JP6178485B1 - Lawn ground with watering system - Google Patents

Abstract

The present invention provides a lawn ground with a watering system that can reduce labor and cost during construction and maintenance of the watering system, and can cool the lawn ground effectively without any troubles such as competition. In a lawn ground with a watering system of the present invention, a water supply pipe is disposed in a gap portion of a plate-like rigid structure installed on a base, and an artificial lawn is placed on the plate-like rigid structure. Or when natural lawn is installed and water is supplied to the flexible nozzle 50 for watering connected to the water supply pipe 40, water droplets are ejected from the outlet 59 while the tube 54 of the flexible nozzle 50 for watering randomly vibrates. It is characterized by being sprinkled. [Selection] Figure 5

Description

  The present invention relates to a lawn ground with a watering system.

  Generally, a watering device used for watering a lawn ground has a water supply pipe embedded in a base made of asphalt concrete or the like located under the lawn ground surface, and a nozzle connected to the water supply pipe. Yes. And if water is supplied to the said water supply pipe from a water supply source, water will be ejected from the front-end | tip of the said nozzle, and watering will be performed.

  Patent Literature 1 describes the following technique as a field watering device. That is, a water supply pipe connected to a water supply pump is embedded in the base, and a movable watering head is attached to the water supply pipe. When watering is not performed, the watering head is deeply buried in the base. When watering, the watering head floats on the ground due to the water pressure of the water supply pump, and water is ejected from the watering head.

  Patent Document 2 describes the following technique as a spray device in a system for controlling a ground environment. That is, a water supply pipe connected to a water supply pump is embedded in the base, and a rising pipe reaching the base surface is attached to the end of the water supply pipe. A fine mist spray nozzle is attached to the tip of the riser tube. When spraying, water is supplied from the water supply pump to the water supply pipe, and water is diffused as fine mist from the fine mist spray nozzle through the riser pipe.

JP-A-8-242710 JP 2006-177130 A

  However, the present inventors have recognized that the watering device described in Patent Document 1 and the spray device described in Patent Document 2 have the following problems.

  In the watering device described in Patent Document 1, the water supply pipe is embedded in the base, and the watering head is also deeply embedded in the base when watering is not performed. In the spray device described in Patent Document 2, the water supply pipe is embedded in the base. Therefore, when constructing a watering system as described above on an existing lawn ground, it is necessary to dug the base and perform piping work, which requires labor and cost. In addition, it is necessary to dig up the base during maintenance of the watering head and the fine mist spray nozzle, which also requires labor and cost.

  Moreover, in the watering apparatus of patent document 1, when watering, a watering head floats on the ground. Therefore, when watering, the use of the ground must be interrupted, which causes problems such as competition.

  Moreover, in the spraying apparatus described in Patent Document 2, water is diffused as a fine mist from the fine mist spray nozzle. Here, there is a problem that fine fog is easily affected by wind and inferior in cooling effect. Furthermore, when spraying fine mist, compared with the case where water is sprinkled, there is a problem that the water spray area is as narrow as about 1 to 1.5 m in radius and the ground cannot be cooled effectively.

  In view of the above problems, the present invention can reduce the labor and cost at the time of construction and maintenance of the watering system, and further provide a lawn ground with a watering system that can effectively cool the lawn ground without troubles such as competition. The purpose is to provide.

The gist configuration of the present invention for solving the above-described problems is as follows.
(1) Base and
A plate-like rigid structure installed on the substrate and having a gap portion;
Artificial lawn or natural lawn installed on the plate-like rigid structure;
Have
The artificial lawn has a base fabric, a plurality of piles planted on the base fabric, and a packed layer in which granular materials are filled between the plurality of piles on the base fabric,
The natural lawn has a soil layer and a natural lawn with roots extending in the soil layer and lawn leaves extending from the surface of the soil layer,
A water supply pipe is disposed in the gap portion of the plate-like rigid structure,
A flexible nozzle for watering is connected to the water supply pipe,
The flexible nozzle for watering has a base portion embedded in the filling layer or the soil layer, and a tube extending from the base portion and projecting from the filling layer or the soil layer and having a tip serving as a spout. ,
By supplying water from the water supply pipe to the flexible nozzle for watering, water drops spout from the jet outlet while the tube vibrates randomly, and water can be scattered to the artificial lawn or the natural lawn. A lawn ground with a watering system.

  (2) The lawn ground with a watering system according to (1), wherein the base is a plate-like member.

  (3) The plate-like rigid structure is provided with a watering system according to the above (1) or (2), which is a drainage material made of a three-dimensional network in which synthetic resin strands extend in a random loop shape. Lawn ground.

  The lawn ground with a watering system of the present invention can reduce labor and cost during construction and maintenance of the watering system, and can effectively cool the lawn ground without any troubles such as competition.

It is a schematic cross section of the lawn ground 100 with a watering system by 1st embodiment of this invention. (A) is the perspective view of the plate-shaped rigid structure 20 before providing the space | gap for fitting the water supply pipe 40, (B) is II sectional drawing of (A), (C) These are sectional drawings of the plate-shaped rigid structure 20 after providing the space | gap for fitting the water supply pipe | tube 40. FIG. It is a top view of the lawn ground 100 with a watering system shown in FIG. (A) is a top view of the flexible nozzle 50 for watering in FIG. 1, (B) is the side view, (C) is a suitable front-end | tip of the tube of the flexible nozzle for watering. It is a perspective view which shows a shape. It is a figure explaining the state which a water droplet ejects from the jet nozzle 59, while the tube 54 of the flexible nozzle 50 for watering in FIG. 1 vibrates at random. It is a schematic cross section of the lawn ground 200 with a watering system by 2nd embodiment of this invention. (A)-(C) are process drawings explaining the construction method of the lawn ground 100 with a watering system of FIG. (D)-(E) is process drawing explaining the construction method of the lawn ground 100 with a watering system of FIG. 1 following FIG. 7-1 (A)-(C).

(First embodiment)
With reference to FIG. 1, the lawn ground 100 with a watering system by 1st embodiment of this invention is demonstrated. The lawn ground 100 with a watering system includes a base 10, a plate-like rigid structure 20, an artificial lawn 30, a water supply pipe 40, and a flexible nozzle 50 for watering.

(Base)
Referring to FIG. 1, the base 10 can be composed of crushed stone and a caking agent. For example, the base 10 is formed by connecting and crushing crushed stone in a mesh shape with a fixing agent and then flattening the surface. can do. More preferably, using a large-diameter crushed stone as a crushed stone and a small-diameter crushed stone having a diameter smaller than this, after laying the large-diameter crushed stone, the small-diameter crushed stone is spread, and the small-diameter crushed stone with an elastic binder. The bodies are connected together in a mesh shape and consolidated together. Thereby, the surface of the board | substrate 10 can be made more flat. As the caking agent, a synthetic resin-containing aqueous binder or a synthetic resin-containing solvent-based binder can be suitably used. As the latter, for example, a urethane binder in which a solvent is contained in a urethane resin can be used. The base 10 is not limited to the one made of crushed stone as described above, and may be any as long as the surface can be formed into a flat surface. For example, the base 10 may be formed by placing asphalt concrete or permeable concrete. May be formed.

(Plate-like rigid structure)
The plate-like rigid structure 20 has a gap and is installed on the base 10 as shown in FIG. A water supply pipe 40, which will be described later, is disposed in the gap portion. In the present invention, it is important that the water supply pipe 40 is not embedded in the base 10 as described above. Thereby, the effort and cost at the time of construction and maintenance of a watering system can be reduced.

  The shape of the plate-like rigid structure 20 is not particularly limited as long as the water supply pipe can be disposed in the gap portion, but the thickness is appropriately selected according to the watering place. It is preferable to make it thicker. The plate-like rigid structure 20 is not particularly limited as long as it can withstand the load of a sand spreader, a competitor, a maintenance person, etc. used when forming the filling layer 36 to be described later. The well-known or arbitrary drainage material and cushioning material provided in between can be mentioned. When the plate-like rigid structure is a cushion material, it also has an additional effect of shock absorption.

  In the present embodiment, from the viewpoint of further increasing the drainage effect, the plate-like rigid structure 20 is a drainage material made of a three-dimensional network in which synthetic resin strands extend in a random loop shape. As an example, the structure shown in FIGS. 2A, 2B, and 2C can be given.

  As shown in FIGS. 2 (A) and 2 (B), the plate-like rigid structure 20 before providing a gap for fitting the water supply pipe 40 is a random number of monofilaments made of hard synthetic resin such as polypropylene. It is a vertically long plate-like structure formed by being deposited in a loop shape. The plate-like rigid structure 20 includes a thickness portion 24, and an upper coating layer 28A and a lower coating layer 28B that cover the upper and lower sides thereof.

  The thick portion 24 is formed by extending a thick monofilament 22A in a spiral shape. A plurality of rows of spiral large-diameter monofilaments 22A are arranged adjacently so that their central axes are parallel to each other, and as a result, the cylindrical cavities 26 are partitioned over a plurality of rows.

  The upper coating layer 28A and the lower coating layer 28B are formed by depositing the thin monofilaments 22B in a looped state. Therefore, the gaps are uniformly distributed in the upper coating layer 28A and the lower coating layer 28B constituting the surface layer portion of the plate-like rigid structure 20.

  This plate-like rigid structure 20 has both a function of collecting water in the gap (line-like network) of the covering layer portion and a function of passing water through the cylindrical cavity portion 26 of the thickness portion 24, and has a high pressure resistance. . Details of the plate-like rigid structure 20 are described in Japanese Patent Application Laid-Open No. 2002-275876.

  As shown in FIG. 2 (C), the plate-like rigid structure 20 used in the present embodiment has a three-dimensional network shown in FIGS. 2 (A) and 2 (B) as a basic structure for fitting the water supply pipe 40. A gap (groove) is provided. That is, one row of the plurality of rows of cylindrical cavities 26 shown in FIGS. 2A and 2B does not exist, and the lower coating layer 28 of the portion does not exist (FIG. 2C). reference). This portion becomes a gap for fitting the water supply pipe 40. The plate-like rigid structure 20 having such voids can be manufactured by controlling the injection of the large monofilament 22A and the small monofilament 22B.

  The gap between the strands of the plate-like rigid structure 20 may be filled with sand. Here, the thing similar to the sand which can be contained in the filling layer 36 mentioned later can be used.

(Artificial lawn)
Referring to FIG. 1, the artificial lawn 30 is installed on the plate-like rigid structure 20. The artificial lawn 30 includes a base cloth 32, a plurality of piles 34 planted on the base cloth 32, and a filling layer 36 in which granular materials are filled between the plurality of piles 34 on the base cloth 32. .

  The type of the base cloth 32 is not particularly limited, and a base cloth used for a general artificial lawn can be preferably used. For example, a plain woven cloth made of polypropylene or polyethylene can be mentioned, but the material and weaving can be used. The direction may be changed, a nonwoven fabric may be used, and other sheet bodies may be used. Further, a backing material (not shown) for fixing the pile 34 to the base cloth 32 such as styrene / butadiene rubber (SBR) is provided on the back surface of the base cloth 32. Further, as shown in FIG. 1, the base cloth 32 and the backing material in the present embodiment are provided with holes for allowing a socket 42 described later to pass therethrough in advance.

  As the pile 34, an arbitrary or known artificial grass pile can be used, and for example, one or a combination of two or more selected from a monofilament pile, a film yarn pile, and a split yarn pile can be used. The material of the pile 34 is not particularly limited, and various synthetic resins such as olefin synthetic resins such as polyethylene and polypropylene, polyamide, polyvinylidene chloride, and polyester can be suitably used. The planting density of the piles 34 is not particularly limited, and may be set as appropriate as in the past.

  The thickness of the filling layer 36 is not particularly limited, but is preferably 50 mm or more from the viewpoint of competitiveness and the like. Moreover, the upper limit of the thickness of the filling layer 36 is not particularly limited, but is about 80 mm in consideration of the pile length of a general artificial turf. Moreover, it is preferable that the height of the pile 34 is a height at which the pile 34 protrudes from the surface of the filling layer 36 by about 10 to 30 mm.

  The granular material constituting the packed bed 36 is not particularly limited, and any arbitrary or known granular material for artificial turf can be used. For example, various elastic granular materials such as natural or synthetic rubber chips, foamed or non-foamed synthetic resin granules, cork chips, and pulverized tires, and sand can be suitably used. From the viewpoint of suppressing the increase in the temperature of the surface of the lawn ground, and from the viewpoint of imparting appropriate stickiness and shock absorption to the packed bed, the granular material constituting the packed bed 36 is a powder of mesocarp skin of palm fruit It preferably contains sand. In addition, about the mixing ratio of the said powder and sand, it can adjust suitably suitably. Below, the said powder and sand are demonstrated.

  As an embodiment of the powder, a powder obtained by pulverizing the mesocarp of coconut fruit can be mentioned. Coco fruit is covered with a hard shell called pericarp. There is a relatively soft mesocarp inside the outer pericarp and an inner pericarp further inside. Inside the endosperm is a solid endosperm layer, and the space near the center contains liquid endosperm. In this embodiment, powder obtained by collecting and pulverizing only the mesocarp is used.

  An example of the method for producing the powder will be described. First, coconut fruits are soaked in water for a certain period to remove salt and potassium. Thereafter, mesocarp is collected from the coconut fruit. The collected mesocarp is pulverized into a powder. Thereafter, the obtained powder is passed through a sieve having a predetermined opening to remove the fibrous mesothelium from the powder. Thus, the powder used by this embodiment can be manufactured. In order to adjust the moisture content in the powder, the collected mesocarp or the pulverized powdered mesocarp may be dried under appropriate conditions.

  The maximum particle size of the powder is preferably 6.0 mm or less, and more preferably 2.0 mm or less. This is because the granular material filled between the piles 34 of the artificial lawn is generally suppressed to a particle size of 6.0 mm or less. The mesh opening of the sieve to be applied to the powder is preferably in the range of 0 mm to 9.5 mm. By doing in this way, the average particle diameter D50 of powder can be 1.0 mm or less.

  The water content of the powder is preferably 15 to 50% by mass. If it is 15 mass% or more, high temperature can fully be suppressed and caking property fall can be prevented. If it is 50 mass% or less, the caking property fall can be prevented.

  The above powder is not limited to a powder obtained by pulverizing the mesocarp of coconut fruit, and the same effect can be obtained by pulverizing the mesocarp of a fruit of a palm plant such as date palm, oil palm, and sago palm.

  As said sand, it is preferable to use at least dredged sand, and it is more preferable to use dredged sand alone. Since cinnabar is hard to consolidate, it is easy to maintain the high shock absorption obtained by combining with pulverized coconut fruit mesocarp. Moreover, it is preferable also from a viewpoint of maintaining drainage and maintaining water retention by voids.

  Examples of the sand (namely, debris having a particle size of 1/16 to 2 mm) include crushed stone, river sand, mountain sand and the like using various rocks as a raw material in addition to dredged sand. However, river sand and mountain sand generally contain silt, clay, and organic matter (such as animal and plant septics) at the stage immediately after collection. It is preferable to do.

  The particle size distribution of the sand is not particularly limited, but the particle size variation is preferably small and is preferably in the range of 1 to 2 mm. For example, in the case of dredged sand, it is preferable to use one or a combination of two or more kinds of JIS standard sand, No. 2 dredged sand, No. 3 dredged sand, and No. 4 dredged sand.

(Water supply pipe)
With reference to FIG. 1, the water supply pipe 40 is disposed in a gap portion of the plate-like rigid structure 20. As described above, the effect of the configuration in which the water supply pipe 40 is not embedded in the base 10 is as described above. Further, the water supply pipe 40 has an upward socket 42 for connecting a flexible nozzle 50 for watering to be described later. In the present embodiment, since a large number of gaps are distributed in the upper covering layer 28 </ b> A that constitutes the upper surface of the plate-like rigid structure 20, the socket 42 can be inserted through the gaps. However, when the plate-like rigid structure is not a three-dimensional network like the present embodiment, the plate-like rigid structure has a hole for inserting a socket in addition to the gap for arranging the water supply pipe. Is provided.

  The water supply pipe 40 is connected to a water supply source. It does not specifically limit as a water supply source, For example, the tap of a general water supply with a low water pressure may be sufficient. From the viewpoint of further increasing the amount of water supplied to the water supply pipe and the water pressure, it is preferable to use a water supply pump 44 driven by a motor or the like as shown in FIG. In the present invention, the watering behavior of water droplets can be controlled by appropriately adjusting the water amount and water pressure, and the shape and material of the watering flexible nozzle 50 described later.

  The dimensions, length, and arrangement method or arrangement interval of the water supply pipe 40 are appropriately set in consideration of the size of the lawn ground and the size of the water spray area from the single water spray flexible nozzle 50. can do. Similarly, the number and interval of the sockets 42 can be appropriately set in consideration of the size of the lawn ground and the size of the water spray area from the water spray flexible nozzle 50. For example, as the water supply pipe 40, a vinyl pipe or a vinyl hose having a diameter of about 6.0 to 15.0 mm can be used.

(Flexible nozzle for watering)
Referring to FIGS. 4A, 4B, and 5, the watering flexible nozzle 50 has a base 52 embedded in the filling layer 36, a base 52 extending from the base 52, and a tip protruding from the filling layer 36. A tube 54 serving as a jet port 59. Further, the watering flexible nozzle 50 has a connecting portion 56. By connecting the connecting portion 56 and the socket 42, the water spraying flexible nozzle 50 is connected to the water supply pipe 40. In the present embodiment, as shown in FIG. 5, it is important that the watering flexible nozzle 50 is not embedded in the base 10 and that the tube 54 is not completely embedded in the filling layer 36. Thereby, the effort and cost at the time of the maintenance of the flexible nozzle for watering can be reduced.

  When water is supplied from the water supply pipe 40 to the flexible nozzle 50 for watering, first, water flows out in a columnar shape from the outlet 59 at the tip of the tube 54. Then, when the water amount and the water pressure are gradually increased, the tube 54 vibrates randomly with a certain value as a boundary as shown in FIG. Water can be scattered to the ground. The area where the water can be sprinkled depends on the amount of water supplied from the water supply source and the water pressure. For example, when a water supply pump is used, a radius of 3 m at the maximum with respect to the installation position of the watering flexible nozzle 50 is used. Water droplets are scattered in the region of the degree. Thereby, a lawn ground can be cooled effectively. In addition, the water droplet in this invention has a particle size of at least 100 micrometers or more, and is a thing larger than a mist. Therefore, in this invention, compared with the case where fog is used, there is little influence of a wind.

  Regarding the amount of water and the water pressure during turbulent watering, the amount of water is preferably 0.3 to 1.0 L / min for each nozzle, and the water pressure is 0.1 to 0.5 MPa at the closest part to the nozzle in the water supply pipe. It is preferable to do. If the water volume and water pressure are above the lower limit, stable turbulent water spraying is easy to achieve, and if the water volume and water pressure are below the upper limit value, even if water spraying continues for a long time, the tip wear due to excessive nozzle vibration is suppressed, and This is because the function of the system can be maintained.

  Below, with reference to FIG. 4 (A), (B) and FIG. 5 suitably, an example of the raw material and shape of the flexible nozzle 50 for watering which implement | achieves such a watering behavior is demonstrated.

  First, as shown in FIG. 5, the watering flexible nozzle 50 is flexible enough to realize random watering behavior and not interfere with competition even if the tube 54 protrudes from the filling layer 36. It is important to have The specific material is not particularly limited as long as it has such flexibility, and examples thereof include olefin synthetic resins such as polyethylene and polypropylene, and various synthetic resins such as polyamide, polyvinylidene chloride, and polyester. .

  Although the shape of the connection part 56 will not be specifically limited if it can connect to the socket 42, As an example, the connection part 56 shown to FIG. 4 (A), (B) can be mentioned. The connecting portion 56 is a cylindrical tube having an outer diameter larger than that of the tube 54, and a flow path 58 </ b> A for passing water from the water supply pipe 40 is formed. From the viewpoint of ensuring the strength of the connecting portion 56, the outer diameter of the tube is preferably 5.5 to 6.5 mm, and the inner diameter is preferably 2.5 to 3.5 mm.

  Referring to FIGS. 4A and 4B, in the base 52, a flow path 58 </ b> B communicating with the flow path 58 </ b> A in order to flow the water supplied from the water supply pipe 40 through the connecting portion 56 to the tube 54. Is formed. The shape and diameter of the flow path 58B are not particularly limited, but can be the same as the flow path 58C provided in the tube 54 described later.

  From the viewpoint of facilitating fixing of the watering flexible nozzle 50 in the filling layer 36, the base 52 is preferably a plate-like member as shown in FIGS. The shape of the plate member is not particularly limited, and can be appropriately designed from the above viewpoint. As an example, the base 52 shown in FIGS. 4A and 4B is a plate-like member having a first plate-like portion 52A on the connection portion 56 side and a second plate-like portion 52B on the tube 54 side.

  In the plan view of FIG. 4 (A), the first plate-like portion 52A preferably has a width in the direction perpendicular to the extending direction of the tube 54 of 10.0 to 18.0 mm from the viewpoint of fixing. . 4B, the thickness of the first plate-like portion 52A is the same as the outer diameter of the tube that is the connecting portion 56. However, the thickness gradually decreases toward the second plate-like portion 52B.

  Next, in the plan view of FIG. 4A, the second plate-like portion 52 </ b> B can have a tapered shape in which the width in the direction perpendicular to the extending direction of the tube 54 gradually decreases toward the tube 54. Further, as shown in FIG. 4B, the thickness of the second plate-like portion 52B can be the same as the outer diameter of the tube 54 described later.

  4 (A) and 4 (B), the tube 54 causes water supplied from the water supply pipe 40 via the connecting portion 56 and the base portion 52 to be ejected as water droplets from the jet outlet 59 at the tip of the tube 54. Therefore, a flow path 58C communicating with the flow path 58B is formed. From the viewpoint of realizing the turbulent water spray behavior as described above, and ensuring that the tube 54 is mixed in the pile while ensuring its strength, the outer diameter of the tube 54 is 1.0. The inner diameter of the tube 54 can be about 0.8 to 2.0 mm, and the length of the portion of the tube 54 that protrudes from the filling layer 36 is 10.0 to It is preferable to set it as 30.0 mm.

  From the viewpoint of ejecting water droplets from the ejection port more randomly, the shape of the tip of the tube 54 is preferably a semi-cylindrical shape having a length of 1.0 to 20.0 mm as shown in FIG. By adopting such a shape, it becomes easy for water droplets to be ejected randomly from the tip of the tube 54 in all directions.

  According to the lawn ground 100 with a watering system of the present embodiment described above, water is supplied from the water supply pipe 40 to the flexible nozzle 50 for watering, so that water drops are generated from the jet outlet 59 while the tube 54 vibrates randomly. It is possible to spray water and scatter water to the artificial lawn 30. Therefore, the artificial lawn 30 can be effectively cooled. In addition, since the water supply pipe 40 is provided in the plate-like rigid structure 20 without being embedded in the base 10, construction and maintenance are easy. Moreover, the tube 54 is mixed in the pile of the artificial lawn and does not hinder competition or the like.

  In addition, in the lawn ground 100 with a watering system of this embodiment, as shown in FIG. 1, the said tube 54 protrudes from the filling layer 36 in the state which is not sprinkling from the flexible nozzle 50 for watering. Specifically, the tube 54 has a rigidity that does not cause bending such that the tip of the tube 54 contacts the filling layer 36. For this reason, the problem that the particulate matter of the filling layer 36 fits into the opening of the flow path 58C at the tip of the tube 54 is less likely to occur.

  Further, the tube 54 is preferably provided with a rigidity higher than that of the pile 34 of the artificial lawn 30. By providing the tube 54 with greater rigidity than the pile 34, even when the vibrating tube 54 contacts the adjacent pile 34 in a state where water is sprayed from the watering flexible nozzle 50 as shown in FIG. 5. It is difficult for the movement of the tube 54 to be disturbed, and water can be efficiently sprayed.

(Second embodiment)
With reference to FIG. 6, the lawn ground 200 with a watering system by 2nd embodiment of this invention is demonstrated. The lawn ground 200 with a watering system includes a base 10, a plate-like rigid structure 20, a natural lawn 70, a water supply pipe 40, and a flexible nozzle 50 for watering. In the second embodiment, the same members as those in the first embodiment will be described using the same reference numerals. In the following, the description of the first embodiment is used except that the natural lawn 70 is used instead of the artificial lawn 30.

(Natural lawn)
Referring to FIG. 6, natural lawn 70 is installed on plate-like rigid structure 20. The natural lawn 70 includes a soil layer 72 and a natural lawn 78 in which a root 74 is stretched in the soil layer 72 and a turf leaf 76 extends from the surface of the soil layer 72.

  The soil layer 72 can have a general composition for growing or cultivating natural turf. The soil layer 72 preferably contains a fertilizer for growing the natural turf 78. The fertilizer may exist uniformly dispersed in the soil layer 72, or the fertilizer is sprayed after the main soil layer 72 is formed by the mixed granular material, and the upper layer of the soil layer 72. May be present locally. The kind of fertilizer should just use the arbitrary or well-known fertilizer for growing natural turf. The amount of fertilizer added is not particularly limited as long as it is appropriately adjusted so that natural turf is properly grown. The soil layer 72 preferably contains fine sand.

  From the viewpoint of preventing the soil from falling into the void portion of the plate-like rigid structure 20, it is preferable to lay a sheet body 80 such as a nonwoven fabric on the plate-like rigid structure. In this case, the sheet body 80 is provided with a hole through which the socket 42 passes.

  The type of natural turf 78 is not particularly limited. Examples of summer turf include Bermudagrass such as Tifton, Nosyba, Kouraishiba, etc., and winter turf include bentgrass, ryegrass, bluegrass such as Kentucky, fescue, etc. And can be one or a combination of two or more selected from these.

  The height of the turf leaf 76 is not particularly limited, but can be about 25 to 40 mm from the viewpoint of obtaining the texture and softness of the natural turf 78.

  Also in this embodiment, the same effect as the first embodiment can be obtained. Although natural turf does not heat up as much as artificial turf, according to this embodiment, not only the lawn itself can be cooled, but also the effect of lowering the athlete's perceived temperature can be expected due to the watering effect.

(Construction method of lawn ground with watering system)
With reference to (A)-(E) of FIGS. 7-1 and FIGS. 7-2, the construction method of the lawn ground 100 with a watering system by 1st embodiment of this invention is demonstrated.

  First, as shown in FIG. 7-1 (A), the crushed stone is connected in a mesh form with a fixing agent to be consolidated and integrated, and then the surface 10 is flattened to form the base 10. Thereafter, the water supply pipe 40 is disposed on the base 10. Further, the water supply pipe 40 is connected to a water supply source (not shown).

  Next, as shown in FIG. 7-1 (B), the plate-like rigid structure 20 shown in FIG. 2 (C) is fitted into the water supply pipe 40 arranged on the base 10. Thereby, the water supply pipe 40 is disposed in the gap portion of the plate-like rigid structure 20. Thereafter, the gaps between the strands of the plate-like rigid structure 20 may be filled with sand. Examples of the filling method include an operation of spreading sand on the plate-like rigid structure 20 and pushing the sand into the gap by a tool such as a brush or a sand spreader or manually.

  Next, as shown in FIG. 7C, an artificial turf in which a plurality of piles 34 are planted on the base cloth 32 is installed on the plate-like rigid structure 20. At this time, the socket 42 is passed through a hole provided in the base fabric 32.

  Next, as shown in FIG. 7-2 (D), the flexible nozzle 50 for watering shown in FIGS. 4 (A) and 4 (B) is connected to the socket 42 provided in the water supply pipe 40.

  Next, as shown in FIG. 7-2 (E), a granular material is filled between the plurality of piles 34 on the base fabric 32 to form a packed layer 36. The tube 54 of the watering flexible nozzle 50 protrudes from the filling layer 36. Examples of the filling method include an operation of spraying a granular material on artificial turf and pushing it between a plurality of piles 34 by a tool such as a brush or a sand spreader or by hand.

  Thus, the lawn ground 100 with a watering system by 1st embodiment of this invention can be constructed. The lawn ground 200 with a watering system according to the second embodiment of the present invention is also constructed in the same procedure as the above process except the process of installing the flexible nozzle 50 for watering and the natural lawn 70. Below, the construction process after arrange | positioning the water supply pipe 40 to the space | gap part of the plate-shaped rigid structure 20 is demonstrated.

  In the case of using natural lawn, the sheet body 80 described above may be laid on the plate-like rigid structure 20 before connecting the watering flexible nozzle 50 to the water supply pipe 40. In this case, the nonwoven fabric 80 is laid so that the socket 42 passes through the hole provided in the nonwoven fabric 80. Next, the water spray flexible nozzle 50 shown in FIGS. 4A and 4B is connected to the socket 42 provided in the water supply pipe 40.

  Next, the soil layer 72 is formed on the plate-like rigid structure 20. Thereafter, seeds are sprayed or filled in the soil layer 72 or seedlings are planted in the soil layer 72 to grow the natural turf 78. The roots 74 are stretched in the soil layer 72, and the turf leaves 76 from the surface of the soil layer 72. Is in an extended state. Specifically, fertilizer for cultivating natural turf, spraying eye sand, appropriate watering, trimming according to the growth of turf leaves 76, etc. are performed as appropriate. Spread enough lawn roots 74 into the soil layer 72. Thus, the lawn ground 200 with a watering system by 2nd embodiment of this invention can be constructed.

(Invention example)
The lawn ground 100 with a watering system shown in FIG. 3 was constructed according to the procedure described in FIGS. 7-1 and 7-2 (A) to (E).

  As a plate-like rigid structure, a structure as shown in FIGS. 2A and 2B (manufactured by Yoshihara Chemical Co., Ltd., moist drain / standard type, thickness: 25 mm) is shown in FIG. 2C. What provided the space | gap for inserting a water supply pipe | tube like this was used.

  As the artificial lawn, a 12,000 decitex, 130 μm and 310 μm thick mixed woven pile (monofilament pile) was used. As the granular material in the packed bed, the following mixed granular material was used. A powder (from Sri Lanka) obtained by pulverizing the mesocarp of coconut fruit was prepared. This powder was passed through a sieve having an opening of 9.5 mm, the maximum particle size was 6.0 mm, and the average particle size D50 was 1.0 mm. The average particle size D50 is measured using a plurality of sieves with different openings, the proportion of powder passing through the openings is measured, a graph of integrated mass% is created, and the integrated particle size is 50%. Asked. The openings of the sieves were 0.075 mm, 0.106 mm, 0.250 mm, 0.425 mm, 0.85 mm, 2.00 mm, 4.75 mm, and 9.5 mm. This measuring method is in accordance with JIS A 1204 “Soil Grain Size Testing Method”. The water content of this powder was 45.7% by mass as measured by the heat loss method. This powder and cinnabar sand were mixed in advance at a mixing mass ratio of 30:70 to form a mixed granule, and this mixed granule was filled between a plurality of piles. The thickness of the packed layer was 40 mm, and the height of the pile was 65 mm.

  As the water supply pipe, a vinyl pipe having a diameter of 20 mm was used on the outer periphery of the ground, and a vinyl hose having a diameter of 8 mm was disposed at an interval of 10 m in the width direction of the ground. The interval between the sockets was 10 m. As a water supply source, a water supply pump having a maximum water amount of 0.5 L / min and a maximum water pressure of 0.3 MPa was used.

  As the watering flexible nozzle, a watering flexible nozzle 50 (Technocore Co., Ltd., Rain Curtain (registered trademark)) as shown in FIGS. 4A and 4B was used. First, the outer diameter of the connecting portion is 6.0 mm, and the inner diameter is 3.0 mm. Next, in the plan view of FIG. 4A, the first plate-like portion 52A has a width in the direction perpendicular to the tube extending direction of 15.0 mm. The outer diameter of the tube is 2.0 mm and the inner diameter is 1.0 mm. Moreover, the length of the part which protruded from the filling layer among the tubes was 20 mm.

(Evaluation method and evaluation results)
Under an outside air temperature of 32 ° C., turbulent watering was performed on 100 lawn grounds with a watering system of the invention example. When the water volume is 0.5 L / min and the water pressure is 0.2 MPa, water drops spout from the spout while the tube vibrates randomly, and within a radius of 3 m from the installation position of the flexible nozzle for watering. I was able to scatter water droplets on the artificial turf. The temperature of the lawn ground surface before watering was 55 ° C., whereas the temperature of the lawn ground surface after watering was 47 ° C., and a large cooling effect could be obtained. Moreover, when the temperature at a position 1.2 m in height from the ground surface was measured on behalf of the perceived temperature on the ground, it was 36 ° C. before watering and 28 ° C. after watering. .

  The lawn ground with a watering system of the present invention is installed on, for example, an inner part of a track of an athletic stadium, a school yard, a garden, a playground, a rooftop, etc., and various ball games such as soccer, rugby, etc. It can be suitably used for various throwing competitions.

100,200 Lawn ground with watering system 10 Base 20 Plate-like rigid structure 22A Large monofilament 22B Small monofilament 24 Thick part 26 Cylindrical cavity 28A Upper covering layer 28B Lower covering layer 30 Artificial lawn 32 Base cloth 34 Pile (artificial Shiba)
36 Packing Layer 40 Water Supply Pipe 42 Socket 44 Water Supply Pump 50 Watering Flexible Nozzle 52 Base 52A First Plate Part 52B Second Plate Part 54 Tube 56 Connection Part 58A, B, C Channel 59 Spout 70 Natural Lawn 72 soil layer 74 root 76 turf leaf 78 natural turf 80 sheet

Claims (3)

The foundation,
A plate-like rigid structure installed on the substrate and having a gap portion;
Artificial lawn or natural lawn installed on the plate-like rigid structure;
Have
The artificial lawn has a base fabric, a plurality of piles planted on the base fabric, and a packed layer in which granular materials are filled between the plurality of piles on the base fabric,
The natural lawn has a soil layer and a natural lawn with roots extending in the soil layer and lawn leaves extending from the surface of the soil layer,
A water supply pipe is disposed in the gap portion of the plate-like rigid structure,
A flexible nozzle for watering is connected to the water supply pipe,
The flexible nozzle for watering has a base portion embedded in the filling layer or the soil layer, and a tube extending from the base portion and projecting from the filling layer or the soil layer and having a tip serving as a spout. ,
By supplying water from the water supply pipe to the flexible nozzle for watering, water drops spout from the jet outlet while the tube vibrates randomly, and water can be scattered to the artificial lawn or the natural lawn. A lawn ground with a watering system.   The grass ground with a watering system according to claim 1, wherein the base is a plate-like member. The grassy ground with a watering system according to claim 1 or 2, wherein the plate-like rigid structure is a drainage material made of a three-dimensional network in which strands made of synthetic resin extend in a random loop shape.