10 configured as described above, in addition to the string-like member 5 for preventing detachment, a groove 6 is also formed to prevent detachment. This means that there are two types (two-stage) of detachment prevention measures. Therefore, when the sound-absorbing panel 2 attempts to fall, it is rotationally restrained, preventing it from being suspended in mid-air and preventing it from entering the vehicle body. This results in a sound-absorbing wall 10 that is safer and more stable.

[0029] Incidentally, the sound-absorbing panel unit 1 shown in the illustration is constructed by attaching a single vertically elongated sound-absorbing panel 2, approximately 2 to 3 meters in height, to the panel mounting member 3 with bolts 4 from the sound source side. However, the form (shape, size) of the sound-absorbing panel 2 and the panel mounting member 3 are not limited to the illustration, and can be appropriately modified in design depending on the installation location of the sound-absorbing panel unit 1, the required sound absorption performance, etc. For example, the rising portion 31 of the panel mounting member 3 is implemented as a straight type that stands upright in the vertical direction, but design modifications such as implementing it in a forward-leaning position with the upper half of the rising portion 31 curved or bent toward the vehicle body may be made as appropriate. In this case, the shape of the sound-absorbing panel 2 will also be modified to match the shape of the rising portion 31. [Examples]

[0030] Figures 4 to 6 show examples of sound-absorbing walls 10 with different configurations from the sound-absorbing wall 10 according to Example 1. The configuration of the sound-absorbing wall 10 in this embodiment 2 differs from that of the sound-absorbing wall 10 in embodiment 1 in that the means for forming the groove portion 6 is different (see Figures 3 and 4 for comparison). The other components are the same as in embodiment 1, so the same reference numerals are used and their descriptions are omitted as appropriate.

[0031] In other words, the sound-absorbing wall 10 according to Embodiment 2 is an embodiment in which, in the case of a railway, a cover material (trough cover) 8 is required to house electrical and other cables 13 on the bottom surface, and this cover material 8 is used as the wall material of the groove 6. A cover support member (a metal member with an L-shaped cross-section in the illustrated example) 7 is welded to the front surface of the protruding part of the rising part 31 at a position slightly below the lower end of the sound-absorbing panel 2 to support the cover material 8, thereby forming a groove (recessed groove) between the cover material 8, the metal member 7, and the front surface of the protruding part. Note that the cover material 8 can be newly installed or existing.

[0032] Therefore, according to the sound-absorbing wall 10 of Example 2, not only can the sound-absorbing panel 2 and the panel mounting member 3 be made detachable, similar to Example 1, but the inspection work of the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. Furthermore, in the sound-absorbing wall 10 according to Example 2, in addition to the string-like member 5 for preventing detachment, a groove is also formed to prevent detachment, so to speak, two types (two-stage) of detachment prevention means are implemented. Therefore, when the sound-absorbing panel 2 attempts to fall, it is rotationally restrained by the restraining effect of the cover material 8, preventing it from being suspended in mid-air and preventing it from entering the vehicle body, thus realizing a sound-absorbing wall 10 with superior safety and stability. [Examples]

[0033] Figure 7 shows examples of sound-absorbing walls 10 with different configurations from the sound-absorbing wall 10 according to Example 2. The configuration of the sound-absorbing wall 10 in this embodiment 3 differs from the sound-absorbing wall 10 in embodiment 2 in that it uses a sound-absorbing panel 2 that is slightly lower in height, and a cable material 11, such as one suitable for communication in railways, is installed in the step created between the sound-absorbing panel 2 and the panel mounting member 3 (see Figures 4 and 7 for comparison). The other components are the same as in embodiment 2, so the same reference numerals are used and their descriptions are omitted as appropriate.

[0034] Therefore, according to the sound-absorbing wall 10 of Example 3, just like in Example 2, the sound-absorbing panel 2 and the panel mounting member 3 can be attached and detached, and the inspection work of the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. Furthermore, in the sound-absorbing wall 10 according to Embodiment 3, in addition to the string-like member 5 for preventing detachment, a detachment prevention means is also provided by forming the groove, so to speak, two types (two-stage) detachment prevention means are implemented. Therefore, similar to Embodiment 2, when the sound-absorbing panel 2 attempts to fall, it is rotationally restrained by the restraining effect of the cover material 8, preventing it from being suspended in mid-air and preventing it from entering the vehicle body, thus realizing a sound-absorbing wall 10 with superior safety and stability. Furthermore, with the sound-absorbing wall 10 according to Example 3, the inspection of the string-like member 5 for preventing detachment and the inspection of the cable material 11 can be performed simultaneously at almost the same line of sight. Therefore, a very rational, smooth, and stress-free inspection can be easily performed, resulting in a sound-absorbing wall 10 with excellent maintainability. [Examples]

[0035] Figures 8 to 10 show examples of sound-absorbing walls 10 with different configurations from the sound-absorbing wall 10 according to Example 2. The configuration of the sound-absorbing wall 10 in this embodiment 4 differs from that of the sound-absorbing wall 10 in embodiment 2 in that the string-like member 5 for preventing detachment is stretched across the middle of the sound-absorbing panel 2 (see Figure 4 and Figure 10 for comparison). The other components are the same as in embodiment 2, so they are given the same reference numerals and their descriptions are omitted as appropriate.

[0036] In other words, the sound-absorbing panel 2 according to Embodiment 4 is configured such that, as can be clearly seen in Figure 9, a string receiving fitting 2a is provided protruding from the vehicle body side in the center of the panel, and notches 2b are formed at both ends at the same level to allow the string receiving fitting 3a provided on the panel mounting member 3 side to protrude. Thus, the string-like member 5 for preventing detachment is stretched across approximately the middle of each of the sound-absorbing panels 2 and the panel mounting member 3 of the sound-absorbing panel unit 1 that is continuous in the extension direction E.

[0037] Therefore, according to the sound-absorbing wall 10 of Example 4, just like in Example 2, the sound-absorbing panel 2 and the panel mounting member 3 can be attached and detached, and the inspection work of the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. Furthermore, in the sound-absorbing wall 10 according to Embodiment 4, in addition to the string-like member 5 for preventing detachment, a detachment prevention means is also provided by forming the groove, so to speak, two types (two-stage) detachment prevention means are implemented. Therefore, similar to Embodiment 2, when the sound-absorbing panel 2 attempts to fall, it is rotationally restrained by the restraining effect of the cover material 8, preventing it from being suspended in mid-air and preventing it from entering the vehicle body, thus realizing a sound-absorbing wall 10 with superior safety and stability. [Examples]

[0038] Figure 11 shows an example of a sound-absorbing wall 10 with a different configuration from the sound-absorbing wall 10 according to Example 1. The configuration of the sound-absorbing wall 10 according to Example 5 differs from the sound-absorbing wall 10 according to Example 1 in that the positional relationship between the string-like member 5 for preventing detachment and the groove portion 6 is reversed vertically (see Figure 3 and Figure 11 for comparison). The other components are the same as those in Example 1, so the same reference numerals are used and their descriptions are omitted as appropriate.

[0039] In other words, in Embodiment 5, a metal member 6 with a Z-shaped cross-section, consisting of a web portion and upper and lower flange portions, is oriented vertically, and the upper flange and the panel mounting member 3 are welded together with their heights aligned, thereby forming a downward-opening groove portion (recessed groove portion) 6 between the remaining web portion and lower flange and the front surface of the protruding portion. On the other hand, string receiving fittings 2a and 3a are integrally provided on the lower central part of the sound-absorbing panel 2 and the rising portion 31 of the panel mounting member 3, respectively, by joining means such as welding, so that the centers of the through holes substantially coincide.

[0040] By implementing this configuration, the sound-absorbing panel 2 is inserted into the groove 6 with its upper end slightly tilted, using the same method as when installing a sliding door. The convex portion of the sound-absorbing panel 2 is then fitted into the concave portion of the panel mounting member 3, and the panel is placed on the upper surface of the rising portion 31 while gradually straightening its position. With the panel mounting member 3 and the sound-absorbing panel 2 superimposed, bolts 4 are screwed into the four corners (and other key locations) from the sound source side to join them and construct the sound-absorbing panel unit 1. After that, the string-like members 5 are stretched in a straight line across the string-receiving fittings 2a and 3a, the centers of the through-holes of the multiple sound-absorbing panel units 1 arranged side by side, which are approximately aligned, thereby constructing the sound-absorbing wall 10. In this embodiment, the lower end of the sound-absorbing panel 2 is supported by a string receiving fitting 3a. However, other measures such as providing a protrusion on the panel mounting member 3 to receive and support the lower end of the sound-absorbing panel 2 in addition to the string receiving fitting 3a can be implemented as appropriate.

[0041] Therefore, according to the sound-absorbing wall 10 of Example 5, just like in Example 1, the sound-absorbing panel 2 and the panel mounting member 3 can be attached and detached, and the inspection work of the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. Furthermore, in the sound-absorbing wall 10 according to Example 5, in addition to the string-like member 5 for preventing detachment, a groove 6 is also formed to prevent detachment, so to speak, two types (two-stage) of detachment prevention means are implemented. Therefore, similar to Example 2, when the sound-absorbing panel 2 attempts to fall, it is rotationally restrained by the restraining effect of the cover material 8, preventing it from being suspended in mid-air and preventing it from entering the vehicle body, thus realizing a sound-absorbing wall 10 with superior safety and stability. [Examples]

[0042] Figures 12 and 13 show examples of sound-absorbing wall 10 with different configurations from the sound-absorbing wall 10 according to Example 1. The configuration of the sound-absorbing wall 10 according to Example 6 differs from the sound-absorbing wall 10 according to Example 1 in that it is implemented without the groove portion 6 (see Figure 3 in comparison with Figures 12 and 13). Incidentally, Figures 12 and 13 show variations with different lengths of the sound-absorbing panel 2. The other components are the same as in Example 1, so the same reference numerals are used and their descriptions are omitted as appropriate.

[0043] Therefore, according to the sound-absorbing wall 10 of Example 6, just like in Example 1, the sound-absorbing panel 2 and the panel mounting member 3 can be attached and detached, and the inspection work of the string-like member (e.g., wire rope) 5 for preventing detachment can be performed rationally and quickly in one direction (at a certain height). Thus, a sound-absorbing wall with excellent constructability, economy, and maintainability can be realized. [ Reference example ] [Examples]

[0044] Figures 14-15 show Reference example This indicates that. this Reference example The configuration of the sound-absorbing wall 10 in this embodiment differs from that of the sound-absorbing wall 10 in embodiment 2 in the structure of the panel mounting member 3 (see Figures 4 and 16 for comparison). Accordingly, although not shown in the drawings, the structure of the back side of the sound-absorbing panel 2 has been redesigned to have superior sound absorption. The other components are the same as in embodiment 2, so the same reference numerals are used and their descriptions are omitted as appropriate.

[0045] In other words, Reference exampleInstead of the panel mounting member 3, a C-shaped steel column 12 is used, erected with its web portions facing each other. The string receiving fitting 3a is installed on a plate at the upper end of the column (C-shaped steel) 12. The ends of the sound-absorbing panel 2 are then placed against the flange portion of the column (C-shaped steel) 12, and with the flange portion of the column (C-shaped steel) and the sound-absorbing panel 2 overlapped, bolts 4 are screwed into the four corners (and other key locations) from the sound source side to construct the sound-absorbing panel unit 1. Subsequently, the string-like members 5 are stretched in a straight line across the string-receiving fittings 2a and 3a of the multiple sound-absorbing panel units 1 arranged in a row, thereby constructing the sound-absorbing wall 10. Note that H-shaped steel can be used instead of the C-shaped steel.

[0047] Although embodiments have been described above based on the drawings, it should be noted that the present invention is not limited to the illustrated examples and includes design modifications and variations in application that are commonly performed by those skilled in the art, without departing from the technical idea. [Explanation of symbols]

[0048] 1. Sound-absorbing panel unit 2. Sound-absorbing panels 2a Cord holder 2b Notch 3 Panel mounting components 3a Cord holder 31. Rising section 32 Base section 4 bolts 5. String-like member (wire rope) 6. Groove section (metal component) 7. Lid support member (metal member) 8. Cover component (trough cover) 9. Fixing means (anchor member) 10 Sound-absorbing wall 11 Cable materials 12 Column material (C-shaped steel) 13 Cable materials E Extension direction

Claims

1. A sound-absorbing wall in which sound-absorbing panel units are arranged in parallel in the direction of the extension of a road or railway, The sound-absorbing panel unit is constructed by attaching the sound-absorbing panel to a panel mounting member with bolts from the sound source side, and the panel mounting member comprises a raised portion with a concave cross-section capable of receiving the sound-absorbing panel and a base portion that supports the raised portion. A sound-absorbing wall characterized in that a string-like member for preventing detachment is stretched between each of the sound-absorbing panels and the panel mounting members of the sound-absorbing panel units that are continuous in the extension direction.

2. The sound-absorbing panel unit is characterized in that a single sound-absorbing panel is attached to a panel mounting member with bolts from the sound source side, as described in claim 1.

3. The sound-absorbing wall according to claim 1 or 2, characterized in that the string-like member for preventing detachment is stretched across the top of the sound-absorbing panel and the panel mounting member.

4. The sound-absorbing wall according to any one of claims 1 to 3, characterized in that the upper or lower end of the sound-absorbing panel is inserted into a groove formed on the panel mounting member side to be positioned, thereby providing two types of fall prevention means: positioning and the string-like member.

Images