JP3912839B2

JP3912839B2 - Covered scaffolding board

Info

Publication number: JP3912839B2
Application number: JP8224997A
Authority: JP
Inventors: 許弘中尾
Original assignee: 株式会社ナカオ
Priority date: 1997-03-14
Filing date: 1997-03-14
Publication date: 2007-05-09
Anticipated expiration: 2017-03-14
Also published as: JPH10252262A

Description

【０００１】
【発明の属する技術分野】
本発明は、建築・土木作業現場や一般家庭において、外装作業や内装作業のために足場を構築する際に用いられる有蓋足場板に関する。
【０００２】
【従来の技術】
従来、上記した目的に供される足場構造として、図１５に示すように、落下事故等の防止のため、内側から階段を昇降可能な構成を有する足場構造Ｃがある。
図示するように、かかる足場構造Ｃは、それぞれ前後方向に配設された二対の前、後垂直支柱９０、９１及び９２、９３を左右方向に間隔を開けて配設すると共に、前、後垂直支柱同士９０、９１及び９２、９３を、上下方向に間隔を開けて配設された複数の水平連結部材９４、９５によって連結し、かつ、水平連結部材９４、９５とその下方に位置する補助水平連結部材９４ａ、９５ａを、足場構造Ｃの前後に配列されたブレース９７、９８及び９９、１００によってたすき掛けで連結することによって構成されている。
【０００３】
水平連結部材９４、９５には前、後足場板１０１、１０２の両端が着脱自在に掛止されており、前足場板１０１の一長手方向端部には昇降用開口１０３が設けられており、昇降用開口１０３は蓋１０４によって開閉される。
図１５に示すように、上記構成を有する足場構造Ｃの左右側部には、垂直梯子１０９、１１０が設けられている。即ち、各垂直梯子１０９、１１０は、それぞれ、水平連結部材９４、９５と、その下方に位置する補助水平連結部材９４ａ、９５ａ同士を連結する垂直梯子部材１０５、１０６と、これらの垂直梯子部材１０５、１０６と前垂直支柱９０、９２との間に上下方向に間隔を開けて取付けられる複数の水平梯子部材１０７、１０８とから形成される。一方、最下段の垂直梯子部材１０５、１０６と後垂直支柱９１、９３との間には作業者出入口１１１、１１２が設けられている。
【０００４】
かかる構成によって、図１５及び図１６に示すように、作業者Ｗは、例えば、作業者出入口１１２より足場構造Ｃの内部空間に入り、垂直梯子１１０を内側から昇ると共に蓋１０４を開け、昇降用開口１０３をくぐり抜けて前足場板１０１上に立ち、その後、蓋１０４を閉じて、所望の高所作業を行うことができる。このように、作業者Ｗは、垂直梯子１１０を内側から昇るので、万一落下しても落下高さが低いので、落下事故を可及的に少なくかつ軽微なものとすることできる。
【０００５】
【発明が解決しようとする課題】
しかし、上記した従来の足場構造Ｃは、未だ、以下の解決すべき課題を有していた。
即ち、図１５及び図１６に示すように、昇降用開口１０３の形状は、前足場板１０１の長手方向端部の形状に合わせて矩形形状をなしている。従って、作業者Ｗが垂直梯子１１０を内側から昇ると共に蓋１０４を開け、昇降用開口１０３をくぐり抜けて前足場板１０１上に立つ際に、足Ｆを、狭幅の左右方向蓋枠１１３と前後方向蓋枠１１４とから形成されるＬ字形状の狭隘な角部１１５に載せなくてはならず、作業者Ｗの前足場板１０１間の上昇動作を不安定なものとし、足を滑らす等の落下事故の原因ともなっていた。このことは、作業者Ｗの前足場板１０１間の下降動作においても同様であった。
【０００６】
なお、図１７に示すように、実開平６−３２５７６号公報に、足場板１１６の中央部に、蓋１１８によって開閉される昇降用開口１１７を設け、垂直梯子１１９を通して足場板１１６間を昇降することができる足場構造Ｄが提示されている。しかし、この場合も、昇降用開口１１７が横長矩形形状を有するため、垂直梯子１１９を登り、上り時に昇降用開口１１７をくぐり抜けて足場板１１６上に立つ際に、足の前半部を足場板１１６の一側側縁から空中に突出しなければならず、作業者の足場板１１６間の上昇動作を不安定なものとし、足を滑らす等の落下事故の原因ともなっていた。このことは、作業者の足場板１１６間の下降動作においても同様であった。さらに、足場板１１６の中央部に昇降用開口１１７を設けることによって、足場板１１６の機械的強度を低下させることにもなっていた。
【０００７】
また、従来の足場板１０１、１１６においては、昇降用開口１０３、１１７の形成と蓋１０４、１１８の製作は全く別個に行われており、昇降用開口１０３、１１７を形成するに際して切り抜かれる切り抜き板の有効利用は何ら図られていなかった。
【０００８】
本発明は、このような事情に鑑みなされたものであり、昇降用開口を通して上方の足場板に立つ際に、作業者が不安感を抱くことなく安全に足場板間を昇降できる有蓋足場板を提供することを目的とする。
【０００９】
【課題を解決するための手段】
前記目的に沿う請求項１記載の有蓋足場板は、横長矩形形状の矩形枠の上面に天板が取付けられ、該矩形枠の両長手方向端部にそれぞれ掛止金具が突出して取付けられ、しかも、昇降用開口と該昇降用開口を開閉する蓋が長手方向端部に設けられている有蓋足場板において、
該有蓋足場板の長手方向端部に角部を残して前記昇降用開口が設けられ、前記角部上に足載せ部が形成され、
前記昇降用開口に蓋載置用鍔部が設けられ、該蓋載置用鍔部にロック機構を介して前記蓋が着脱自在に掛止され、前記ロック機構が、前記蓋の周縁部に揺動自在に取付けられると共にスプリングの付勢力によって前記蓋載置用鍔部に自動的に掛止されるストッパーを具備し、かつ、該ストッパーの上部と下部に、それぞれ、該ストッパーと前記蓋載置用鍔部との掛止を解除するための上部摘まみレバーと下部押圧レバーとが一体的に取付けられている。
【００１０】
請求項２記載の有蓋足場板は、請求項１記載の有蓋足場板において、前記昇降用開口の形状を長軸が前記有蓋足場板の長手方向に伸延する長円形としている。
請求項３記載の有蓋足場板は、請求項１記載の有蓋足場板において、前記昇降用開口の形状を長軸が前記有蓋足場板の長手方向に伸延する楕円形としている。
請求項４記載の有蓋足場板は、請求項１記載の有蓋足場板において、前記昇降用開口の形状を長軸が前記有蓋足場板の長手方向に伸延する多角形としている。
【００１１】
請求項５記載の有蓋足場板は、請求項１〜４のいずれか１項に記載の有蓋足場板において、横長の矩形枠の上面に、下面に補強リブを具備する天板を取付けることによって構成される無蓋足場板の一部を切り抜くことによって、前記昇降用開口が形成される。
請求項６記載の有蓋足場板は、請求項５記載の有蓋足場板において、前記昇降用開口の切り抜き片が該昇降用開口の蓋用天板として用いられる。
【００１２】
【発明の実施の形態】
続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
【００１３】
図１〜図３を参照して、本発明の一実施の形態に係る有蓋足場板の構成について説明する。
図１に示すように、有蓋足場板Ａは、その後部に並設されている無蓋足場板Ａ１と共に、実質的に、足場構造Ｂの一部として形成されている。有蓋足場板Ａは、無蓋足場板Ａ１と同様に、好ましくはアルミニウム合金製とする。また、有蓋足場板Ａは、足場構造Ｂの一部として用いられるのみでなく、単一物として製造され、市場で販売され得るものであることはいうまでもない。
【００１４】
まず、足場構造Ｂの全体構成について、図１を参照して説明する。
図示するように、足場構造Ｂは、それぞれ前後方向に配設された二対の前、後垂直支柱１０、１１及び１２、１３を左右方向に間隔を開けて配設すると共に、前、後垂直支柱同士１０、１１及び１２、１３を、上下方向に間隔を開けて配設された複数の水平連結部材１４、１５によって連結し、かつ、水平連結部材１４、１５とその下方に位置する補助水平連結部材１４ａ、１５ａ同士を、足場構造Ｂの前後に配列されたブレース１６、１７及び１８、１９によってたすき掛けで連結することによって構成されている。
【００１５】
水平連結部材１４、１５には、有蓋足場板Ａの両端と、同様な形状を有する無蓋足場板Ａ１の両端が、掛止金具２０、２１及び２２、２３によって着脱自在に掛止されている。また、有蓋足場板Ａの一長手方向端部には昇降用開口２４が設けられており、この昇降用開口２４は蓋２５によって開閉される。
水平連結部材１４、１４間、及び１５、１５間には、垂直梯子３０、３１が取付けられている。即ち、垂直梯子３０、３１は、それぞれ水平連結部材１４、１５とその下方に位置する補助水平連結部材１４ａ、１５ａを連結する垂直梯子部材２６、２７と、これらの垂直梯子部材２６、２７と前垂直支柱１０、１２との間に上下方向に間隔を開けて取付けられる複数の水平梯子部材２８、２９とから形成される。一方、最下段の垂直梯子部材２６、２７と後垂直支柱１１、１３との間には作業者出入口３２、３３が設けられている。
【００１６】
かかる構成によって、図１及び図１１に示すように、作業者Ｗは、例えば、作業者出入口３３より足場構造Ｂの内部空間に入り、垂直梯子３１を内側から昇ると共に蓋２５を開け、昇降用開口２４をくぐり抜けて有蓋足場板Ａ上に立ち、その後、蓋２５を閉じて、所望の高所作業を行うことができる。このように、作業者Ｗは、垂直梯子３１を内側から昇るので、万一落下しても落下高さが低いので、落下事故を可及的に少なくかつ軽微なものとすることできる。
【００１７】
本実施の形態は、上記した構成を有する足場構造Ｂの構築に用いられる有蓋足場板Ａにおいて、長手方向端部に角部を残して昇降用開口２４が設けられ、この角部上に足載せ部３４、３５が形成されていることに特徴を有する。
【００１８】
まず、有蓋足場板Ａの全体構成について説明すると、図２〜図６に示すように、有蓋足場板Ａは、実質的に、前、後枠部材４０、４１と、左、右枠部材４２、４３からなる横長の矩形枠４４と、矩形枠４４の上面に取付けられる同一形状の横長の天板４５とからなり、矩形枠４４は内側に向けて開口するチャンネル部材から形成されている。なお、本実施の形態では、有蓋足場板Ａは、図５を参照して後述するように、前、後枠部材４０、４１と天板４５の半分とが一体成形された一対のアルミ押し型材６３、６４を用いることによって、後述するように容易に製作することができる。
【００１９】
図３及び図５に示すように、天板４５の裏面には、補強リブの一例である２つの縦補強リブ４６、４７と、同様に補強リブの一例である２つの横補強リブ４８、４９とがそれぞれ縦横方向に伸延自在に取付けられている。
また、図２〜図４に示すように、有蓋足場板Ａの両端にはＣ形状の湾曲板部材からなる掛止金具２０、２１が取付けられており、それぞれ、水平連結部材１４、１５に着脱自在に連結されている。
【００２０】
上記した構成を有する有蓋足場板Ａにおいて、本実施の形態では、図１〜図３及び図１１に示すように、有蓋足場板Ａの一端には、長手方向に長軸を有する長円形の昇降用開口２４と、この昇降用開口２４を開閉するための同様に長円形を有する蓋２５が設けられている。
昇降用開口２４は、図６及び図１１に示すように、天板４５の一長手方向端部を長円形に切欠して開口すると共に、天板４５の下面に、この切欠開口の長円形縁部５０に沿って長円形の環状周壁５２を溶接やリベット等によって連結することによって形成される。
【００２１】
環状周壁５２は、外側に向けて開口するチャンネル部材からなる環状の補強枠５３と、補強枠５３の内周面の中間位置に突設される板材からなる環状の蓋載置用鍔部５４とから形成されている。なお、補強枠５３と蓋載置用鍔部５４とは、一体的に引抜成形することによって製作することができる。
図２及び図６に示すように、長円形を有する蓋２５は、内側に向けて開口するチャンネル部材からなる環状の補強枠５５と、補強枠５５の上面に溶接やリベット等で固着される蓋用天板５６とから形成されている。
【００２２】
補強枠５５は昇降用開口２４を形成する環状周壁５２の内面に設けられた蓋載置用鍔部５４上に載置されており、その高さは、昇降用開口２４を形成するための補強枠５３の高さの略２分の１に設定されている。従って、蓋２５によって昇降用開口２４を閉じた際、蓋２５の上面を有蓋足場板Ａの天板４５の上面と面一にすることができる。
蓋用天板５６の下面には、２つの縦補強リブ５７、５８が取付けられている。
【００２３】
また、図２及び図１１に示すように、蓋用天板５６の一側面は、一対のヒンジ５９、６０によって、昇降用開口２４を形成する補強枠５３の対応する個所に枢支連結されており、一方、その他側面は、掛止自在なロック機構６１によって、昇降用開口２４を形成する蓋載置用鍔部５４の対応する個所に着脱自在に掛止されている。
【００２４】
このように昇降用開口２４と蓋２５とを長円形にすることによって、図１〜図３及び図１１に示すように、昇降用開口２４の内周縁を形成する環状周壁５２と有蓋足場板Ａの長手方向端部の角部外周縁との間に形成される角部上に略三角形状の足載せ部３４、３５が形成されることになる。
従って、図１１に示すように、作業者Ｗが垂直梯子３１を内側から昇ると共に蓋２５を開け、昇降用開口２４をくぐり抜けて有蓋足場板Ａ上に立つ際に、足６２を、十分な広さの足載せ面積を有する足載せ部３４、３５、特に、足載せ部３４上に載せることができるので、作業者Ｗは不安感を抱くことなく安全に有蓋足場板Ａ間を昇降することができる。
【００２５】
なお、昇降用開口２４は、上記した長円形に何ら限定されるものではなく、例えば、図１２〜図１４に模式的に示す形状とすることもできる。
即ち、図１２においては、昇降用開口２４ａと、この昇降用開口２４ａを開閉する蓋２５ａが、共に、楕円形を有する構造としている。
図１３においては、昇降用開口２４ｂと、この昇降用開口２４ｂを開閉する蓋２５ｂが、共に、多角形を有する構造としている。
図１４においては、昇降用開口２４ｃと、この昇降用開口２４ｃを開閉する蓋２５ｃが、共に、一側側縁のみを弧状とした構造としている。
【００２６】
かかる構成によっても、有蓋足場板Ａ２〜Ａ４の長手方向端部に、十分な広さの足載せ面積を有する足載せ部３４ａ、３５ａ、３４ｂ、３５ｂ、３４ｃを形成することができ、これらの足載せ部３４ａ、３５ａ、３４ｂ、３５ｂ、３４ｃ上に足を載せることができるので、作業者Ｗは不安感を抱くことなく安全に有蓋足場板Ａ２、Ａ３、又はＡ４間を昇降することができる。
【００２７】
また、本実施の形態に係る有蓋足場板Ａは、以下の構成にも特徴を有する。
即ち、本実施の形態では、図１に示すように、無蓋足場板Ａ１は、昇降用開口２４と蓋２５が設けられていない点を除いて有蓋足場板Ａと全く同一の構成を有している。
【００２８】
従って、図５及び図６に示すように、有蓋足場板Ａにおける蓋２５の蓋用天板５６は、無蓋足場板Ａ１の天板４５と、縦補強リブ４６、４７と共に切り抜くことによって得られる切り抜き片によって容易に形成することができる。そして、この切り抜き片からなる蓋用天板５６の周縁に補強枠５５を取付けることによって容易に蓋２５を形成することができる。また、蓋用天板５６の下面には、上記した切り抜き動作によって、縦補強リブ４６、４７の切り抜き片から形成される縦補強リブ５７、５８が一体的に取付けられることになる。
【００２９】
また、無蓋足場板Ａ１の天板４５から蓋２５の蓋用天板５６と縦補強リブ４６、４７と共に切り抜いた後の長円形縁部５０の下面に環状周壁５２を連結することによって、容易に有蓋足場板Ａの昇降用開口２４を形成することができる。
このように、本実施の形態では、無蓋足場板Ａ１の天板４５を切り抜いた切り抜き片を、有蓋足場板Ａにおける蓋２５の蓋用天板５６として有効利用することができると共に、同一形状の昇降用開口２４も容易に形成することができるので、有蓋足場板Ａを歩留りよく、しかも安価に製作することができる。
【００３０】
さらに、図示の実施の形態に係る有蓋足場板Ａ及び足場構造Ｂの構成におけるその他の構成上の特徴について以下説明する。
図５に示すように、本実施の形態では、有蓋足場板Ａの前、後枠部材４０、４１と天板４５の半分とが一体成形された一対のアルミ押し型材６３、６４の当接する側縁部にそれぞれ下方伸延壁６３ａ、６４ａの基部を連設し、下方伸延壁６３ａ、６４ａの先部を左右対称に外側に向けて屈曲し屈曲部６３ｂ、６４ｂによってＹ字状係合部を形成し、このＹ字状係合部をΩ状係合部材６５に嵌入した後、Ω状係合部材６５を押圧変形してＹ字状係合部をかしめるようにしている。従って、強固に一体化された広幅の有蓋足場板Ａを容易に製作することができる。
【００３１】
無蓋足場板Ａ１も蓋２５を具備しないことを除いて有蓋足場板Ａと同一の構成を有しており、従って、無蓋足場板Ａ１もＹ字状係合部とΩ状係合部材６５との係合によって同様に容易に製作されることになる。
【００３２】
図７〜図１０に、蓋２５を昇降用開口２４に開閉自在にロックするためのロック機構６１を示す。
図示するように、ロック機構６１は、蓋用天板５６の前端に固着されるストッパー受け金７０と、ストッパー受け金７０に上下方向に揺動自在に取付けられるストッパー７１と、ストッパー受け金７０とストッパー７１との間に介設されるスプリングの一例であるヒンジばね８５とから構成される。
【００３３】
即ち、図１０に示すように、ストッパー受け金７０は、実質的に、その前部が蓋用天板５６の補強枠５５内に嵌入される横長矩形の垂直板からなる受け金本体７２と、受け金本体７２の上部から一側方に向けて伸延する状態で連設されると共に蓋用天板５６の裏面に連結ボルト７３によって連結される横長矩形の水平板からなる取付部材７４と、受け金本体７２の下部から他側方に向けて伸延する状態で連設される横長矩形の小水平板からなるストッパー受け部材７５とから構成される。
【００３４】
また、受け金本体７２の前部には、ストッパー７１の前部を、後述する枢支ボルト８６を用いて上下方向に揺動自在に枢支するための枢支孔７６が設けられている。一方、受け金本体７２の中央部には、後述するスプリングの一例であるヒンジばね８５の一端部８５ａを掛止するための第１の掛止孔７７が設けられている。さらに、取付部材７４には、連結ボルト７３を挿通するためのボルト挿通孔７８が設けられている。
【００３５】
一方、ストッパー７１は、図１０に示すように、実質的に、その前部が蓋用天板５６の補強枠５５内に嵌入される横長矩形の垂直板からなるストッパー本体７９と、ストッパー本体７９の下面に連設される側面視でＬ字状の鍔部掛止片８０と、ストッパー本体７９の後部上面から一側方に向けて伸延する状態で連設される矩形の水平板からなる上部摘まみレバー８１と、鍔部掛止片８０の後端に一側方に向けて伸延する状態で連設される矩形の垂直板からなる下部押圧レバー８２とから構成される。上記構成において、鍔部掛止片８０の下縁には円弧状の鍔部摺動接触面８０ａが形成されている。
【００３６】
また、ストッパー本体７９の前部には、ストッパー７１の前部を上下方向に揺動自在に枢支するための枢支孔８３が設けられている。一方、ストッパー本体７９とＬ字状の鍔部掛止片８０との連設部には、後述するヒンジばね８５の他端部８５ｂを掛止するための第２の掛止孔８４が設けられている。
【００３７】
図７〜図９に示すように、上記したストッパー受け金７０と、ストッパー７１と、ヒンジばね８５を用いてロック機構６１を組み立てるに際しては、まず、ストッパー受け金７０の受け金本体７２の前部を補強枠５５の内部に挿入すると共に、その取付部材７４を連結ボルト７３によって蓋用天板５６に連結して、ストッパー受け金７０を蓋２５の前部に一体的に取付ける。
【００３８】
次に、図７に示すように、ストッパー７１をストッパー受け金７０に並設させると共に、ヒンジばね８５をストッパー７１とストッパー受け金７０との間に介設し、その状態を保持しながら、図７及び図１０に示すように、枢支ボルト８６を、ストッパー７１の枢支孔８３と、ヒンジばね８５の環状枢支部８５ｃと、ストッパー受け金７０の枢支孔７６に順次挿通した後、挿通端にナット８７を螺着する。
【００３９】
その後、ヒンジばね８５の他端部８５ｂをストッパー７１に設けられた第２の掛止孔８４に掛止すると共に、ヒンジばね８５の一端部８５ａをストッパー受け金７０の第１の掛止孔７７に掛止することによってロック機構６１を形成することができる。
【００４０】
かかる構成において、蓋２５の閉蓋時には、図７及び図８に示すように、ヒンジばね８５の弾性力によって、ストッパー７１には、枢支ボルト８６周りに時計方向の回転モーメントが常時付与されることになり、この回転モーメントによって、鍔部掛止片８０が自動的に蓋載置用鍔部５４に掛止されることになり、容易かつ確実に蓋２５を昇降用開口２４にロックすることができる。なお、ストッパー７１の過回転はストッパー受け部材７５によって防止することができる。
【００４１】
一方、下の有蓋足場板Ａから上の有蓋足場板Ａに昇る際には、下部押圧レバー８２を上方に持ち上げて、蓋２５に枢支ボルト８６周りの反時計方向の回転を与えることによって、鍔部掛止片８０と蓋載置用鍔部５４との掛止を解除することができ、その後、蓋２５を上方に持ち上げることによって容易に下の有蓋足場板Ａから上の有蓋足場板Ａに移動することができる。
【００４２】
また、上の有蓋足場板Ａから下の有蓋足場板Ａに降りる際には、上部摘まみレバー８１を、蓋用天板５６に設けた矩形形状の開口８８を通して摘んで上方に持ち上げて、蓋２５に枢支ボルト８６周りの反時計方向の回転を与えることによって、鍔部掛止片８０と蓋載置用鍔部５４との掛止を解除することができ、その後、蓋２５を上方に持ち上げることによって容易に上の有蓋足場板Ａから下の有蓋足場板Ａに移動することができる。
【００４３】
上記した開蓋作業を終了した後は、通常、蓋２５を閉じる必要があるが、本実施の形態では、ストッパー７１の鍔部掛止片８０の下縁には円弧状の鍔部摺動接触面８０ａが形成されている。従って、蓋２５の閉動作に伴い、蓋載置用鍔部５４に鍔部摺動接触面８０ａが摺動しながら接触することになり、いったん、ストッパー７１の鍔部掛止片８０は反時計方向に回転されることになる。その後、死点を越えると、ストッパー７１の鍔部掛止片８０が再度時計方向に回転して蓋載置用鍔部５４に自動的に掛止されることになる。
【００４４】
図２、図３、図５及び図６に示すように、有蓋足場板Ａの天板４５及び蓋用天板５６には、共に、上方に向けて凸の滑り止め用突起６６、６７が設けられており、これらの突起６６、６７の中央部には雨水流出孔６６ａ、６７ａが設けられている。従って、作業者Ｗが有蓋足場板Ａ上で作業する場合の滑りに起因する事故を可及的に防止することができる。また、有蓋足場板Ａの天板４５及び蓋用天板５６には、それぞれ複数の小さな縦溝から形成される滑り防止帯６９、６９ａが設けられている。
【００４５】
図４に示すように、掛止金具２１には公知の着脱掛止機構６８が取付けられており、この着脱掛止機構６８を操作することによって掛止金具２１を容易かつ確実に水平連結部材１５に掛止できると共に、逆の手順で操作することによって容易に解除できる。
【００４６】
以上、本発明を、一実施の形態を参照して説明してきたが、本発明は何ら上記した実施の形態に記載の構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変容例も含むものである。
例えば、上記した実施の形態では、有蓋足場板を構成する矩形枠と天板とは一対のアルミ押し部材をかしめることによって形成したが、３枚以上のアルミ押し部材をかしめることによって有蓋足場板を形成したり、１枚の広幅のアルミ押し部材を用いて形成したり、天板を矩形枠に溶接することによっても形成することができる。また、ここで、矩形枠とは、４辺全てに枠部材を有するのみならず、長手方向側縁に少なくとも枠部材を有するものも含む。さらに、蓋は枢軸周りに上下方向に揺動して開閉するものに限らず、摺動蓋のように、閉蓋位置と開蓋位置との間で水平方向に移動して昇降用開口を開閉することができる蓋を用いることもできる。
【００４７】
【発明の効果】
請求項１〜６記載の有蓋足場板においては、有蓋足場板の長手方向端部に角部を残して昇降用開口が設けられ、この角部上に足載せ部が形成されるようにしている。従って、作業者が垂直梯子を内側から昇ると共に蓋を開け、昇降用開口をくぐり抜けて有蓋足場板上に立つ際に、足を、十分な広さの足載せ面積を有する足載せ部上に載せることができるので、作業者は不安感を抱くことなく安全に有蓋足場板間を昇降することができる。
また、昇降用開口の蓋載置用鍔部にロック機構を介して蓋が着脱自在に掛止され、ロック機構が、蓋の周縁部に揺動自在に取付けられると共にスプリングの付勢力によって蓋載置用鍔部に自動的に掛止されるストッパーを具備し、かつ、ストッパーの上部と下部に、それぞれ、ストッパーと蓋載置用鍔部との掛止を解除するための上部摘まみレバーと下部押圧レバーとが一体的に取付けられている。従って、下の有蓋足場板から上の有蓋足場板に昇る際には、下部押圧レバーを操作してロックを解除した後、蓋を上方に持ち上げることによって容易に下の有蓋足場板から上の有蓋足場板に移動することができ、一方、上の有蓋足場板から下の有蓋足場板に降りる際には、上部摘まみレバーを操作してロックを解除した後、蓋を上方に持ち上げることによって容易に上の有蓋足場板から下の有蓋足場板に移動することができる。即ち、足場構造における昇降移動を円滑に行うことができる。
【００４８】
特に、請求項２記載の有蓋足場板においては、昇降用開口の形状を長軸が有蓋足場板の長手方向に伸延する長円形としたので、容易に十分な広さの足載せ面積を有する足載せ部を有蓋足場板の長手方向端部に形成することができる。
請求項３記載の有蓋足場板においては、昇降用開口の形状を長軸が有蓋足場板の長手方向に伸延する楕円形としたので、容易に十分な広さの足載せ面積を有する足載せ部を有蓋足場板の長手方向端部に形成することができる。
【００４９】
請求項４記載の有蓋足場板においては、昇降用開口の形状を長軸が有蓋足場板の長手方向に伸延する多角形としたので、容易に十分な広さの足載せ面積を有する足載せ部を有蓋足場板の長手方向端部に形成することができる。
請求項６記載の有蓋足場板においては、横長の矩形枠の上面に、下面に補強リブを具備する天板を取付けることによって構成される無蓋足場板の一部を切り抜くことによって昇降用開口を有する有蓋足場板が形成され、切り抜き片を、蓋用天板として用いる。このように、無蓋足場板の天板を切り抜いた切り抜き片を有蓋足場板の蓋用天板として有効利用することができると共に、昇降用開口も容易に形成することができるので、有蓋足場板を歩留りよく、しかも安価に製作することができる。
【００５０】
【００５１】
【図面の簡単な説明】
【図１】本発明の一実施の形態に係る有蓋足場板を具備する足場構造の斜視図である。
【図２】同平面図である。
【図３】同裏面図である。
【図４】同側面図である。
【図５】図２のＩ−Ｉ線による矢視断面図である。
【図６】図２のII−II線による矢視断面図である。
【図７】ロック機構の平面図である。
【図８】ロック機構のロック状態を示す図７のIII-III線による矢視側断面図である。
【図９】ロック機構のロック解除状態を示す図７のIII-III線による矢視側断面図である。
【図１０】ロック機構の分解斜視図である。
【図１１】有蓋足場板の要部拡大平面図である。
【図１２】変容例に係る有蓋足場板の要部模式図である。
【図１３】変容例に係る有蓋足場板の要部模式図である。
【図１４】変容例に係る有蓋足場板の要部模式図である。
【図１５】従来の足場板を具備する足場構造の斜視図である。
【図１６】同足場板の要部拡大平面図である。
【図１７】従来の足場板を具備する足場構造の斜視図である。
【符号の説明】
Ａ有蓋足場板Ａ１無蓋足場板
Ａ２有蓋足場板Ａ３有蓋足場板
Ａ４有蓋足場板Ｂ足場構造
Ｗ作業者１０前垂直支柱
１１後垂直支柱１２前垂直支柱
１３後垂直支柱１４水平連結部材
１４ａ補助水平連結部材１５水平連結部材
１５ａ補助水平連結部材１６ブレース
１７ブレース１８ブレース
１９ブレース２０掛止金具
２１掛止金具２２掛止金具
２３掛止金具２４昇降用開口
２４ａ昇降用開口２４ｂ昇降用開口
２４ｃ昇降用開口２５蓋
２５ａ蓋２５ｂ蓋
２５ｃ蓋２６垂直梯子部材
２７垂直梯子部材２８水平梯子部材
２９水平梯子部材３０垂直梯子
３１垂直梯子３２作業者出入口
３３作業者出入口３４足載せ部
３４ａ足載せ部３４ｂ足載せ部
３４ｃ足載せ部３５足載せ部
３５ａ足載せ部３５ｂ足載せ部
４０前枠部材４１後枠部材
４２左枠部材４３右枠部材
４４矩形枠４５天板
４６縦補強リブ４７縦補強リブ（補強リブ）
４８横補強リブ４９横補強リブ
５０長円形縁部５２環状周壁
５３補強枠５４蓋載置用鍔部
５５補強枠５６蓋用天板
５７縦補強リブ５８縦補強リブ
５９ヒンジ６０ヒンジ
６１ロック機構６２足
６３アルミ押し型材６３ａ下方屈曲壁
６３ｂ屈曲部６４アルミ押し型材
６４ａ下方伸延壁６４ｂ屈曲部
６５ Ω状係合部材６６突起
６６ａ雨水流出孔６７突起
６７ａ雨水流出孔６８着脱掛止機構
６９滑り防止帯６９ａ滑り防止帯
７０ストッパー受け金７１ストッパー
７２受け金本体７３連結ボルト
７４取付部材７５ストッパー受け部材
７６枢支孔７７第１の掛止孔
７８ボルト挿通孔７９ストッパー本体
８０鍔部掛止片８０ａ鍔部摺動接触面
８１上部摘まみレバー８２下部押圧レバー
８３枢支孔８４第２の掛止孔
８５ヒンジばね８５ａ一端部
８５ｂ他端部８６枢支ボルト
８７ナット８８開口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a covered scaffolding plate used when building a scaffold for exterior work or interior work in a construction / civil engineering work site or a general home.
[0002]
[Prior art]
Conventionally, as a scaffold structure provided for the above-described purpose, there is a scaffold structure C having a configuration capable of moving up and down stairs from the inside to prevent a fall accident or the like, as shown in FIG.
As shown in the figure, the scaffold structure C includes two pairs of front and rear vertical struts 90, 91 and 92, 93 disposed in the front-rear direction, spaced apart in the left-right direction, and front and rear. The vertical struts 90, 91 and 92, 93 are connected by a plurality of horizontal connecting members 94, 95 arranged at intervals in the vertical direction, and the horizontal connecting members 94, 95 and auxiliary located below the horizontal connecting members 94, 95 are connected. The horizontal connecting members 94a and 95a are configured to be linked by braces 97, 98 and 99, 100 arranged before and after the scaffold structure C.
[0003]
Both ends of the front and rear scaffold plates 101, 102 are detachably hooked to the horizontal connecting members 94, 95, and a lifting opening 103 is provided at one longitudinal end of the front scaffold plate 101, The elevating opening 103 is opened and closed by a lid 104.
As shown in FIG. 15, vertical ladders 109 and 110 are provided on the left and right sides of the scaffold structure C having the above-described configuration. That is, each of the vertical ladders 109 and 110 includes horizontal connecting members 94 and 95, vertical ladder members 105 and 106 that connect the auxiliary horizontal connecting members 94a and 95a positioned below the horizontal connecting members 94 and 95, and these vertical ladder members 105, respectively. , 106 and the front vertical columns 90, 92 are formed from a plurality of horizontal ladder members 107, 108 which are attached at an interval in the vertical direction. On the other hand, worker entrances 111 and 112 are provided between the lowermost vertical ladder members 105 and 106 and the rear vertical columns 91 and 93.
[0004]
With this configuration, as shown in FIGS. 15 and 16, for example, the worker W enters the internal space of the scaffold structure C through the worker entrance 112, rises the vertical ladder 110 from the inside, opens the lid 104, and moves up and down. It can pass through the opening 103 and stand on the front scaffolding board 101, and then the lid 104 can be closed to perform a desired work at a high place. Thus, since the worker W ascends the vertical ladder 110 from the inside, the height of the fall is low even if it falls, so that the fall accident can be minimized and minimized.
[0005]
[Problems to be solved by the invention]
However, the above-described conventional scaffold structure C still has the following problems to be solved.
That is, as shown in FIGS. 15 and 16, the shape of the lifting opening 103 is a rectangular shape in accordance with the shape of the longitudinal end portion of the front scaffolding plate 101. Therefore, when the worker W ascends the vertical ladder 110 from the inside and opens the lid 104, passes through the lifting opening 103 and stands on the front scaffolding plate 101, the foot F is moved forward and backward with the narrow left and right lid frame 113. It must be placed on an L-shaped narrow corner 115 formed from the directional lid frame 114, and the ascending motion between the front scaffolding plates 101 of the operator W is made unstable, and the foot is slid. It also caused a fall accident. The same applies to the lowering operation between the front scaffolding plates 101 of the worker W.
[0006]
As shown in FIG. 17, Japanese Utility Model Laid-Open No. 6-32576 is provided with a lifting opening 117 that is opened and closed by a lid 118 at the center of the scaffolding plate 116, and moves up and down between the scaffolding plates 116 through a vertical ladder 119. A possible scaffold structure D is presented. However, in this case as well, since the lifting opening 117 has a horizontally long rectangular shape, when climbing up the vertical ladder 119 and passing through the lifting opening 117 and standing on the scaffolding plate 116 when ascending, the front half of the foot is placed on the scaffolding plate 116. It has to project from the side edge of the side into the air, making the ascending motion of the worker's scaffolding plate 116 unstable, and causing a fall accident such as sliding the foot. The same applies to the descending operation between the scaffolding plates 116 of the worker. Furthermore, the mechanical strength of the scaffolding plate 116 is also reduced by providing the lifting opening 117 at the center of the scaffolding plate 116.
[0007]
Further, in the conventional scaffold plates 101 and 116, the lifting openings 103 and 117 and the lids 104 and 118 are formed completely separately, and a cutout plate that is cut out when the lifting openings 103 and 117 are formed. No effective use of was planned.
[0008]
The present invention has been made in view of such circumstances, and has a covered scaffolding plate that allows an operator to safely move up and down between the scaffolding plates without feeling uneasy when standing on the upper scaffolding plate through the lifting opening. The purpose is to provide.
[0009]
[Means for Solving the Problems]
The lidded scaffolding board according to claim 1, which meets the object, has a top plate attached to the upper surface of a rectangular frame having a horizontally long rectangular shape, and latching metal fittings protruding from both longitudinal ends of the rectangular frame, A lifting opening and a lid for opening and closing the lifting opening.At the longitudinal endIn the lidded scaffolding board provided,
Of the covered scaffolding plateThe opening for raising and lowering is provided leaving a corner at the longitudinal end, and a footrest is formed on the corner.,
The elevating opening is provided with a lid mounting collar, and the lid is detachably latched on the lid mounting collar via a lock mechanism, and the lock mechanism is swayed on the peripheral edge of the lid. A stopper that is movably attached and that is automatically hooked to the lid mounting saddle by the biasing force of a spring; and the stopper and the lid mounting on the upper and lower portions of the stopper, respectively. An upper knob lever and a lower pressing lever for releasing the latch with the hook are integrally attached.
[0010]
The covered scaffolding plate according to claim 2 is the covered scaffolding plate according to claim 1, wherein the shape of the lifting opening is an oval whose long axis extends in the longitudinal direction of the covered scaffolding plate.
The covered scaffolding plate according to claim 3 is the covered scaffolding plate according to claim 1, wherein the shape of the lifting opening is an ellipse whose long axis extends in the longitudinal direction of the covered scaffolding plate.
According to a fourth aspect of the present invention, in the covered scaffolding plate according to the first aspect, the shape of the lifting opening is a polygon whose major axis extends in the longitudinal direction of the covered scaffolding plate.
[0011]
The covered scaffolding board according to claim 5 is the covered scaffolding board according to any one of claims 1 to 4, wherein a top plate having reinforcing ribs on the lower surface is attached to the upper surface of the horizontally long rectangular frame. The lifting opening is formed by cutting out a part of the non-covered scaffolding plate.
The covered scaffolding board according to claim 6 is a claim.5In the described covered scaffolding board,The cutout piece of the lifting opening is used as a lid top plate for the lifting opening.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
[0013]
With reference to FIGS. 1-3, the structure of the covered scaffolding board which concerns on one embodiment of this invention is demonstrated.
As shown in FIG. 1, the covered scaffolding plate A is substantially formed as a part of the scaffolding structure B together with the non-covered scaffolding plate A1 arranged in parallel at the rear part thereof. The covered scaffolding plate A is preferably made of an aluminum alloy, like the uncovered scaffolding plate A1. Needless to say, the covered scaffolding plate A is not only used as a part of the scaffold structure B but also manufactured as a single product and sold in the market.
[0014]
First, the overall structure of the scaffold structure B will be described with reference to FIG.
As shown in the figure, the scaffold structure B is provided with two pairs of front and rear vertical struts 10, 11 and 12, 13 disposed in the front-rear direction, spaced apart in the left-right direction, and front and rear vertical. The support columns 10, 11 and 12, 13 are connected by a plurality of horizontal connection members 14, 15 arranged at intervals in the up-down direction, and the horizontal connection members 14, 15 and an auxiliary horizontal located below the horizontal connection members 14, 15. The connecting members 14a and 15a are connected to each other by braces 16, 17 and 18, 19 arranged before and after the scaffold structure B.
[0015]
Both ends of the covered scaffolding plate A and both ends of the non-covered scaffolding plate A1 having the same shape are detachably latched to the horizontal connecting members 14 and 15 by latching metal fittings 20, 21, 22, and 23. Further, an elevating opening 24 is provided at one longitudinal end of the covered scaffolding plate A, and the elevating opening 24 is opened and closed by a lid 25.
Vertical ladders 30 and 31 are mounted between the horizontal connecting members 14 and 14 and 15 and 15. That is, the vertical ladders 30 and 31 are respectively connected to the horizontal connecting members 14 and 15 and the auxiliary horizontal connecting members 14a and 15a positioned therebelow, the vertical ladder members 26 and 27, and the vertical ladder members 26 and 27 and the front. It is formed from a plurality of horizontal ladder members 28 and 29 which are attached to the vertical support columns 10 and 12 with a space in the vertical direction. On the other hand, worker entrances 32 and 33 are provided between the lowermost vertical ladder members 26 and 27 and the rear vertical columns 11 and 13.
[0016]
With this configuration, as shown in FIGS. 1 and 11, for example, the worker W enters the internal space of the scaffold structure B through the worker entrance 33, rises the vertical ladder 31 from the inside, opens the lid 25, and moves up and down. The user can pass through the opening 24 and stand on the covered scaffolding plate A, and then close the lid 25 to perform a desired work at a high place. Thus, since the worker W ascends the vertical ladder 31 from the inside, the fall height is low even if it falls, so that the fall accident can be minimized and minimized.
[0017]
In the present embodiment, in the covered scaffolding plate A used for the construction of the scaffold structure B having the above-described configuration, the lifting opening 24 is provided leaving the corner at the end in the longitudinal direction, and the footrest is placed on the corner. It is characterized in that the portions 34 and 35 are formed.
[0018]
First, the overall structure of the covered scaffolding plate A will be described. As shown in FIGS. 2 to 6, the covered scaffolding plate A is substantially composed of front and rear frame members 40 and 41, left and right frame members 42, 43, and a horizontally long top plate 45 of the same shape attached to the upper surface of the rectangular frame 44. The rectangular frame 44 is formed of a channel member that opens inward. In the present embodiment, the covered scaffolding plate A is a pair of aluminum stamping molds in which the front and rear frame members 40 and 41 and half of the top plate 45 are integrally formed, as will be described later with reference to FIG. By using 63 and 64, it can be easily manufactured as described later.
[0019]
As shown in FIGS. 3 and 5, two vertical reinforcing ribs 46 and 47, which are examples of reinforcing ribs, and two horizontal reinforcing ribs 48 and 49 which are also examples of reinforcing ribs, are provided on the back surface of the top plate 45. Are attached so as to be freely extendable in the vertical and horizontal directions.
Moreover, as shown in FIGS. 2-4, the latching metal fittings 20 and 21 which consist of a C-shaped curved board member are attached to the both ends of the lidded scaffold board A, and it can attach or detach to the horizontal connection members 14 and 15, respectively. It is connected freely.
[0020]
In the covered scaffolding plate A having the above-described configuration, in the present embodiment, as shown in FIGS. 1 to 3 and 11, an elliptical lift having a long axis in the longitudinal direction is provided at one end of the covered scaffolding plate A. An opening 24 and a lid 25 having an oval shape for opening and closing the elevating opening 24 are provided.
As shown in FIGS. 6 and 11, the elevating opening 24 opens by opening one end of the top plate 45 in the longitudinal direction into an oval shape, and an oval edge of the notch opening on the lower surface of the top plate 45. It is formed by connecting oval annular peripheral walls 52 along the portion 50 by welding, rivets or the like.
[0021]
The annular peripheral wall 52 includes an annular reinforcing frame 53 made of a channel member that opens toward the outside, and an annular lid mounting collar portion 54 made of a plate projecting at an intermediate position on the inner peripheral surface of the reinforcing frame 53. Formed from. The reinforcing frame 53 and the lid mounting collar 54 can be manufactured by integrally drawing.
As shown in FIGS. 2 and 6, the oval lid 25 includes an annular reinforcing frame 55 made of a channel member that opens inward, and a lid fixed to the upper surface of the reinforcing frame 55 by welding, rivets, or the like. The top plate 56 is used.
[0022]
The reinforcing frame 55 is placed on the lid placing collar 54 provided on the inner surface of the annular peripheral wall 52 that forms the lifting opening 24, and the height thereof is a reinforcement for forming the lifting opening 24. The height of the frame 53 is set to approximately one half. Therefore, when the lifting opening 24 is closed by the lid 25, the upper surface of the lid 25 can be flush with the upper surface of the top plate 45 of the covered scaffolding plate A.
Two vertical reinforcing ribs 57 and 58 are attached to the lower surface of the lid top plate 56.
[0023]
As shown in FIGS. 2 and 11, one side surface of the lid top plate 56 is pivotally connected to a corresponding portion of the reinforcing frame 53 that forms the lifting opening 24 by a pair of hinges 59 and 60. On the other hand, the other side surface is detachably hooked to a corresponding portion of the lid mounting collar portion 54 that forms the lifting opening 24 by a lock mechanism 61 that can be hooked.
[0024]
As shown in FIGS. 1 to 3 and 11, the annular opening 52 and the covered scaffolding plate A forming the inner periphery of the lifting opening 24 are formed by making the lifting opening 24 and the lid 25 oval in this way. The substantially triangular footrests 34 and 35 are formed on the corners formed between the outer peripheral edges of the corners in the longitudinal direction.
Accordingly, as shown in FIG. 11, when the worker W ascends the vertical ladder 31 from the inside and opens the lid 25, passes through the lifting opening 24 and stands on the covered scaffolding plate A, the foot 62 is sufficiently wide. Since it can be placed on the footrests 34 and 35 having the same footrest area, particularly on the footrest 34, the operator W can safely move up and down between the covered scaffolding plates A without feeling uneasy. it can.
[0025]
In addition, the raising / lowering opening 24 is not limited to the above-mentioned oval shape, For example, it can also be set as the shape typically shown in FIGS.
That is, in FIG. 12, the lifting opening 24a and the lid 25a that opens and closes the lifting opening 24a both have an elliptical structure.
In FIG. 13, the elevating opening 24b and the lid 25b for opening and closing the elevating opening 24b both have a polygonal structure.
In FIG. 14, the elevating opening 24c and the lid 25c for opening and closing the elevating opening 24c both have a structure in which only one side edge is arcuate.
[0026]
Also with this configuration, the footrest portions 34a, 35a, 34b, 35b, 34c having a sufficiently large footrest area can be formed at the longitudinal ends of the covered scaffolding plates A2 to A4. Since the feet can be placed on the placing portions 34a, 35a, 34b, 35b, 34c, the worker W can safely move up and down between the covered scaffolding plates A2, A3, or A4 without feeling uneasy.
[0027]
Moreover, the covered scaffolding board A which concerns on this Embodiment has the characteristics also in the following structures.
That is, in this embodiment, as shown in FIG. 1, the non-covered scaffolding plate A1 has the same configuration as the covered scaffolding plate A except that the lifting opening 24 and the lid 25 are not provided. Yes.
[0028]
Therefore, as shown in FIGS. 5 and 6, the lid top plate 56 of the lid 25 in the lidded scaffold plate A is cut out together with the top plate 45 of the non-covered scaffold plate A1 and the vertical reinforcing ribs 46 and 47. It can be easily formed by a piece. And the lid | cover 25 can be easily formed by attaching the reinforcement frame 55 to the periphery of the lid | cover top plate 56 which consists of this cut-out piece. Further, the vertical reinforcing ribs 57 and 58 formed from the cut pieces of the vertical reinforcing ribs 46 and 47 are integrally attached to the lower surface of the lid top plate 56 by the above-described cutting operation.
[0029]
In addition, by connecting the annular peripheral wall 52 to the lower surface of the oval edge 50 after being cut out from the top plate 45 of the non-covered scaffolding plate A1 together with the lid top plate 56 of the lid 25 and the longitudinal reinforcing ribs 46, 47, it is easy. The raising / lowering opening 24 of the covered scaffolding board A can be formed.
As described above, in the present embodiment, the cut piece obtained by cutting the top plate 45 of the non-covered scaffolding plate A1 can be effectively used as the top plate 56 for the lid 25 of the covered scaffolding plate A and has the same shape. Since the lifting opening 24 can be easily formed, the covered scaffolding plate A can be manufactured with good yield and at low cost.
[0030]
Further, other structural features of the configurations of the covered scaffolding plate A and the scaffold structure B according to the illustrated embodiment will be described below.
As shown in FIG. 5, in the present embodiment, the front and rear frame members 40, 41 of the lidded scaffolding plate A and the side on which a pair of aluminum pressing mold members 63, 64 are integrally formed, and the half of the top plate 45 are in contact with each other. The bases of the lower extension walls 63a and 64a are connected to the edges, respectively, the front ends of the lower extension walls 63a and 64a are bent symmetrically outward, and Y-shaped engagement parts are formed by the bent parts 63b and 64b. Then, after the Y-shaped engaging portion is fitted into the Ω-shaped engaging member 65, the Ω-shaped engaging member 65 is pressed and deformed to caulk the Y-shaped engaging portion. Therefore, the wide lidded scaffolding plate A that is firmly integrated can be easily manufactured.
[0031]
The uncovered scaffolding plate A1 also has the same configuration as the covered scaffolding plate A except that it does not include the lid 25. Therefore, the uncovered scaffolding plate A1 also has a Y-shaped engaging portion and an Ω-shaped engaging member 65. Similarly, it is easily manufactured by the engagement.
[0032]
7 to 10 show a lock mechanism 61 for locking the lid 25 to the lift opening 24 so as to be freely opened and closed.
As shown in the figure, the lock mechanism 61 includes a stopper receiver 70 fixed to the front end of the lid top plate 56, a stopper 71 attached to the stopper receiver 70 so as to be swingable in the vertical direction, and a stopper receiver 70. The hinge spring 85 is an example of a spring interposed between the stopper 71 and the stopper 71.
[0033]
That is, as shown in FIG. 10, the stopper receiver 70 is substantially composed of a receiver main body 72 composed of a horizontally long rectangular vertical plate whose front portion is fitted into the reinforcing frame 55 of the lid top plate 56. A mounting member 74 made of a horizontally long rectangular plate that is connected to the back surface of the lid top plate 56 by a connecting bolt 73 and that extends continuously from the upper portion of the receiving body 72 toward one side; It comprises a stopper receiving member 75 made of a horizontally-long rectangular small horizontal plate continuously extending from the lower part of the gold main body 72 toward the other side.
[0034]
Further, a pivot support hole 76 for pivotally supporting the front portion of the stopper 71 in a vertically swingable manner using a pivot bolt 86 described later is provided in the front portion of the main body 72. On the other hand, a first latching hole 77 for latching one end portion 85a of a hinge spring 85, which is an example of a spring to be described later, is provided in the central portion of the receiver main body 72. Further, the attachment member 74 is provided with a bolt insertion hole 78 for inserting the connection bolt 73.
[0035]
On the other hand, as shown in FIG. 10, the stopper 71 substantially includes a stopper main body 79 formed of a horizontally long rectangular vertical plate whose front portion is fitted into the reinforcing frame 55 of the lid top plate 56, and the stopper main body 79. The upper part which consists of a rectangular horizontal board provided in the state extended from the rear upper surface of the rear part of the stopper main body 79 to one side by the L-shaped hook part latching piece 80 provided in the side view provided in a row by the side A knob lever 81 and a lower pressing lever 82 made of a rectangular vertical plate provided in a state of extending toward one side at the rear end of the collar hooking piece 80 are configured. In the above configuration, an arcuate hook contact sliding surface 80 a is formed on the lower edge of the hook hooking piece 80.
[0036]
In addition, a pivot support hole 83 is provided at the front portion of the stopper body 79 to pivotally support the front portion of the stopper 71 so as to be swingable in the vertical direction. On the other hand, a second latching hole 84 for latching the other end 85b of a hinge spring 85, which will be described later, is provided in a connecting portion between the stopper main body 79 and the L-shaped hook latching piece 80. ing.
[0037]
As shown in FIGS. 7 to 9, when assembling the lock mechanism 61 using the stopper receiver 70, the stopper 71, and the hinge spring 85, first, the front portion of the receiver body 72 of the stopper receiver 70 is used. Is inserted into the inside of the reinforcing frame 55, and the attachment member 74 is connected to the lid top plate 56 by the connecting bolt 73, so that the stopper receiver 70 is integrally attached to the front portion of the lid 25.
[0038]
Next, as shown in FIG. 7, the stopper 71 is arranged side by side with the stopper receiver 70, and the hinge spring 85 is interposed between the stopper 71 and the stopper receiver 70 to maintain the state. 7 and FIG. 10, the pivot bolt 86 is sequentially inserted into the pivot hole 83 of the stopper 71, the annular pivot portion 85 c of the hinge spring 85, and the pivot hole 76 of the stopper receiver 70. A nut 87 is screwed onto the end.
[0039]
Thereafter, the other end portion 85 b of the hinge spring 85 is hooked into the second hooking hole 84 provided in the stopper 71, and the one end portion 85 a of the hinge spring 85 is hooked into the first hooking hole 77 of the stopper receiver 70. The locking mechanism 61 can be formed by being hooked on.
[0040]
In such a configuration, when the lid 25 is closed, as shown in FIGS. 7 and 8, a clockwise rotational moment is always applied to the stopper 71 around the pivot bolt 86 by the elastic force of the hinge spring 85. Thus, this rotational moment automatically causes the hook retaining piece 80 to be hooked on the lid placing hook 54, so that the lid 25 can be easily and reliably locked to the lifting opening 24. Can do. The over rotation of the stopper 71 can be prevented by the stopper receiving member 75.
[0041]
On the other hand, when ascending from the lower covered scaffolding plate A to the upper covered scaffolding plate A, the lower pressing lever 82 is lifted upward to give the lid 25 a counterclockwise rotation around the pivot bolt 86. The hooking piece 80 and the lid mounting hook part 54 can be released, and then the lid 25 is lifted upward to easily lift the lid cover plate A from the upper cover plate A. Can be moved to.
[0042]
Further, when descending from the upper covered scaffolding plate A to the lower covered scaffolding plate A, the upper knob lever 81 is picked up through a rectangular opening 88 provided in the lid top plate 56 and lifted upward, 25, the hooking piece 80 and the lid mounting hook part 54 can be unlocked by giving the counterclockwise rotation around the pivot bolt 86, and then the cover 25 is moved upward. It is possible to easily move from the upper covered scaffolding plate A to the lower covered scaffolding plate A by lifting.
[0043]
After the above-described opening operation is completed, it is usually necessary to close the lid 25. In the present embodiment, however, the lower edge of the stopper hooking portion 80 of the stopper 71 has an arcuate hook sliding contact. A surface 80a is formed. Accordingly, as the lid 25 is closed, the collar slide contact surface 80a comes into contact with the lid mounting collar 54 while sliding, and the collar hooking piece 80 of the stopper 71 is once counterclockwise. Will be rotated in the direction. Thereafter, when the dead center is exceeded, the hook hooking piece 80 of the stopper 71 rotates again in the clockwise direction and is automatically hooked on the lid mounting hook 54.
[0044]
As shown in FIGS. 2, 3, 5, and 6, the top plate 45 and the top plate 56 for the lidded scaffolding plate A are provided with anti-slip projections 66 and 67 that protrude upward. In addition, rainwater outflow holes 66a and 67a are provided at the center of the projections 66 and 67, respectively. Therefore, it is possible to prevent as much as possible an accident caused by slipping when the worker W works on the covered scaffolding plate A. Further, the top plate 45 and the top plate 56 for the lidded scaffolding plate A are provided with anti-slip bands 69 and 69a formed from a plurality of small vertical grooves, respectively.
[0045]
As shown in FIG. 4, a known attachment / detachment latch mechanism 68 is attached to the latch fitting 21, and by operating this attachment / detachment latch mechanism 68, the latch fitting 21 can be easily and reliably attached to the horizontal coupling member 15. And can be easily released by operating in the reverse procedure.
[0046]
As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. Other embodiments and modifications considered within the scope of the above are also included.
For example, in the above-described embodiment, the rectangular frame and the top plate constituting the covered scaffolding plate are formed by caulking a pair of aluminum pushing members, but the covered scaffolding is obtained by caulking three or more aluminum pushing members. It can also be formed by forming a plate, using a single wide aluminum pressing member, or welding the top plate to a rectangular frame. Here, the rectangular frame includes not only a frame member on all four sides but also a frame member having at least a frame member on the side edge in the longitudinal direction. Furthermore, the lid is not limited to open and close by swinging up and down around the pivot axis. Like a sliding lid, the lid moves horizontally between the closed position and the open position to open and close the lift opening. A lid that can be used can also be used.
[0047]
【The invention's effect】
In the covered scaffolding board of Claims 1-6, the opening for raising / lowering is provided leaving a corner | angular part in the longitudinal direction edge part of a covered scaffolding board, and the footrest part is formed on this corner | angular part. . Therefore, when the operator ascends the vertical ladder from the inside, opens the lid, passes through the lifting opening and stands on the covered scaffolding board, the foot is placed on the footrest having a sufficiently large footrest area. Therefore, the operator can safely move up and down between the covered scaffolding plates without feeling uneasy.
In addition, the lid is detachably hooked to the lid mounting collar of the lift opening via a lock mechanism, and the lock mechanism is swingably attached to the peripheral edge of the lid and mounted on the lid by the biasing force of the spring. An upper knob lever for releasing the latch between the stopper and the lid mounting hook on the upper and lower portions of the stopper, respectively, provided with a stopper automatically hooked on the mounting hook; A lower pressing lever is integrally attached. Therefore, when ascending from the lower lidded scaffolding plate to the upper lidded scaffolding plate, the lower lid is operated to release the lock, and then the lid is lifted upward to easily lift the upper lid from the lower lidded scaffolding plate. It is possible to move to the scaffolding plate. On the other hand, when descending from the upper covered scaffolding plate to the lower covered scaffolding plate, it is easy to lift the lid upward after operating the upper knob lever to release the lock It is possible to move from the upper covered scaffolding plate to the lower covered scaffolding plate. That is, it is possible to smoothly move up and down in the scaffold structure.
[0048]
In particular, in the covered scaffolding plate according to claim 2, since the shape of the opening for raising and lowering is an ellipse whose major axis extends in the longitudinal direction of the covered scaffolding plate, the foot having a sufficiently large footrest area is easily obtained. A mounting part can be formed in the longitudinal direction edge part of a covered scaffolding board.
In the covered scaffolding board according to claim 3, since the shape of the lifting opening is an ellipse whose major axis extends in the longitudinal direction of the covered scaffolding board, the footrest part having a sufficiently large footrest area can be easily obtained. Can be formed at the longitudinal end of the covered scaffolding plate.
[0049]
In the covered scaffolding board according to claim 4, since the shape of the lifting opening is a polygon whose major axis extends in the longitudinal direction of the covered scaffolding board, the footrest part having a sufficiently large footrest area can be easily obtained. Can be formed at the longitudinal end of the covered scaffolding plate.
Claim6In the above-described covered scaffolding plate, the covered scaffolding plate having an opening for raising and lowering by cutting out a part of the uncovered scaffolding plate formed by attaching a top plate having reinforcing ribs on the lower surface to the upper surface of the horizontally long rectangular frame Is formed, and the cutout piece is used as a lid top plate. As described above, the cutout piece obtained by cutting the top plate of the non-covered scaffolding plate can be effectively used as the top plate for the lid of the covered scaffolding plate, and the lifting opening can be easily formed. It can be manufactured with good yield and at low cost.
[0050]
[0051]
[Brief description of the drawings]
FIG. 1 is a perspective view of a scaffold structure including a covered scaffold plate according to an embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a back view of the same.
FIG. 4 is a side view of the same.
5 is a cross-sectional view taken along the line II in FIG.
6 is a cross-sectional view taken along line II-II in FIG.
FIG. 7 is a plan view of the lock mechanism.
8 is a cross-sectional side view taken along line III-III in FIG. 7 showing a locked state of the locking mechanism.
9 is a cross-sectional side view taken along the line III-III in FIG. 7 showing the unlocked state of the lock mechanism.
FIG. 10 is an exploded perspective view of the lock mechanism.
FIG. 11 is an enlarged plan view of a main part of a covered scaffolding plate.
FIG. 12 is a schematic diagram of a main part of a covered scaffolding plate according to a modification example.
FIG. 13 is a schematic diagram of a main part of a covered scaffolding plate according to a modification example.
FIG. 14 is a schematic diagram of a main part of a covered scaffolding plate according to a modification example.
FIG. 15 is a perspective view of a scaffold structure including a conventional scaffold plate.
FIG. 16 is an enlarged plan view of a main part of the scaffold board.
FIG. 17 is a perspective view of a scaffold structure including a conventional scaffold plate.
[Explanation of symbols]
A Covered scaffolding board A1 Uncovered scaffolding board
A2 Covered scaffolding board A3 Covered scaffolding board
A4 Covered scaffolding board B Scaffolding structure
W Worker 10 Front vertical support
11 Rear vertical support 12 Front vertical support
13 Rear vertical support 14 Horizontal connecting member
14a Auxiliary horizontal connecting member 15 Horizontal connecting member
15a Auxiliary horizontal connecting member 16 Brace
17 braces 18 braces
19 Brace 20 Hanger
21 Latch bracket 22 Latch bracket
23 latch 24 opening for lifting
24a Lifting opening 24b Lifting opening
24c Elevating opening 25 Lid
25a lid 25b lid
25c Lid 26 Vertical ladder member
27 Vertical ladder member 28 Horizontal ladder member
29 Horizontal ladder member 30 Vertical ladder member
31 Vertical ladder 32 Worker entrance
33 Worker entrance / exit 34 Foot rest
34a Foot rest 34b Foot rest
34c Foot rest part 35 Foot rest part
35a Foot rest part 35b Foot rest part
40 Front frame member 41 Rear frame member
42 Left frame member 43 Right frame member
44 Rectangular frame 45 Top plate
46 Vertical reinforcement rib 47 Vertical reinforcement rib (reinforcement rib)
48 Lateral reinforcement ribs 49 Lateral reinforcement ribs
50 oval edge 52 annular peripheral wall
53 Reinforcement frame 54 Lid for placing lid
55 Reinforcement frame 56 Top plate for lid
57 Vertical reinforcement ribs 58 Vertical reinforcement ribs
59 Hinge 60 Hinge
61 Lock mechanism 62 Feet
63 Aluminum stamping material 63a Downward bending wall
63b Bent part 64 Aluminum stamping die
64a downward extension wall 64b bent part
65 Ω-like engagement member 66 Protrusion
66a Rainwater outflow hole 67 Protrusion
67a Rainwater outflow hole 68Latchmechanism
69 Anti-slip belt 69a Anti-slip belt
70 Stopper stopper 71 Stopper
72 Receptacle body 73 Connecting bolt
74 Mounting member 75 Stopper receiving member
76 Pivot hole 77 First retaining hole
78 Bolt insertion hole 79 Stopper body
80 buttock latching piece 80a buttock sliding contact surface
81 Upper knob lever 82 Lower lever
83 Pivot hole 84 Second retaining hole
85 Hinge spring 85a One end
85b Other end 86 Pivot bolt
87 Nut 88 Opening

Claims

A top plate is attached to the upper surface of a rectangular frame having a horizontally long rectangular shape, and latching metal fittings are projected and attached to both longitudinal ends of the rectangular frame, and an elevating opening and a lid for opening and closing the elevating opening are provided. In the covered scaffolding plate provided at the longitudinal end ,
The lifting opening is provided leaving a corner at the longitudinal end of the covered scaffolding plate, and a footrest is formed on the corner ,
The elevating opening is provided with a lid mounting collar, and the lid is detachably latched on the lid mounting collar via a lock mechanism, and the lock mechanism is swayed on the peripheral edge of the lid. A stopper that is movably attached and that is automatically hooked to the lid mounting saddle by the biasing force of a spring; and the stopper and the lid mounting on the upper and lower portions of the stopper, respectively. A covered scaffolding board, wherein an upper knob lever and a lower pressing lever for releasing the hook from the hook are integrally attached .

2. The covered scaffolding plate according to claim 1, wherein a shape of the opening for raising and lowering is an oval having a long axis extending in a longitudinal direction of the covered scaffolding plate.

2. The covered scaffolding plate according to claim 1, wherein a shape of the opening for lifting is an ellipse whose major axis extends in a longitudinal direction of the covered scaffolding plate.

2. The covered scaffolding plate according to claim 1, wherein the shape of the lifting opening is a polygon whose major axis extends in the longitudinal direction of the covered scaffolding plate.

The elevating opening is formed by cutting out a part of a non-covered scaffolding plate formed by attaching a top plate having reinforcing ribs on the lower surface to the upper surface of a horizontally long rectangular frame. The covered scaffold board of any one of 1-4.

6. The covered scaffolding plate according to claim 5, wherein the cutout piece of the lifting opening is used as a lid top plate for the lifting opening .