Drainage unit

Abstract

To provide a drain ditch unit capable of simultaneously ensuring slip resistance of an automobile and the like and drainage performance of rainwater and the like.SOLUTION: A metallic drain ditch unit 1 comprises: a flowing water plate 2 with a bottom wall part 2a; and a guard plate 3 provided to cover the flowing water plate 2 from above and having a drainage hole 3c penetrating in a depthwise direction, wherein water flowing on a roadway D on a bridge B is configured to be introduced into the interior as drainage through the drainage hole 3c, and is configured to be received by the bottom wall part 2a and allowed to flow in a predetermined drainage flow direction. An upper surface of the guard plate 3 is provided with a first area A1 in which an anti-slip layer L is provided, and a second area A2 in which the anti-slip layer L is not provided, and the second area A2 is configured to connect a peripheral edge R of the guard plate 3 with the drainage hole 3c.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a drainage gutter unit that can be installed on a road.

Background Art

[0002] Conventionally, drainage gutter units installed on the shoulders of roads such as bridges, viaducts, underpasses, tunnels, and streets are known. For example, the drainage gutter unit disclosed in Patent Document 1 includes a flowing water plate in which a water passage is formed, and a guard plate provided so as to cover the flowing water plate from above and having a drainage hole penetrating in the thickness direction. Then, rainwater or the like that has fallen on the driving surface of the road flows toward the shoulder side on the driving surface of the road, and then is introduced into the drainage gutter unit through the drainage hole. The rainwater or the like introduced into the drainage gutter unit flows through the water passage and is then drained from a terminal pipe provided at the end of the water passage into a river, a sewer, or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, when a drainage ditch unit is temporarily installed on a bridge undergoing repair work rather than one that is already open, the top surface of the drainage ditch unit may be temporarily used as a road for cars, motorcycles, bicycles, pedestrians, etc. Since the drainage ditch unit is made of metal such as steel, it has lower slip resistance than the asphalt road surface on which cars, etc. travel. Therefore, there is a concern that if the top surface of the guard plate on the drainage ditch unit is wet due to rain, etc., cars, etc. traveling on the guard plate may be more likely to slip. To address this, it is conceivable to apply a coating that can increase slip resistance to the entire top surface of the guard plate to create an anti-slip layer that can prevent cars, etc. from slipping. However, if an anti-slip layer is provided over the entire top surface of the guard plate, the flow of rainwater, etc. from the periphery of the guard plate to the drainage holes may be obstructed by this anti-slip layer, which may worsen the drainage performance of the drainage ditch unit.

[0005] The present invention has been made in view of the above points, and its objective is to provide a drainage ditch unit that can achieve both slip prevention for automobiles and the like, and ensure drainage performance for rainwater and the like. [Means for solving the problem]

[0006] To achieve the above objective, the present invention is characterized by providing an anti-slip layer while avoiding the area connecting the upper peripheral edge of the guard plate and the drainage hole.

[0007] Specifically, the subject is a metal drainage channel unit comprising a water flow plate having a bottom wall and a guard plate provided to cover the water flow plate from above and having drainage holes penetrating in the thickness direction, configured to introduce water flowing on the road surface into the interior as drainage through the drainage holes, receive it at the bottom wall, and direct it in a predetermined drainage flow direction, and the following solutions were implemented.

[0008] In other words, the first invention is characterized in that the upper surface of the guard plate is provided with a first region on which an anti-slip layer is provided and a second region on which the anti-slip layer is not provided, and the second region is configured to connect the periphery of the guard plate with the drainage hole.

[0009] The second invention is characterized in that, in the first invention, the drainage flow direction of the water flow plate is set to be along the extension direction of the road, and the second region is provided to extend in a direction that intersects the drainage flow direction and in a horizontal direction.

[0010] In the third invention, in the second invention, each of the first region and the second region is provided in multiple units, and the first region and the second region are provided alternately along the drainage flow direction.

[0011] The fourth invention is characterized in that, in the first invention, at least one of the upper surface of the bottom wall and the lower surface of the guard plate is provided with a load transmission part that transmits a load acting on the guard plate from above to the bottom wall.

[0012] The fifth invention is characterized in that, in the fourth invention, the load transmission section is provided along the upper surface of the bottom wall section at predetermined intervals, includes a plurality of ribs that divide the bottom wall section into a first water passage section and a second water passage section, and the drainage hole is provided at a position corresponding to the first water passage section.

[0013] The sixth invention is characterized in that, in the fifth invention, the rib is provided projecting downward from the lower surface of the guard plate.

[0014] The seventh invention is characterized in that, in the fourth invention, the load transmission portion includes a cylindrical support portion that extends in the vertical direction, and the cylindrical support portion is positioned in close proximity to the drain hole. [Effects of the Invention]

[0015] In the first invention, the anti-slip layer provided in the first region on the upper surface of the guard plate increases the resistance to slipping, thereby preventing vehicles from slipping when they pass over the guard plate. Furthermore, since the anti-slip layer is not provided in the second region, which is provided to connect the upper periphery of the guard plate with the drainage hole, rainwater flows more easily than in the first region. In other words, rainwater that reaches the upper periphery of the drainage channel unit from the road surface flows smoothly through the second region on the upper surface of the drainage channel unit to the drainage hole. This prevents deterioration of the drainage performance of the drainage channel unit.

[0016] In the second invention, for example, when a drainage ditch unit is installed on the shoulder of a road in a position where the drainage flow direction and the extension direction of the road are substantially coincide, rainwater and the like from the road surface will flow toward the drainage ditch unit in a direction intersecting the drainage flow direction of the drainage ditch unit and in a horizontal direction. Here, a second region is provided on the upper surface of the guard plate along a direction substantially the same as the direction in which rainwater and the like flows into the drainage ditch unit, so that rainwater and the like from the road surface flows smoothly through the second region to the drainage hole. Therefore, deterioration of the drainage performance of the drainage ditch unit can be prevented.

[0017] In the third invention, the first and second regions are arranged alternately along the drainage flow direction, so that, for example, the second region is not biased towards the upstream or downstream side of the drainage flow direction. This ensures that vehicles and other vehicles do not slip when passing over the drainage channel unit along the drainage flow direction.

[0018] In the fourth invention, for example, even if a truck passes over the guard plate and a relatively large load is applied to the guard plate from above, the load is transmitted to the bottom wall via the load transmission part and can be received by the bottom wall. This prevents the guard plate from deforming.

[0019] In the fifth invention, when rainwater or the like introduced into the first water passage portion through the drain hole flows through between the ribs provided between the first water passage portion and the second water passage portion and into the second water passage portion, dust such as fallen leaves contained in the rainwater or the like is caught by each rib and collected. As a result, it is possible to suppress the entry of dust into the second water passage portion, and it is possible to prevent the drainage performance of the drain unit from deteriorating due to the accumulation of dust in the second water passage portion.

[0020] In the sixth invention, for example, when the guard plate is removed from the drain unit, the ribs partitioning the first water passage portion and the second water passage portion no longer exist on the flowing water plate, so it is possible to prevent the ribs from getting in the way when cleaning the flowing water plate of the drain unit.

[0021] In the seventh invention, for example, when an automobile or the like passes over the guard plate, even if the wheels of the automobile or the like pass over the drain hole, the load of the automobile or the like is transmitted to the bottom wall portion by the round support portion, and the load is received by the bottom wall portion. As a result, it is possible to prevent the peripheral portion of the drain hole in the guard plate from being deformed by the load of the automobile or the like.

Brief Description of the Drawings

[0022] [Figure 1] It is a plan view showing a drain unit according to an embodiment of the present invention. [Figure 2] It is a schematic cross-sectional view taken along line II-II of FIG. 1. [Figure 3] It is a schematic cross-sectional view taken along line III-III of FIG. 1. [Figure 4] It is a schematic cross-sectional view showing a state where a drain unit according to an embodiment of the present invention is installed on a bridge. [Figure 5] It is a schematic cross-sectional view showing a state where a drain unit according to an embodiment of the present invention is temporarily installed on a bridge. [Figure 6] It is a plan view showing an anti-slip layer of a drain unit according to a comparative example. [Figure 7]This is a schematic cross-sectional view showing a drainage ditch unit according to a comparative example installed on a bridge. [Figure 8] This is a plan view showing the anti-slip layer of a drainage channel unit according to an embodiment of the present invention. [Figure 9] This is a schematic cross-sectional view showing a drainage ditch unit according to an embodiment of the present invention installed on a bridge. [Figure 10] This is a schematic cross-sectional view showing a drainage ditch unit according to an embodiment of the present invention temporarily installed on a bridge. [Figure 11] This is a modified version of Figure 8. [Modes for carrying out the invention]

[0023] Embodiments of the present invention will be described in detail below with reference to the drawings. The following description of preferred embodiments is essentially illustrative.

[0024] Figure 1 shows a drainage ditch unit 1 according to an embodiment of the present invention. The drainage ditch unit 1 is a plate type with a flat upper surface and is substantially rectangular in plan view. The drainage ditch unit 1 is installed or temporarily erected on the shoulder of a road, etc., in such a position that its longitudinal direction coincides with the extension direction of the road, such as a bridge. In this embodiment, the longitudinal direction of the drainage ditch unit 1 is simply referred to as the "longitudinal direction," and the horizontal direction intersecting the longitudinal direction is referred to as the "intersecting direction."

[0025] Furthermore, the drainage unit 1 is made of metal, such as steel, and, as shown in Figure 2, comprises a water flow plate 2 having a wide U-shaped cross-section and a guard plate 3 provided to cover the water flow plate 2 from above. The guard plate 3 can be removed from the water flow plate 2.

[0026] The flow plate 2 comprises a bottom wall portion 2a that is roughly plate-shaped with an upper surface extending horizontally, and a first side wall portion 2b and a second side wall portion 2c that protrude upward from each of the intersecting edges of the bottom wall portion 2a.

[0027] A roughly L-shaped first angle 4a is fixed to one side of the first side wall 2b in the direction of intersection. A roughly L-shaped second angle 4b is fixed to the other side of the second side wall 2c in the direction of intersection. The drainage ditch unit 1 is fixed to the shoulder of a road, such as a bridge, by the first angle 4a and the second angle 4b.

[0028] A substantially L-shaped receiving angle 5 is fixed to one side of the second side wall portion 2c in the direction of intersection. The receiving angle 5 is provided with a receiving portion 5a extending in one direction of intersection, and the upper surface of the receiving portion 5a is flat.

[0029] The guard plate 3 is provided with a top wall portion 3a that is roughly plate-shaped and extends horizontally, and a third side wall portion 3b that protrudes downward from one end edge in the direction of intersection of the top wall portion 3a. Furthermore, the third side wall portion 3b on one side in the direction of intersection is supported from below by a bottom wall portion 2a, and the other end in the direction of intersection is supported from below by a receiving portion 5a.

[0030] Multiple drainage holes 3c are provided in the top wall section 3a, penetrating in the thickness direction. These drainage holes 3c have an elongated shape in plan view and are arranged in parallel along the longitudinal direction, as shown in Figure 1. Rainwater flowing on the road surface is introduced into the drainage ditch unit 1 as drainage through the drainage holes 3c and is received by the bottom wall section 2a.

[0031] Furthermore, as shown in Figures 1 and 3, the lower surface of the top wall portion 3a is provided with a plurality of round support portions 3d and a plurality of ribs 3e that protrude downward from the lower surface, that is, extend in the vertical direction. The plurality of round support portions 3d are cylindrical in shape and are arranged in parallel along the longitudinal direction. In addition, some of the round support portions 3d are positioned close to the drainage holes 3c.

[0032] Multiple ribs 3e are provided along the longitudinal direction and along the upper surface of the bottom wall portion 2a at predetermined intervals from one another. These multiple ribs 3e divide the bottom wall portion 2a into a first water passage portion 2d and a second water passage portion 2e provided on the other side in the direction of intersection with the first water passage portion 2d. In this embodiment, the width of the first water passage portion 2d is set to be greater than the width of the second water passage portion 2e.

[0033] A drain hole 3c is provided in the top wall portion 3a at a position corresponding to the first water passage portion 2d, that is, at a position covering the first water passage portion 2d. As a result, rainwater and the like from outside the drainage ditch unit 1 are introduced into the first water passage portion 2d inside the drainage ditch unit 1 via the drain hole 3c.

[0034] Rainwater and other debris introduced into the first waterway section 2d flows through the ribs 3e provided between the first waterway section 2d and the second waterway section 2e, and as it flows into the second waterway section 2e, debris such as fallen leaves contained in the rainwater and other debris are caught and collected by each rib 3e. The rainwater and other debris that flows into the second waterway section 2e then flows in the direction of extension of the second waterway section 2e, that is, in the longitudinal direction, and is drained into a river or sewer through a discharge pipe (not shown) provided at the end of the flow. In this embodiment, the "longitudinal direction" corresponds to the "predetermined drainage flow direction" in the claims.

[0035] Next, an example of a drainage ditch unit 1 being installed on bridge B will be described using Figure 4. Bridge B comprises a roadway D located in the center in a direction intersecting its extension direction, curbs G located on both sides of the roadway D in the aforementioned intersecting direction, and a shoulder S located between the roadway D and the curbs G. The drainage ditch unit 1 is installed on the shoulder S. Furthermore, the upper surface of the roadway D is sloped downwards as it approaches the shoulder S. As a result, rainwater and other liquids flow from the roadway D to the shoulder S, and are then introduced into the drainage ditch unit 1 through the drainage holes 3c for drainage.

[0036] In the example shown in Figure 4, since automobiles and other vehicles normally travel on the roadway D, they only travel over the drainage ditch unit 1 installed on the shoulder S in emergencies (for example, when emergency vehicles such as ambulances travel on the shoulder S).

[0037] On the other hand, in the example shown in Figure 5, where the drainage ditch unit 1 is temporarily installed on bridge B (for example, in the case of repair work on bridge B, or when it is installed on one side of each lane during bridge construction), unlike the example shown in Figure 4, the drainage ditch unit 1 and both sides thereof are set up as roadway D. Therefore, vehicles and other vehicles frequently drive over the drainage ditch unit 1. In this embodiment, the drainage ditch unit 1 that was installed on bridge B is also used when it is temporarily installed during repair work, or when the drainage ditch unit 1 that was temporarily installed during bridge construction work on bridge B is installed on bridge B.

[0038] In the example shown in Figure 5, for example, when a relatively heavy vehicle such as a large truck drives over the drainage unit 1, a relatively large load is applied from above to the top wall portion 3a of the guard plate 3. This load is transmitted from the top wall portion 3a of the guard plate 3 to the bottom wall portion 2a of the water flow plate 2 by the round support portion 3d and the rib 3e, and is received by the bottom wall portion 2a. As a result, even when a large vehicle such as a large truck drives over the drainage unit 1, deformation of the top wall portion 3a of the guard plate 3 due to the load from the driving can be suppressed. In this embodiment, even when the wheels of a large vehicle such as a large truck pass over or around the drainage hole 3c, the load from the driving can be reliably transmitted from the top wall portion 3a to the bottom wall portion 2a by the round support portion 3d which is positioned close to the drainage hole 3c, thereby suppressing deformation of the top wall portion 3a around the drainage hole 3c.

[0039] Next, the anti-slip layer L provided on the upper surface of the top wall portion 3a of the guard plate 3 will be explained using Figures 6 to 10. Note that the anti-slip layer L is omitted in Figure 1 for the sake of explanation.

[0040] The anti-slip layer L is formed by applying a synthetic resin paint (e.g., acrylic paint) or by thermal spraying a thermal spray material (e.g., aluminum and magnesium). As a result, the upper surface of the top wall portion 3a of the guard plate 3 has higher slip resistance than when the anti-slip layer L is not provided. Therefore, it is possible to prevent the wheels of automobiles and other vehicles traveling on the guard plate 3 from slipping. Figures 6 and 7 show comparative examples, and Figures 8 to 10 show this embodiment.

[0041] Here, the anti-slip layer L can increase slip resistance, but it has the characteristic of hindering the flow of liquids such as rainwater. Therefore, as in the comparative example shown in Figure 6, if the anti-slip layer L is provided over the entire upper surface of the top wall 3a, as shown in Figure 7, the flow of rainwater and other liquids from the roadway D to the drainage holes 3c of the guard plate 3 will be hindered by the anti-slip layer L, which may worsen the drainage performance of the drainage ditch unit 1.

[0042] On the other hand, in this embodiment, as shown in Figure 8, the upper surface of the top wall portion 3a of the guard plate 3 is provided with a plurality of first regions A1 on which an anti-slip layer L is provided, and a plurality of second regions A2 on which the anti-slip layer L is not provided. Since the anti-slip layer L is not provided in the second regions A2, rainwater and the like can flow more easily than in the first regions A1. In this embodiment, the area of ​​the first regions A1 is set to be smaller than the area of ​​the second regions A2.

[0043] The first region A1 and the second region A2 are roughly rectangular in shape when viewed from above and are arranged alternately along the longitudinal direction. The second region A2 is provided to extend in both the intersecting and horizontal directions so as to connect the peripheral edges R on both sides of the top wall 3a in the intersecting direction with the drainage holes 3c.

[0044] When the drainage ditch unit 1 is installed on the shoulder S of the bridge B, as shown in Figure 9, rainwater that reaches the peripheral edge R on one side in the intersecting direction of the top wall section 3a from the roadway D will flow smoothly through the second region A2 to the drainage hole 3c. As a result, the drainage performance (water collection performance) of the drainage ditch unit 1 can be improved compared to the comparative example (see Figures 6 and 7) in which an anti-slip layer L is provided over the entire upper surface of the top wall section 3a.

[0045] Furthermore, when the drainage ditch unit 1 is temporarily installed on bridge B, as shown in Figure 10, rainwater and the like that reaching the peripheral edge R on one side and the peripheral edge R on the other side of the top wall portion 3a from both sides in the intersecting direction of the drainage ditch unit 1 will flow smoothly through the second region A2 to the drainage hole 3c. This improves the drainage performance of the drainage ditch unit 1 compared to the comparative example above.

[0046] As described above, according to this embodiment, the anti-slip layer L provided in the first region A1 on the upper surface of the guard plate 3 increases the slip resistance, thus preventing vehicles from slipping when they pass over the guard plate 3. Furthermore, since the anti-slip layer L is not provided in the second region A2, which is provided to connect the upper peripheral edge R of the guard plate 3 with the drainage hole 3c, rainwater flows more easily there than in the first region A1. In other words, rainwater that reaches the upper peripheral edge R of the drainage ditch unit 1 from the roadway D of the bridge B flows smoothly through the second region A2 on the upper surface of the drainage ditch unit 1 to the drainage hole 3c. This prevents deterioration of the drainage performance of the drainage ditch unit 1.

[0047] Furthermore, for example, if the drainage ditch unit 1 is installed on the shoulder S of the bridge B in a position where the drainage flow direction and the extension direction of the bridge B are approximately coincide, rainwater from the roadway D of the bridge B will flow towards the drainage ditch unit 1 in a direction intersecting the drainage flow direction of the drainage ditch unit 1 and in a horizontal direction. Here, a second region A2 is provided on the upper surface of the guard plate 3 along approximately the same direction as the direction in which rainwater flows into the drainage ditch unit 1, so that rainwater from the roadway D of the bridge B flows smoothly through the second region A2 to the drainage hole 3c. Therefore, deterioration of the drainage performance of the drainage ditch unit 1 can be prevented.

[0048] Furthermore, since the first region A1 and the second region A2 are alternately provided along the drainage flow direction, it is possible to prevent, for example, the second region A2 from being biased towards the upstream or downstream side of the drainage flow direction. This ensures that vehicles and other vehicles do not slip when passing over the drainage channel unit 1 along the drainage flow direction.

[0049] Furthermore, even if a truck passes over the guard plate 3 and a relatively large load is applied to the guard plate 3 from above, the load is transmitted to the bottom wall portion 2a via the round support portion 3d and the rib 3e, and can be received by the bottom wall portion 2a. This prevents the guard plate 3 from deforming.

[0050] Furthermore, when rainwater introduced into the first water channel section 2d via the drainage hole 3c flows through the ribs 3e provided between the first water channel section 2d and the second water channel section 2e, debris such as fallen leaves contained in the rainwater will get caught on each rib and be collected. This prevents debris from entering the second water channel section 2e, thus preventing the drainage performance of the drainage ditch unit 1 from deteriorating due to the accumulation of debris in the second water channel section 2e.

[0051] Furthermore, for example, if the guard plate 3 is removed from the drainage unit 1, the rib 3e that separates the first water passage section 2d and the second water passage section 2e will no longer be present on the water flow plate 2, thus preventing the rib 3e from getting in the way when cleaning the water flow plate 2 of the drainage unit 1.

[0052] Furthermore, for example, when a vehicle passes over the guard plate 3, even if the vehicle's wheels pass over the drainage holes 3c, the load of the vehicle is transmitted to the bottom wall portion 2a by the round support portion 3d, and the load is then absorbed by the bottom wall portion 2a. This prevents deformation of the area around the drainage holes 3c in the guard plate 3 due to the load of the vehicle.

[0053] In this embodiment, an example was described in which the drainage unit 1 is installed or temporarily installed on bridge B. However, the drainage unit 1 may also be installed or temporarily installed on roads other than bridge B, such as elevated bridges, underpasses, tunnels, and streets.

[0054] Furthermore, in this embodiment, an example was described in which the drainage ditch unit 1 is installed or temporarily erected on the shoulder S of the bridge B in a position in which its longitudinal direction coincides with the extension direction of the bridge B. However, the drainage ditch unit 1 may also be installed or temporarily erected on the bridge B in a position in which its longitudinal direction extends horizontally, intersecting the extension direction of the road such as the bridge B.

[0055] Furthermore, in this embodiment, the drainage unit 1 had a roughly rectangular shape in plan view, but it may have a shape other than a roughly rectangular shape, such as a roughly square shape in plan view.

[0056] Furthermore, although this embodiment describes an example where the drainage unit 1 is temporarily installed on bridge B and set on roadway D, the drainage unit 1 may also be set on sidewalks, bicycle-walking roadways, or bicycle-only lanes. In this case, the anti-slip layer L makes it possible to ensure the drainage performance of the drainage unit 1 while reliably preventing pedestrians and cyclists from slipping.

[0057] Furthermore, although this embodiment describes an example in which the longitudinal direction of the drainage channel unit 1 coincides with the "predetermined drainage flow direction," the "predetermined drainage flow direction" is not limited to the longitudinal direction, but may be, for example, a horizontal direction intersecting the longitudinal direction, as long as it coincides with the extending direction of the second waterway section 2e.

[0058] Furthermore, in this embodiment, the first region A1 and the second region A2 were arranged alternately along the longitudinal direction, but as shown in Figure 11, they may also be arranged alternately along the intersecting direction.

[0059] Furthermore, in this embodiment, the first region A1 and the second region A2 were substantially rectangular in plan view, but they may be other shapes as long as they can connect the peripheral edge R of the top wall portion 3a of the guard plate 3 with the drainage hole 3c. For example, the second region A2 may be provided so as to extend radially from the drainage hole 3c toward the peripheral edge R of the top wall portion 3a in plan view.

[0060] Furthermore, in this embodiment, the area of ​​the first region A1 was smaller than the area of ​​the second region A2, but the areas of the first region A1 and the second region A2 may be the same, or the area of ​​the first region A1 may be larger than the area of ​​the second region A2.

[0061] Furthermore, in this embodiment, multiple drainage holes 3c were arranged side by side along the longitudinal direction, but they may also be arranged side by side along the intersecting direction, or only one drainage hole 3c may be provided.

[0062] Furthermore, in this embodiment, the round support portion 3d and the rib 3e were projected downward from the lower surface of the guard plate 3, but they may also be projected upward from the upper surface of the water flow plate 2.

[0063] Furthermore, in this embodiment, the ribs 3e were arranged in parallel along the longitudinal direction of the drainage unit 1, but they may also be arranged in parallel along a direction intersecting the longitudinal direction, or they may be arranged in parallel in a substantially arc shape when viewed from above.

[0064] Furthermore, although a round support portion 3d and a rib 3e were provided in this embodiment, either one or both may be omitted. [Industrial applicability]

[0065] The present invention is suitable for drainage ditch units that can be installed on roads. [Explanation of symbols]

[0066] 1 Drainage Unit 2. Flowing water plate 2a Bottom wall 2d 1st water passage section 2e 2nd water passage section 3 Guard Plate 3c Drain hole 3D round support section (load transmission section) 3e Rib (Load transmission section) A1 1st area A2 2nd area L Anti-slip layer R periphery

Claims

1. A metal drainage channel unit comprising a water flow plate having a bottom wall and a guard plate provided to cover the water flow plate from above and having drainage holes penetrating in the thickness direction, wherein water flowing on the road surface is introduced into the interior as drainage through the drainage holes, and is received by the bottom wall and directed to flow in a predetermined drainage direction, The upper surface of the guard plate is provided with a first region on which an anti-slip layer is provided, and a second region on which the anti-slip layer is not provided. The second region is configured to connect the periphery of the guard plate with the drainage hole. The drainage channel unit is characterized in that the anti-slip layer is formed by applying a synthetic resin paint or by thermal spraying a thermal spray material.

2. In the drainage channel unit according to claim 1, The drainage flow direction of the aforementioned water flow plate is set to align with the extension direction of the road. The drainage channel unit is characterized in that the second region is provided so as to extend in a direction that intersects with the drainage flow direction and in a horizontal direction.

3. In the drainage channel unit according to claim 2, Each of the first and second regions is provided with multiple units, A drainage channel unit characterized in that the first region and the second region are arranged alternately along the drainage flow direction.

4. In the drainage channel unit according to claim 1, A drainage channel unit characterized in that at least one of the upper surface of the bottom wall and the lower surface of the guard plate is provided with a load transmission section that transmits a load acting on the guard plate from above to the bottom wall.

5. In the drainage channel unit according to claim 4, The load transmission section is provided along the upper surface of the bottom wall at predetermined intervals and includes a plurality of ribs that divide the bottom wall into a first water passage section and a second water passage section. The drainage channel unit is characterized in that the drainage hole is provided at a position corresponding to the first water passage section.

6. In the drainage channel unit according to claim 5, The drainage channel unit is characterized in that the ribs are provided protruding downward from the lower surface of the guard plate.

7. In the drainage channel unit according to claim 4, The load transmission section includes a cylindrical support section that extends vertically, The drainage channel unit is characterized in that the round support portion is positioned in close proximity to the drainage hole.

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