JP4556359B2 - Artificial turf structure and artificial turf stadium - Google Patents

Description

【００４９】
実施例と比較例とを比較検討した結果、以下のような知見を得た。
・実施例１〜５は比較例１と比較して、熱吸収率の低い弾性粒状物の効果により、表面温度が低い。
・比較例２は、実施例１〜５と同様に表面温度は低くはなるが、最上層の厚みが大きいため、飛散により平坦性が悪い。
・比較例３は、最上層の充填厚みが小さいために、温度上昇の抑制効果が小さい。
・比較例４は、最上層の真比重が小さく、飛散により平坦性が損なわれやすい。
・実施例４，５は、散水による保水効果が働き、実施例１，２と同じ仕様であるにもかかわらず、より温度上昇抑止効果が高い。
【００５０】
【発明の効果】
以上説明したように、本発明によれば、人工芝のパイル間に弾性充填材を含む充填材が充填された人工芝構造体において、上記充填材は、色および／または比重の異なる複数種類の粒状物を含み、これら粒状物により少なくとも２以上の層が形成され、その最上層には、下部側充填材よりも真比重が小さく、かつ、熱吸収率が低い特定の充填材が多く含まれていることにより、充填材の飛散を効果的に抑制するとともに、人工芝の表面温度の上昇も抑えることができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る人工芝の部分断面図。
【符号の説明】
１ 人工芝
２ 基布
３ パイル
４ 充填材
４１ 下層
４１１ 弾性粒状物
４１２ 硬質粒状物
４２ 上層（最上層）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an artificial turf structure in which a filler is filled between piles of artificial turf. More specifically, the artificial turf surface is effectively prevented from becoming hot due to direct sunlight, etc. The present invention relates to an artificial turf structure that can maintain a playability.
[0002]
[Prior art]
Artificial turf used for athletic facilities such as soccer and baseball has been developed with a filler filled with elastic granular material between its piles. Generally, a pulverized product of a waste rubber product such as a waste tire which is inexpensive and can be obtained in large quantities is used for this type of filler.
[0003]
Since the true specific gravity of this elastic granular material is close to 1.0, it is likely to be scattered by the player's protrusion, etc., so the pile length (turf height) of the artificial turf is 10 It protrudes by 30 mm or more to make it difficult for the filler to scatter.
[0004]
[Problems to be solved by the invention]
However, since the filler made of pulverized waste rubber products such as the above-mentioned waste tires is generally colored black, it easily absorbs heat from light. Therefore, in summer, the surface temperature of the artificial turf is increased by absorbing the heat of sunlight that shines on, so that the physical burden on the player is great and the comfort is easily impaired.
[0005]
Therefore, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-260410, an artificial turf in which a water flow groove is arranged in the lower layer of the artificial turf so as to adjust and manage the water amount of the artificial turf lower layer is disclosed. Not only does the construction of the equipment become a big thing, it is difficult to keep the artificial turf surface homogeneous.
[0006]
On the other hand, some of the fillers contain a water-absorbing material such as a water-absorbing polymer to improve the water retention of artificial turf, but this kind of water-absorbing material is always necessary easily and inexpensively. The quantity is not always available.
[0007]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a comfortable playability throughout the year by effectively suppressing the temperature increase of the artificial turf even at a low cost. It is to provide an artificial turf structure.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides an artificial turf structure in which a filler including an elastic filler is filled between piles of artificial turf, and the filler includes a plurality of types having different colors and / or specific gravity. including particulates, at least 2 or more layers formed by these granules, the lower side filler comprises a resilient granules was granules of waste rubber products such as tires, the uppermost layer, the lower It is characterized in that it contains a lot of colored rubber chips other than black having a true specific gravity smaller than that of the side filler and a low heat absorption rate.
[0009]
According to this, it is possible to effectively suppress the temperature increase of the artificial turf by including a lot of colored rubber chips other than black, which has a low heat absorption rate, in the uppermost filler that is directly affected by direct sunlight. By making the true specific gravity smaller than the lower side, it is possible to prevent the filler from entering the lower side, and no troublesome maintenance is required, and a stable artificial grass can be obtained throughout the year.
[0010]
Your name, the "colored" in the present invention, or coated with a pigment to filler, state and artificially colored Dari kneaded, inherent with the filling material in a natural state as rice husk and wood chips Including color.
[0011]
As a more preferred embodiment, it is preferable that the true specific gravity of the rubber chip contained in the uppermost layer is 0.3 to 1.0, and the layer thickness of the uppermost layer is 5 to 20 mm. According to this, when the true specific gravity exceeds 1.0, the filler tends to sink into the lower layer, and the heat absorption suppressing effect is lowered. When the true specific gravity is less than 0.3, scattering is severe and the lower layer is easily exposed on the surface. In any case, it is difficult to obtain a heat absorption suppressing effect.
[0012]
On the other hand, when the layer thickness exceeds 20 mm, the overall specific gravity is reduced, the filler is easily moved by kicking or the like, and the flatness is easily impaired. On the contrary, if the layer thickness is less than 5 mm, the covering property for the lower layer is deteriorated, and the lower layer is exposed by use over time, and the heat absorption suppressing effect is lowered.
[0013]
According to the present invention, the lower-side filler comprises a resilient granules waste rubber products such as tires and the granules above is Ru charge Hamazai that contained in the uppermost layer, is deposited color other than black By using rubber chips, it is possible to use recycled products that are inexpensive and available in large quantities.
[0014]
In addition to this, the filler filled in the uppermost layer may include woody particulates such as rice husks, sawdust, crushed wood chips, and crushed corks. According to this, moisture absorption It has good characteristics, can effectively suppress the temperature rise, and it is safe to enter the player's mouth by using natural materials.
[0015]
The present invention also includes an artificial turf stadium constructed by the artificial turf structure described above. That is, the present invention is applicable to various artificial turf sports facilities such as tennis courts, soccer stadiums, baseball stadiums, and athletic stadiums.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, an artificial turf structure 1 according to the present invention has an artificial turf 1 with a pile 3 tufted at a predetermined interval on a base cloth 2 and a pile 3 on the back surface that is prevented from being detached. It is constructed by laying on the pile 3 and filling the filler 3 between the piles 3.
[0017]
In this embodiment, the base fabric 2 is made of, for example, a base fabric yarn made of resin such as polypropylene (PP), polyethylene (PE), nylon (NY), polyethylene terephthalate (PET), uniaxially stretched or short fibers are brought close together. It may be made into a cloth by weaving what is made of fiber, and one or two of them are used in layers, but the two-layers are more stable in steps and are less likely to wrinkle due to external force after laying. Therefore, it is more preferable.
[0018]
When two base fabrics 2 are stacked, by using a base fabric obtained by punching synthetic fiber in the form of cotton, dimensional stability and wrinkle prevention properties are improved.
[0019]
The pile 3 may be a split yarn or a monofilament yarn made of a synthetic resin such as polypropylene (PP), polyethylene (PE), nylon (NY), polyethylene terephthalate (PET), and preferably has a thickness of 5000 to 10000 dtex. It is. The thickness when the monofilament yarn is used is the total thickness of a plurality of single yarns.
[0020]
In this embodiment, the pile 3 uses a split yarn made of polypropylene. Further, as the pile 3 retaining prevention process, a method of applying SBR latex rubber, urethane resin or the like to the back surface of the base fabric 2 is used.
[0021]
The artificial turf 1 of the present invention is a so-called long pile artificial turf having a pile length H of 30 to 60 mm from the base fabric 2 to the pile tip, and the filler 4 is placed between the piles 3 from the surface of the filler 4 to the pile tip. The pile protrusion height h2 is filled up to 10 mm or more. According to this, scattering of the filler 4 is effectively prevented.
[0022]
The filler 4 has a two-layer structure in which the lower layer 41 and the upper layer 42 are filled to a predetermined thickness. In this embodiment, the upper layer 42 is a substantially uppermost layer, and the thickness of each filler layer is appropriately selected according to the specifications so long as the above-described pile protrusion height h2 protrudes 10 mm or more. Good.
[0023]
In this embodiment, the lower layer 41 is made of a mixture of elastic granular material 411 and hard granular material 412, and is filled with a predetermined thickness so as to obtain the elasticity required by the artificial turf. The mixing ratio of the elastic granular material 411 and the hard granular material 412 is arbitrarily selected according to the specification.
[0024]
As the elastic granular material 411, a recycled product such as a waste rubber product is preferably used. Among the recycled products of the waste rubber product, a waste rubber product such as a window frame is more preferable because it has less smell. The hard granular material 412 may be various ceramics, stones, and the like, and is not particularly limited, but is preferably cinnabar sand.
[0025]
The elastic granular material 411 preferably contains 80% or more particles having a particle diameter of 0.3 to 3.0 mm. That is, when the particle size exceeds 3.0 mm, the fit between the piles of the artificial turf is poor, and when the particle size is less than 0.3 mm, there is a risk of scattering or outflow due to wind or rain.
[0026]
The hard granular material 412 preferably has a particle size of 0.1 to 1.2 mm occupies 80% or more. That is, when the particle size is less than 0.1 mm or exceeds 1.2 mm, it becomes easy to separate from the elastic granular material 411, and the separated hard granular material 412 moves to the lower part of the artificial turf, and the elasticity of the artificial turf is lowered. To do.
[0027]
In this embodiment, the lower layer 41 is composed of a mixed layer of elastic granular material 411 and hard granular material 412, but in addition to this, a layer composed of a single body of elastic granular material 411 and hard granular material 412 is laminated. A plurality of layers may be used. In this case, the layer thickness and the number of layers of each layer are appropriately selected according to the specifications of the artificial turf.
[0028]
Next, the uppermost layer (upper layer) 42 will be described. The basic structure of the filler 421 filled in the uppermost layer 42 may be an elastic granular material having a true specific gravity smaller than that of the lower layer 41 and a low heat absorption rate. As a more specific aspect, it is preferable that the true specific gravity is 0.3 to 1.0 and the layer thickness h1 is 5 to 20 mm.
[0029]
That is, when the true specific gravity exceeds 1.0, the filler 421 sinks into the lower layer side, and the heat absorption suppressing effect is lowered. On the other hand, if it is less than 0.3, the scattering is intense and the lower layer is easily exposed on the surface, and as a result, the effect of suppressing heat absorption cannot be expected.
[0030]
Furthermore, when the layer thickness h1 is less than 5 mm, the covering property with respect to the lower layer 41 is deteriorated, and the lower layer is exposed by use over time, and the heat absorption suppressing effect is lowered. On the other hand, when the layer thickness h1 exceeds 20 mm, the overall specific gravity is reduced, the filler 421 is easily moved by kicking or the like, and the flatness is easily impaired.
[0031]
The specific material of the filler 421 is not particularly limited as long as it satisfies the above conditions, but examples thereof include the following Examples 1 to 3.
[Example 1] As a method of coloring a pulverized product of colored foamed rubber, a method of coloring by coloring a raw material directly into a raw material, or a method of coloring the surface when black rubber such as a waste rubber product is used However, the former is more preferable than the latter because there is no possibility of peeling and discoloration and the effect can be maintained.
[Example 2] As a method for coloring a pulverized product of a synthetic resin foam such as urethane and polyethylene, the same method as in Example 1 can be used. The foaming layer absorbs moisture by foaming so as to form open cells, and an effect of suppressing temperature rise is also exhibited.
[Example 3] Natural materials such as wood chips, cork pulverized products, sawdust, rice husks, etc. are originally porous structures, so they have water absorption and are effective in suppressing temperature rise due to their water retention effect. Because it is a natural material, it is inconspicuous even if it is scattered, and it is harmless even if it enters the player's mouth.
[0032]
Even if it is except Example 1-Example 3 mentioned above, if it is an elastic granular material with a true specific gravity smaller than the said lower layer 41 and a low heat absorption rate, it can select arbitrarily and can be used. Moreover, in this embodiment, although the uppermost layer 42 is comprised from the simple substance of the elastic granular material, the mixture mixed with the granular material other than this may be sufficient.
[0033]
In this embodiment, the filler 4 has a two-layer structure of a lower layer 41 and an upper layer 42, but an intermediate layer may be provided between them, as long as it has at least the lower layer 41 and the upper layer (uppermost layer) 42. For example, other modifications are also included in the present invention.
[0034]
The artificial turf structure of the present invention can be applied to various artificial turf grounds such as a baseball stadium, a soccer field, and a tennis court. Moreover, even if it is other artificial turf facilities, as long as the artificial turf property obtained by this invention is applicable, you may select and construct.
[0035]
【Example】
Next, more specific examples of the present invention will be described together with comparative examples. First, an artificial turf with a filler was produced by the following method.
[0036]
(Production of artificial grass with filler)
(1): Artificial turf preparation Polypropylene split yarn 7800dtex (width 12mm) tufted to a base fabric made of polypropylene plain woven fabric with a pile length of 50mm, and then SBR latex rubber is uniformly applied from the back to prevent slipping To produce artificial turf.
(2): Filling of filler The artificial turf prepared in (1) was laid on the base, and the lower layer filler was filled to a thickness of 20 mm. The filler used was a pulverized product of waste tires with a particle size of 0.2 to 3.0 mm accounting for 90% or more of the total. Furthermore, the upper layer filler was filled on the lower layer filler under the conditions of Examples 1 to 5 and Comparative Examples 1 to 4.
{Circle around (3)} Sprinkling For some examples and some comparative examples, the following various evaluations were performed after watering was carried out to such an extent that water did not float on the surface.
[0037]
(Observation of surface temperature)
First, the artificial turf of Examples 1 to 5 and Comparative Examples 1 to 4 was left under the hot sun from 10:00 to 16:00, and the surface temperature was measured.
(Observation of movement of granular materials)
Next, after laying the artificial turf of Examples 1 to 5 and Comparative Examples 1 to 4, the artificial turf was left as it was for one week, and then the state of holding the uppermost granular material was observed. Each evaluation result is shown below.
[0038]
Example 1
[Artificial grass specifications]
Granule material: foam rubber, color: beige (colored), particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.8, thickness: 10 mm, watering: none [Evaluation Result] Maximum surface temperature : 65 ° C, granular material scattering state: no significant scattering [0039]
Example 2
[Artificial grass specifications]
Granule material: Polyethylene foam, color: white, particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.3, thickness: 10 mm, watering: none [Evaluation result] Maximum surface temperature: 63 ℃, granular material scattering state: no significant scattering [0040]
Example 3
[Artificial grass specifications]
Granule material: sawdust, color: light brown, particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.4, thickness: 10 mm, watering: none [evaluation result] Maximum surface temperature: 69 ° C, Particulate matter scattering state: no significant scattering [0041]
Example 4
[Artificial grass specifications]
Granule material: foamed rubber, color: beige (colored), particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.8, thickness: 10 mm, watering: [Evaluation result] Maximum surface temperature : 58 ° C, particulate scattering state: no significant scattering [0042]
Example 5
[Artificial grass specifications]
Granule material: sawdust, color: light brown, particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.4, thickness: 10 mm, watering: [evaluation result] Maximum surface temperature: 55 ° C, Particulate matter scattering state: no significant scattering [0043]
<Comparative example 1>
[Artificial grass specifications]
Granule material: Tire pulverized product, color: black, particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 1.1, thickness: 10 mm, water spray: none [Evaluation result] Maximum surface temperature: 72 ℃, granular material scattering state: no significant scattering [0044]
<Comparative example 2>
[Artificial grass specifications]
Granule material: foam rubber, color: beige (colored), particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.8, thickness: 25 mm, watering: none [Evaluation Result] Maximum surface temperature : 65 ° C., granular material scattering state: poor flatness due to scattering [0045]
<Comparative Example 3>
[Artificial grass specifications]
Granule material: foamed rubber, color: beige (colored), particle size: 0.2-3.0 mm is 90% or more, true specific gravity: 0.8, thickness: 3 mm, watering: none [Evaluation result] Maximum surface temperature : 70 ° C, granular material scattering state: lower layer exposure due to scattering
<Comparative example 4>
[Artificial grass specifications]
Granule material: polyethylene foam, color: white, particle size: 0.2 to 3.0 mm is 90% or more, true specific gravity: 0.2, thickness: 10 mm, watering: none [Evaluation result] Maximum surface temperature: 63 ℃, granular material scattering state: poor flatness due to scattering [0047]
For reference, a summary of the results of Examples 1-5 and Comparative Examples 1-4 is shown in Table 1.
[0048]
[Table 1]

[0049]
As a result of comparing and examining Examples and Comparative Examples, the following findings were obtained.
-Compared with the comparative example 1, Examples 1-5 have low surface temperature by the effect of an elastic granular material with a low heat absorption rate.
In Comparative Example 2, the surface temperature is low as in Examples 1 to 5, but the flatness is poor due to scattering because the thickness of the uppermost layer is large.
-Since the filling thickness of the uppermost layer is small, the comparative example 3 has the small effect of suppressing a temperature rise.
In Comparative Example 4, the true specific gravity of the uppermost layer is small, and the flatness is easily impaired by scattering.
In Examples 4 and 5, the water retention effect by watering works, and the temperature rise inhibiting effect is higher despite the same specifications as in Examples 1 and 2.
[0050]
【The invention's effect】
As described above, according to the present invention, in the artificial turf structure in which the filler including the elastic filler is filled between the piles of the artificial turf, the filler has a plurality of types having different colors and / or specific gravity. These granular materials form at least two or more layers, and the uppermost layer contains many specific fillers having a lower true specific gravity and a lower heat absorption rate than the lower side fillers. As a result, scattering of the filler can be effectively suppressed, and an increase in the surface temperature of the artificial turf can be suppressed.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of an artificial turf according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Artificial grass 2 Base cloth 3 Pile 4 Filler 41 Lower layer 411 Elastic granular material 412 Hard granular material 42 Upper layer (uppermost layer)

Claims (3)

In an artificial turf structure filled with a filler including an elastic filler between piles of artificial turf,
The filler includes a plurality of kinds of granular materials having different colors and / or specific gravity, and at least two or more layers are formed by the granular materials, and the lower-side filler is formed of granular waste rubber products such as waste tires. includes a resilient granules was, the uppermost layer, characterized in that the true specific gravity than the lower side filler is small and rubber chips the heat absorption rate is colored other than low black is contained in a large amount Artificial grass structure. 2. The artificial turf structure according to claim 1, wherein a true specific gravity of the rubber chip included in the uppermost layer is 0.3 to 1.0, and a layer thickness of the uppermost layer is 5 to 20 mm. An artificial turf stadium constructed by the artificial turf structure according to claim 1 or 2 .

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