JP3700952B2

JP3700952B2 - Support

Info

Publication number: JP3700952B2
Application number: JP02731696A
Authority: JP
Inventors: 辰雄小野
Original assignee: 辰雄小野
Priority date: 1996-01-22
Filing date: 1996-01-22
Publication date: 2005-09-28
Anticipated expiration: 2016-01-22
Also published as: JPH09195530A

Description

【０００１】
【発明の属する技術分野】
本発明は、橋梁工事，各種建築，土木工事において、例えば、橋桁，大トラス等の重量物を架設する場合に、これらの橋桁，大トラス等のブロックを支える支保工に関する。
【０００２】
【従来の技術】
一般に、橋梁工事において橋桁を橋脚上に架設する場合、予め工場で任意の大きさに製作された橋桁ブロックを架設現場まで輸送し、次いでこのブロックをクレーンで吊り下げながら支保工上に受けさせ、この支保工上で仮受けされたブロックをさらに他のブロックと接合した後に、橋脚上に設置される。一方、橋桁が橋脚上に設置された後は、支保工は解体または撤去される。
【０００３】
しかして、支保工を工事現場で組立，解体するための作業能率が悪く、作業経費などの点で経済性に劣る。このため、例えば、実開平７―８４１６号公報には折り畳み自在な支保工が提案され、輸送中はコンパクトに折り畳み、現場で使用する時には立方体状に展開して、いちいち組立，解体することなく、現場ごとに転用できるようになった。
【０００４】
上記公報に開示された支保工は、図１２に示すように、相対する一対の固定フレーム８１，８１と、各固定フレームの左右両端部に枢支された折り畳み可能な一対の補強フレーム８２，８２と、固定フレーム８１，８１の内側中間に回転自在に基端を枢着した床板とで構成されたものである。
【０００５】
この場合、補強フレーム８２は、固定フレーム８１を構成する支柱８３の上端間に枢着された折り畳み自在な手摺支柱８４と、支柱８３，８３の中間に枢着された折り畳み自在な水平材８５と、支柱８３，８３の上端と水平材８５の中間に枢着されたブレス８６，８６と、手摺支柱８４と水平材８５の各中間に架設された垂直材８７と、で構成され、使用中は、図示するように、立方体状に展開されるが、不使用時、例えば、輸送中は、ブレス８６，８６の下端を水平材８５からはずし、前後方向から自重により圧縮すると補強フレーム８２が折り畳まれ、全体がコンパクトになるものである。
【０００６】
【発明が解決しようとする課題】
しかしながら、上記従来の支保工は、補強フレーム８２が折り畳み構造であること、ブレス８６が上方に二本あるのみで水平材８５より下方には補強材が存在しないことに鑑み、矢印Ａ，Ｂで示す縦方向，左右方向からの荷重に対しては固定フレーム８１の存在によって耐久性があり、かつ強度があって変形される心配はないが、振動等によって矢印Ｃで示す前後方向からの荷重に対しては弱く、場合によって圧縮方向に変形するおそれがある。
【０００７】
そこで、本発明の目的は、縦方向，左右方向のみならず前後方向からの荷重に対しても耐久性があり、かつ余分な作業をすることなく極めて簡単に折り畳みできる支保工を提供することである。
【０００８】
【課題を解決するための手段】
上記の目的を達成するため、本発明にかかる支保工は、左右一対の前部支柱と、これらの前部支柱にそれぞれ対向する左右一対の後部支柱と、左側前部及び後部支柱間に架設した固定ブレスと、同じく右側前部及び後部支柱間に架設した固定ブレスと、左側前部及び後部支柱の下部にそれぞれ一端を枢着させると共に他端を右側前部及び後部支柱の上部にそれぞれ枢着させた前後一対の伸縮ブレスと、右側前部及び後部支柱の下部にそれぞれ一端を枢着させると共に他端を左側前部及び後部支柱の上部にそれぞれ枢着させた前後一対の伸縮ブレスと、各伸縮ブレスに設けられてこれらの設定伸長状態のロックおよびロック解除を可能にする伸長ロック部材と、左右の前部支柱の上部と左右の後部支柱の上部間にそれぞれ着脱自在に架設した前後一対の横杆と、左側前部及び後部支柱に一端側が枢支された第一の床部材と、右側前部及び後部支柱に一端側が枢支された第二の床部材と、上記第一の床部材の他端側および第二の床部材の他端側を連結するヒンジ部材と、上記第一の床部材および第二の床部材間に着脱自在に架設されて連結部材の脱抜により上記各床部材を上記ヒンジ部材を介して屈曲可能にする連結板とを備えたことを特徴とするものである。
【０００９】
この場合、左右一対の前部支柱１，２間に架設された一対の前側伸縮ブレス１８，１９と左右一対の後部支柱３，４間に架設された一対の後部伸縮ブレス１８，１９をそれぞれ中央部付近で X 字状に交差させ、これら中央部付近で交差する上記伸縮ブレスの一方にブラケット２９，２９を設け、該ブラケット２９，２９と上記連結板４２，４２とを固定支持部材４８，４８によって着脱可能に固定支持するようにしても良い。
【００１０】
同じく、伸縮ブレスは、アウターチューブと、該アウターチューブ内に出入自在に挿入されたインナーチューブと、で構成するのが好ましい。
【００１１】
【発明の実施の形態】
以下、この発明の実施の一形態を図について説明する。図１１は、この発明の支保工の基本形態を示す全体の斜視図、図２は、同じく正面図、図３は、同じく側面図である。
この実施の形態に係る支保工は、従来と同じく、左右一対の前部支柱１，２と、これらの前部支柱１，２にそれぞれ対向する左右一対の後部支柱３，４と、左側前部及び後部支柱１，３間に架設した固定ブレス５６，５７と、同じく右側前部及び後部支柱２，４間に架設した固定ブレス５６，５７とを備えている。
更に本発明では、左側前部及び後部支柱１、３の下部にそれぞれ一端を枢着させると共に他端を右側前部及び後部支柱２，４の上部にそれぞれ枢着させた前後一対の伸縮ブレス１８，１８と、右側前部及び後部支柱２，４の下部にそれぞれ一端を枢着させると共に他端を左側前部及び後部支柱１，３の上部にそれぞれ枢着させた前後一対の伸縮ブレス１９，１９と、各伸縮ブレスに設けられてこれらの設定伸長状態のロックおよびロック解除を可能にする伸長ロック部材２６，２６と、左右の前部支柱１，２の上部と左右の後部支柱３，４の上部間にそれぞれ着脱自在に架設した前後一対の横杆３１，３１と、左側前部及び後部支柱１，３に一端側が枢支された第一の床部材３７と、右側前部及び後部支柱２，４に一端側が枢支された第二の床部材３９と、上記第一の床部材３７の他端側および第二の床部材３９の他端側を連結するヒンジ部材４１と、上記第一の床部材３７および第二の床部材３９間に着脱自在に架設されて連結部材４５の脱抜により上記各床部材３７，３９を上記ヒンジ部材４１を介して屈曲可能にする連結板４２、４２とを備えている。
更に、左右一対の前部支柱１，２間に架設された一対の前側伸縮ブレス１８，１９と左右一対の後部支柱３，４間に架設された一対の後部伸縮ブレス１８，１９をそれぞれ中央部付近で X 字状に交差させ、これら中央部付近で交差する上記伸縮ブレスの一方にブラケット２９，２９を設け、該ブラケット２９，２９と上記連結板４２，４２とを固定支持部材４８，４８によって着脱可能に固定支持するようにしている。
また、伸縮ブレス１８，１９は、アウターチューブと該アウターチューブ内に出入自在に挿入されたインナーチューブとで構成されている。
以下更に詳しく説明する。
【００１２】
また、これらの各前部支柱１，２および各後部支柱は下端部にこれらより小径の連結棒１ａ，２ａ，３ａ，４ａが突設され、上端部にはこれらの連結棒１ａ，２ａ，３ａ，４ａの外径より僅か大きい径の連結孔１ｂ，２ｂ，３ｂ，４ｂを持ったフランジ板１ｃ，２ｃ，３ｃ，４ｃが取り付けられている。
【００１３】
さらに、上記フランジ板１ｃ，２ｃ，３ｃ，４ｃのそれぞれには、図４にフランジ板２ｃを代表させて示すように、同一円周上に複数（この図では８個）の取付孔５が穿設されている。
【００１４】
６，７は、前部支柱１，２の上記フランジ板１ｃ，２ｃに取り付けられた取付ブラケットで、図４に代表して示すように、このうち取付ブラケット７は上記フランジ板２ｃを上下面から挟むコ字状部８と、これに連設された垂直取付片９とからなる。
【００１５】
そして、上記コ字状部８を形成する２片８ａ，８ｂには連結孔１０が穿設されており、これらの連結孔１０と上記フランジ板２ｃにおける複数の取付孔５のうち、前部支柱１のフランジ板１ｃに対向する側の取付孔５とにボルト１１が挿通され、かつこのボルト１１端にナット１２が締め込まれることで、取付ブラケット７がフランジ板２ｃに着脱可能に固定される。
【００１６】
また、上記垂直取付片９には上下方向に３個の取付孔１３，１４，１５が形成されている。なお、前部支柱１上のフランジ板１ｃにも、上記取付ブラケット７と同一構成の上記取付ブラケット６が対称配置されている。そして、さらに、後部支柱３，４上のフランジ板３ｃ，４ｃにもこれらと同等のブラケット６，７が対称配置されている。
【００１７】
また、図１および図２において、１６，１７は、上記前部支柱１，２の下部に互いに対向するように突設された下部取付片であり、これらの下部取付片１６，１７には伸縮ブレス１８，１９の各一端がピン２０，２１で枢支されている。
【００１８】
また、その伸縮ブレス１８，１９は、中央部付近で互いに交差されて、各他端が、図４に示すように、ボルト２２ａ，２３ａおよびナット２２ｂ，２３ｂにより各ブラケット７，６の各取付孔１５に枢支されている。
【００１９】
なお、これらの各伸縮ブレス１８，１９は、太径管部Ａ内に小径管部Ｂを出入自在に装着したものからなり、これらを最伸長位置に伸ばしたとき、図５に示すように、これらを貫通するピン孔２４相互に伸長ロック部材としてのピン２６を嵌挿可能にしてあり、このピンの嵌挿により収縮不可能とされている。
【００２０】
このピン２６は、図５に示すように、先端部で軸２７を中心に９０度回転してピン孔２４に対する抜止めがなされる抜止めキー２８を有する。２９は、中央部付近で交差する伸縮ブレス１８，１９のうち、一方の伸縮ブレス１９の太径管部Ａ外周に突設されたブラケットで、このブラケット２９には、後述の床部材に設けられた連結板上の取付孔とともにボルトが挿通されて、ナットにより締め止めされるブラケット孔３０が設けられている。
【００２１】
そして、上記構成と同様の下部取付片１６，１７および伸縮ブレス１８，１９が左右の後部支柱３，４およびこれらの間に同様にしてそれぞれ架設される。
【００２２】
また、２つの前部支柱１，２の取付ブラケット６，７および後部支柱３，４の取付ブラケット６，７の各中央にある図４に示すような取付孔１４には、水平配置される横杆３１の両端がボルト３２およびナット３３を用いて着脱自在に枢支されている。
【００２３】
図１および図２において、３４，３５は、前部支柱１，２および後部支柱３，４の略中位レベル位置に突設された上下一対の補強フランジ片で、これらの間に垂直取付板３６が連設されている。
【００２４】
前部支柱１側および後部支柱３側の上記垂直取付板３６には外形が矩形（長方形）の第一の床部材３７の一端側がピン３８によって枢支され、前部支柱２側および後部支柱４側の上記垂直取付片３６には、同じく矩形の第二の床部材３９の一端側がピン４０によって枢支されている。なお、これらの床部材３７，３９は板状や枠状に形成される。
【００２５】
そして、これらの第一の床部材３７の他端側および第二の床部材３９の他端側は互いに対向して、ここでヒンジ部材４１によって屈曲自在に連結されている。
【００２６】
また、これらの第一の床部材３７の前後面側には、図５，図６に示すように、連結板４２の一端部が溶接などによって固定され、これらの連結板４２の床部材３９の前後面と対向する位置に、その床部材３９の前後面に貫通形成した取付孔４３に連通可能な連通孔４４が設けられている。
【００２７】
そして、これらの各取付孔４３および連通孔４４に連結部材としてのボルト４５を通してナット４６をこれにねじ込むことで、第一の床部材３７に対して第二の床部材３９を同一平面位置に一体保持することができるようにしてある。
【００２８】
また、４７は、上記各連結板４２の中央部に形成された床部材支持孔であり、この床部材支持孔４７および上記ブラケット２９上のブラケット孔３０に対して、図５に示すように、固定支持部材としてのボルト４８を挿入し、これにナット４９を締め込むことで、各床部材３７，３９が伸縮ブレス１９に固定支持可能とされる。
【００２９】
また、これらの第一の床部材３７および第二の床部材３９の上部にはそれぞれ同一サイズの第一の床板５０，第二の床板５１が、図７および図８に示すように、着脱自在に取り付けることができる。
【００３０】
一方、前部支柱１および後部支柱３に設けた上記フランジ板１ｃ，３ｃの互いに対向する取付孔５と、前部支柱２および後部支柱４に設けた上記フランジ板２ｃ，３ｃの互いに対向する取付孔５には、それぞれ図４に示したものと同様の取付ブラケット５２，５３が、図３に示すように取り付けられている。
【００３１】
また、前部支柱１および後部支柱３の互いに対向する下部位置および前部支柱２および後部支柱４の互いに対向する下部位置には、それぞれ下部取付片５４，５５が突設されている。
【００３２】
そして、これらの各下部取付片５４，５５には各一のブレス５６，５７の一端がピン５８，５９により支着されており、これらの各ブレス５６，５７は中程で互いに交差して、他端が上記取付ブラケット５３，５２の図４に示すような下方の取付孔を介してボルト６１，６０およびナット（図示せず）により連結されている。
【００３３】
さらに、左右にある取付ブラケット５２，５３間には、図３に示すように、固定横杆６２が水平に配置され、これらの固定横杆６２の両端が、取付ブラケット５２，５３に形成された、図４に示したものと同様の上記中位にある取付孔に通してボルト６３，６４および図示しないナットにより連結されている。
【００３４】
なお、図１，図３において、６５は、各ブレス５６，５７の交差部に連結されて、これらを補強する補強板である。
【００３５】
図９は、図１に示した支保工を二段積みしたものを示し、図１に示したものと同一の構成部分には同一符号を付して、その重複する説明を省略する。
【００３６】
この二段積みの支保工は、上段の各支柱１，２，３，４の連結棒１ａ，２ａ，３ａ，４ａを、下段の各支柱１，２，３，４のフランジ孔１ｂ，２ｂ，３ｂ，４ｂ内に差し入れて行われ、上下二段の各床部材７０間と、床部材７０および地上間には梯子７１が架設され、各床部材７０間への上り下りを容易にしている。なお、ここでは各床部材７０上面の四周付近には、作業工具等の落下を防止する落下防止枠７２が立設されている。
【００３７】
また、図１に示した下段用の支保工に対して、上段の支保工では、各支柱１，２，３，４の下端部に下部取付片１６，１７，５４，５５が設けられておらず、従って、上段の各伸縮ブレス１８，１９の下端は、下段の取付ブラケット６，７，５２，５３の、図４に示すような上方の取付孔にボルト７３およびナット７４により連結される。
【００３８】
なお、下段の支保工の各支柱１，２，３，４の下端には、地盤上に支保工全体を安定支持するフランジ７６付きの筒状脚７７が嵌挿される。
【００３９】
かかる構成になる支保工は、前部支柱１，２および後部支柱３，４がそれぞれ全長に亘って互いに交差する伸縮ブレス１８，１９およびブレス５６，５７と、横杆３１および固定横杆６２によって、前後および左右の各方向および上下方向に支持されて、全体として力学上大きな剛体をなす。
【００４０】
そこで、このような支保工を折り畳んで搬送または収納する場合には、図示しないクレーンのワイヤ端をフランジ板１ｃ，２ｃ，３ｃ，４ｃのいずれかの取付孔５などに係止して、クレーンを操作して全体を持ち上げる。
【００４１】
そして、ある程度地上より浮上した場合には、この支保工の全体を斜めおよび横に倒した状態にして、再び地上に降ろして寝かせる（図１０参照）。
【００４２】
次に、このワイヤによって吊り下げた状態のまま、上記各取付ブラケット６，７，間に架設した各横杆３１を、ボルト３２およびナット３３を緩めることによって取り外し、続いて、各伸縮ブレス１８，１９のピン２６を、キー２８をピン２６の径内に収めることで各ピン孔２４から抜き取る。
【００４３】
これにより、大径管部Ａ内に小径管部Ｂが進入して各伸縮ブレス１８，１９の全長の短縮化を可能にする。
【００４４】
図５に示すブラケット２９のブラケット孔３０および連結板４２の床部材支柱孔４７に挿入されているボルト４８をナット４９を緩めて抜き取り、更に連結板４２からナット４６を緩めてボルト４５を抜き取り、第一の床部材３７および第二の床部材３９のヒンジ部材４１を中心とする折曲を可能とする。
【００４５】
そうした上で、次に上記ワイヤをさらに緩めると、上方の前部支柱１および後部支柱３などの自重によって、伸縮ブレス１８，１９の上記小径管部Ｂが上記大径管部Ａ内に摺動しながら入り込んでいき、その各支柱１，３は、図１０の２点鎖線で示すように降下していく。
【００４６】
このとき、上記各床部材３７，３９は、上記各支柱１，３の自重を受けてヒンジ部材４１を中心として屈曲していく。
【００４７】
そして、上記ワイヤをさらに十分に緩めていくと、上記伸縮ブレス１８，１９および床部材３７，３９は、図１１に示すように、前部支柱１および後部支柱３と、前部支柱２および後部支柱４との間に折り畳まれて、支保工全体の形状，容積を十分に小さく抑えられることとなる。この結果、出荷運搬や収納が容易となり、トラック上における占有空間を十分に小さく抑えることができる。
【００４８】
一方、これを作業現場で組み立てる場合には、再びクレーンのワイヤ端を上記のようにフランジ板１ｃ，２ｃ，３ｃ，４ｃの取付板５に係止して持ち上げ、図１や図１０に示す状態に立ち上げ、各伸縮ブレス１８，１９を最大伸長させ、さらに床部材３７，３９をそれぞれ垂直になるように立ち上げる。
【００４９】
そして、この状態にて、上記太径管部Ａおよび小径管部Ｂの各ピン孔２４にピン２６を差し込んでキーロックさせ、さらにブラケット２９のブラケット孔３０および連結板４２の床部材支持孔４７にボルト４８を通してナット４９をねじ込むことで（図５参照）、支保工の組み立てが迅速，簡単に行える。
【００５０】
また、かかる支保工では、上記のような起立状態において、各伸縮ブレス１８，１９および固定ブレス５７，５８が互いに交差して、各前部支柱１，２および後部支柱３，４をそれぞれ支えるため、簡単な構成であるにも拘らず、この支保工の全長に亘って、上下，左右，前後の各方向からの荷重負荷に対しても、十分な強度を確保できる。
【００５１】
【発明の効果】
本発明の支保工は、左右一対の前部支柱１，２と、これらの前部支柱１，２にそれぞれ対向する左右一対の後部支柱３，４と、左側前部及び後部支柱１，３間に架設した固定ブレス５６，５７と、同じく右側前部及び後部支柱２，４間に架設した固定ブレス５６，５７と、左側前部及び後部支柱１、３の下部にそれぞれ一端を枢着させると共に他端を右側前部及び後部支柱２，４の上部にそれぞれ枢着させた前後一対の伸縮ブレス１８，１８と、右側前部及び後部支柱２，４の下部にそれぞれ一端を枢着させると共に他端を左側前部及び後部支柱１，３の上部にそれぞれ枢着させた前後一対の伸縮ブレス１９，１９と、各伸縮ブレスに設けられてこれらの設定伸長状態のロックおよびロック解除を可能にする伸長ロック部材２６，２６と、左右の前部支柱１，２の上部と左右の後部支柱３，４の上部間にそれぞれ着脱自在に架設した前後一対の横杆３１，３１と、左側前部及び後部支柱１，３に一端側が枢支された第一の床部材３７と、右側前部及び後部支柱２，４に一端側が枢支された第二の床部材３９と、上記第一の床部材３７の他端側および第二の床部材３９の他端側を連結するヒンジ部材４１と、上記第一の床部材３７および第二の床部材３９間に着脱自在に架設されて連結部材４５の脱抜により上記各床部材３７，３９を上記ヒンジ部材４１を介して屈曲可能にする連結板４２、４２とを備えた構成にしている。
これにより、縦方向，左右方向のみならず前後方向からの荷重に対しても耐久性があり、かつ余分な作業をすることなく極めて簡単に折り畳みできる支保工を安価に得られる効果がある。
【００５２】
また、請求項２の発明によれば中央部付近で交差する上記伸縮ブレスの一方にブラケットを設け、該ブラケットとを固定支持部材によって着脱可能に固着支持するように構成したので、伸縮ブレスによってヒンジ部材を中心として折れ曲がる床部材を強固かつ安全に水平支持できるという効果が得られる。
【００５３】
そして、請求項３の発明によれば、伸縮ブレスの構造が簡単で加工性及び組付け性が向上する。
【図面の簡単な説明】
【図１】この発明の実施の一形態による支保工の基本構造を示す斜視図である。
【図２】図１における支保工の正面図である。
【図３】図１に示す支保工の左側面図である。
【図４】図１における取付ブラケットの取付構造を拡大して示す説明図である。
【図５】図１における伸縮ブレスの交差部付近を分解して示す斜視図である。
【図６】図１における連結板付近を分解して示す斜視図である。
【図７】図１における床部材上に床板を載せた状態を示す要部の斜視図である。
【図８】図７に示す床板除去時の床部材付近を示す斜視図である。
【図９】図１に示す支保工を二段積みしたものを示す斜視図である。
【図１０】図９に示す支保工の折り畳み過程を示す説明図である。
【図１１】図９に示す支保工の折り畳み完了状態を示す説明図である。
【図１２】従来の支保工を示す概念図である。
【符号の説明】
１，２前部支柱
３，４後部支柱
１８，１９伸縮ブレス
２６ピン（伸長ロック部材）
２９ブラケット
３１横杆
３７第一の床部材
３９第二の床部材
４１ヒンジ部材
４２連結板
４５ボルト（連結部材）
４８ボルト（固定支持部材）
５６，５７固定ブレス[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support work for supporting blocks such as bridge girders and large trusses when, for example, heavy objects such as bridge girders and large trusses are erected in bridge construction, various constructions, and civil engineering works.
[0002]
[Prior art]
In general, when installing a bridge girder on a bridge pier in bridge construction, transport the bridge girder block, which was manufactured in advance to an arbitrary size at the factory, to the construction site, and then receive this block on the support work while hanging it with a crane, After the block temporarily received on the support is joined to another block, it is installed on the pier. On the other hand, after the bridge girder is installed on the pier, the support work is dismantled or removed.
[0003]
Therefore, the work efficiency for assembling and dismantling the support work at the construction site is poor, and the cost is low in terms of work costs. Therefore, for example, Japanese Utility Model Laid-Open No. 7-8416 proposes a foldable support structure, which can be folded compactly during transportation, expanded into a cubic shape when used on site, without being assembled and disassembled one by one. Can be diverted at each site.
[0004]
As shown in FIG. 12 , the support disclosed in the above publication includes a pair of opposing fixed frames 81 , 81 and a pair of foldable reinforcing frames 82, 82 pivotally supported at the left and right ends of each fixed frame. And a floor plate pivotally attached to the inner middle of the fixed frames 81 and 81 so as to be rotatable.
[0005]
In this case, the reinforcing frame 82 includes a collapsible handrail column 84 pivotally mounted between the upper ends of the columns 83 constituting the fixed frame 81 , and a collapsible horizontal member 85 pivotally mounted between the columns 83 and 83. , the upper end and the intermediate pivoted the breath 86, 86 of the horizontal member 85 of the struts 83 and 83, the uprights 87 are bridged each intermediate handrail posts 84 and horizontal member 85, in the configuration, during use As shown in the figure, it expands in a cubic shape, but when not in use, for example, during transportation, the lower end of the brace 86 , 86 is removed from the horizontal member 85 and compressed by its own weight in the front-rear direction, the reinforcing frame 82 is folded. The whole is compact.
[0006]
[Problems to be solved by the invention]
However, the above conventional support works are indicated by arrows A and B in view of the fact that the reinforcing frame 82 has a folded structure and that there are only two breaths 86 above and no reinforcing material exists below the horizontal member 85. The load from the vertical direction and the horizontal direction shown in the figure is durable due to the presence of the fixed frame 81 , and there is no fear of deformation due to the strength. On the other hand, it is weak and may be deformed in the compression direction in some cases.
[0007]
Accordingly, an object of the present invention is to provide a support that is durable against a load from the front and rear as well as the vertical and left and right directions and that can be folded very easily without extra work. is there.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the support according to the present invention is constructed between a pair of left and right front struts, a pair of left and right rear struts respectively facing the front struts, and a left front and rear struts. Fixed brace, fixed brace erected between right front and rear struts, and one end pivotally attached to the lower part of left front and rear struts, and the other end pivoted to the upper part of right front and rear struts. A pair of front and rear stretch braces, and a pair of front and rear stretch braces each having one end pivotally attached to the lower part of the right front part and the rear post and the other end pivotally attached to the upper part of the left front part and the rear post, respectively. an elongate locking member to enable locking and unlocking of these settings tension provided stretch breath, between the upper portion of the upper left and right rear pillars of the left and right front pillars before the detachably bridged respectively A pair of transverse rods, a first floor member whose one end to the left front and rear supports are pivotally supported, and a second floor member whose one end is pivotally supported on the right front and rear supports, the first A hinge member that connects the other end side of the floor member and the other end side of the second floor member, and the first floor member and the second floor member are detachably installed between the first floor member and the second floor member. Each floor member is provided with a connecting plate that can be bent via the hinge member .
[0009]
In this case, a pair of front expansion / contraction braces 18 and 19 laid between a pair of left and right front struts 1 and 2 and a pair of rear expansion / contraction braces 18 and 19 laid between a pair of left and right rear struts 3 and 4 are respectively centered. The brackets 29 and 29 are provided on one of the stretchable braces intersecting in the vicinity of the center in an X shape, and the brackets 29 and 29 and the connecting plates 42 and 42 are fixedly supported by the support members 48 and 48. May be fixedly supported in a detachable manner.
[0010]
Similarly, it is preferable that the expansion / contraction brace is constituted by an outer tube and an inner tube inserted in the outer tube so as to freely enter and exit.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. FIG. 11 is an overall perspective view showing the basic form of the support work of the present invention, FIG. 2 is a front view, and FIG. 3 is a side view.
As in the prior art, the support according to this embodiment includes a pair of left and right front struts 1 and 2, a pair of left and right rear struts 3 and 4 respectively facing the front struts 1 and 2, and a left front portion. And fixed braces 56 and 57 installed between the rear columns 1 and 3 and fixed braces 56 and 57 installed between the right front and rear columns 2 and 4.
Further, in the present invention, a pair of front and rear telescopic braces 18 having one end pivotally attached to the lower portions of the left front and rear posts 1 and 3 and the other end pivoted to the upper portions of the right front and rear posts 2 and 4, respectively. , 18 and a pair of front and rear telescopic braces 19, each having one end pivotally attached to the lower part of the right front and rear struts 2, 4, and the other end pivotally attached to the upper part of the left front part and rear struts 1, 3, respectively. 19, extension lock members 26, 26 that are provided in each of the expansion / contraction braces and enable locking and unlocking of these set extension states, upper portions of the left and right front columns 1, 2, and left and right rear columns 3, 4. A pair of front and rear side rails 31, 31 detachably installed between the upper parts of the two, a first floor member 37 whose one end is pivotally supported by the left front and rear columns 1, 3, and the right front and rear columns 2nd and 4th one end is pivotally supported Between the member 39, the hinge member 41 that connects the other end side of the first floor member 37 and the other end side of the second floor member 39, and the first floor member 37 and the second floor member 39. There are provided connecting plates 42 and 42 that are detachably mounted and allow the floor members 37 and 39 to be bent via the hinge member 41 by removing the connecting member 45.
Further, a pair of front-side telescopic braces 18 and 19 laid between a pair of left and right front struts 1 and 2 and a pair of rear-side telescopic braces 18 and 19 laid between a pair of left and right rear struts 3 and 4 are arranged in the center. The brackets 29 and 29 are provided on one of the expansion / contraction braces intersecting in the vicinity of the X portion in the vicinity, and the brackets 29 and 29 and the connecting plates 42 and 42 are fixed by the fixing support members 48 and 48. It is fixed and supported so as to be detachable.
The expansion / contraction braces 18 and 19 are composed of an outer tube and an inner tube that is inserted into the outer tube so as to freely enter and exit.
This will be described in more detail below.
[0012]
Each of the front struts 1 and 2 and the rear struts has connecting rods 1a, 2a, 3a and 4a having smaller diameters projecting from the lower ends thereof, and these connecting rods 1a, 2a and 3a are projected from the upper ends. , 4a, flange plates 1c, 2c, 3c, and 4c having connecting holes 1b, 2b, 3b, and 4b having a diameter slightly larger than the outer diameter are attached.
[0013]
Further, each of the flange plates 1c, 2c, 3c, 4c has a plurality of (eight in this figure) mounting holes 5 formed on the same circumference, as shown by the flange plate 2c in FIG. It is installed.
[0014]
Reference numerals 6 and 7 denote mounting brackets attached to the flange plates 1c and 2c of the front struts 1 and 2, respectively. As shown in FIG. 4, the mounting bracket 7 includes the flange plate 2c from the upper and lower surfaces. It consists of a U-shaped portion 8 sandwiched between and a vertical mounting piece 9 provided continuously therewith.
[0015]
The two pieces 8a and 8b forming the U-shaped portion 8 are provided with connecting holes 10, and among these connecting holes 10 and the plurality of mounting holes 5 in the flange plate 2c, the front struts are formed. The bolt 11 is inserted into the mounting hole 5 on the side facing the flange plate 1c of the first member, and the nut 12 is fastened to the end of the bolt 11, so that the mounting bracket 7 is detachably fixed to the flange plate 2c. .
[0016]
The vertical mounting piece 9 is formed with three mounting holes 13, 14, 15 in the vertical direction. The mounting bracket 6 having the same configuration as that of the mounting bracket 7 is also symmetrically arranged on the flange plate 1c on the front column 1. Further, brackets 6 and 7 equivalent to these are symmetrically arranged on the flange plates 3c and 4c on the rear support columns 3 and 4, respectively.
[0017]
1 and 2, reference numerals 16 and 17 denote lower mounting pieces projecting from the lower portions of the front support columns 1 and 2 so as to face each other. The lower mounting pieces 16 and 17 extend and contract. One end of each of the breaths 18 and 19 is pivotally supported by pins 20 and 21.
[0018]
The expansion / contraction braces 18 and 19 intersect each other in the vicinity of the central portion, and the other ends are attached to the mounting holes of the brackets 7 and 6 by bolts 22a and 23a and nuts 22b and 23b as shown in FIG. 15 is pivotally supported.
[0019]
Each of these expansion / contraction braces 18 and 19 comprises a large-diameter pipe portion A in which a small-diameter pipe portion B is detachably attached. When these are extended to the maximum extension position, as shown in FIG. A pin 26 as an extension lock member can be inserted into the pin holes 24 penetrating the pins 24 and cannot be contracted by the insertion of the pins.
[0020]
As shown in FIG. 5, the pin 26 has a retaining key 28 that rotates 90 degrees around the shaft 27 at the tip portion to prevent the pin hole 24 from being removed. Reference numeral 29 denotes a bracket projecting on the outer periphery of the large-diameter pipe portion A of one of the expansion / contraction braces 19 among the expansion / contraction braces 18 and 19 intersecting in the vicinity of the central portion. The bracket 29 is provided on a floor member to be described later. A bracket hole 30 is provided in which a bolt is inserted together with the mounting hole on the connecting plate and is fastened by a nut.
[0021]
And the lower attachment pieces 16 and 17 and the expansion-contraction braces 18 and 19 similar to the said structure are each erected similarly between the right and left rear support | pillars 3 and 4 and these.
[0022]
Also, the mounting holes 14 as shown in FIG. 4 at the center of the mounting brackets 6 and 7 of the two front columns 1 and 2 and the mounting brackets 6 and 7 of the rear columns 3 and 4 are horizontally disposed. Both ends of the collar 31 are pivotally supported using bolts 32 and nuts 33 in a detachable manner.
[0023]
In FIG. 1 and FIG. 2, 34 and 35 are a pair of upper and lower reinforcing flange pieces projecting at substantially middle level positions of the front struts 1 and 2 and the rear struts 3 and 4, and a vertical mounting plate therebetween. 36 is continuously provided.
[0024]
One end side of a first floor member 37 having a rectangular outer shape is pivotally supported by a pin 38 on the vertical mounting plate 36 on the front column 1 side and the rear column 3 side, and the front column 2 side and the rear column 4 are supported. One end side of a second floor member 39 that is also rectangular is pivotally supported by a pin 40 on the vertical mounting piece 36 on the side. In addition, these floor members 37 and 39 are formed in plate shape or frame shape.
[0025]
The other end side of the first floor member 37 and the other end side of the second floor member 39 are opposed to each other and are flexibly connected by a hinge member 41 here.
[0026]
Further, as shown in FIGS. 5 and 6, one end portion of the connecting plate 42 is fixed to the front and rear surface sides of the first floor member 37 by welding or the like. A communication hole 44 that can communicate with a mounting hole 43 that is formed through the front and rear surfaces of the floor member 39 is provided at a position facing the front and rear surfaces.
[0027]
Then, the second floor member 39 is integrated with the first floor member 37 in the same plane position by screwing the nut 46 into the mounting holes 43 and the communication holes 44 through bolts 45 as connecting members. It can be held.
[0028]
Further, 47 is a floor member support hole formed in the central portion of each of the connecting plates 42. With respect to the floor member support hole 47 and the bracket hole 30 on the bracket 29, as shown in FIG. By inserting bolts 48 as fixed support members and tightening nuts 49 into the bolts, the floor members 37 and 39 can be fixedly supported on the telescopic brace 19.
[0029]
Further, the first floor plate 50 and the second floor plate 51 of the same size are detachably attached to the upper portions of the first floor member 37 and the second floor member 39, respectively, as shown in FIGS. Can be attached to.
[0030]
On the other hand, the mounting holes 5 of the flange plates 1c, 3c provided in the front column 1 and the rear column 3 facing each other and the mounting of the flange plates 2c, 3c provided in the front column 2 and the rear column 4 facing each other. The mounting brackets 52 and 53 similar to those shown in FIG. 4 are attached to the holes 5 as shown in FIG.
[0031]
Further, lower mounting pieces 54 and 55 project from the lower position of the front column 1 and the rear column 3 facing each other and the lower position of the front column 2 and the rear column 4 facing each other.
[0032]
One end of each one of the braces 56 and 57 is attached to each of the lower mounting pieces 54 and 55 by pins 58 and 59. These braces 56 and 57 intersect each other in the middle, and the other The ends of the mounting brackets 53 and 52 are connected by bolts 61 and 60 and nuts (not shown) through lower mounting holes as shown in FIG.
[0033]
Further, as shown in FIG. 3, fixed horizontal bars 62 are horizontally disposed between the left and right mounting brackets 52 and 53, and both ends of these fixed horizontal bars 62 are formed on the mounting brackets 52 and 53. These are connected through bolts 63 and 64 and nuts (not shown) through the above-described middle mounting holes similar to those shown in FIG.
[0034]
In FIGS. 1 and 3, reference numeral 65 denotes a reinforcing plate that is connected to the intersections of the braces 56 and 57 and reinforces them.
[0035]
FIG. 9 shows a structure in which the support shown in FIG. 1 is stacked in two stages. The same components as those shown in FIG.
[0036]
This two-stage support is made by connecting the connecting rods 1a, 2a, 3a, 4a of the upper columns 1, 2, 3, 4 to the flange holes 1b, 2b, A ladder 71 is installed between the two upper and lower floor members 70 and between the floor member 70 and the ground to facilitate ascending and descending between the floor members 70. Here, in the vicinity of the four circumferences of the upper surface of each floor member 70, a fall prevention frame 72 for preventing a work tool or the like from dropping is provided upright.
[0037]
Further, in contrast to the lower support shown in FIG. 1, in the upper support, lower mounting pieces 16, 17, 54, and 55 are provided at the lower ends of the columns 1, 2, 3, and 4, respectively. Therefore, the lower ends of the upper expansion / contraction braces 18 and 19 are connected to the upper mounting holes of the lower mounting brackets 6, 7, 52, and 53 as shown in FIG. 4 by bolts 73 and nuts 74.
[0038]
A cylindrical leg 77 with a flange 76 that stably supports the entire support on the ground is fitted into the lower end of each support 1, 2, 3, 4 of the lower support.
[0039]
The supporting structure having such a configuration is composed of the stretchable braces 18 and 19 and the braces 56 and 57 in which the front struts 1 and 2 and the rear struts 3 and 4 intersect each other over the entire length, and the reed 31 and the fixed reed 62. It is supported in the front-rear and left-right directions and the up-down direction to form a large rigid body as a whole.
[0040]
Therefore, when such a support is folded and transported or stored, the wire end of the crane (not shown) is locked to the mounting hole 5 of any of the flange plates 1c, 2c, 3c, 4c, etc. Operate and lift the whole.
[0041]
And when it has surfaced from the ground to some extent, the whole of the support work is tilted and tilted sideways, then lowered to the ground and laid down again (see FIG. 10).
[0042]
Next, in the state of being suspended by the wire, the horizontal rods 31 laid between the mounting brackets 6, 7 are removed by loosening the bolts 32 and the nuts 33. The 19 pins 26 are extracted from the pin holes 24 by accommodating the key 28 within the diameter of the pin 26.
[0043]
As a result, the small-diameter pipe portion B enters the large-diameter pipe portion A, thereby making it possible to shorten the overall length of each of the telescopic braces 18 and 19.
[0044]
The bolt 48 inserted in the bracket hole 30 of the bracket 29 and the floor member support hole 47 of the connecting plate 42 shown in FIG. 5 is extracted by loosening the nut 49, and further the nut 46 is loosened from the connecting plate 42 and the bolt 45 is extracted. The first floor member 37 and the second floor member 39 can be bent around the hinge member 41.
[0045]
Then, when the wire is further loosened, the small-diameter pipe portion B of the stretch braces 18 and 19 slides into the large-diameter pipe portion A due to the weight of the upper front column 1 and rear column 3 and the like. The support columns 1 and 3 descend as shown by the two-dot chain line in FIG.
[0046]
At this time, the floor members 37 and 39 are bent around the hinge member 41 under the weight of the support columns 1 and 3.
[0047]
When the wires are further loosened, the stretchable braces 18 and 19 and the floor members 37 and 39 are, as shown in FIG. 11, the front strut 1 and the rear strut 3, the front strut 2 and the rear strut. By being folded between the support columns 4, the shape and volume of the entire support work can be suppressed sufficiently small. As a result, shipping, transportation and storage are facilitated, and the occupied space on the truck can be sufficiently reduced.
[0048]
On the other hand, when assembling this at the work site, the wire end of the crane is again locked to the mounting plate 5 of the flange plates 1c, 2c, 3c, 4c as described above, and lifted, as shown in FIGS. The telescopic braces 18 and 19 are extended to the maximum, and the floor members 37 and 39 are raised to be vertical.
[0049]
In this state, the pin 26 is inserted into each pin hole 24 of the large-diameter pipe portion A and the small-diameter pipe portion B so as to be key-locked, and further, the bracket hole 30 of the bracket 29 and the floor member support hole 47 of the connecting plate 42. By screwing the nut 49 through the bolt 48 (see FIG. 5), the support can be assembled quickly and easily.
[0050]
Further, in such a support work, in the standing state as described above, the stretchable braces 18 and 19 and the fixed braces 57 and 58 cross each other to support the front struts 1 and 2 and the rear struts 3 and 4, respectively. In spite of the simple structure, sufficient strength can be ensured over the entire length of the support, even with respect to load loads from the top, bottom, left and right and front and rear directions.
[0051]
【The invention's effect】
The support structure of the present invention includes a pair of left and right front struts 1 and 2, a pair of left and right rear struts 3 and 4 facing the front struts 1 and 2, and the left front and rear struts 1 and 3. Fixed braces 56 and 57 installed on the right side, and fixed braces 56 and 57 similarly installed between the right front and rear support columns 2 and 4, and one end pivotally attached to the lower part of the left front and rear support columns 1 and 3, respectively. A pair of front and rear telescopic braces 18 and 18 with the other ends pivoted to the upper part of the right front part and the rear pillars 2 and 4, respectively, and one end pivoted to the lower part of the right front part and the rear pillars 2 and 4, respectively. A pair of front and rear stretch braces 19 and 19 whose ends are pivotally attached to the upper portions of the left front and rear struts 1 and 3, respectively, and provided on each of the stretch braces to enable locking and unlocking of these set stretched states and extension locking member 26, 26, left One end is pivoted to a pair of front and rear side rails 31, 31 detachably installed between the upper part of the front pillars 1, 2 and the upper part of the left and right rear pillars 3, 4 and the left front part and the rear pillars 1, 3. The supported first floor member 37, the second floor member 39 pivotally supported at one end side by the right front and rear struts 2, 4, the other end side of the first floor member 37 and the second floor member 39. A hinge member 41 for connecting the other end side of the floor member 39, and the first floor member 37 and the second floor member 39 are detachably installed, and the connecting members 45 are removed so that each floor member 37, 39 is provided with connecting plates 42 and 42 that can be bent through the hinge member 41.
Thereby, there is an effect that it is durable against a load from the front and rear direction as well as the vertical direction and the left and right direction, and that it is possible to obtain a support that can be folded very easily without extra work at low cost.
[0052]
According to the invention of claim 2, since the bracket is provided on one of the stretchable braces intersecting in the vicinity of the center, and the bracket is detachably fixed and supported by the fixed support member, the hinge is stretched by the stretchable brace. The effect that the floor member bent around the member can be supported horizontally and firmly is obtained.
[0053]
And according to invention of Claim 3, the structure of an expansion-contraction brace is simple, and workability and an assemblability improve.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a basic structure of a support work according to an embodiment of the present invention.
2 is a front view of the support work in FIG. 1. FIG.
FIG. 3 is a left side view of the support shown in FIG.
4 is an explanatory view showing an enlarged mounting structure of the mounting bracket in FIG. 1. FIG.
FIG. 5 is an exploded perspective view showing the vicinity of the intersection of the expansion and contraction brace in FIG. 1;
6 is an exploded perspective view showing the vicinity of a connecting plate in FIG. 1. FIG.
7 is a perspective view of a main part showing a state where a floor board is placed on the floor member in FIG. 1. FIG.
8 is a perspective view showing the vicinity of a floor member when the floor board shown in FIG. 7 is removed. FIG.
FIG. 9 is a perspective view showing two-stage stacking of the support shown in FIG.
10 is an explanatory view showing a folding process of the support shown in FIG. 9. FIG.
11 is an explanatory view showing a state where the support shown in FIG. 9 is completely folded.
FIG. 12 is a conceptual diagram showing a conventional support work.
[Explanation of symbols]
1, 2, Front struts 3, 4 Rear struts 18, 19 Stretch brace 26 Pin (extension lock member)
29 Bracket 31 Reed 37 First floor member 39 Second floor member 41 Hinge member 42 Connection plate 45 Bolt (connection member)
48 bolt (fixed support member)
56,57 fixed bracelet

Claims

A pair of left and right front struts 1 and 2, a pair of left and right rear struts 3 and 4 respectively facing the front struts 1 and 2, and a fixed brace 56 installed between the left front and rear struts 1 and 3; 57, fixed braces 56 and 57 erected between the right front and rear struts 2 and 4 and one end pivotally attached to the lower part of the left front and rear struts 1 and 3, respectively, and the other end on the right front and A pair of front and rear stretch braces 18 and 18 pivotally attached to the upper portions of the rear struts 2 and 4, respectively, one end pivotally attached to the right front and lower portions of the rear struts 2 and 4, and the other end to the left front and rear. A pair of front and rear stretch braces 19 and 19 pivotally attached to the upper portions of the columns 1 and 3, and extension lock members 226 and 26 provided on each of the stretch braces to enable locking and unlocking of these set extended states; , Left and right front struts 1, And a pair of front and rear horizontal rails 31, 31 detachably mounted between the upper part of the left and right rear pillars 3, 4, and a first floor pivoted at one end to the left front part and rear pillars 1, 3. A member 37, a second floor member 39 whose one end is pivotally supported by the right front and rear struts 2 and 4, the other end of the first floor member 37 and the other end of the second floor member 39. And a hinge member 41 that connects the first floor member 37 and the second floor member 39 detachably, and the connecting member 45 is removed to connect the floor members 37 and 39 to the hinge member 41. Supporting plate provided with connecting plates 42 and 42 that can be bent via

A pair of front expansion / contraction braces 18 and 19 laid between a pair of left and right front struts 1 and 2 and a pair of rear expansion / contraction braces 18 and 19 laid between a pair of left and right rear struts 3 and 4 are respectively located near the center. Brackets 29, 29 are provided on one of the stretchable braces intersecting in the vicinity of the center portion in an X shape, and the brackets 29, 29 and the connecting plates 42, 42 can be attached and detached by fixed support members 48, 48. The support structure according to claim 1, wherein the support structure is fixedly supported on the frame.

Telescopic brace 18, 19 and the outer tube, shoring according to claim 1 or 2 and the inner tube is inserted and out freely within the outer tube, in which is constituted