Drainage slab

Abstract

To provide a drainage slab that can handle laying of simple drainage equipment in a parking space or the like, and further can handle renewing of a drainage gutter by fitting a cover body capable of attaching and detaching a curb stone to an existing or new U-groove.SOLUTION: A drainage slab 100 comprises a plate-like slab body 10 with a rectangle formed in a plan view, at least one open hole 16 bored along a lengthwise direction of the slab body 10, a protruded part 14 formed in a protruding state at a top surface of the slab body 10 along the open hole 16, embedded nuts 18 embedded at the top surface of the slab body 10, and an L-shaped body 20 attachable and detachable to the embedded nuts 18. The L-shaped body 20 mounted to the embedded nuts 18 covers a part of the open hole 16.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a drainage slab, and more particularly to a drainage slab for draining rainwater, etc. on a road surface into a drainage ditch or underground. [Background technology]

[0002] In a curb-equipped drainage ditch arranged at both ends of a road in the width direction, there is a configuration in which the curb placed on the upper surface of the drainage ditch can be attached and detached in order to facilitate maintenance of the flow path space. As an example of such a configuration, the applicant has proposed a configuration disclosed in Patent Document 1 (Patent Publication No. 7200429). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7200429 (Claim 1, paragraphs 0021-0025, Figures 1-6, etc.) Summary of the Invention [Problem to be solved by the invention]

[0004] The structure disclosed in Patent Document 1 is convenient for constructing or updating drainage ditches, but has the problem that it requires a large amount of excavated soil for construction, making it unsuitable for constructing simple drainage facilities in parking lots, etc. It also has the problem that it cannot be used for renewing drainage ditches by attaching a lid body with a removable curbstone to an existing U-shaped drain. [Means for solving the problem]

[0005] Therefore, the present invention aims to propose a drainage slab that can be used to install simple drainage facilities in parking lots, etc., and can also be used to renew drainage gutters by attaching a detachable cover to an existing or newly constructed U-shaped gutter.

[0006] In other words, the present invention is a drainage slab comprising a flat slab body formed into a rectangle when viewed from above, at least one through hole drilled along the longitudinal direction of the slab body, a protrusion protruding from the upper surface of the slab body along the through hole, an embedded nut embedded in the upper surface of the slab body, and an L-shaped body that can be attached and detached to the embedded nut, wherein the L-shaped body attached to the embedded nut covers a portion of the through hole.

[0007] There is also an invention as a drainage slab comprising a flat slab body formed into a rectangle when viewed from above, at least one through hole drilled along the longitudinal direction of the slab body, a protrusion protruding from the upper surface of the slab body along the through hole, an embedded nut embedded in the upper surface of the slab body, an L-shaped body that can be attached and detached to the embedded nut, and a curb arranged on the upper surface of the slab body, wherein a portion of the through hole is covered by the curb sandwiched between the protrusion and the L-shaped body.

[0008] As a result, it is possible to install simple drainage facilities in parking lots and the like, and also to renovate drainage gutters by attaching a lid with a removable curb to an existing U-shaped gutter.

[0009] Also, it is preferable that the protrusion is formed integrally with the slab body.

[0010] This allows the drainage slab to be manufactured inexpensively.

[0011] It is also preferable that the through hole is formed to reach the planar position of the protruding portion.

[0012] This increases the freedom to place through-holes (drainage outlets) that take drainage water from the road surface into underground infiltration sections or drainage ditches.

[0013] Further, the protruding portion is erected at the middle portion in the width direction of the slab body, and the slab body is divided into a first area on the side where the embedded nut is embedded and a second area different from the first area, and it is preferable that the through holes are disposed in both the first area and the second area.

[0014] Thereby, drainage from both the sidewalk and the roadway can be taken into the underground infiltration section or the drainage ditch.

[0015] Further, it is preferable that the protruding portion is a second L-shaped body attached to the upper surface of the slab body.

[0016] Thereby, the slab body of the drainage slab can be flattened, and variations of the protruding portion only require preparing a plurality of second L-shaped bodies, enabling a significant reduction in manufacturing costs.

Effect of the Invention

[0017] According to the configuration of the present invention, by communicating the through hole with the underground infiltration section or the drainage ditch in a state where the opening surface of the through hole is adjusted by the L-shaped body, it is possible to lay a simple drainage facility in a parking lot or the like, or to lay a cover on an existing U-shaped groove as a renewal of the U-shaped groove, thereby increasing the passable area.

Brief Description of the Drawings

[0018] [Figure 1] It is a perspective view of the drainage slab in the first embodiment. [Diagram 2] It is a cross-sectional view of a main part showing an example of laying the drainage slab in the first embodiment. [Diagram 3] It is a perspective view of the drainage slab in the second embodiment. [Figure 4] It is an example of laying the drainage slab shown in FIG. 3 and is a cross-sectional view taken along line IV-IV in FIG. 3. [Diagram 5] It is a perspective view of the drainage slab in the third embodiment. [Figure 6]6 is a cross-sectional view taken along line VI-VI in FIG. 5, showing an example of the drainage slab installation. [Figure 7] A plan view of a drainage slab in the fourth embodiment. [Figure 8] 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 7. [Figure 10] A plan view of the drainage slab in the fifth embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing an example of the installation of the drainage slab shown in FIG. [Figure 12] FIG. 11 is a cross-sectional view showing an example of the installation of the drainage slab shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a specific embodiment of the drainage slab 100 according to the present invention will be described with reference to the drawings. In this embodiment, the direction in which the drainage slab 100 is arranged (the direction of arrow A in FIG. 1) is defined as the length direction, and the direction perpendicular to the length direction in the horizontal plane (the direction of arrow B in FIG. 1) is defined as the width direction.

[0020] (First embodiment) As shown in Fig. 1 and Fig. 2, the drainage slab 100 in this embodiment includes a flat slab body 10 that is L-shaped in front view and rectangular in plan view, and an L-shaped body 20 disposed on the upper surface of the slab body 10. The slab body 10 has a flat plate portion 12, a protruding portion 14 protruding upward from the upper surface at one end in the width direction of the flat plate portion 12, two through holes 16 adjacent to the protruding portion 14 and drilled along the length direction of the flat plate portion 12 (slab body 10), and an embedded nut 18 embedded in the upper surface of the flat plate portion 12 (slab body 10) along the through hole 16. Here, the protruding portion 14 is formed integrally with the flat plate portion 12 (slab body 10), but it is also possible to adopt a form in which the protruding portion 14 formed separately from the flat plate portion 12 is detachable from the flat plate portion 12. Although two through holes 16 are drilled in the slab body 10, it is sufficient that at least one through hole 16 is drilled.

[0021] The L-shaped body 20 has a first side 22 placed on the upper surface of the flat plate portion 12 (slab main body 10) and a second side 24 standing along the protruding portion 14. A fixing hole 26 is drilled in the first side 22 in alignment with the position of the embedded nut 18 on the upper surface of the flat plate portion 12. If the fixing hole 26 is formed as a long hole that is long in the width direction as shown in FIG. 1, the position of the L-shaped body 20 relative to the slab main body 10 can be adjusted. The height position of the upper end of the second side 24 is set to be the same height as the height position of the upper end of the protruding portion 14 when the L-shaped body 20 is integrated with the slab main body 10.

[0022] FIG. 2 is a cross-sectional view of the main part in the width direction at the position of the through hole 16 in the state where the slab main body 10 and the L-shaped body 20 shown in FIG. 1 are assembled, and shows an example of the laid state of the drainage slab 100 when surface water is allowed to infiltrate underground in a parking lot or the like. In the present embodiment, the drainage slab 100 is prepared by appropriately excavating the original ground 200, laying a single-grained crushed stone layer 210 in a required dimension, and laying a spacer 220 having a water-permeable or water-passing part (not shown) on the upper surface of the single-grained crushed stone layer 210. The slab main body 10 is then laid on the spacer 220, and aligned so that the L-shaped body 20 covers a part of the width direction of the upper surface opening of the through hole 16, and the bolt 30 is fastened to the embedded nut 18 to construct the drainage slab 100. After the drainage slab 100 is laid on the original ground 200 in this way, a pavement 230 is laid up to the height position of the upper end surface of the protruding part 14 and the second side 24. The pavement 230 is sloped so that surface water flows toward the opening of the through-hole 16 (in the direction of the arrow in FIG. 2).

[0023] In a parking lot or the like in which the drainage slab 100 is laid in this way, surface water from the pavement 230 is collected in the drainage slab 100 and can be taken in through the opening of the through hole 16 formed by the protrusion 14 and the L-shaped body 20. The surface water taken in through the opening passes through the water-permeable part of the spacer 220 and the single-grained crushed stone layer 210 and permeates into the original ground 200. This embodiment is advantageous in that the surface water from the pavement 230 in a parking lot or the like can be permeated into the original ground 200 (underground) with a simple configuration. It is also possible to omit laying the single-grained crushed stone layer 210 and lay the drainage slab 100 using the spacer 220 having water permeability and a spacer for adjusting the height position (not shown).

[0024] Second embodiment The drainage slab 100 in this embodiment is characterized in that a portion of the through hole 16 is covered by the curbstone 40, as shown in Fig. 3. In this embodiment, the components common to the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and detailed description thereof will be omitted. The through hole 16 in this embodiment is drilled at a planar position that reaches a portion of the planar position of the flat plate portion 12 and the protruding portion 14. The length dimension of the through hole 16 in this embodiment is formed shorter than the length dimension of the curbstone 40.

[0025] In addition, the curbstone 40 has a first abutment surface 42 that abuts against the protrusion 14 formed on an upright surface at the same height as the protrusion height of the protrusion 14, and a second abutment surface 44 that abuts against the L-shaped body 20 formed on an upright surface at the same height as the rising height of the second side 24 of the L-shaped body 20. The rising height of the second side 24 of the L-shaped body 20 in this embodiment is higher than the rising height of the protrusion 14. On both sides in the width direction of the curbstone 40, two gripping recesses 46 are arranged at two positions spaced apart by a required distance in the length direction. The curbstone 40 thus formed is attached in a state of being clamped by the protrusion 14 and the L-shaped body 20 on the upper surface of the flat plate portion 12 (slab main body 10). As described above, the through hole 16 in this embodiment is formed over a part of the flat plate portion 12 and the protrusion 14, so that the through hole 16 after the curbstone 40 is attached opens only on the upper surface of the protrusion 14.

[0026] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. The drainage slab 100 in this embodiment is laid so as to cover the upper surface of the existing U-shaped gutter 50. The U-shaped gutter 50 is laid on the leveling concrete 250 after excavating the original ground 200 by a known method and laying a foundation crushed stone layer 240 and leveling concrete 250. In order to effectively utilize the opening part of the upper surface of such an existing U-shaped gutter 50, the drainage slab 100 is laid as a drop cover. Then, the pavement 230 is laid so that the upper surface height position of the protruding part 14 and the upper end surface height position of the second side 24 of the L-shaped body 20 are the upper surface height position of the pavement 230. The pavement 230 is sloped in the direction of the arrow in FIG. 4. This allows road drainage to flow down the flow path 52 of the U-shaped gutter 50 from the opening of the through hole 16 formed between the protruding part 14 and the curbstone 40, and the laid part of the U-shaped gutter 50 can be effectively used as part of the sidewalk or roadway.

[0027] Third embodiment As shown in Fig. 5, the drainage slab 100 in this embodiment is characterized in that the upper surface of the flat plate portion 12 (slab body 10) is divided into a first area 10A and a second area 10B by a protruding portion 14, and in addition to a through hole 16 as a first through hole arranged in the first area 10A, a second through hole 17 is drilled in the second area 10B. In this embodiment, the components common to the above embodiments are denoted by the same reference numerals as those used in the above embodiments, and detailed explanations thereof will be omitted here.

[0028] The protruding portion 14 in this embodiment is erected in the widthwise middle of the flat plate portion 12 (slab body 10), and the upper surface of the slab body 10 is divided into a first area 10A on the side where the embedded nuts 18 are embedded, and a second area 10B different from the first area 10A. In addition, a second through hole 17 is arranged in the second area 10B. In this embodiment, the second through hole 17 is formed to be shorter than the arrangement length of the through hole 16, but is arranged at a plurality of locations in the longitudinal direction of the slab body 10. The number of the second through holes 17 is not limited to two, and they can also be formed to be the same length as the through hole 16 arranged in the first area 10A.

[0029] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. The drainage slab 100 in this embodiment is used as a top cover for the U-shaped gutter 50. The U-shaped gutter 50 in this embodiment is a new construction. The U-shaped gutter 50 is constructed by laying a foundation crushed stone layer 240 on the original ground 200 that has been dug appropriately along the laying extension, and constructing a leveling concrete 250 on the top surface of the foundation crushed stone layer 240. The U-shaped gutter 50 is laid on the top surface of the leveling concrete 250 with a predetermined flow gradient. After the U-shaped gutter 50 is laid, the original ground 200 is backfilled, and the drainage slab 100 is installed as a top cover. The U-shaped gutter 50 and the drainage slab 100 as a top cover can be fixed to each other on their respective sides by a known method such as a connecting plate and a fixing bolt. After the drainage slab 100 is fixed to the U-shaped gutter 50, a pavement 230 is laid up to the height position of the upper surface of the protruding portion 14 of the drainage slab 100 and the height position of the upper end surface of the second side 24 of the L-shaped body 20. The pavement 230 is sloped in the direction of the arrow in FIG.

[0030] As shown in Figure 6, the upper opening of the second through hole 17 is covered by the pavement 230. By using a water-permeable pavement material for the pavement 230, surface water on the pavement 230 can flow down through the through hole 16 into the flow path 52, and water that has permeated the pavement 230 can flow down through the second through hole 17 into the flow path 52, thereby improving the drainage of the road.

[0031] (Fourth embodiment) Fig. 7 is a plan view showing an example of the installed state of the drainage slab 100 in the fourth embodiment. Fig. 8 is a cross-sectional view taken along line VIII-VIII in Fig. 7, and Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 7. In this embodiment, the same reference numerals as those used in the above embodiments are used for the configurations common to the above embodiments, and detailed description thereof will be omitted here.

[0032] The drainage slab 100 in this embodiment is characterized in that the protruding portion 14 is formed by a second L-shaped body 19 separate from the flat plate portion 12 (slab body 10). The second L-shaped body 19 is formed in an L-shape with the second side 19B bent at a right angle to the first side 19A, like the L-shaped body 20, and a bolt hole 19C is drilled in the first side 19A. The second L-shaped body 19 is fixed to the flat plate portion 12 by aligning the position of the bolt hole 19C with the position of the embedded nut 18 and fastening it with a bolt 30. In this embodiment, the rising height of the second side 19B of the second L-shaped body 19 is formed lower than the rising height of the second side 24 of the L-shaped body 20, but is not limited to this form. The standing height of the second side 19B of the second L-shaped body 19 may be formed to be the same height as the standing height of the second side 24 of the L-shaped body 20, or a form in which it is formed to be higher than the standing height of the second side 24 of the L-shaped body 20 can be adopted.

[0033] The curbstone 40 in this embodiment is attached to the upper surface of the flat plate portion 12 (slab body 10) by being sandwiched between the L-shaped body 20 and the second L-shaped body 19. A side through hole 48 is formed in the curbstone 40, penetrating in the width direction and opening on the bottom surface of the curbstone 40. Since the upper surface height position of the pavement 230 on the side of the abutment surface with the L-shaped body 20 of the side through hole 48 is higher than the upper surface height position of the pavement 230 on the side of the abutment surface with the second L-shaped body 19 of the side through hole 48, the opening height of the side through hole 48 on the abutment surface side with the L-shaped body 20 is also higher than the opening height of the abutment surface side with the second L-shaped body 19. The opening height of the side through hole 48 can be appropriately changed according to the height position on the upper end surface of the pavement 230. By using the drainage slab 100 in this embodiment as an upper cover, the curbstone 40 can be arranged directly above the U-shaped gutter 50, and the road width can be widened. Furthermore, even if the curbstone 40 is located directly above the U-shaped gutter 50, it is advantageous in that surface water from the pavement 230 can be allowed to flow down from both widthwise sides of the curbstone 40 (in the direction of the arrows in Figure 8) into the flow path 52 through the side through-holes 48.

[0034] In addition, since the through hole 16 in this embodiment is disposed at one location in the longitudinal direction of the drainage slab 100 and disposed in a range slightly shorter than the length of the drainage slab 100, if the curbstone 40 is removed, the opening of the through hole 16 can be made large on the upper surface of the drainage slab 100. This is also advantageous in that maintenance of the flow path 52 of the U-shaped gutter 50 can be easily performed.

[0035] Fifth embodiment FIG. 10 is a plan view showing an example of the installation state of the drainage slab 100 in the fifth embodiment. In the range A in FIG. 10, a form in which the curbstone 40 and the L-shaped body 20 are arranged is shown. In the range B in FIG. 10, a form in which only the L-shaped body 20 is arranged is shown. FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10, and FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. In this embodiment, the same reference numerals as those used in the above embodiments are used for the configurations common to the above embodiments, and detailed description thereof will be omitted here.

[0036] The drainage slab 100 in this embodiment is characterized in that a second embedded nut 18' is embedded in the upper surface of the flat plate portion 12 (slab body 10) in addition to the embedded nut 18. The second embedded nut 18' is embedded on the protruding portion 14 side from the position of the embedded nut 18 as the first embedded nut. As shown in FIG. 11, when a curbstone 40 is placed on the upper surface of the flat plate portion 12 (slab body 10), the position of the fixing hole 26 of the L-shaped body 20 can be aligned with the position of the embedded nut 18 and fastened with the bolt 30 to be the same as the drainage slab 100 in the second embodiment. On the other hand, as shown in FIG. 12, when a curbstone 40 is not placed on the upper surface of the flat plate portion 12 (slab body 10), the position of the fixing hole 26 of the L-shaped body 20 can be aligned with the second embedded nut 18' and fastened with the bolt 30 to be the same as the drainage slab 100 in the first embodiment.

[0037] In this way, by adopting a form in which the embedded nut 18 and the second embedded nut 18' are embedded in the upper surface of the flat plate portion 12 (slab main body 10), it is advantageous in that multiple types of drainage slab 100 embodiments can be realized with a single type of drainage slab 100 configuration.

[0038] Although the drainage slab 100 according to the present invention has been described in detail above based on a number of embodiments, the technical scope of the present invention is not limited to the above embodiments. For example, after excavating the original ground 200, either the single-grained crushed stone layer 210 or the foundation crushed stone layer 240 is constructed, The example shows a configuration in which either a spacer 220 or leveling concrete 250 is constructed on the upper surface of the single-grain crushed stone layer 210 or the foundation crushed stone layer 240, and the drainage slab 100 is laid directly or via a U-shaped gutter 50 on top of the spacer 220 or leveling concrete 250, but depending on the condition of the original ground 200, a configuration in which a known configuration other than the above-mentioned configuration is arranged between the original ground 200 and the drainage slab 100 can be adopted.

[0039] Also, a form in which grease is applied to the contact surfaces between the curbstone 40 and the protruding portion 14 (second L-shaped body 19) and the L-shaped body 20 can be adopted. The grease is preferably oil-based grease. By applying grease to the clamped surface of the curbstone 40 in this way, the gap (not shown) between the curbstone 40 and the protruding portion 14 (second L-shaped body 19) and the L-shaped body 20 after the curbstone 40 is laid is eliminated, and it is possible to prevent the infiltration of rainwater and the accumulation of fine sand and plant seeds. This makes it easy to remove the curbstone 40 and prevents the overgrowth of weeds, which lengthens the interval for performing time-based maintenance of the drainage slab 100 and contributes to reducing the cost of time-based maintenance. And, by preventing the accumulation of fine sand and the overgrowth of weeds in the drainage slab 100, it is also advantageous in that the drainage performance of the drainage slab 100 in the initial installation state can be maintained for a long period of time.

[0040] In addition, it is possible to adopt the form of the drainage slab 100 that is an arbitrary combination of the modified forms described in each embodiment or the above modified forms. [Explanation of symbols]

[0041] 10: Slab body 10A: first area, 10B: second area, 12: flat plate portion, 14: protruding portion, 16: through hole, 17: second through hole, 18: embedded nut, 18´: second embedded nut, 19: Second L-shaped body, 19A: First side, 19B: Second side, 19C: Bolt hole 20:L font 22: First side, 24: Second side, 26: Fixing hole 30: Bolt 40: Curb 42: First contact surface, 44: Second contact surface, 46: Gripping recess, 48: Side through hole 50:U-shaped groove 52: Flow path 100:Drainage slab 200: Original Ground 210: Single grain crushed stone layer 220: Spacer 230: Pavement 240: Foundation crushed stone layer 250: Smoothing concrete

Claims

1. A flat slab body formed into a rectangular shape in a plan view; At least one through hole drilled along the length of the slab body; A protrusion protruding from the upper surface of the slab body along the through hole; An embedded nut embedded in the upper surface of the slab body; An L-shaped body that is detachable from the embedded nut, A drainage slab characterized in that the L-shaped body attached to the buried nut covers a portion of the through hole.

2. 2. The drainage slab according to claim 1, wherein the protrusion is integrally formed with the slab body.

3. 2. The drainage slab of claim 1, wherein the protrusion is a second L-shaped body attached to the upper surface of the slab body.

4. A flat slab body formed into a rectangular shape in a plan view; At least one through hole drilled along the length of the slab body; A protrusion protruding from the upper surface of the slab body along the through hole; An embedded nut embedded in the upper surface of the slab body; An L-shaped body that is detachable from the embedded nut; A curb is provided on the upper surface of the slab body. A drainage slab characterized in that a portion of the through hole is covered by the curbstone sandwiched between the protrusion and the L-shaped body.

5. 5. The drainage slab according to claim 4, wherein the protrusion is integrally formed with the slab body.

6. 6. A drainage slab according to claim 4 or 5, characterized in that the through hole is formed to reach the planar position of the protrusion.

7. The protrusion is erected at the widthwise middle portion of the slab body, and divides the slab body into a first area on the side where the embedded nut is embedded and a second area different from the first area, The drainage slab according to claim 4 or 5, characterized in that the through holes are arranged in both the first area and the second area.

8. The protrusion is erected at the widthwise middle portion of the slab body, and divides the slab body into a first area on the side where the embedded nut is embedded and a second area different from the first area, The drainage slab according to claim 6 , wherein the through holes are disposed in both the first area and the second area.

9. A drainage slab as claimed in claim 4 or 5, characterized in that the protrusion is a second L-shaped body attached to the upper surface of the slab body.

10. The drainage slab of claim 6, wherein the protrusion is a second L-shaped body attached to the upper surface of the slab body.

11. The drainage slab of claim 7, wherein the protrusion is a second L-shaped body attached to the upper surface of the slab body.

12. The drainage slab of claim 8, wherein the protrusion is a second L-shaped body attached to the upper surface of the slab body.

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