Artificial turf drainage structure

Abstract

To reduce maintenance work such as cleaning, and to easily and reliably collect small pieces flowing from an athletic field without causing rainwater to flow into the athletic field.SOLUTION: An artificial lawn drainage structure comprises: a gutter 2 having a water permeable function on the bottom; a mesh body 3 arranged so as to partition the inside of the gutter 2 from the bottom to a prescribed height, and having a cylindrical mesh body 31 extending along the gutter 2 with an opening formed on the upstream side and an end plate 34 closing the opening on the downstream side, and formed of a mesh over the entire peripheral surface; and a steel wool 4 disposed inside the mesh body 31 at least on the downstream side and having a collection function and water permeability by adhering long, thin small pieces F generated from an artificial lawn. The mesh body 3 has a folded section 32 extending from at least the upper end of the opening edge of the mesh body 31 toward the downstream side in the mesh body 31.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a drainage structure for artificial turf. [Background technology]

[0002] Conventionally, in order to drain rainwater that falls on typical outdoor artificial turf sports fields such as baseball fields, soccer fields, and rugby fields, gutters are installed around the four perimeters of the sports field and rainwater is collected in these gutters. The collected rainwater then reaches the gutters, where it is further collected in one or more manholes and discharged outside the field through an underdrain pipe. Depending on the rainfall conditions, the discharged rainwater is discharged into a river or the like via a storm water pipe.

[0003] Meanwhile, in artificial turf athletic fields, various sports activities are performed on the artificial turf. Such activities include not only simple walking, but also sliding, which may involve the application of large amounts of energy. Artificial turf is manufactured by planting synthetic resin grass blades so that it can withstand large amounts of energy. However, when large amounts of energy exceeding the design standards are applied, or due to aging such as exposure to ultraviolet rays, the strength of the resin body decreases, and the artificial turf is cut into small pieces. In addition, in recent years, artificial turf often has fine resin chips packed into the base of the turf to absorb energy and reduce the strain on the knees and other parts of the body of people using the playground.

[0004] Small pieces of artificial turf, such as broken pieces and chips, flow into the drains along with rainwater, but these drains only have gratings installed to prevent large foreign objects from falling in, and are not designed to capture the small pieces. Therefore, the resulting resin-derived fragments flow into rivers and oceans along with other wastewater. These fragments are called microplastics, and in recent years have been attracting attention as a substance that has an environmental impact on organisms living in rivers and oceans. As a device for addressing such problems, for example, as shown in Patent Document 1, a perforated corrugated pipe is installed inside a drainage gutter, and small pieces of grass are collected through this corrugated pipe. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2011-137354 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional drainage structure installed in athletic fields with artificial turf, such as that shown in Patent Document 1, the filtering mesh of the corrugated pipe alone quickly becomes clogged, and when it becomes clogged, there is a problem that rainwater overflows onto the athletic field. In addition, cleaning the gap at the bottom of the corrugated pipe is difficult, and there is room for improvement in this regard.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a drainage structure for artificial turf that can reduce the work required for maintenance such as cleaning, and can easily and reliably collect small pieces that flow in from the playground without causing rainwater to flow into the playground. [Means for solving the problem]

[0008] In order to achieve the above object, the drainage structure for artificial turf according to the present invention is an artificial turf drainage structure provided around the artificial turf, comprising a gutter having a water permeability function at its bottom, a cylindrical mesh body arranged to separate the inside of the gutter from the bottom surface to a predetermined height, with an opening formed on the upstream side and an end plate that closes the opening on the downstream side, extending along the gutter, and formed of mesh around its entire periphery, and a mesh body arranged at least on the downstream side inside the mesh body, with a thin and long shaped mesh that arises from the artificial turf small pieceThe device is characterized by having a recovery function by adhering a small piece to the surface and a small piece recovery member having water permeability.

[0009] In this invention, when small pieces such as resin small pieces and chips generated from the artificial turf flow into the gutter together with rainwater, the rainwater containing the small pieces flows into the mesh body from the opening on the upstream side of the mesh body along the folded part, and the rainwater passes through the small piece collection member and the mesh body formed by the mesh and is further drained to the downstream side of the gutter. At this time, the small pieces that flow into the mesh body adhere to the small piece collection member located on the inside downstream side of the mesh body, so they can be easily collected. This allows the small particle collection member to have a filtering effect for collecting small particles, and since small particles attached to the small particle collection member do not reach the mesh body, clogging of the mesh of the mesh body can be prevented. Therefore, only rainwater can be reliably drained from the gutter, and it is possible to prevent rainwater and small particles from overflowing from the gutter onto the artificial turf due to clogging of the mesh. Furthermore, it is possible to prevent small particles that have flowed into the gutter from being discharged from the bottom into the main drainage gutter together with the rainwater, and it is possible to prevent small particles from flowing out of the artificial turf site.

[0010] Furthermore, in the present invention, the area separated by the mesh body within the gutter extends from the bottom surface of the gutter to a predetermined height, i.e. the entire cross section of the gutter is not separated by the mesh body. Therefore, compared to the case where all rainwater from the early to later stages of rainfall is filtered using a small particle collection member, rainwater in the early stages of rainfall which contains a large amount of small particles can be collected and processed more efficiently and reliably. Furthermore, in the present invention, the mesh body equipped with the debris collection member can be installed simply by placing it in the gutter, so that the mesh body equipped with the debris collection member can be retrofitted to an existing gutter.

[0011] In addition, in the present invention, when collecting small pieces that have flowed into the gutter, the mesh body is removed from the gutter together with the small piece collecting member, and the small pieces are removed by replacing or cleaning the small piece collecting member to which the small pieces have adhered. This reduces clogging of the filter mesh of the permeable drainage pipe as in the conventional method, and reduces the work required for maintenance such as cleaning.

[0012] In addition, in the drainage structure for artificial turf according to the present invention, it is preferable that the mesh body is provided with a folded portion extending from at least the upper end of the opening edge of the mesh body towards the downstream side within the mesh body.

[0013] In this case, since the mesh body is provided with a folded portion, even if the amount of rainfall increases and the water level in the gutter rises, the steel wool particle recovery member in which the particles remain can be prevented from flowing out from the upstream opening of the mesh body, which makes it possible to suppress clogging of the mesh of the mesh body due to the flow-out of the particle recovery member.

[0014] Furthermore, the drainage structure for artificial turf according to the present invention may be characterized in that the cross section of the mesh body narrows toward the downstream side.

[0015] In this case, the cross-section within the mesh body is reduced in size on the downstream side, so that small pieces can be efficiently collected by the small piece collection member placed in the reduced small cross section, thereby improving the processing capacity through collection.

[0016] Furthermore, the drainage structure for artificial turf according to the present invention may be characterized in that the small piece collection member is arranged along an inner circumferential surface on the downstream side of the mesh main body.

[0017] In this case, the small piece collection member placed within the mesh body can be prevented from floating and moving within the mesh body, thereby preventing it from flowing out of the mesh body along with the wastewater through the upstream opening of the mesh body.

[0018] Furthermore, the drainage structure for artificial turf according to the present invention may be characterized in that the mesh body is made of stainless steel.

[0019] In this case, since the stainless steel mesh body is less susceptible to rust, clogging of the mesh can be suppressed.

[0020] Furthermore, the drainage structure of the artificial turf of the present invention may be characterized in that the gutter is provided in two parts, a first gutter closer to the artificial turf and a second gutter on the opposite side of the artificial turf, sandwiched between the first gutter.

[0021] In this case, when there is extremely heavy continuous rainfall, such as during a typhoon, the provision of double gutters makes it possible to prevent insufficient drainage from the artificial turf, which can lead to flooding or inundation of the surrounding area. Effect of the Invention

[0022] The drainage structure of the artificial turf of the present invention reduces the work required for maintenance such as cleaning, and can easily and reliably collect small debris that flows in from the playground without causing rainwater to run off into the playground. [Brief description of the drawings]

[0023] [Figure 1] 1 is a plan view of an artificial turf drainage structure according to an embodiment of the present invention, viewed from above. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1, showing a side cross-sectional view of the drainage structure. [Diagram 3] 2 is a cross-sectional view taken along line BB shown in FIG. 1, showing the drainage structure as viewed from the upstream side. [Figure 4] 1A and 1B are side cross-sectional views showing the drainage state of the drainage structure, where (a) is a diagram showing the early stage of rainfall, and (b) is a diagram showing the later stage of rainfall. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a drainage structure for artificial turf according to an embodiment of the present invention will be described with reference to the drawings.

[0025] A drainage structure 1 for artificial turf according to the present embodiment is provided around the artificial turf, as shown in Figs.

[0026] The symbol S in the figure indicates artificial turf. The artificial turf ground is constructed by laying artificial turf S, which is a mixture of sand, rubber chips, and other granular materials, on top of the grass. Hereinafter, thin and long pieces of resin and chips generated from the artificial turf will be referred to as pieces F.

[0027] The drainage structure 1 comprises a gutter 2 having a water-permeable bottom wall 21 (bottom), a mesh body 3 arranged so as to separate the inside of the gutter 2 from the bottom surface 21a to a predetermined height, and having an opening formed on the upstream side of the drainage W (left side of the paper in Figures 1 and 2) and an end plate 34 that closes the opening on the downstream side (right side of the paper in Figures 1 and 2), and formed of mesh around the entire periphery, and steel wool 4 (small piece collection member) arranged inside the mesh body 3. The wastewater W flows from the left side to the right side of the paper in FIGS. 1 and 2 (indicated by the arrow in FIG. 2).

[0028] The gutter 2 is connected to a main drainage gutter (not shown) at its downstream end. The main drainage gutter may be a culvert. The gutter 2 is buried in the ground over a part or the entire circumference of the artificial turf ground. As shown in FIG. 3, the gutter 2 is formed with a U-shaped cross section, consisting of a bottom wall 21 and a pair of side walls 22, 22 rising from both ends of the bottom wall 21 in the width direction. The upper opening 2a of the gutter 2 is covered with a cover 23 made of concrete or hot-dip galvanized metal. The side wall 22 is provided so that the upper end 22a of the gutter 2 is flush with the surface of the artificial turf S of the ground. The gutter 2 is provided with a slight downward gradient along the drainage direction. The bottom wall 21 of the gutter 2 has water permeability so that rainwater is drained to the ground on the lower surface 21b side of the bottom wall 21.

[0029] 1 to 3, the mesh body 3 includes a cylindrical mesh body 31 extending along the side gutter 2, and a folded portion 32 extending from an upper end 31a of the opening edge of the mesh body 31 toward the downstream side within the mesh body 31. The mesh body 3 is formed of a stainless steel mesh material. The mesh body 3 may be fixed to the side gutter 2 by a predetermined fixing means, or may be provided in a state where it is simply placed or fitted in the side gutter 2.

[0030] The mesh body 31 includes a cylindrical body 33 whose cross section is reduced toward the downstream side, and an end plate 34 that closes the opening on the downstream side of the cylindrical body 33. The cylindrical body 33 includes an upper surface 331, a lower surface 332, and both side surfaces 333, 333. The cylindrical body 33 includes a full-width portion 33A whose width from the middle portion in the length direction to the upstream side corresponds to the distance between the side walls 22, 22 of the gutter 2, and a reduced portion 33B whose width is reduced from the middle portion to the downstream side. The lower surface 332 of the cylindrical body 33 is placed on the bottom surface 21a of the bottom wall 21 of the gutter 2. The height of the upper surface 331 of the cylindrical body 33 is set by the water level of rainwater flowing into the gutter 2 at the beginning of rainfall, for example, as shown in FIG. 4(a).

[0031] 2, the folded portion 32 is curved so as to gradually approach the lower surface 332 of the cylindrical body 33 from the upper end 31a of the opening edge toward the upstream side. The tip 32a of the folded portion 32 is located in the middle of the cylindrical body 33 in the longitudinal direction and is located a predetermined distance above the lower surface 332. The folded portion 32 is also formed of the same stainless steel mesh material as the cylindrical body 33.

[0032] In the drainage structure 1 configured in this manner, rainwater (drainage W) flowing into the gutter 2 passes through the mesh body 3, except for the water that flows through the upper part when the gutter is full, as shown in Figure 4(b), and flows toward the downstream side of the mesh body 3.

[0033] 2, a large number of steel wools 4 formed to a predetermined size are arranged along the inner circumferential surface of the mesh body 31. Specifically, the large number of steel wools 4 are laid so as to cover the inner surfaces of the upper surface 331 of the cylindrical body 33, the lower surface 332, the upstream portion of the side surface 333, and the end plate 34.

[0034] The steel wool 4 is a member formed of a stainless steel wire mesh. In this embodiment, steel wool 4 is used as an example of the small piece collection member, but the present invention is not limited thereto, and for example, a nonwoven fabric of polyvinylidene chloride fibers or a member having micropores can also be used. In short, the small piece collection member may be a member that has a collection function by adhering small pieces of artificial turf F and has water permeability. Furthermore, the small piece collection member is preferably a member that allows powder such as soil to pass through, but has a function of adhering thin and long pieces such as the small pieces of artificial turf F to the surface in a tangled manner without allowing them to pass through. Further, specific examples of the small piece recovery member that can be used include OM-150 Saralock (registered trademark, manufactured by Daito Sangyo Co., Ltd.) and Wire Mesh Demister (registered trademark, manufactured by Okutani Wire Mesh Manufacturing Co., Ltd.).

[0035] Next, the operation of the drainage structure 1 for artificial turf described above will be described in detail with reference to the drawings. 4(a) and (b), in this embodiment, when small pieces F such as resin small pieces and chips generated from the artificial turf S flow into the gutter 2 together with the drainage water W, the rainwater mixed with the small pieces flows into the mesh body 31 from the opening on the upstream side of the mesh body 31 in the mesh body 3 along the folded portion 32, and the drainage water W passes through the steel wool 4 and the mesh body 31 formed by the mesh, and is further drained to the downstream side of the gutter 2. At this time, the small pieces F that flow into the mesh body 31 adhere to the steel wool 4 arranged on the downstream side inside the mesh body 31, and can be easily collected.

[0036] This allows the steel wool 4 to have a filtering effect of collecting the small pieces F, and the small pieces F attached to the steel wool 4 do not reach the mesh body 31, preventing clogging of the mesh of the mesh body 31. This ensures that only the wastewater W is drained from the gutter 2, preventing the wastewater W and small pieces F from overflowing from the gutter onto the artificial turf S due to clogging of the mesh. Furthermore, it is possible to prevent the small pieces F that have flowed into the gutter 2 from being discharged from the bottom into the main drain together with rainwater, preventing the small pieces F from flowing out of the site of the artificial turf S.

[0037] Furthermore, in this embodiment, the area of ​​the mesh body 3 that divides the inside of the gutter 2 extends from the bottom surface of the gutter 2 to a predetermined height, i.e., the entire cross section of the inside of the gutter 2 is not divided by the mesh body 3. Therefore, compared to the case where all the wastewater W from the early stage of rainfall to the later stage of rainfall is filtered with steel wool 4 as shown in FIG. 4(b), the wastewater W in the early stage of rainfall that contains a large amount of small particles F as shown in FIG. 4(a) can be collected and treated more efficiently and reliably.

[0038] Moreover, in this embodiment, the installation can be achieved simply by placing the mesh body 3 provided with the steel wool 4 in the gutter 2. Therefore, the mesh body 3 equipped with the steel wool 4 can be retrofitted to an existing gutter.

[0039] In addition, in this embodiment, when recovering small pieces F that have flowed into the gutter 2, the mesh body 3 is removed from the gutter 2 together with the steel wool 4, and the steel wool 4 to which the small pieces F have adhered is replaced or cleaned to remove the small pieces F. This reduces clogging of the filter mesh of permeable drainage pipes as was previously the case, and reduces the amount of work required for maintenance such as cleaning.

[0040] In addition, in this embodiment, the mesh body 31 is provided with a folded portion 32, so that even if the amount of rainfall increases and the water level in the gutter 2 rises, as shown in Figure 4(b), the steel wool 4 with the small pieces F retained therein can be prevented from flowing out from the upstream opening 33a of the mesh body 31. Therefore, clogging of the mesh of the mesh body 31 due to the outflow of the steel wool 4 can be suppressed.

[0041] In addition, in this embodiment, the cross section within the mesh body 31 has a reduced shape on the downstream side, so that the small pieces F can be efficiently collected by the steel wool 4 arranged in the reduced small cross section, thereby improving the processing capacity through collection.

[0042] Furthermore, in this embodiment, the multiple steel wools 4 arranged within the mesh body 31 are prevented from floating and moving within the mesh body 31, thereby preventing them from flowing out of the mesh body 3 along with the wastewater W through the upstream opening 33a of the mesh body 31.

[0043] Furthermore, in this embodiment, the mesh body 3 made of stainless steel is less susceptible to rust, so clogging of the mesh can be suppressed.

[0044] As described above, the artificial turf drainage structure 1 of this embodiment can reduce the work required for maintenance such as cleaning, and can easily and reliably collect small pieces F flowing in from the playground without causing drainage W to flow into the playground.

[0045] The above describes an embodiment of the drainage structure for artificial turf according to the present invention, but the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention.

[0046] For example, the configurations such as the shape, extension, and dimensions of the gutter 2 and mesh body 3 of the drainage structure 1 of this embodiment can be appropriately set in consideration of the applicable drainage capacity.

[0047] For example, in this embodiment, the mesh body 3 is configured to have the folded-back portion 32, but such folded-back portion 32 may be omitted.

[0048] In addition, in this embodiment, the mesh body 31 has a shape in which the cross section is reduced toward the downstream side, but this is not limited to such a reduced shape, and for example, the mesh body may have a cross section that is the same throughout the entire length direction, with only the full-width portion 33A without providing the reduced portion 33B.

[0049] Furthermore, in this embodiment, the steel wool 4 (small piece recovery member) is arranged along the inner circumferential surface on the downstream side of the mesh body 31, but is not limited to this. For example, it may be arranged along the entire inner circumferential surface of the mesh body 31, or it may be simply accommodated within the mesh body 31 without being provided along the inner circumferential surface of the mesh body 31.

[0050] Furthermore, the mesh body 3 is not limited to being made of stainless steel, and other materials may also be used.

[0051] In addition, the drainage structure 1 can be configured so that the gutter 2 has two drainage channels, a first gutter closer to the artificial turf and a second gutter on the opposite side of the artificial turf, sandwiched between the first gutter. In this case, when there is extremely heavy continuous rainfall, such as during a typhoon, double gutters (first gutter and second gutter) are installed, which makes it possible to prevent insufficient drainage from the artificial turf S, resulting in flooding and inundation of the surrounding area.

[0052] In addition, in this embodiment, the target of application of the gutter 2, which is a component of the drainage structure 1, is a general U-shaped gutter, but it is not limited to such a U-shaped gutter and may be, for example, a rainwater manhole.

[0053] In addition, the components in the above-described embodiments can be replaced with well-known components as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0054] 1 Drainage structure 2. Gutters 3 Mesh body 4. Steel wool (small piece collection material) 21 Bottom wall 21a Bottom 31 Mesh body 31a Upper edge of opening 32 Turning section 33 Cylinder 34 End plate F small piece S Artificial grass W Drain

Claims

1. An artificial turf drainage structure provided around the artificial turf, A gutter having a water permeable function at the bottom; a cylindrical mesh body disposed within the gutter from the bottom to a predetermined height, with an opening formed on the upstream side and an end plate closing the opening on the downstream side, extending along the gutter, and formed of mesh around the entire periphery; An artificial turf drainage structure characterized by having a small piece collection member that is located at least on the downstream side inside the mesh body, and has a collection function by adhering small thin, long pieces generated from the artificial turf, and has water permeability.

2. 2. The drainage structure for artificial turf according to claim 1, characterized in that the mesh body has a folded portion extending from at least an upper end of an opening edge of the mesh body toward a downstream side within the mesh body.

3. 3. The drainage structure for artificial turf according to claim 1, wherein the cross section of the mesh body is tapered toward the downstream side.

4. 4. The drainage structure for artificial turf according to claim 1, wherein the small piece collection member is disposed along the inner circumferential surface on the downstream side of the mesh body.

5. 5. The drainage structure for artificial turf according to claim 1, wherein the mesh body is made of stainless steel.

6. The drainage structure for artificial turf described in any one of claims 1 to 5, characterized in that the gutter is provided in a double structure, with a first gutter closer to the artificial turf and a second gutter on the opposite side of the artificial turf, sandwiched between the first gutter.

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