Artificial Ganoderma facility

Abstract

To facilitate the recovery of broken pieces of artificial turf and rubber chips contained in a filler.SOLUTION: An artificial turf facility 10 has a first artificial turf 11 laid in a first area A1 set in a central part and a second artificial turf 12 laid in a second area A2 adjacent to the outer periphery of the first area A1, and the coefficient of water permeability of the second artificial turf 12 is twice or more the coefficient of water permeability of the first artificial turf 11.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an artificial turf facility.

Background Art

[0002] Japanese Patent Application Laid-Open No. 63-227876 discloses an artificial turf. After applying a backing material to the back surface side of a base fabric of the artificial turf formed by implanting a large number of synthetic resin leaf pieces on a water-permeable base fabric made of plain woven fabric or the like to form a lining layer, a pressurized fluid is ejected from the leaf piece side through the base fabric to blow off the backing material, thereby forming water-permeable holes in the lining layer.

[0003] Japanese Patent Application Laid-Open No. 2001-323407 discloses a sand outflow prevention structure in a sand-containing artificial turf coat or ground in which sand is mixed into the artificial turf. In the sand-containing artificial turf coat or ground disclosed in this publication, an artificial turf for preventing sand outflow formed by an artificial turf with a grass height higher than the height of the artificial turf is laid adjacent to the sand-containing artificial turf coat or ground. The artificial turf for preventing sand outflow is laid up to the upper surface of the cover of the drainage ditch, and no sand is mixed into the artificial turf for preventing sand outflow or a little sand is mixed near the adjacent sand-containing artificial turf coat. According to such a structure, it is said that the sand in the sand-containing artificial turf coat or the like is prevented from flowing out due to rainfall.

[0004] Japanese Patent Application Laid-Open No. 2009-102913 discloses a drainage structure of a ground in which the surface of a crushed stone layer serving as a roadbed is covered with a water-permeable asphalt layer, and a water-permeable artificial turf is laid on this asphalt layer. In the structure disclosed in this publication, a drainage culvert is buried with its upper surface facing the surface of the crushed stone layer. The culvert has a water-permeable structure portion that allows water to permeate from at least the upper surface facing the asphalt layer toward the internal drainage space, and an impermeable structure portion that drains the water that has permeated into the drainage space. According to such a structure, it is said that rainwater and the like are efficiently and sufficiently drained.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] By the way, in an artificial turf facility, resin is used for the piles, and wear debris (pieces of artificial turf) is generated during use. Also, rubber chips are used for the filling between the piles. When the wear debris and rubber chips flow out, they can become so-called microplastics. In such an artificial turf facility, it is desirable that the recovery of microplastics is easy.

Means for Solving the Problems

[0007] The artificial turf facility disclosed herein has a first artificial turf laid in a first area set in the central part and a second artificial turf laid in a second area adjacent to the outer periphery of the first area, and the water permeability coefficient of the second artificial turf is 2 times or more that of the first artificial turf. According to such an artificial turf facility, the recovery of microplastics becomes easy.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0009] The artificial turf facility disclosed herein will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments. Each drawing is schematically drawn and does not necessarily reflect the actual object. Also, each drawing is only an example and does not limit the present invention unless otherwise specified. Further, members and parts having the same function are appropriately given the same reference numerals, and duplicate explanations are omitted. In this specification, notations such as "X~Y" indicating a numerical range mean "X or more and Y or less" unless otherwise specified.

[0010] 〈Artificial turf facility 10〉 FIG. 1 is a cross-sectional view schematically showing the artificial turf facility 10. FIG. 2 is a schematic plan view of the artificial turf facility 10. As shown in FIG. 1, the artificial turf facility 10 includes a first artificial turf 11, a second artificial turf 12, an enclosure member 13, a drain 14, and a paving surface 20.

[0011] 〈Paving surface 20〉 Here, the paving surface 20 is a flat surface paved for laying the first artificial turf 11 and the second artificial turf 12. The paving surface 20 is composed of a roadbed, a roadbed, crushed stone, asphalt, etc. from the subgrade, and is constructed flat and precisely to align the level of the artificial turf. Note that the paving surface 20 is provided with a gradient necessary for ensuring drainage throughout. The enclosure member 13 is installed around the paving surface 20 and rises from the ground around the paving surface 20. The height of the enclosure member 13 may vary depending on the use of the artificial turf facility 10. The paving surface 20 is composed of, for example, a roadbed 21 compacted with a roller as shown in FIG. 1, a crushed stone layer 22 laid with crushed stone, and an asphalt layer 23 paved with permeable asphalt. An underdrain pipe 24 for flowing rainwater may be buried in the paving surface 20. As the underdrain pipe 24, a drain pipe having water passing holes on the side peripheral surface may be used. A corrugated perforated pipe may be used as such a drain pipe. Note that the configuration of the paving surface 20 is not limited unless otherwise specified. For example, the paving surface 20 may be composed of a roadbed 21 compacted with a roller, and the crushed stone layer 22 and the asphalt layer 23 may not be provided.

[0012] <First area A1, second area A2> In the artificial turf facility 10, a first area A1 and a second area A2 are set. The first area A1 is set in the central part of the area where the artificial turf is laid. The first area A1 may be defined along the area including the main play area of the competition held in the artificial turf facility 10. The second area A2 is set so as to be adjacent to the outer periphery of the first area A1. In other words, the second area A2 may be set in the peripheral area of the artificial turf laid on the artificial turf facility 10.

[0013] <First artificial turf 11, second artificial turf 12> The first artificial turf 11 is laid in the first area A1. The second artificial turf 12 is laid in the second area A2. The first artificial turf 11 and the second artificial turf 12 each have a base fabric 11a, 12a, a large number of piles 11b, 12b, and a filling material 11c, 12c. However, the water permeability of the first artificial turf 11 and the second artificial turf 12 is set such that the water permeability coefficient of the second artificial turf 12 is 2 times or more that of the first artificial turf 11. The first artificial turf 11 and the second artificial turf 12 each have a base fabric 11a, 12a, piles 11b, 12b, and a filling material 11c, 12c.

[0014] <Base fabrics 11a, 12a> The base fabrics 11a, 12a are sheet-like base materials. The material and form of the base fabrics 11a, 12a are not particularly limited. For example, the base fabrics 11a, 12a can be formed as plain woven fabrics made of thermoplastic resins such as polypropylene and polyethylene. Piles 11b, 12b are implanted in the base fabrics 11a, 12a. A backing layer is formed on the back surface of the base fabrics 11a, 12a. The backing layer is a layer that stops the stitches of the piles 11b, 12b and prevents the piles 11b, 12b from falling out. The backing layer can be, for example, a layer in which a backing agent is applied to the base fabrics 11a, 12a. Such a backing layer may be composed of, for example, a mixture of polyethylene and SBR latex. Note that the backing layer can be appropriately omitted.

[0015] <Piles 11b, 12b> The piles 11b and 12b have a shape imitating grass leaves and stand up from the base fabrics 11a and 12a. The material and form of the piles 11b and 12b are not particularly limited as long as the appearance of grass leaves can be realized. For the piles 11b and 12b, for example, flat filament yarns (yarns) made of thermoplastic resins such as polypropylene and polyethylene are used. Also, the piles 11b and 12b may be fixed to the base fabrics 11a and 12a by sewing plastic yarns (yarns) to be the piles 11b and 12b onto the base fabrics 11a and 12a using a tufting machine. The length from the surface of the base fabrics 11a and 12a to the tips of the piles 11b and 12b is not particularly limited either. The length (W1) from the surface of the base fabrics 11a and 12a to the tips of the piles 11b and 12b can be made relatively short, about 20 mm ≤ W1 < 50 mm (generally called short pile), or relatively long, about 50 mm ≤ W1 ≤ 70 mm (generally called long pile). The cross-sectional shape in the longitudinal direction of the piles 11b and 12b can be triangular, rectangular, circular, star-shaped, etc.

[0016] 〈Filling materials 11c and 12c〉 On the surfaces of the base fabrics 11a and 12a, between the piles 11b and 12b, filling materials 11c and 12c are filled. The filling materials 11c and 12c serve as a cushioning material to prevent players from getting injured during play and also protect the piles 11b and 12b. Also, the filling materials 11c and 12c are used to adjust the bounce of the balls used in the competition and the ease of running, and can improve the ease of play in the artificial turf 12. Such filling materials 11c and 12c can be omitted, but are particularly preferably used when the piles 11b and 12b are relatively tall piles called long piles.

[0017] For the filling materials 11c and 12c, at least one of an elastic filling material and a hard filling material can be used. As the elastic filling material, a relatively soft filling material, for example, a rubber chip made of a natural organic filling material or crushed waste tires can be used. As the hard filling material, for example, sand can be used. Both the hard filling material and the elastic filling material may be filled. In the form shown in FIG. 1, it is preferable that the filling material 12c does not contain a rubber chip and is composed of sand, soil, a natural organic filling material, etc. In this case, the environmental load can be reduced by not containing a rubber chip. As the natural organic filling material, a material obtained by crushing coconut shells can be used. Sand, soil, natural organic filling materials, etc. may be appropriately blended with one kind or a plurality of kinds. By filling the filling materials 11c and 12c between the piles 11b and 12b on the base fabrics 11a and 12a, the artificial turf containing the filling materials 11c and 12c becomes heavy.

[0018] 〈Permeability Coefficient of the Second Artificial Turf 12〉 Here, the permeability coefficient of the second artificial turf 12 is set to be 2 times or more that of the first artificial turf 11. In short, the water permeability of the second artificial turf 12 is higher than that of the first artificial turf 11. As the artificial turf with high water permeability that can be used for the second artificial turf 12, the backing layer for fixing the stitches of the piles 11b and 12b may be provided only at the portions corresponding to the stitches instead of the entire surfaces of the base fabrics 11a and 12a. Also, it may be possible to arrange a strip-shaped backing material only at the portions corresponding to the stitches. Thereby, rainwater permeates from the gaps between the backing layer and the backing material, so the water permeability is improved. Thus, the water permeability can be adjusted by the structure of the backing layer. Also, a pressurized fluid may be ejected from the pile 12b side of the second artificial turf 12 through the base fabric 12a to blow off the backing agent to form water permeable holes in the underlay layer. Also, a large number of water permeable holes may be formed in the one in which the backing agent is applied to the entire surfaces of the base fabrics 11a and 12a. The water permeable holes can be formed, for example, by pressing a heated punching rod from the back side of the base fabric 12a having a backing layer formed on the back surface. The punching rod is preferably heated to about 300°C, for example. Also, innumerable fine holes through which rainwater can permeate may be formed throughout the base fabric 12a.

[0019] Thus, here, the water permeability coefficient of the second artificial turf 12 is set to be two times or more that of the first artificial turf 11. For example, while water permeation holes having a diameter of about 1 mm to 1.5 mm are formed in the base fabric 11a of the first artificial turf 11, water permeation holes having a diameter of about 2 mm to 2.5 mm may be formed in the base fabric 12a of the second artificial turf 12. That is, the water permeation holes formed in the base fabric 12a of the second artificial turf 12 may be made larger than the water permeation holes formed in the base fabric 11a of the first artificial turf 11. Also, the number of water permeation holes formed per unit area in the base fabric 12a of the second artificial turf 12 may be made larger than the number of water permeation holes formed per unit area in the base fabric 11a of the first artificial turf 11. Thereby, the water permeability of the second artificial turf 12 can be made higher than that of the first artificial turf 11. It is preferable that the required water permeability performance is ensured also in the first artificial turf 11, but the water permeability coefficient of the second artificial turf 12 is preferably configured to be two times or more that of the first artificial turf 11.

[0020] Here, a coefficient indicating the degree of permeability of the formation can be applied as the permeability coefficient. Here, Darcy's law, which is the basic law regarding laminar flow in the porous body of the formation, is applied to the first artificial turf 11 and the second artificial turf 12. Here, when expressed as q = KI, q is the specific discharge (or Darcy velocity), I is the hydraulic gradient, and the proportionality constant K is the permeability coefficient. Both q and K have the dimension of velocity. Physically, it is defined as the amount of water passing through a unit cross-sectional area perpendicular to the flow direction in the porous body per unit time under a unit hydraulic gradient. The permeability performance of the first artificial turf 11 and the second artificial turf 12 is evaluated by such a permeability coefficient. In the first artificial turf 11, while ensuring the required permeability performance demanded by the application, it is preferable that the permeability coefficient of the second artificial turf 12 is set to be twice or more that of the first artificial turf 11. Since the permeability coefficient of the second artificial turf 12 is set to be twice or more that of the first artificial turf 11, rainwater easily permeates through the second artificial turf 12. For this reason, microplastics such as fragments of artificial turf flowing out from the first artificial turf 11 and rubber chips contained in the filler are less likely to flow out of the second artificial turf 12 even if they flow into the second artificial turf 12. Also, microplastics such as rubber chips contained in the fragments of artificial turf and the filler are likely to move to and stay in the second artificial turf 12, and are recovered by periodically cleaning the second artificial turf 12. For this reason, microplastics such as rubber chips contained in the fragments of artificial turf and the filler flowing out from the first artificial turf 11 are easily recovered.

[0021] The paving surface 20 of the artificial turf facility 10 is provided with a gradient as a whole for flowing rainwater as described above. During light rainfall, rainwater is mainly discharged in the vertical direction. At this time, since rainwater flows down from the artificial turf surface to the paving surface, microplastics hardly move horizontally. However, in the case of rainfall of a certain amount or more, the voids of the roadbed 21, the crushed stone layer 22, the asphalt layer 23, and the culvert pipe 24 are filled with rainwater, and rainwater that cannot be drained vertically flows down the artificial turf surface in the gradient direction. In this embodiment, it is preferable that in the first region A1 and the second region A2, the gradient is provided such that the second region A2 is on the underwater side of the first region A1.

[0022] The width D2 (see Fig. 2) of the second area A2 where the second artificial turf 12 is laid is preferably such that it can capture fragments of the artificial turf and rubber chips flowing out from the first artificial turf 11. The second area where the second artificial turf 12 is laid may be about 0.2 m to 2.0 m, for example, about 0.5 m to 1.5 m. According to the findings based on the inventor's observation, the rubber chips that flow out can move about 10 cm to 20 cm in half a year. If the width D2 of the second area A2 where the second artificial turf 12 is laid is about 0.2 m to 2.0 m, for example, a width of about 0.5 m to 1.5 m (for example, about 1.0 m), by regularly cleaning the second artificial turf 12 within half a year, most of the rubber chips that have flowed out onto the second artificial turf 12 can be recovered. The second area A2 is preferably such that it can capture fragments of the artificial turf and rubber chips flowing out from the first artificial turf 11, and there is no need for it to be too wide. Also, the area where the second artificial turf 12 is laid may be about 2.5% to 10% of the first area A1 where the first artificial turf 11 is laid and used as a playing area. For example, it may be less than about 5% of the first area A1 where the first artificial turf 11 is laid and used as a playing area. Note that the width and area of the second artificial turf 12 are not limited to the above as long as not otherwise specified.

[0023] The second artificial turf 12 may be provided with a filtering function. Specifically, the second artificial turf 12 may have pores formed therein such that rainwater can permeate through, but microplastics caused by fragments of the artificial turf and rubber chips used for the fillers 11c and 12c, for example, microplastics composed of plastic pieces of 0.2 mm or more, can be captured. In this case, the water permeability coefficient of the second artificial turf 12 may be set so as to ensure such a filtering function. Further, as the artificial turf having a filtering function, for example, a non-woven fabric or felt may be attached as a filter layer to the lower surface side of a base fabric 12a in which pores are formed. The non-woven fabric or felt as the filter layer may have a basis weight and density adjusted to such an extent that it does not inhibit the permeation of rainwater but can capture microplastics. Since the non-woven fabric or felt as the filter layer is provided on the lower surface side of the base fabric 12a, it is less likely to generate abrasion debris due to use in competitions or the like in the artificial turf facility 10. In this case, even when the water permeation holes are large, microplastics caused by fragments (abrasion debris) of the artificial turf and rubber chips can be captured. Further, the base fabric 12a itself may be provided with a filtering function of capturing fragments of the artificial turf and rubber chips. Further, instead of providing the non-woven fabric or felt, the second artificial turf 12 may be provided with a filtering function by filling sand as a filler.

[0024] 〈Enclosing member 13〉 In the form shown in FIGS. 1 and 2, the enclosing member 13 is composed of an impermeable structure installed on the paved surface 20. The enclosing member 13 is provided adjacent to the outer periphery of the second artificial turf 12. The enclosing member 13 is not limited to such a form. As the enclosing member 13, for example, a porous structure having water permeability may be used. Thereby, rainwater can be discharged outside the second artificial turf 12 not only through the drain groove 14 but also through the enclosing member 13. At this time, microplastics such as fragments of the artificial turf and rubber chips that have flowed into the second artificial turf 12 are captured by the porous structure used for the enclosing member 13, so that they are less likely to flow out to the outside of the second artificial turf 12.

[0025] For the porous structure used for the surrounding member 13, for example, a porous curb, a porous board, or the like can be used. Further, as the surrounding member 13, a non-permeable structure such as a non-permeable curb, a plate wall, or a plastic board may be used. When a non-permeable structure is used as the surrounding member 13, as shown in FIG. 1, the drain groove 14 may be provided inside the surrounding member 13. In this case, the rainwater blocked by the non-permeable structure is drained from the drain groove 14 provided inside the surrounding member 13. When a permeable structure is used as the surrounding member 13, the drain groove 14 may be provided either inside or outside the surrounding member 13.

[0026] In addition, since there is a space corresponding to the area of the second artificial turf 12, if rubber chips are not used as the filling material in the second artificial turf 12, it is difficult for the rubber chips of the first artificial turf 11 to bounce and scatter outside. Therefore, the height of the structure as the surrounding member 13 may be about 20 cm, such as that used as a sidewalk boundary block. On the other hand, when rubber chips are used as the filling material in the second artificial turf 12, the height of the structure as the surrounding member 13 should be 50 cm or more. This makes it easier to suppress the outflow to the outside due to the rubber chips of the second artificial turf 12 bouncing and scattering. Note that the surrounding member 13 may be continuous with the outer periphery of the second artificial turf 12 or may have a discontinuous part in part.

[0027] FIG. 3 is a schematic cross-sectional view of another form of the artificial turf facility 10. In the artificial turf facility 10 shown in FIG. 3, a fence 43 such as a backstop net is provided around the artificial turf ground. The fence 43 is supported by, for example, upright posts 44 erected at intervals. In the form shown in FIG. 3, as the surrounding member 13, a sheet body 32 having water permeability and microplastic capturing properties is used, and is attached along the fence 43 inside the fence 43 so that rainwater passing through the fence 43 passes through the lower part of the sheet body 32. As an example of such a sheet body 32, a non-woven fabric is used in FIG. 3. Thus, the surrounding member 13 is preferably provided outside the second artificial turf 12 so as to surround the second artificial turf 12, and such a sheet body 32 may be used.

[0028] The non-woven fabric as the sheet body 32 is composed of a material having water permeability and a filtering function. The water permeability coefficient of the non-woven fabric used for the sheet body 32 is, for example, from the viewpoint of ensuring required water permeability, for example, 10 -5 m / s or more, preferably 10 -4.5 m / s or more, more preferably 10 -4 m / s or more. Also, from the viewpoint of capturing required fine particles such as wear debris of the first artificial turf 11 and the second artificial turf 12, 10 -2 m / s or less, preferably 10 -2.5 m / s or less, more preferably 10 -3It can be below m / s. In this case, the sheet body 32 has, for example, the same water permeability as a layer of sand, can ensure the required water permeability of the artificial turf 12, and can effectively capture the wear of the fine artificial turf. By ensuring the water permeability of the sheet body 32, the drainage of the ground of the artificial turf is improved. For example, it becomes difficult for water to float on the ground of the artificial turf. That is, also in the embodiment of FIG. 3, not only from the drain groove 14, but also rainwater can be discharged to the outside through the sheet body as the surrounding member 13, so the drainage property is improved. On the other hand, microplastics such as fragments of artificial turf and rubber chips flowing into the second artificial turf 12 are less likely to flow out to the outside of the surrounding member 13. When such a water-permeable surrounding member 13 is used, the drain groove 14 may be provided inside or outside the surrounding member 13.

[0029] The non-woven fabric used for the sheet body 32 is preferably selected from materials having the required durability from the viewpoints of weather resistance and wear resistance so that the service life is about 10 years. Further, in order to ensure the performance more reliably, the sheet body 32 may be operated so that it can be replaced in 3 to 5 years.

[0030] 〈Drain groove 14〉 The drain groove 14 is provided under the second artificial turf 12. In the forms shown in FIGS. 1 and 2, the drain groove 14 is a U-shaped groove 14b with a water-permeable lid 14a attached. For example, in an existing artificial turf facility where a U-shaped groove 14b is provided around the artificial turf ground, artificial turf with a water permeability twice that of the original may be laid so as to cover the U-shaped groove 14b. In this case, the second artificial turf 12 may be laid according to the width of the U-shaped groove 14b of the existing artificial turf facility. Further, the drain groove 14 provided under the second artificial turf 12 is not limited to the U-shaped groove 14b. Also, for example, it may be a water-permeable culvert instead of the U-shaped groove 14b.

[0031] In this way, since the drain 14 is provided under the second artificial turf 12, the drainage of the second artificial turf 12 is improved. Therefore, it is difficult for water to accumulate in the second artificial turf 12. For this reason, it is less likely that microplastics such as fragments of artificial turf and rubber chips flowing into the second artificial turf 12 will float in the water accumulation and flow out of the ground. Furthermore, a filter may be provided at the outlet of the drain 14 or the like so that the microplastics flowing out into the drain 14 are further captured. The lid 14a of the U-shaped groove 14b constituting the drain 14 may be provided with a filter configured to allow rainwater to pass through but further capture microplastics, for example. Even when an underground culvert is installed, it is preferably covered with a filter material (such as crushed stone) capable of capturing microplastics at least at the upper part of the underground culvert. Also, for the outlet part of the drain 14, instead of laying the second artificial turf 12, an openable and closable lid may be attached to the outlet part of the drain 14, and a filter (non-woven fabric) may be installed in the drain 14.

[0032] Also, it is preferable that there is a contrast in color tone between the first artificial turf 11 and the second artificial turf 12. The contrast in color tone is preferably such that it can be visually confirmed. For example, the first artificial turf 11 laid in the first area A1 may be dark green, and the second artificial turf 12 may be light green. Also, the first artificial turf 11 and the second artificial turf 12 may be different colors. As a result, when the wear debris of the first artificial turf 11 moves to and accumulates on the second artificial turf 12, a change in color tone occurs in the second artificial turf 12. For this reason, it becomes easier to confirm that wear debris has accumulated on the second artificial turf 12. The wear debris can be removed and cleaned, for example, by a suction machine such as a vacuum cleaner. For this reason, by checking the color tone of the second artificial turf 12, it is advisable to focus on cleaning the locations where wear debris has accumulated, and the cleaning becomes easier.

[0033] Note that the rubber chips may be included only in the first area A1 where the first artificial turf 11 is laid. That is, the filler 12c of the second artificial turf 12 may not include rubber chips and may contain only non-fill or sand. The first area A1 is arranged at the center of the artificial turf facility 10 and mainly constitutes the playing area. Therefore, rubber chips may be included in the filler 11c to improve the performance required in sports such as cushioning. On the other hand, it is desirable that the second artificial turf 12 has a function of allowing rainwater to permeate and capturing microplastics, and it is desirable that the filler 12c does not contain rubber chips that become microplastics. However, since the filler of the first artificial turf 11 can move to the second artificial turf 12, in the future, the filler 12c of the second artificial turf 12 will not be completely free of rubber chips. However, the ratio of rubber chips contained in the filler 12c of the second artificial turf 12 is maintained to be less than the ratio of rubber chips contained in the filler 11c of the first artificial turf 11.

[0034] As described above, various aspects of the artificial turf facility disclosed herein have been described. However, the artificial turf facility disclosed herein is not limited to the above-described embodiments and modifications, unless otherwise specified. In addition, the components of the various embodiments and modifications described above can be appropriately combined as long as they do not interfere with each other.

[0035] The present disclosure (1) relates to an artificial turf facility. Here, the artificial turf facility in the present disclosure (1) has a first artificial turf laid in a first area and a second artificial turf laid in a second area adjacent to the outer periphery of the first area, and the permeability coefficient of the second artificial turf is 2 times or more that of the first artificial turf.

[0036] The present disclosure (2) is the artificial turf facility described in the present disclosure (1), wherein the second artificial turf has a filtering function.

[0037] The present disclosure (3) is the artificial turf facility described in the present disclosure (1) or (2), wherein a wall is provided standing adjacent to the outside of the second artificial turf, and a drainage ditch is provided below the second artificial turf.

[0038] In the artificial turf facility according to any one of the above (1) to (3) of the present disclosure (4), a contrast in color tone is provided between the first artificial turf and the second artificial turf.

Explanation of Signs

[0039] 10 Artificial turf facility 11 First artificial turf 11a Base fabric of the first artificial turf 11 11b Pile of the first artificial turf 11 11c Filling material 12 Second artificial turf 12a Base fabric of the second artificial turf 12 12b Pile of the second artificial turf 12 12c Filling material of the second artificial turf 12 13 Enclosing member 14 Drainage ditch 14a Cover 14b U-shaped groove 20 Paved surface 21 Roadbed 22 Crushed stone layer 23 Asphalt layer 24 Culvert pipe A1 First area A2 Second area D2 Width of the second area A2

Claims

1. It has a first artificial turf laid in a first area set in the central part and a second artificial turf laid in a second area adjacent to the outer periphery of the first area, and the water permeability coefficient of the second artificial turf is 2 times or more that of the first artificial turf, the second area is inclined on the artificial turf surface so as to be on the underwater side of the first area, the second artificial turf is an artificial turf facility in which sand is filled as a filler filled between piles on the surface of a base fabric.

2. The first artificial turf and the second artificial turf each have a base fabric formed with fine water permeable holes throughout, and piles fixed to the base fabric, and the number of water permeable holes formed per unit area in the base fabric of the second artificial turf is larger than the number of water permeable holes formed per unit area in the base fabric of the first artificial turf, or the water permeable holes formed in the base fabric of the second artificial turf are larger than the water permeable holes formed in the base fabric of the first artificial turf, The artificial turf facility according to claim 1.

3. It has a first artificial turf laid in a first area set in the central part and a second artificial turf laid in a second area adjacent to the outer periphery of the first area, the second area is inclined on the artificial turf surface so as to be on the underwater side of the first area, the first artificial turf and the second artificial turf each have a base fabric formed with fine water permeable holes throughout, and piles fixed to the base fabric, and the number of water permeable holes formed per unit area in the base fabric of the second artificial turf is larger than the number of water permeable holes formed per unit area in the base fabric of the first artificial turf, or the water permeable holes formed in the base fabric of the second artificial turf are larger than the water permeable holes formed in the base fabric of the first artificial turf, and the water permeability coefficient of the second artificial turf is 2 times or more that of the first artificial turf. The artificial turf facility.

4. The artificial turf facility according to any one of claims 1 to 3, wherein a non-woven fabric or felt is attached to the lower surface of the second artificial turf.

5. A surrounding member is provided standing adjacent to the outside of the second artificial turf, and a drain is provided below the second artificial turf, The artificial turf facility according to any one of claims 1 to 4, wherein the surrounding member is a porous structure.

6. The artificial turf facility according to any one of claims 1 to 5, wherein a contrast in color tone is provided between the first artificial turf and the second artificial turf.

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