Rainwater storage block

Abstract

To provide a rainwater storage block having sufficient strength.SOLUTION: The rainwater storage block 10 comprises: a main body 11 that has a plate-like body 12 and a crest portion 17 protruding from the plate-like body 12 toward a first side Z1 in a thickness direction Z of the plate-like body 12; and a reinforcing member 27 that can be attached to the main body 11.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a rainwater retention block. [Background technology]

[0002] Conventionally, rainwater storage blocks are buried underground or the like, and rainwater is stored in gaps formed by the rainwater storage blocks (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-107267 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the rainwater storage block of Patent Document 1 may not have sufficient strength to withstand the required vertical load. In addition, if the thickness of the rainwater storage block is increased, the rainwater storage block becomes heavy and difficult to install by hand alone. For this reason, heavy machinery may be required to install the rainwater storage block, which may limit the installation site and increase the cost of installation.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a rainwater storage block having sufficient strength. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes the following means. (1) Aspect 1 of the present invention is a rainwater storage block comprising a plate-shaped body, a main body having a ridge portion protruding from the plate-shaped body toward a first side in the thickness direction of the plate-shaped body, and a reinforcing member attachable to the main body. In this invention, for example, rainwater can be stored in a space on the side of the peak portion on the first side in the thickness direction of the plate-like body. Furthermore, since the main body is reinforced by the reinforcing members attached to the main body, it is possible to obtain sufficient strength as a rainwater storage block.

[0007] (2) A second aspect of the present invention may be the rainwater storage block according to (1), in which the reinforcing member is attachable to the plate-like body and covers at least a portion of the peak portion. In this invention, for example, an external force acting on the reinforcing member from a first side in the thickness direction to a second side in the thickness direction is transmitted to the plate-like body to which the reinforcing member is attached. Therefore, it is no longer necessary to support this external force only with the peaks, and the force can be dispersed to the plate-like body via the reinforcing member. Therefore, the main body can be reinforced by the reinforcing member that covers at least a part of the peaks.

[0008] (3) A third aspect of the present invention may be the rainwater retention block according to (2), in which the reinforcing member covers an end face of the peak portion on the first side in the thickness direction. In this invention, the main body can be reinforced by the reinforcing member that covers the end face of the peak portion on the first side in the thickness direction.

[0009] (4) A fourth aspect of the present invention may be a rainwater storage block according to (2) or (3), in which the reinforcing member covers at least a part of a lateral surface of the peak portion in the thickness direction. In this invention, the main body can be reinforced by the reinforcing member that covers at least a part of the lateral surface of the peak portion in the thickness direction.

[0010] (5) A fifth aspect of the present invention may be a rainwater storage block described in any one of (2) to (4), wherein the main body has a plurality of ridges, and the reinforcing member covers the plurality of ridges across the plurality of ridges. In this invention, the main body can be reinforced by the reinforcing member that spans and covers a plurality of peaks.

[0011] (6) A sixth aspect of the present invention may be the rainwater storage block according to (1), wherein the reinforcing member protrudes from the plate-like body toward the first side in the thickness direction. In this invention, for example, an external force acting on the peak from a first side in the thickness direction to a second side in the thickness direction is transmitted to the plate-like body not only through the peak but also through the reinforcing member, making the peak less susceptible to damage from the external force and enabling the body to be reinforced.

[0012] (7) A seventh aspect of the present invention may be a rainwater storage block as described in (6), wherein the main body has a plurality of the ridge portions, and the reinforcing member is arranged between a pair of adjacent ridge portions along the main surface of the plate-shaped body. In this invention, an external force acting between the pair of peaks can be transmitted to the plate-like body via the reinforcing member. Effect of the Invention

[0013] The rainwater retention block of the present invention can provide a rainwater retention block having sufficient strength. [Brief description of the drawings]

[0014] [Figure 1] 1 is a cross-sectional view of a rainwater storage tank in which a rainwater storage block according to a first embodiment of the present invention is used. [Diagram 2] FIG. 2 is a plan view of the rainwater storage block. [Diagram 3] FIG. 3 is an enlarged view of a main part in FIG. 2. [Figure 4] 4 is a cross-sectional view taken along line A1-A1 in FIG. 3. [Diagram 5] 4 is a cross-sectional view taken along line A2-A2 in FIG. 3. [Figure 6] FIG. 11 is a front view of a main part of a rainwater storage block in a first modified example of the first embodiment of the present invention. [Figure 7] FIG. 2 is a side view of a main part of the rainwater storage block. [Figure 8] FIG. 11 is a front view of a main part of a rainwater storage block in a second modified example of the first embodiment of the present invention. [Figure 9] FIG. 2 is a side view of a main part of the rainwater storage block. [Figure 10] FIG. 13 is a front view of a main part of a rainwater storage block in a third modified example of the first embodiment of the present invention. [Figure 11] FIG. 13 is a perspective view of a ridge portion in a fourth modified example of the first embodiment of the present invention. [Figure 12] FIG. 13 is a perspective view of a peak portion in a fifth modified example of the first embodiment of the present invention. [Figure 13] FIG. 13 is a perspective view of a ridge portion in a sixth modified example of the first embodiment of the present invention. [Figure 14] FIG. 11 is a front cross-sectional view of a main part of a rainwater storage block according to a second embodiment of the present invention. [Figure 15] FIG. 2 is a cross-sectional side view of a main part of the rainwater storage block. [Figure 16] FIG. 11 is a front cross-sectional view of a main part of a rainwater storage block according to a first modified example of the second embodiment of the present invention. [Figure 17] FIG. 2 is a cross-sectional side view of a main part of the rainwater storage block. [Figure 18] FIG. 13 is a cross-sectional view showing a main part of a rainwater storage block according to a second modified example of the second embodiment of the present invention, as viewed from the front. [Figure 19] FIG. 2 is a cross-sectional side view of a main part of the rainwater storage block. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] (First embodiment) Hereinafter, a first embodiment of a rainwater storage block according to the present invention will be described with reference to FIGS. As shown in Fig. 1, a rainwater storage block 10 of this embodiment is used in a rainwater storage tank 1. The rainwater storage tank 1 includes a plurality of rainwater storage blocks 10 and a storage section 40. First, the rainwater storage block 10 will be described below.

[0016] 2 to 5, the rainwater storage block 10 includes a main body 11 and a reinforcing connector 26. In addition, in Fig. 2, a rainwater storage block 10B, which will be described later, is indicated by a two-dot chain line. The main body 11 has a plate-like body 12 and a plurality of ridges 17. There is no limit to the number of ridges 17 that the main body 11 has, and the number may be one.

[0017] For example, the plate-like body 12 is formed into a plate shape that is a square when viewed in the thickness direction Z of the plate-like body 12. Note that the shape of the plate-like body when viewed in the thickness direction of the plate-like body is not limited to a square, and may be a rectangle, a hexagon, or the like. The plate-like body 12 has a plurality of through holes 12a formed therein, which penetrate the plate-like body 12 in the thickness direction Z. Here, directions along the main surface 12c of the plate-like body 12 and perpendicular to each other are defined as a first direction X and a second direction Y. The main surface 12c is a surface facing a first side Z1 (hereinafter simply referred to as the first side Z1) in the thickness direction Z of the plate-like body 12. The side opposite to the first side Z1 in the thickness direction Z is referred to as a second side Z2 in the thickness direction Z (hereinafter simply referred to as the second side Z2).

[0018] To explain in more detail, for example, the plate-like body 12 has a plurality of first belt-like members 13 and a plurality of second belt-like members 14. Each first belt-shaped member 13 is disposed so that its thickness direction is perpendicular to the second direction Y and extends in the first direction X. The multiple first belt-shaped members 13 are disposed at intervals from one another in the second direction Y. Each second belt-shaped member 14 is disposed so that its thickness direction is perpendicular to the first direction X and extends in the second direction Y. The multiple second belt-shaped members 14 are disposed in the first direction X at intervals from one another. As described above, the multiple first belt-shaped members 13 and the multiple second belt-shaped members 14 are arranged in a lattice pattern.

[0019] A pair of first belt-shaped members 13 adjacent to each other in the second direction Y and a pair of second belt-shaped members 14 adjacent to each other in the first direction X form a through hole 12a. The first belt-shaped members 13 and the second belt-shaped members 14 are cut out at portions that overlap the peaks 17 in the thickness direction Z.

[0020] 3 to 5, in this example, the peaks 17 are formed in a quadrangular pyramid dome shape that is open to the second side Z2. The length of the peaks 17 in the first direction X is longer than the length of the peaks 17 in the second direction Y. The peaks 17 protrude from the plate-like body 12 toward the first side Z1. The mountain portion 17 has a pair of first side walls 18, a pair of second side walls 19, and a top wall 20. The pair of first side walls 18, the pair of second side walls 19, and the top wall 20 are each formed in a flat plate shape.

[0021] Each of the first side walls 18 has a trapezoidal shape when viewed in the thickness direction of the first side wall 18. Each of the first side walls 18 extends along the first direction X. Each of the first side walls 18 is disposed such that an upper base that is shorter than a lower base is on the first side Z1. The pair of first side walls 18 are spaced apart from each other in the second direction Y and are arranged to gradually approach each other toward the first side Z1. The surfaces of the pair of first side walls 18 facing outward in the second direction Y are lateral surfaces 18a of the peak portions 17 in the thickness direction Z. An end portion of each of the first side walls 18 on the second side Z2 is continuous with the first belt-shaped member 13.

[0022] Each of the second side walls 19 has a trapezoidal shape when viewed in the thickness direction of the second side wall 19. Each of the second side walls 19 extends along the second direction Y. Each of the second side walls 19 is disposed such that an upper base that is shorter than a lower base is on the first side Z1. The pair of second side walls 19 are spaced apart from each other in the first direction X and are arranged to gradually approach each other toward the first side Z1. The surfaces of the pair of second side walls 19 facing outward in the first direction X are lateral surfaces 19a of the peak portion 17 in the thickness direction Z. The end portion of each second side wall 19 on the second side Z2 is continuous with the second belt-shaped member 14.

[0023] The top wall 20 is disposed so as to be perpendicular to the thickness direction Z. The top wall 20 is continuous with the ends of the first sides Z1 of the pair of first side walls 18 and the ends of the first sides Z1 of the pair of second side walls 19. The top wall 20 closes an opening formed by the ends of the first sides Z1 of the pair of first side walls 18 and the ends of the first sides Z1 of the pair of second side walls 19. The surface of the top wall 20 facing the first side Z1 is an end surface 20a of the mountain portion 17 on the first side Z1.

[0024] The thickness of each of the plate-like body 12 and the multiple peaks 17 of the main body 11 is preferably 1 mm to 10 mm, more preferably 1.5 mm to 7 mm. If the thickness is less than 1 mm, it is difficult to obtain sufficient strength. If the thickness exceeds 10 mm, the mass of the main body 11 increases, and the workability of the main body 11 deteriorates. The length of one side of the plate-like body 12 when viewed in the thickness direction Z is preferably 0.3 m or more and 2 m or less. The length of one side is more preferably 0.7 m or more and 1.5 m or less. If the length is less than 0.3 m, assembly during construction takes time, which may result in poor workability. If the length exceeds 2 m, it may be difficult to transport during construction, which may result in poor workability. The mass of the main body 11 is preferably 1 kg or more and 15 kg or less.

[0025] The plate-like body 12 and the multiple ridges 17 of the main body 11 are integrally formed from a synthetic resin such as polypropylene resin, polyester resin, or polyvinyl chloride resin. The synthetic resin may be mixed with recycled container and packaging materials as stipulated in the Container and Packaging Recycling Law. The synthetic resin preferably has a tensile yield stress of 5 MPa (megapascal) or more, and more preferably has a tensile yield stress of 10 MPa or more. The bending stress of the synthetic resin is preferably 10 MPa or more, and more preferably 20 MPa or more.

[0026] 2 to 5, the reinforcing connector 26 has a plurality of reinforcing members 27, a plurality of connecting members 32, and a plurality of fitting portions 34. Note that the reinforcing connector may have only one reinforcing member 27 and a plurality of fitting portions 34, without having a plurality of connecting members 32. The reinforcing member 27 is formed in a U-shape opening on the second side Z2 when viewed in the first direction X (see FIG. 5). In other words, the reinforcing member 27 has a shape in which the peak portion 17 is slightly enlarged while maintaining a similar shape, and does not have a configuration corresponding to the pair of second side walls 19. That is, the reinforcing member 27 has a pair of first side walls 28 and a top wall 30. The pair of first side walls 28 and the top wall 20 are each formed in a flat plate shape.

[0027] Each of the first side walls 28 has a trapezoidal shape when viewed in the thickness direction of the first side walls 28. Each of the first side walls 28 extends along the first direction X. Each of the first side walls 28 is disposed such that an upper base that is shorter than a lower base is on the first side Z1. The pair of first side walls 28 are disposed at an interval from each other in the second direction Y, and are disposed so as to gradually approach each other as they approach the first side Z1. The top wall 30 is continuous with the ends of the pair of first side walls 28 on the first side Z1. The multiple reinforcing members 27 are disposed in the first direction X at intervals from one another and in the second direction Y at intervals from one another.

[0028] Each of the first side walls 28 contacts the first side wall 18 of the mountain portion 17 from the first side Z1 of the first side wall 18. That is, the reinforcing member 27 does not cover the surface 19a, but covers the surface 18a that is a part of the surfaces 18a, 19a. Each top wall 30 is in contact with the top wall 20 of the peak portion 17 from the first side Z1 of the top wall 20. That is, the top wall 30 of the reinforcing member 27 covers the end face 20a of the peak portion 17.

[0029] The shapes of the multiple connecting members 32 and the multiple fitting portions 34 are not limited. For example, each connecting member 32 has a thickness direction perpendicular to the thickness direction Z and is formed in a band shape extending in the second direction Y. The multiple connecting members 32 are each connected to the first side walls 28 of a pair of reinforcing members 27 adjacent to each other in the second direction Y. The multiple connecting members 32 are spaced apart from each other in the first direction X. For example, each of the fitting portions 34 is formed in a rectangular parallelepiped shape and is fixed to a surface facing the second side Z2 of the multiple connecting members 32. The multiple fitting portions 34 are disposed (press-fitted) in the through-holes 12a of the plate-like body 12 of the main body 11 and are attachable to the multiple first belt-like members 13 and the multiple second belt-like members 14 of the main body 11 and detachable from the main body 11. Each reinforcing member 27 can be attached to the plate-like body 12 and covers a part of the peak portion 17 .

[0030] The multiple fitting portions 34 may be unable to be detached from the main body 11 . The reinforcing members 27, the connecting members 32, and the fitting portions 34 of the reinforcing connector 26 are integrally formed from the same material as the main body 11. The reinforcing connector 26 is formed separately from the main body 11.

[0031] Each rainwater storage block 10 is disposed so that the thickness direction Z is aligned in the vertical direction and the first side Z1 faces upward. As shown in FIGS. 1 and 2, a plurality of rainwater storage blocks 10 are stacked in the thickness direction Z. In the following, the rainwater storage block 10 in which the first direction X is aligned with the reference direction along the horizontal plane is referred to as a rainwater storage block 10A, and the rainwater storage block 10 in which the second direction Y is aligned with the reference direction is referred to as a rainwater storage block 10B. The multiple rainwater storage blocks 10 are alternately arranged along a horizontal plane in the order of rainwater storage blocks 10A, 10B, 10A, . . . from bottom to top.

[0032] 2, at this time, when viewed in the thickness direction Z, the reinforcing member 27 of the reinforcing connector 26 in the rainwater storage block 10A does not overlap the peaks 17 of the main body 11 in the rainwater storage block 10B. Therefore, the reinforcing member 27 of the rainwater storage block 10A does not enter the peaks 17 of the rainwater storage block 10B from below the peaks 17. The plate-like body 12 of the rainwater storage block 10B comes into contact with the reinforcing member 27 of the rainwater storage block 10A from above. Gaps are formed in the thickness direction Z between the plate-like body 12 of the rainwater storage block 10A and the plate-like body 12 of the rainwater storage block 10B, for example.

[0033] The storage unit 40 is not limited as long as it can store a plurality of rainwater storage blocks 10. As shown in FIG. The storage body 41 is made of a waterproof sheet. An opening 42 is formed in the upper part of the storage body 41. A plurality of rainwater storage blocks 10 are stored in the storage body 41. The lid 46 is made of a water-permeable sheet and seals the opening 42 of the storage body 41.

[0034] The rainwater storage tank 1 is buried underground G1. That is, the rainwater storage tank 1 is covered with soil. The rainwater storage tank 1 is connected to upstream equipment 50, such as a drain and a manhole, and downstream equipment 55. The rainwater storage tank 1, the upstream equipment 50, and the downstream equipment 55 are buried in the ground G1 around a building 60, such as a house.

[0035] Next, the operation of the rainwater storage tank 1 configured as above will be described. Rain that falls on the ground surface G2 flows into the rainwater storage tank 1 as rainwater W through, for example, the upstream equipment 50 or the cover 46 of the rainwater storage tank 1. The rainwater storage tank 1 functions as a tank for temporarily storing rainwater, especially during heavy rain. The rainwater W is stored among the multiple rainwater storage blocks 10 in the storage unit 40. The rainwater W stored in the rainwater storage tank 1 is discharged to the downstream equipment 55 at a constant flow rate.

[0036] When the rainwater storage block 10B is transported, the rainwater storage blocks 10A and 10B may be stacked in the thickness direction Z with the blocks facing the same direction along the horizontal plane. At this time, the reinforcing members 27 of the rainwater storage block 10A enter into the ridges 17 of the rainwater storage block 10B from below the ridges 17. Therefore, the rainwater storage blocks 10A and 10B can be stacked compactly in the thickness direction Z.

[0037] In addition, within the storage section 40, multiple rainwater storage blocks may be stacked in the thickness direction with the blocks facing the same direction along the horizontal plane.

[0038] As described above, in the rainwater storage block 10 of this embodiment, rainwater can be stored, for example, in the space on the first side Z1 of the plate-like body 12, beside the peaks 17, or the like. Furthermore, since the main body 11 is reinforced by the reinforcing connector 26 (reinforcing member 27) attached to the main body 11, the rainwater storage block 10 can have sufficient strength. Furthermore, the reinforcing connector 26 can be easily attached to the main body 11 for installation.

[0039] The reinforcing member 27 can be attached to the plate-like body 12 and covers a part of the peaks 17. For example, an external force acting on the reinforcing member 27 from the first side Z1 toward the second side Z2 is transmitted to the plate-like body 12 to which the reinforcing member 27 is attached. Therefore, this external force does not need to be supported by the peaks 17 alone, and can be distributed to the plate-like body 12 via the reinforcing member 27. Therefore, the main body 11 can be reinforced by the reinforcing member 27 that covers a part of the peaks 17.

[0040] The reinforcing member 27 covers the end surface 20a of the peak portion 17. Therefore, the main body 11 can be reinforced by the reinforcing member 27 covering the end surface 20a of the peak portion. The reinforcing member 27 covers the surface 18a of the first side wall 18 without covering the surface 19a of the second side wall 19. Therefore, the main body 11 can be reinforced by the reinforcing member 27 covering the surface 18a of the peak portion 17.

[0041] The rainwater storage block 10 of this embodiment can have a configuration that can be modified in various ways, as described below. 6 and 7, in each component of the rainwater storage block 10, a reinforcing connector 26A may be provided instead of the reinforcing connector 26. The reinforcing member 27A of the reinforcing connector 26A has a pair of second side walls 29A in addition to each component of the reinforcing member 27. The reinforcing member 27A covers the faces 18a and 19a, thereby covering the entire mountain portion 17.

[0042] 8 and 9, in each configuration of the rainwater storage block 10, a reinforcing connector 26B may be provided instead of the reinforcing connector 26. The reinforcing member 27B of the reinforcing connector 26B has a top wall 30A and a pair of second side walls 29B. The top wall 30A protrudes on both sides in the first direction X beyond the top wall 30. Each second side wall 29B extends from a middle portion in the second direction Y at both ends in the first direction X of the top wall 30 toward the second side Z2. A fitting portion 34 (not shown) is fixed to an end of the second side wall 29B on the second side Z2.

[0043] The rainwater storage blocks 10C and 10D of the modified examples can also achieve the same effects as the rainwater storage block 10 of the present embodiment.

[0044] As in a rainwater storage block 10E of a third modified example shown in Fig. 10, in each configuration of the rainwater storage block 10, a reinforcing connector 26C may be provided instead of the reinforcing connector 26. The reinforcing member 27C of the reinforcing connector 26C spans and covers a plurality of peaks 17 (two in the third modified example). In the rainwater storage block 10E of the third modified example, the main body 11 can be reinforced by the reinforcing member 27C that covers the multiple peaks 17 across each other.

[0045] The shape of the peaks is not limited. As in a fourth modified example shown in FIG. 11, the peak portion 17A may be formed in a rectangular tubular shape that is open on the second side Z2 and the first side Z1. As in the case of the peak portion 17B of the fifth modified example shown in Figure 12, in addition to each configuration of the peak portion 17, a recess 65 recessed toward the inside of the peak portion 17B may be formed at the connection portion between the first side wall 18 and the second side wall 19. As in a sixth modified example shown in FIG. 13, the peak portion 17C may be formed in a truncated conical dome shape that is open on the second side Z2.

[0046] The modified peaks 17A, 17B, and 17C can also provide the same effect as the peak 17.

[0047] Second embodiment Next, a second embodiment of the present invention will be described with reference to Figs. 14 to 19. The same components as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in FIGS. 14 and 15, a rainwater storage block 70 of this embodiment has a reinforcing unit 71 instead of the reinforcing connector 26 in each configuration of the rainwater storage block 10.

[0048] The reinforcing unit 71 has a reinforcing member 72 and fitting portions 73 and 74 . The reinforcing member 72 is a second peak. For example, the reinforcing member 72 is formed in a quadrangular pyramid shape. The reinforcing member 72 protrudes from the plate-like body 12 toward the first side Z1. As the reinforcing member 72 moves away from the plate-like body 12, the length of the reinforcing member 72 in the first direction X and the length of the reinforcing member 72 in the second direction Y gradually decrease. The height (length in the thickness direction Z) of the reinforcing member 72 is equal to the height of the peaks 17. The reinforcing member 72 is disposed between a pair of peaks 17 adjacent to each other in the first direction X and the second direction Y (along the main surface 12c of the plate-like body 12). The length of the reinforcing member 72 in the second direction Y is longer than the length of the reinforcing member 72 in the first direction X. The external shape of the reinforcing member 72 is the same as the external shape of the peak portion 17. When viewed in the thickness direction Z, the reinforcing member 72 is disposed so as to be rotated 90° relative to the peak portion 17.

[0049] For example, the fitting portions 73, 74 are formed in a rectangular parallelepiped shape. The fitting portions 73, 74 are arranged side by side in the second direction Y and fixed to the surface of the reinforcing member 72 facing the second side Z2. The fitting parts 73, 74 are attached to the main body 11 by, for example, sandwiching the first belt-shaped member 13 of the plate-shaped body 12 in the second direction Y between the fitting parts 73, 74. The reinforcing unit 71 is detachable from the plate-shaped body 12 .

[0050] As described above, the rainwater storage block 70 of this embodiment can provide a rainwater storage block that has sufficient strength. Furthermore, the reinforcing member 72 protrudes from the plate-like body 12 toward the first side Z1. Therefore, for example, an external force acting on the peak portion 17 from the first side Z1 toward the second side Z2 is transmitted to the plate-like body 12 not only through the peak portion 17 but also through the reinforcing member 72. Therefore, the peak portion 17 is less likely to be damaged by the external force, and the main body 11 can be reinforced. The reinforcing member 72 may be disposed between a pair of peaks 17 adjacent to each other in the first direction X. In this case, an external force acting between the pair of peaks 17 can be transmitted to the plate-like body 12 via the reinforcing member 72.

[0051] The reinforcing member 72 may be disposed between a pair of adjacent peaks 17 in the first direction X and the second direction Y.

[0052] The configuration of the rainwater storage block 70 of this embodiment can be modified in various ways as described below. In a rainwater storage block 70A of a first modification shown in FIGS. 16 and 17, in each configuration of the rainwater storage block 70 of this embodiment, the length of the reinforcing member 72A in the first direction X is longer than the length of the reinforcing member 72 in the second direction Y. The external shape of the reinforcing member 72A is the same as the external shape of the peak portion 17, and when viewed in the thickness direction Z, the reinforcing member 72A is disposed in the same direction as the peak portion 17.

[0053] 18 and 19, a rainwater storage block 70B of a second modified example has a reinforcing unit 71B instead of the reinforcing unit 71 in each configuration of the rainwater storage block 70 of this embodiment. The reinforcing unit 71B has a reinforcing member 76 instead of the reinforcing member 72 in each configuration of the reinforcing unit 71. The outer shape of the reinforcing member 76 is different from the outer shape of the peak portion 17. The reinforcing member 76 is formed in a rod shape extending in the thickness direction Z. The height of the reinforcing member 76 is equal to the height of the peak portion 17.

[0054] The rainwater storage blocks 70A and 70B of the modified examples can also achieve the same effects as the rainwater storage block 70 of the present embodiment.

[0055] Although the first and second embodiments of the present invention have been described above in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. [Explanation of symbols]

[0056] 10,10C,10D,10E,70,70A, Rainwater storage block 11 Main unit 12 Plate-shaped body 17, 17A, 17B, 17C Mountain 18a,19a side 20a end face 27, 27A, 27B, 27C, 72, 72A, Reinforcing members Z thickness direction Z1 Side 1

Claims

1. a main body having a plate-like body and a ridge portion protruding from the plate-like body toward a first side in a thickness direction of the plate-like body; A reinforcing member attachable to the main body; A rainwater storage block comprising:

2. The rainwater storage block according to claim 1 , wherein the reinforcing member is attachable to the plate-like body and covers at least a portion of the ridge portion.

3. The rainwater storage block according to claim 2 , wherein the reinforcing member covers an end surface of the peak portion on the first side in the thickness direction.

4. The rainwater storage block according to claim 2 or 3, wherein the reinforcing member covers at least a part of a lateral surface of the peak portion in the thickness direction.

5. The main body has a plurality of the peaks, The rainwater storage block according to claim 2 , wherein the reinforcing member covers across the plurality of ridges.

6. The rainwater storage block according to claim 1 , wherein the reinforcing member protrudes from the plate-like body toward the first side in the thickness direction.

7. The main body has a plurality of the peaks, The rainwater storage block according to claim 6 , wherein the reinforcing member is disposed between a pair of adjacent ridges along a main surface of the plate-like body.

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