JP7569263B2 - Drain unit - Google Patents

Description

An embodiment of the present invention relates to a drainage unit.

For example, a drainage ditch unit is provided on the shoulder of a road, that is, between the road surface and a concrete wall provided at the end of the road in the width direction. The drainage ditch unit is provided along the longitudinal direction of the road shoulder, and mainly collects rainwater that accumulates on the road surface due to rainfall, and drains the rainwater outside the road.

Conventionally, such a drainage groove unit is composed of a water channel forming member that forms the water channel portion and a cover member that covers the water channel portion. An opening is formed in the cover member to guide rainwater to the water channel portion. However, in the conventional configuration, in addition to rainwater, sunlight enters from the opening into the space formed between the water channel forming member and the cover member. The sunlight that passes through the opening and is irradiated onto the water channel portion promotes the growth of weeds in the water channel portion. Furthermore, the grown weeds obstruct the flow of water in the water channel portion, resulting in a decrease in the drainage capacity of the drainage unit. Therefore, conventionally, in such drainage groove units, how to suppress the growth of weeds in the water channel portion has been an issue.

JP 2019-39198 A

The present invention was made in consideration of the above circumstances, and its purpose is to provide a drainage ditch unit that can suppress the growth of weeds in the water channel without compromising assembly workability.

The drainage groove unit of the embodiment includes a water channel forming member that forms a water channel portion through which water flows, and a cover member that is attached to the water channel forming member and forms a space including the water channel portion between the cover member and the water channel forming member. The cover member has a receiving portion that receives water flowing from the road surface and a wall portion connected at an angle to the receiving portion, and the wall portion has an opening that is formed through the wall portion, communicates the inside and outside of the space, and is arranged adjacent to the receiving portion, and the receiving portion extends from the outside of the space to the inside of the space across the opening.

FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a drainage groove unit according to an embodiment; FIG. 1 is a front view of an example of a drainage groove unit according to an embodiment. FIG. 1 is a top view of an example of a drainage groove unit according to an embodiment. FIG. 1 is a perspective view showing an example of a water channel forming member and a cover member of a drainage groove unit according to an embodiment;

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The drainage ditch unit 1 shown in FIG. 1 is provided, for example, on the shoulder side or median side of a road, and serves as both a curb and a drainage ditch. For example, water accumulated on the road surface due to rainfall or the like flows into the drainage ditch unit 1. In this embodiment, the side of the drainage ditch unit 1 facing the road surface 51 may be referred to as the road surface side, and the side of the drainage ditch unit 1 opposite the road surface 51 may be referred to as the road edge side. For example, when the drainage ditch unit 1 is provided on both the shoulder side and the median side of the road, the road edge side of each drainage ditch unit 1 is the shoulder side and the median side of the road surface 51, respectively.

As shown in FIG. 2, the drainage groove unit 1 is formed in an elongated shape along the longitudinal direction of the road as a whole, and is usually used by connecting a plurality of units. In the following description, the direction perpendicular to the longitudinal direction of the drainage groove unit 1, i.e., the width direction of the road in the drainage groove unit 1, may be referred to as the width direction of the drainage groove unit 1. As shown in FIG. 1, the drainage groove unit 1 includes a water channel forming member 10 and a cover member 20. The water channel forming member 10 and the cover member 20 are formed by bending or welding a metal plate material such as steel or stainless steel. The water channel forming member 10 and the cover member 20 may be surface-treated by plating or the like. In the following description, the cover member 20 side of the water channel forming member 10 is the upper side of the drainage groove unit 1, and the opposite side of the cover member 20 of the water channel forming member 10 is the lower side of the drainage groove unit 1.

The waterway forming member 10 is formed, for example, in an elongated shape along the longitudinal direction of the road as a whole, and has a cross section that is approximately J-shaped or approximately J-shaped with the left and right reversed. As shown in FIG. 1, the waterway forming member 10 is provided, for example, between the road surface 51 and a concrete wall 52 that constitutes a road parapet or median strip provided at the end of the road in the width direction, and is fixed to the wall 52 by a connecting member such as a buried anchor (not shown). Also, for example, when the drainage ditch unit 1 is installed, the bottom of the waterway forming member 10 is located below the road surface 51.

As shown in FIG. 1 etc., the water channel forming member 10 has a water channel portion 11, a back portion 12, a rising portion 13, and a rib 14. The water channel portion 11 is formed inside the water channel forming member 10 along the longitudinal direction of the water channel forming member 10. The water channel portion 11 is formed in the shape of a groove that is open upward by the back portion 12 and the rising portion 13 that form both edges of the water channel portion 11, and drains rainwater that flows into the drainage groove unit 1.

The back portion 12 is provided so as to rise upward at a substantially right angle from one end in the width direction of the waterway forming member 10 (in this case, the edge of the waterway portion 11 on the road end side). In this case, the back portion 12 is configured to be substantially parallel to the wall surface of the wall 52.

The rising portion 13 is provided to rise upward at a substantially right angle from the other end in the width direction of the waterway forming member 10 (in this case the edge of the waterway portion 11 on the road surface side). As shown in FIG. 1, for example, when the drainage groove unit 1 is installed, the upper end of the rising portion 13 is configured to be located at substantially the same height as the road surface 51 or slightly below the road surface 51. The back portion 12 and the rising portion 13 are configured to be substantially perpendicular to the road surface 51, and form a wall that is substantially perpendicular to the road surface 51. In this case, the back portion 12 and the rising portion 13 are configured to be substantially parallel to each other.

As shown in Figures 1 and 2, the ribs 14 are provided in the vertical center of the back 12, and are arranged at equal intervals along the longitudinal direction of the water channel forming member 10, with a plurality of ribs (three in this case). The ribs 14 protrude from the back 12 toward the inside of the water channel forming member 10, i.e., toward the road surface side. When the water channel forming member 10 is viewed from the front, the ribs 14 have a shape resembling an upside-down L-shape.

As shown in FIG. 1, the cover member 20 is removably attached to the water channel forming member 10 so as to cover the upper part of the water channel portion 11 of the water channel forming member 10. The cover member 20 is formed in an elongated shape along the longitudinal direction of the water channel forming member 10. As shown in FIG. 1, the cover member 20 forms a space 31 including the water channel portion 11 between itself and the water channel forming member 10.

The cover member 20 has a receiving portion 21, a wall portion 22, a hole portion 23, a rib 24, a reflecting member 25, and an opening 26. As shown in Figs. 1 and 3, the receiving portion 21 is located above the bottom of the water channel forming member 10, is approximately parallel to the water channel portion 11 and the road surface 51, and is configured to be approximately flush with the road surface 51. The receiving portion 21 receives water flowing from the road surface 51. As shown in Fig. 3, the receiving portion 21 is configured of a flat member that does not have a hole or a notch that connects the inside and outside of the space 31. In other words, the receiving portion 21 does not have a hole or a notch for guiding rainwater, sunlight, etc. to the space 31. As shown in Fig. 1, the end portion 211 of the receiving portion 21 in the space 31 is separated from the water channel forming member 10. That is, a gap C is formed between the end 211 of the receiving portion 21 and the back portion 12 of the water channel forming member 10 that faces the end 211.

As shown in FIG. 1, the wall portion 22 is located above the receiving portion 21, is elongated along the longitudinal direction of the cover member 20, and has a cross section formed in a substantially L-shape. The wall portion 22 has an inclined wall portion 221 and an upright portion 222. As shown in FIG. 1, the inclined wall portion 221 is formed to be inclined downward from the road end side toward the road surface side. One end of the upright portion 222 is connected to the inclined wall portion 221, and the other end is connected to the receiving portion 21 at an angle. In this case, the upright portion 222 is connected to the receiving portion 21 at a substantially right angle, closer to the road end side than the center part in the extension direction of the receiving portion 21.

The end of the standing portion 222 is welded or otherwise attached to the receiving portion 21, thereby undetachably integrating the wall portion 22 and the receiving portion 21. Here, "integrated" means that the wall portion 22 and the receiving portion 21 are joined to each other so that their relative positions and angles do not easily change and they can be handled as a single member. Note that the receiving portion 21 and the standing portion 222 can be connected at a specified angle other than a straight line, not limited to a substantially right angle. The entire wall portion 22 may be configured to be substantially perpendicular to the receiving portion 21.

The hole 23 is formed, for example, in an oval shape, as shown in Figs. 2 and 3. The hole 23 is provided on the upper side of the inclined wall 221 and near both ends of the inclined wall 221 in the longitudinal direction. For example, rainwater from rainfall is introduced into the space 31 through the hole 23. The rib 24 is provided at a position corresponding to the rib 14 of the water channel forming member 10, as shown in Figs. 1 and 2. The rib 24 is for reinforcing the cover member 20 and for positioning the cover member 20 relative to the water channel forming member 10. The rib 24 is formed in a plate shape having a vertical surface and protrudes toward the back 12 of the water channel forming member 10.

The rib 24 is configured to be able to come into contact with the back 12, the rib 14 of the water channel forming member 10, and the receiving portion 21. When the rib 24 comes into contact with the back 12, movement of the cover member 20 towards the back 12 side, i.e., the end side of the road, is restricted. In addition, when the rib 24 comes into contact with the rib 14 and the receiving portion 21, downward movement of the cover member 20 is restricted. In this way, when the rib 24 comes into contact with the back 12, the rib 14, and the receiving portion 21, the position of the cover member 20 relative to the water channel forming member 10 is determined.

2 and 3, the ribs 24 located near both ends of the wall 22 in the longitudinal direction are adjacent to the holes 23. In the following description, the ribs 24 adjacent to the holes 23 are referred to as end ribs 241, and the ribs between the end ribs 241 are referred to as center ribs 242. The reflective members 25 are provided on the end ribs 241. In contrast, the center rib 242 does not have the reflective member 25. The reflective member 25 is attached to the surface of the end rib 241 adjacent to the hole 23, for example, by adhesive. The reflective member 25 reflects light incident from the hole 23 and radiates it from the hole 23 to the outside. That is, the light incident from the hole 23 is reflected by the reflective member 25 provided on the end rib 241 and radiated to the outside through the hole 23.

The opening 26 connects the inside and outside of the space 31. As shown in Figs. 2 and 4, the opening 26 is formed by penetrating the wall 22 in a rectangular shape. Specifically, the opening 26 is formed by cutting out the lower end of the wall 22, in this case the upright portion 222, and the boundary between the upright portion 222 and the inclined wall portion 221. A plurality of openings 26 (in this case six openings) are provided along the longitudinal direction of the wall 22. The spacing between the multiple openings 26 may be equal or unequal. For example, water that flows from the road surface 51 into the receiving portion 21 passes through the openings 26 into the space 31, as shown by the arrow in Fig. 1, and is then guided to the water channel portion 11 through the gap C.

In this embodiment, the opening 26 is disposed adjacent to the receiving portion 21, as shown in FIG. 1 etc. In other words, the receiving portion 21 extends from the outside of the space 31 to the inside of the space 31 across the opening 26. In this case, the receiving portion 21 has an extension portion 212, as also shown in FIG. 1 and FIG. 4. The extension portion 212 is formed by extending continuously from the receiving portion 21 toward the back portion 12 of the water channel forming member 10, i.e., the end side of the road. The extension portion 212 is intended to block sunlight entering the space 31 from the opening 26 from directly irradiating the water channel portion 11.

This allows the receiving portion 21 to efficiently prevent sunlight entering the space 31 from the opening 26 from being directly irradiated onto the waterway portion 11. Here, the length dimension L of the extension portion 212 relative to the height dimension H of the opening 26 when viewed in the width direction of the drainage groove unit 1 will be considered below, using the solar altitude at noon, that is, the incident angle θ of sunlight irradiated from the opening 26, as the standard for the amount of sunlight. In considering that the length of the extension portion 212 is set to a certain width, the reference latitude is set to about 36 degrees north of Tokyo, and calculations are performed using simplified values rather than strict calculations including decimal points. The lower limit value of the length dimension L of the extension portion 212 is calculated to be about 0.2 times the height dimension H of the opening 26 based on the solar noon altitude of about 78 degrees at the summer solstice, when the solar noon altitude is the highest. On the other hand, the upper limit of the length dimension L of the extension section 212 is calculated to be approximately 1.6 times the height dimension H of the opening 26, based on the sun's lowest meridian altitude of approximately 32 degrees on the winter solstice.

Considering the welding allowance between the wall 22 and the receiving portion 21 on the product, it is preferable that the specific range of the length dimension L of the extension portion 212 is from the intermediate value between the above-mentioned lower limit value and the upper limit value to the upper limit value, that is, about 0.7 to about 1.6 times the height dimension H of the opening 26. In this way, it is possible to prevent direct irradiation of sunlight from the opening 26 to the water channel portion 11 at least at the meridian altitude of the sun on the summer solstice. The length dimension L of the extension portion 212 when viewed in the width direction of the drainage groove unit 1 can be set to be longer than the height dimension H of the opening 26. In this embodiment, the length dimension L of the extension portion 212 is set to about 1.6 times the height dimension H of the opening 26 as shown in FIG. 1. This allows the extension portion 212 to fully block sunlight entering the space 31 from the opening 26.

According to the embodiment described above, the drainage groove unit 1 includes a water channel forming member 10 and a cover member 20. The water channel forming member 10 forms a water channel portion 11 through which water flows. The cover member 20 is attached to the water channel forming member 10 to form a space 31 including the water channel portion 11 between the cover member 20 and the water channel forming member 10. The cover member 20 also has a receiving portion 21 and a wall portion 22. The receiving portion 21 receives water flowing from the road surface 51. The wall portion 22 is connected to the receiving portion 21 at an angle. The wall portion 22 has an opening portion 26 formed through the wall portion 22, which communicates the inside and outside of the space 31 and is arranged adjacent to the receiving portion 21. The receiving portion 21 extends from the outside of the space 31 to the inside of the space 31 across the opening portion 26.

As a result, the light irradiated from the opening 26 to the water channel portion 11 is blocked by the receiving portion 21, so that the growth of weeds in the water channel portion 11 can be suppressed. As a result, the flow of water in the water channel portion 11 is not hindered by weeds, and water can be drained smoothly. Furthermore, the receiving portion 21 is structured to serve both the function of directing water flowing from the road surface 51 to the water channel portion 11 and the function of blocking light from the water channel portion 11, which eliminates the need to place a separate part in the drainage groove unit 1 for blocking light from the water channel portion 11. This reduces the number of parts and improves the assembly workability of the drainage groove unit 1. As a result, the manufacturing cost of the drainage groove unit 1 can be reduced.

In addition, the end 211 of the receiving portion 21 in the space 31 is separated from the water channel forming member 10. This allows water to be introduced into the water channel portion 11 through the gap formed between the end 211 of the receiving portion 21 and the water channel forming member 10. As a result, the drainage groove unit 1 can lead water accumulated on the road surface 51 from the receiving portion 21 to the water channel portion 11 with a simple structure. This allows the manufacturing cost of the drainage groove unit 1 to be reduced.

Furthermore, the opening 26 is formed by cutting out the lower end of the wall portion 22. This improves the workability of forming the opening 26, thereby reducing the manufacturing cost of the drainage groove unit 1. Also, by forming the opening 26, through which the water that has flowed through the receiving portion 21 passes, only in the wall portion 22, the structure can be simplified.

The receiving portion 21 is also made of a flat member that does not have any holes or notches that connect the inside and outside of the space 31. This simplifies the structure and reduces manufacturing costs, such as processing labor, by not providing holes or the like in the receiving portion 21 for introducing water into the water channel portion 11.

The above describes an embodiment of the present invention, but this embodiment is not limited to the aspects described above and shown in the drawings, and various modifications and extensions can be made without departing from the spirit of the invention.

1 indicates the drainage groove unit, 10 indicates the water channel forming member, 20 indicates the cover member, 21 indicates the receiving portion, 211 indicates the end portion, 22 indicates the wall portion, 26 indicates the opening portion, and 31 indicates the space.

Claims (4)

A water channel forming member that forms a water channel portion through which water flows;
a cover member attached to the water channel forming member to form a space including the water channel portion between the cover member and the water channel forming member,
The cover member is
A receiving portion for receiving water flowing from the road surface;
a wall portion connected to the receiving portion at an angle;
the wall portion has an opening formed through the wall portion, communicating the inside and the outside of the space, and disposed adjacent to the receiving portion;
The receiving portion extends from the outside of the space to the inside of the space across the opening.
Drain unit. An end of the receiving portion in the space is spaced apart from the water channel forming member.
2. The gutter unit according to claim 1. The opening is formed by cutting out a lower end portion of the wall portion.
A gutter unit according to claim 1 or 2. The receiving portion is composed of a flat member having no hole or notch communicating the inside and the outside of the space.
A gutter unit according to any one of claims 1 to 3.

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