Wall structure

Abstract

To provide a wall structure capable of preventing deterioration in appearance.SOLUTION: A wall structure according to an embodiment comprises a first plate portion, a top plate portion, a bottom plate portion, a first side plate portion, a second side plate portion, a second plate portion facing the first plate portion and joined to the top plate portion, the bottom plate portion, the first side plate portion, and the second side plate portion, and a plurality of inner ribs arranged in parallel in a predetermined direction between the first plate portion and the second plate portion, each of the plurality of inner ribs is integrally joined to one of the first plate part and the second plate part, but is not joined to the other.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] Soundproof walls are installed along railways, roads, etc. to prevent noise generated when vehicles are running from propagating to the outside. One example of such a soundproof wall is a wall structure made of FRP, as disclosed in Patent Documents 1 and 2. The wall structure has a hollow box structure with a first plate and a second plate arranged opposite each other. When the wall structure is installed as a soundproof wall, the first plate is disposed on the running side of a vehicle or the like (for example, the road side or the railroad side). In this case, the second plate of the wall structure is disposed on the opposite side from the running side. In the wall structures described in Patent Documents 1 and 2, a plurality of inner ribs are disposed between the first plate and the second plate. One end of each inner rib is integrally joined to the first plate, and the other end is integrally joined to the second plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-71071 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-68018 Summary of the Invention [Problem to be solved by the invention]

[0004] When the FRP wall structures described in Patent Documents 1 and 2 are installed as soundproof walls, thermal expansion occurs in the first and second panels due to direct sunlight, ambient temperature, and the like. Because the first and second panels are connected by a plurality of inner ribs, the joints between the inner ribs and the first and second panels are less likely to expand due to thermal expansion, whereas the regions between the adjacent inner ribs of the first and second panels are more likely to expand due to thermal expansion. As a result, waving occurs in the first and second panels. If waving occurs in the second panel located on the opposite side from a road, railroad tracks, or the like, the wavy appearance of the second panel is emphasized when sunlight, etc., hits the second panel, degrading the appearance of the wall structure.

[0005] An object of the present invention is to provide a wall structure that can prevent deterioration of the appearance. [Means for solving the problem]

[0006] A wall structure according to one aspect of the present invention (hereinafter referred to as a "first wall structure") includes a first plate portion having a first side and a second side that face each other in a second direction perpendicular to a first direction, and a third side and a fourth side that connect the first side and the second side and face each other in a third direction perpendicular to the first direction and the second direction, a plate portion connected to the first side, a bottom plate portion connected to the second side, a first side plate portion connected to the third side, and a fourth side plate portion connected to the fourth side. The device comprises two side plate portions, a second plate portion facing the first plate portion in the first direction and connected to the top plate portion, the bottom plate portion, the first side plate portion and the second side plate portion, and a plurality of inner ribs arranged in parallel in a predetermined direction between the first plate portion and the second plate portion, the predetermined direction being the second direction or the third direction, and each of the plurality of inner ribs being integrally joined to one of the first plate portion and the second plate portion but not joined to the other.

[0007] Each of the multiple inner ribs of the first wall structure is integrally joined to one of the first plate portion and the second plate portion, but not to the other. Therefore, the first plate portion and the second plate portion are not connected (or fixed) by each inner rib. Therefore, even if thermal expansion occurs in the first plate portion and the second plate portion due to the influence of direct sunlight, ambient temperature, etc., the first plate portion and the second plate portion are likely to thermally expand uniformly. In this case, waviness is unlikely to occur in the first plate portion and the second plate portion. In other words, the wall structure configured as described above prevents deterioration of the appearance.

[0008] In the first wall structure according to one embodiment, the length of the inner ribs in the first direction may be shorter than the distance between the first plate portion and the second plate portion.

[0009] In one embodiment of the first wall structure, the multiple inner ribs may be integrally joined to the first plate portion but not joined to the second plate portion, and the multiple inner ribs may contact the second plate portion so as to curve the second plate portion in the opposite direction to the first plate portion. In this case, since the second plate portion is curved in the opposite direction to the first plate portion, the second plate portion is likely to expand in the opposite direction to the first plate portion when thermally expanding. Therefore, as described above, even if the multiple inner ribs are in contact with the second plate portion, undulations are unlikely to occur in the second plate portion, and as a result, deterioration in the appearance can be prevented.

[0010] In one embodiment of the first wall structure, the multiple inner ribs include multiple first inner ribs that are integrally joined to the first plate portion but are not joined to the second plate portion, and multiple second inner ribs that are integrally joined to the second plate portion but are not joined to the first plate portion, and the multiple first inner ribs and the multiple second inner ribs do not have to be in contact with each other.

[0011] Another example of a wall structure according to the present invention (hereinafter referred to as the "second wall structure") comprises a first plate portion having a first side and a second side that face each other in a second direction perpendicular to the first direction, and a third side and a fourth side that connect the first side and the second side and face each other in a third direction perpendicular to the first direction and the second direction, a top plate portion connected to the first side, a bottom plate portion connected to the second side, a first side plate portion connected to the third side, a second side plate portion connected to the fourth side, and a second plate portion that faces the first plate portion in the first direction and is connected to the top plate portion, the bottom plate portion, the first side plate portion, and the second side plate portion, and the second plate portion is curved in the opposite direction to the first plate portion.

[0012] The first and second plate portions of the second wall structure are not connected (or fixed) by, for example, multiple inner ribs arranged between them. Therefore, even if thermal expansion occurs in the first and second plate portions due to the effects of direct sunlight, ambient temperature, etc., undulations are unlikely to occur in the first and second plate portions. Furthermore, because the second plate portion is curved in the opposite direction to the first plate portion, even if thermal expansion occurs, the second plate portion is likely to thermally expand in the opposite direction to the first plate portion, making undulations even less likely to occur in the second plate portion. Therefore, deterioration of the appearance is prevented in the second wall structure as well. [Effects of the Invention]

[0013] According to the present invention, a wall structure capable of preventing deterioration of the appearance can be provided. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a wall structure according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is a perspective view showing an example of construction of the wall structure according to the first embodiment. [Figure 5]FIG. 5 is a cross-sectional view of a wall structure according to the first modification. [Figure 6] FIG. 6 is a cross-sectional view of a wall structure according to the second modification. [Figure 7] FIG. 7 is a cross-sectional view of a wall structure according to the third modification. [Figure 8] FIG. 8 is a perspective view of a wall structure according to the second embodiment. [Figure 9] FIG. 9 is a cross-sectional view taken along the line XI-XI shown in FIG. [Figure 10] FIG. 10 is a perspective view of a wall structure according to the third embodiment. [Figure 11] FIG. 11 is a view of the wall structure shown in FIG. 10 as seen from the top panel side. [Figure 12] FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. [Figure 13] FIG. 13 is a perspective view showing another example of a wall structure. [Figure 14] FIG. 14 is a perspective view showing still another example of a wall structure. DETAILED DESCRIPTION OF THE INVENTION

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wall structure will be described in detail below with reference to the drawings as an embodiment of the present invention.

[0016] (First embodiment) Fig. 1 is a perspective view of a wall structure according to a first embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1. In describing the wall structure 1, the X direction (third direction), Y direction (first direction), and Z direction (second direction), which are orthogonal to each other and shown in Figs. 1 to 3, may also be used. The Y direction corresponds to the depth direction of the wall structure 1, the X direction corresponds to the width direction of the wall structure 1, and the Z direction corresponds to the height direction of the wall structure 1.

[0017] The wall structure 1 is used, for example, as a soundproof wall installed on a road, a railroad, or the like on which vehicles travel. The outer shape of the wall structure 1 is a substantially rectangular parallelepiped. The size of the wall structure 1 is set depending on the application. For example, when the wall structure 1 is used as the soundproof wall, the length in the X direction (width direction) is, for example, 500 mm or more and 2000 mm or less, the length in the Y direction (depth direction) is, for example, 30 mm or more and 750 mm or less, and the length in the Z direction (height direction) is, for example, 500 mm or more and 5000 mm or less.

[0018] The wall structure 1 comprises a first plate portion 11, a second plate portion 12, a top plate portion 13, a bottom plate portion 14, a first side plate portion 15, and a second side plate portion 16. In the following description, "upper" indicating a direction means the top plate portion 13 side relative to the bottom plate portion 14, and "lower" means the bottom plate portion 14 side relative to the top plate portion 13.

[0019] The outer surface of the first plate portion 11 forms the front surface of the wall structure 1. The shape of the first plate portion 11 when viewed from the Y direction is rectangular. The first plate portion 11 has a first side 11a, a second side 11b, a third side 11c, and a fourth side 11d. When the wall structure 1 is installed as the above-mentioned soundproof wall, the wall structure 1 is installed so that the first plate portion 11 side faces a road, a railway track, etc. In this case, the outer surface of the first plate portion 11 forms the track surface of the wall structure 1. An example thickness of the first plate portion 11 is 0.25 mm or more and 5 mm or less.

[0020] The first side 11a is the upper side of the first plate portion 11. A top plate portion 13 is integrally formed with the first side 11a. The top plate portion 13 is arranged so that the plate thickness direction of the top plate portion 13 coincides with the Z direction. An example of the thickness of the top plate portion 13 is 0.25 mm or more and 5 mm or less.

[0021] The second side 11b is the bottom side of the first plate portion 11. The second side 11b is located opposite the first side 11a in the Z direction. A bottom plate portion 14 is integrally formed with the second side 11b. The bottom plate portion 14 is arranged so that the plate thickness direction of the bottom plate portion 14 coincides with the Z direction. The bottom plate portion 14 faces the top plate portion 13. An example thickness of the bottom plate portion 14 is 0.25 mm or more and 5 mm or less.

[0022] The third side 11c and the fourth side 11d are side sides connecting the first side 11a and the second side 11b. A first side plate portion 15 is integrally formed with the third side 11c. The first side plate portion 15 connects the top plate portion 13 and the bottom plate portion 14. The fourth side 11d is located opposite the third side 11c in the X direction. A second side plate portion 16 is integrally formed with the fourth side 11d. The second side plate portion 16 faces the first side plate portion 15 in the X direction. The second side plate portion 16 connects the top plate portion 13 and the bottom plate portion 14. The thickness of the first side plate portion 15 and the second side plate portion 16 is, for example, 0.25 mm or more and 5 mm or less.

[0023] The second plate portion 12 is fixed to the top plate portion 13, the bottom plate portion 14, the first side plate portion 15, and the second side plate portion 16 on the side opposite to the first plate portion 11. The shape of the second plate portion 12 when viewed from the Y direction is rectangular. The outer surface of the second plate portion 12 (the surface opposite to the first plate portion 11) forms the rear surface. As described above, when the wall structure 1 is installed as the soundproof wall and the outer surface of the first plate portion 11 forms the track surface, the outer surface of the second plate portion 12 forms the civil ground surface.

[0024] In the first embodiment, the first plate portion 11 has a first region 111 including a first side 11a and a second region 112 including a second side 11b. The first region 111 is disposed so that the plate thickness direction of the first region 111 coincides with the Y direction (depth direction). The second region 112 is inclined so that the distance between the second region 112 and the second plate portion 12 increases as the distance from the lower end of the first region 111 goes downward. Therefore, the second region 112 constitutes an inclined portion of the first plate portion 11.

[0025] 2, the length of the bottom plate portion 14 along the Y direction is longer than the length of the top plate portion 13 along the Y direction. The lengths of the first side plate portion 15 and the second side plate portion 16 along the Y direction increase toward the bottom plate portion 14 as the second region 112 slopes.

[0026] A plurality of mounting portions 20 are formed discretely along the X direction on the wall structure 1. Although Fig. 1 illustrates a wall structure 1 having three mounting portions 20, the number of mounting portions 20 is not limited to three, and may be one, two, or four or more.

[0027] An opening 21 is formed in the second region 112 at the position of the mounting portion 20 so that a portion of the bottom plate portion 14 is exposed. The opening 21 is formed from the second side 11b of the first plate portion 11 toward the lower end of the first region 111. The opening 21 can also be called a cutout portion. When viewed in the plate thickness direction of the second region 112, the opening 21 has a rectangular shape. The opening 21 has an upper side 21a opposite the second side 11b and a pair of side sides 21b, 21b facing each other along the X direction.

[0028] 2, an inclined plate 22 is formed from the upper side 21a toward the second plate portion 12. An example of the inclination angle of the inclined plate 22 is 30° or more and 60° or less with respect to the horizontal plane. An example of the thickness of the inclined plate 22 is 0.25 mm or more and 5 mm or less.

[0029] A pair of side plates 23, 23 are provided on both ends of the mounting portion 20 in the X direction. The pair of side plates 23 are formed between the opening 21, the bottom plate portion 14, and the inclined plate 22 so that the plate thickness direction of the side plates 23 coincides with the X direction. In other words, the mounting portion 20 is composed of the inclined plate 22, the pair of side plates 23, and the opening 21. An example thickness of the side plates 23 is 0.25 mm or more and 5 mm or less.

[0030] At the positions of the mounting portions 20 in the bottom plate portion 14, mounting holes 14a are formed that penetrate the bottom plate portion 14 in the Z direction. As shown in FIG. 2, two mounting holes 14a spaced apart in the Y direction are formed in each mounting portion 20. The number of mounting holes 14a may be one, or may be three or more. The mounting holes 14a are used to mount the wall structure 1 to a fixed portion such as a skeleton.

[0031] 1 and 3, a flange 31 is formed on the first side plate 15 side of both ends in the X direction on the second plate 12 side of the wall structure 1, protruding away from the second side plate 16. The flange 31 is formed by a flange 151 formed on the first side plate 15 and a flange region 121 of the second plate 12 that covers the flange 151. The flange 31 may be formed only by the second plate 12.

[0032] Of both end portions in the X direction on the second plate portion 12 side of the wall structure 1, a receiving recess 32 recessed from the second plate portion side toward the first plate portion 11 side is formed on the second side plate portion 16 side. The receiving recess 32 extends in the Z direction from a position corresponding to the bottom plate portion 14 to a position corresponding to the top plate portion 13. In order to form the receiving recess 32, portions of the top plate portion 13 and the bottom plate portion 14 corresponding to the receiving recess 32 are formed with a step recessed toward the first plate portion 11, and a portion of the second plate portion 12 corresponding to the receiving recess 32 is formed with a step protruding toward the first plate portion 11, and further, the length in the Y direction of the second side plate portion 16 is shorter than the length in the Y direction of the first side plate portion 15.

[0033] As shown in Figures 1 to 3, the wall structure 1 includes a plurality of inner ribs 17 disposed within the wall structure 1. The plurality of inner ribs 17 are arranged between the first plate portion 11 and the second plate portion 12. The plurality of inner ribs 17 are arranged in parallel along a predetermined direction. In the first embodiment, the predetermined direction is the X direction. In the first embodiment, unless otherwise specified, a form will be described in which the plurality of inner ribs 17 are arranged between the first region 111 of the first plate portion 11 and a region of the second plate portion 12 facing the first region 111.

[0034] An example of the inner rib 17 will be described. As shown in Fig. 2, the inner rib 17 is a plate-like member that is rectangular when viewed from the X direction and extends in the Z direction. The thickness of the inner rib 17 (the length in the X direction in Fig. 3) is, for example, 0.25 mm or more and 5 mm or less.

[0035] The inner rib 17 is integrally joined to the first plate portion 11, but is not joined to the second plate portion 12. As shown in FIG. 3, the length L1 (mm) of the inner rib 17 in the Y direction may be shorter than the length L2 (mm) between the first plate portion 11 and the second plate portion 12. In this case, a gap can be secured between the second plate portion 12 and the inner rib 17. The length L2 is the distance between the portion of the second plate portion 12 other than the flange 31 and the receiving recess 32 and the first region 111 of the first plate portion 11. An example of the length L2 is 25 mm or more and 755 mm or less. The lengths of the multiple inner ribs 17 may be the same or different.

[0036] Although four inner ribs 17 are illustrated in FIG. 1, the number of inner ribs 17 is not limited to four. If the inner ribs 17 are not joined (or fixed) to the second plate portion 12, they may be in contact with the second plate portion 12. The inner ribs 17 may have a flange at the end on the first plate portion 11 side. If the inner ribs 17 are not joined to the second plate portion 12, they may have a flange at the end on the second plate portion 12 side.

[0037] In the wall structure 1, the inner ribs 17, the inclined plates 22, etc. may have ventilation holes formed therein.

[0038] The wall structure 1 is made of FRP (Fiber Reinforced Plastics) members formed from a continuous fiber base material. Specifically, the first plate portion 11, the second plate portion 12, the top plate portion 13, the bottom plate portion 14, the first side plate portion 15, the second side plate portion 16, the multiple inner ribs 17, the inclined plate 22, and the pair of side plates 23 of the wall structure 1 are all formed from FRP members formed from a continuous fiber base material.

[0039] As the reinforcing fibers of the FRP, for example, glass fiber, aramid fiber, carbon fiber, etc. can be used alone or in combination. The inclusion of carbon fiber improves the specific strength and specific rigidity, thereby enabling further weight reduction of the molded body.

[0040] Examples of the form of reinforcing fibers include substrates that are appropriately combined with short fibers or mats with fiber lengths of 1 to 3 mm, cloths or strands made of continuous fibers, etc. The matrix resin for FRP is not particularly limited, but examples include thermosetting resins such as epoxy resin, unsaturated polyester resin, and vinyl ester resin, and thermoplastic resins such as polyethylene, polypropylene, nylon, ABS (acrylonitrile butadiene styrene), PEEK (polyether ether ketone), and polyimide.

[0041] The molding methods for molding the above FRPs can use matrix resins or, depending on the morphology of the reinforcing fibers, FRPs can be easily molded using a variety of molding methods, including vacuum, blow molding, stamping, BMC (bulk molding compound), SMC (sheet molding compound), transfer molding, RTM (resin transfer molding), and hand lay-up molding.

[0042] Furthermore, by adding powders (e.g., calcium carbonate, sand, etc.) to increase viscosity, layered compounds (e.g., mica, molybdenum disulfide, boron nitride, etc.), acicular compounds (e.g., xonotlite, potassium titanate, carbon fiber, etc.), granular or sheet compounds (e.g., ferrite, talc, clay, etc.) to the filler, the mutual movement between inorganic crystals or between the inorganic material and the matrix is ​​converted into frictional heat. By adding the filler, the elastic modulus and density are increased, increasing resistance to vibration and improving vibration-damping properties. As a result, the wall structure 1 of the first embodiment can reduce vibration when used on viaducts, road bridge girders, etc. during train operation. Adding aluminum hydroxide, bromine, inorganic powder, etc. to the filler can improve flame retardancy, making such wall structure 1 suitable for constructing railroad balustrades due to its flame retardancy.

[0043] 4 is a perspective view showing an example of construction of the wall structure 1 according to the first embodiment. When constructing the wall structures 1, a plurality of wall structures 1 are arranged in the X direction relative to the main body 40. At this time, one flange 31 of adjacent wall structures 1 is arranged facing the receiving recess 32 of the other. One flange 31 of adjacent wall structures 1 is configured to be able to fit into the receiving recess 32 of the other wall structure 1. Specifically, the flange 31 and the receiving recess 32 are configured so that their opposing surfaces can abut when the flange 31 and the receiving recess 32 are arranged facing each other.

[0044] In the wall structure 1 as a soundproof wall, sound diffraction occurs at the contact point between the flange 31 and the receiving recess 32, thereby achieving a noise reduction effect. Although not shown, generally, at the overlapping portion of adjacent wall structures 1, a cushion packing extending in the Z direction (height direction) is installed in the gap in the Y direction (depth direction) to prevent sound generated in the track from leaking.

[0045] As shown in FIG. 4 , the wall structure 1 is attached to the skeleton 40 by an attachment means. This attachment means includes a bolt 41 extending from the skeleton 40 to which the wall structure 1 is attached, a nut 51 fitted onto the bolt 41, and a metal seat plate 52 used to distribute the bearing pressure when the nut 51 is tightened. The seat plate 52 is formed, for example, in a rectangular shape when viewed in the thickness direction. The seat plate 52 has a through hole penetrating in the thickness direction, through which the bolt 41 is inserted. When attaching the wall structure 1 to the skeleton 40, the bolt 41 is passed through the attachment hole 14a of the attachment portion 20 and the through hole of the seat plate 52, and then the bolt 41 is tightened with the nut 51. In this way, the wall structure 1 is attached to the skeleton 40 by the attachment means.

[0046] The wall structure 1 is manufactured, for example, as follows.

[0047] In the wall structure 1, an intermediate body having the first plate portion 11, the top plate portion 13, the bottom plate portion 14, the first side plate portion 15, the second side plate portion 16, and the inclined plate 22 and pair of side plates 23 that respectively constitute the multiple mounting portions 20 is integrally molded using FRP. The intermediate body is a portion of the wall structure 1 that does not have the multiple inner ribs 17 and the second plate portion 12. At the stage of the intermediate body, the multiple mounting holes 14a are not formed. The multiple inner ribs 17 are molded using FRP. The second plate portion 12 is molded using FRP.

[0048] After arranging the inner ribs 17 at predetermined positions on the first plate portion 11 of the intermediate body, the inner ribs 17 and the intermediate body (specifically, the first plate portion 11) are integrated by overlaying. The predetermined positions may be the positions where the inner ribs 17 are arranged as shown in Figures 1 and 3.

[0049] In the intermediate body with the multiple inner ribs 17 integrated therein, the second plate portion 12 is placed on the opposite side of the first plate portion 11, and the second plate portion 12 is joined to the intermediate body. The joining can be performed by a method known in the art of molding using FRP. Then, the mounting holes 14a are drilled to obtain the wall structure 1.

[0050] In the wall structure 1, a plurality of inner ribs 17 are arranged between the first plate portion 11 and the second plate portion 12. The inner ribs 17 are integrally joined to the first plate portion 11, but are not joined to the second plate portion 12. This prevents deterioration of the appearance of the wall structure 1. This will be explained by comparing with a reference example in which each of the plurality of inner ribs is integrally joined to both the first plate portion 11 and the second plate portion 12.

[0051] In the reference example, each of the multiple inner ribs arranged between the first plate portion 11 and the second plate portion 12 is integrally joined to both the first plate portion 11 and the second plate portion 12. A wall structure according to this reference example is installed outdoors as a soundproof wall. The wall structure is installed so that the outer surfaces of the first plate portion 11 and the second plate portion 12 are the track surface and the civil ground, as described above. When the wall structure is installed outdoors, thermal expansion occurs in the first plate portion 11 and the second plate portion 12 due to the influence of direct sunlight, the ambient temperature, and the like. Because the first plate portion 11 and the second plate portion 12 are connected (or fixed) by the inner ribs, even if the thermal expansion occurs, the thermal expansion of the first plate portion 11 and the second plate portion 12 is inhibited at the positions of the inner ribs, while the thermal expansion of the first plate portion 11 and the second plate portion 12 is not inhibited between adjacent inner ribs. As a result, the first plate portion 11 and the second plate portion 12 become wavy. Specifically, depressions are formed at the joints with each inner rib, while bulges occur between adjacent inner ribs, resulting in an uneven structure on the outer surfaces of the first plate portion 11 and the second plate portion 12. As a result, the appearance of the wall structure of the reference example is degraded. In particular, the second plate portion 12, which is located opposite the road or railroad tracks on which vehicles travel, is visible to people living in the area surrounding the installation location of the wall structure, and therefore, any deterioration in appearance is easily noticeable. For example, when the setting sun shines on the second plate portion 12, the wavy state of the second plate portion 12 is noticeable, degrading the appearance of the wall structure and potentially making it appear as if the wall structure has deteriorated, even though the function of the wall structure is not affected.

[0052] In contrast, in the wall structure 1 according to the first embodiment, the inner rib 17 is integrally joined to the first plate portion 11 but not to the second plate portion 12. Therefore, even if thermal expansion occurs in the first plate portion 11 and the second plate portion 12, it is unlikely that portions where expansion is inhibited will occur, as in the case of the reference example. As a result, the deformable regions of the first plate portion 11 and the second plate portion 12 (regions not fixed to the top plate portion 13, bottom plate portion 14, etc.) expand uniformly, making it unlikely that waving will occur as described in the reference example. As a result, the wall structure 1 can prevent deterioration of its appearance. In particular, when the wall structure 1 is installed so that the outer surfaces of the first plate portion 11 and the second plate portion 12 are track surfaces and civil ground surfaces as described above, it is possible to prevent deterioration of the appearance when viewed from the second plate portion 12 side.

[0053] As shown in Fig. 3, when the length L1 of the inner rib 17 is shorter than the distance L2 between the first plate portion 11 and the second plate portion 12, a gap is created between the inner rib 17 and the second plate portion 12. This makes it even less likely that the second plate portion 12 will be inhibited from thermally expanding. As a result, deterioration of the appearance as viewed from the second plate portion 12 side is more effectively prevented.

[0054] Even if the inner rib 17 is in contact with the second plate portion 12, as long as they are not joined, the thermal expansion of the second plate portion 12 is not hindered. Therefore, deterioration of the appearance as viewed from the second plate portion 12 side is further prevented.

[0055] The inner rib 17 is integrally joined to the first plate portion 11, and therefore can reinforce the strength of the wall structure 1 (particularly the first plate portion 11 or the portion on the first plate portion 11 side).

[0056] When the wall structure 1 is made of FRP, it is possible to reduce the weight of the wall structure 1. This configuration of the wall structure 1 is effective because FRP is easily affected by the above-mentioned thermal expansion due to direct sunlight, the ambient temperature, etc.

[0057] Next, a modification of the wall structure 1 of the first embodiment will be described.

[0058] (Variation 1) Fig. 5 is a cross-sectional view of a wall structure according to Modification 1. The wall structure according to Modification 1 is referred to as a wall structure 1A. Fig. 5 is a cross-sectional view of the wall structure 1A at a position corresponding to the cross-sectional view shown in Fig. 3 in the first embodiment.

[0059] In the wall structure 1A, the multiple inner ribs 17 are integrally joined to the second plate portion 12, but are not joined to the first plate portion 11. The configuration of the inner ribs 17 in the first modification is the same as the inner ribs 17 in the first embodiment. The configuration of the wall structure 1A is the same as the configuration of the wall structure 1, except that the arrangement of the multiple inner ribs 17 is different.

[0060] The wall structure 1A is manufactured, for example, as follows. The intermediate body, the plurality of inner ribs 17, and the second plate portion 12 described in the first embodiment are molded in the same manner as when manufacturing the wall structure 1 described in the first embodiment. The plurality of inner ribs 17 are arranged at predetermined positions on the second plate portion 12, and then integrated with the second plate portion 12 by overlaying. The predetermined positions are the positions of the inner ribs 17 shown in FIG. 5. Thereafter, the second plate portion 12 integrated with the plurality of inner ribs 17 is joined to the intermediate body. Next, the mounting holes 14a are drilled to obtain the wall structure 1A.

[0061] In the wall structure 1A, the multiple inner ribs 17 are integrally joined to the second plate portion 12, but are not joined to the first plate portion 11. Therefore, similar to the case of the wall structure 1, thermal expansion of the first plate portion 11 and the second plate portion 12 is not hindered at the position of each inner rib 17. Moreover, the configuration of the wall structure 1A is the same as the configuration of the wall structure 1, except for the arrangement of the multiple inner ribs 17. As a result, the wall structure 1A has the same effects as the wall structure 1.

[0062] In the wall structural body 1A, the inner rib 17 is integrally joined to the second plate portion 12, and therefore the strength of the wall structural body 1A (particularly the portion of the second plate portion 12) can be reinforced.

[0063] (Variation 2) Fig. 6 is a cross-sectional view of a wall structure according to Modification 2. The wall structure according to Modification 2 is referred to as wall structure 1B. Fig. 6 is also a cross-sectional view of wall structure 1B at a position corresponding to the cross-sectional view shown in Fig. 3 in the first embodiment.

[0064] 6, the multiple inner ribs 17 include multiple first inner ribs 17A that are integrally joined to the first plate portion 11 but are not joined to the second plate portion 12, and multiple second inner ribs 17B that are integrally joined to the second plate portion 12 but are not joined to the first plate portion 11. The multiple first inner ribs 17A and the multiple second inner ribs 17B are arranged so as not to contact each other.

[0065] The configurations of the first inner rib 17A and the second inner rib 17B are the same as the configuration of the inner rib 17 in the first embodiment. The configuration of the wall structure 1B is the same as the configuration of the wall structure 1, except that the plurality of inner ribs 17 have the plurality of first inner ribs 17A and the plurality of second inner ribs 17B.

[0066] The wall structure 1B is manufactured, for example, as follows. The intermediate body and the second plate portion 12 described in the first embodiment are molded in the same manner as when manufacturing the wall structure 1 described in the first embodiment. In Modification 2, a plurality of first inner ribs 17A and a plurality of second inner ribs 17B are molded. Thereafter, the plurality of first inner ribs 17A are arranged on the first plate portion 11 of the intermediate body and then integrated with the first plate portion 11 by overlaying, and the plurality of second inner ribs 17B are arranged on the second plate portion 12 and then integrated with the second plate portion 12 by overlaying. Next, the intermediate body including the first plate portion 11 integrated with the plurality of first inner ribs 17A is joined to the second plate portion 12 integrated with the plurality of second inner ribs 17B. Thereafter, the mounting holes 14a are formed to obtain the wall structure 1B.

[0067] The wall structure 1B has a plurality of first inner ribs 17A that are integrally joined to the first plate portion 11 but not joined to the second plate portion 12, and a plurality of second inner ribs 17B that are integrally joined to the second plate portion 12 but not joined to the first plate portion 11. The first inner ribs 17A and the second inner ribs 17B do not contact each other. The wall structure 1B having this configuration corresponds to a configuration that combines the configuration of the first embodiment and the configuration of Modification 1. Therefore, the wall structure 1B has the same functions and effects as the wall structures 1 and 1A.

[0068] (Variation 3) Fig. 7 is a cross-sectional view of a wall structure according to Modification 3. The wall structure according to Modification 3 is referred to as a wall structure 1C. Fig. 7 is also a cross-sectional view of the wall structure 1C at a position corresponding to the cross-sectional view shown in Fig. 3 in the first embodiment.

[0069] In the third modification, the inner ribs 17 are integrally fixed to the first plate portion 11, but are not fixed to the second plate portion 12, as in the first embodiment.

[0070] The length in the Y direction of the multiple inner ribs 17 in Modification 3 is a length that gently curves the second plate portion 12 outward (toward the opposite side from the first plate portion 11). Because the multiple inner ribs 17 cause the second plate portion 12 to curve, the length in the Y direction of the inner ribs 17 is longer than the distance between the first plate portion 11 and the second plate portion 12 when the inner ribs 17 are not provided. The distance between the first plate portion 11 and the second plate portion 12 when the inner ribs 17 are not provided is the length L2 shown in FIG. 3.

[0071] In one example, the length in the Y direction of the multiple inner ribs 17 is the length at which the second plate portion 12 curves with a predetermined radius of curvature. An example of the predetermined radius of curvature is approximately 12,500 mm or more and approximately 50,000 mm or less. In variant example 3, the multiple inner ribs 17 cause the second plate portion 12 to curve, so the multiple inner ribs 17 come into contact with the second plate portion 12. However, as described above, the multiple inner ribs 17 are not integrally joined to the second plate portion 12.

[0072] The configuration of the wall structure 1C according to the third modification is the same as that of the wall structure 1, except that the length of the inner ribs 17 is different from that of the wall structure 1, thereby curving the second plate portion 12. The wall structure 1C is manufactured in the same manner as the wall structure 1 according to the first embodiment, except that the inner ribs 17 are formed to have a length that curves the second plate portion 12 as described above.

[0073] In the wall structure 1C, as described above, the inner ribs 17 contact the second plate portion 12 but are not integrally joined to the second plate portion 12. Therefore, it is difficult to create areas that hinder the thermal expansion of the first plate portion 11 and the second plate portion 12, as described in the reference example of the first embodiment. Therefore, the wall structure 1C has the same effects as the wall structure 1.

[0074] The second plate portion 12 is curved in the opposite direction to the first plate portion 11 and the inner rib 17. In this case, the second plate portion 12 is more likely to be subjected to a force in the opposite direction to the first plate portion 11 and the inner rib 17, and therefore is more likely to expand in the opposite direction to the first plate portion 11 and the inner rib 17 when thermally expanding. Therefore, the thermal expansion of the second plate portion 12 is not substantially hindered at the position of the inner rib 17. This more reliably prevents deterioration of the appearance of the wall structure 1C when viewed from the second plate portion 12 side.

[0075] (Second embodiment) Fig. 8 is a perspective view of the wall structure according to the second embodiment, and Fig. 9 is a cross-sectional view taken along line XI-XI shown in Fig. 8.

[0076] The wall structure 1D according to the second embodiment differs from the wall structure 1 according to the first embodiment in that the inner ribs 17 are arranged so that the thickness direction of the inner ribs 17 coincides with the Z direction. Other than this difference, the configuration of the wall structure 1D is the same as that of the wall structure 1.

[0077] In the embodiment shown in Figures 8 and 9, the multiple inner ribs 17 include multiple first inner ribs 17C that are integrally joined to the first plate portion 11 but not integrally joined to the second plate portion 12, and multiple second inner ribs 17D that are integrally joined to the second plate portion 12 but not integrally joined to the first plate portion 11. The multiple first inner ribs 17C are arranged in parallel in a predetermined direction, and the multiple second inner ribs 17D are also arranged in parallel in the predetermined direction. In the second embodiment, the predetermined direction is the Z direction. The length of the first inner rib 17C and the second inner rib 17D in the Y direction is shorter than the distance between the first plate portion 11 and the second plate portion 12. The length of the first inner rib 17C and the second inner rib 17D in the Y direction may be the same as the distance between the first plate portion 11 and the second plate portion 12.

[0078] The wall structure 1D is manufactured, for example, as follows. The intermediate body and the second plate portion 12 described in the first embodiment are molded in the same manner as when manufacturing the wall structure 1 described in the first embodiment. In the second embodiment, a plurality of first inner ribs 17C and a plurality of second inner ribs 17D are molded. Thereafter, the plurality of first inner ribs 17C are arranged on the first plate portion 11 of the intermediate body and then integrated with the first plate portion 11 by overlaying, and the plurality of second inner ribs 17D are arranged on the second plate portion 12 and then integrated with the second plate portion 12 by overlaying. Next, the intermediate body including the first plate portion 11 integrated with the plurality of first inner ribs 17C is joined to the second plate portion 12 integrated with the plurality of second inner ribs 17D. Thereafter, the mounting holes 14a are formed, thereby obtaining the wall structure 1D.

[0079] In the wall structure 1D, the first inner ribs 17C are integrally joined to the first plate portion 11 but are not integrally joined to the second plate portion 12, and the second inner ribs 17D are integrally joined to the second plate portion 12 but are not integrally joined to the first plate portion 11. Furthermore, the first inner ribs 17C and the second inner ribs 17D are not in contact with each other. Therefore, it is difficult to create areas that hinder the thermal expansion of the first plate portion 11 and the second plate portion 12, as described in the reference example of the first embodiment. Therefore, the wall structure 1D has the same effects as the wall structure 1.

[0080] In the second embodiment, all of the multiple inner ribs 17 may be first inner ribs 17C. That is, all of the multiple inner ribs 17 of the wall structure 1D may be integrally joined to the first plate portion 11, but may be disposed between the first plate portion 11 and the second plate portion 12 so as not to be joined to the second plate portion 12. In this way, when all of the multiple inner ribs 17 are first inner ribs 17C, the multiple inner ribs 17 may have a length that curves the second plate portion 12 in the opposite direction to the first plate portion 11, as described in Modification 3 of the first embodiment. In this case, the second plate portion 12 is curved in the opposite direction to the first plate portion 11 when viewed in the X direction.

[0081] In the second embodiment, all of the inner ribs 17 may be second inner ribs 17D. That is, all of the inner ribs 17 of the wall structure 1D may be integrally joined to the second plate portion 12, but may be disposed between the first plate portion 11 and the second plate portion 12 so as not to be joined to the first plate portion 11.

[0082] (Third embodiment) Fig. 10 is a perspective view of a wall structure according to a third embodiment. Fig. 11 is a view of the wall structure 1E shown in Fig. 10 as seen from the top panel 13 side. Fig. 12 is a cross-sectional view taken along line XII-XII in Fig. 10.

[0083] The wall structure 1E differs from the wall structure 1 according to the first embodiment in that it does not have multiple inner ribs 17 and that the second plate portion 12 is curved in the opposite direction to the first plate portion 11. Other than the above differences, the configuration of the wall structure 1E is the same as that of the wall structure 1.

[0084] The wall structure 1E is manufactured, for example, as follows. The intermediate body described in the first embodiment is molded in the same manner as when manufacturing the wall structure 1 described in the first embodiment. In the third embodiment, the curved second plate portion 12 is molded as shown in Figures 10 and 11. Then, the second plate portion 12 is placed on the intermediate body so that the second plate portion 12 is curved in the opposite direction to the first plate portion 11, and then they are joined together. Then, the mounting holes 14a are drilled to obtain the wall structure 1E.

[0085] The wall structure 1E does not have inner ribs fixed to the first plate portion 11 and the second plate portion 12 between the first plate portion 11 and the second plate portion 12, as described as a reference example in the first embodiment. Therefore, even if the first plate portion 11 and the second plate portion 12 thermally expand due to direct sunlight or the like, no portions of the first plate portion 11 and the second plate portion 12 hinder thermal expansion. In this case, the first plate portion 11 and the second plate portion 12 are less likely to corrugate, thereby preventing deterioration of the appearance of the wall structure 1E. Furthermore, because the second plate portion 12 is curved outward in the direction opposite the first plate portion 11, when thermal expansion occurs in the second plate portion 12, it is more likely to expand outward. As a result, the occurrence of corrugation in the second plate portion 12 is further suppressed. As a result, deterioration of the appearance of the wall structure 1E when viewed from the second plate portion 12 side is further prevented.

[0086] The present invention has been described above with reference to the drawings. The above-described embodiments are merely examples of the present invention, and the present invention is not limited to these examples. The scope of the claims is intended to include all modifications within the scope of the claims and their equivalent meanings.

[0087] For example, in the various embodiments and modified examples described above, the first plate portion of the wall structure has a first region and a second region inclined relative to the first region. However, as in the wall structure 1F shown in Fig. 13, the first plate portion 11 does not have to have the second region. In other words, the first plate portion 11 does not have to have a region inclined opposite to the second plate portion 12 at the lower part of the wall structure 1F.

[0088] FIG. 14 is a perspective view of another modified example of the wall structure. The wall structure 1G shown in FIG. 14 does not have the second region 112, the flange 31, and the receiving recess 32 shown in FIG. 1. Therefore, in the wall structure 1G, the first plate portion 11 and the second plate portion 12 have the same length in the X direction. The wall structure 1G may have an inner rib 17 between the first plate portion 11 and the second plate portion 12, for example, as in the wall structures 1, 1A, 1B, 1C, and 1D. If the wall structure 1G has the inner rib 17 as in the wall structure 1C, the second plate portion 12 of the wall structure 1G may be curved as described in the wall structure 1C. As in the wall structure 1E, the second plate portion 12 may be curved without having the inner rib 17.

[0089] As shown in FIG. 14, the wall structure 1G may be configured such that, for example, two wall structures 1G are combined in the Z direction. One of the two wall structures 1G is referred to as the first wall structure 1G1, and the other is referred to as the second wall structure 1G2. In this case, the bottom plate portion 14 of the first wall structure 1G1 and the top plate portion 13 of the second wall structure 1G2 may be configured to fit together. In the embodiment illustrated in FIG. 14, when viewed from the X direction, the bottom plate portion 14 of the first wall structure 1G1 has a convex portion 141 and a concave portion 142, and the top plate portion 13 of the second wall structure 1G2 has a convex portion 131 and a concave portion 132. The convex portion 131 is formed to fit into the concave portion 142, and the convex portion 141 is formed to fit into the concave portion 132. In a first wall structure 1G1 having a bottom plate portion 14 including a convex portion 141 and a concave portion 142, the length in the Z direction of the second plate portion 12 is longer than the length in the Z direction of the first plate portion 11, and the first wall structure 1G1 has a step at the bottom. In a second wall structure 1G2 having a top plate portion 13 including a convex portion 131 and a concave portion 132, the length in the Z direction of the first plate portion 11 is longer than the length in the Z direction of the second plate portion 12, and the second wall structure 1G2 has a step at the top.

[0090] 14 is a configuration example in which two wall structures 1G (a first wall structure 1G1 and a second wall structure 1G2) are combined, but the wall structures 1G may be configured to combine, for example, three or more wall structures 1G. In this case, for example, the top plate portion 13 and the bottom plate portion 14 of the wall structures 1G other than those at both ends in the Z direction may be configured to fit with the bottom plate portion 14 and the top plate portion 13 of the adjacent wall structure 1G, the bottom plate portion 14 of the wall structure 1G located at the top may be configured to fit with the top plate portion 13 of the adjacent wall structure 1G, and the top plate portion 13 of the wall structure 1G located at the bottom may be configured to fit with the bottom plate portion 14 of the adjacent wall structure 1G.

[0091] In the third embodiment, a form without inner ribs has been described, but the wall structure described in the third embodiment may also have inner ribs, as in the first embodiment, second embodiment, etc.

[0092] The material of the wall structure is not limited to FRP, and the present invention is effective when the wall structure is made of a material that is prone to thermal expansion.

[0093] The wall structure does not have to have the flange 31 and the receiving recess 32 shown in Fig. 1. The wall structure can be applied to soundproof walls (or sound insulation walls) installed on railings for railways and roads, as well as sound insulation walls for noise at construction sites. Furthermore, the wall structure can be applied to windbreak fences, water-blocking walls, snow-blocking fences, etc. in addition to soundproof walls or sound insulation walls.

[0094] The various embodiments and modifications described above may be combined as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0095] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1G1, 1G2...Wall structure 11…First plate part 11a...First side 11b...Second side 11c...third side 11d...4th side 111…First area 112…Second area 12…Second plate part 121...Flange area 13...Top plate 131...Convex part 132...recess 14…Bottom plate part 14a...Mounting hole 141...Convex part 142...recess 15...First side plate part 151...Flange 16…Second side plate part 17...Inner rib 17A, 17C...First inner rib 17B, ​​17D...Second inner rib 20...Mounting part 21...Opening 21a...Top 21b…side 22…Slanted plate 23...Side panel 31...Flange 32...Receiving recess 40...Structure 41...Bolt 51...Nat 52...Seat board

Claims

1. a first plate portion having a first side and a second side that face each other in a second direction that is perpendicular to the first direction, and a third side and a fourth side that connect the first side and the second side and face each other in a third direction that is perpendicular to the first direction and the second direction; a top plate portion connected to the first side; a bottom plate portion connected to the second side; a first side plate portion connected to the third side; a second side plate portion connected to the fourth side; a second plate portion facing the first plate portion in the first direction and connected to the top plate portion, the bottom plate portion, the first side plate portion, and the second side plate portion; a plurality of inner ribs arranged in parallel in a predetermined direction between the first plate portion and the second plate portion; Equipped with the predetermined direction is the second direction or the third direction, Each of the plurality of inner ribs is integrally joined to one of the first plate portion and the second plate portion, but is not joined to the other. Structure for walls.

2. The length of the inner ribs in the first direction is shorter than the length between the first plate portion and the second plate portion.

10. The wall structure of claim 1.

3. the plurality of inner ribs are integrally joined to the first plate portion but are not joined to the second plate portion, The plurality of inner ribs are in contact with the second plate portion so as to curve the second plate portion in an opposite direction to the first plate portion.

10. The wall structure of claim 1.

4. The plurality of inner ribs are a plurality of first inner ribs integrally joined to the first plate portion but not joined to the second plate portion; a plurality of second inner ribs integrally joined to the second plate portion but not joined to the first plate portion; and The plurality of first inner ribs and the plurality of second inner ribs are not in contact with each other.

10. The wall structure of claim 1.

5. a first plate portion having a first side and a second side that face each other in a second direction that is perpendicular to the first direction, and a third side and a fourth side that connect the first side and the second side and face each other in a third direction that is perpendicular to the first direction and the second direction; a top plate portion connected to the first side; a bottom plate portion connected to the second side; a first side plate portion connected to the third side; a second side plate portion connected to the fourth side; a second plate portion facing the first plate portion in the first direction and connected to the top plate portion, the bottom plate portion, the first side plate portion, and the second side plate portion; A wall structure, wherein the second plate portion is curved in an opposite direction to the first plate portion.

Images