JP3846784B2

JP3846784B2 - Foldable fence

Info

Publication number: JP3846784B2
Application number: JP2002089293A
Authority: JP
Inventors: 茂男由良
Original assignee: 日鐵建材工業株式会社
Priority date: 2002-03-27
Filing date: 2002-03-27
Publication date: 2006-11-15
Anticipated expiration: 2022-03-27
Also published as: JP2003278138A

Description

【０００１】
【発明に属する技術分野】
この発明は、不使用時に背の低い収納状態に倒すことが可能な可倒式柵に関し、特に、台風時に高波を被る恐れのある海岸の道路沿いに設置する防波柵等に適用して好適な可倒式柵に関する。
【０００２】
【従来の技術】
例えば、台風時に高波を被る恐れのある海岸に高速道路が設けられている場合、高波で通行止めが起きないように、何らかの対策が求められる。その対策として消波ブロックや波返しがあるが、これだけでは充分でない。さらには、離岸堤や防波堤のかさ上げ等が考えられるが、費用その他の面でそのような対策を採用できない場合も多い。
【０００３】
また、道路に沿って防波柵を設置する場合もあるが、この種の従来の防波柵は、間隔をあけて設置した固定の支柱間にパネルを固定的に取り付けた構造である。
【０００４】
【発明が解決しようとする課題】
景勝地の海岸沿いの道路に上記防波柵を設置した場合、道路を走行する車両の運転者は防波柵に遮られて景観を楽しむことができないという問題がある。
そこで、防波柵の構造を、支柱やパネルを折り畳み式等の収納可能な構造にして、高波時以外は防波柵を背の低い収納状態にして、走行車両からの景観を確保することが考えられる。
【０００５】
しかし、防波柵を収納状態にする収納作業が十分簡単なものでなければ、防波柵を長い距離に渡って収納することは実際上困難である。
また、収納状態にした時のスペースを広く占める構造は、設置個所の条件等で採用できない場合も多い。
なお、防雪柵では収納可能にする種々の構造が提案されているが、防波柵の場合は、大きな波圧が作用し大きな剛性を必要とするので、簡単な操作で収納状態にすることができ、かつ収納スペースを広く占めない構造とすることは必ずしも容易でない。
【０００６】
本発明は上記事情に鑑みてなされたもので、簡単な操作で収納状態にすることができ、収納スペースを広く占めず、しかも大きな剛性を確保することが容易な、例えば防波柵等に適用して好適な可倒式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】
上記課題を解決する本発明の可倒式柵は、支柱下端部収容スペースを形成する柱脚前部と柱脚後部とを持ち間隔をあけて地盤に固定された柱脚と、各柱脚の柱脚前後部間に下端部を挿入され柱脚前後部間に通した支持軸で当該柱脚に回転可能に軸支された支柱と、左右の支柱間に当該支柱から取り外し可能に取り付けられたパネルとを備えるとともに、前記支柱は、直立状態から適宜の傾斜角度までは柵幅方向に倒れ、その後は柵幅方向に対して水平角を持つ方向に倒れるような捻り転倒構造により柱脚に取り付けられていることを特徴とする。
【０００８】
請求項２は、請求項１の可倒式柵において、支柱の下部に、柵前後方向の一端側が概ね円形断面で他端側が下方に伸びる概ね長円形断面をなす異形軸穴を形成し、支柱を軸支する前記支持軸をこの異形軸穴に通したことを特徴とする。
【０００９】
請求項３は、請求項１または２の可倒式柵において、柱脚前部および柱脚後部の内側面がそれぞれ支柱下部前後面を挟む柵幅方向垂直面を有するとともに、柱脚前部および柱脚後部の上部内側面の一部に、支柱が前記適宜の傾斜角度よりさらに傾いた時に支柱の捻り転倒を許容する水平角方向垂直面を形成したことを特徴とする。
【００１０】
請求項４は、請求項１の可倒式柵において、パネルを横長の複数のパネル片をリンク機構により順次上下に連結して構成するとともに、前記リンク機構は、パネルを支柱から取り外した時に、各パネル片がそれぞれ概ね縦の姿勢で柵前後方向に並ぶ収納状態を取ることができるように、隣接するパネル片どうしを連結するものであることを特徴とする。
【００１１】
請求項５は、請求項４における上下に隣接するパネル片どうしを連結する前記リンク機構は、下側のパネル片の上端近傍と上側のパネル片の高さ方向中間近傍とを連結して、又はその逆の関係で連結して構成したことを特徴とする。
【００１２】
請求項６は、請求項１、３または４の可倒式柵において、各柱脚の前面または後面に、下り傾斜で柵前方または後方に延出するパネル受けを設けたことを特徴とする。
【００１３】
請求項７は、請求項６の可倒式柵におけるパネル受けに、支柱を概ね水平な収納状態に受ける支柱受けを取り付けたことを特徴とする。
【００１４】
請求項８は、請求項１、４または５の可倒式柵における支柱が、下部が柱脚の柱脚前後部間に収容され軸支されるＨ形断面の支柱本体と、前記支柱本体の前面又は後面にＴ断面部材を溶接固定して形成したパネル収容部とを備えたことを特徴とする。
【００１５】
請求項９は、請求項１の可倒式柵における左右の柱脚間に固定パネルを固定したことを特徴とする。
【００１６】
【発明の実施の形態】
図１〜図１５に本発明の一実施形態の可倒式柵1を示す。図１は実施形態の可倒式柵１の使用状態の正面図、図２は同右側面図、図３は同平面図である。図４は上記可倒式柵１の収納状態の正面図、図５は同右側面図、図６は同平面図である。また、図７は使用状態の可倒式柵1の要部を示した斜視図である。
【００１７】
実施形態の可倒式柵1は、例えば、台風時に高波を被る恐れのある海岸の高速道路に沿って設置した防波柵であり、間隔をあけて地盤に固定した柱脚２と、各柱脚２に回転可能に軸支された支柱３と、左右の支柱３間に当該支柱３から取り外し可能に取り付けられたパネル４とを備えている。そして、前記支柱３は、図１、図２、図７等に示した直立状態から適宜の傾斜角度までは柵幅方向（図１、図２、図６等で左右方向）に倒れ、その後は、上から見て柵幅方向に対して水平角θを持つ方向に倒れるような捻り転倒構造５により柱脚２に取り付けられている。
【００１８】
前記柱脚２は、図７、図８、図９等にも詳細を示すように、いずれもウエブ厚の厚い特殊な溝形鋼による柱脚前部６と柱脚後部７とをウエブ側を内側に向けて対向させ、両者６，７間に介在させた補強リブ８に溶接固定して支柱下端部収容スペース２ａを形成し、ベースプレート９上に溶接固定した構造である。補強リブ８には支柱３を垂直状態に係止する際に利用する係止穴８ａをあけている。なお、柵の前後方向として、図２で左側を前方とする。
前記支柱３は、その下部が図７、図９、図１１等にも示すように、柱脚前後部６、７間の前述の支柱下部収容スペース２ａに収容され、柱脚前後部６、７間に通した支持ボルト（支持軸）１０で柵幅方向に回転可能に支持されている。６ｃ、７ｃは支持ボルト１０を通すボルト挿通穴である。
柱脚前部６および柱脚後部７の内側面は、図８、図９等にも詳細を示すように、それぞれ支柱３下部前後面を挟む柵幅方向垂直面６ａ、７ａを有するとともに、柱脚前部６および柱脚後部７の上部内側面の一部に、詳細は後述するが、支柱３が一定の傾斜角度よりさらに傾いた時に支柱３の捻り転倒を許容する水平角方向垂直面６ｂ、７ｂを形成している。したがって、柱脚２の上端から寸法ｈだけ下方位置（図８参照）に段差部６ｄ、７ｄが形成されている。なお、水平角方向垂直面６ｂ、７ｂを形成する手段としては、ウエブ厚の厚い特殊な溝形鋼の一部を切り欠いて形成してもよいが、ウエブ厚が通常程度の溝形鋼に所定厚みの平板およびテーパ板を溶接固定して形成することも可能である。
【００１９】
前記支柱３は、下部が柱脚２に軸支されるＨ形鋼による支柱本体１３と、前記支柱本体１３の前面にパネル収容溝１４ａが形成されるようにＴ断面部材を溶接固定して形成したパネル収容部１４とからなっている。パネル収容部１４は、柱脚２の上端よりやや上方位置まで存在しており、Ｔ断面の横部の下端に前方下向きに傾斜したガイド板１６を固定している。なお、Ｔ断面の縦部は隣接するスパンとの仕切りとしてさらに若干下方に伸びている。
図９〜図１１にも詳細を示すように、Ｈ形鋼である支柱本体１３の下部の中心部分に、柵前後方向（図１１で左右方向）の一端側が円形断面で他端側が下方に伸びる長円形断面をなす異形テーパ管１７を貫通状態で溶接固定して、異形軸穴１７ａを形成している。支持ボルト１０を柱脚前後部６、７のボルト挿通穴６ｃ、７ｃおよび異形軸穴１７ａを通し、ナット１８で締め付けて、支柱３を柱脚２に回転可能に取り付ける。異形テーパ管１７（異形軸穴１７ａ）、支持ボルト１０、柱脚前部６、７の柵幅方向垂直面６ａ、７ａ・水平角方向垂直面６ｂ、７ｂ等により捻り転倒構造５、すなわち支柱３が直立状態から適宜の傾斜角度までは柵幅方向に倒れ、その後は柵幅方向に対して水平角を持つ方向に倒れるような捻り転倒構造５が構成されている。図１２は支柱３を水平角θを持つ方向に水平に倒した状態を示す。
【００２０】
前記パネル４は、横長の複数のパネル片２０を、図１３〜図１５にも示すように、リンク機構２１により順次上下に連結して構成している。このリンク機構２１は、パネル４を支柱３のパネル収容溝１４ａに沿って下方に引き出すことを可能にし、かつそのようにしてパネル４を支柱３から取り外した時に、各パネル片２０が図５に示すように、それぞれ縦の姿勢で柵前後方向（図５で左右方向）に並ぶ収納状態を取ることができるように、隣接するパネル片２０どうしを連結するものである。
図示例のパネル片２０は、２山の軽量鋼矢板２２の両端にＬ形断面のサイドプレート２３を溶接固定した構成である。
前記リンク機構２１は、パネル片２０の両側のサイドプレート２３部分に設けられており、実施形態では隣接するパネル片２０の上端の前面側位置（図１４で左側位置）に固定したピン２４と上側のパネル片２０の中心位置（高さ方向中間位置および前後方向中間位置）に固定したピン２５とをリンク２６で連結して構成している。これにより、収納状態のパネル４の一番上のパネル片２０をパネル収容溝１４ａ内にその下端から導き、パネル収容溝１４ａに沿って引き上げると、リンク機構２１で連結されている下側のパネル片２０が順次パネル収容溝１４ａに沿って引き上げられて、使用状態の広い面状のパネル４となる。
なお、図示例のリンク機構２１は一例として模式的に示したものであって、この機構に限定されない。要するに、使用状態では各パネル片２０が上下に連なった１枚のパネル（但し、若干間隔があくことは差し支えない）となり、支柱３から取り外した時には、各パネル片２０がそれぞれ縦の姿勢で柵前後方向に並ぶ収納状態を取ることができるように連結されていればよい。
また、実施形態ではパネル片２０の両側面部に、パネル片２０をパネル収容溝１４ａに円滑に導くためのガイド２７を設けている。このガイド２７は、一方の面を平行四辺形（図１４参照）に形成したＬ形断面部材（図１３参照）をサイドプレート２３に溶接固定し、平行四辺形の中心部にリンク機構２１のピン２５を嵌入させた構成である。
【００２１】
各柱脚２の前面側に、下り傾斜で柵前方に延出するパネル受け３０を設けている。このパネル受け３０は、図５に示すように各パネル片２０を縦の姿勢で柵前後方向に並んだ状態で受けるためのもので、断面が逆Ｔ字形をなしており、逆Ｔの上向き縦部３０ａが、隣接するスパンとの間の仕切りとなっている。また、前記上向き縦部３０ａに、支柱３を図４、図５に示すように水平な収納状態に受ける平板状の支柱受け３１を溶接固定している。また、パネル受け３０の下端に、パネル片２０がパネル受け３０から滑り落ちないためのストッパ３２を設けている。
【００２２】
また、実施形態の防波柵１は、左右の柱脚間２に、下部の開口を塞ぐための固定に固定パネル３３を備え（図１参照）、さらに、この固定パネル３３とパネル４との間に生じた若干の隙間を塞ぐために、最下段のパネル４の下端縁に補助パネル片３４を一体に固定している。
【００２３】
上記の防波柵１は、道路が台風時の高波を被る恐れのある時は、図１〜図３等のように、支柱３を垂直に立て係止ボルト３６を支柱本体１３の係止穴１３ａおよび柱脚２の補強リブ８の係止穴８ａに挿入しナット締めして垂直状態に係止し、かつパネル４を支柱３間に配置させた状態で使用する。なお、パネル４はその上端部（最上段のパネル片２０）が図示略の係止機構により支柱３に係止されており、続く下側の各パネル片２０が吊り下がった状態となって、左右の支柱３間に広い面状に張られている。
この場合、支柱本体１３が十分な剛性のあるＨ形鋼であり、かつその下端部は剛性の十分高い柱脚２の柱脚前後部６、７の柵幅方向垂直面６ａ、７ｂに接触するので、支柱３は十分大きな波圧に耐えることができる。
パネル４を構成する各パネル片２０は、剛性の大きな軽量鋼矢板を用いているので、かつ、両端が支柱本体１３の前面で受け止められるように、パネル収容溝１４ａに収容されているので、十分大きな波圧に耐えることができる。
なお、実施形態の防波柵１は、スパン（支柱間隔）２．０ｍ、高さ５．０ｍのサイズで、波圧４．０７トン／ｍ^２、風圧１５１kg/ｍ^２程度の圧力に耐えることができる構造である。
また、柱脚２間の固定の固定パネル３３は、高波がパネル４の下方開口から道路に浸入するのを防ぐ。また、最下段のパネル片２０の下縁に固定した補助パネル片３４は、高波がパネル４と固定パネル３３との間から浸入するのを防ぐ。
【００２４】
高波を被る恐れのない時期には、図示略のパネル係止機構を解除して、パネル４を支柱３のパネル収容溝１４ａに沿って下方に引き出す。この場合、最下段のパネル片２０をパネル収容溝１４ａから引き出すと、リンク機構２１の作用により、順次下側のパネル片２０がパネル受け３０上にそれぞれ縦の姿勢で柵前後方向（図５で左右方向）に並んだ収納状態で収納される。各パネル片２０が縦の状態で柵前後方向に並ぶので、収納状態において柵前後方向に占めるスペースは狭く済む。
次いで、係止ボルト３６を外し、支柱３を支持ボルト１０を中心として柵幅方向に回転させる。支柱３が一定の傾斜角度まで傾くまでは、Ｈ形鋼である支柱本体１３の前後面が柱脚前後部６、７の柵幅方向垂直面６ａ、６ｂに接触して柵幅方向に回転するが、その後、支柱３を柵幅方向に対して水平角θ（図６参照）を持つ方向に傾ける。この場合、柱脚前後部６、７の内側面に水平角方向垂直面６ｂ、７ｂが形成されているので、支柱３を水平角θ方向に傾けることができ、かつ、水平角方向垂直面６ｂ、７ｂに沿ってさらに倒すことができ、支柱３を図４、図５のように水平に倒した収納状態とすることができる。
この場合、支持ボルト１０を通した支柱３側の異形軸穴１７ａが、前端側が円形断面で後端側が下方に伸びた長円形断面をなしているから、支柱３に水平角を付けて下方に倒す捻り転倒動作が可能となっている。このように、支柱３が最後まで柵幅方向に倒れて水平になるのでなく、最終的には水平角θを持つ方向を向くので、隣接するスパンの支柱３が重なることなく収納することができ、収納状態の支柱３の頂部位置を低くすることができる。この収納状態で、支柱３およびパネル片２０の頂部位置を例えば路面から１ｍ程度にすることができる。
このように、不使用時に支柱３およびパネル４の背を十分低くできるので、当該収納状態の防波柵１により、支障となるような広い範囲に日陰が生じることはない。
【００２５】
使用時には、図３〜図５の収納状態から、まず、支柱３を前述と逆の動作で垂直に立てる。この場合、支柱３を水平角θ方向のまま一定の傾斜角度まで起こし、次いで、支柱３を水平角θだけ水平に回転させて柵幅方向に向け、その状態で支柱３を支持ボルト１０を中心として柵幅方向に回転させて、垂直に立てる。次いで、係止ボルト３６を支柱本体１３の係止穴１３ａおよび柱脚２の補強リブ８の係止穴８ａに挿入しナット締めして垂直状態に係止する。
次いで、パネル受け３０上に並んで置かれたパネル片２０の一番上のパネル片２０を支柱３のパネル収容溝１４ａ内にその下端部から導き、引き上げると、残りのパネル片２０がリンク機構２１により順次パネル収容溝１４ａ内で引き上げられて、広い面状のパネル４となる。
なお、パネル片２０を引き上げる具体的手段については特に言及しなかったが、例えば支柱３の上端に滑車を取り付け、この滑車に通したワイヤロープを最上段のパネル片２０に取り付け、ワイヤロープを引いてパネル片２０を引き上げる方法その他、種々の方法を採用できる。なお、人力で行うことが可能であれば人力でよい。
【００２６】
なお、パネル片２０は、実施形態のような軽量鋼矢板を用いたものに限らず、デッキプレート等の他の波板、その他適宜の材料を用いることができる。また、パネル４を構成するパネル片２０の数も実施形態の８枚に限らず、任意である。また、本発明の可倒式柵は、防波柵に適用して好適であるが、用途は特に限定されない。
【００２７】
【発明の効果】
本発明によれば、パネルが支柱から取り外し可能であり、かつ固定の柱脚に取り付けた支柱を倒すことができるので、不使用時にはパネルおよび支柱を背の低い状態に収納することができ、道路沿いに設置した場合、走行車両からの景観を確保することができる。
また、支柱が、直立状態から適宜の傾斜角度までは柵幅方向に倒れ、その後は柵幅方向に対して水平角を持つ方向に倒れるような捻り転倒構造により柱脚に取り付けられているので、不使用時にはパネルおよび支柱を背の低い状態に収納することができる。したがって、隣接するスパンの支柱を互いに重ならないように水平に倒すことができ、収納状態の支柱の頂部位置を十分に低くすることができる。
柱脚に取り付ける支柱自体は、上記のように十分背の低い収納状態にできるにも拘わらず、単一であり複数に分割していないので、高い剛性を確保することが容易であり、防波柵等のような大きな荷重が作用する柵を可倒構造にする場合に好適である。また、高い剛性を容易に確保できるので、高波が乗り越えないような高い防波柵を容易に製作することができ、この点でも防波柵に適用して好適である。
また、柵の全体構造としても、十分背の低い収納状態とすることができるにも拘わらす、単純な構造なので、安価に製作できる。
【００２８】
請求項２のように、支柱の下部に、柵前後方向の一端側が概ね円形断面で他端側が下方に伸びる概ね長円形断面をなす異形軸穴を形成し、支柱を軸支する前記支持軸をこの異形軸穴に通した捻り転倒構造によれば、簡単な構造でもって、支柱が柵幅方向に倒れ次いで水平角を持つ方向に倒れる動作を容易に実現できる。
【００２９】
請求項３のように、柱脚前部および柱脚後部の内側面に柵幅方向垂直面および水平角方向垂直面を形成すれば、簡単な構造でもって、支柱が柵幅方向に倒れ次いで水平角を持つ方向に倒れる捻り転倒動作を容易に実現できる。
【００３０】
請求項４のように、パネルを横長の複数のパネル片をリンク機構により順次上下に連結して構成するとともに、このリンク機構を、各パネル片がそれぞれ概ね縦の姿勢で柵前後方向に並ぶ収納状態を取るように機構とすれば、パネルをコンパクトな収納状態にすることができる。
【００３１】
請求項５のように、下側のパネル片の上端近傍と上側のパネル片の高さ方向中間近傍とを連結、またはその逆の関係で連結したリンク機構によれば、各パネル片がそれぞれ概ね縦の姿勢で柵前後方向に並ぶ収納状態を取る機構を、簡単な機構で実現できる。
【００３２】
請求項６のように、各柱脚の前面または後面に、下り傾斜で柵前方または後方に延出するパネル受けを設けると、上記のパネル片を連結するリンク機構の作用と相俟って。パネル片を柵前後方向の出っ張りを最小限にすることができる。
【００３３】
請求項７のようにパネル受けに、支柱を概ね水平な収納状態に受ける支柱受けを取り付けると、簡単な構造で支柱を水平な収納状態に保持できる。
【００３４】
請求項８によれば、支柱が、下部が柱脚の柱脚前後部間に収容され軸支されるＨ形断面の支柱本体と、前記支柱本体の前面又は後面にＴ断面部材を溶接固定して形成したパネル収容部とを備えているので、パネル片の引き出し・引き入れが可能な構造とすることが容易である。
【００３５】
請求項９によれば、左右の柱脚間に設けた固定パネルにより、波の通過を確実に防止できる。
【図面の簡単な説明】
【図１】本発明の一実施形態を示すもので、防波柵として適用された可倒式柵の使用状態の正面図である。
【図２】図１の右側面図である。
【図３】図１の平面図である。
【図４】上記可倒式柵の収納状態の正面図である。
【図５】図４の右側面図である。
【図６】図４の平面図である。
【図７】図１の使用状態の可倒式柵の要部を示した斜視図である。
【図８】図７における柱脚の要部の拡大図である。
【図９】支柱下部を柱脚に捻り転倒可能に取り付ける捻り転倒構造を説明するもので、使用状態における柱脚部分の平面図である。
【図１０】図９のＡ−Ａ断面図である。
【図１１】図９のＢ−Ｂ断面図である。
【図１２】図９に対応する図であり、不使用状態における柱脚部分の平面図である。
【図１３】パネルと支柱との係合構造およびパネル片どうしを連結するリンク機構を示す平面図である。
【図１４】図１３のＣ−Ｃ断面図である。
【図１５】図１３のＤ−Ｄ断面図である。
【符号の説明】
１可倒式柵（防波柵）
２柱脚
２ａ支柱下端部収容スペース
３支柱
４パネル
５捻り転倒構造
６柱脚前部
７柱脚後部
６ａ、７ａ柵幅方向垂直面
６ｂ、７ｂ水平角方向垂直面
６ｃ、７ｃボルト挿通穴
８補強リブ
８ａ係止穴
１０支持ボルト（支持軸）
１３支柱本体
１４パネル収容部
１４ａパネル収容溝
１６ガイド板
１７異形テーパ管
１７ａ異形軸穴
２０パネル片
２１リンク機構
２２軽量鋼矢板
２３サイドプレート
２４、２５ピン
２６リンク
２７ガイド
３０パネル受け
３１支柱受け
３２ストッパ
３３固定パネル
３４補助パネル片
３６係止ボルト[0001]
[Technical field belonging to the invention]
The present invention relates to a collapsible fence that can be collapsed into a short storage state when not in use, and is particularly suitable for application to a wave breaker installed along a coastal road that may suffer high waves during a typhoon. Related to the retractable fence.
[0002]
[Prior art]
For example, when a highway is provided on a coast that may be subjected to high waves during a typhoon, some measures are required to prevent the high waves from closing. Countermeasures include wave-dissipating blocks and wave return, but this is not enough. Furthermore, it is conceivable to increase the breakwater or breakwater, but there are many cases where such measures cannot be adopted in terms of cost and other aspects.
[0003]
Moreover, although a breakwater fence may be installed along the road, this type of conventional breakwater fence has a structure in which a panel is fixedly attached between fixed support columns installed at intervals.
[0004]
[Problems to be solved by the invention]
When the above-mentioned break fence is installed on a road along the coast of a scenic spot, there is a problem that a driver of a vehicle traveling on the road cannot be enjoyed by being blocked by the break fence.
Therefore, it is possible to secure the landscape from the traveling vehicle by making the structure of the breakwater into a structure that can be stored such as folding the columns and panels, and the breakwater fence in a low stowage state except during high waves. Conceivable.
[0005]
However, unless the storing operation to put the breaker into the retracted state is sufficiently simple, it is practically difficult to store the breaker fence over a long distance.
In addition, a structure that occupies a large space when placed in a housed state often cannot be adopted depending on the conditions of the installation location.
Various structures that can be stored in snow fences have been proposed. However, in the case of a wave fence, a large wave pressure acts and a large rigidity is required. It is not always easy to make a structure that does not occupy a large storage space.
[0006]
The present invention has been made in view of the above circumstances, and can be put into a storage state by a simple operation, does not occupy a large storage space, and can be easily secured with a large rigidity, for example, applied to a breakwater fence or the like. And it aims at providing a suitable collapsible fence.
[0007]
[Means for Solving the Problems]
The collapsible fence of the present invention that solves the above problems includes a column base that has a column base front part and a column base rear part that form a column lower end accommodating space, and is fixed to the ground with a space therebetween. A support shaft that is inserted between the front and rear portions of the column base and inserted between the front and rear portions of the column base so as to be pivotally supported by the column base, and is removably mounted between the left and right columns. The column is attached to the column base by a twisting and falling structure that falls in the fence width direction from an upright state to an appropriate inclination angle and then falls in a direction having a horizontal angle with respect to the fence width direction. It is characterized by being.
[0008]
Claim 2 is the retractable fence according to claim 1, wherein an odd-shaped shaft hole having a substantially oval cross section in which one end side in the front-rear direction of the fence extends in a substantially circular cross section and the other end side extends downward is formed in the lower part of the support pillar. The support shaft that pivots the shaft is passed through the deformed shaft hole.
[0009]
Claim 3 is the collapsible fence according to claim 1 or 2, wherein the inner surface of the front part of the column base and the rear part of the rear part of the column base each have a vertical surface in the width direction of the fence sandwiching the front and rear surfaces of the lower part of the column. A horizontal vertical vertical surface is formed on a part of the upper inner side surface of the rear part of the column base to allow the column to be twisted and overturned when the column is further inclined from the appropriate inclination angle.
[0010]
According to a fourth aspect of the present invention, in the retractable fence of the first aspect, the panel is configured by sequentially connecting a plurality of horizontally long panel pieces up and down sequentially by a link mechanism, and when the panel is removed from the column, Adjacent panel pieces are connected to each other so that each panel piece can take a storage state in which the panel pieces are arranged substantially vertically in a longitudinal direction.
[0011]
According to a fifth aspect of the present invention, the link mechanism that connects the vertically adjacent panel pieces in the fourth aspect connects the vicinity of the upper end of the lower panel piece and the vicinity of the middle in the height direction of the upper panel piece, or It is characterized by being connected in the reverse relationship.
[0012]
According to a sixth aspect of the present invention, in the retractable fence according to the first, third, or fourth aspect, a panel receiver is provided on the front or rear surface of each column base so as to extend forward or rearward of the fence with a downward slope.
[0013]
According to a seventh aspect of the present invention, a column support for receiving the column in a substantially horizontal storage state is attached to the panel receiver in the retractable fence of the sixth aspect.
[0014]
An eighth aspect of the present invention relates to a column main body having an H-shaped cross section in which the lower column of the collapsible fence according to the first, fourth, or fifth aspect is accommodated and pivotally supported between the column base front and rear portions of the column base, And a panel accommodating portion formed by welding and fixing a T-section member on the front surface or the rear surface.
[0015]
A ninth aspect is characterized in that a fixed panel is fixed between the left and right column bases of the retractable fence according to the first aspect.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
1 to 15 show a collapsible fence 1 according to an embodiment of the present invention. FIG. 1 is a front view of the retractable fence 1 according to the embodiment in use, FIG. 2 is a right side view thereof, and FIG. 3 is a plan view thereof. 4 is a front view of the retractable fence 1 in a stored state, FIG. 5 is a right side view thereof, and FIG. 6 is a plan view thereof. FIG. 7 is a perspective view showing the main part of the retractable fence 1 in use.
[0017]
The collapsible fence 1 of the embodiment is, for example, a breakwater fence installed along a coastal highway that may be subjected to high waves during a typhoon, and a column base 2 fixed to the ground at intervals, and each pillar A support column 3 rotatably supported on the leg 2 and a panel 4 detachably attached to the support column 3 between the left and right support columns 3 are provided. And the said support | pillar 3 falls in the fence width direction (left-right direction in FIG.1, FIG.2, FIG.6 etc.) from the upright state shown in FIG.1, FIG.2, FIG.7 etc. to a suitable inclination angle, and after that, It is attached to the column base 2 by a twisting and falling structure 5 that falls in a direction having a horizontal angle θ with respect to the fence width direction when viewed from above.
[0018]
As shown in detail in FIGS. 7, 8, 9, and the like, the column base 2 has a column base front portion 6 and a column base rear portion 7 made of special channel steel having a large web thickness on the web side. The structure has a structure in which a support lower end portion accommodating space 2a is formed by welding and fixing to a reinforcing rib 8 that is opposed to the inside and interposed between the two and 7, and is fixed on the base plate 9 by welding. The reinforcing rib 8 is provided with a locking hole 8a that is used when the support column 3 is locked in a vertical state. In addition, let the left side be front in FIG. 2 as the front-back direction of a fence.
As shown in FIGS. 7, 9, 11, etc., the lower portion of the support column 3 is accommodated in the aforementioned support lower portion receiving space 2 a between the column base front and rear portions 6 and 7, and the column base front and rear portions 6 and 7. A support bolt (support shaft) 10 interposed between them is supported so as to be rotatable in the fence width direction. Reference numerals 6c and 7c denote bolt insertion holes through which the support bolts 10 are passed.
As shown in detail in FIGS. 8 and 9 and the like, the inner side surfaces of the column base front part 6 and the column base rear part 7 have rail width direction vertical surfaces 6a and 7a sandwiching the front and rear surfaces of the lower part of the column 3, respectively. As will be described in detail later, a part of the upper inner surface of the leg front part 6 and the column base rear part 7 will be described later, but when the support column 3 is further tilted from a certain tilt angle, the vertical vertical surface 6b that allows the torsion of the support column 3 is allowed. , 7b. Accordingly, step portions 6d and 7d are formed at positions below the upper end of the column base 2 by a dimension h (see FIG. 8). As a means for forming the horizontal angle direction vertical surfaces 6b and 7b, a special grooved steel having a thick web thickness may be cut out, but a grooved steel having a normal web thickness may be used. It is also possible to form by fixing a flat plate and a tapered plate having a predetermined thickness.
[0019]
The support column 3 is formed by welding and fixing a T-section member with a H-shaped steel column body 13 whose lower part is pivotally supported by the column base 2 and a panel receiving groove 14a formed on the front surface of the support column body 13. Panel receiving portion 14. The panel accommodating part 14 exists to a position slightly above the upper end of the column base 2, and a guide plate 16 that is inclined forward and downward is fixed to the lower end of the horizontal part of the T section. In addition, the vertical part of the T cross section extends slightly further downward as a partition with the adjacent span.
As shown in detail in FIGS. 9 to 11, one end side in the longitudinal direction of the fence (left and right direction in FIG. 11) extends in a circular cross section and the other end side extends downward in the central portion of the lower portion of the column main body 13 that is H-shaped steel. A deformed tapered tube 17 having an oval cross section is welded and fixed in a penetrating state to form a deformed shaft hole 17a. The support bolt 10 is passed through the bolt insertion holes 6 c and 7 c and the deformed shaft hole 17 a of the column base front and rear portions 6 and 7, and tightened with the nut 18, so that the column 3 is rotatably attached to the column base 2. Twist-and-turn structure 5, that is, column 3, is formed by deformed taper pipe 17 (deformed shaft hole 17 a), support bolt 10, column width direction vertical surfaces 6 a, 7 a and horizontal angular direction vertical surfaces 6 b, 7 b, etc. The torsional fall structure 5 is configured such that it falls in the fence width direction from an upright state to an appropriate inclination angle and then falls in a direction having a horizontal angle with respect to the fence width direction. FIG. 12 shows a state in which the column 3 is tilted horizontally in the direction having the horizontal angle θ.
[0020]
The panel 4 is configured by sequentially connecting a plurality of horizontally long panel pieces 20 up and down by a link mechanism 21 as shown in FIGS. This link mechanism 21 enables the panel 4 to be drawn downward along the panel receiving groove 14a of the support column 3, and when the panel 4 is removed from the support column 3 in this way, each panel piece 20 is shown in FIG. As shown, adjacent panel pieces 20 are connected to each other so that they can be stored in a vertical posture and in a storage state in the longitudinal direction of the fence (left and right in FIG. 5).
The panel piece 20 in the illustrated example has a configuration in which L-shaped side plates 23 are welded and fixed to both ends of two lightweight steel sheet piles 22.
The link mechanism 21 is provided on the side plate 23 portion on both sides of the panel piece 20. In the embodiment, the link mechanism 21 is fixed to the front side position (left side position in FIG. 14) of the upper end of the adjacent panel piece 20 and the upper side. The pin 25 fixed to the center position (height direction intermediate position and front-rear direction intermediate position) of the panel piece 20 is connected by a link 26. Accordingly, when the uppermost panel piece 20 of the housed panel 4 is guided into the panel housing groove 14a from the lower end and pulled up along the panel housing groove 14a, the lower panel connected by the link mechanism 21 is obtained. The pieces 20 are sequentially pulled up along the panel receiving grooves 14a to form the planar panel 4 in a wide use state.
The illustrated link mechanism 21 is schematically shown as an example, and is not limited to this mechanism. In short, in use, each panel piece 20 is a single panel that is connected in the vertical direction (however, there is no problem if there is a slight gap). What is necessary is just to be connected so that the accommodation state arranged in the front-back direction can be taken.
In the embodiment, guides 27 for smoothly guiding the panel piece 20 to the panel receiving groove 14a are provided on both side portions of the panel piece 20. This guide 27 has an L-shaped cross-section member (see FIG. 13) formed on one side of a parallelogram (see FIG. 14) by welding to the side plate 23, and a pin of the link mechanism 21 at the center of the parallelogram. 25 is inserted.
[0021]
A panel receiver 30 is provided on the front side of each column base 2 so as to extend forward in the downward slope. As shown in FIG. 5, the panel receiver 30 is for receiving the panel pieces 20 in a vertical posture and arranged in the longitudinal direction of the fence. The cross section has an inverted T-shape, and the inverted T has an upward vertical direction. The part 30a is a partition between adjacent spans. Further, a plate-shaped column support 31 for receiving the column 3 in a horizontal storage state as shown in FIGS. 4 and 5 is welded and fixed to the upward vertical portion 30a. A stopper 32 is provided at the lower end of the panel receiver 30 to prevent the panel piece 20 from sliding off the panel receiver 30.
[0022]
In addition, the breakwater fence 1 of the embodiment includes a fixed panel 33 for fixing the lower opening between the left and right column bases 2 (see FIG. 1), and further, between the fixed panel 33 and the panel 4. An auxiliary panel piece 34 is integrally fixed to the lower end edge of the lowermost panel 4 in order to close a slight gap generated therebetween.
[0023]
When the road is subject to high waves during a typhoon, the above-described breaker fence 1 stands upright with the pillar 3 vertically as shown in FIGS. 13a and the columnar base 2 are inserted into the locking holes 8a of the reinforcing ribs 8 and tightened with nuts to lock in a vertical state, and the panel 4 is used in a state of being disposed between the columns 3. In addition, the upper end part (uppermost panel piece 20) of the panel 4 is locked to the support column 3 by a locking mechanism (not shown), and each lower panel piece 20 is suspended. A wide surface is stretched between the left and right support columns 3.
In this case, the column main body 13 is an H-shaped steel having sufficient rigidity, and the lower end of the column main body 13 contacts the vertical surfaces 6a and 7b of the column base front and rear portions 6 and 7 of the column base 2 having a sufficiently high rigidity. Therefore, the column 3 can withstand a sufficiently large wave pressure.
Since each panel piece 20 constituting the panel 4 uses a lightweight and lightweight steel sheet pile having a large rigidity, and is housed in the panel housing groove 14a so that both ends are received by the front surface of the column body 13, sufficient Can withstand large wave pressures.
The breakwater fence 1 according to the embodiment has a span (column spacing) of 2.0 m and a height of 5.0 m and can withstand a wave pressure of 4.07 tons / m ² and a wind pressure of about 151 kg / m ^2. It is a structure that can.
The fixed panel 33 fixed between the column bases 2 prevents high waves from entering the road from the lower opening of the panel 4. The auxiliary panel piece 34 fixed to the lower edge of the lowermost panel piece 20 prevents high waves from entering between the panel 4 and the fixed panel 33.
[0024]
At a time when there is no possibility of suffering high waves, the panel locking mechanism (not shown) is released, and the panel 4 is pulled downward along the panel housing groove 14 a of the column 3. In this case, when the lowermost panel piece 20 is pulled out from the panel receiving groove 14a, the lower panel pieces 20 are sequentially placed on the panel receiver 30 in the longitudinal direction by the action of the link mechanism 21 (in FIG. 5). It is stored in the storage state side by side. Since the panel pieces 20 are arranged in the longitudinal direction of the fence in a vertical state, the space occupied in the longitudinal direction of the fence in the housed state can be reduced.
Next, the locking bolt 36 is removed, and the column 3 is rotated around the support bolt 10 in the fence width direction. Until the column 3 is tilted to a certain inclination angle, the front and rear surfaces of the column main body 13 made of H-shaped steel come into contact with the vertical surfaces 6a and 6b of the column base front and rear portions 6 and 7 and rotate in the rail width direction. However, the column 3 is then tilted in a direction having a horizontal angle θ (see FIG. 6) with respect to the fence width direction. In this case, since the horizontal angle direction vertical surfaces 6b, 7b are formed on the inner side surfaces of the column base front and rear portions 6, 7, the column 3 can be inclined in the horizontal angle θ direction, and the horizontal angle direction vertical surface 6b. , 7b, and the support column 3 can be placed horizontally as shown in FIGS.
In this case, the deformed shaft hole 17a on the support column 3 through which the support bolt 10 is passed has an oval cross section in which the front end side has a circular cross section and the rear end side extends downward. The twisting toppling operation is possible. In this way, the support column 3 does not fall down horizontally in the fence width direction and becomes horizontal, but finally faces in the direction having the horizontal angle θ, so that the support columns 3 of adjacent spans can be stored without overlapping. The top position of the support column 3 in the stored state can be lowered. In this stored state, the top positions of the columns 3 and the panel pieces 20 can be set to about 1 m from the road surface, for example.
Thus, since the back of the support | pillar 3 and the panel 4 can be made low enough at the time of non-use, the shade fence 1 of the said accommodation state does not produce a shade in the wide range which becomes obstructive.
[0025]
At the time of use, first, the support column 3 is erected vertically by the operation opposite to that described above from the stored state of FIGS. In this case, the support column 3 is raised to a certain inclination angle while maintaining the horizontal angle θ direction, and then the support column 3 is rotated horizontally by the horizontal angle θ and directed in the width direction of the fence. Rotate in the fence width direction and stand vertically. Next, the locking bolts 36 are inserted into the locking holes 13a of the column main body 13 and the locking holes 8a of the reinforcing ribs 8 of the column base 2 and tightened with nuts to lock in the vertical state.
Next, when the uppermost panel piece 20 of the panel pieces 20 placed side by side on the panel receiver 30 is guided from the lower end portion into the panel accommodating groove 14a of the support column 3 and pulled up, the remaining panel pieces 20 are linked. 21 is pulled up sequentially in the panel receiving groove 14 a by 21 to form a wide planar panel 4.
The specific means for pulling up the panel piece 20 was not particularly mentioned. For example, a pulley was attached to the upper end of the support column 3, a wire rope passed through the pulley was attached to the uppermost panel piece 20, and the wire rope was pulled. Various methods such as a method of pulling up the panel piece 20 and the like can be adopted. It should be noted that human power is sufficient if it can be performed manually.
[0026]
The panel piece 20 is not limited to the one using the lightweight steel sheet pile as in the embodiment, and other corrugated plates such as a deck plate and other appropriate materials can be used. Moreover, the number of the panel pieces 20 which comprise the panel 4 is not restricted to 8 sheets of embodiment, but is arbitrary. Moreover, although the retractable fence of this invention is suitable for applying to a wave-breaking fence, a use is not specifically limited.
[0027]
【The invention's effect】
According to the present invention, since the panel can be detached from the support column and the support column attached to the fixed column base can be brought down, the panel and the support column can be stored in a short state when not in use. When installed along the road, the scenery from the traveling vehicle can be secured.
Also, since the column is attached to the column base by a twisting and falling structure that falls in the fence width direction from an upright state to an appropriate inclination angle, and then falls in a direction having a horizontal angle with respect to the fence width direction, When not in use, the panel and the support can be stored in a short state. Therefore, the struts of adjacent spans can be tilted horizontally so as not to overlap each other, and the top position of the struts in the stored state can be sufficiently lowered.
Although the column itself attached to the column base can be stored in a sufficiently short storage state as described above, it is single and not divided into a plurality of pieces, so it is easy to ensure high rigidity, and the wave prevention It is suitable when a fence such as a fence that acts on a large load is made to be a collapsible structure. In addition, since high rigidity can be easily secured, a high break fence that does not get over high waves can be easily manufactured. This point is also suitable for application to a break fence.
In addition, the entire structure of the fence can be manufactured at low cost because it is a simple structure, although it can be stored in a sufficiently short storage state.
[0028]
According to a second aspect of the present invention, in the lower part of the support column, a deformed shaft hole having a substantially oval cross section in which one end side in the front-rear direction of the fence has a substantially circular cross section and the other end side extends downward, and the support shaft that supports the support column is provided. According to the twisting and falling structure that is passed through the deformed shaft hole, it is possible to easily realize the operation of the support column falling in the fence width direction and then in the direction having the horizontal angle with a simple structure.
[0029]
If the fence width direction vertical surface and the horizontal angle direction vertical surface are formed on the inner side surfaces of the column base front part and the column base rear part as in claim 3, the support column falls down in the fence width direction and then horizontal with a simple structure. It is possible to easily realize a twisting and falling operation that falls in a direction having a corner.
[0030]
As in claim 4, the panel is constructed by connecting a plurality of horizontally long panel pieces up and down sequentially by means of a link mechanism, and this link mechanism is stored in a manner that each panel piece is arranged in the longitudinal direction of the fence in a generally vertical posture. If the mechanism is designed to take a state, the panel can be in a compact storage state.
[0031]
As in claim 5, according to the link mechanism that connects the vicinity of the upper end of the lower panel piece and the vicinity of the middle of the upper panel piece in the height direction, or vice versa, each panel piece is approximately A mechanism that takes the storage state in the vertical direction in the longitudinal direction of the fence can be realized with a simple mechanism.
[0032]
When a panel receiver that extends downward or forward is provided on the front surface or rear surface of each column base as in claim 6, coupled with the action of the link mechanism that connects the panel pieces. Protrusion of the panel piece in the longitudinal direction of the fence can be minimized.
[0033]
When the column support is attached to the panel receiver so as to receive the column in a substantially horizontal storage state, the column can be held in a horizontal storage state with a simple structure.
[0034]
According to the eighth aspect of the present invention, the strut includes an H-shaped cross-section main body, the lower part of which is accommodated between and supported by the front and rear portions of the column base, and a T-section member is fixed to the front or rear surface of the post main body by welding. Therefore, it is easy to obtain a structure in which the panel piece can be pulled out and pulled in.
[0035]
According to the ninth aspect, the fixed panel provided between the left and right column bases can reliably prevent the passage of waves.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a front view of a useable state of a retractable fence applied as a wavebreak fence.
FIG. 2 is a right side view of FIG.
3 is a plan view of FIG. 1. FIG.
FIG. 4 is a front view of the retractable fence in a stored state.
FIG. 5 is a right side view of FIG. 4;
FIG. 6 is a plan view of FIG. 4;
7 is a perspective view showing a main part of the retractable fence in the use state of FIG. 1; FIG.
8 is an enlarged view of a main part of the column base in FIG.
FIG. 9 is a plan view of a column base part in a use state for explaining a twisting and falling structure in which the lower part of the column is attached to the column base so as to be able to be twisted and overturned;
10 is a cross-sectional view taken along the line AA in FIG.
11 is a sectional view taken along line BB in FIG.
12 is a view corresponding to FIG. 9 and a plan view of a column base portion in a non-use state. FIG.
FIG. 13 is a plan view showing an engagement structure between a panel and a column and a link mechanism for connecting panel pieces to each other.
14 is a cross-sectional view taken along the line CC of FIG.
15 is a sectional view taken along the line DD of FIG.
[Explanation of symbols]
1 Foldable fence (break fence)
2 Column base 2a Column lower end accommodation space 3 Column 4 Panel 5 Twist overturning structure 6 Column base front part 7 Column base rear part 6a, 7a Rail width direction vertical surface 6b, 7b Horizontal angle direction vertical surface 6c, 7c Bolt insertion hole 8 Reinforcement Rib 8a Locking hole 10 Support bolt (support shaft)
13 Column body 14 Panel housing portion 14a Panel housing groove 16 Guide plate 17 Modified taper tube 17a Modified shaft hole 20 Panel piece 21 Link mechanism 22 Light steel sheet pile 23 Side plate 24, 25 Pin 26 Link 27 Guide 30 Panel receiver 31 Column receiver 32 Stopper 33 Fixed panel 34 Auxiliary panel piece 36 Locking bolt

Claims

A column base that has a column base front part and a column base rear part that forms the support space for the column bottom part, and is fixed to the ground with a space between them. A support shaft that is rotatably supported by the column base with a support shaft that passes between the sections, and a panel that is detachably mounted between the left and right support columns. A tiltable fence that is attached to the column base by a torsional fall structure that falls in the direction of the fence width up to the inclination angle of, and then falls in a direction having a horizontal angle with respect to the width direction of the fence.

Formed in the lower part of the pillar is a deformed shaft hole having a generally circular cross section at one end in the longitudinal direction of the fence and a generally elliptical cross section extending downward at the other end. The retractable fence according to claim 1 characterized by things.

The inner surfaces of the front part of the column base and the rear part of the column base each have a vertical surface in the width direction of the fence that sandwiches the front and rear surfaces of the lower part of the support column. 2. The collapsible fence according to claim 1, wherein a vertical vertical surface is formed that allows the column to be twisted and overturned when tilted further than the tilt angle.

The panel is configured by connecting a plurality of horizontally long panel pieces one above the other by a link mechanism, and the link mechanism is configured so that each panel piece has a generally vertical posture in the longitudinal direction of the fence when the panel is removed from the column. 2. The collapsible fence according to claim 1, wherein adjacent panel pieces are connected to each other so that the storage state can be taken.

The link mechanism for connecting adjacent panel pieces in the vertical direction is configured by connecting the vicinity of the upper end of the lower panel piece and the vicinity of the middle of the upper panel piece in the height direction or vice versa. The retractable fence according to claim 4, wherein

The collapsible fence according to claim 1 or 3, wherein a panel support is provided on a front surface or a rear surface of each column base so as to extend forward or rearward of the fence with a downward slope.

The collapsible fence according to claim 6 , wherein a column support for receiving the column in a substantially horizontal storage state is attached to the panel receiver.

The supporting column has an H-shaped column main body that is supported between and supported by the lower part of the column base and a panel storage unit that is formed by welding and fixing a T-section member to the front or rear surface of the column main body. The retractable fence according to claim 1 or 3, characterized by comprising:

The retractable fence according to claim 1, wherein a fixed panel is fixed between the left and right column bases.