JPH08231954A - Material for athletic ground and its use - Google Patents

Abstract

PURPOSE: To construct an athletic ground giving reduced load on the players, resistant to the solidification of the surface and enabling healthy growth of lawn, etc. CONSTITUTION: This material 1 for athletic ground is composed of a hollow tube made of an elastic material and opened at both ends. The material 1 is embedded in the ground together with earth and sand 11 to form a bed soil layer 12 having a shock-absorbing action and a root mat layer 17 having lawn 16 is formed on the bed soil layer 12 to construct an athletic ground. The root mat layer may be planted with vegetables, horticultural plants, etc., in place of lawn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material that is buried in the ground of a ground together with soil and sand. This material is used for improving sports grounds, especially for sports.

[0002]

2. Description of the Related Art For example, a sports ground for playing soccer or tennis is preferably provided with appropriate flexibility in order to reduce an excessive burden on players. In addition, it is desirable that the sports ground does not lose the smoothness of the ground surface even if it receives a load from the athlete, and that the maintenance is easy. In particular, the grass ground (turf) is required to have proper porosity, water permeability, and water retention in order to prevent puddles due to rainfall and to ensure good growth of grass.

For this reason, conventionally, small pieces of polymer-synthesized hard fibers bonded in a square shape are mixed in the soil to increase the soil crampiness and, at the same time, to provide the ground surface with an appropriate degree of flexibility. It works. In addition, when creating a sports turf, sand or soil is filled into a mat-shaped one in which coconut fiber mats or synthetic resin materials are intertwined irregularly, grass is cultivated, and the mat is spread over the entire ground surface. The method has been adopted.
These conventional ones have both high uniaxial compressive strength indicating solidification of soil and high shear strength to withstand external pressure, and also have a shock absorber function and at the same time good growth of grass roots. Is also recognized as having the effect of increasing water permeability and breathability. In particular, when a polymer fibrous material is used, it can be applied to the sandy soil in a geotextile method, and the shearing force and compressive strength of the ground surface are enhanced, and it exhibits an excellent shock absorber effect. ing.

[0004]

SUMMARY OF THE INVENTION Materials such as synthetic fibers and palm fibers do not have air permeability, water permeability, and water retention. Therefore, conventionally, when these materials are combined to form a small piece or a mat, the structure is devised so that the small piece or the mat as a whole has breathability. For this reason, it is difficult for the conventional method to manufacture the small pieces and the mat itself, and it is difficult to reduce the cost.

In addition, the conventional method of laying a mat cultivated with turf on a ground not only takes time to manufacture the mat, but also the work of laying the mat is very difficult, which shortens the construction period and reduces the construction period. It is difficult to reduce costs.

[0006] Therefore, an object of the present invention is to provide a grounding material which can be suitably used for reducing the load on athletes, preventing solidification of the ground, and improving the ground in order to keep the growth of grass and the like healthy. .

[0007]

According to the present invention, a hollow tube, which is a material to be buried in the ground ground together with soil and / or sand, is made of an elastic material and has both open ends. A ground material composed of is provided.

[0008]

The gland material of the present invention (hereinafter abbreviated as "material") is made of an elastic polymer resin such as silicon rubber, or an elastic material such as natural rubber or synthetic rubber, and has a shape. Has a hollow tube shape with both end surfaces open. This material is highly elastic, and by mixing the material with soil and sand, it is possible to form an impact-relief floor soil layer with good flexibility that can reduce the burden on athletes. You can When forming the soil layer, it is sufficient to mix the material with soil or sand and use it as the ground soil. Therefore, since it is not necessary to pre-manufacture the mat or the small pieces in advance and work to spread the mat and the small pieces evenly on the ground, it is possible to construct the ground very easily.

The material of the present invention may be composed of a straight tube, but the straight tube has little entanglement between the tubes, is easily separated by an external pressure applied to the ground surface, and has a shear strength. I am worried that it will be inferior. Therefore, it is preferable that the shape of the tube used for the material is not a straight line, but the tube is bent at one or two or more points or is twisted. Further, the tube may be formed in a spiral shape. By doing so, many tubes are entangled with each other, and it becomes possible to form an impact relaxation layer with high shear strength. In addition, in order to improve the entanglement between the tubes, it is also effective to provide a large number of protrusions on the peripheral surface of the tubes.

Further, the material of the present invention exhibits good flexibility due to its tubular shape, and at the same time has the characteristic that the material itself has high air permeability, water permeability, and water retention because it is hollow. . Therefore, the gland formed by using the material of the present invention has good water permeability and air permeability, and is characterized in that optimum conditions can be created for growing roots of grass, plants such as vegetables and garden plants. In order to improve water permeability and air permeability, it is possible to form a large number of holes on the peripheral surface of the tube, for example.

Then, by mixing the material of the present invention with soil or sand and using it as the ground floor soil, a flexible floor soil layer having a shock absorbing effect is formed. Form a root mat layer with turf on top.
In this way, it is possible to provide a sports turf gland that is excellent in shock absorption, yet offers high shear strength, and that is optimal for growing grass. In this case, if a root mat layer for planting plants such as vegetables and horticultural plants is formed on the ground soil layer, it is possible to provide a ground that is suitable for the growth of these plants and that has good water permeability, air permeability, and water retention capacity. It will be possible.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a perspective view of a ground material 1 (hereinafter abbreviated as “material 1”) according to an embodiment. As will be described later, the material 1 is used by being buried in the ground of a sports ground, for example, together with soil and sand. The material 1 shown in the figure is composed of a hollow cylindrical tube 3 having both end surfaces 2 and 2 open, but it may be composed of a rectangular tube, a conical tube or the like. Also, tube 3
The cross-sectional shape of does not have to be constant, and a constriction or the like may be provided on the way. The tube 3 is made of an elastic polymer resin such as silicone rubber, or an elastic material such as natural rubber or synthetic rubber. The size of the tube 3 can be, for example, an outer diameter of 5 mm, an inner diameter of 3 mm, and a length of 10 cm, but can be freely changed to any other size. For example, the outer diameter is 10mm, 8mm, 6mm, 4m
m, length 20 cm, 15 cm, 10 cm, 5 cm, etc.,
It is possible to construct the tube 3 having an arbitrary size.

FIG. 2 shows a material 1 having a structure in which a bent portion 4 is provided on a tube 3. In FIG. 2 and FIGS. 3 to 6 described below, the tube 3 is hollow and the material thereof is an elastic material, which is the same as that described in FIG. The bent portion 4 is the tube 3
Is formed by, for example, heat molding in the manufacturing process of. In the illustrated example, the tube 3 is provided with the bent portions 4 at two places, but the places to be provided, the interval between the bent portions 4, the bending angle, etc. can be arbitrarily changed.

FIG. 3 shows a material 1 in which the tube 3 is provided with a twisted portion 5. Similar to the bent portion 4, the twisted portion 5 is also formed by, for example, heat molding in the manufacturing process of the tube 3. In the illustrated example, the tube 3 is twisted to impart a further bending angle. It should be noted that the formation location of the twisted portion 5, the interval, the bending angle imparted in the twisted portion 5, and the like can be arbitrarily changed.

FIG. 4 shows the material 1 in which the tube 3 is formed in a spiral shape. This spiral shape can also be imparted by, for example, heat molding. In the illustrated example, the whole tube 3 is formed in a spiral shape, but only a part thereof may be formed in a spiral shape. Also,
The size and interval of the spiral can be changed arbitrarily.

In FIG. 5, a large number of protrusions 6 are formed on the peripheral surface of the tube 3.
The material 1 of the structure provided with is shown. The protrusion 6 may be formed integrally with the tube 3, for example, but the protrusion 6 formed separately from the tube 3 may be attached to the peripheral surface of the tube 3 later. When attaching the protrusion 6 later,
The material of the protrusion 6 may be the same as or different from that of the tube 3, but the material is preferably an elastic material. In addition,
The arrangement, number, size, shape, etc. of the protrusions 6 can be arbitrarily changed.

FIG. 6 shows a material 1 having a structure in which a large number of holes 7 are formed in the peripheral surface of a tube 3. Since the hole 7 is provided, the internal space of the tube 3 and the atmosphere outside the peripheral surface of the tube 3 communicate with each other through the hole 7. The arrangement, number, size, shape, etc. of the holes 7 can be arbitrarily changed.

Now, the construction of the ground using the material 1 constructed as described above is performed as shown in FIG. A sports ground (sports turf) will be described as an example of the creation of a ground.

First, the material 1 and the soil and sand 11 (hereinafter referred to as "sand 1
1 ”) is mixed and supplied as ground soil on the ground base surface 10 to form a ground soil layer 12. A groove 13 for constructing a drainage facility is provided on the upper surface of the ground base surface 10.
Is provided. A water pipe 14 is arranged in the groove 13, and gravel 15 is filled around the pipe 13 while maintaining water permeability.

The material 1 and the earth and sand 11 can be easily mixed by using a mixer or the like. In this case, the material 1 may have various configurations as described above with reference to FIGS. It is free to mix and use the materials 1 having various configurations, and to mix and use the materials 1 having various sizes and shapes.

The floor soil layer 12 formed in this manner is used for the material 1
By utilizing the elasticity of, the soil layer 12 has a shock absorbing effect. Here, the supply amount of the material 1 and the earth and sand 11 and their mixing ratio are appropriately determined according to the properties and types of the material 1 and the earth and sand 11, the uniaxial compressive strength of the ground surface required for the sports ground, and the shear stress. . For example, if the mixing ratio of the material 1 is increased and the thickness of the soil layer 12 is increased, a softer sports ground can be obtained. On the contrary, increase the mixing ratio of the earth and sand 11 and the soil layer 12
If you reduce the thickness of the, it becomes a solid sports ground. In addition, if the relationship between the mixing ratio of the material 1 and the earth and sand 11 and the uniaxial compressive strength and the shear stress is defined in advance, it is convenient at the site of construction of the sports turf ground.

Next, a root mat layer 17 having turf 16 is formed on the soil layer 12 thus formed. The formation of the root mat layer 17 can be performed by supplying earth and sand onto the floor soil layer 12 to plant seeds and seedlings of the grass 16 and grow the grass 16. Alternatively, the root mat layer 17 made by growing the grass 16 in another place in advance may be spread over the soil layer 12.

In this way, the sports ground constructed as described above is characterized in that the material 1 is buried in the soil layer 12 of the ground, so that the shock absorbing ability is high and the athlete's physical maintenance ability is excellent. There is. Also, material 1
Since it is composed of elastic material, it is rich in resilience and can prevent soil compaction.

Further, by utilizing the bent portion 4, the twisted portion 5, the protrusion 6, the spiral shape, etc., which have been described above,
Since more entanglement between the materials 1 occurs in the process of mixing the material 1 and the earth and sand 11, it is possible to provide a strong turf gland having high shear resistance and less damage to the grass. Since the material 1 is a hollow tube shape, the sports ground created in this way has high air permeability and drainage, and also has an appropriate water retention capacity because it is easy for dirt, moisture, and air to enter the tube. Therefore, it is also suitable for growing grass. The air permeability and drainage can be further improved by forming holes 7 on the peripheral surface of the tube 3 as shown in FIG.

Although the method of using the material 1 has been described with respect to the construction of the turf gland, the material of the present invention can also be utilized as a ground for growing plants such as vegetables and garden plants other than turf. In this case as well, similar to the case described with reference to FIG. 7, the floor soil layer 12 in which the earth and sand 11 and the material 1 are mixed is first formed, but on the floor soil layer 12, the root mat layer 17 for the grass 16 is formed. Instead of, the root mat layer for planting plants such as vegetables and garden plants is provided. With such a configuration, as in the previous case, the material 1 buried in the floor soil layer 12 allows the growth of plants such as vegetables and horticultural plants that have high air permeability, high drainage, and appropriate water retention capacity. Will be able to provide a suitable ground. It should be noted that the use of the tube 3 having the holes 7 formed in the peripheral surface as shown in FIG. 6 makes it possible to further improve the air permeability and drainage property of the gland, similarly to the above.

[0026]

As described above, according to the present invention, it becomes possible to easily construct a gland having a large impact absorption, durability and recovery. In addition, the ground created in this way is easy to maintain, and is characterized by low cost and maintenance-free operation.

Further, since the gland formed by using the material of the present invention has a hollow tube shape, it has a high breathability and drainage property, and also has an appropriate water retention ability. It is also suitable for growing garden plants.

[Brief description of drawings]

[Figure 1] Illustration of materials made of straight tubes

FIG. 2 is an explanatory view of a material provided with a bent portion.

FIG. 3 is an explanatory view of a material provided with a twisted portion.

FIG. 4 is an explanatory view of materials formed in a spiral shape.

FIG. 5 is an explanatory diagram of a material having a large number of protrusions on its peripheral surface.

FIG. 6 is an explanatory view of a material having a large number of holes formed on its peripheral surface.

FIG. 7 is a sectional view of a sports ground (turf ground) constructed by using the material of the present invention.

[Explanation of symbols]

 1 Material for Gland 2 Both End Surfaces 3 Tube 4 Bent Part 5 Twisted Part 6 Protrusion 7 Hole 10 Ground Base Surface 11 Earth and Sand 12 Floor Soil Layer 13 Groove 14 Drain Pipe 15 Sand Gravel 16 Turf 17 Root Mat Layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroki Sawada 2-19-1, Tobita, Chofu City, Tokyo Kashima Construction Co., Ltd.

Claims (8)

[Claims] 1. A gland material which is a material to be buried together with soil and / or sand in the ground of the gland and which is made of an elastic material and is composed of a hollow tube having open both end surfaces. 2. The gland material according to claim 1, wherein the tube is bent at one or more places. 3. The gland material according to claim 1, wherein the tube is twisted at one or more points. 4. The gland material according to claim 1, wherein the tube is formed in a spiral shape. 5. The gland material according to claim 1, wherein a large number of protrusions are provided on the peripheral surface of the tube. 6. The gland material according to claim 1, wherein a large number of holes are formed in the peripheral surface of the tube. 7. The method of using the ground material according to claim 1, wherein a ground soil layer in which soil and / or sand and ground material are mixed is formed, and grass is provided on the floor soil layer. A method of forming a root mat layer. 8. The method of using the grounding material according to claim 1, wherein a ground soil layer in which soil and / or sand and grounding material are mixed is formed, and vegetables and horticulture are provided on the floor soil layer. A method for forming a root mat layer for planting a plant such as a plant.