Rainwater basin cover

Abstract

To provide a rainwater basin cover capable of adjusting the amount of rainwater flowing into a rain garden and promptly draining rainwater into a rainwater pipe when a storage capacity of the rain garden is exceeded.SOLUTION: The present disclosure provides a rectangular rainwater basin cover 10 arranged along a curbstone 17 on a roadside, the rainwater basin cover 10 comprising a first area 12 as a road-side area and a second area 14 as a curb-side area, the first area 12 including a first opening 15 having at least one opening, the second area 14 having one end A, a central part B, and the other end C in a traveling direction X of a road 11. At least the one end A and the other end C among the one end A, the central part B, and the other end C have no opening.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a rainwater inlet cover.

Background Art

[0002] In recent years, rain gardens (also referred to as rain gardens) have attracted attention as green infrastructure. A rain garden refers to a planting space having a structure that temporarily stores rainwater that has fallen on the ground and slowly infiltrates it into the ground without directly discharging it into a rainwater pipe or the like. For example, there is known a rain garden in which gravel is spread on an excavated area beside a road or a sidewalk so as to harmonize with surrounding buildings, and rainwater is guided to the gravel and infiltrated into the ground. Rainwater on the road is guided to a dedicated inlet newly provided on the curb beside the road or from a rainwater inlet to the rain garden. When a new rain garden is established according to a new urban plan, a dedicated inlet can be provided from the road in consideration of the overall harmony and the rainfall amount in each region. On the other hand, as a rainwater inlet cover for efficiently introducing rainwater into the rainwater inlet, the one described in Patent Document 1 has been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When directly introducing rainwater from beside the road into the rain garden, if the rainfall amount is large, the amount of rainwater flowing into the rain garden may be too large, exceeding the water storage capacity of the rain garden, and there is a concern of backflow to the road side. The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a rainwater inlet cover capable of adjusting the amount of rainwater flowing into the rain garden and promptly flowing rainwater into the rainwater pipe when the water storage amount of the rain garden is exceeded.

Means for Solving the Problems

[0005] As a result of intensive studies, the inventor of the present invention has found that by setting the opening position of the rainwater inlet cover to a specific position, it is possible to adjust the amount of rainwater flowing into the rain garden, leading to the present disclosure.

[0006] That is, the present disclosure is a rectangular rainwater inlet cover arranged along the curb on the side of the road. The rainwater inlet cover has a first area that is a road-side area and a second area that is a curb-side area. The first area is provided with a first opening portion having at least one opening, and the second area has one end portion, a central portion, and the other end portion along the traveling direction of the road. At least one of the one end portion, the central portion, and the other end portion does not have an opening.

[0007] The second area preferably includes a second opening portion having at least one opening at the central portion.

[0008] The second area preferably has no opening.

[0009] The first opening portion is preferably a grating.

[0010] Another aspect of the present disclosure is a rectangular rainwater inlet cover arranged along the curb on the side of the road. The rainwater inlet cover includes a grating, and on the curb side of the grating, there is a rainwater inflow amount adjustment plate that covers the surface of the grating. The rainwater inflow amount adjustment plate has a plate made of a material with a specific gravity smaller than that of water and a locking portion attached to the back surface of the plate.

Advantages of the Invention

[0011] According to the rainwater inlet cover of the present disclosure, it is possible to adjust the amount of rainwater flowing into the rain garden and promptly drain the rainwater into the rainwater pipe when the water storage amount in the rain garden is exceeded.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0014] [Rainwater Inlet Cover] The rainwater inlet cover 10 of this embodiment covers the upper opening of the rainwater inlet. As shown in FIG. 1, it is a rectangular rainwater inlet cover 10 arranged along the curb 17 on the side of the road 11. The rainwater inlet cover 10 has a first region 12 which is the area on the road 11 side and a second region 14 which is the area on the curb 17 side. The first region 12 is provided with a first opening 15 having at least one opening. The second region 14 has one end A, a central part B, and the other end C along the traveling direction X of the road 11. At least one of the one end A and the other end C among the one end A, the central part B, and the other end C has no opening. Hereinafter, a specific description will be given.

[0015] Normally, a curb 17 is provided at the end of the road 11 to indicate the boundary with the sidewalk or green space 13 or to introduce the rainwater on the road 11 into the rainwater inlet. In the present disclosure, the "curb on the side of the road" means not only the curb 17 but also a structure that causes a step between the road 11 and the area on the side of the road 11 and has a water collection effect.

[0016] The rainwater inlet cover 10 is square or rectangular. The size of the rainwater inlet cover 10 is not particularly limited. Generally, the traveling direction (X) of the road 11 is 600 mm or more and 700 mm or less, and the width direction (Y) of the road 11 is 300 mm or more and 400 mm or less.

[0017] The material of the rainwater inlet cover 10 may be any material with a specific gravity greater than that of water, and examples thereof include concrete, SUS, iron, etc. Although the thickness of the rainwater inlet cover 10 depends on the material, it is preferably 20 mm or more and 60 mm or less.

[0018] (First Region) The first region 12 is the road-side region of the rainwater inlet cover 10, and represents a region that is 20% or more and 80% or less of the length of the rainwater inlet cover 10 in the Y direction. A region of 30% or more and 50% or less is preferable, and a region of 50% is particularly preferable. The first region 12 includes a first opening 15 having at least one opening. The first opening 15 introduces the collected rainwater to a rainwater inlet provided below the rainwater inlet cover 10. The rainwater introduced into the rainwater inlet flows into a rainwater pipe. In this embodiment, the material of the rainwater inlet cover 10 itself is a concrete plate, and the first opening 15 is a metal grating, so-called grating. In this case, it can be manufactured by providing an opening in the concrete plate and providing a step inside the opening to support the grating. In this embodiment, the first opening 15 is a grating having a plurality of openings, but it is not limited thereto, and it may be a form in which at least one opening is provided in the concrete plate. Also, the shapes of the plurality of openings can be selected from various shapes such as circular, elliptical, triangular, rectangular, etc.

[0019] (Second Region) The second region 14 is the region on the side of the curb 17 of the rainwater inlet cover 10, and is preferably 20% or more and 80% or less of the length of the rainwater inlet cover 10 in the Y direction. A region of 30% or more and 50% or less is preferable, and a region of 50% is particularly preferable. In this embodiment, the second region 14 is provided with a second opening 16 having at least one opening at the central portion B. In this embodiment, the second opening 16, like the first opening 15, introduces the collected rainwater to the rainwater inlet. Then, the rainwater introduced into the rainwater inlet flows into a rainwater pipe. Also, the shape of the second opening 16 can be selected from various shapes such as circular, elliptical, triangular, rectangular, etc., similar to the first opening 15.

[0020] (One end, central part, the other end) In the second region 14 of the rainwater gutter cover 10, at least one end A and the other end C among the one end A, the central part B, and the other end C do not have openings. Since the road 11 has a downward gradient from the center of the road 11 towards the curb 17, rainwater flows from the road 11 towards the curb 17. By not having openings at the one end A and the other end C, the rainwater collected by the curb 17 flows over these surfaces and flows into the adjacent green space 13 and the rain garden 18 provided in the green space 13. On the other hand, when there is a large amount of rainwater, since the rainwater flows into the rainwater gutter from the first opening 15 and the second opening 16, the amount of rainwater flowing into the rain garden 18 can be adjusted. Also, when it rains more than the water storage capacity of the rain garden 18, the water flowing back can be promptly discharged into the rainwater gutter.

[0021] The total length of the one end A, the central part B, and the other end C occupies 100% of the length of the rainwater gutter cover 10 in the X direction. Preferably, the one end A is 30% or more and 40% or less of the length of the rainwater gutter cover 10 in the X direction, the central part B is preferably 20% or more and 40% or less of the length in the X direction, and the other end C is preferably 30% or more and 40% or less in the X direction.

[0022] Conventionally, as a method of introducing rainwater into a rain garden, there are those with an opening provided in the curb so as to directly introduce rainwater from the road into the rain garden, or those with a wide introduction path. However, with this structure, when a large amount of rain falls, rainwater exceeding the water permeability of the rain garden flows into the rain garden, making it difficult to adjust the inflow amount into the rain garden. By providing the rainwater gutter cover 10 of the present embodiment adjacent to the rain garden 18, the amount of rainwater flowing into the rain garden 18 can be automatically adjusted. Therefore, it is suitable not only when newly installing the rain garden 18 but also when installing a rain garden that makes use of the natural terrain and existing green spaces. The introduction of rainwater into the rain garden 18 can effectively guide the rainwater into the rain garden 18 by making the green space 13 lower than the level of the road 11.

[0023] The rainwater inlet cover of the present disclosure may be in a form without an opening in the second region 14, like the rainwater inlet cover 20 in FIG. 2. That is, in addition to one end A and the other end C, the central portion B also has no opening. This embodiment is a preferred form in an area with relatively little rainfall or when there is little rainwater collected due to the road configuration. In the present disclosure, the opening areas of the first opening 15 and the second opening 16 of the rainwater inlet cover 20 can be selected in consideration of the weather in the area where the rain garden 18 is constructed, the annual rainfall, the water permeability of the rain garden 18, and the like.

[0024] Here, the rainwater inlet cover 10 of the present disclosure is used with the curb 17 removed. The curb 17 may be removed and the underlying soil may be left exposed, but as shown in FIG. 3, it may also be a rainwater inlet cover 30 provided with an extension 19 extending the second region 14 only in the portion corresponding to the region where the curb 17 is removed. When newly installing a rain garden in accordance with urban planning, such a rainwater inlet cover 30 has the advantages of efficient construction and excellent appearance. The material of the extension 19 can be the same as that of the second region 14, so that it can be easily manufactured and installed.

[0025] In the above embodiment, the first region 12 and the second region 14 are provided in one concrete plate, but in the present disclosure, the rainwater inlet cover may be in a form in which the first region 12 and the second region 14 are provided in separate concrete plates.

[0026] Also, as shown in FIG. 4, the rainwater inlet cover 40 of another embodiment of the present disclosure includes a grating 45 and has a rainwater inflow rate adjustment plate 48 covering the surface of the grating 45 on the side of the curb 17. The rainwater inflow rate adjustment plate 48 has a plate 49 made of a material with a specific gravity smaller than that of water and a locking portion 50 attached to the back surface of the plate 49.

[0027] In the rainwater inlet cover 40, in the case of a small amount of rainwater, as shown in Fig. 5(a), the rainwater flows from above the rainwater inflow adjustment plate 48 into the rain garden 18. On the other hand, when a large amount of rainwater flows to the edge of the road 11, part of it flows over the rainwater inflow adjustment plate 48 and enters the rain garden 18, and part of it enters the rainwater inlet from the grating 45 at the part not covered by the rainwater inflow adjustment plate 48. When the road 11 is flooded due to an even larger amount of rainwater, as shown in Fig. 5(b), the rainwater inflow adjustment plate 48 floats due to the large amount of rainwater, and rainwater flows into the rainwater inlet from between the rainwater inflow adjustment plate 48 and the grating 45. Also, even when the water storage capacity of the rain garden 18 is exceeded, the overflowing rainwater flows from the grating 45 into the rainwater inlet, so the water storage volume of the rain garden 18 can be adjusted before the sediment in the rain garden 18 flows.

[0028] Since the rainwater inflow adjustment plate 48 has a locking portion 50 on its back surface, it will not come off from the grating 45 when the road 11 is flooded. The shape of the locking portion 50 is not particularly limited as long as it is a shape through which the locking portion 50 cannot pass through the opening of the grating 45, and examples include a circular plate, an elliptical plate, a spherical shape, a rectangular plate, etc.

[0029] As the material of the rainwater inflow adjustment plate 48, it is preferable that both the plate 49 and the locking portion 50 are resins with a specific gravity smaller than that of water, and examples of the resin include polypropylene, polyethylene, etc. The thickness of the plate 49 is not particularly limited, but considering that it does not interfere with passage and the strength against the weight of people and vehicles, etc., it is preferably 3 mm or more and 30 mm or less, and more preferably 3.5 mm or more and 10 mm or less.

[0030] By using the rainwater inlet cover of the present disclosure, it is easy to introduce rainwater into the rain garden, and the inflow amount can also be adjusted, so the installation of rain gardens that make use of existing green spaces can be increased.

Explanation of reference numerals

[0031] 10, 20, 30, 40 Rainwater inlet cover 11 Road 12 First region 13 Green space 14 Second area 15 First opening (grating) 16 Second opening (grating) 17 Curb 18 Rain court A One end B Central part C The other end 19 Extension part 45 Grating 48 Rainwater inflow adjustment plate 49 Plate 50 Locking part

Claims

1. A rectangular rainwater inlet cover arranged along the curbstone on the side of the road, The rainwater inlet cover has a first region which is a road-side region and a second region which is a curbstone-side region, The first region is provided with a first opening portion having at least one opening, The second region has one end portion, a central portion, and the other end portion along the traveling direction of the road. At least the one end portion and the other end portion of the one end portion, the central portion, and the other end portion are rainwater inlet covers without openings.

2. The rainwater inlet cover according to claim 1, wherein the second region is provided with a second opening portion having at least one opening at the central portion.

3. The rainwater inlet cover according to claim 1, wherein the second region has no opening.

4. The rainwater inlet cover according to claim 1, wherein the first opening portion is a grating.

5. A rectangular rainwater inlet cover arranged along the curbstone on the side of the road, The rainwater inlet cover is provided with a grating, A rainwater inflow amount adjusting plate covering the surface of the grating is provided on the curbstone side of the grating, The rainwater inflow amount adjusting plate has a plate made of a material with a specific gravity smaller than that of water and a locking portion attached to the back surface of the plate.

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