JP7155982B2 - Artificial lawn laying structure for javelin throwing - Google Patents

Artificial lawn laying structure for javelin throwing Download PDF

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JP7155982B2
JP7155982B2 JP2018232737A JP2018232737A JP7155982B2 JP 7155982 B2 JP7155982 B2 JP 7155982B2 JP 2018232737 A JP2018232737 A JP 2018232737A JP 2018232737 A JP2018232737 A JP 2018232737A JP 7155982 B2 JP7155982 B2 JP 7155982B2
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artificial lawn
javelin
throwing
laying
lower layer
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JP2020094398A (en
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邦彦 関谷
俊哉 石黒
保彦 中西
剛士 坂井
悟士 多田
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TOA ROAD CORPORATION
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Description

本発明は、投てき競技場に適用される人工芝生敷設構造に係り、特にやり（槍）投げに好適な人工芝生敷設構造に関する。 TECHNICAL FIELD The present invention relates to an artificial lawn-laying structure applied to a throwing arena, and more particularly to an artificial lawn-laying structure suitable for javelin throwing.

投てき競技場のフィールドに適用される人工芝生敷設構造が特許文献１，２に記載されている。 Patent Documents 1 and 2 describe an artificial lawn laying structure applied to the field of a throwing stadium.

特許文献１の人工芝生敷設構造は、基礎層上に人工芝生を敷設し、砂等を芝葉間に充填したものである。特許文献１の人工芝生敷設構造は、ハンマー、円盤又は砲丸の落下痕跡を確実に形成するためのものであり、やりが刺さり易くなるようにするためのものではない。 The artificial lawn laying structure of Patent Document 1 lays an artificial lawn on a base layer and fills sand or the like between the grass leaves. The artificial lawn-laying structure of Patent Document 1 is intended to reliably form a drop trace of a hammer, disc or cannonball, and is not intended to make it easier for a spear to stick.

特許文献２の人工芝生敷設構造は、人工芝生を２層に敷設し、下層の人工芝生の芝葉には芝葉の上端に至るまで珪砂を充填し、上層の人工芝生には芝葉の途中まで珪砂を充填したものである。特許文献２の人工芝生敷設構造は、やりが上層を貫通しても下層で止まるようにし、やりの損傷を防止することを企図したものである。 In the artificial lawn laying structure of Patent Document 2, the artificial lawn is laid in two layers, the lower artificial lawn is filled with silica sand up to the top of the lawn leaf, and the upper artificial lawn is filled with silica sand in the middle of the lawn. It is filled with silica sand up to The artificial lawn laying structure of Patent Document 2 is intended to prevent damage to the spear by stopping it at the lower layer even if it penetrates the upper layer.

特開２０１５－１０８２４７号公報JP 2015-108247 A 特開２０１５－１４８１４６公報Japanese Patent Application Laid-Open No. 2015-148146

特許文献２の人工芝生敷設構造では、下層が人工芝生と、該人工芝生の芝葉間に、芝葉の上端に至るまで充填された珪砂とで構成されている。一般に、人工芝生の芝葉の上端高さは、芝葉毎にバラツキがある。そのため、芝葉上端まで珪砂を充填した下層にあっては、その上面に不陸が生じ易い。不陸を抑制するためには芝葉の長さを均一に揃えるようにすることが必要であるが、そのような人工芝生を製造することは容易ではない。 In the artificial lawn laying structure of Patent Document 2, the lower layer is composed of the artificial lawn and silica sand filled between the grass leaves of the artificial lawn up to the upper ends of the grass leaves. In general, the height of the upper edge of the lawn leaves of an artificial lawn varies from lawn to lawn. Therefore, in the lower layer filled with silica sand up to the upper end of the grass leaf, unevenness is likely to occur on the upper surface. In order to suppress unevenness, it is necessary to make the length of grass leaves uniform, but it is not easy to manufacture such an artificial lawn.

また、人工芝生を２層に敷設するところから、資材コストが高い。 Also, since the artificial lawn is laid in two layers, the material cost is high.

本発明は、やりが刺さり易く、しかも施工が容易で低コストである人工芝生敷設構造を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide an artificial lawn laying structure which is easy to stick a spear into, is easy to construct, and is low in cost.

本発明のやり投てき用人工芝生敷設構造は、基礎と、該基礎上に設けられた、粒状物を含む下層と、該下層の上に設けられた、粒状物を含む人工芝生とを有する人工芝生敷設構造において、該下層は、上面が開放し、底面が閉鎖された穴よりなるポケット穴を有したハニカム構造体を備え、該ポケット穴に前記粒状物がハニカム構造体の上面と面一状に充填されていることを特徴とする。 An artificial lawn laying structure for javelin throwing according to the present invention is an artificial lawn having a foundation, a lower layer containing particulates provided on the foundation, and an artificial lawn containing particulates provided on the lower layer. In the laying structure, the lower layer includes a honeycomb structure having pocket holes each having an open top surface and a closed bottom surface, and the granules are placed flush with the top surface of the honeycomb structure in the pocket holes. It is characterized by being filled.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ポケット穴に充填された前記粒状物中の弾性粒状物の割合が５０体積％以下である。 In one aspect of the artificial lawn laying structure for javelin throwing of the present invention, the percentage of elastic particles in the particles filled in the pocket holes is 50% by volume or less.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ポケット穴に充填された前記粒状物は、硬質粒状物よりなるか、又は硬質粒状物を主体とする。 In one aspect of the artificial lawn laying structure for javelin throwing according to the present invention, the particulates filled in the pocket holes are composed of hard particulates or mainly composed of hard particulates.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ポケット穴に充填された粒状物の充填層は、山中式土壌硬度計による平均表面硬さが０．５ｋｇ／ｃｍ２以上３０ｋｇ／ｃｍ２以下、かつ１０回計測したときの該表面硬さ測定値の標準偏差が１０ｋｇ／ｃｍ２以下である。 In one aspect of the spear-throwing artificial lawn laying structure of the present invention, the layer of granular material filled in the pocket hole has an average surface hardness of 0.5 kg/cm 2 or more and 30 kg/cm as measured by a Yamanaka soil hardness tester. 2 or less, and the standard deviation of the surface hardness measurement value when measured 10 times is 10 kg/cm 2 or less.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ポケット穴に充填された粒状物の粒径が５ｍｍ以下である。 In one aspect of the artificial lawn laying structure for javelin throwing of the present invention, the particle size of the particulate matter filled in the pocket holes is 5 mm or less.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ハニカム構造体の前記ポケット穴の開口面積が２，０００～１０，０００ｍｍ２である。 In one aspect of the artificial lawn laying structure for javelin throwing of the present invention, the opening area of the pocket holes in the honeycomb structure is 2,000 to 10,000 mm 2 .

本発明のやり投てき用人工芝生敷設構造の一態様では、前記ハニカム構造体は、ハニカム状格子壁体と、該格子壁体と該格子壁体の底面に固着された底部シートを有する、又は該ハニカム状格子壁体と一体形成された底面を有する。 In one aspect of the artificial lawn laying structure for javelin throwing of the present invention, the honeycomb structure has a honeycomb lattice wall and a bottom sheet fixed to the lattice wall and the bottom surface of the lattice wall. It has a bottom surface integrally formed with the honeycomb lattice wall.

本発明のやり投てき用人工芝生敷設構造の一態様では、ハニカム構造体は合成樹脂繊維の織布又は不織布よりなる。 In one aspect of the artificial lawn laying structure for javelin throwing of the present invention, the honeycomb structure is made of woven or non-woven fabric of synthetic resin fibers.

本発明のやり投てき用人工芝生敷設構造の一態様では、前記下層の粒状物の厚さＨ１と、前記人工芝生の前記粒状物の厚さＨ３との合計Ｈ１＋Ｈ３が６０～１６０ｍｍである。 In one aspect of the artificial turf laying structure for javelin throwing of the present invention, the total H 1 +H 3 of the thickness H 1 of the lower layer granules and the thickness H 3 of the granules of the artificial lawn is 60 to 160 mm. is.

本発明のやり投てき用人工芝生敷設構造は、やりが刺さり易く、また下層の施工が容易であり、その資材コストも安価である。 The spear-throwing artificial lawn-laying structure of the present invention is easy to stick the spear into, and the construction of the lower layer is easy, and the material cost is low.

実施の形態に係る人工芝生敷設構造の断面図である。1 is a cross-sectional view of an artificial lawn laying structure according to an embodiment; FIG. ハニカム構造体の一部の平面図である。FIG. 4 is a plan view of part of the honeycomb structure; ハニカム構造体の一部の斜視図である。1 is a perspective view of part of a honeycomb structure; FIG. 図３のIV－IV線断面図である。FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3; 別のハニカム構造体の一部の斜視図である。Fig. 10 is a perspective view of part of another honeycomb structure; 図５のIV－IV線断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV of FIG. 5;

以下、図面を参照して実施の形態について説明する。図１は、実施の形態に係る人工芝生敷設構造の縦断面図である。 Embodiments will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an artificial lawn laying structure according to an embodiment.

基礎１の上に下層２が設けられ、該下層２の上に上層３（人工芝生層）が設けられている。基礎１は、地盤（図示略）上に設けられたのであり、砕石、砂利及び砂等の１又は２以上を所定厚さ１００ｍｍ以上に敷き詰めることにより形成される。 A lower layer 2 is provided on a foundation 1 and an upper layer 3 (artificial lawn layer) is provided on the lower layer 2 . The foundation 1 is provided on the ground (not shown), and is formed by spreading one or more of crushed stone, gravel, sand, etc. to a predetermined thickness of 100 mm or more.

下層２は、図２～６に示すハニカム構造体２０のポケット穴２５に粒状物Ｓを充填したものである。ハニカム構造体２０は、ハニカム状格子壁体２１と、該格子壁体２１の底面に接着剤等で固着された底部シート２２とを有する、又はハニカム状格子壁体２１と一体形成された底面を有する。 The lower layer 2 is obtained by filling the pocket holes 25 of the honeycomb structure 20 shown in FIGS. The honeycomb structure 20 has a honeycomb lattice wall 21 and a bottom sheet 22 fixed to the bottom surface of the lattice wall 21 with an adhesive or the like, or has a bottom surface integrally formed with the honeycomb lattice wall 21. have.

格子壁体２１は、ポリプロピレン、ポリエチレン、ナイロン、ポリエチレンテレフタレート等の合成樹脂繊維の織布又は不織布よりなる多数の波板状ストリップが長手方向を平行として引き揃えられ、隣接する波板状ストリップの波の頂点部同士を接着剤等で接合したハニカム構造を有する。隣接する波板状ストリップ同士の間にポケット穴２５が形成される。ポケット穴２５は、上方に向って開放し、底部は一体形成又は底部シート２２によって閉鎖されている。波板状ストリップの厚さｔは０．１～０．７ｍｍ特に０．２～０．５ｍｍ程度が好ましい。 The lattice wall 21 is formed by arranging a large number of corrugated strips made of woven fabric or non-woven fabric of synthetic resin fibers such as polypropylene, polyethylene, nylon, polyethylene terephthalate, etc. with their longitudinal directions parallel to each other. It has a honeycomb structure in which the apexes of each are joined with an adhesive or the like. Pocket holes 25 are formed between adjacent corrugated strips. The pocket hole 25 opens upwards and is closed at the bottom by an integral or bottom sheet 22 . The thickness t of the corrugated strip is preferably about 0.1 to 0.7 mm, especially about 0.2 to 0.5 mm.

底部シート２２も、波板状ストリップと同様の織布又は不織布よりなる。底部シート２２の厚さは０．１～０．７ｍｍ特に０．２～０．５ｍｍ程度が好ましい。 The bottom sheet 22 also consists of a woven or non-woven fabric similar to the corrugated strip. The thickness of the bottom sheet 22 is preferably about 0.1-0.7 mm, more preferably about 0.2-0.5 mm.

ポケット穴２５の平面視形状は略方形（この実施の形態では略菱形）である。１個のポケット穴２５の開口面積は２，０００～１０，０００ｍｍ２特に３，０００～６，０００ｍｍ２程度が好ましい。 The planar view shape of the pocket hole 25 is approximately square (approximately rhomboid in this embodiment). The opening area of one pocket hole 25 is preferably about 2,000 to 10,000 mm 2 , particularly about 3,000 to 6,000 mm 2 .

ポケット穴２５の深さ、すなわち格子壁体２１の高さＨ１は４０～７０ｍｍ特に４５～６０ｍｍ程度が好適である。 The depth of the pocket hole 25, that is, the height H1 of the lattice wall 21 is preferably about 40 to 70 mm, particularly about 45 to 60 mm.

このようなハニカム構造体２０としては、ＴｅｎＣａｔｅ社から販売されているＡｃｃｏｒｄｅｒ（登録商標）等を用いることができる。このハニカム構造体は、人工芝生に比べて安価である。 As such a honeycomb structure 20, Accorder (registered trademark) sold by TenCate can be used. This honeycomb structure is less expensive than an artificial lawn.

なお、ハニカム構造体２０のポケット穴２５の平面視形状は、略方形に限定されるものではなく、略三角形、略六角形、略八角形や、略円形、略楕円形、略半円形、略半楕円形等であってもよい。 The plan view shape of the pocket hole 25 of the honeycomb structure 20 is not limited to a substantially square shape, and may be substantially triangular, substantially hexagonal, substantially octagonal, substantially circular, substantially elliptical, substantially semicircular, substantially semicircular, or substantially rectangular. It may be semi-elliptical or the like.

上層３は、人工芝生３０と、人工芝生３０の芝葉３２の間に充填された粒状物Ｓ’とで構成されている。人工芝生３０は、シート状基材３１と、該シート状基材３１から植え立てられたように起立する芝葉３２とを有する。 The upper layer 3 is composed of an artificial lawn 30 and granules S' filled between the grass leaves 32 of the artificial lawn 30. - 特許庁The artificial lawn 30 has a sheet-like base material 31 and turf leaves 32 standing up as if planted from the sheet-like base material 31 .

シート状基材３１は、ポリエチレン、ポリプロピレン、ナイロン、ポリエチレンテレフタレート等の合成樹脂繊維の織物シート等が用いられ、通常、その厚さは０．１～０．７ｍｍ特に０．２～０．５ｍｍ程度である。 As the sheet-like base material 31, a woven sheet of synthetic resin fibers such as polyethylene, polypropylene, nylon, polyethylene terephthalate, etc. is used, and the thickness is usually about 0.1 to 0.7 mm, particularly about 0.2 to 0.5 mm. is.

芝葉３２としては、ポリエチレン、ポリプロピレン、ナイロン、ポリ塩化ビニル、ポリ塩化ビニリデンなどからなる、緑色、白色、黄色又は青色等着色されたモノフィラメントヤーン、マルチフィラメントヤーン及びスリットヤーンなどが好適である。 As the lawn leaves 32, monofilament yarns, multifilament yarns, slit yarns, and the like made of polyethylene, polypropylene, nylon, polyvinyl chloride, polyvinylidene chloride, etc., colored green, white, yellow, blue, or the like are suitable.

シート状基材３１の上面からの芝葉３２の高さＨ２は４０～１２０ｍｍ特に５０～１２０ｍｍ程度が好ましい。 The height H2 of the lawn leaf 32 from the upper surface of the sheet - like base material 31 is preferably about 40-120 mm, more preferably about 50-120 mm.

このような人工芝生としては、市販のものを用いることができる。 A commercially available product can be used as such an artificial lawn.

次に、下層２及び上層３に用いられる粒状物Ｓ，Ｓ’について説明する。なお、粒状物の粒径はＪＩＳ篩による値である。 Next, the particles S and S' used for the lower layer 2 and the upper layer 3 will be explained. The particle size of the particulate matter is the value obtained by JIS sieve.

下層２の粒状物Ｓは、砂等の硬質粒状物、又はゴムチップあるいはプラスチック等の弾性粒状物を有している。下層２の粒状物Ｓは、弾性粒状物を５０体積％以下含有してもよく、好ましくは４０体積％以下、より好ましくは２０体積％以下、さらに好ましくは１０体積％以下であり、特に好ましくは硬質粒状物よりなる。粒状物Ｓの硬質粒状物としては、粒径が５ｍｍ以下、特に３ｍｍ以下の珪砂、その他の砂が好適である。このような砂の充填層は、やりが刺さり易く、また充填層の硬度のバラツキが小さい。 The granules S of the lower layer 2 comprise hard granules such as sand or elastic granules such as rubber chips or plastics. The granules S of the lower layer 2 may contain elastic granules in an amount of 50% by volume or less, preferably 40% by volume or less, more preferably 20% by volume or less, even more preferably 10% by volume or less, and particularly preferably Consists of hard granules. As the hard particles of the particles S, silica sand having a particle size of 5 mm or less, particularly 3 mm or less and other sands are suitable. Such a sand filling layer is easily penetrated by a spear, and the hardness variation of the filling layer is small.

ポケット穴２５には、粒状物Ｓがハニカム構造体２０の格子壁体２１の上端と面一状となるように充填される。格子壁体２１の上端面が見える程度であれば、若干量の粒状物が格子壁体２１の上端面に存在してもよい。 The pocket holes 25 are filled with the granular material S so as to be flush with the upper ends of the lattice walls 21 of the honeycomb structure 20 . A small amount of particulate matter may exist on the upper end surface of the lattice wall 21 as long as the upper end surface of the lattice wall 21 is visible.

なお、ハニカム構造体２０を用いることなく基礎１上に砂を直接に敷いて砂層を形成した場合、厚みが均一になるように砂層を形成することが容易ではない。また、施工後に踏んだ場合、砂が横方向に逃げて踏み跡（凹所）が生じ易くなるおそれがある。 When sand is directly laid on the foundation 1 to form a sand layer without using the honeycomb structure 20, it is not easy to form a sand layer with a uniform thickness. In addition, when stepped on after construction, there is a risk that sand will escape in the lateral direction, making it easier for footprints (recesses) to occur.

これに対し、基礎１上にハニカム構造体２０を配置してからポケット穴２５に砂を面一状に充填すると、均一厚みの砂層が容易に形成される。また、砂層が踏まれても、砂が横方向に逃げることがハニカム構造体２０によって防止され、踏み跡（凹所）が生じることが防止される。 On the other hand, when the honeycomb structure 20 is placed on the foundation 1 and then the pocket holes 25 are filled with sand in a flush manner, a sand layer having a uniform thickness is easily formed. Moreover, even if the sand layer is stepped on, the honeycomb structure 20 prevents the sand from escaping in the lateral direction, thereby preventing the formation of footprints (recesses).

本発明では、ポケット穴２５に砂等を充填して形成した充填層の山中式土壌硬度計による平均表面硬さが０．５～３０ｋｇ／ｃｍ２であり、かつ１０回以上計測したときの表面硬さ測定値の標準偏差が１０ｋｇ／ｃｍ２以下であることが好ましい。より好ましくは、充填層の山中式土壌硬度計による平均表面硬さが１～２０ｋｇ／ｃｍ２、かつ１０回以上計測したときの表面硬さ測定値の標準偏差が８ｋｇ／ｃｍ２以下であり、特に好ましくは充填層の山中式土壌硬度計による平均表面硬さが３～１０ｋｇ／ｃｍ２、かつ１０回以上計測したときの表面硬さ測定値の標準偏差が６ｋｇ／ｃｍ２以下である。上述の表面硬さ特性であると、やりが刺さり易く、またやりの先端が基礎１に達することなく下層２の途中で停止し易い。 In the present invention, the average surface hardness of the filling layer formed by filling sand or the like in the pocket hole 25 is 0.5 to 30 kg/cm 2 as measured by the Yamanaka soil hardness tester, and the surface is measured 10 times or more. It is preferable that the standard deviation of hardness measurements is 10 kg/cm 2 or less. More preferably, the average surface hardness of the packed bed measured by a Yamanaka soil hardness tester is 1 to 20 kg/cm 2 , and the standard deviation of the surface hardness measurement values is 8 kg/cm 2 or less when measured 10 times or more, Particularly preferably, the packed bed has an average surface hardness of 3 to 10 kg/cm 2 by a Yamanaka soil hardness tester, and a standard deviation of 6 kg/cm 2 or less of the surface hardness measured value when the measurement is performed 10 times or more. With the surface hardness characteristics described above, the spear tends to stick and the tip of the spear tends to stop in the middle of the lower layer 2 without reaching the base 1 .

上層３の粒状物Ｓ’は、粒径が３ｍ以下、好ましくは２．３６ｍｍ以下程度の砂等の硬質粒状物よりなることが好ましいが、ゴム等よりなる弾性粒状物を４０体積％以下程度含んでもよい。上層３においては、硬質粒状物と弾性粒状物が混合されていてもよく、硬質粒状物と弾性粒状物とが積層構造を有していてもよい。 The granules S′ of the upper layer 3 are preferably made of hard granules such as sand having a particle size of 3 m or less, preferably 2.36 mm or less, but contain 40% by volume or less of elastic granules made of rubber or the like. It's okay. In the upper layer 3, the hard granules and the elastic granules may be mixed, and the hard granules and the elastic granules may have a laminated structure.

粒状物Ｓ’は、その充填層厚さＨ３が芝葉３２の高さＨ２の３５～９５％特に５０～９０％程度となるように芝葉３２間に充填されることが好ましい。 The granules S′ are preferably filled between the grass leaves 32 so that the filling layer thickness H 3 is 35 to 95%, especially about 50 to 90% of the height H 2 of the grass leaves 32 .

粒状物Ｓの層厚さ（Ｈ１）と粒状物Ｓ’の層厚さ（Ｈ３）との合計Ｈ１＋Ｈ３は６０ｍｍ以上、例えば６０～１６０ｍｍ特に９０～１２０ｍｍ程度であることが好ましい。この合計厚さとすることにより、突き刺さったやりの先端が基礎１にまで達することが十分に防止される。 The total H 1 +H 3 of the layer thickness (H 1 ) of the granular material S and the layer thickness (H 3 ) of the granular material S' is preferably 60 mm or more, for example, 60 to 160 mm, particularly about 90 to 120 mm. This total thickness sufficiently prevents the pierced spear tip from reaching the foundation 1 .

［参考例１～３］
下層２を形成するためのハニカム構造体２０として、図２～４に示すＴｅｎＣａｔｅ社製Ａｃｃｏｒｄｅｒ（登録商標）を用いた。ポケット穴の開口面積は４，０００～４，５００ｍｍ２、深さは５０～６０ｍｍである。 [Reference Examples 1 to 3]
As the honeycomb structure 20 for forming the lower layer 2, Accorder (registered trademark) manufactured by TenCate Corporation shown in FIGS. 2 to 4 was used. The pocket hole has an opening area of 4,000 to 4,500 mm 2 and a depth of 50 to 60 mm.

このＡｃｃｏｒｄｅｒのポケット穴に、表１に示す粒状物を充填し、ローラーコンパクターを用いて締固め荷重９００ｋｇｆで締め固めて下層２を形成した。この下層２の充填層の土壌硬度（ｋｇ／ｃｍ２）を山中式土壌硬度計（木屋製作所社製、型番D244）で測定した。結果を表１に示す。 The pocket holes of the Accorder were filled with the granules shown in Table 1 and compacted with a compaction load of 900 kgf using a roller compactor to form the lower layer 2 . The soil hardness (kg/cm 2 ) of the packed layer of the lower layer 2 was measured with a Yamanaka soil hardness tester (manufactured by Kiya Seisakusho, Model No. D244). Table 1 shows the results.

Figure 0007155982000001
Figure 0007155982000001

［実施例１］
砕石よりなる基礎１の上に、参考例１の下層２を設け、その上に人工芝生（株式会社アストロ製、スポーツ用ロングパイル人工芝、パイル長さ４０ｍｍ）を設けた。粒状物Ｓ，Ｓ’として参考例１の砂を用いて、人工芝生敷設構造を形成した。上層３の砂層の厚さＨ３は１５ｍｍとした。 [Example 1]
A lower layer 2 of Reference Example 1 was provided on a foundation 1 made of crushed stone, and an artificial lawn (manufactured by Astro Co., Ltd., long pile artificial lawn for sports, pile length 40 mm) was provided thereon. Using the sand of Reference Example 1 as the particles S and S', an artificial lawn laying structure was formed. The thickness H3 of the sand layer of the upper layer 3 was set to 15 mm.

この人工芝生敷設構造に対して、鉛直上方４５０ｃｍの高さ（やり下端高さ）から、長さ２６３ｃｍの投てき競技用やりを鉛直下方に自由落下させ、やりの刺さり状況を観察した。結果を表２に示す。 A spear for throwing competition with a length of 263 cm was allowed to freely fall vertically downward from a height of 450 cm vertically above the artificial lawn laying structure (height of the lower end of the spear), and the state of penetration of the spear was observed. Table 2 shows the results.

［実施例２］
実施例１において、粒状物Ｓとして参考例２で用いたものを充填した。その他は実施例１と同一条件とした。結果を表２に示す。 [Example 2]
In Example 1, the granular material S used in Reference Example 2 was filled. The other conditions were the same as in Example 1. Table 2 shows the results.

［比較例１］
下層２を、Ｔｒｏｃｅｌｌｅｎ社製ＸＣＦｏｒｍよりなるアンダーパット（厚さ１０ｍｍ）で構成した。その他は実施例１と同一条件とした。結果を表２に示す。 [Comparative Example 1]
The lower layer 2 was composed of an underpad (thickness 10 mm) made of XCForm manufactured by Trocellen. The other conditions were the same as in Example 1. Table 2 shows the results.

Figure 0007155982000002
Figure 0007155982000002

＜考察＞
実施例１のように、ポケット穴に２．３６ｍｍ以下の粒径を持つ割合が９０％以上である砂を充填した場合には、土壌硬度計が安定した硬度を示すとともに、適度な硬度を持つことから、やりが安定して刺さる。 <Discussion>
As in Example 1, when the pocket holes were filled with sand having a particle size of 2.36 mm or less at a rate of 90% or more, the soil hardness tester showed stable hardness and moderate hardness. Therefore, the spear stings stably.

実施例２（ポケット穴に、２．３６ｍｍ以下の粒径を持つ割合が９０％以上である砂８０％と弾性粒状物、２０％混合充填）の場合には、該混合物に含まれる弾性粒状物の弾性特性の影響を受けて、やりが弾かれる傾向にある。 In the case of Example 2 (filling the pocket hole with 80% sand and 20% elastic granules with a ratio of 90% or more having a particle size of 2.36 mm or less), the elastic granules contained in the mixture Affected by the elastic properties of, the spear tends to be repelled.

比較例１のように、クッション性の高い材料よりなるシートで下層を形成した場合は、その弾性特性の影響を受けて、やりが弾かれる傾向が顕著になる。 As in Comparative Example 1, when the lower layer is formed of a sheet made of a material with high cushioning properties, there is a pronounced tendency to repel spears under the influence of its elastic properties.

なお、やりを手で投げて上記の各人工芝生敷設構造に斜め（約４５°）に刺さるようにして試験した結果も、同様の傾向となることが認められた。 A similar tendency was observed in the results of testing by throwing a spear by hand and sticking it obliquely (about 45°) into each of the above artificial lawn-laying structures.

１ 基礎
２ 下層
３ 上層
２０ ハニカム構造体
２１ 格子壁体
２２ 底部シート
２５ ポケット穴
３０ 人工芝生
３１ シート状基材
３１ 芝葉 Reference Signs List 1 foundation 2 lower layer 3 upper layer 20 honeycomb structure 21 lattice wall 22 bottom sheet 25 pocket hole 30 artificial lawn 31 sheet-like substrate 31 grass leaf

Claims (8)

基礎と、
該基礎上に設けられた、粒状物を含む下層と、
該下層の上に設けられた、粒状物を含む人工芝生と
を有する人工芝生敷設構造において、
該下層は、上面が開放し、底面が閉鎖された穴よりなるポケット穴を有したハニカム構造体を備え、
該ハニカム構造体は、ハニカム状格子壁体と、該ハニカム状格子壁体と一体形成された底面とを備えており、
該ポケット穴に前記粒状物がハニカム構造体の上面と面一状に充填されていることを特徴とするやり投てき用人工芝生敷設構造。 foundation and
a particulate-containing lower layer provided on the foundation;
and an artificial lawn containing particulate matter provided on the lower layer,
The lower layer comprises a honeycomb structure having pocket holes with open tops and closed bottoms,
The honeycomb structure includes a honeycomb lattice wall body and a bottom surface integrally formed with the honeycomb lattice wall body,
An artificial turf-laying structure for javelin throwing, wherein the pocket holes are filled with the granular material so as to be flush with the upper surface of the honeycomb structure. 前記ポケット穴に充填された前記粒状物中の弾性粒状物の割合が５０体積％以下であることを特徴とする請求項１に記載のやり投てき用人工芝生敷設構造。 2. The structure for laying a javelin-throwing artificial lawn according to claim 1, wherein the percentage of said elastic particles in said particles filled in said pocket holes is 50% by volume or less. 前記ポケット穴に充填された前記粒状物は、硬質粒状物よりなるか、又は硬質粒状物を主体とするものであることを特徴とする請求項１又は２に記載のやり投てき用人工芝生敷設構造。 3. The structure for laying a javelin-throwing artificial lawn according to claim 1 or 2, wherein said granular materials filled in said pocket holes are made of hard granular materials or consist mainly of hard granular materials. . 前記ポケット穴に充填された粒状物の充填層は、山中式土壌硬度計による平均表面硬さが０．５ｋｇ／ｃｍ２以上３０ｋｇ／ｃｍ２以下、かつ１０回計測したときの該表面硬さ測定値の標準偏差が１０ｋｇ／ｃｍ２以下であることを特徴とする請求項１～３のいずれか１項に記載のやり投てき用人工芝生敷設構造。 The packed layer of the granular material filled in the pocket hole has an average surface hardness of 0.5 kg/cm 2 or more and 30 kg/cm 2 or less by a Yamanaka soil hardness tester, and the surface hardness is measured 10 times. The artificial lawn-laying structure for javelin throwing according to any one of claims 1 to 3, characterized in that the standard deviation of the values is 10 kg/cm 2 or less. 前記ポケット穴に充填された粒状物の粒径が５ｍｍ以下であることを特徴とする請求項１～４のいずれか１項に記載のやり投てき用人工芝生敷設構造。 The artificial lawn-laying structure for javelin-throwing according to any one of claims 1 to 4, characterized in that the particle size of the particles filled in the pocket holes is 5 mm or less. 前記ハニカム構造体の前記ポケット穴の開口面積が２，０００～１０，０００ｍｍ２であることを特徴とする請求項１～５のいずれか１項に記載のやり投てき用人工芝生敷設構造。 The artificial lawn-laying structure for javelin throwing according to any one of claims 1 to 5, wherein the opening area of the pocket holes of the honeycomb structure is 2,000 to 10,000 mm 2 . 前記ハニカム構造体は合成樹脂繊維の織布又は不織布よりなることを特徴とする請求項１～６のいずれか１項に記載のやり投てき用人工芝生敷設構造。 The artificial lawn-laying structure for javelin throwing according to any one of claims 1 to 6, wherein the honeycomb structure is made of woven or non-woven fabric of synthetic resin fibers. 前記下層の粒状物の厚さＨ１と、前記人工芝生の前記粒状物の厚さＨ３との合計Ｈ１＋Ｈ３が６０～１６０ｍｍであることを特徴とする請求項１～７のいずれか１項に記載のやり投てき用人工芝生敷設構造。 The total H 1 +H 3 of the thickness H 1 of the granules of the lower layer and the thickness H 3 of the granules of the artificial lawn is 60 to 160 mm. The artificial lawn-laying structure for javelin throwing according to item 1.
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JP2016511346A (en) 2013-02-18 2016-04-14 プロフェッショナル スポーツヴェルド フットボル、 エス． エル． Lawn system for sports and garden surfaces and method for cultivating lawn with said system

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