JP4022441B2 - Artificial grass sports field - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an artificial turf athletic stadium having an artificial turf laid on the surface, which is optimal as an athletic stadium for baseball, soccer, hockey and the like.
[0002]
[Prior art]
As an athletic field for baseball, soccer, hockey, etc., there is an artificial turf athletic field with artificial turf laid on the surface. Such artificial turf is made by planting a large number of piles that resemble natural turf leaves on the base material. In particular, artificial turf laid in an athletic field is designed to reduce the impact on the player when falling. In order to reduce the injuries, many are used which are filled with particulates between the piles and absorb the impact by the particulates.
[0003]
[Problems to be solved by the invention]
As artificial turf filled with such granular materials, conventionally, those filled with hard granular materials such as sand as granular materials, those filled with elastic granular materials such as rubber chips, etc., filled with such hard granular materials and elastic granular materials as described above I have something to do. However, those filled with hard granular materials such as sand have a relatively large specific gravity, so that the granular materials are not scattered by rolling or sliding during play, but sand or the like. Since hard granular materials are easily stepped on and settling down due to rain or the like, they tend to harden. Therefore, when used for a long period of time, there is a problem that the initial shock absorption gradually decreases.
[0004]
In addition, those filled with elastic granular materials such as rubber chips and those filled with elastic granular materials and hard granular materials such as those described above have increased shock absorption due to the elasticity of the elastic particles such as rubber chips, and in addition to this elasticity. Since the specific gravity is relatively small, the elastic granular material will not sink and harden even after long-term use, so the impact absorption will hardly decrease, but the elastic granular material will be easily scattered and the ball will fall. There was a problem that the flatness was lost due to the depression.
[0005]
In addition, recently, artificial turf has been proposed that further enhances shock absorption and has a natural soil vegetation feel. This artificial turf is made by thickening the layer of granular material to be filled by planting a relatively long pile having a length from the substrate surface to the tip of 40 mm or more. The thicker the layer of material, the more shock absorption like natural soil can be obtained, but the above-mentioned problems occur remarkably, and those filled with hard granular materials such as sand are thickened. As a result, the impact absorbability is lowered due to the settling and solidification, and the scattering with the elastic particles such as rubber chips having a relatively small specific gravity is noticeable.
[0006]
Accordingly, the present invention provides an artificial turf athletic stadium having an artificial turf provided with a packed bed made of granular material between piles on the surface, which solves the above-described problems, is excellent in shock absorption, and is granular. The purpose is to provide an artificial turf athletics stadium that prevents scattering of water.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
That is, the artificial turf athletic stadium according to the present invention has a base material and a large number of piles that are formed from a film yarn having a width dimension of 1 to 7 mm and a thickness dimension of 60 to 130 μm, and planted on the base material. And an artificial turf comprising an elastic granular material formed by filling the pile between the piles with the tip of the pile protruding 10 to 40 mm, or a part of the artificial turf is made of elastic granular material, and is laid on the surface. An artificial turf athletic field, wherein the artificial turf has a pile formed from a monofilament yarn together with a pile formed from a film yarn, and the monofilament yarn has a width dimension. 0.5 to 2 mm and a thickness of 50 to 150 μm, and the tip of the pile protrudes from the packed bed, and the tip of the film yarn is from the tip of the monofilament yarn It protrudes 2-5 mm longer than the surface of the packed layer .
[0008]
According to the present invention, since the packed layer formed between the piles is made of elastic granular material or partly made of elastic granular material, the impact absorption is enhanced by the elasticity of the elastic granular material, and in addition to this elasticity. Since the elastic granular material has a relatively small specific gravity, the elastic granular material does not sink and harden even when used for a long period of time, and the shock absorption hardly decreases.
[0009]
Further, since the film yarn forming the pile has a width of 1 to 7 mm and is relatively wide, the wide surface serves as a resistance, and the movement of the elastic granular material or the like forming the filling layer is suppressed. Therefore, scattering of the packed bed is prevented. In addition, the film yarn is originally prone to fall down, but a relatively thin film yarn having a thickness of 60 to 130 μm is used to make it more likely to fall down, and the tip of the film yarn is projected from the filling layer by 10 to 40 mm. Therefore, when a game ball or the like falls on the film yarn, the wide surface easily falls over so as to cover the surface of the filling layer, and this also effectively prevents scattering.
[0010]
The film yarn includes a split yarn in which a large number of outputs are formed and a slit yarn in which a split is not formed. Either of these may be used in the present invention, but the split yarn is filled with an elastic granular material or the like. In this case, it is difficult to fill the surface by being caught by the split, and it is difficult to obtain the flatness of the surface of the packed layer. In addition, when the split yarn is used in the present invention, the split is laterally split to 1 to 7 mm as described above. However, this lateral splitting operation is very troublesome, and it takes skill to accurately adjust the width dimension to 1 to 7 mm. When something like a thin wrinkle occurs, there is a problem that it deteriorates due to ultraviolet rays etc. and becomes unsightly in appearance. Without said such problem with, it is preferable to use a slit yam was slit in such a width dimension of the initially without forming a split.
[0011]
The reason why the width of the film yarn is 1 to 7 mm is that if it is less than 1 mm, it is too thin to suppress the movement of the granular material, and if it exceeds 7 mm, the width of the natural turf is approximately 1 mm to 3 mm. Therefore, it looks different from natural turf, and it becomes slippery and easily injured, and preferably has a width of about 2 to 4 mm which is close to natural turf.
[0012]
The thickness of the film yarn is 60 to 130 [mu] m. If the thickness is less than 60 [mu] m, the film yarn is excellent, but the film yarn is too thin to easily deteriorate due to ultraviolet rays. Furthermore, in the present invention, the tip of the film yarn is protruded 10 to 40 mm from the filling layer, but the reason why it is 10 to 40 mm is that if it is less than 10 mm, the area that covers the surface of the filling layer when lying down becomes small. This is because scattering cannot be effectively prevented, and if it exceeds 40 mm, if the player is repeatedly stepped on with a spike or the like, the tip of the film yarn may be broken finely and the scattering prevention effect may be reduced.
[0013]
The protruding length is preferably determined in consideration of the pitch (interval) for planting the film yarn. In other words, there is no gap between the ends of one bundle of film yarns and the other bundle of film yarns planted next to each other, with the film yarns planted next to each other lying down together. If the length is somewhat polymerized as described above, the surface of the filling layer is covered with the mutual film yarns without any gaps, so that scattering is effectively prevented.
[0014]
In the present invention, the packed bed may be formed only from the elastic granular material, or a part thereof may be formed from the elastic granular material. Although it depends on the granular material, it may cause inconvenience due to excessive shock absorption, so a packed layer is formed with elastic granular material and hard granular material, and the impact absorbing power is mixed with elastic filler and hard granular material. The ratio is preferably controlled.
[0015]
When the packed bed is formed of elastic granular material and hard granular material, a mixture of elastic granular material and hard granular material may be filled, or the elastic granular material and hard granular material may be filled separately. Then, they may be mixed by brushing, or the elastic granule and the hard granule may be filled in layers, and the elastic granule or the layer made of the hard granule, the elastic granule and the hard granule For example, the surface of the packed layer is composed of an elastic packed layer made of elastic granular material, and the lower part is composed of a mixed layer of elastic granular material and hard granular material. Also good.
[0016]
According to the present invention, the scattering of the packed bed is effectively suppressed, so that the shock absorption is further enhanced, and the film yarn is made to have a feeling that natural grass is vegetated on natural soil. In the formed pile, a relatively long pile can be implanted in the substrate so that the length from the substrate surface to the tip is 40 to 80 mm, and the thickness of the filling layer can be increased.
[0017]
In the present invention, a pile formed from a monofilament yarn having a width of 0.5 to 2 mm and a thickness of 50 to 150 μm is combined with a pile formed from a film yarn. If the monofilament yarn is resistant to lodging if it is planted on the base material so that it protrudes more, it will have an appearance close to natural grass combined with the film yarn, and the appropriateness of the ball It is preferable because it exhibits a good rolling and landing feeling, ease of kicking in soccer competitions, and the like.
[0018]
When the monofilament yarn is used together with the film yarn, the film yarn and the monofilament yarn may have the same length and protrude from the surface of the packed bed with the same length, but the length of the film yarn may be the same as that of the monofilament yarn. When planting even if it is longer than or the same length, if the tip of the film yarn protrudes about 2 to 5 mm from the tip of the monofilament yarn, Since the ball etc. at the time of a play hits a film yarn first, it can make a film yarn fall more easily. In order to effectively prevent scattering by the film yarn, the width of the film yarn is preferably wider than the width of the monofilament yarn.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a sectional view showing an embodiment of an artificial turf athletic stadium according to the present invention, FIG. 2 is a perspective view of a film yarn used therein, and FIG. 3 is a perspective view of a monofilament yarn.
[0020]
In the drawings, 1 is a base layer of an athletic field, 2 is an artificial turf laid directly on the surface of the base layer 1 or appropriately through a base material 11 such as a cushioning material, and the artificial turf 2 From the base material 3 provided and laid on the base layer 1 or the base material 11, a large number of piles 4 planted on the base material 3, and the filling layer 5 filled between the piles 4 It is configured.
[0021]
Although the base layer 1 may be the ground itself, it is generally formed by placing water-permeable or non-permeable asphalt concrete on the ground. It is formed by placing a simple crushed stone, etc., covered with a base material 11 made of non-woven fabric for providing flatness and water permeability and making it easy to lay the artificial turf 2, and artificially covering it. Lawn 2 is laid.
[0022]
The base material 3 is not particularly limited as long as the pile 4 is planted, such as a woven fabric, a knitted fabric, and a non-woven fabric. Examples of the base material 3 include a plain woven fabric made of polypropylene.
[0023]
The pile 4 is planted on the base material 3 in a state where a plurality of film yarns 41 and monofilament yarns 42 are bundled. In this embodiment, the same number of film yarns 41 and monofilament yarns 42 are provided. Four books, that is, four film yarns and four monofilament yarns 42, are bundled together, and are planted on the entire surface of the base material 3 at an appropriate interval. When planting a relatively long film yarn 41 having a length L from the surface of the base material 3 to the tip of 40 to 80 mm, it is generally so that the filling layer 5 can be easily filled. Although it is planted at a relatively wide pitch P of about 8 to 50 mm, it is preferably an interval of about 10 to 40 mm, which has an appropriate surface density of the pile 4 and is good-looking and easy to fill.
[0024]
The film yarn 41 has a width dimension W1 of 1 to 7 mm which effectively suppresses the scattering of the packed layer 5 and a thickness dimension T1 of 60 to 130 μm which tends to fall down. The film having the above thickness is widened by extrusion molding or the like. Is a slit yarn formed by slitting to the width dimension described above, and is formed from an appropriate synthetic resin material such as olefin synthetic resin such as polypropylene or polyethylene, polyamide, polyvinylidene chloride, polyester or the like.
[0025]
The monofilament yarn 42 planted in a bundle with the film yarn 41 has a width dimension W2 of 0.5 to 2 mm and a thickness dimension T2 of 50 to 150 μm, and is synthesized in the same manner as the film yarn 41. It is formed by using resin material and extruding one or many at the same time. In this embodiment, the film yarn 41 is made of polyethylene, which is easy to fall over and has low slip resistance during sliding, polypropylene that is easy to fall down and excellent in heat resistance, or a mixture thereof. The monofilament yarn 42 is made of polyamide which has excellent lodging resistance and can be easily elastically restored upright even when it is stepped over.
[0026]
The film yarn 41 is bundled together so that the length L from the surface of the substrate 3 to the tip is 40 to 80 mm, and the monofilament yarn 42 is 2 to 5 mm shorter than that. The pile 4 is relatively long compared to a conventional pile having a length of 35 mm or less.
[0027]
A filling layer 5 is formed between the piles 4 constituted by the film yarn 41 and the monofilament yarn 42 thus planted, and the tip of the pile 4 protrudes from the surface of the formed filling layer 5. In addition, the protruding length L1 of the front end of the film yarn 41 is set to 10 to 40 mm, and the front end of the monofilament yarn 42 protrudes about 2 to 5 mm lower than the front end of the film yarn 41. The packed bed 5 is composed of a mixture of the elastic granular material 51 and the hard granular material 52, and the mixing ratio of the elastic granular material 51 and the hard granular material 52 is provided with an appropriate shock absorption property. In the volume ratio, it is preferable that the elastic granular material 51 / hard granular material 52 = 50/50 to 70/30.
[0028]
As the elastic granular material 51, natural or synthetic rubber chip, foamed or non-foamed synthetic resin granular material, cork chip, pulverized tire, etc., hard granular material 52 as sand such as river sand and mountain sand, quartz sand, calcium carbonate, Inorganic granular materials such as glass, artificial sand, and the like can be used as appropriate.
[0029]
In the above embodiment, the film yarn 41 and the monofilament yarn 42 are bundled together and planted as one unit. However, in the present invention, the film yarn 41 and the monofilament yarn 42 are bundled separately. These may be planted alternately or randomly, or only the film yarn 41 may be planted.
[0030]
【The invention's effect】
According to the present invention, since the filling layer formed between the piles is made of elastic granular material or partly made of elastic granular material, the shock absorption is increased and the impact absorption is hardly lowered.
[0031]
Moreover, since the film yarn forming the pile has a width of 1 to 7 mm and is relatively wide, scattering of the packed bed is prevented. Since the tip of the film yarn protrudes 10 to 40 mm from the filling layer, when the ball or the like falls on the film yarn, the wide surface easily falls over so as to cover the surface of the filling layer. Also, scattering is effectively prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an artificial turf athletic stadium according to the present invention.
FIG. 2 is a perspective view of a film yarn used in the present invention.
FIG. 3 is a perspective view of a monofilament yarn used in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base layer 2 Artificial grass 3 Base material 4 Pile 41 Film yarn 42 Monofilament yarn 5 Packing layer 51 Elastic granular material 52 Hard granular material

Claims (3)

A base material, a number of piles formed from a film yarn having a width dimension of 1 to 7 mm and a thickness dimension of 60 to 130 μm, and planted on the base material, and the tip of the pile projecting 10 to 40 mm An artificial turf comprising an elastic granule formed by filling between piles or partially filled with an elastic granule is an artificial turf athletic stadium laid on the surface , wherein the artificial turf The turf has a pile formed from a monofilament yarn together with a pile formed from a film yarn, and the monofilament yarn has a width of 0.5 to 2 mm and a thickness of 50 to 150 μm. And the tip of the pile protrudes from the filling layer, and the tip of the film yarn protrudes from the surface of the filling layer by 2 to 5 mm longer than the tip of the monofilament yarn. An artificial turf athletic stadium characterized by that. 2. The artificial turf athletic stadium according to claim 1, wherein the artificial turf filling layer is made of elastic granular material and hard granular material. The artificial turf product according to claim 1 or 2, wherein the pile formed from the film yarn is planted on the base material so that the length from the base material surface to the tip is 40 to 80 mm. Athletic field.

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