JP3822807B2 - Protective fence - Google Patents

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Publication number
JP3822807B2
JP3822807B2 JP2001226069A JP2001226069A JP3822807B2 JP 3822807 B2 JP3822807 B2 JP 3822807B2 JP 2001226069 A JP2001226069 A JP 2001226069A JP 2001226069 A JP2001226069 A JP 2001226069A JP 3822807 B2 JP3822807 B2 JP 3822807B2
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Japan
Prior art keywords
cable
connecting rod
pipe
struts
outer cylinder
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JP2003034912A (en
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細川  豊
正男 伊藤
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RAITEKU CO., LTD.
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RAITEKU CO., LTD.
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Description

【0001】
【発明の属する技術分野】
本発明は、山腹の斜面部等に構築し、積雪や落石等を受け止めて道路等への落下、流入するのを防止する防護柵に関する。
【0002】
【従来の技術】
従来から山腹の斜面部等に構築して落石や積雪等を受け止めて道路等への落下、流入を防止する防護柵が知られており、例えば、特開平7−197423号公報には、山腹の斜面部に間隔を置いて縦孔を穿孔し、この縦孔に建て込んだパイプ支柱を並設すると共に、これら各パイプ支柱に複数段のケーブルとともに金網を張設した落石等の防護柵が提案されている。
【0003】
この防護柵は、両端部に配置された端末パイプ支柱にケーブルを通すための複数のケーブル装着孔が間隔をおいて形成され、中間部に配置される中間パイプ支柱には前記ケーブル装着孔と対応してケーブルを固定するためのボルトが形成されている。そして、ケーブル装着孔に緊張機能を備えた末端金具を装着し、この末端金具にケーブルの両端を連結した後、各中間パイプ支柱に形成するボルトに固定プレートをナット止めし、この固定プレートによって各中間パイプ支柱に架け渡したケーブルを固定すると共に、各パイプ支柱に金網を固定している。
【0004】
このような防護柵は、落石や積雪等を各パイプ支柱に張り巡らした金網と、これを支持するケーブルで受け止めるものであるが、金網を支えるパイプ支柱が複数のケーブルで連結されているだけなので、複数のパイプ支柱相互の連結強度が弱く、一部の中間パイプに落石や積雪等などの衝撃が加わると、その中間パイプが損壊する虞れがある。さらに、各中間パイプ支柱に架設したケーブルについても、その固定部分が中間パイプ支柱のみであるから、一部のケーブルに強い衝撃を加わった場合、そのケーブルに強い引張力が作用して切断する虞れもあるから、金網及びケーブルの張設耐力が弱いという課題を有している。また、パイプ支柱に張設したケーブルや金網は部分的に損傷した場合でも張設耐力が著しく低下するが、前記従来の防護柵は、ケーブル及び金網が防護柵の全長に渡って連続することから、ケーブル及び金網を部分的に交換することができず、メンテナンス作業が面倒であると共に、コスト的にも不経済であった。
【0005】
また、上記特開平7−197423号公報の図6には、支柱間の中央に間隔保持部材を配置し、この間隔保持部材により複数段のケーブルを連結している。しかし、その間隔保持部材は、結線などによりケーブルに連結され、単に上下段のケーブルの間隔を保持する機能しか発揮しないものである。さらに、間隔保持部材自体の荷重がケーブルに加わるため、金網以外にその間隔保持部材の荷重が負荷としてケーブルの途中に加わった状態となる。
【0006】
本発明は、連結杆により支柱を一体化して強度的に優れた防護柵を提供することを目的とし、また、複数の索状体を一体化して衝撃吸収効果に優れた防護柵を提供することを目的とする。
【0007】
【課題を解決するための手段】
請求項1の発明は、間隔を置いて支柱を立設し、これら支柱の間に上下に間隔をおいて索状体を架設すると共に防護用網体を張設した防護柵において、前記各支柱の上部に、鋼管から形成された連結杆を配置し、この連結杆の端部を前記支柱に前後方向回動可能で且つ上下方向回動可能に連結する回動連結機構を備えるものである。
【0008】
この請求項1の構成によれば、構築した防護柵によって積雪や落石等を効果的に受け止めことで、雪崩や落石といった自然災害が抑制される。また、各支柱の上部を、鋼管から形成された連結杆で連結することによって、各支柱の連結強度を高めることができると共に、各支柱に対して連結杆が前後方向及び上下方向に回動可能に連結されているので、各支柱と連結杆の連結部分で防護壁に加わる落石あるいは雪崩など加わる衝撃を吸収して支柱の損壊を抑制することができる。
【0009】
また、請求項2の発明の防護柵は、前記連結杆が内部に充填材を充填した充填鋼管であり、前記回動連結機構は、前記連結杆の端部を挿入連結する連結外筒部を有するものである。
【0010】
この請求項2の構成によれば、連結杆に充填鋼管を用いることにより、優れた変形性能が得られ、衝撃吸収能力が向上する。また、回動連結機構は連結外筒部を有するから、この連結外筒部を支柱に回動可能に連結し、この連結外筒部に連結杆の端部を挿入して連結したり、連結外筒部に連結杆の端部を挿入配置してから連結外筒部を支柱に連結すればよく、支柱への連結杆の連結作業を容易に行うことができる。
【0011】
また、請求項の発明は、前記支柱間に縦方向の連結部材を複数設け、これら連結部材を前記上下の索状体に連結し、前記連結部材を接地したものである。
【0012】
この請求項の構成によれば、複数段の索状体を連結部材により連結することにより、索状体を一体化して落石の衝撃エネルギーを複数の索状体に分散し、衝撃吸収効果が高まる。また、連結部材は接地しているから、該連結部材の荷重が索状体に加わることがない。
【0013】
また、請求項の発明は、前記索状体を複数の締め具により前記連結部材に締め付け固定したものである。
【0014】
この請求項の構成によれば、複数の締め具により索状体を締め付けて連結部材に固定することにより、索状体長さ方向における連結部材の移動を制御し、落石の衝撃エネルギーを適性に分散し、衝撃吸収効果を高めることができる。
【0015】
【発明の実施形態】
以下、本発明の防護柵の実施例について図1〜図11を参照して説明する。防護柵1は、両側に配置する端末パイプ支柱2の間に複数の中間パイプ支柱3を間隔をおいて並設し、これらパイプ支柱2,3に上下に間隔おいて索状体としてのケーブル4を多段に架設すると共に、防護用網体として金属線材で編成した金網5を張設し、例えば、山腹の斜面部にコンクリート基礎7を設け、このコンクリート基礎7に構築して積雪や落石等を受け止めものである。
【0016】
前記端末パイプ支柱2と中間パイプ支柱3は、コンクリートなどの基礎7に建て込まれる。こうして建て込んだ端末パイプ支柱2と中間パイプ支柱3は、連結杆6によって相互に連結される。これら端末パイプ支柱2と中間パイプ支柱3及び連結杆6は、断面形状が円形の鋼管によって形成されている。このような中空構造の端末パイプ支柱2と中間パイプ支柱3は、内設する補強体8によって補強される。なお、図1に示すように、補強体8は端末パイプ支柱2と中間パイプ支柱3より短く形成され、地中に埋設される部分にほぼ対応して端末パイプ支柱2と中間パイプ支柱3の下部に嵌挿されている。この補強体8は多角形状に形成され、本実施例においては三枚の補強プレート9から成る断面三角形に形成され、その各頂点を端末パイプ支柱2と中間パイプ支柱3の内周面にスポット溶接などによって一体化し、さらに、それら端末パイプ支柱2と中間パイプ支柱3の内周面にスポット溶接により複数の鉄筋10を設けている。尚、これら鉄筋10は前記補強体8とほぼ同一長さに設けられている。そして、前記断面三角形の補強プレート9の2つの頂点及び前記鉄筋10を、前記パイプ支柱2,3に引張領域側に設けている。さらに、端末パイプ支柱2と中間パイプ支柱3及び連結杆6は内部に充填材としてコンクリートやモルタル11を充填することによって中実構造としている。
【0017】
本発明では、前記連結杆6は断面円形をなし、その連結杆6の端部を端末パイプ支柱2及び中間パイプ支柱3に回動連結機構14により前後方向及び上下方向回動可能に連結している。この回動連結機構14は、端末パイプ支柱2と中間パイプ支柱3の外周上端部に、前記連結杆6を取り付けるための上下一対の取付プレート15,15を固定し、この取付プレート15,15の間に、ボルトなどからなる縦方向の枢軸16を配置すると共に、この枢軸16に、U字状に折曲した受プレート17を回動可能に配置する。一方、前記連結杆6の端部を挿入連結する連結外筒部18を形成し、この連結外筒部18に一側を閉塞端部19により閉塞し、この閉塞端部19に連結片20を設け、この連結片20が前記受プレート17の間に挟持配置された状態でボルトなどからなる横方向の枢軸21により回動可能に連結される。したがって、連結外筒部18は、枢軸16を中心に上下方向に回動し、枢軸21を中心に前後方向に回動可能になっている。尚、この例の連結外筒部18は断面円形の筒体である。
【0018】
前記連結外筒部18の他側は挿入用開口部18Aとなっており、この挿入用開口部から前記連結杆6の端部が挿入される。その連結外筒部18には、仮止め用ネジ22を螺合する雌螺子部22Aが円周方向等間隔に設けられ、さらに、閉塞端部19側には上側に充填材注入孔23がされている。そして、図4などに示すように、挿入状態で連結杆6の端部6Aと閉塞端部19との間には隙間があり、この隙間により支柱2,2,3間の間隔に連結杆6を合わせて調整することができる。そして、連結杆6の端部6Aを連結外筒部18に挿入すると共に、仮止め用ネジ22の先端を連結杆6に圧接して仮止めし、枢軸16,21を連結して連結杆6の両側を支柱2,3又は支柱3、3に連結すると共に、仮止め用ネジ22を緩めて支柱2,3又は3,3間の寸法に合わせ連結外筒部18における連結杆6の端部の長さ方向位置を調整した後、すなわち枢軸16,21などに力が加わらない位置に連結杆6に端部6Aの連結外筒部18内の位置を調整し、仮止め用ネジ22を締め、前記挿入用開口部18Aと連結杆6との間に防水加工部24により塞ぎ、前記モルタル注入孔23から充填材たるモルタル25を充填し、連結外筒部18に挿入した連結杆6の端部を連結する。
【0019】
尚、図7及び図8に示すように、中間パイプ支柱3においては、前側に上下一対の取付プレート15,15が設けられ、この取付プレート15の左右に前記枢軸16,16がそれぞれ配置されている。
【0020】
さらに、端末パイプ支柱2と中間パイプ支柱3の外周には、前記連結杆6を取り付けるための取付プレート15の他にもケーブル4を取り付けるためケーブル取付手段が設けられ、この取付手段の取付プレート31が、ケーブル4の本数に対応して固定されている。この取付プレート31は、前記取付プレート15と平行で端末パイプ支柱2に対して水平方向に突設されている。これら連結杆6用の取付プレート15とケーブル4用の取付プレート31は形状的に同一であるが、ケーブル4用の取付プレート31にはケーブル4の末端金具32を取り付けるための孔33が形成される。また、防護柵1の両端部に配置される端末パイプ支柱2に固定される各取付プレート15,31と、この端末パイプ支柱2の間に配置される中間パイプ支柱3に固定される各取付プレート15,31とは形状的に若干異なる。すなわち、中間パイプ支柱3に固定される各取付プレート15,31は、左右に隣接する端末パイプ支柱2あるいは中間パイプ支柱3と連結する必要があるので、図7に示すように、両側に左右一対の孔33を有して全体として矩形状に形成され、一方、端末パイプ支柱2に固定される各取付プレート15,31は、その内側に隣接して配置される中間パイプ支柱3にのみ連結すればよいため、図4に示すように、一つの孔33を有して全体として三角状に形成されている。
【0021】
前記末端金具32はU字状のジョイント金具34と、このジョイント金具34にナット35によって固定されるプレート36とで構成され、プレート36には前記ジョイント金具34の基部に形成するねじ部34Aを挿通する一対の孔37と、この各孔37,37の間に位置して前記ケーブル4を通す挿通孔38が形成されている。この挿通孔38は前記ケーブル4の末端に固着されるストッパ39より径小に形成されており、該ストッパ39を抜け止めするようにしている。
【0022】
また、前記支柱2,3間及び支柱3,3間には、ケーブル4に加わる衝撃エネルギーを分散する分散維持装置41が複数設けられ、この例では、図1に示すように、支柱2,3間及び支柱3,3間に5つの分散維持装置41が設けられている。この分散位置装置41は,図9〜図11に示すように、縦方向の連結部材42を有し、この連結部材42はフラットバーなどからなり、各ケーブル4に対応して、二組のUボルト挿通孔43,43が左右に並んで形成され、上下に並んだ挿通孔43,43に対応して連結部材42には受座44が設けられている。そして、この受座44と挿通孔43にUボルト45の端部を挿通し、該端部にナット46を螺合して受座44とUボルト45との間にケーブル4を挟着する。
【0023】
また、前記連結部材42は接地脚部47を有し、この接地脚部47は前記連結部材43の下部に水平部48を設け、この水平部48の透孔49に雄螺子棒50を挿通すると共に、水平部48の上下から前記雄螺子棒50にナット51,51を螺合し、その雄螺子棒50の下部には球状頭部52が設けられ、接地座53は前記球状頭部52が揺動可能に係合する球状受部54を有する。
【0024】
したがって、球状頭部52と球状受部54の係合により雄螺子棒50に対して接地座53が揺動可能となり、また、上下のナット51,51を緩めて雄螺子棒50の上下位置を調整した後、上下のナット51,51を閉めて雄螺子棒50の位置を調整できる。
【0025】
以上にように構成される防護柵1の施工方法について説明する。防護柵1は、例えば山腹の斜面部に設置するものであって、コンクリート基礎7を構築すると共に、該コンクリート基礎7に各パイプ支柱2,3を建て込む。こうして建て込まれた各パイプ支柱2,3の上端を連結杆6によって相互に連結する。この場合、例えば、連結杆6の端部を連結外筒部18に挿入すると共に、仮止め用ネジ22の先端を連結杆6に圧接して仮止めし、枢軸16、21を取り付けて、連結杆6の両側を支柱2,3又は支柱3,3に連結すると共に、仮止め用ネジ22を緩めて支柱2,3又は3,3間の寸法に合わせ連結外筒部18における連結杆6の端部6Aの長さ方向位置を調整した後、すなわち枢軸16,21などに力が加わらない位置に、連結杆6の端部6Aの連結外筒部18の位置を調整し、仮止め用ネジ22を締め、前記挿入用開口部18Aと連結杆6外周との間を防水加工部24により塞ぎ、モルタル注入孔23から充填材たるモルタル25を充填し、連結外筒部18に挿入した連結杆6の端部を連結する。このようにして連結杆6によって連結される各パイプ支柱2,3は、図3に示すように、防護柵1の両側に配置される端末パイプ支柱2と、これら端末パイプ支柱2間の中間支柱3とが一直線状に配置される。ここで、端末パイプ支柱2の取付プレート15は、中間パイプ支柱3側に向くように内側に配置されているが、中間パイプ支柱3の取付プレート15は山Y側に向けることによって、図3に示すように、端末パイプ支柱2と、隣接する中間パイプ支柱3との間に架設される連結杆6、ケーブル4及び金網5は山Y側に向かってやや傾斜する。また、各パイプ支柱2,3は、内部に断面三角状の補強体8及び鉄筋10が一体的に固定されているが、この補強体8はその一側面が各パイプ支柱2,3列の中心線Aと平行するように各パイプ支柱2,3に内側に固定されている。そして、各パイプ支柱2,3の間にケーブル4を架設する。すなわち、各パイプ支柱2,3に固定した取付プレート31に形成する孔33にジョイント金具34を通すと共に、プレート36に形成する挿通孔38のケーブル4の両端を通してケーブル4の端部にストッパ39を固定する。この後、ジョイント金具34の両ねじ部34Aをプレート36の孔37を通してねじ部34にナット35を締め付けることによって各パイプ支柱2,3の間に配置したケーブル4を緊張させる。こうして各パイプ支柱2,3の間にケーブル4を架設した後、各パイプ支柱2,3と連結杆6及びケーブル4に固定金具(図示せず)によって金網5を取り付ける。なお、各パイプ支柱2,3と連結杆6の端部はそれぞれキャップ状の蓋体56によって塞がれている。
【0026】
このように本実施例では、請求項1に対応して、間隔を置いて支柱2,3,3,…2を立設し、これら支柱2,3,3,…2の間に上下に間隔をおいて索状体たるケーブル4を架設すると共に防護用網体たる金網5を張設した防護柵1において、前記各支柱2,3,3,…2の上部に、鋼管から形成された連結杆6を配置し、この連結杆6の端部を支柱2,3,3,…2に前後方向回動可能で且つ上下方向回動可能に連結する回動連結機構14を備えるから、構築した防護柵1によって積雪や落石等を効果的に受け止めことで、雪崩や落石といった自然災害が抑制される。また、各支柱2,3,3,…2の上部を連結杆6で連結することによって、各支柱2,3,3,…2の連結強度を高めることができると共に、各支柱2,3,3,…2に対して連結杆6が前後方向及び上下方向に回動可能に連結されているので、各支柱2,3,3,…2と連結杆6の連結部分で防護壁1に加わる落石あるいは雪崩など加わる衝撃を吸収して支柱の損壊を抑制することができる。
【0027】
また、このように本実施例では、請求項2に対応して、連結杆6が内部に充填材たるモルタル11を充填した充填鋼管であり、回動連結機構14は、連結杆6の端部を挿入連結する連結外筒部18を有するから、連結杆6に充填鋼管を用いることにより、優れた変形性能が得られ、衝撃吸収能力が向上する。また、回動連結機構14は連結外筒部18を有するから、この連結外筒部18を支柱に回動可能に連結し、この連結外筒部18に連結杆6の端部を挿入して連結したり、連結外筒部18に連結杆6の端部を挿入配置してから連結外筒部18を支柱2,3に連結すればよく、支柱2,3への連結杆6の連結作業を容易に行うことができる。
【0028】
このように本実施例では、請求項3に対応して、間隔を置いて支柱2,3,3,…2を立設し、これら支柱2,3,3,…2の間に上下に間隔をおいて索状体たるケーブル4を架設すると共に防護用網体たる金網5を張設した防護柵1において、支柱2,3,3,…2間に縦方向の連結部材42を設け、この連結部材42を上下の索状体たるケーブル4,4…に連結し、連結部材42を接地したから、複数段のケーブル4,4…を連結部材42により連結することにより、ケーブル4,4…を一体化して落石の衝撃エネルギーを複数のケーブル4,4…に分散し、衝撃吸収効果を高めることができる。また、連結部材42は接地しているから、該連結部材42の荷重がケーブル4,4…に加わることがなく、長期に渡ってケーブル4の引張力を保持することができる。
【0029】
また、このように本実施例では、請求項に対応して、索状体たるケーブル4を複数の締め具たるUボルト72により連結部材42に締め付け固定したから、ケーブル4の長さ方向における連結部材42の移動を制御し、落石の衝撃エネルギーを適性に分散し、衝撃吸収効果を高めることができる。
【0030】
また、実施例上の効果として、各パイプ支柱2,3は、地中に建て込まれる部分が内設する補強体8及び鉄筋10によって補強され、かつ、各パイプ支柱2,3の下部にモルタル11を充填することによって、各パイプ支柱2,3の剛性及び強度も向上する。また、各パイプ支柱2,3に内設した三角形状の補強体8は、その一側面が各パイプ支柱2,3列の中心線Aと平行するようにしてコンクリートなどの基礎7に建て込まれるので、防護壁1に落石あるいは雪崩などの衝撃が加わった際、各パイプ支柱2,3の曲げ応力及び剪断応力を高めることができる。この結果、各パイプ支柱2,3の剛性及び強度が一層、向上する。これと共に、各パイプ支柱2,3の上端部を連結杆6によって相互に連結することによって、各パイプ支柱2,3の連結強度も向上する。しかも、各パイプ支柱2,3を相互に連結するための連結杆6の内部にもモルタル11が充填され、防護壁1に衝撃が加わっても、容易に折れ曲がることもない。また、各パイプ支柱2,3と、これを連結する連結杆6とは回動連結機構14によって結合することによって、各パイプ支柱2,3と連結杆6とは溶接などのよって剛的に固定されていないので、各パイプ支柱2,3と連結杆6の回動連結機構14で防護壁1が受ける衝撃を、吸収することができる。
【0031】
また、各パイプ支柱2,3に架け渡したケーブル4と金網5は、各パイプ支柱2,3を連結する連結杆6とほぼ同じ長さに設定されている。すなわち、ケーブル4と金網5は各パイプ支柱2,3の間隔毎に分割されているので、一部のケーブル4あるいは金網5が損傷した場合、部分的なケーブル4あるいは金網5の交換だけでよいため、メンテナンス作業も容易であると共に、コスト的にも安価である。
【0032】
図12〜図16は本発明の第2実施例を示し、上記第1実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、同図は、他の回動連結機構61を示し、この回動連結機構61は、前記支柱2,3の上端に固定する支柱キャップ62と、前記連結杆6の端部を挿入連結する連結外筒部63と、前記支柱キャップ62と連結外筒部63とを前後及び左右回動可能に連結する連結ブラケット64とを備える。前記支柱キャップ62の側面には平面略32°角度をなす連結溝部621が形成され、この連結溝部621の内周側下部には抜止め係合溝622が形成されている。図13に示すように、前記連結ブラケット64の基端部641は、前記連結溝部65とほぼ同高さHで、下部には前記抜止め係合溝622に抜止め状態で係合する係合突起642が下方に突設され、前記連結溝部65に係合した状態で、支柱キャップ62の周方向に連結ブラケット64が回動可能となっている。また、図12及び図14R>4に示すように、前記連結溝部621の円周方向一側端部は、上方を大きく形成した拡大開口部623を有し、この拡大開口部623は、前記係止突起642を備えた基端部641が挿入可能な高さと幅を有し、その拡大開口部623の外側から、前記連結ブラケット64の基端部641を挿入し、係合突起642が係合溝622に係合するように連結ブラケット64を押し下げ、連結溝部621の位置に合わせれば、該連結溝部621に沿って連結ブラケット64を連結状態で回動できる。また、連結ブラケット64の先端部643には、ほぼ前後方向で横方向の透孔644が穿設されている。
【0033】
前記連結外筒部63に一側を閉塞端部631により閉塞し、この閉塞端部631に連結片632を設け、この連結片632にほぼ前後方向で横方向の透孔633を穿設し、この透孔633と連結ブラケット64の透孔644とに、ボルトなどからなる横方向の枢軸65を挿通し、これにより連結ブラケット64に対して連結外筒部63を上下方向回動可能に連結する。したがって、連結外筒部63は、枢軸65を中心に上下方向に回動し、支柱2を中心に前後方向に回動可能になっている。尚、図15に示すように、この例の連結外筒部63は断面四角形の筒体である。
【0034】
また、図16に示すように、中間パイプ支柱3の上端に設ける支柱キャップ62は、両側に前記連結溝部621,621を形成し、これら連結溝部621,621に、前記連結ブラケット64により連結外筒部63がそれぞれ連結され、中間パイプ支柱3の両側に連結杆6,6が連結される。
【0035】
前記連結外筒部63の他側は挿入用開口部634となっており、この挿入用開口部634から前記連結杆6の端部6Aが挿入される。その連結外筒部634には、上記第1実施例と同様に、仮止め用ネジ22を螺合する雌螺子部23が円周方向等間隔に設けられ、さらに、閉塞端部631側には上側に充填材注入孔23が形成されている。そして、拡大開口部623から連結ブラケット64の基端側を挿入して連結ブラケット64を支柱キャップ62に連結し、一方、連結杆6の端部を連結外筒部63に挿入すると共に、仮止め用ネジ22の先端を連結杆6に圧接して仮止めし、枢軸65により連結ブラケット64に連結外筒部63を連結して連結杆6の両側を支柱2,3又は支柱3、3に連結すると共に、仮止め用ネジ22を緩めて支柱2,3又は3,3間の寸法に合わせ連結外筒部63における連結杆6の端部6Aの長さ方向位置を調整した後、すなわち連結溝部621と連結ブラケット64の係合箇所や枢軸64などに力が加わらない位置に、連結杆6の端部6Aの連結外筒部63の位置を調整し、仮止め用ネジ22を締め、前記挿入用開口部634と連結杆6の外周との間を防水加工部24により塞ぎ、前記モルタル注入孔23から充填材たるモルタル25を充填し、連結外筒部63に挿入した連結杆6の端部6Aを連結する。
【0036】
このように本実施例では、回動連結機構61を採用することにより、請求項1及び2に対応して上記第1実施例と同様な作用・効果を奏し、また、請求項3〜に対応して上記第1実施例と同様な作用・効果を奏する。
【0037】
さらに、この例では、支柱キャップ62の連結溝部621に挿入用開口部634を設け、この挿入用開口部634に連結ブラケット64が着脱可能であるから、支柱2,3への連結杆6の連結作業を容易に行うことができる。
【0038】
図17〜21は本発明の第3実施例を示し、上記各実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、同図は、支柱2,3への他のケーブル取付手段を示し、この例のケーブル取付手段では、前記取付プレート31に金具本体71を固定手段たるナット付ボルト72により固定する。前記金具本体71には締め具たるUボルト73が複数並んだ設けられ、この例では、複数のUボルト73,73…が蛇行状の締付け路74を形成している。このように曲がって形成された締付け路74の基端側にはケーブル4を挟む案内突起741が設けられると共に、先端側にはケーブル4が挿通するストッパ止め742が形成されている。そして、締付け路74において、ケーブル4をUボルト73により挟み、Uボルト73の両端部を金具本体71に挿通すると共に、両端部にナット731を螺合することにより所定の締付力により締め付けている。また、前記ストッパ止め742に弾性部材743を設けている。
【0039】
また、ケーブル4の端部には、前記ストッパ止め742に係止可能なストッパ81が設けられている。図19〜図21に示すように、そのストッパ81は、本体82内に先端側に縮小するテーパー孔83を形成し、このテーパー孔83内にテーパー状の楔部材84を設け、この楔部材84の外周には長さ方向の係止溝85が複数設けられ、この例では係止溝85が3箇所設けられ、前記ケーブル4の端部を3分割した分割端部4Aを、それら係止溝85に配置し、締付け固定手段91により楔部材84を先端側に押すことによりケーブル4の端部にストッパ86に固定される。
【0040】
前記締付け固定手段86は、前記本体82の基端側にキャップ861が着脱可能に設けられ、このキャップ861は本体82の係止突起821に係止する係止爪862を有し、係止突起821,821の間から係止爪862を挿通し、キャップ861を回すことにより係止突起821に係止爪862が係止する。前記キャップ861の中央には押圧部材たる押圧ねじ863が螺着され、該押圧ねじ863を締めてその先端により楔部材84を先端側に押し付けることができる。
【0041】
このように本実施例では、前記支柱2,3に索状体たるケーブル4の取付手段を設け、この取付手段は複数の締め具たるUボルト73を並べた締付け路74を有し、その締付け路74にストッパ止め742を設け、ケーブル4の端部にストッパ81を設けたから、落石などによりケーブル4に所定以上の張力が加わったら、Uボルト73の締め付け力に抗してケーブル4がスライドし、衝撃エネルギーを吸収し、ストッパ81がストッパ止め742に当接するまで移動可能となる。また、ストッパ742は、テーパー孔83を有する本体82と、そのテーパー孔83にケーブル4の端部4Aを押し付けて固定する楔部材84と、この楔部材84をテーパー孔83の先端側に押す押付手段を備え、この押付手段がキャップ861に螺合した押圧ねじ863であるから、押圧ねじ863により楔部材84を先端側に押し付け、テーパー孔83と楔部材84との間にケーブル4の端部4Aを圧着してストッパ81を確実に固定することができる。そして、落石などによりケーブル4に所定以上の張力が加わったら、Uボルト73の締め付け力に抗してケーブル4がスライドし、衝撃エネルギーを吸収し、この場合、ストッパ81がストッパ止め742に当接するまで移動可能となる。
【0042】
図22及び図23は本発明の第4実施例を示し、上記各実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、同図は他の締付け固定手段86Aを示し、この例の締付け固定手段86Aは、前記本体82に雄ねじ部822を形成すると共に、この雄ねじ部822に螺合する雌ねじ部864を形成し、キャップ861の内面中央に押圧突起865を設けている。また、キャップ861は締付け作業が容易なように外周が角形となっている。
【0043】
したがって、この例では、キャップ861が押付手段であり、そのキャップ861を締め付けることにより押圧突起865が楔部材84を押し付け、ケーブル4の端部にストッパ81を固定できる。
【0044】
図24は本発明の第5実施例を示し、上記各実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、同図は更に他の締付け固定手段86Bを示し、この例の締付け固定手段86Bは、本体82にキャップ861が螺着され、このキャップ861に前記押圧ねじ863が螺合されている。
【0045】
したがって、この例では、キャップ861と押圧ねじ863の両者が押付手段であり、そのキャップ861の締め付けと押圧ねじ863の締め付けとにより、押圧ねじ863が楔部材84を押し付け、ケーブル4の端部にストッパ81を固定できる。
【0046】
以上、本発明の実施例について詳述したが、本発明は、前記実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば、前記実施例では、各パイプ支柱2,3の内部に断面三角形状の補強体8を設けた例を示したが、補強体8の形状は三角形状に限るものではなく、多角形状、あるいは単に平板状の補強プレートを複数、各パイプ支柱2,3の内面に固定するようにしてもよい。さらに、補強体8を別体で形成し、これを端末パイプ支柱2にスポット溶接などによって一体化した例を示したが、例えば押し出し成形などによって内部に補強体を有するパイプ支柱を一体形成してもよい。さらに、各パイプ支柱2,3と山側とを控えロープにより連結してもよい。また、支柱や連結杆は断面円形や断面四角形などその形状は適宜選定可能である。さらに、充填材はモルタル以外にも各種のものを用いることができるが、そのモルタルやコンクリートなどセメントを混合したセメント系の充填材を用いることが好ましい。
【0047】
【発明の効果】
請求項1の発明は、前記各支柱の上部に、鋼管から形成された連結杆を配置し、この連結杆の端部を前記支柱に前後方向回動可能で且つ上下方向回動可能に連結する回動連結機構を備えるものであり、衝撃吸収効果に優れた防護柵を提供することができる。
【0048】
また、請求項2の発明は、前記連結杆が内部に充填材を充填した充填鋼管であり、前記回動連結機構は、前記連結杆の端部を挿入連結する連結外筒部を有するものであり、衝撃吸収効果に優れた防護柵を提供することができる。
【0049】
請求項の発明は、前記支柱間に縦方向の連結部材を複数設け、これら連結部材を前記上下の索状体に連結し、前記連結部材を接地したものであり、衝撃吸収効果に優れた防護柵を提供することができる。
【0050】
また、請求項の発明は、前記索状体を複数の締め具により前記連結部材に締め付け固定したものであり、衝撃吸収効果に優れた防護柵を提供することができる。
【図面の簡単な説明】
【図1】本発明の第1実施例を示す防護柵の正面図である。
【図2】同上縦断面図である。
【図3】同上平面図である。
【図4】同上端末パイプ支柱の回動連結機構の平面図である。
【図5】同上端末パイプ支柱の上部の正面図である。
【図6】同上連結外筒部の側面図である。
【図7】同上中間パイプ支柱の回動連結機構の平面図である。
【図8】同上中間パイプ支柱の回動連結機構の正面図である。
【図9】同上分散維持装置の連結部材の正面図である。
【図10】同上分散維持装置の下部の正面図である。
【図11】同上分散維持装置の下部の断面図である。
【図12】本発明の第2実施例を示す端末パイプ支柱の回動連結機構の平面図である。
【図13】同上端末パイプ支柱の回動連結機構の断面図である。
【図14】同上回動連結機構の支柱キャップの側面図である。
【図15】同上回動連結機構の連結外筒部の側面図である。
【図16】同上中間パイプ支柱の回動連結機構の平面図である。
【図17】本発明の第3実施例を示すケーブル取付手段の平面図である。
【図18】同上ケーブル取付手段の正面図である。
【図19】同上ストッパの一部切欠き正面図である。
【図20】同上図19のA−A線矢視図である。
【図21】同上図19のB−B線断面図である。
【図22】本発明の第4実施例を示すストッパの一部切欠き正面図である。
【図23】同上ストッパの側面図である。
【図24】本発明の第実施例を示すストッパの一部切欠き正面図である。
【符号の説明】
1 防護柵
2 端末パイプ支柱
3 中間パイプ支柱
4 ケーブル(索状体)
5 金網(防護用網体)
6 連結杆
14,61 回動連結機構
18 連結外筒部
42 連結部材
72 Uボルト(締め具)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protective fence that is constructed on a slope portion of a mountainside, etc., and receives snow and rocks to prevent it from falling or flowing into a road or the like.
[0002]
[Prior art]
Conventionally, a protective fence is known which is constructed on a slope of a mountainside and receives falling rocks and snow, etc., and prevents falling and inflowing onto a road or the like. For example, JP-A-7-197423 Proposed protection fences such as falling rocks with a perforated hole at an interval in the slope, and pipe struts built in the perforated hole side by side, and a multi-stage cable and wire mesh stretched to each pipe strut Has been.
[0003]
This guard fence is formed with a plurality of cable mounting holes for passing cables through the end pipe struts arranged at both ends, and the intermediate pipe struts arranged in the middle part correspond to the cable mounting holes Thus, a bolt for fixing the cable is formed. Then, after attaching the end fitting with a tension function to the cable attachment hole and connecting both ends of the cable to this end fitting, the fixing plate is nut-fastened to the bolt formed on each intermediate pipe post, In addition to fixing the cables that span the intermediate pipe struts, a wire mesh is secured to each pipe strut.
[0004]
Such a guard fence is to catch the falling rock, snow, etc. on each pipe column and the cable that supports it, but the pipe column that supports the mesh is only connected by multiple cables. The connection strength between the plurality of pipe struts is weak, and if an impact such as falling rocks or snow is applied to some intermediate pipes, the intermediate pipes may be damaged. Furthermore, the cables erected on each intermediate pipe strut are also fixed only to the intermediate pipe strut, so if a strong impact is applied to some cables, there is a risk that the cable will be cut due to a strong tensile force. Therefore, there is a problem that the tension strength of the wire mesh and the cable is weak. Also, even if the cable or wire mesh stretched on the pipe strut is partially damaged, the laying strength is significantly reduced. However, the conventional guard fence has a continuous cable and wire mesh over the entire length of the guard fence. The cable and the wire mesh could not be partially exchanged, and the maintenance work was troublesome, and the cost was uneconomical.
[0005]
Further, in FIG. 6 of the above-mentioned Japanese Patent Application Laid-Open No. 7-197423, a spacing member is disposed in the center between the columns, and a plurality of stages of cables are connected by the spacing member. However, the interval holding member is connected to the cable by connection or the like, and performs only the function of holding the interval between the upper and lower cables. Furthermore, since the load of the spacing member itself is applied to the cable, the load of the spacing member is applied to the cable as a load in addition to the metal mesh.
[0006]
An object of the present invention is to provide a protective fence excellent in strength by integrating struts with a connecting rod, and also providing a protective fence excellent in impact absorption effect by integrating a plurality of cords. With the goal.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a guard fence in which struts are erected at intervals, a cord-like body is erected between the struts in the vertical direction, and a protective net is stretched. At the top of Formed from steel pipe A connecting rod is arranged, and a rotation connecting mechanism is provided that connects the end of the connecting rod to the column so as to be rotatable in the front-rear direction and in the vertical direction.
[0008]
According to the configuration of claim 1, natural disasters such as avalanches and falling rocks are suppressed by effectively receiving snow, falling rocks and the like by the constructed protective fence. Also, the top of each column Formed from steel pipe By connecting with connecting rods, the connection strength of each column can be increased, and the connecting rods are connected to each column so as to be rotatable in the front-rear direction and the vertical direction. The struts can be prevented from being damaged by absorbing impacts such as falling rocks or avalanches applied to the protective wall at the connecting portion.
[0009]
According to a second aspect of the present invention, the protective fence is a filled steel pipe in which the connecting rod is filled with a filler, and the rotary connecting mechanism includes a connecting outer cylinder portion that inserts and connects the end of the connecting rod. It is what you have.
[0010]
According to the configuration of the second aspect, by using the filled steel pipe for the connecting rod, excellent deformation performance can be obtained, and the shock absorbing ability can be improved. Moreover, since the rotation connection mechanism has a connection outer cylinder part, this connection outer cylinder part is connected to a support | pillar so that rotation is possible, and the end part of a connection rod is inserted and connected to this connection outer cylinder part, or connection What is necessary is just to connect a connection outer cylinder part to a support | pillar after inserting and arrange | positioning the edge part of a connection rod in an outer cylinder part, and can perform the connection operation | work of the connection rod to a support | pillar.
[0011]
Claims 3 According to the invention, a plurality of vertical connecting members are provided between the columns, the connecting members are connected to the upper and lower cord-like bodies, and the connecting members are grounded.
[0012]
This claim 3 According to the configuration of , Double By connecting several stages of cord-like bodies with a connecting member, the cord-like bodies are integrated to disperse the impact energy of falling rocks into a plurality of cord-like bodies, and the impact absorbing effect is enhanced. Further, since the connecting member is grounded, the load of the connecting member is not applied to the cord-like body.
[0013]
Claims 4 In the invention, the cord-like body is fastened and fixed to the connecting member by a plurality of fasteners.
[0014]
This claim 4 With this configuration, the cord-like body is fastened with a plurality of fasteners and fixed to the connecting member, thereby controlling the movement of the connecting member in the length direction of the cord-like body, and the impact energy of falling rocks is dispersed appropriately, Absorption effect can be enhanced.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the protective fence according to the present invention will be described below with reference to FIGS. The guard fence 1 has a plurality of intermediate pipe struts 3 arranged at intervals between terminal pipe struts 2 arranged on both sides, and a cable 4 as a cord-like body spaced vertically between these pipe struts 2 and 3. Are installed in multiple stages, and a wire mesh 5 knitted with a metal wire is stretched as a protective mesh body. For example, a concrete foundation 7 is provided on a slope of a mountainside, and the concrete foundation 7 is constructed to collect snow, falling rocks, etc. It is a catch.
[0016]
The terminal pipe strut 2 and the intermediate pipe strut 3 are built on a foundation 7 such as concrete. The terminal pipe strut 2 and the intermediate pipe strut 3 thus built are connected to each other by a connecting rod 6. The terminal pipe strut 2, the intermediate pipe strut 3, and the connecting rod 6 are formed of steel pipes having a circular cross-sectional shape. The terminal pipe strut 2 and the intermediate pipe strut 3 having such a hollow structure are reinforced by a reinforcing body 8 provided therein. As shown in FIG. 1, the reinforcing body 8 is formed shorter than the end pipe struts 2 and the intermediate pipe struts 3, and substantially corresponds to the portion embedded in the ground, and the lower portions of the end pipe struts 2 and the intermediate pipe struts 3. Is inserted. This reinforcing body 8 is formed in a polygonal shape, and in this embodiment is formed in a triangular cross section composed of three reinforcing plates 9, each of which is spot welded to the inner peripheral surface of the end pipe strut 2 and the intermediate pipe strut 3. Further, a plurality of reinforcing bars 10 are provided on the inner peripheral surfaces of the terminal pipe strut 2 and the intermediate pipe strut 3 by spot welding. These reinforcing bars 10 are provided with substantially the same length as the reinforcing body 8. The two vertices of the reinforcing plate 9 having a triangular cross section and the reinforcing bars 10 are provided on the pipe struts 2 and 3 on the tensile region side. Further, the terminal pipe strut 2, the intermediate pipe strut 3, and the connecting rod 6 are made solid by filling concrete or mortar 11 as a filler.
[0017]
In the present invention, the connecting rod 6 has a circular cross section, and the ends of the connecting rod 6 are connected to the terminal pipe column 2 and the intermediate pipe column 3 so as to be rotatable in the front-rear direction and the vertical direction by the rotation coupling mechanism 14. Yes. The rotary coupling mechanism 14 fixes a pair of upper and lower mounting plates 15 and 15 for mounting the coupling rod 6 to the outer peripheral upper ends of the terminal pipe column 2 and the intermediate pipe column 3. A vertical pivot 16 made of a bolt or the like is disposed therebetween, and a receiving plate 17 bent in a U-shape is rotatably disposed on the pivot 16. On the other hand, a connecting outer cylinder portion 18 for inserting and connecting the end portion of the connecting rod 6 is formed, one side of the connecting outer cylinder portion 18 is closed by a closing end portion 19, and a connecting piece 20 is connected to the closing end portion 19. The connecting piece 20 is rotatably connected by a lateral pivot 21 made of a bolt or the like in a state where the connecting piece 20 is sandwiched between the receiving plates 17. Therefore, the connecting outer cylinder portion 18 rotates in the vertical direction around the pivot 16 and is rotatable in the front-rear direction around the pivot 21. In addition, the connection outer cylinder part 18 of this example is a cylinder with a circular cross section.
[0018]
The other side of the connecting outer cylinder portion 18 is an insertion opening 18A, and the end of the connecting rod 6 is inserted from the insertion opening. The connecting outer cylinder portion 18 is provided with female screw portions 22A for screwing the temporary fixing screws 22 at equal intervals in the circumferential direction. Further, a filler injection hole 23 is formed on the closed end portion 19 side on the upper side. ing. As shown in FIG. 4 and the like, there is a gap between the end portion 6A of the connecting rod 6 and the closed end portion 19 in the inserted state. Can be adjusted together. Then, the end 6A of the connecting rod 6 is inserted into the connecting outer cylinder portion 18 and the tip of the temporary fixing screw 22 is pressed against the connecting rod 6 to be temporarily fixed, and the pivots 16 and 21 are connected to connect the connecting rod 6 The both ends of the connecting rod 6 are connected to the columns 2, 3 or the columns 3, 3 and the end of the connecting rod 6 in the connecting outer cylinder portion 18 is loosened by loosening the temporary fixing screw 22 to the dimension between the columns 2, 3 or 3, 3. After adjusting the position in the length direction, that is, adjust the position of the end 6A of the end 6A to the connecting rod 6 so that no force is applied to the pivots 16, 21, etc., and tighten the temporary fixing screw 22 The end of the connecting rod 6 inserted into the connecting outer cylinder portion 18 is closed between the insertion opening 18A and the connecting rod 6 by a waterproofing portion 24, filled with the mortar 25 as a filler from the mortar injection hole 23. Connect the parts.
[0019]
7 and 8, the intermediate pipe support 3 is provided with a pair of upper and lower mounting plates 15 and 15 on the front side, and the pivots 16 and 16 are disposed on the left and right sides of the mounting plate 15, respectively. Yes.
[0020]
Further, on the outer periphery of the terminal pipe strut 2 and the intermediate pipe strut 3, in addition to the mounting plate 15 for mounting the connecting rod 6, cable mounting means for mounting the cable 4 is provided. Is fixed corresponding to the number of cables 4. The mounting plate 31 is parallel to the mounting plate 15 and protrudes in the horizontal direction with respect to the terminal pipe support 2. The mounting plate 15 for the connecting rod 6 and the mounting plate 31 for the cable 4 are identical in shape, but the mounting plate 31 for the cable 4 is formed with a hole 33 for mounting the end fitting 32 of the cable 4. The Further, each of the mounting plates 15 and 31 fixed to the end pipe struts 2 disposed at both ends of the protective fence 1 and each of the mounting plates fixed to the intermediate pipe strut 3 disposed between the end pipe struts 2 15 and 31 are slightly different in shape. That is, the mounting plates 15 and 31 fixed to the intermediate pipe support 3 need to be connected to the terminal pipe support 2 or the intermediate pipe support 3 adjacent to the left and right, so as shown in FIG. On the other hand, each of the mounting plates 15 and 31 fixed to the end pipe strut 2 is connected only to the intermediate pipe strut 3 disposed adjacent to the inside thereof. Therefore, as shown in FIG. 4, the whole has a single hole 33 and is formed in a triangular shape.
[0021]
The end fitting 32 is composed of a U-shaped joint fitting 34 and a plate 36 fixed to the joint fitting 34 with a nut 35. The plate 36 is inserted with a threaded portion 34A formed at the base of the joint fitting 34. A pair of holes 37 are formed, and an insertion hole 38 is formed between the holes 37 and 37 and through which the cable 4 passes. The insertion hole 38 is formed with a smaller diameter than the stopper 39 fixed to the end of the cable 4 so as to prevent the stopper 39 from coming off.
[0022]
Further, a plurality of dispersion maintaining devices 41 that disperse the impact energy applied to the cable 4 are provided between the support columns 2 and 3 and between the support columns 3 and 3, and in this example, as shown in FIG. Five dispersion maintaining devices 41 are provided between the support columns 3 and 3. As shown in FIGS. 9 to 11, the distributed position device 41 includes a longitudinal connecting member 42, which is composed of a flat bar or the like, and corresponds to each cable 4 in two sets of U Bolt insertion holes 43 and 43 are formed side by side, and a receiving seat 44 is provided on the connecting member 42 corresponding to the insertion holes 43 and 43 arranged in the vertical direction. Then, the end portion of the U bolt 45 is inserted into the receiving seat 44 and the insertion hole 43, and a nut 46 is screwed into the end portion to sandwich the cable 4 between the receiving seat 44 and the U bolt 45.
[0023]
The connecting member 42 has a grounding leg 47. The grounding leg 47 is provided with a horizontal part 48 at the lower part of the connecting member 43, and the male screw rod 50 is inserted into the through hole 49 of the horizontal part 48. At the same time, nuts 51 and 51 are screwed onto the male screw rod 50 from above and below the horizontal portion 48, and a spherical head 52 is provided below the male screw rod 50. It has a spherical receiving portion 54 that is slidably engaged.
[0024]
Accordingly, the grounding seat 53 can swing with respect to the male screw rod 50 by the engagement of the spherical head 52 and the spherical receiving portion 54, and the upper and lower positions of the male screw rod 50 are lowered by loosening the upper and lower nuts 51, 51. After the adjustment, the position of the male screw rod 50 can be adjusted by closing the upper and lower nuts 51, 51.
[0025]
The construction method of the protection fence 1 comprised as mentioned above is demonstrated. The protective fence 1 is installed on, for example, a slope of a mountainside, and constructs a concrete foundation 7 and embeds each pipe support 2 and 3 in the concrete foundation 7. The upper ends of the pipe struts 2 and 3 thus built are connected to each other by a connecting rod 6. In this case, for example, the end of the connecting rod 6 is inserted into the connecting outer cylinder portion 18, the tip of the temporary fixing screw 22 is temporarily pressed against the connecting rod 6, the pivots 16 and 21 are attached, and the connection The both sides of the rod 6 are connected to the columns 2 and 3 or the columns 3 and 3, and the temporary fixing screws 22 are loosened to match the dimensions between the columns 2, 3 or 3 and 3, so After adjusting the lengthwise position of the end 6A, that is, to a position where no force is applied to the pivots 16, 21, etc., the position of the connecting outer cylinder 18 of the end 6A of the connecting rod 6 is adjusted, and a temporary fixing screw 22 is tightened, the gap between the insertion opening 18A and the outer periphery of the connecting rod 6 is closed by a waterproof portion 24, the mortar 25 as a filler is filled from the mortar injection hole 23, and the connecting rod inserted into the connecting outer cylinder portion 18 is inserted. 6 ends are connected. As shown in FIG. 3, the pipe struts 2 and 3 connected by the connecting rod 6 in this way are terminal pipe struts 2 arranged on both sides of the protective fence 1 and intermediate struts between these terminal pipe struts 2. 3 are arranged in a straight line. Here, the mounting plate 15 of the terminal pipe column 2 is arranged on the inner side so as to face the intermediate pipe column 3 side. As shown, the connecting rod 6, the cable 4 and the wire mesh 5 installed between the terminal pipe column 2 and the adjacent intermediate pipe column 3 are slightly inclined toward the mountain Y side. Each pipe support 2 and 3 is integrally fixed with a reinforcing member 8 and a reinforcing bar 10 having a triangular cross section, and this reinforcing member 8 has a side surface at the center of each of the pipe support columns 2 and 3. The pipe struts 2 and 3 are fixed inside so as to be parallel to the line A. Then, the cable 4 is installed between the pipe struts 2 and 3. That is, the joint fitting 34 is passed through the hole 33 formed in the mounting plate 31 fixed to each pipe support 2, 3, and the stopper 39 is provided at the end of the cable 4 through both ends of the cable 4 of the insertion hole 38 formed in the plate 36. Fix it. Thereafter, the cable 4 disposed between the pipe struts 2 and 3 is tensioned by tightening the nut 35 to the threaded portion 34 through the holes 37 of the plate 36 through the screw portions 34A of the joint fitting 34. After the cable 4 is laid between the pipe struts 2 and 3 in this way, the wire mesh 5 is attached to the pipe struts 2 and 3, the connecting rod 6, and the cable 4 by a fixing bracket (not shown). The end portions of the pipe struts 2 and 3 and the connecting rod 6 are respectively closed by cap-shaped lids 56.
[0026]
As described above, in this embodiment, corresponding to claim 1, the support columns 2, 3, 3,... 2 are set up at intervals, and the support columns 2, 3, 3,. In the protective fence 1 in which a cable 4 as a cord is installed and a wire net 5 as a protective net is stretched, the cable 2 is provided above the support columns 2, 3, 3,. Formed from steel pipe Since the connecting rod 6 is arranged and provided with a rotating connecting mechanism 14 for connecting the end of the connecting rod 6 to the support columns 2, 3, 3,. Natural disasters such as avalanches and falling rocks are suppressed by effectively receiving snow and falling rocks by the protective fence 1 that has been made. In addition, by connecting the upper portions of the support columns 2, 3, 3,... 2 with the connection rod 6, the connection strength of the support columns 2, 3, 3,. Since the connecting rod 6 is pivotably connected to the front and rear directions and the up and down direction with respect to 3, 3,. It can absorb the impacts such as falling rocks or avalanches and suppress the damage to the pillars.
[0027]
In this way, in this embodiment, corresponding to claim 2, the connecting rod 6 is a filled steel pipe filled with mortar 11 serving as a filling material, and the rotating connecting mechanism 14 is provided at the end of the connecting rod 6. Therefore, by using a filled steel pipe for the connecting rod 6, excellent deformation performance can be obtained and the shock absorbing ability can be improved. Further, since the rotation connecting mechanism 14 has a connecting outer cylinder portion 18, the connecting outer cylinder portion 18 is rotatably connected to a support column, and the end of the connecting rod 6 is inserted into the connecting outer cylinder portion 18. The connecting outer cylinder portion 18 may be connected to the columns 2 and 3 after the connection or the end of the connecting rod 6 is inserted and arranged in the connecting outer cylinder portion 18, and the connecting rod 6 is connected to the columns 2 and 3. Can be easily performed.
[0028]
Thus, in this embodiment, the claims To 3 Correspondingly ,while .. 2 are set up at intervals, and a cable 4 as a cord-like body is installed between these supports 2, 3, 3,. In the protective fence 1 in which the body wire mesh 5 is stretched, a vertical connecting member 42 is provided between the support columns 2, 3, 3,... 2 and the connecting member 42 is connected to the cables 4, 4. Since the connection member 42 is grounded, the cables 4, 4... Are connected by the connection member 42, so that the cables 4, 4. It is possible to enhance the shock absorption effect. Further, since the connecting member 42 is grounded, the load of the connecting member 42 is not applied to the cables 4, 4,..., And the tensile force of the cable 4 can be maintained for a long time.
[0029]
In this way, in this embodiment, the claims 4 Corresponding to the cable 4, the cable 4 is fastened and fixed to the connecting member 42 by a plurality of U-bolts 72 serving as fasteners. Therefore, the movement of the connecting member 42 in the length direction of the cable 4 is controlled, and the impact energy of falling rocks is controlled. Can be dispersed appropriately and the impact absorbing effect can be enhanced.
[0030]
Further, as an effect of the embodiment, the pipe struts 2 and 3 are reinforced by a reinforcing body 8 and a reinforcing bar 10 provided in a portion to be built in the ground, and a mortar is provided below the pipe struts 2 and 3. By filling 11, the rigidity and strength of the pipe struts 2 and 3 are also improved. Further, the triangular reinforcing body 8 provided in each of the pipe struts 2 and 3 is built in the foundation 7 such as concrete so that one side surface thereof is parallel to the center line A of each of the pipe struts 2 and 3 rows. Therefore, when an impact such as falling rocks or avalanches is applied to the protective wall 1, the bending stress and the shearing stress of each pipe support 2 and 3 can be increased. As a result, the rigidity and strength of the pipe struts 2 and 3 are further improved. At the same time, the connection strength of the pipe struts 2 and 3 is improved by connecting the upper ends of the pipe struts 2 and 3 with the connecting rod 6. Moreover, the inside of the connecting rod 6 for connecting the pipe struts 2 and 3 to each other is also filled with the mortar 11, and even if an impact is applied to the protective wall 1, it will not be easily bent. In addition, the pipe struts 2 and 3 and the connecting rod 6 connecting them are coupled by a rotating connecting mechanism 14 so that the pipe struts 2 and 3 and the connecting rod 6 are rigidly fixed by welding or the like. Since it is not carried out, the impact which the protection wall 1 receives by the rotation connection mechanism 14 of each pipe support | pillar 2 and 3 and the connection rod 6 can be absorbed.
[0031]
Further, the cable 4 and the wire mesh 5 laid over the pipe struts 2 and 3 are set to have substantially the same length as the connecting rod 6 that connects the pipe struts 2 and 3. That is, since the cable 4 and the wire mesh 5 are divided at intervals between the pipe struts 2 and 3, if a part of the cable 4 or the wire mesh 5 is damaged, it is only necessary to replace the partial cable 4 or the wire mesh 5. Therefore, the maintenance work is easy, and the cost is low.
[0032]
12 to 16 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. 1 shows a dynamic coupling mechanism 61, which includes a column cap 62 fixed to the upper ends of the columns 2 and 3, a connection outer cylinder portion 63 for inserting and connecting the end of the connection rod 6, and the column A coupling bracket 64 that couples the cap 62 and the coupling outer cylinder portion 63 so as to be able to rotate back and forth and right and left is provided. A connecting groove portion 621 having an angle of about 32 ° in the plane is formed on the side surface of the support cap 62, and a retaining engagement groove 622 is formed in the lower portion on the inner peripheral side of the connecting groove portion 621. As shown in FIG. 13, the base end portion 641 of the connecting bracket 64 is substantially the same height H as the connecting groove portion 65, and the lower portion is engaged with the retaining engagement groove 622 in the retaining state. The connection bracket 64 is rotatable in the circumferential direction of the column cap 62 in a state where the projection 642 protrudes downward and engages with the connection groove portion 65. Also, as shown in FIGS. 12 and 14R> 4, one end portion in the circumferential direction of the connecting groove portion 621 has an enlarged opening 623 that is formed large upward, and the enlarged opening 623 is formed in the engagement portion 623. The base end portion 641 provided with the stop projection 642 has a height and width that can be inserted, and the base end portion 641 of the connecting bracket 64 is inserted from the outside of the enlarged opening 623, and the engagement projection 642 is engaged. If the connecting bracket 64 is pushed down so as to engage with the groove 622 and is aligned with the position of the connecting groove 621, the connecting bracket 64 can be rotated in a connected state along the connecting groove 621. In addition, a through hole 644 is formed in the distal end portion 643 of the connecting bracket 64 in the lateral direction substantially in the front-rear direction.
[0033]
One side of the connecting outer cylinder 63 is closed by a closed end 631, a connecting piece 632 is provided at the closed end 631, and a through-hole 633 is formed in the connecting piece 632 in a lateral direction in the front-rear direction. A lateral pivot 65 made of a bolt or the like is inserted into the through-hole 633 and the through-hole 644 of the connection bracket 64, thereby connecting the connection outer cylinder portion 63 to the connection bracket 64 so as to be rotatable in the vertical direction. . Therefore, the connection outer cylinder part 63 rotates in the up-down direction around the pivot 65 and is rotatable in the front-rear direction around the support column 2. In addition, as shown in FIG. 15, the connection outer cylinder part 63 of this example is a cylinder with a square cross section.
[0034]
Further, as shown in FIG. 16, the support cap 62 provided at the upper end of the intermediate pipe support 3 forms the connection groove portions 621 and 621 on both sides, and the connection outer cylinder is connected to the connection groove portions 621 and 621 by the connection bracket 64. The parts 63 are connected to each other, and connecting rods 6 and 6 are connected to both sides of the intermediate pipe support 3.
[0035]
The other side of the connecting outer cylinder portion 63 is an insertion opening 634, and the end 6A of the connecting rod 6 is inserted from the insertion opening 634. As in the first embodiment, the connecting outer cylinder portion 634 is provided with female screw portions 23 for screwing the temporary fixing screws 22 at equal intervals in the circumferential direction, and further on the closed end portion 631 side. A filler injection hole 23 is formed on the upper side. Then, the base end side of the connecting bracket 64 is inserted from the enlarged opening 623 to connect the connecting bracket 64 to the support cap 62, while the end of the connecting rod 6 is inserted into the connecting outer cylinder 63 and temporarily fixed. The tip of the screw 22 is pressed against the connecting rod 6 and temporarily fixed, and the connecting outer cylinder portion 63 is connected to the connecting bracket 64 by the pivot 65, and both sides of the connecting rod 6 are connected to the columns 2, 3 or the columns 3, 3 At the same time, after loosening the temporary fixing screw 22 and adjusting the lengthwise position of the end portion 6A of the connecting rod 6 in the connecting outer cylinder portion 63 in accordance with the dimension between the columns 2, 3 or 3, 3, the connecting groove portion The position of the connecting outer cylinder 63 of the end 6A of the connecting rod 6 is adjusted to a position where force is not applied to the engaging portion of the connecting bracket 64 and the pivot 64, and the temporary fixing screw 22 is tightened. The gap between the opening 634 for use and the outer periphery of the connecting rod 6 is closed by a waterproof portion 24, and the mortar injection hole 23 is Filled with a filler serving mortar 25, connecting the ends 6A of the connecting rod 6 inserted into the connecting outer cylindrical portion 63.
[0036]
As described above, in this embodiment, by adopting the rotation connecting mechanism 61, the same operation and effect as the first embodiment can be obtained corresponding to claims 1 and 2, and 4 Corresponding to the above, the same operations and effects as the first embodiment are achieved.
[0037]
Further, in this example, since the insertion opening 634 is provided in the connection groove 621 of the support cap 62, and the connection bracket 64 is detachable from the insertion opening 634, the connection rod 6 is connected to the supports 2 and 3. Work can be done easily.
[0038]
17 ~ Figure 21 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. A cable attaching means is shown. In the cable attaching means of this example, a metal fitting body 71 is fixed to the attachment plate 31 by a bolt 72 with a nut as a fixing means. A plurality of U-bolts 73 serving as fasteners are arranged in the metal fitting body 71. In this example, a plurality of U-bolts 73, 73,... A guide protrusion 741 that sandwiches the cable 4 is provided on the proximal end side of the tightening path 74 that is bent in this manner, and a stopper stop 742 through which the cable 4 is inserted is formed on the distal end side. In the tightening path 74, the cable 4 is sandwiched between the U bolts 73, both ends of the U bolt 73 are inserted into the metal fitting body 71, and nuts 731 are screwed to both ends to be tightened with a predetermined tightening force. Yes. Further, an elastic member 743 is provided on the stopper stopper 742.
[0039]
A stopper 81 that can be locked to the stopper stopper 742 is provided at the end of the cable 4. As shown in FIGS. 19 to 21, the stopper 81 has a tapered hole 83 that shrinks toward the tip in the main body 82, and a tapered wedge member 84 is provided in the tapered hole 83. A plurality of locking grooves 85 in the length direction are provided on the outer periphery of the cable. In this example, three locking grooves 85 are provided, and the divided end portion 4A obtained by dividing the end portion of the cable 4 is divided into the locking grooves. The wedge member 84 is pushed to the distal end side by the fastening fixing means 91 and is fixed to the stopper 86 at the end of the cable 4.
[0040]
The tightening and fixing means 86 is provided with a cap 861 detachably provided on the base end side of the main body 82. The cap 861 has a locking claw 862 that is locked to the locking protrusion 821 of the main body 82, and the locking protrusion The locking claw 862 is locked to the locking projection 821 by inserting the locking claw 862 from between 821 and 821 and turning the cap 861. A pressing screw 863, which is a pressing member, is screwed into the center of the cap 861, and the wedge member 84 can be pressed against the distal end side by the distal end of the pressing screw 863.
[0041]
As described above, in this embodiment, the supporting means for the cable 4 as the cord-like body is provided on the support columns 2 and 3, and this attaching means has a fastening path 74 in which a plurality of U-bolts 73 as fasteners are arranged. Since the stopper 74 is provided on the path 74 and the stopper 81 is provided at the end of the cable 4, the cable 4 slides against the tightening force of the U bolt 73 when a tension exceeding a predetermined level is applied to the cable 4 due to falling rocks or the like. The impact energy is absorbed and the stopper 81 can move until it comes into contact with the stopper stopper 742. The stopper 742 includes a main body 82 having a tapered hole 83, a wedge member 84 that presses and fixes the end portion 4A of the cable 4 to the tapered hole 83, and a pressing member that pushes the wedge member 84 toward the distal end side of the tapered hole 83. Since the pressing means is a pressing screw 863 screwed into the cap 861, the wedge member 84 is pressed to the distal end side by the pressing screw 863, and the end of the cable 4 is interposed between the tapered hole 83 and the wedge member 84. The stopper 81 can be securely fixed by crimping 4A. When a predetermined tension or more is applied to the cable 4 due to falling rocks or the like, the cable 4 slides against the tightening force of the U bolt 73 and absorbs impact energy. In this case, the stopper 81 comes into contact with the stopper stopper 742. Can be moved to.
[0042]
FIGS. 22 and 23 show a fourth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. 86A, the fastening fixing means 86A of this example forms a male threaded portion 822 in the main body 82 and a female threaded portion 864 that is screwed into the male threaded portion 822, and has a pressing projection 865 in the center of the inner surface of the cap 861. Provided. The cap 861 has a square outer periphery so that the tightening operation is easy.
[0043]
Therefore, in this example, the cap 861 is the pressing means, and by tightening the cap 861, the pressing protrusion 865 presses the wedge member 84, and the stopper 81 can be fixed to the end of the cable 4.
[0044]
FIG. 24 shows a fifth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. FIG. 24 shows another tightening fixing means 86B. In this example, the tightening and fixing means 86B has a cap 861 screwed to a main body 82, and the pressing screw 863 screwed to the cap 861.
[0045]
Therefore, in this example, both the cap 861 and the pressing screw 863 are pressing means, and by pressing the cap 861 and the pressing screw 863, the pressing screw 863 presses the wedge member 84, and the end of the cable 4 is pressed. The stopper 81 can be fixed.
[0046]
As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, an example in which the reinforcing body 8 having a triangular cross section is provided inside each of the pipe struts 2 and 3, but the shape of the reinforcing body 8 is not limited to a triangular shape, but a polygonal shape or A plurality of flat reinforcing plates may be simply fixed to the inner surfaces of the pipe struts 2 and 3. Furthermore, although the reinforcement body 8 was formed as a separate body and this was integrated with the terminal pipe strut 2 by spot welding or the like, a pipe strut having a reinforcement body inside is integrally formed by, for example, extrusion molding. Also good. Furthermore, you may connect each pipe support | pillar 2 and 3 and a mountain side with a reservation rope. Further, the shape of the support pillar and the connecting rod can be selected as appropriate, such as a circular cross section or a square cross section. In addition to mortar, various types of fillers can be used, but it is preferable to use a cement-based filler mixed with cement such as mortar or concrete.
[0047]
【The invention's effect】
The invention of claim 1 A connecting rod formed from a steel pipe is arranged on the upper part of each column, It is provided with a pivot coupling mechanism that couples the end of the coupling rod to the column so that it can pivot in the front-rear direction and in the vertical direction, and can provide a protective fence with an excellent impact absorbing effect.
[0048]
Further, the invention of claim 2 is a filled steel pipe in which the connecting rod is filled with a filler, and the rotation connecting mechanism has a connecting outer cylinder portion for inserting and connecting the end portion of the connecting rod. Yes, it is possible to provide a protective fence excellent in shock absorption effect.
[0049]
Claim 3 According to the invention, a plurality of vertical connecting members are provided between the columns, the connecting members are connected to the upper and lower cable-like bodies, and the connecting members are grounded, and a protective fence having an excellent impact absorbing effect is provided. Can be provided.
[0050]
Claims 4 According to the invention, the cord-like body is fastened and fixed to the connecting member by a plurality of fasteners, and a protective fence excellent in shock absorbing effect can be provided.
[Brief description of the drawings]
FIG. 1 is a front view of a protective fence showing a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the same.
FIG. 3 is a plan view of the same.
FIG. 4 is a plan view of the turning connection mechanism of the terminal pipe column.
FIG. 5 is a front view of the upper part of the terminal pipe column.
FIG. 6 is a side view of the connecting outer cylinder part.
FIG. 7 is a plan view of the turning connection mechanism of the intermediate pipe strut.
FIG. 8 is a front view of the turning connection mechanism of the intermediate pipe strut.
FIG. 9 is a front view of a connecting member of the dispersion maintaining device.
FIG. 10 is a front view of the lower part of the dispersion maintaining apparatus.
FIG. 11 is a sectional view of the lower part of the dispersion maintaining apparatus.
FIG. 12 is a plan view of a terminal pipe strut rotation coupling mechanism showing a second embodiment of the present invention.
FIG. 13 is a cross-sectional view of the rotary connection mechanism of the terminal pipe column.
FIG. 14 is a side view of the support cap of the rotary connecting mechanism.
FIG. 15 is a side view of a connecting outer cylinder portion of the same rotating connecting mechanism.
FIG. 16 is a plan view of the turning connection mechanism of the intermediate pipe strut.
FIG. 17 is a plan view of cable attachment means showing a third embodiment of the present invention.
FIG. 18 is a front view of the cable attaching means.
FIG. 19 is a partially cutaway front view of the stopper.
20 is a view taken along the line AA in FIG.
FIG. 21 is a cross-sectional view taken along the line BB of FIG. 19;
FIG. 22 is a partially cutaway front view of a stopper showing a fourth embodiment of the present invention.
FIG. 23 is a side view of the same stopper.
FIG. 24 is a partially cutaway front view of a stopper showing a first embodiment of the present invention.
[Explanation of symbols]
1 Guard fence
2 Terminal pipe support
3 Intermediate pipe support
4 cable (cord)
5 Wire mesh (protective mesh)
6 Linkage
14, 61 Rotating connection mechanism
18 Connecting outer cylinder
42 Connecting members
72 U bolt (fastener)

Claims (4)

間隔を置いて支柱を立設し、これら支柱の間に上下に間隔をおいて索状体を架設すると共に防護用網体を張設した防護柵において、前記各支柱の上部に、鋼管から形成された連結杆を配置し、この連結杆の端部を前記支柱に前後方向回動可能で且つ上下方向回動可能に連結する回動連結機構を備えることを特徴とする防護柵。In the protective fence in which struts are erected at intervals, and a rope-like body is erected between the struts in the vertical direction and a protective net is stretched , a steel pipe is formed on the top of each strut. A protective fence comprising a rotating connecting mechanism that arranges the connected connecting rod and connects an end portion of the connecting rod to the column so as to be rotatable in the front-rear direction and vertically. 前記連結杆が内部に充填材を充填した充填鋼管であり、前記回動連結機構は、前記連結杆の端部を挿入連結する連結外筒部を有することを特徴とする請求項1記載の防護柵。  2. The protection according to claim 1, wherein the connecting rod is a filled steel pipe filled with a filler, and the rotation connecting mechanism has a connecting outer cylinder portion for inserting and connecting an end portion of the connecting rod. fence. 前記支柱間に縦方向の連結部材を複数設け、これら連結部材を前記上下の索状体に連結し、前記連結部材を接地したことを特徴とする請求項1又は2記載の防護柵。  The protective fence according to claim 1 or 2, wherein a plurality of vertical connecting members are provided between the columns, the connecting members are connected to the upper and lower cable-like bodies, and the connecting members are grounded. 前記索状体を複数の締め具により前記連結部材に締め付け固定したことを特徴とする請求項3記載の防護柵。 3. Symbol mounting of the safety barrier, characterized in that fixed clamping to the connecting member by a plurality of fasteners to the cord-like body.
JP2001226069A 2001-07-26 2001-07-26 Protective fence Expired - Lifetime JP3822807B2 (en)

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Publication number Priority date Publication date Assignee Title
JP4549427B1 (en) * 2009-08-27 2010-09-22 株式会社プロテックエンジニアリング Protective fence
JP5721059B2 (en) * 2012-07-31 2015-05-20 ディガードエンジニアリング株式会社 Method of increasing the size of protective fences and existing protective fences
JP6227316B2 (en) * 2013-07-30 2017-11-08 日鐵住金建材株式会社 Flotage trap and its assembly method
JP7034464B2 (en) * 2017-07-27 2022-03-14 東亜グラウト工業株式会社 Rockfall guard rail
JP6393850B1 (en) 2018-07-13 2018-09-19 株式会社プロテックエンジニアリング Standing structure of support column in guard fence
JP6947404B2 (en) * 2018-11-13 2021-10-13 ベルテクス株式会社 Elevation structure of upper chord material in guard fence
JP6966126B1 (en) * 2020-12-23 2021-11-10 アビエンジニアリング株式会社 Guard rail
JP6990474B1 (en) * 2021-07-20 2022-01-12 株式会社プロテックエンジニアリング Guard rail
CN115306078B (en) * 2022-09-19 2023-11-21 山东建筑大学 Spiral stirrup reinforced steel pipe concrete structure

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