JP2004084257A

JP2004084257A - Snow fence

Info

Publication number: JP2004084257A
Application number: JP2002245988A
Authority: JP
Inventors: Yoshi Demachi; 出町　好
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-26
Filing date: 2002-08-26
Publication date: 2004-03-18
Anticipated expiration: 2022-08-26
Also published as: JP3785621B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snow fence formed of a new structure making it possible to prevent strong winds or snow storms from blowing against pedestrians, relating to a snow protection facility that is installed on the windward side of a road, parking lot or other above-ground part for snow protection in order to prevent snow from blowing and collecting in the above-ground part in snow storms while also preventing whiteouts, etc. <P>SOLUTION: The snow fence 1 comprises a plurality of snow protection plates 3 bridged between posts 2, 2 which adjoin each other along the windward side. An opening/closing angle adjusting mechanism 4, which enables the snow protection plates to selectively assume any of three positions, a blocking position, a blow-away position, and a passing position, or two of the positions with either of the plates not assuming the blow-away position, and to be temporarily fixed in these positions, is provided between the snow protection plates 3, 3 and the posts 2, 2 at about 1-2 m from the ground. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の目的】
この発明は、道路や駐車場、その他の防雪対象地上部の風上側に設置され、吹雪による防雪対象地上部への雪の吹き溜まりや積雪、ホワイトアウト現象等の発生を防止可能とする防雪施設に関するものであって、特に、歩道を行き交う歩行者への強風や吹雪の吹き付け等を防止することも可能にするようにした新規な構造からなる防雪柵を提供しようとするものである。
【０００２】
【従来の技術】
気温が氷点下で雪が降った直後に強風に見回れると、粉状の新雪が強い風の吹き付けによって吹き飛ばされ、地表から１〜２ｍの範囲に粉雪が舞い上がって極めて濃い霧状となって視界を完全に遮ってしまう地吹雪が発生し、これに降雪を伴ってしまうと降ってきた雪粒も加わって状況は最悪で、路上の吹き溜まりや視界不良によって交通障害を引き起こし、脱輪や衝突事故を多発するだけではなく、通行止めとなって産業活動に多大の損害をもたらしたり、閉じ込められた車の中でガス中毒死や凍死に至らしむることさえも稀ではない。
【０００３】
吹雪による道路上への雪の吹き溜まりや視程の減少を防止し、良好な交通を確保すると共に、除雪作業を軽減する手段として多種、多様な防雪柵が開発、実用化されており、特に最近主流をなす防雪柵としては、風を集めて路面に吹き付け、路面に溜まる雪を吹き払ってしまう、所謂吹き払い式防雪柵があり、風を集める風受け板（別称、整流板、防雪板等）に工夫を加えたものとして、例えば、特開平１０−２９２３１９号公報に開示された整流板を湾曲形状とすることによって整流効果を高め、風速を向上して路面上の積雪を効率的に拭き払うことができる「拭払式防雪柵」発明をはじめ多数があり、また、不要時（降雪時期以外の期間）の景観維持のために分解、収納に特徴のあるものとしては、例えば、特開平７−６２６１４号公報記載の発明のように、冬期以外の不要期間には、道路脇の法面に沿って略路面に面一状とするように収納可能とし、車両通行の邪魔にならないよう構成した「防雪柵装置」外多数があり、更には、登録実用新案第３０６１３５５号「下部閉塞吹き払い防雪柵」考案に提案のあるように、従来からの全面吹き払い構造の防雪柵を改良し、上部だけは従前からの吹き払い式防雪柵とするものの、下部は地上から略垂直に立ち上げた壁状の閉塞板とし、防雪柵際の地上部近くを強風から守るようにしたもの等も散見される。
【０００４】
しかし、従前からのこれら吹き払い式防雪柵は、いずれも通行車両の視界以下となる地上１〜１．２ｍ前後の範囲に整流板または防雪板を設けず、下部間隙を形成して同下部間隙の上側に上下複数枚の防雪板を夫々横架する略門型構造をなすよう形成されたものとなっていて、歩道を有する通学路や生活道路に設置された場合には、地上１〜１．２ｍ前後のところを強風が拭き抜け、凍結や積雪した歩道路面を歩く比較的体の小さな小学生や高齢者等が強風に煽られてしまい、自動車や大型トラック等が頻繁に走行する車道の傍らであるにも拘らず、安全な通行を確保することができなくなることが危惧されるものであった。
【０００５】
このような懸念を払拭するものとして、前記したとおり、従前からの吹き払い式防雪柵を改良した実用新案登録第３０６１３５５号公報掲載の「下部閉塞吹き払い防雪柵」考案では、確かに下部間隙を平板状の下部閉塞板によって閉塞してあって、歩行者を強風や吹雪から保護できるように配慮したものとはなっているものの、このように下部間隙を完全に閉塞したままの構造としてしまうものでは、単に整流板等のない（路面等の雪を吹き払う上で必要がない）箇所である防雪柵下部の間隙を、整流板等とは関係のない防風板で閉塞したに過ぎない、換言するならば、空いている空間を板で蓋をしたに過ぎない程度の改良技術であって、防雪柵が設置される地域の風況や地形の違い、あるいは防雪柵際となる路面の用途の違い等に応じ、下部閉塞板の取付け構造を最適な状態に変更、対応するようにすることが不可能なものであって、実用上で問題があるだけではなく、現場における施工においても、施工内容が違って作業効率を落すと共に、部品点数も増えるという不都合も加わり、全体として不経済なものになってしまうという欠点があった。
【０００６】
この発明は、以上のように吹雪が発生したときに、道路上の積雪を吹き払い、視界を確保して車両の安全な通行を可能とする防雪柵が、歩道の有無や地域毎の吹雪の発生条件、平地や山間部等の地形の変化等に応じて、下部間隙の形状や開度を変更することができず、様々な地理的条件を考慮した上で、多様な構造の防雪柵の中から、設置個所に最適なものを選択しなければならず、選定に多大な時間と労力とを要するものとなってしまい、しかも一旦選択を誤ると、構造の見直し変更が困難であるという事情に疑問を抱き、同一の構造であっても地理的条件や歩行者の有無等に随時対応して吹止め、吹払い、吹抜け等の設定変更を可能にすることはできないものかとの判断から、逸速くその開発、研究に着手し、長期に渡る試行錯誤と幾多の試作、実験とを繰り返してきた結果、今回、遂に新規な構造の防雪柵を実現化することに成功したものであり、以下では、図面に示すこの発明を代表する実施例と共に、その構成を詳述することとする。
【０００７】
【発明の構成】
図面に示すこの発明を代表する実施例からも明確に理解されるように、この発明に包含される防雪柵は、基本的に次のような構成から成り立っている。
即ち、道路等防雪対象地上部の風上側に沿って所定間隔を隔て鉛直状に立設した複数本の支柱の隣接する支柱間夫々に、上下複数枚を一組とした防雪板を横架状に配設するものとし、それら一組の防雪板の中、少なくとも地上から１〜２ｍ前後の所定範囲までに属すこととなる一枚またはそれ以上の防雪板夫々と、その両端に位置する各支柱との間には、各防雪板が略垂直状となる吹止め姿勢、下端縁を風下側に３０゜〜４５゜前後の角度に傾斜させて半開放状とする吹払い姿勢、略水平状として全開放状とする吹抜け姿勢の三態の姿勢の全ての姿勢に適宜選択的に変更、仮固定可能とする開閉角度調節機構を設けてなるものとした構成を要旨とする防雪柵である。
【０００８】
この基本的な構成からなる防雪柵には、道路等防雪対象地上部の風上側に沿って所定間隔を隔て鉛直状に立設した複数本の支柱の隣接する支柱間夫々に、上下複数枚を一組とした防雪板を横架状に配設するものとし、それら一組の防雪板の中、少なくとも地上から１〜２ｍ前後の所定範囲までに属すこととなる一枚またはそれ以上の防雪板夫々と、その両端に位置する各支柱との間には、各防雪板が略垂直状となる吹止め姿勢、下端縁を風下側に３０゜〜４５゜前後の角度に傾斜させて半開放状とする吹払い姿勢、略水平状として全開放状とした吹抜け姿勢とする三態の姿勢の全ての姿勢、または何れかが吹払い姿勢を除いた二態の姿勢に適宜選択的に変更、仮固定可能とする開閉角度調節機構を設けてなるものとした防雪柵が包含されている。
【０００９】
上記構成からなる防雪柵は、より具体的には、道路等防雪対象地上部の風上側に沿って所定間隔を隔て鉛直状に立設した複数本の支柱の隣接する支柱間夫々に、上下複数枚を一組とした防雪板を横架状に配設するものとし、それら一組の防雪板の中、少なくとも地上から１〜２ｍ前後の所定範囲までに属すこととなる一枚またはそれ以上の防雪板は、全てまたは一部を垂直状姿勢としたときに所定範囲を実質的に一枚板状の吹止め壁状となし得るよう、相互の上下間隔が規制された寸法に設定されると共に、それら防雪板夫々と、その両端に位置する各支柱との間には、各防雪板が略垂直状となる吹止め姿勢、下端縁を風下側に３０゜〜４５゜前後の角度に傾斜させて半開放状とする吹払い姿勢、略水平状として全開放状とした吹抜け姿勢とする三態の姿勢の全ての姿勢、または何れかが吹払い姿勢を除いた二態の姿勢に適宜選択的に変更、仮固定可能とする開閉角度調節機構を設けてなる構成とした防雪柵ということができる。
【００１０】
支柱は、上下複数枚一組の防雪板の両端を、各防雪板の所望する高さ位置毎に強風や着雪に耐える十分な強度をもって支持する機能を果たすものであり、少なくとも二本一対が、防雪板を横架状に支持できる間隔を隔てて略鉛直状に立設させたものとし、さらに、同様の間隔を隔てて複数本が略一線状に林立するよう設置して隣接する支柱間の夫々に一組ずつの防雪板を装着できるよう形成したものにすると共に、各防雪板端部との間に防雪板の開閉角度を適宜調節可能とする開閉角度調節機構を組み込んだものとしなければならず、夫々が一本の柱状に形成されたもの、あるいは複数本の棒体を一体に組み合わせて骨格状の枠型柱状に形成したもの等とすることが可能であり、冬期以外の不要期間は、折り畳んで小型化できる折り畳み機構や、分解して撤去できるようにした分解機構等を組み込んだものとすることができる。
【００１１】
防雪板は、略垂直姿勢に支持されることにより、風上から吹き付ける風雪を堰止めて道路等防雪対象地上部への風雪の吹き付けを阻止し、また、略水平姿勢に支持されたときには、風上から吹き付ける風をそのまま通過させてしまうものとなり、さらに、下端縁を風下側に所望角度傾斜させた姿勢とすることにより、風上から吹き付ける風雪を道路等防雪対象地上面へ向けて強制的に誘導、吹き付け、同防雪対象地上面へ降り積もろうとする雪を吹き払い、その積雪を阻止するという三態に対応した機能を選択的に果たし得るものであり、風雪による風圧や着雪による荷重、凍結等に耐える十分な強度を有する素材および構造を有するものとしなければならず、必要に応じて網目や多数の小孔を穿孔する等して通気性を確保したり、透光性を有する素材を用いることも可能であり、上下複数枚の中、所定範囲内の複数枚の防雪板は、夫々両端支柱への取着部が、その上下間隔を防雪板の上下巾に略匹敵する寸法から、その略半分に相当する寸法までのものに規制されてなるものとすることができる。
【００１２】
したがって、防雪板は、上下複数枚を略垂直状の姿勢としたときに、上下所定範囲内の互いに一部重なり状となった吹止め壁状とする構造や、連続する端部同士を略一直線状に連続する構造とすることが可能であり、また、所定範囲内全ての防雪板を吹止め姿勢とした吹止め壁状と、一枚を吹抜け姿勢とし、その上下のものだけを吹止め姿勢とした吹止め壁状とすることも可能である。さらに、最上位の防雪板が水平となって、所定範囲外の斜設防雪板からの吹払い風が人に当たらないよう廂的機能を果たすようにすることも可能であり、勿論全ての防雪板が角度調節可能となる構造とすることができる。
【００１３】
開閉角度調節機構は、支柱間にある各防雪板の各支持姿勢を必要に応じて個別に適宜変更、および仮固定可能とする機能を果たすものであり、防雪板が略垂直状となる吹止め姿勢、下端縁を風下側に３０゜〜４５゜前後の角度に傾斜させて半開放状とする吹払い姿勢、略水平状として全開放状とした吹抜け姿勢とする三態の姿勢の全ての姿勢、または何れかが吹払い姿勢を除いた二態の姿勢に適宜選択的に変更、仮固定可能とするものとしなければならない。
【００１４】
しかも、隣接する支柱間の上下複数枚を一組とした防雪板であって、所定範囲内の複数枚の防雪板は、その中の最上位の防雪板だけが、三態全ての姿勢に適宜選択的に変更、仮固定可能とする開閉角度調節機構を付設したものとし、その他の防雪板は吹抜け姿勢を除いた二態の姿勢に適宜選択的に変更、仮固定可能とするようにしたものや、あるいは、上下所定範囲内の複数枚の防雪板は、夫々両端支柱への取着部に開閉角度調節機構が組み込まれ、それら各開閉角度調節機構が、支柱中途部適所に防雪板の回動軸心に略垂直に交叉するよう固着、一体化されたフランジ部と、防雪板の左右端縁中央に略同心状に突設された四角柱型の支持軸部に、水平方向断面が略Ｕ形に形成され、支持軸部を９０゜単位の角度姿勢毎に回動不能に連結可能とする嵌合部を有し、該フランジ部に対し、略Ｕ型断面の開口を鉛直上方に向けた姿勢か、もしくは風上方向に３０゜〜４５゜前後の角度に傾けて上方向に向けた姿勢の何れかにボルト・ナットを用いて選択的に仮固定可能とした回動取付け金具部とからなるものに形成されたものとすることができる。
【００１５】
また、開閉角度調節機構は、隣接する支柱間の上下複数枚を一組とした防雪板中、最下位に位置する防雪板を支持する最下位の開閉角度調節機構のみが、支柱中途部適所に対してフランジ部が、防雪板の回動軸心に略垂直に交叉するよう固着、一体化され、防雪板の左右端縁中央に略同心状に突設された四角柱型の支持軸部を、９０゜単位の角度姿勢毎に回動不能に連結可能とするよう水平方向断面が略Ｕ形に形成された嵌合部の複数を、それよりも上方の個所から取り外され、垂直状の姿勢とした複数枚の防雪板が、積層状に保持可能となるよう、夫々の略Ｕ型断面の開口を鉛直上方に向けた姿勢として該フランジ部の風上側から風下側に略水平状に連なるよう形成してなるものとすることができる。　　　　　　以下、図面に示すこの発明を代表する実施例と共に、その構造について詳述していくこととする。
【００１６】
【実施例】
図１の防雪柵の正面図、図２の防雪柵の側面図、図３の上部に配置された防雪板一部の斜視図、図４の下部に配置された防雪板一部の斜視図、図５の開閉角度調節機構の斜視図、図６の分解された開閉角度調節機構の斜視図、図７の支柱を挟んで設けられた開閉角度調節機構の斜視図、図８の支柱を挟んで設けられた開閉角度調節機構の断面図に示される事例は、上下複数枚を一組とした防雪板を一対の支柱間の地上面付近から上端付近にかけて横架状に配設し、地上面付近から１〜２ｍ前後の所定範囲に属する防雪板、およびそれよりも上方に位置するその外の防雪板の夫々の端部と、各支柱との間に、各防雪板の角度姿勢を適宜変更可能とする開閉角度調節機構を設けた基本的構成からなるこの発明に包含される防雪柵における代表的な一実施例を示すものである。
【００１７】
当該防雪柵１は、歩道を有する道路（防雪対象地上部）の風上側に沿って設置されたものとなっており、歩道脇に沿って所定間隔を隔てた位置の夫々に、図１および図２中に示されるように、地中に埋設された基礎ブロック２１、および同基礎ブロック２１の略中央を貫通して地盤中に強固に固定された基礎杭２２を設け、各基礎杭２２の上端側には、アンカーボルト２３を介して下部支柱２４およびその上部に連結された上部支柱２５からなる支柱２，２が確りと立設状に支持されたものとなっている。
【００１８】
下部支柱２４は、後述する防雪板３の巾寸法よりも僅かに長い高さ寸法に設定され、風上側に立設された棒状枠部２６と、これと同一の長さ寸法に設定され、所定間隔を隔て風下側に平行状に立設、配置された棒状枠部２７とを有し、各棒状枠部２６，２７の下端部には一枚の下部ベースプレート２８が、上端にも一枚の上部ベースプレート２８が夫々水平状に結合され、該下部ベースプレート２８がアンカーボルト２３を介して基礎ブロック２１および基礎杭２２に結合されたものとなっており、棒状枠部２６，２７の上下略中央となる位置には、開閉角度調節機構４の一部を形成するフランジ部４１が掛け渡し状に一体化されたものとなっている。
【００１９】
上部支柱２５は、防雪板３巾寸法の４枚分よりも僅かに長い高さ寸法に設定した風上側の棒状枠部２６と、これに所定間隔を隔てた風下側に、略同様の高さ寸法に設定され、平行状に配置された棒状枠部２７とを有し、該棒状枠部２７の上端が風上側に向けて折曲されて棒状枠部２６の上端に結合することにより骨格枠形状となし、左右上部支柱２５，２５上端間に連結パイプ２９を横架して門型構造に形成されている。風上風下の棒状枠部２６，２７間の上下所定間隔毎の四個所には、夫々開閉角度調節機構４の一部を形成するフランジ部４１，４１，……が掛け渡し状に一体化されたものとなって前後の棒状枠部２６，２７を一体に連結したものとなっている。
【００２０】
防雪板３は、所定間隔を隔てて隣接する一対の支柱２，２間に横架状となる長さと、所定巾寸法とに設定された略長方形状であって水平方向断面が、図３中に示すように、波板状の凹凸断面形に形成され、左右両端部の夫々には、補強枠３１，３１が結合され、各補強枠３１の略中央には、開閉角度調節機構４の一部を形成する略角柱状の支持軸部３２，３２が、水平且つ同心状に突設されたものとなっている。さらに、防雪板３，３，……の中、下側に配置される二枚は、図４中に示すように、僅かな通気を可能とするよう多数の小孔が穿孔されている。
【００２１】
各防雪板３と、支柱２との間には、夫々開閉角度調節機構４が設けられており、この中、下部支柱２４，２４と防雪板３との間に夫々設けられた左右の開閉角度調節機構４は、図２および図１２の防雪柵の側面図に示されるように、互いに左右対象形状であって、フランジ部４１の側面に、支持軸部３２の角柱断面形状を上方から嵌合状に装着可能とする、略Ｕ型状に形成された嵌合部４２，４２，……の五個が、風上側の棒状枠部２６から風下側の棒状枠部２７までの間に、略水平状に配列され、互いの間隔を防雪板３の厚み寸法を僅かに越える寸法に設定したものとし、左右何れか同心状となる一対の嵌合部４２，４２間に防雪板３を９０゜単位毎に角度調節可能とするよう仮固定可能な構造とした上、冬期以外の取り外された、上段に設置される四枚の防雪板３，３，……を、風上側の棒状枠部２６から風下側の棒状枠部２７までの間に、縦姿勢に積層状とするよう横架、収納可能な構造となっている。
【００２２】
防雪板３支持軸部３２，３２の夫々には、その四角形断面を十字状に貫通する固定孔が穿孔されており、また、嵌合部４２，４２の略Ｕ型状断面の対応する底面個所にも同様の固定孔が穿孔され、これら固定孔同士を同心状に配置して抜け止め構造を有する図示しない仮固定ピンを装着して脱抜不能に仮固定するものとなっており、したがって、下部支柱２４，２４間に横架された防雪板３は、その開閉角度調節機構４，４により、垂直状の吹止め姿勢と、水平状の吹抜け姿勢との何れかの姿勢を任意に選択して仮固定することができるものとなる。
【００２３】
また、上部支柱２５，２５と四枚の防雪板３，３，……との間の夫々の個所には、構造を変更したことにより、前述のような複数枚の防雪板３を収納する構造をもたず、防雪板３を傾斜状の姿勢に支持可能とした開閉角度調節機構４が設けられ、その構造は、防雪板３を挟んで左右対象形状となっており、各フランジ部４１は、図５および図６中に示すように、防雪板３の回動軸心に垂直状に交叉するよう配置、形成され、フランジ部４１と支持軸部３２との間には、フランジ部４１に接合する円盤部４５と、水平方向断面がＵ形で、支持軸部を９０゜単位の角度姿勢毎に回動不能に連結可能とする嵌合部４２とを一体化してなる回動取付け金具部４４が装着され、回動取付け金具部４４円盤部４５には、嵌合部４２を挟んで１８０゜を隔てた位置に一対の仮固定用の貫通孔４６，４６を厚み方向に穿孔し、これに対応するフランジ部４１にも、嵌合部４２のＵ形開口を鉛直上方に向けた姿勢に仮固定可能な貫通孔４７，４７を穿孔し、さらに、嵌合部４２のＵ形開口を風上方向（風上側の棒状枠部２６側）に３０゜〜４５゜前後の角度に傾け、上方に向けた姿勢との夫々に仮固定、可能とする貫通孔４７，４７を穿孔し、ボルト・ナット４８を用いることにより、防雪板３を水平状姿勢、垂直状姿勢、あるいは下端を風下側へ３０゜〜４５゜前後の角度に傾けた姿勢の何れかに仮固定可能なものとしてある。
【００２４】
さらに、図７および図８中に示すように、三本以上の支柱２を互いに所定間隔を隔てて立設し、支柱２を挟んで防雪板３，３を装着する場合には、フランジ部４１を挟んで同一構造のニ個の回動取付け金具部４４，４４を、ボルト・ナット４８，４８によって共締めして仮固定できるよう形成されている。
【００２５】
【作用】
以上のとおりの構成からなるこの発明の防雪柵は、図１〜図８、図９の開閉角度調節機構の正面図、図１０の吹払い姿勢に調整した開閉角度調節機構の正面図、図１１の角度調節される防雪板の側面図、図１２の防雪板を吹止め姿勢に角度調節された防雪柵の側面図、図１３の防雪板を吹払い姿勢に調節する防雪柵の側面図、図１４の利用状態にある防雪柵の正面図、および図１５の利用状態にある防雪柵の側面図に示されるように、道路（防雪対象地上部）の風上側に沿って立設された支柱２，２，……の上下間に横架された五枚の防雪板３，３，……の中、最下位の防雪板３を、垂直状の姿勢とするよう左右支持軸部３２，３２を夫々対応する嵌合部４２，４２に装着し、仮固定すると共に、その外の上側の四枚を支持する各回動取付け金具部４４，４４，……の取付け角度を、図９中に示すように、嵌合部４２の断面Ｕ形状の開口を鉛直上方に向けた状態に仮固定し、各四枚の防雪板３，３，……を垂直状の姿勢に取り付け、全五枚の防雪板支持軸部３２，３２，……を、夫々装着した嵌合部４２，４２，……に仮固定ピン４３，４３，……を用いて脱落しないよう確りと固定することにより、吹止め姿勢となった各防雪板３，３，……同士が、その上下方向端縁部同士を連続状として一枚の壁を形成することとなり、風上から吹き付ける風雪を塞き止め、図１２および図１４中に示すように、歩道を含む道路（防雪対象地上部）に、風雪が及ぶことを阻止するものとなり、地吹雪が強く吹き溜まりとなり易い、比較的積雪の少ない地域等に有効な構造となる。
【００２６】
また、上側四枚の防雪板３，３，……を支持する、回動取付け金具部４４，４４，……を、各嵌合部４２，４２，……の断面Ｕ形の開口が、風上側（風上側の棒状枠部２６側）に向けて３０゜〜４５゜前後の角度に傾け、上方に向けた状態に仮固定し、各防雪板３，３，……を、下端が風下側（風下側の棒状枠部２７側）に傾斜された状態に装着し、仮固定ピン４３，４３，……を用いて固定して各上側四枚の防雪板３，３，……を吹払い姿勢に仮固定すると共に、最下位の防雪板３を水平状の吹抜け姿勢に仮固定することにより、風上側から吹き付ける吹雪を、塞き止めることなく効率的に風下側へ整流、誘導して高圧の風雪を道路面（防雪対象地上部）に吹き付けて、路面への着雪や積雪を阻止し、しかも走行車両の視界を確保できるものとなり、自動車専用道路等に最適な構造となる。
【００２７】
さらにまた、上側三昧の防雪板３，３，３を吹払い姿勢とし、最下位の防雪板３とその直上の、地上ＧＬから凡そ１〜２ｍの範囲に設置された合計二枚の防雪板３，３を、図１３中（矢印）に示すように、垂直状とした吹止め姿勢とすることにより、図１５中に示すように、歩道を歩く歩行者を暴風雪から保護すると共に、それより上側の吹払い姿勢の防雪板３，３，……が、道路上の積雪を吹き払い、走行する車両の視界を確保するものとすることができる。
【００２８】
そして、多数の小孔が穿孔された地上ＧＬ付近の二枚の防雪板３，３は、適度に強風を減衰して風下側へ逃がすので、破損や脱落を防止すると共に、暴風が発生した際にも吹止め姿勢をそのまま維持することができ、図１４中に示すように交差点の視界を確保するものとなり、地上ＧＬから３枚目となる防雪板３の回動取付け金具部４４，４４を、図９に示す鉛直姿勢に取り付けて、同防雪板３を水平状の吹抜け姿勢に取り付けたものとすることにより、歩道上に廂形状部を形成することが可能であり、それよりも上側の吹払い姿勢に仮固定された防雪板３，３に誘導された風雪が、歩道側へ巻き込み状となることを防ぐものとすることができる。
【００２９】
【効果】
以上のとおり、この発明の防雪柵によれば、設置された場所の吹雪の発生条件や、歩行者の有無、あるいは平野や山間部等の各種地理的条件に応じて防雪板の姿勢を設定、変更することが可能であり、上下複数枚の防雪板を垂直状として吹雪を吹き止めし、あるいは下端を風下側に傾斜させて吹き払い機能をもたせることにより、道路等の防雪対象地上部への吹き溜まりや積雪の発生を防止することができるのは勿論のこと、歩道近傍に設置された場合には、地上１〜２ｍ前後の所定範囲までに属することとなる一枚またはそれ以上の防雪板を垂直状の吹止め姿勢とすることにより、歩行者や路側を走る自転車等を強風から保護することができ、また、自動車専用道路のように歩行者の無い道路に設置する際には、略水平状の吹抜け姿勢に仮固定するか、あるいは防雪板下端を風下側に傾斜させた吹払い姿勢に固定して、車道への吹き溜まりや積雪をさらに効果的に防止することができ、しかも、設置完了後、自然環境の変化や予測し得なかった地理的条件等により、構造の変更が求められた場合にも、防雪板の取り付け姿勢を吹止め姿勢、吹抜け姿勢あるいは吹払い姿勢の中、設定可能な何れか所望する姿勢に容易に変更し、仮固定することができるという秀れた特徴が得られるものである。
【００３０】
特に、実施例に説明した防雪柵１は、上記した特徴に加え、図４中に示すように、地上１〜２ｍの高さ範囲に位置する防雪板３，３に多数の小孔を穿孔してあって、吹止め姿勢とした防雪板３，３の表裏面間の空気圧力差を軽減し、防雪板３上端部付近での風速の上昇を抑えて歩行者頭上付近に過剰な強風や渦流が発生してしまうことを防止できるという利点が得られるものとなる。
【００３１】
また、図７および図８中に示したもののように、上側四段分の開閉角度調節機構４，４，……は、支柱２に形成されたフランジ部４１の表裏面に、合計ニ個の回動取付け金具部４４，４４を装着する際、ボルト・ナット４８，４８によって共締めすることができることから、防雪板３，３，……の脱着や取付け姿勢の変更作業を簡便且つ迅速に行うことができ、さらに、下部支柱２４から上部支柱２５を分離可能な構造とし、下部支柱２４のフランジ部４１には、垂直姿勢とした五枚の防雪板３，３，……を積層状とした状態に横架可能な、複数の嵌合部４２，４２，……を設けてなる開閉角度調節機構４を設けてあって、最下位の防雪板３を吹止め姿勢あるいは吹抜け姿勢の何れかに姿勢変更し、仮固定することができる上、冬期以外の期間には、五枚の防雪板３，３，……を下部支柱２４，２４間に横架状に収納することができるという効果を発揮する。
【００３２】
叙述の如く、この発明の防雪柵は、その新規な構成によって所期の目的を遍く達成可能とするものであり、しかも製造も容易で、従前からの各種条件に応じて多様な形式の中から選択しなければならなかった防雪柵に比較し、部品点数を抑えて規格化したものとして各種状況に対応可能となって遥かに経済的なものとすることができる上、設置作業や保守、整備作業の効率自体も大幅に高めることができることから、費用の削減と工期の短縮とを確実に達成可能にするものであり、道路設備の維持、管理作業の合理化および交通安全の向上は勿論のこと、特に歩行者の安全確保についても十分な対策が求められている道路建設業界において高く評価され、広範に渡って利用、普及していくものになると予想される。
【図面の簡単な説明】
図面は、この発明の防雪柵の技術的思想を具現化した代表的な実施例を示すものである。
【図１】防雪柵の構造を示す正面図である。
【図２】防雪柵の構造を示す側面図である。
【図３】防雪板の構造を示す斜視図である。
【図４】地上付近の防雪板を示す斜視図である。
【図５】開閉角度調節機構を示す斜視図である。
【図６】分解された開閉角度調節機構を示す斜視図である。
【図７】共締めによる開閉角度調節機構の取付け構造を示す斜視図である。
【図８】共締めによる開閉角度調節機構の取付け構造を示す断面図である。
【図９】開閉角度調節機構を示す正面図である。
【図１０】開閉角度調節機構の取付け角度の変更を示す正面図である。
【図１１】防雪板の姿勢変更作業を示す側面図である。
【図１２】全ての防雪板を吹止め姿勢とした防雪柵を示す側面図である。
【図１３】地上付近の防雪板を吹止め姿勢とした防雪柵を示す側面図である。
【図１４】防雪柵の利用状態を示す正面図である。
【図１５】防雪柵の利用状態を示す側面図である。
【符号の説明】
１　　　防雪柵
２　　　支柱
２１　　同　基礎ブロック
２２　　同　基礎杭
２３　　同　アンカーボルト
２４　　同　下部支柱
２５　　同　上部支柱
２６　　同　風上側の棒状枠部
２７　　同　風下側の棒状枠部
２８　　同　下部（上部）ベースプレート
２９　　同　連結パイプ
３　　　防雪板
３１　　同　補強枠
３２　　同　支持軸部
４　　　開閉角度調節機構
４１　　同　フランジ部
４２　　同　嵌合部
４３　　同　仮固定ピン
４４　　同　回動取付け金具部
４５　　同　円盤部
４６　　同　回動取付け金具部の貫通孔
４７　　同　フランジ部の貫通孔
４８　　同　ボルト・ナット
ＧＬ　　　地上面[0001]
[Object of the invention]
The present invention relates to a snow protection facility that is installed on the windward side of a road, a parking lot, or another snow protection target ground part, and that can prevent snow accumulation, snow accumulation, whiteout phenomenon, and the like on the snow protection target ground part due to snowstorm. In particular, it is an object of the present invention to provide a snow fence having a novel structure capable of preventing a strong wind, a blowing of snow, or the like from being applied to a pedestrian who moves on a sidewalk.
[0002]
[Prior art]
When the temperature is below freezing and immediately after snowfall, it can be seen in strong winds, and powdery fresh snow is blown off by the blowing of strong winds, and powdered snow soars up to a range of 1 to 2 m from the surface of the ground to become extremely dense fog. A snowstorm that completely obstructs the snow, and if it is accompanied by snowfall, the snow particles that have fallen are also added, and the situation is the worst, causing traffic obstacles due to snowdrifts and poor visibility on the road, Not only is it frequent, but it is not uncommon for roadblocks to cause significant damage to industrial activity, or even cause gas poisoning or icing in a trapped vehicle.
[0003]
Various types of snow fences have been developed and put into practical use as means to prevent snow accumulation on the road and decrease in visibility due to snowstorms, secure good traffic, and reduce snow removal work. There is a so-called blow-off type snow fence that collects wind and blows it to the road surface, and blows off the snow that accumulates on the road surface. A wind receiving plate (also known as a rectifying plate, a snow plate, etc.) that collects wind For example, the straightening plate disclosed in Japanese Patent Application Laid-Open No. 10-292319 has a curved shape to enhance the rectifying effect, improve the wind speed, and efficiently wipe snow on the road surface. There is a large number of inventions, including the "wiping snow fence" invention which can be disassembled and stored for maintaining the landscape when it is not needed (period other than the snowfall season). -62614 As in the invention described above, during an unnecessary period other than winter, the snow fence device is configured so that it can be stored so as to be substantially flush with the road surface along the slope beside the road so as not to obstruct vehicle traffic. As mentioned in the proposal of the registered utility model No. 3061355 "Snow fences with lower obstruction blowing away", the snow fences of the conventional full blow-off structure were improved, and only the upper part was Although it is a snow-proof fence, the lower part is a wall-shaped blocking plate that rises almost vertically from the ground, and there are some places where the area near the ground near the snow fence is protected from strong winds.
[0004]
However, these conventional blow-off snow fences do not have a straightening plate or a snow shield in a range of about 1 to 1.2 m above the ground, which is below the visibility of a passing vehicle, and form a lower gap to form the lower gap. It is formed so as to form a substantially gate-shaped structure in which a plurality of upper and lower snow protection boards are respectively laid horizontally on the upper side of the building, and when installed on a school road having a sidewalk or a living road, 1 to 1 above the ground .2m Strong winds wipe through the area, and relatively small elementary school students and elderly people walking on the frozen or snowy sidewalk are swept by strong winds, and beside the roadway where cars and large trucks run frequently. Nevertheless, there was concern that it would not be possible to secure safe traffic.
[0005]
As described above, in order to dispel such concerns, as described above, in the invention of the “lower obstruction blow-off snow fence” disclosed in Utility Model Registration No. 3061355, which is an improvement of the conventional blow-off snow fence, the lower gap is certainly removed. It is closed by a flat lower blocking plate, and is designed to protect pedestrians from strong winds and snowstorms, but this way the lower gap is completely closed. Then, the gap under the snow fence, which is a place where there is no baffle (which is not necessary for blowing off snow on the road surface), is simply closed with a windbreak board unrelated to the baffle. If this is the case, it is an improvement technology that only covers the empty space with a board, and the difference in wind conditions and terrain in the area where the snow fence is installed, or the difference in the use of the road surface near the snow fence Etc., depending on It is impossible to change the installation structure of the obstruction plate to the optimum state and make it compatible, so not only there is a problem in practical use, but also in the on-site construction, the work content differs and the work efficiency However, there is a disadvantage that the number of parts is increased and the total number of parts is increased.
[0006]
According to the present invention, when a snowstorm occurs as described above, the snow fence that blows off the snow on the road, secures the visibility and enables the safe passage of the vehicle, has a sidewalk or the like, The shape and opening of the lower gap cannot be changed according to the conditions of occurrence, changes in the topography of flat terrain or mountainous areas, etc., and considering various geographical conditions, snow fences of various structures are considered. From the inside, the one that is most suitable for the installation location must be selected, which requires a great deal of time and effort, and it is difficult to review and change the structure once the selection is wrong. From the judgment that even if the same structure, it is not possible to change the settings of blow stop, blow-off, blow-by, etc. at any time according to the geographical conditions and the presence or absence of pedestrians, The development and research are started very quickly, and trial and error and many As a result of repeated trial production and experiments, this time, we finally succeeded in realizing a snow fence with a new structure, and the configuration is described below in detail with an embodiment representative of the present invention shown in the drawings. It will be described.
[0007]
Configuration of the Invention
As can be clearly understood from the exemplary embodiment shown in the drawings, the snow fence included in the present invention basically has the following configuration.
That is, a plurality of upper and lower snow protection plates are set in a horizontal configuration between adjacent columns of a plurality of columns that are vertically erected at predetermined intervals along the windward side of a snow protection target such as a road. And one or more snow protection plates belonging to at least a predetermined range of about 1 to 2 m from the ground, and the struts located at both ends of the set of snow protection plates. In between, the snow stoppers are in a substantially vertical shape, the blowing edge is a substantially vertical shape, the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 °, and the blowing edge is a semi-opening shape, and a substantially horizontal shape. The snow fence has a configuration in which an opening / closing angle adjustment mechanism that can be selectively changed as appropriate to all of the three states, that is, a fully opened state, and that can be temporarily fixed is provided.
[0008]
In the snow fence having this basic configuration, a plurality of upper and lower sheets are provided between adjacent columns of a plurality of columns which are vertically arranged at predetermined intervals along a windward side of a snow protection target such as a road. One set of snow-prevention boards shall be arranged horizontally, and one or more snow-prevention boards belonging to at least a predetermined range of about 1 to 2 m from the ground shall be included in the set of snow-prevention boards. Between each of the pillars located at both ends thereof, each snow-prevention plate is in a substantially vertical shape, and the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 ° to be semi-open. And all three positions, that is, a blow-out position that is fully open as a substantially horizontal shape, or any one of the three positions, excluding the blow-off position, can be selectively changed as appropriate. Includes a snow fence with an adjustable opening and closing angle adjustment mechanism .
[0009]
More specifically, the snow fence having the above-described configuration is provided with a plurality of vertical pillars vertically adjacent to each other at a predetermined interval along the windward side of a snow-protected target ground portion such as a road. One set of snow-prevention boards shall be arranged horizontally, and one or more snow-prevention boards that belong to at least a predetermined range of about 1 to 2 m from the ground shall be arranged in the set of snow-prevention boards. The snow-prevention plates are set in such a manner that the vertical distance between them is regulated so that a predetermined range can be substantially formed as a single plate-shaped blow stop wall when all or a part thereof is in a vertical posture. In addition, between each of the snow-prevention plates and each of the struts located at both ends thereof, the wind-stopping posture in which the snow-prevention plates are substantially vertical, and the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 °. With a blow-off position that is semi-open, The snow fence has a configuration that includes an opening and closing angle adjustment mechanism that can be selectively changed to any of the three states, or any of the three states, excluding the blowing-out posture, and temporarily fixed. be able to.
[0010]
The strut has a function of supporting both ends of a set of upper and lower snow protection plates with sufficient strength to withstand strong wind and snow at each desired height position of each snow protection plate. Shall be installed in a substantially vertical manner with an interval capable of supporting the snow protection plate in a horizontal manner, and a plurality of the snow shields shall be installed so as to stand in a substantially linear manner at the same interval. And a set of open / close angle adjusting mechanisms that can adjust the open / close angle of the snow plate between each end of each snow plate. It is also possible to use a single column or each of which is formed by combining a plurality of rods into a skeleton frame-type column. Folding mechanism that can be folded and miniaturized during the period , It can be made incorporating the degradation mechanism or the like to be able to remove by decomposition.
[0011]
The snow plate is supported in a substantially vertical position, thereby blocking wind and wind blowing from the windward to prevent the blowing of wind and snow on a snow-protected target surface portion such as a road. The wind blown from above will pass through as it is, and furthermore, by making the lower edge be inclined to the leeward side at a desired angle, the wind and snow blown from the windward will be forcibly directed toward the top surface of the snow protection target ground such as roads. Guidance, blowing, and blowing off the snow that tends to accumulate on the surface of the snow-protected area, and selectively fulfilling the functions corresponding to the three conditions of preventing the snow, such as wind pressure due to wind and snow and load due to snow accretion It must have a material and structure that has sufficient strength to withstand freezing, etc., and if necessary, ensure ventilation by perforating a mesh or a large number of small holes, etc. It is also possible to use a material to be used, among the upper and lower plural sheets, a plurality of snow panels within a predetermined range, the attachment portion to each end support, the vertical interval is approximately equal to the vertical width of the snow panel The size may be restricted to a size corresponding to approximately half of the size.
[0012]
Therefore, when a plurality of upper and lower snow protection plates are in a substantially vertical posture, the structure is a blow-stop wall shape that is partially overlapped with each other within a predetermined upper and lower range, or a continuous end portion is substantially aligned. It is possible to have a structure that is continuous in a shape. It is also possible to form a blow stop wall. Furthermore, it is possible to make the top snow cover horizontal so as to prevent the wind blown off from the sloping snow cover outside the predetermined range from hitting the person, so that all snow protection can be achieved. The plate can be configured to be adjustable in angle.
[0013]
The opening / closing angle adjustment mechanism performs a function of appropriately changing each supporting position of each snow-prevention plate between the columns as necessary and temporarily fixing the same, and a blow stopper in which the snow-prevention plate is substantially vertical. All the three postures: a blow-off position in which the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 ° to make it semi-open, and a blow-out position in which it is almost horizontal and fully open. , Or one of them must be capable of being selectively changed and temporarily fixed to a posture in two states excluding the blowing-off posture.
[0014]
In addition, a plurality of upper and lower snow plates between adjacent columns are provided as a set, and only a top one of the snow plates within a predetermined range is appropriately positioned in all three states. An opening / closing angle adjustment mechanism that can be selectively changed and temporarily fixed is provided, and other snowproof plates are selectively changed to the two-state posture except for the blow-by posture and can be temporarily fixed. Or, a plurality of snow panels within a predetermined range of upper and lower sides have an opening / closing angle adjustment mechanism incorporated in a portion to be attached to each end support, and each of the opening / closing angle adjustment mechanisms is adapted to turn the snow protection plate at an appropriate position in the middle of the support. The horizontal cross-section is approximately the same as the flange part which is fixed and integrated so as to cross the driving axis substantially perpendicularly, and the square pillar type support shaft part which is provided almost concentrically at the center of the left and right edges of the snowproof plate. U-shaped, support shaft can be connected non-rotatably at every 90 ° angular position The flange portion has a substantially U-shaped cross-section opening facing vertically upward, or is inclined upward at an angle of about 30 ° to 45 ° in the windward direction. It can be formed in any of the postures by using a rotation mounting bracket portion which can be temporarily temporarily fixed by using a bolt and a nut.
[0015]
In addition, the opening and closing angle adjustment mechanism is the only one of the lowermost opening and closing angle adjustment mechanism that supports the snow protection plate located at the lowest position in the snow protection plate made up of a plurality of upper and lower sheets between adjacent columns, On the other hand, a square pillar-shaped support shaft portion, which is fixed and integrated so that the flange portion crosses the rotation axis of the snow protection plate substantially perpendicularly and is substantially concentrically protruded at the center of the left and right edges of the snow protection plate. , A plurality of fitting portions each having a substantially U-shaped horizontal cross-section so as to be non-rotatably connectable at each angular position of 90 ° units are removed from a position above the fitting portions, and a vertical posture is obtained. Each of the plurality of snow-prevention plates is arranged such that the openings of the substantially U-shaped cross-sections are directed vertically upward so as to be able to be held in a stacked state, so that they are substantially horizontally connected from the windward side to the leeward side of the flange portion. It can be formed. Hereinafter, the structure of the present invention will be described in detail together with the embodiment shown in the drawings.
[0016]
【Example】
1 is a front view of the snow fence of FIG. 1, a side view of the snow fence of FIG. 2, a perspective view of a part of the snow plate disposed at the top of FIG. 3, a perspective view of a part of the snow plate disposed at the bottom of FIG. A perspective view of the opening / closing angle adjusting mechanism of FIG. 5, a perspective view of the disassembled opening / closing angle adjusting mechanism of FIG. 6, a perspective view of the opening / closing angle adjusting mechanism provided with the support of FIG. 7, and a support of FIG. In the example shown in the cross-sectional view of the provided opening / closing angle adjustment mechanism, a pair of upper and lower snow protection boards are horizontally arranged from the vicinity of the ground surface to the vicinity of the upper end between a pair of pillars. The angle of each snowboard can be changed as appropriate between each end of each of the snowboards belonging to a predetermined range of about 1 to 2 m and the other snowboards located above the snowboards, and the columns. A typical example of a snow fence included in the present invention, which has a basic configuration having an opening / closing angle adjusting mechanism It illustrates an embodiment.
[0017]
The snow fence 1 is installed along the windward side of a road having a sidewalk (the above-ground part to be snow-proofed). The snow fence 1 is shown in FIGS. 2, a foundation block 21 buried in the ground and a foundation pile 22 penetrating substantially the center of the foundation block 21 and firmly fixed in the ground are provided. On the side, pillars 2 and 2 composed of a lower pillar 24 and an upper pillar 25 connected to the upper part of the lower pillar 24 via anchor bolts 23 are securely supported in an upright manner.
[0018]
The lower support 24 is set to have a height slightly longer than the width of the snow plate 3 to be described later, and is set to the same length as the bar-shaped frame 26 erected on the windward side. A bar-shaped frame 27 is erected and arranged in parallel on the leeward side at an interval. One lower base plate 28 is provided at the lower end of each bar-shaped frame 26, 27, and one bar is also provided at the upper end. The upper base plate 28 is horizontally connected to each other, and the lower base plate 28 is connected to the foundation block 21 and the foundation pile 22 via anchor bolts 23. A flange portion 41 forming a part of the opening / closing angle adjusting mechanism 4 is integrated in a bridging shape at the position.
[0019]
The upper support 25 has a bar-shaped frame 26 on the windward side having a height slightly longer than the width of four snowproof plates 3 and a leeward side at a predetermined distance from the bar-shaped frame 26. A skeletal frame having a bar-shaped frame portion 27 set in dimensions and arranged in parallel, wherein the upper end of the bar-shaped frame portion 27 is bent toward the windward side and joined to the upper end of the bar-shaped frame portion 26. The connecting pipe 29 is formed between the upper ends of the upper left and right supports 25, 25 to form a portal structure. Flanges 41, 41,... Forming a part of the opening / closing angle adjusting mechanism 4 are integrated in a bridging manner at four locations at predetermined vertical intervals between the bar-shaped frame portions 26, 27 on the leeward side. The front and rear bar-shaped frame portions 26 and 27 are integrally connected.
[0020]
The snow protection plate 3 has a substantially rectangular shape set to have a predetermined length and a horizontal width between a pair of columns 2 and 2 adjacent to each other with a predetermined space therebetween. As shown in the figure, the reinforcing frames 31, 31 are connected to the left and right ends, respectively, and the opening and closing angle adjusting mechanism 4 is provided substantially at the center of each of the reinforcing frames 31. The support shafts 32, 32 each having a substantially prismatic shape are formed horizontally and concentrically. Further, as shown in FIG. 4, a large number of small holes are perforated in two of the snow plates 3, 3,... Arranged on the lower side, as shown in FIG.
[0021]
An opening / closing angle adjusting mechanism 4 is provided between each snow plate 3 and the column 2, and the left and right opening angles provided between the lower columns 24, 24 and the snow plate 3, respectively. As shown in the side views of the snow fence in FIGS. 2 and 12, the adjustment mechanism 4 has a symmetrical shape with respect to each other, and fits the prismatic cross-sectional shape of the support shaft portion 32 to the side surface of the flange portion 41 from above. , Which are formed in a substantially U-shape, are provided between the upwind-side bar-shaped frame portion 26 and the leeward-side bar-shaped frame portion 27. The snow protection plate 3 is arranged horizontally, and the interval between them is set slightly larger than the thickness of the snow protection plate 3. The structure can be temporarily fixed so that the angle can be adjusted for each unit. The four snow protection plates 3, 3,... To be placed can be horizontally laid and stored in a vertical posture between the bar-shaped frame portion 26 on the windward side and the bar-shaped frame portion 27 on the leeward side. It has a structure.
[0022]
Each of the support shafts 32, 32 of the snow protection plate 3 is provided with a fixing hole that penetrates the square cross section in a cross shape, and a corresponding bottom portion of the substantially U-shaped cross section of the fitting portions 42, 42. A similar fixing hole is also drilled, and these fixing holes are arranged concentrically and a temporary fixing pin (not shown) having a retaining structure is attached and temporarily fixed so that it cannot be removed. The open / close angle adjusting mechanisms 4 and 4 for the snow plate 3 suspended between the lower supports 24 and 24 are used to arbitrarily select one of a vertical blow stop posture and a horizontal blow through posture. Can be temporarily fixed.
[0023]
Further, the respective structures between the upper supports 25, 25 and the four snow plates 3, 3,... Accommodate the plurality of snow plates 3 as described above by changing the structure. There is provided an opening / closing angle adjusting mechanism 4 capable of supporting the snow-proof plate 3 in an inclined posture without having the same, and its structure is symmetrical to the left and right with the snow-proof plate 3 interposed therebetween. As shown in FIGS. 5 and 6, the flange 41 is disposed and formed so as to vertically intersect with the rotation axis of the snow shield 3, and the flange 41 is provided between the flange 41 and the support shaft 32. A rotary mounting bracket unit formed by integrating a disk unit 45 to be joined and a fitting unit 42 having a U-shaped horizontal cross section and capable of connecting the support shaft unit so that the support shaft unit cannot rotate at every 90 ° angle posture. The fitting 44 is mounted on the rotating mounting bracket 44 and the disc 45 is separated by 180 ° with the fitting 42 interposed therebetween. At a position, a pair of temporary fixing through holes 46, 46 are drilled in the thickness direction, and the U-shaped opening of the fitting part 42 can also be temporarily fixed to the corresponding flange part 41 in a vertically upward direction. The through holes 47 are drilled, and the U-shaped opening of the fitting portion 42 is inclined at an angle of about 30 ° to 45 ° in the windward direction (the side of the bar-shaped frame portion 26 on the windward side) to face upward. The through holes 47, 47, which are temporarily fixed and enabled, are respectively formed, and the bolts and nuts 48 are used to move the snow-proof plate 3 in the horizontal posture, the vertical posture, or the lower end to the leeward side by 30 to 45 degrees.仮 It can be temporarily fixed to any of the postures tilted to the front and rear angles.
[0024]
Further, as shown in FIGS. 7 and 8, when three or more columns 2 are erected at predetermined intervals from each other, and when the snowproof plates 3 The two mounting brackets 44, 44 of the same structure are sandwiched by bolts and nuts 48, 48 so that they can be temporarily fixed together.
[0025]
[Action]
The snow fence of the present invention having the above-described configuration has a front view of the opening / closing angle adjusting mechanism in FIGS. 1 to 8 and 9, a front view of the opening / closing angle adjusting mechanism adjusted to the blowing-off posture in FIG. 10, and FIG. 11. Side view of the snow-prevention board whose angle is adjusted, the side view of the snow-prevention fence in which the angle of the snow-prevention board of FIG. 12 is adjusted to the blowing position, and the side view of the snow-prevention fence of FIG. As shown in the front view of the snow fence in the use state of FIG. 14 and the side view of the snow fence in the use state of FIG. 15, the column 2 erected along the windward side of the road (the above-ground part for snow protection). , 2,..., The left and right support shafts 32, 32 are set so that the lowermost snow shield 3 of the five snow shields 3, 3,. Attach to the corresponding fitting portions 42, 42, respectively, and temporarily fix them, and also, each rotation mounting that supports the upper four sheets outside As shown in FIG. 9, the mounting angles of the fitting portions 44, 44,... Are temporarily fixed so that the opening having the U-shaped cross section of the fitting portion 42 is directed vertically upward. , 3,... Are mounted in a vertical position, and all five snow protection plate support shaft portions 32, 32,... Are temporarily fixed to the fitted portions 42, 42,. By using ……, it is securely fixed so that it does not fall off, so that each of the snowproof plates 3, 3,… that have taken the blow-stop posture form a single wall with their vertical edges continuous. As shown in FIGS. 12 and 14, wind and snow are prevented from reaching the road including the sidewalk (the snow-absorbing target ground portion), and The structure is effective in an area where snow is likely to be strongly accumulated and snowfall is relatively small.
[0026]
Further, the rotatable mounting brackets 44, 44,... Supporting the upper four snowproof plates 3, 3,. It is inclined at an angle of about 30 ° to 45 ° toward the upper side (the side of the bar-shaped frame portion 26 on the windward side), and is temporarily fixed in an upward direction, and the respective snowproof plates 3, 3,. (On the leeward side of the bar-shaped frame portion 27 side) and attached using the temporary fixing pins 43, 43,..., And blow off the four upper snowproof plates 3, 3,. By temporarily fixing the lowermost snowproof plate 3 in a horizontal blow-through posture while temporarily fixing it to the attitude, the snowstorm blown from the windward side can be efficiently rectified and guided to the leeward side without blocking and high pressure. Blows snow on the road surface (the snow-covered ground) to prevent snow from accumulating on the road surface and snow accumulation, while also ensuring the visibility of the traveling vehicle. Next, the optimum structure in an automobile-only roads.
[0027]
Furthermore, the upper snow cover 3, 3, 3 is in a blowing-off attitude, and a total of two snow cover plates 3 installed immediately above the lowest snow cover 3 and within a range of about 1 to 2 m from the ground GL. , 3 are made to have a vertical blowing position as shown in FIG. 13 (arrows) to protect pedestrians walking on the sidewalk from stormy snow as shown in FIG. The snow-prevention plates 3, 3,... In the blowing-out position blow off the snow on the road and secure the visibility of the traveling vehicle.
[0028]
The two snow shields 3, 3 near the ground GL where a number of small holes are drilled moderately attenuate the strong wind and escape to the leeward side, so that damage and falling off are prevented, and when a storm occurs. In this case, the blow stop posture can be maintained as it is, and as shown in FIG. 14, the visibility of the intersection is secured, and the rotatable mounting brackets 44, 44 of the third snowproof plate 3 from the ground GL are attached. By attaching the snow plate 3 in the vertical posture shown in FIG. 9 and attaching it to the horizontal atrium posture, it is possible to form a loose-shaped portion on the sidewalk, It is possible to prevent the wind and snow induced by the snowproof plates 3 and 3 temporarily fixed in the blowing-off posture from becoming entangled in the sidewalk side.
[0029]
【effect】
As described above, according to the snow fence of the present invention, the position of the snow plate is set according to the conditions of occurrence of snowstorm at the place where it is installed, the presence or absence of pedestrians, or various geographical conditions such as plains and mountainous areas, It is possible to change the direction of the snow cover by setting the upper and lower snow plates vertically and stopping the snowstorm, or by inclining the lower end to the leeward side to provide a blow-off function. Of course, it is possible to prevent the occurrence of snowdrifts and snow cover, and if it is installed near the sidewalk, one or more snowboards that belong to a predetermined range of about 1 to 2 m above the ground By adopting the vertical wind stop posture, pedestrians and bicycles running on the roadside can be protected from strong winds.Also, when installed on roads without pedestrians such as motorways, they are almost horizontal. Provisional Or fix the snow protection plate at the wiping position with the lower end inclined to the leeward side to prevent snow accumulation and snow accumulation on the road more effectively. Even if a structural change is required due to unpredictable geographical conditions or the like, any of the desired postures that can be set among the blow posture, the blow-by posture, and the blow-off posture can be set as the mounting posture of the snow plate. It can be easily changed and temporarily fixed.
[0030]
In particular, the snow fence 1 described in the embodiment has, in addition to the above-described features, a large number of small holes formed in the snow plates 3 and 3 located in a height range of 1 to 2 m above the ground as shown in FIG. The air pressure difference between the front and back surfaces of the snow protection boards 3 and 3 in the wind-stop position is reduced, and the rise in wind speed near the upper end of the snow protection boards 3 is suppressed. Can be prevented from occurring.
[0031]
As shown in FIGS. 7 and 8, the opening and closing angle adjustment mechanisms 4, 4,... When the rotary mounting brackets 44 are mounted, they can be fastened together by the bolts and nuts 48, 48, so that the work of attaching and detaching the snowproof plates 3, 3,. , And the upper support 25 can be separated from the lower support 24, and five flanges 41, 3,... An opening / closing angle adjusting mechanism 4 including a plurality of fitting portions 42, 42,... That can be horizontally mounted in a state is provided, and the lowest snowproof plate 3 is placed in either a blow-stop position or a blow-through position. Posture can be changed and temporarily fixed, and during periods other than winter To exert an effect that can be accommodated in the laterally bridged form five sheets of snow plates 3, a ...... between the lower strut 24 and 24.
[0032]
As described above, the snow fence of the present invention can achieve the intended purpose uniformly by its novel structure, is easy to manufacture, and can be manufactured from various types in accordance with various conventional conditions. Compared to the snow fences that had to be selected, the number of parts was reduced and standardized, making it possible to respond to various situations and making it much more economical, and installation work, maintenance and maintenance Since the work efficiency itself can be greatly increased, it is possible to reliably reduce costs and shorten the construction period, as well as to maintain road facilities, streamline management work and improve traffic safety. In particular, it is highly evaluated in the road construction industry, where sufficient measures are required to ensure the safety of pedestrians, and is expected to be widely used and spread.
[Brief description of the drawings]
The drawings show a typical embodiment embodying the technical concept of the snow fence of the present invention.
FIG. 1 is a front view showing the structure of a snow fence.
FIG. 2 is a side view showing the structure of a snow fence.
FIG. 3 is a perspective view showing a structure of a snowproof plate.
FIG. 4 is a perspective view showing a snow plate near the ground.
FIG. 5 is a perspective view showing an opening / closing angle adjusting mechanism.
FIG. 6 is a perspective view showing a disassembled opening / closing angle adjusting mechanism.
FIG. 7 is a perspective view showing a mounting structure of an opening / closing angle adjusting mechanism by joint fastening.
FIG. 8 is a cross-sectional view showing a mounting structure of an opening / closing angle adjusting mechanism by joint fastening.
FIG. 9 is a front view showing an opening / closing angle adjusting mechanism.
FIG. 10 is a front view showing a change in a mounting angle of the opening / closing angle adjusting mechanism.
FIG. 11 is a side view showing the operation of changing the attitude of the snowproof board.
FIG. 12 is a side view showing a snow fence in which all the snow plates are in the blow-stop position.
FIG. 13 is a side view showing a snow fence in which a snow plate in the vicinity of the ground is in a blowing position.
FIG. 14 is a front view showing a use state of the snow fence.
FIG. 15 is a side view showing a use state of the snow fence.
[Explanation of symbols]
1 snow fence
2 props
21 Same basic block
22 Same foundation pile
23 Same anchor bolt
24 Same lower support
25 Same upper support
26 Same Wind-side bar-shaped frame
27 Same leeward bar-shaped frame
28 Same lower (upper) base plate
29 Same Connecting pipe
3 Snow plate
31 Same reinforcement frame
32 Same Support shaft
4 Opening and closing angle adjustment mechanism
41 Same flange
42 Same fitting part
43 Same as temporary fixing pin
44 Same rotation mounting bracket
45 Same disk
46 Same as the through hole of the rotation mounting bracket
47 Same as the flange hole
48 Same bolt / nut
GL Ground surface

Claims

A pair of upper and lower snow panels are arranged in a horizontal shape between adjacent columns of a plurality of columns that are vertically erected at predetermined intervals along the windward side of the snow protection target such as a road. And one or more of the snowboards belonging to at least a predetermined range of about 1 to 2 m from the ground, and each of the struts located at both ends thereof. Between them, the snow-prevention plate has a substantially vertical shape, a blow-off position in which the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 °, and a blow-out position in which it is semi-open, A snow fence comprising an opening / closing angle adjusting mechanism that can be selectively changed as appropriate in all three of the three different postures, and that can be temporarily fixed.

A pair of upper and lower snow panels are arranged in a horizontal shape between adjacent columns of a plurality of columns that are vertically erected at predetermined intervals along the windward side of the snow protection target such as a road. And one or more of the snowboards belonging to at least a predetermined range of about 1 to 2 m from the ground, and each of the struts located at both ends thereof. Between them, the snow-prevention plate has a substantially vertical shape, a blow-off position in which the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 °, and a blow-out position in which it is semi-open, An open / close angle adjustment mechanism that can be selectively changed and temporarily fixed to all of the three postures, or one of the three postures excluding the blow-off posture, as appropriate. A snow fence characterized by:

A pair of upper and lower snow panels are arranged in a horizontal shape between adjacent columns of a plurality of columns that are vertically erected at predetermined intervals along the windward side of the snow protection target such as a road. One or more of the snowboards, which belong to at least a predetermined range of about 1 to 2 m from the ground, in the set of snowboards, all or a part of the snowboards have a vertical posture. In order to make the predetermined range substantially a plate-like blow stop wall shape, the vertical interval between them is set to a regulated size, and each of the snowproof plates and each of the struts located at both ends thereof are set. In between, the snowproofing plate has a substantially vertical shape, a blowing edge in which the lower edge is inclined to the leeward side at an angle of about 30 ° to 45 °, and a semi-opening shape, and a substantially horizontal shape. All or all of the three positions of the stairwell position to be fully open Appropriately selectively change the orientation of the two-state except the attitude, snow fences, characterized in that shall become provided opening angle adjustment mechanism that allows the temporary fixing.

A pair of upper and lower snowboards between adjacent struts.A plurality of snowboards within a predetermined range, only the highest snowboard among them, can be selectively changed to the posture of all three states as appropriate. An opening / closing angle adjustment mechanism that can be temporarily fixed is additionally provided, and the other snowproof plates are selectively selectively changed to the two states except for the blow-by posture, and an opening / closing angle adjustment mechanism that is temporarily fixed is provided. The snow fence according to claim 1, wherein:

Opening / closing angle adjustment mechanisms are incorporated into the attachment parts to both ends of the pillars. The mechanism is fixed in the middle part of the support so as to cross the axis of rotation of the snow-proof plate almost perpendicularly, and a flange part integrated with it, and a quadrangular prism projecting concentrically at the center of the left and right edges of the snow-proof plate The support shaft portion of the mold has a fitting portion formed so that a horizontal cross section is substantially U-shaped, and the support shaft portion can be non-rotatably connected to the support shaft portion at every angle of 90 °. Using a bolt and nut to select either a posture in which the opening of the substantially U-shaped cross section is directed vertically upward or a posture in which the opening is inclined at an angle of about 30 ° to 45 ° in the windward direction and directed upward. 5. A rotary mounting bracket part which can be temporarily fixed to the base member. Snow fences of the mounting.

A pair of upper and lower snow plates between adjacent columns, one of which is a set of snow plates. Only the flange part is fixed and integrated so as to intersect approximately perpendicularly with the rotation axis of the snow shield, and is protruded substantially concentrically at the center of the left and right edges of the snow shield. A plurality of fitting portions each having a substantially U-shaped horizontal cross-section so that the square pillar-shaped support shaft portion can be non-rotatably connected at every 90 ° angle posture, From the windward side of the flange portion, with the openings of the substantially U-shaped cross sections facing vertically upward so that the plurality of snow plates in a vertical position can be held in a stacked state. The snow fence according to any one of claims 1 to 5, wherein the snow fence is formed so as to be substantially horizontally connected to the side.

A pair of upper and lower snowboards between adjacent columns is a set of snowplates.A plurality of snowplates within a predetermined range are attached to both ends of the pillars. The snow fence according to any one of claims 1 to 6, wherein the size of the snow fence is restricted to a size corresponding to approximately half of the size.