JP2004036264A - Sports stadium using artificial lawn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance shock absorption and prevent the scattering of particulate matter, in a sports stadium using artificial lawn, where the artificial lawn, in which filling layers of the particulate matter are provided among the piles, is laid on a surface. <P>SOLUTION: The filling layers 5, which are composed or partially composed of the elastic particulate matter 51, are formed among the piles 4, so that the impact absorption can be enhanced; film yarn 41 of a width of 1-7 mm and a thickness of 60-130 μm is used for the pile 4; a tip of the film yarn 41 is protruded from a surface of the filling layer 5 by 10-40 mm, so that the film yarn 41 can be fallen onto the filling layer 5 so as to prevent the scattering of the particulate matter 51 with a relatively low specific gravity. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an artificial turf athletic stadium on which artificial turf is laid on a surface, which is optimal as an athletic stadium for baseball, soccer, hockey and the like.
[0002]
[Prior art]
BACKGROUND ART As an athletic stadium for baseball, soccer, hockey and the like, there is an athletic stadium made of artificial turf on which artificial turf is laid. Such artificial turf has a large number of piles that resemble natural turf leaves planted on the base material, but especially artificial turf laid on an athletic stadium reduces the impact on the player when falling. In order to reduce the injuries, many materials are filled between the piles and the impact is absorbed by the particles.
[0003]
[Problems to be solved by the invention]
Conventionally, artificial turf filled with such granules is filled with hard granules such as sand as the granules, filled with elastic granules such as rubber chips, or filled with the hard granules and the elastic granules as described above. There is something. However, those filled with hard particulates such as sand have a relatively large specific gravity because the hard particulates such as sand have a relatively large specific gravity. The hard granular material tends to harden by being settled down by stepping or rainfall or the like, so that when used for a long period of time, there is a problem that the shock absorbing property originally possessed gradually decreases.
[0004]
The elastic particles such as rubber chips or those filled with the elastic particles and the hard particles as described above increase the shock absorption due to the elasticity of the elastic particles such as rubber chips. Since the specific gravity is relatively small, the elastic granules do not settle and harden even after long-term use, so the impact absorption is hardly reduced, but the elastic granules are easily scattered and the ball falls. There was a problem that the portion was dented and the flatness was impaired.
[0005]
Further, recently, artificial turf has been proposed in which the shock absorbing property is further improved and the natural turf is provided with a feeling as if natural turf is vegetated. This artificial turf has a thicker layer of granular material to be filled by planting a relatively long pile with a length from the base material surface to the tip of 40 mm or more. The thicker the layer of the material, the more shock-absorbing properties of natural soil can be obtained, but the problem described above occurs remarkably, and those filled with hard particulate matter such as sand have a thicker layer. To this extent, the impact absorption due to settling and hardening is reduced, and the elastic particles such as rubber chips having a relatively small specific gravity are significantly scattered.
[0006]
Therefore, the present invention solves the above-mentioned problems in an artificial turf athletic stadium in which an artificial turf having a packed layer made of a granular material between piles is laid on the surface, and has excellent shock absorbing properties and a granular material. It is intended to provide an athletic stadium made of artificial turf that prevents the scattering of turf.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
In other words, the artificial turf athletic stadium according to the present invention comprises a base material and 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 implanted on the base material. An artificial turf comprising an elastic granular material formed by filling the space between the piles by projecting the tip of the pile by 10 to 40 mm, or a part of the elastic granular material, is laid on the surface. It is characterized by having.
[0008]
According to the present invention, since the filling layer formed between the piles is made of an elastic granular material or partially made of an elastic granular material, the elasticity of the elastic granular material enhances shock absorption, and in addition to this elasticity, Since the specific gravity of the elastic granular material is relatively small, the elastic granular material does not settle and harden even after long-term use, and almost no reduction in shock absorption occurs.
[0009]
Further, since the film yarn forming the pile has a width of 1 to 7 mm and is relatively wide, the wide surface becomes a resistance, and the movement of the elastic granular material forming the filling layer is suppressed. Therefore, scattering of the packed layer is prevented. The film yarn is originally easy to lay down, but a relatively thin film yarn having a thickness of 60 to 130 μm is used so that the film yarn can easily lay down, and the tip of the film yarn is protruded 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 down so as to cover the surface of the filling layer, and thus the scattering is also effectively prevented.
[0010]
The film yarn includes a split yarn formed with a number of splits and a slit yarn not formed with a split.In the present invention, either one may be used, but the split yarn is filled with an elastic granular material or the like. In this case, not only is it difficult to fill by being caught on the split, and it is difficult to obtain the flatness of the surface of the filling layer. In addition, when the split yarn is used in the present invention, the split is torn laterally to 1 to 7 mm as described above. It is necessary to have a width dimension of this. However, this side tearing operation is very troublesome and it requires skill to precisely adjust the width to 1 to 7 mm. When a fine beard is generated, it is deteriorated by ultraviolet rays or the like, which causes a problem in that the appearance becomes unsightly. 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 set to 1 to 7 mm is that if it is less than 1 mm, it is difficult 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, the natural turf has a different appearance from that of the natural turf, and the turf is slippery and easily injured. Preferably, the width of the natural turf is approximately 2 to 4 mm.
[0012]
Although the thickness of the film yarn is set to 60 to 130 μm, if it is less than 60 μm, it is excellent in lodging, but because it is too thin, it is liable to be deteriorated by ultraviolet rays. Further, in the present invention, the tip of the film yarn protrudes from the filling layer by 10 to 40 mm, but the reason for setting it to 10 to 40 mm is that if it is less than 10 mm, the area that covers the surface of the filling layer when it lays down is small. This is because the scattering cannot be effectively prevented, and if it exceeds 40 mm, the tip of the film yarn may be finely torn if the player repeatedly steps with spikes or the like, and the scattering prevention effect may be reduced.
[0013]
The length of the protrusion is preferably determined in consideration of the pitch (interval) at which the film yarns are planted. That is, there is no gap between the leading end of one bundle of film yarns and the other bundle of film yarns planted next to the other bundled film yarns in a state in which the film yarns planted adjacent to each other lie down. If the length is set so as to slightly polymerize as described above, the mutual film yarns will cover the surface of the filling layer without gaps, so that scattering is effectively prevented.
[0014]
In the present invention, the filling layer may be formed only of the elastic granular material, or a part thereof may be formed of the elastic granular material. Depending on the granular material, the impact may be absorbed too much and inconvenience may occur.Therefore, a packed layer is formed with the elastic granular material and the hard granular material, and the impact absorbing power is mixed with the elastic filler and the hard granular material. It is preferable to control the ratio.
[0015]
When the filling layer is formed of the elastic granular material and the hard granular material, a mixture of the elastic granular material and the hard granular material may be filled, or the elastic granular material and the hard granular material may be separately filled. And then mixed by brushing, or the elastic granular material and the hard granular material may be filled in layers, and the layer composed of the elastic granular material or the hard granular material, the elastic granular material and the hard granular material For example, the surface of the filling layer may be constituted by an elastic filling layer made of elastic granules, and the lower portion may be constituted by a mixed layer of elastic granules and hard granules. Is also good.
[0016]
According to the present invention, the scattering of the filling layer is effectively suppressed, so that the impact absorption is further enhanced, and the film yarn is formed from the film yarn so as to have a feeling that natural grass is vegetated on natural soil. In the formed pile, a relatively long pile is planted on the base material so that the length from the base surface to the tip is 40 to 80 mm, and the thickness of the filling layer can be increased.
[0017]
Also, in the present invention, a plurality of piles formed of monofilament yarns having a width of 0.5 to 2 mm and a thickness of 50 to 150 μm together with a pile formed of a film yarn are provided. If it is planted on the base material so that it protrudes more, the monofilament yarn has a lodging resistance, so that it combines with the film yarn to give an appearance similar to natural grass, This is preferable because a good rolling and landing feeling, easy kick in a soccer game, and the like are exhibited.
[0018]
When a monofilament yarn is used together with the film yarn, the film yarn and the monofilament yarn may have the same length, and may project from the surface of the packed layer with the same length. If the length of the film yarn is longer than or the same length when planting, in the planted state, if the tip of the film yarn is projected about 2-5 mm from the tip of the monofilament yarn, Since the ball or the like during play first hits the film yarn, the film yarn can be more easily laid down. In order to effectively prevent the scattering of the film yarn, the width of the film yarn is preferably larger than the width of the monofilament yarn.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of an artificial turf athletic field 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, reference numeral 1 denotes a base layer of an athletic stadium, 2 denotes an artificial turf laid directly on the surface of the base layer 1 or through a base material 11 such as a cushion material, and an artificial turf 2 is provided at a lower part. A base material 3 provided and laid on the base layer 1 or the base material 11, a number of piles 4 planted on the base material 3, and a filling layer 5 formed by filling between the piles 4. It is configured.
[0021]
The base layer 1 may be the ground itself, but is generally formed by casting water-permeable or non-water-permeable asphalt concrete on the ground. The artificial turf 2 is covered with a base material 11 made of a non-woven fabric for providing flatness and water permeability and making it easy to lay the artificial turf 2 thereon. The turf 2 is laid.
[0022]
The substrate 3 is not particularly limited as long as the pile 4 is planted, such as a woven fabric, a knitted fabric, or a non-woven fabric. The substrate 3 is not particularly limited, and an example is a plain woven fabric made of polypropylene.
[0023]
The pile 4 is one in which a plurality of film yarns 41 and monofilament yarns 42 are bundled and implanted in the base material 3. In this embodiment, the film yarns 41 and the monofilament yarns 42 have the same number. Four books, that is, four film yarns, and four monofilament yarns 42 are bundled together, and they are planted on the entire surface of the base material 3 at appropriate intervals as a unit. When 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 is planted, the planting interval is generally set so that the filling layer 5 can be easily filled. The piles are planted at a relatively wide pitch P of about 8 to 50 mm, and preferably have an interval of about 10 to 40 mm, which has an appropriate surface density of the pile 4 and has good appearance and is easy to fill.
[0024]
The film yarn 41 has a width W1 of 1 to 7 mm that effectively suppresses the scattering of the filling layer 5 and a thickness T1 of 60 to 130 μm, which is easy to lay down. Is a slit yarn formed by slitting to the above-mentioned width dimension, and is formed of an olefin-based synthetic resin such as polypropylene or polyethylene, or an appropriate synthetic resin material such as polyamide, polyvinylidene chloride, or polyester.
[0025]
The monofilament yarn 42 implanted as a bundle with the film yarn 41 has a width W2 of 0.5 to 2 mm and a thickness T2 of 50 to 150 μm, and has the same composition as the film yarn 41. It is formed by extruding one or many at the same time using a resin material. In this embodiment, the film yarn 41 is made of polyethylene, which is easy to lay down and has low sliding resistance at the time of sliding, polypropylene which easily lays down and has excellent heat resistance, or an olefin-based synthetic resin made of a mixture thereof, The monofilament yarn 42 is made of a polyamide which has excellent lodging resistance and easily recovers elastically upright even when stepped down.
[0026]
The film yarns 41 are bundled together so that the length L from the surface of the base material 3 to the tip is 40 to 80 mm, and the monofilament yarn 42 is shorter by 2 to 5 mm. And a pile 4 that is relatively long compared to a conventional pile that is generally 35 mm or less in length.
[0027]
A filling layer 5 is formed between the pile 4 composed of the film yarn 41 and the monofilament yarn 42 thus implanted, and the tip of the pile 4 projects from the surface of the formed filling layer 5. At the same time, the projecting length L1 of the leading end of the film yarn 41 is set to 10 to 40 mm, and the leading end of the monofilament yarn 42 projects about 2 to 5 mm lower than the leading end of the film yarn 41. The filling layer 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 to provide a suitable shock absorbing property. In the volume ratio, it is preferable that the elastic granular material 51 / the hard granular material 52 = 50/50 to 70/30.
[0028]
Natural or synthetic rubber chips, foamed or non-foamed synthetic resin granules, cork chips, crushed tires and the like as the elastic granules 51, sand such as river sand and mountain sand, silica sand, calcium carbonate, and the like as hard granules 52 Inorganic particulate matter such as glass, artificial sand and the like can be appropriately used.
[0029]
In the above embodiment, the film yarn 41 and the monofilament yarn 42 are bundled together and planted as one unit, but in the present invention, the film yarn 41 and the monofilament yarn 42 are bundled separately. These may be alternately or randomly implanted, or only the film yarn 41 may be implanted.
[0030]
【The invention's effect】
According to the present invention, since the filling layer formed between the piles is made of an elastic granular material or partially made of an elastic granular material, the shock absorption is enhanced, and the shock absorption is hardly reduced.
[0031]
Further, the film yarn forming the pile has a width of 1 to 7 mm and is relatively wide, so that scattering of the filling layer is prevented. Further, since the tip of the film yarn is projected from the filling layer by 10 to 40 mm, when the ball or the like falls on the film yarn, the wide surface easily falls down so as to cover the surface of the filling layer. Also, scattering is effectively prevented.
[Brief description of 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 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 turf 3 Base material 4 Pile 41 Film yarn 42 Monofilament yarn 5 Filling layer 51 Elastic granular material 52 Hard granular material

Claims (5)

A base material, formed from a film yarn having a width dimension of 1 to 7 mm and a thickness dimension of 60 to 130 μm, a number of piles implanted in the base material, and protruding the tip of the pile by 10 to 40 mm. An artificial turf athletic stadium characterized in that an artificial turf having a filling layer made of elastic granular material filled in between the piles or having a filling layer partially made of elastic granular material is laid on the surface. The artificial turf athletic stadium according to claim 1, wherein the filling layer of the artificial turf comprises an elastic granular material and a hard granular material. The artificial turf according to claim 1 or 2, wherein the pile formed from the film yarn is planted on the base material such that the length from the surface of the base material to the tip is 40 to 80 mm. Athletic stadium. In the artificial turf, a plurality of piles formed from monofilament yarns are planted on a base material together with a pile formed from film yarns, and the monofilament yarn has a width of 0.5 to 2 mm and a thickness of 50 mm. The artificial turf athletic field according to any one of claims 1 to 3, wherein the pitch is from 150 to 150 µm, and the tip of the pile protrudes from the filling layer. The artificial turf athletic stadium according to claim 4, wherein the tip of the film yarn projects 2 to 5 mm longer than the tip of the monofilament yarn from the surface of the filling layer.

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