JP3932287B2 - Support mechanism for fixed formwork - Google Patents

Support mechanism for fixed formwork Download PDF

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JP3932287B2
JP3932287B2 JP2003166889A JP2003166889A JP3932287B2 JP 3932287 B2 JP3932287 B2 JP 3932287B2 JP 2003166889 A JP2003166889 A JP 2003166889A JP 2003166889 A JP2003166889 A JP 2003166889A JP 3932287 B2 JP3932287 B2 JP 3932287B2
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support
main
main girder
receiving
supported
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JP2005002653A5 (en
JP2005002653A (en
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健介 清水
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Jfe工建株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、主桁に床版を打設する際に使用する固定型枠の支持機構に関する。
【0002】
【従来の技術】
近年、主桁に床版を打設して橋梁を架設するために、種々の手法が開発されている。かかる手法の中には、平行に延びる主桁同士の間に設置される固定型枠を主桁に対して支持するための機構についても開発されている。その体表的なものに、本件特許出願人が既に開示した特許文献1に関するものがある。この特許文献1にかかる発明では、固定型枠を支持するための支持機構の梁材を主桁に支持するに当たり、主桁を構成する腹板に梁材支持用のジグを着脱自在に取り付け、梁材の端部をこのジグで主桁に対して支持させている。
【0003】
【特許文献1】
特開2002−275829号
【0004】
【発明が解決しようとする課題】
しかしながら、かかる機構では、主桁の延びる方向について、梁材を予め決められた特定の位置にしか設置することができない。このため、架設しようとする橋梁の状況に応じて支持機構を変化させることが困難であった。また、主桁同士の間隔が変化するような位置では、梁材自体をその幅に対応したものを予め選択しておかなければならず、汎用性に乏しかった。
【0005】
そこで、本発明では、架設する橋梁の状況に応じて臨機応変に対処させることが容易な固定型枠の支持機構を提供する。
【0006】
【課題を解決するための手段】
(1)本発明に係る固定型枠の支持機構は、主桁の延びる方向における所定の間隔毎に、前記主桁の腹板から側方に張り出させて設けた補鋼材を利用して、床版打設用の固定型枠を前記主桁に支持させる固定型枠の支持機構であって、
前記補鋼材に着脱可能に取り付けられた支持ユニットと、該支持ユニットに支持されて前記主桁と平行に延びる受け梁と、該受け梁に端部が支持されて前記主桁の延びる方向に対して交わる方向に配されて前記固定型枠を支持する梁材と、を備え、
前記支持ユニットにおける前記受け梁の受け部が前記補鋼材の端縁より突出されるように前記補鋼材に取り付けられていると共に前記梁材に、その長さを伸縮可能にする伸縮機構を設けたことを特徴とするものである。
本発明によれば、梁材の一端が搭載される受け梁は、主桁と平行をなして主桁に取り付けられる。このため、受け梁の軸方向における所望の位置に梁材の一端を搭載させることが可能である。
また、主桁間の間隔が主桁の延びる方向において異なるように設置されていても、各地点に対応した長さに梁材を伸縮させて梁材を設置することができる。このように、本発明にかかる固定型枠の支持機構では主桁の設置された状況に応じてフレキシブルに対応させることが可能な支持機構とすることができる。
【0007】
(2)また、上記(1)に記載のものにおいて、伸縮機構は、前記梁材の本体と、前記梁材の軸方向に対してスライド可能なアームと、このアームと前記梁材の本体とを係り合わせて前記アームを前記梁材に対して位置固定させる固定手段とから構成されていることを特徴とするものである。
このように、梁材の長さを伸縮させる機構として複雑な機構を採用せず、単にアームを梁材の本体に対してスライドさせるだけの機構を採用しているので、作業性の悪い橋梁の架設現場であっても容易に梁材を伸縮させることができる。
【0008】
(3)また、上記(1)または(2)に記載のものにおいて、補鋼材の間に受け梁を支持する支柱を、主桁の下フランジに立設したことを特徴とするものである。
本発明によれば、支持ユニットと補鋼材に過度な負荷がかかることを防止すると共に、受け梁が撓んでしまうことを効果的に阻止する。
【0009】
(4)また、主桁の延びる方向における所定の間隔毎に、前記主桁の腹板から側方に張り出させて設けた補鋼材を利用して、床版打設用の固定型枠を前記主桁に支持させる固定型枠の支持機構であって、
前記補鋼材に着脱可能に取り付けられた支持ユニットと、該支持ユニットに支持されて前記主桁と平行に延びる受け梁と、該受け梁に端部が支持されて前記主桁の延びる方向に対して交わる方向に配されて前記固定型枠を支持する梁材と、前記補鋼材の間における前記主桁の下フランジに立設されて前記受け梁を支持する支柱と、を備え、
前記支持ユニットにおける前記受け梁の受け部が前記補鋼材の端縁より突出されるように前記補鋼材に取り付けられていることを特徴とするものである。
本発明によれば、梁材の一端が搭載される受け梁は、主桁と平行をなして主桁に取り付けられる。このため、受け梁の軸方向における所望の位置に梁材の一端を搭載させることが可能である。
また、支持ユニットと補鋼材に過度な負荷がかかることを防止すると共に、受け梁が撓んでしまうことを効果的に阻止できる。
【0010】
(5)また、上記(4)に記載のものにおいて、支柱に、該支柱に支持される受け梁の高さを調整する高さ調整手段を備えたことを特徴とするものである。
このように、高さ調整手段を設けることで、支持される受け梁の高さを調整して、梁材と受け梁との間に隙間が形成されてしまうことや、受け梁が不本意に傾いてしまうことを防止することができる。その一方で、意図的に受け梁を傾けることも可能である。
【0011】
(6)また、上記(1)〜(5)のいずれかに記載のものにおいて、支持ユニットには、これらにより支持される受け梁の高さを調整する高さ調整手段を備えたことを特徴とするものである。
このように、高さ調整手段を設けることで、支持される受け梁の高さを調整して、梁材と受け梁との間に隙間が形成されてしまうことや、受け梁が不本意に傾いてしまうことを防止することができる。その一方で、意図的に受け梁を傾けることも可能である。
【0013】
【発明の実施の形態】
以下、本発明の実施の形態について図面を参照しながら説明する。
【0014】
図1は本発明の一実施形態にかかる固定型枠の支持機構を示している。この固定型枠の支持機構は、橋梁のコンクリート床版9を打設する際に使用する固定型枠を主桁1,1に支持するためのものである。先ず、橋梁について説明すると、橋梁は、図示しない支柱等によって支持された一対の主桁1,1と、主桁1,1間に配置され、これら主桁1,1を連絡している横桁10とを有している。コンクリート床版9は、これら主桁1,1の上部に打設される。
【0015】
一対の主桁1,1は、互いに平行をなして延びるように図示しない支柱等により支持されている。各主桁1は、所定の高さを有する帯状の腹板2と、腹板2の上端にて腹板2の厚み方向に張り出す上フランジ3と、腹板2の下端にてその厚み方向に張り出す下フランジ4とから構成されている。横桁10は、主桁1,1の腹板2同士を連結するように構成されたもので、その基本構成は主桁1,1と同様に、所定の高さを有する腹板10aと、腹板10aの上端からその厚み方向に張り出している上フランジ10bと、下端から厚み方向に張り出す下フランジ10cとから構成されている。
【0016】
また、各主桁1,1の腹板2には、図2に示すように、互いに対向し合う面に複数の補鋼材5,6が腹板2と直交するように配されて腹板2から張り出している。これら補鋼材5,6は、主桁1の強度及び剛性を高めるための部材であり、上フランジ3と下フランジ4とを連絡するようにしてそれぞれ設けられている。補鋼材5,6は、その張り出し長さの異なるものが2種類ある。張り出し量の小さな第一補鋼材5は、相互の間隔が狭いピッチで主桁1の延びる方向に配されている一方で、張り出し量の大きな第二補鋼材6は、第一補鋼材数個分のピッチに対応するピッチ毎に配されている。さらに、腹板2には、補鋼材5,6同士の間に水平に延びる水平補鋼材7が設けられている。この水平補鋼材7も主桁1の強度及び剛性を向上させるための部材である。
【0017】
そして、コンクリート床版9は、図1の二点鎖線に示すように、主桁1,1の上フランジ3の上面に支持されるようにして打設される。打設されるコンクリート床版9はその両側部が、各主桁1,1の外側方に張り出すようにして打設される。このコンクリート床版9は、主桁1,1間の部位が一定の厚みに形成され、最も大きなモーメントが生じる主桁1,1に支持される部位が、最も厚い肉厚となるように形成される。そして、主桁1,1の外側方の部位は、外側に向かうにつれその肉厚が薄くなるようにその下面が斜めに傾くように形成される。
【0018】
この実施形態にかかる支持機構は、上記コンクリート床版9を形成するための固定型枠のうち、主桁1,1同士の間の部位を下から支持するためのものである。なお、各主桁1,1の外側方にも固定型枠が設置され、この固定型枠を支持するための手段が設置されるが、ここではその説明を省略する。
【0019】
主桁1,1間に設置される支持機構は、図1に示すように、主桁1,1同士の中央の位置にて主桁1,1と平行をなして延びる縦桁11と、この縦桁11と固定型枠の間に配されるようにして縦桁11に保持された逆三角形状の基本機構部20とを有している。
【0020】
縦桁11は、各横桁10の中央部にて、横桁10同士を連絡するようにして横桁10の下フランジ10cの下面に取り付けられている。縦桁11は、H形鋼により構成されており、所定の高さを有する帯状の平板部11aと、この平板部11aの上下端にてその厚み方向に張り出すフランジ部11b,11cとから構成されている。
【0021】
一方、基本機構部20は、横桁10同士の間の部位にて、縦桁11の軸方向における所定の間隔毎に複数配されている。各基本機構部20は、縦桁11の上フランジ3から上側に向かうにつれ外側に向けて末広がりとなるようにして取り付けられた一対のパイプサポート21,21と、パイプサポート21,21によって軸方向の両端が支持された梁材としての大引き材22とを有している。また、縦桁11には、その上フランジ11bに対して着脱自在な一対の保持器23,23が取り付けられ、基本機構部20は、この保持器23,23によって縦桁11に取り付けられる。そして、大引き材22は、角形パイプから構成されており、その両端が連結器24,24を介してパイプサポート21,21に支持されている。なお、この連結器24,24には大引き材22の高さを調整するための高さ調整機構(不図示)が設けられ、大引き材22の高さ並びに傾きを自在に調整できるように構成されている。
【0022】
次に、図3〜図9を参照して梁材を受ける受け梁50が主桁1に取り付けられる機構について説明する。
【0023】
上述したように主桁1の腹板2には複数の補鋼材5,6が主桁1の延びる方向における所定の間隔毎に複数設けられている。これらの補鋼材5,6には、図3及び図4に示すように、受け梁50を受けるための支持ユニット51,60がそれぞれ取り付けられている。張り出し量の小さな第一補鋼材5には、図3のA部を拡大表示した図6及び図7に示すように、その端縁から主桁1同士の中心側へ向けて突出するようにして支持ユニット51がそれぞれ取り付けられている。一方、張り出し量の大きな第二補鋼材6には、図3のB部を拡大表示した図8及び図9に示すように、一対の支持ユニット60が板厚の両側から挟み込むようにして第二補鋼材6から主桁1の延びる方向に突出するようにしてそれぞれ取り付けられている。さらに、補鋼材同士の間には、受け梁50を支持している支柱70が支持ユニット51,60とは別に配置されている。受け梁50は、主桁1と平行を成すようにして張り出し量の大きな第二補鋼材6の間に配置される。
【0024】
なお、腹板2の外側面側には複数の支持具100が取り付けられている。この支持具100は、主桁1の外側方に支持機構を設置する際に使用されるジグである。
【0025】
第一補鋼材5に取り付けられた支持ユニット51は、図6及び図7に示すように、第一補鋼材5に沿わされてボルト止めされる板状の取付板52と、この取付板52の先端から水平をなして突出するベース部53と、ベース部53に取り付けられて受け梁50を下から支持する2つの受け部55,55とから構成されている。
【0026】
取付板52には2つの孔52a,52aが上下に配されるように形成されている。取付板52はこれらの孔52a,52aが第一補鋼材5のねじ孔に一致されて、ボルトが螺合されることで第一補鋼材5に取り付けられる。また、ベース部53は、第一補鋼材5の端縁より主桁1同士の中心側に突出されて取付板52と一体をなすように取付板52に接合されている。このベース部53には、第一補鋼材5の端縁から所定の寸法だけ主桁1同士の中心側の位置に二つの貫通孔が形成されている。なお、これらの貫通孔は第一補鋼材5を間に位置させて第一補鋼材5の一面側と他面側とにそれぞれ形成されている。また、ベース部53の裏面には、これら貫通孔の形成された位置に、ナット54,54がそれぞれ接合されている。そして、ベース部53に取り付けられた各受け部55は、ナット54に螺合してベース部53を上下に貫通するようにして設けられたねじ部材56と、ねじ部材56の上端に設けられ、受け梁50が搭載される受け皿57とから構成されている。この受け部は、ねじ部材56をナット54に対して回転させることで、受け皿57を上下に移動させている。
【0027】
一方、図8及び図9に示すように、第二補鋼材6に取り付けられた支持ユニット60は、受け梁50の端部を支持するものであり、第二補鋼材6に沿わせてボルト止めされるL字状の取付板61と、この取付板61から水平をなして主桁1の延びる方向へ突出するベース部62と、ベース部62に取り付けられて受け梁50を下から支持する1つの受け部64とから構成されている。
【0028】
取付板61には、その基部61aに2つの孔61c,61cが上下に配されるように形成されている。取付板61は、L字の突出部61bが主桁1同士の中心側に向けられて、これらの孔61c,61cを第二補鋼材6のねじ孔に一致させてボルト締めして第二補鋼材6に取り付けられる。また、ベース部62は、取付板61と一体をなすように取付板52の突出部61bに接合されている。このベース部62には、取付板61から所定の寸法だけ主桁1同士の中心側に離れた位置に貫通孔が形成されている。また、ベース部62の裏面には、貫通孔の形成された位置に、ナット63が接合されている。そして、ベース部62に取り付けられた受け部64は、ナット63に螺合してベース部62を上下に貫通するようにして設けられたねじ部材65と、ねじ部材65の上端に設けられ、受け梁50が搭載される受け皿66とから構成されている。この受け部64は、ねじ部材65をナット63に対して回転させることで、受け皿66を上下に移動させている。
【0029】
なお、図9から明らかなように、一対の支持ユニット60,60が、第二補鋼材6を挟んで背合わせとなる状態で第二補鋼材6に取り付けられている。
【0030】
他方、補鋼材同士の間に配された支柱70は、図5に示すように、主桁1の下フランジ4に支持される基部71と、基部71に対して上下に伸縮するロッド72と、ロッド72の上端に取り付けられて受け梁50が搭載される受け皿73とから構成されている。基部71は、その内部が空洞に形成されたパイプ材で構成され、ロッド72がこの基部71の内部に挿入されるようにして構成されている。また、基部71の上端には、この基部71に対して伸縮したロッド72を所望の位置に留めておくストッパ74が設けられている。このように支柱70が構成されているため、受け梁50の搭載される受け皿73は、その高さを自在に調整することができる。なお、この支柱70は、各補鋼材5,6に取り付けられた支持ユニット51,60を結ぶ線と同一直線上に位置するように配さている。
【0031】
そして、受け梁50は、その両端が第二補鋼材6に取り付けられた支持ユニット60に支持されると共に、中央部が第一補鋼材5に取り付けられた支持ユニット51及び支柱70に支持されて、主桁1と平行をなして主桁1に支持される。この際、受け梁50は、第一補鋼材5の端縁より主桁1間の中心側に突出する位置にて第二補鋼材6同士の間に配されるように支持される(図3及び図4参照)。そして、各支持ユニット51,60並びに支柱70に設けられた高さ調整機構により、受け梁50が所望の高さで支持されるように高さ調整を行う。あるいは、高さ調整機構を適宜調整して、受け梁50の傾きを状況に応じて変化させる。
【0032】
そして、上述した逆三角形状の基本機構部20と両主桁1に支持された受け梁50との間は、大引き材22とは別の梁材30により連絡されている。この梁材30は、中空状の角パイプからなる本体31と、本体31の内部をその軸方向にスライドする支持アーム33とから構成されている。梁材30は、本体31の先端31aが主桁1に向けられるようにして基端31bが連結器24に連結される。そして、支持アーム33の先端部が主桁1に取り付けられた受け梁50に搭載される。なお、この梁材30は、支持アーム33を本体31に対して梁材の軸方向にスライドさせて梁材の長さを伸縮させるための手段と、所定の長さに調整された後に、支持アーム33を本体31に対して位置固定させる手段とが設けられている。
【0033】
図10は、支持アーム33が受け梁50に搭載されている状態を詳細に示す図である。この図10に示すように、角パイプからなる本体31の先端部の近傍には、側面部の上部と下部とに貫通孔32,32が形成されている。この貫通孔32,32は、後に説明するように、支持アームの位置固定手段として使用される。
【0034】
一方、支持アーム33は、断面形状が矩形に形成され、本体31に挿入される挿入部34と、板状に形成され、主桁1に向けて張り出す搭載部35とから構成されている。挿入部34の先端側には搭載部35に向かうにつれ下面が斜め上方に向けて傾く傾斜面が形成されており、搭載部35の下面と挿入部34の下面とはこの傾斜面により連絡されている。また、挿入部34の側面には軸方向に延びる長孔36〜40が、本体31に形成された貫通孔32,32に対応する高さに設けられている。なお、この実施形態では、上段に三つの長孔36,37,38が下段に二つの長孔39,40が形成されている。なお、この図10に示す状態では、支持アーム33は、梁材30の軸方向において、上段の長孔38が本体31の先端31aとほぼ同位置に配されるように本体31から突出されている。
【0035】
そして、支持アーム33に形成された長孔38には楔状の位置決め部材80が打ち込まれている。この位置決め部材80は、支持アーム33を本体31に対して軸方向にスライドさせて支持アーム33の本体31からの突出量を調整する際に使用される部材である。この楔状に形成された位置決め部材80の側縁の一方は、長孔38の先端部と当接する一方で、他方の側縁は本体31の先端31aに当接する。位置決め部材80は先端に向かうにつれ先細り状となるように両側縁が斜辺として形成されているので、当該位置決め部材80が長孔38へ深く挿入されるにしたがい、長孔38の先端側の内面と本体31の先端31aとの間は、この位置決め部材80によって間隔が引き離される。これにより、支持アーム33が本体31より突出され、梁材30の長さが伸張される。
【0036】
一方、長孔37,40には、本体31に対して支持アーム33を位置固定させる固定ボルト(不図示)が挿入される。この固定ボルトは、本体31に形成された貫通孔32,32と、支持アーム33の挿入部34に形成された、長孔37,40の双方に挿入され、本体31と支持アーム33とを相互に位置固定させる。このように、本体31と支持アーム33とが固定ボルトによって固定されることにより、長さ調整後の梁材は、その長さが維持される。
【0037】
この図10では、搭載部35に最も近い長孔38が、本体31の先端31aとほぼ同位置に位置するように支持アーム33が本体31から突出している状態で位置決め部材80を使用している状態を示しているが、この位置決め部材80の使用方法はこれに限定されるものではない。支持アーム33の本体31に対する突出量に応じ、長孔38以外の他の長孔36,37,39,40に位置決め部材80を挿入して、支持アーム33の本体31に対しする突出量を調整することもできる。
【0038】
このように、梁材30の長さを自在に伸縮させることができるため、主桁1同士の間隔が、主桁1の延びる方向において異なるように主桁1が設置されても、各地点毎に梁材30の長さをフレキシブルに対応させることができる。
【0039】
以上のように支持アーム33の本体31に対する突出量の調整された梁材30は、支持アーム33の搭載部35が受け梁50に搭載され、梁材30の一端が主桁1に支持される。なお、上述したように、受け梁50は、主桁1と平行をなして支持ユニット51,60及び支柱70に保持されているため、支持アーム33は、受け梁50の軸方向における所望の位置に搭載させることができる。
【0040】
なお、この支持機構では、主桁1と、梁材の本体31とをターンバックル41で連結している。ターンバックル41の一端は、この図10には示されていなが、補鋼材等に着脱自在に装着されている。他方、ターンバックル41の他端にはU字型のシャックル42が取り付けられており、シャックル42を本体31に装着させてターンバックル41の他端を本体31に連結させている。本体31の両側面には、本体31の内部に挿入された支持アーム33の挿入部34の端縁よりやや中心側に挿入孔がそれぞれ形成されている。これら挿入孔にシャックル42のピン43が挿入されて、シャックル42が本体31に装着される。このようにターンバックル41が主桁1と梁材の本体31とを連結することで、当初設置した位置から梁材30がずれてしまうことを防止すると共に、支持アーム33が本体31から抜け出してしまうことを防止する。
【0041】
また、当該固定型枠の支持機構において、図11に示すように、受け梁50と主桁1の腹板2との間にストッパ81を挿入するとよい。コンクリート床版9を打設すると、図12に示すようにコンクリート床版9の重みにより、梁材30に主桁1のある外側へ外力が作用し変位する。このため、支持ユニット51,60が主桁側へに曲げられるように変形してしまう。主桁1の延びる方向における所定の位置に、ストッパ81を受け梁50と腹板2との間に適宜挿入することで、このような変形を効果的に防止することができる。
【0042】
以上、梁材の長さを伸縮される機構として、内部が空洞である本体31に支持アーム33を挿入させ、本体31の内部で支持アーム33をスライドさせるタイプを例に説明したが、図13に示すように、本体91と支持アーム93とを上下に重ね合わせるようにして設けた機構を採用してもよい。なお、この実施の形態では、受け梁50の主桁に取り付け構造、並びに基本機構部20の構造は、上述の実施形態のものと同様であるため、同一部品については同符号を付して、その詳細な説明は省略する。
【0043】
この実施の形態についても、梁材90は基本機構部20と主桁1との間にて主桁1と直交するようにして配されている。梁材90は、本体91と、本体91の先端部にて本体91の軸方向と同方向に配された支持アーム93と、本体91に支持アーム93を保持する保持具95とから構成されている。支持アーム93は、本体91の軸方向に対して自在に移動させることができるように構成されており、本体91の先端91aから所定の寸法だけ突出させて本体に保持される。
【0044】
本体91は、角パイプなどの断面形状が矩形状に形成された部材が使用されている。この本体91は、その基端部91bが基本機構部20の連結器24に接続されて、先端91aが主桁1に向けられている。主桁側に向けられている本体91の先端91aにはその下縁の近傍にねじ孔92…92が形成されている。
【0045】
一方、支持アーム93は、本体91の先端部にて本体91の下面に密着するようにして、本体91の先端91aから主桁1に向けて延びている。この支持アーム93は上面が本体91の下面に取り付けられる基部93aと、基部93aの先端にて基部93aと一体的に設けられた搭載部93bとから形成されている。この支持アーム93の基部93aは横断面の形状が矩形状に形成されている一方で、搭載部93bは、基部93aの先端部の下部を矩形状に切り欠いて、その肉厚が薄く形成されている。基部93aの側面には、ねじ孔94…94が基部93aの上縁に沿って複数形成されている。
【0046】
そして、保持具95は、矩形状に形成された一対の保持板96と取付ボルト(不図示)とから構成されたジグである。保持板96の上縁近傍には、上縁に沿って複数の貫通孔97…97が形成されている。この貫通孔97…97のピッチは、本体の下縁近傍に形成されたねじ孔92…92のピッチと一致しており、これらの貫通孔97…97が本体91のねじ孔92…92に位置合わせされて本体91にボルト締めされる。また、保持板96の下縁近傍にも複数の貫通孔98…98が下縁に沿って形成されている。この貫通孔98…98のピッチは、支持アーム93に形成されているねじ孔94…94のピッチと一致されており、貫通孔98…98をねじ孔94…94の位置に一致させて支持アーム93にボルト締めされる。
【0047】
このような梁材90によれば、まず、本体91の基端部91bが連結器24により基本機構部20に連結され、先端91aが主桁1に向けられる。次いで、支持アーム93が適切に受け梁50に搭載されるよう、支持アーム93の本体91に対する位置が調整される。即ち、主桁1同士の間隔は、主桁1の延びる方向において異なることがあるため、その地点における間隔に対応させるように、支持アーム93は本体91の先端からの突出量が調整されて梁材90の長さが調整される。本体91の先端から突出させる支持アーム93の寸法が決定されると、保持板96の上縁に設けられた貫通孔97…97を本体91の側面に形成されたねじ孔92…92に一致させて保持板96を本体91に固着させると共に、支持アーム93の側面に形成された複数のねじ孔94…94の中から、これに対応する区間のねじ孔94…94が選択されて保持板96の貫通孔98…98とこれらねじ孔94…94とが一致される。その後、これらねじ孔92,94と貫通孔97,98にボルトが通されて、このボルトで両者が固着される。これにより、支持アーム93の搭載部93bが受け梁50の上に確実に搭載される。
【0048】
以上、主桁に対して直交する梁材が、基本機構部20を構成する大引き材、その両側方に配される梁材とから構成され、これらが分割可能に形成された場合を例に説明したが、これに限定されるものではなく、一本の梁材で構成された固定型枠の支持機構にも適用することができる。
【0049】
【発明の効果】
以上、本発明によれば、主桁と平行を成すようにして受け梁を設け、この受け梁上に梁材を搭載させる構成を採用しているため、主桁の延びる方向において、梁材を設置する位置が制限されない。また、梁材の長さを伸縮させることができるため、主桁の間隔を異なるようにして架設した場合でも、主桁の間隔に対応させることが可能である。このように、架設された主桁の状態に応じて臨機応変に固定型枠の支持機構を設置することができる。なお、梁材の長さを現場で調整する場合でも、本発明の固定型枠の支持機構では、極めて容易に調整できる。
【図面の簡単な説明】
【図1】本発明の一実施形態にかかる固定型枠の支持機構を主桁の延びる方向に対して直交する方向にみた図。
【図2】図1に示す固定型枠の支持機構が設置される主桁の一実施形態を示す一部切り欠き斜視図。
【図3】主桁に受け梁を取り付けた状態を示す、主桁の側面図。
【図4】受け梁の取り付けられた主桁を上方から見た図。
【図5】主桁に設置された支柱を主桁の延びる方向に対して直交する方向に見た図。
【図6】第一補鋼材に取り付けられた支持ユニットを主桁の延びる方向に対して直交する方向に見た図。
【図7】図6に示す支持ユニットを主桁の側方から見た図。
【図8】第二補鋼材に取り付けられた支持ユニットを主桁の延びる方向に対して直交する方向に見た図。
【図9】図6に示す支持ユニットを主桁の側方から見た図。
【図10】受け梁に梁材の先端部分を搭載させた状態の詳細を示す図。
【図11】受け梁と腹板の間にストッパを挿入させた状態を示す図。
【図12】ストッパを挿入させない場合に予想される支持ユニットの変形を示す説明図。
【図13】図1〜図12に示す実施形態とは別の実施形態にかかる固定型枠の支持機構の梁材先端部分の詳細を示す図。
【符号の説明】
1 主桁
2 腹板
5 第一補鋼材
6 第二補鋼材
10 横桁
11 縦桁
20 基本機構部
30,90 梁材
31,91 本体
33,93 支持アーム
51,60 各支持ユニット
70 支柱
74 ストッパ
80 位置決め部材
81 ストッパ
95 保持具
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support mechanism for a fixed mold used for placing a floor slab on a main girder.
[0002]
[Prior art]
In recent years, various methods have been developed in order to construct a bridge by placing a floor slab on a main girder. Among such techniques, a mechanism for supporting a fixed mold frame, which is installed between main girder extending in parallel, with respect to the main girder has been developed. One of the physical appearances is related to Patent Document 1 already disclosed by the present patent applicant. In the invention according to Patent Document 1, when supporting the beam material of the support mechanism for supporting the fixed form frame to the main girder, a beam material supporting jig is detachably attached to the abdominal plate constituting the main girder, The end of the beam is supported by the jig against the main girder.
[0003]
[Patent Document 1]
JP 2002-275829 A
[0004]
[Problems to be solved by the invention]
However, with such a mechanism, the beam material can be installed only at a predetermined position in the extending direction of the main beam. For this reason, it was difficult to change the support mechanism according to the situation of the bridge to be installed. Further, at the position where the interval between the main girders changes, the beam material itself must be selected in advance corresponding to the width thereof, and the versatility is poor.
[0005]
In view of this, the present invention provides a support mechanism for a fixed mold frame that can be easily dealt with depending on the situation of the bridge to be installed.
[0006]
[Means for Solving the Problems]
(1) The support mechanism of the fixed mold frame according to the present invention uses a reinforcing steel material provided to project laterally from the belly plate of the main girder at a predetermined interval in the extending direction of the main girder, A fixed mold frame support mechanism for supporting a fixed mold frame for placing a floor slab on the main girder,
A support unit detachably attached to the stiffener, a receiving beam supported by the support unit and extending parallel to the main girder, and an end portion supported by the receiving beam and extending in the direction of the main girder A beam material arranged in a crossing direction to support the fixed formwork,
The receiving unit of the support beam in the support unit is attached to the auxiliary steel material so that it protrudes from an edge of the auxiliary steel material. The beam material is provided with an expansion / contraction mechanism that can expand and contract its length. It is characterized by this.
According to the present invention, the receiving beam on which one end of the beam material is mounted is attached to the main beam in parallel with the main beam. For this reason, it is possible to mount one end of the beam material at a desired position in the axial direction of the receiving beam.
Moreover, even if it installs so that the space | interval between main girders may differ in the direction where a main girder extends, it can extend and extend a beam material to the length corresponding to each point, and can install a beam material. Thus, the support mechanism for the fixed mold according to the present invention can be a support mechanism that can be flexibly adapted to the situation where the main girder is installed.
[0007]
(2) Further, in the above-described (1), the expansion / contraction mechanism includes a main body of the beam material, an arm slidable in an axial direction of the beam material, and the arm and the main body of the beam material. And fixing means for fixing the position of the arm with respect to the beam member.
As described above, a complicated mechanism is not used as a mechanism for expanding and contracting the length of the beam material, but a mechanism that simply slides the arm with respect to the main body of the beam material is employed. The beam material can be easily expanded and contracted even at the construction site.
[0008]
(3) Further, in the above (1) or (2), a support column that supports the receiving beam between the steel members is erected on the lower flange of the main girder.
According to the present invention, it is possible to prevent an excessive load from being applied to the support unit and the reinforcing steel material, and to effectively prevent the receiving beam from being bent.
[0009]
(4) Further, a fixed formwork for placing a slab is formed by using a reinforcing steel material that protrudes laterally from the belly plate of the main girder at predetermined intervals in the direction in which the main girder extends. A support mechanism for a fixed mold frame supported by the main beam,
A support unit detachably attached to the stiffener, a receiving beam supported by the support unit and extending parallel to the main girder, and an end portion supported by the receiving beam and extending in the direction of the main girder A beam material arranged in a crossing direction to support the fixed formwork, A column that is erected on a lower flange of the main girder between the stiffeners and supports the receiving beam With
The receiving unit of the support beam in the support unit is attached to the auxiliary steel material so as to protrude from an end edge of the auxiliary steel material.
According to the present invention, the receiving beam on which one end of the beam material is mounted is attached to the main beam in parallel with the main beam. For this reason, it is possible to mount one end of the beam material at a desired position in the axial direction of the receiving beam.
In addition, it is possible to prevent an excessive load from being applied to the support unit and the auxiliary steel material, and to effectively prevent the receiving beam from being bent.
[0010]
(5) Further, in the above (4), the column is provided with a height adjusting means for adjusting the height of the receiving beam supported by the column.
In this way, by providing the height adjusting means, the height of the supported receiving beam is adjusted, so that a gap is formed between the beam material and the receiving beam, or the receiving beam is unwilling. Inclination can be prevented. On the other hand, it is also possible to intentionally tilt the receiving beam.
[0011]
(6) Further, in any of the above (1) to (5), the support unit is provided with a height adjusting means for adjusting the height of the receiving beam supported by them. It is what.
In this way, by providing the height adjusting means, the height of the supported receiving beam is adjusted, so that a gap is formed between the beam material and the receiving beam, or the receiving beam is unwilling. Inclination can be prevented. On the other hand, it is also possible to intentionally tilt the receiving beam.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 shows a support mechanism for a fixed mold according to an embodiment of the present invention. This support mechanism for the fixed mold is for supporting the fixed mold used for placing the concrete floor slab 9 of the bridge on the main girders 1 and 1. First, the bridge will be described. The bridge is arranged between a pair of main girders 1 and 1 supported by pillars (not shown) and the main girders 1 and 1 and connecting these main girders 1 and 1. 10. The concrete floor slab 9 is placed on top of these main girders 1 and 1.
[0015]
The pair of main girders 1 and 1 are supported by support columns (not shown) so as to extend in parallel with each other. Each main girder 1 includes a belt-shaped belly plate 2 having a predetermined height, an upper flange 3 projecting in the thickness direction of the belly plate 2 at the upper end of the belly plate 2, and a thickness direction at the lower end of the belly plate 2. And a lower flange 4 projecting over. The cross beam 10 is configured to connect the abdominal plates 2 of the main beams 1 and 1, and the basic configuration is the same as the main beams 1 and 1, the abdominal plate 10 a having a predetermined height, The upper flange 10b extends in the thickness direction from the upper end of the abdominal plate 10a, and the lower flange 10c extends in the thickness direction from the lower end.
[0016]
Further, as shown in FIG. 2, a plurality of reinforcing steel materials 5, 6 are arranged on surfaces of the main girders 1, 1 so as to be orthogonal to the belly plate 2. Overhangs. These reinforcing steel members 5 and 6 are members for increasing the strength and rigidity of the main girder 1 and are provided so as to communicate the upper flange 3 and the lower flange 4. There are two types of reinforcing steel materials 5 and 6 with different overhang lengths. The first supplementary steel materials 5 having a small overhang amount are arranged in a direction in which the main girder 1 extends at a pitch where the distance between them is narrow, while the second supplementary steel materials 6 having a large overhang amount are equal to the number of the first supplementary steel materials. It is arranged for each pitch corresponding to the pitch. Further, the belly plate 2 is provided with a horizontal reinforcing steel material 7 extending horizontally between the reinforcing steel materials 5 and 6. This horizontal reinforcing steel material 7 is also a member for improving the strength and rigidity of the main beam 1.
[0017]
The concrete floor slab 9 is placed so as to be supported on the upper surface of the upper flange 3 of the main girders 1 and 1 as indicated by a two-dot chain line in FIG. The concrete floor slab 9 to be placed is placed so that both side portions of the concrete floor slab project outward from the main girders 1 and 1. The concrete slab 9 is formed so that the portion between the main girders 1 and 1 is formed with a constant thickness, and the portion supported by the main girders 1 and 1 where the greatest moment is generated has the thickest thickness. The The outer portions of the main girders 1 and 1 are formed such that the lower surfaces thereof are inclined so that the thickness thereof becomes thinner toward the outside.
[0018]
The support mechanism according to this embodiment is for supporting a portion between the main girders 1 and 1 from below among the fixed molds for forming the concrete floor slab 9. A fixed mold is also installed on the outer side of each of the main girders 1 and 1, and means for supporting the fixed mold is installed, but the description thereof is omitted here.
[0019]
As shown in FIG. 1, the support mechanism installed between the main girders 1 and 1 is a vertical girder 11 extending in parallel with the main girders 1 and 1 at the center position between the main girders 1 and 1. It has an inverted triangular basic mechanism portion 20 held by the stringer 11 so as to be arranged between the stringer 11 and the fixed formwork.
[0020]
The vertical beam 11 is attached to the lower surface of the lower flange 10c of the horizontal beam 10 so that the horizontal beams 10 communicate with each other at the center of each horizontal beam 10. The stringer 11 is made of H-shaped steel, and is composed of a strip-shaped flat plate portion 11a having a predetermined height and flange portions 11b and 11c projecting in the thickness direction at the upper and lower ends of the flat plate portion 11a. Has been.
[0021]
On the other hand, a plurality of basic mechanism sections 20 are arranged at predetermined intervals in the axial direction of the vertical beam 11 at a portion between the horizontal beams 10. Each basic mechanism portion 20 includes a pair of pipe supports 21 and 21 attached so as to expand outward from the upper flange 3 of the stringer 11 toward the upper side, and the pipe supports 21 and 21 in the axial direction. And a large pulling member 22 as a beam member supported at both ends. In addition, a pair of holders 23, 23 detachably attached to the upper flange 11 b are attached to the stringer 11, and the basic mechanism unit 20 is attached to the stringer 11 by the holders 23, 23. The large pulling material 22 is formed of a square pipe, and both ends thereof are supported by the pipe supports 21 and 21 via the couplers 24 and 24. The couplers 24 and 24 are provided with a height adjusting mechanism (not shown) for adjusting the height of the large pulling material 22 so that the height and inclination of the large pulling material 22 can be freely adjusted. It is configured.
[0022]
Next, a mechanism for attaching the receiving beam 50 for receiving the beam material to the main beam 1 will be described with reference to FIGS.
[0023]
As described above, the web 2 of the main beam 1 is provided with a plurality of reinforcing steel materials 5 and 6 at predetermined intervals in the direction in which the main beam 1 extends. As shown in FIGS. 3 and 4, support units 51 and 60 for receiving the receiving beam 50 are attached to these reinforcing steel members 5 and 6, respectively. As shown in FIGS. 6 and 7 in which the portion A of FIG. 3 is enlarged, the first reinforcing steel material 5 with a small overhang is projected from the edge toward the center side of the main girders 1. Support units 51 are respectively attached. On the other hand, as shown in FIG. 8 and FIG. 9 in which the portion B of FIG. 3 is enlarged, the second supplementary steel material 6 with a large overhang is secondly sandwiched from both sides of the plate thickness. These are attached so as to protrude from the steel reinforcing material 6 in the extending direction of the main beam 1. Further, a support column 70 that supports the receiving beam 50 is disposed separately from the support units 51 and 60 between the reinforcing steel members. The receiving beam 50 is disposed between the second reinforcing steel members 6 having a large overhang amount so as to be parallel to the main beam 1.
[0024]
A plurality of support tools 100 are attached to the outer surface side of the abdominal plate 2. The support 100 is a jig used when a support mechanism is installed on the outer side of the main beam 1.
[0025]
As shown in FIGS. 6 and 7, the support unit 51 attached to the first supplemental steel material 5 includes a plate-like attachment plate 52 that is bolted along the first supplementary steel material 5, and the attachment plate 52. The base portion 53 projects horizontally from the tip, and two receiving portions 55 and 55 attached to the base portion 53 and supporting the receiving beam 50 from below.
[0026]
Two holes 52a and 52a are formed in the mounting plate 52 so as to be arranged vertically. The mounting plate 52 is attached to the first reinforcing steel member 5 by aligning these holes 52a and 52a with the screw holes of the first reinforcing steel member 5 and screwing the bolts. Further, the base portion 53 is joined to the mounting plate 52 so as to protrude from the edge of the first reinforcing steel material 5 toward the center side of the main girders 1 and to be integrated with the mounting plate 52. In the base portion 53, two through holes are formed at the center side positions of the main girders 1 by a predetermined dimension from the edge of the first reinforcing steel material 5. These through holes are formed on one side and the other side of the first reinforcing steel material 5 with the first reinforcing steel material 5 positioned therebetween. Further, nuts 54 and 54 are joined to the back surface of the base portion 53 at positions where these through holes are formed. Each receiving portion 55 attached to the base portion 53 is provided on a screw member 56 that is screwed into the nut 54 so as to vertically penetrate the base portion 53, and an upper end of the screw member 56. It is comprised from the saucer 57 in which the receiving beam 50 is mounted. The receiving portion moves the receiving tray 57 up and down by rotating the screw member 56 with respect to the nut 54.
[0027]
On the other hand, as shown in FIGS. 8 and 9, the support unit 60 attached to the second reinforcing steel member 6 supports the end portion of the receiving beam 50, and is bolted along the second reinforcing steel member 6. An L-shaped mounting plate 61, a base portion 62 that extends horizontally from the mounting plate 61 and protrudes in the extending direction of the main beam 1, and is attached to the base portion 62 and supports the receiving beam 50 from below. The receiving part 64 is comprised.
[0028]
The mounting plate 61 is formed so that two holes 61c and 61c are vertically arranged in the base 61a. The mounting plate 61 has an L-shaped protruding portion 61b directed toward the center of the main girders 1, and these holes 61c and 61c are aligned with the screw holes of the second reinforcing steel member 6 and are bolted to make a second auxiliary member. It is attached to the steel material 6. The base portion 62 is joined to the protruding portion 61 b of the mounting plate 52 so as to be integrated with the mounting plate 61. A through-hole is formed in the base portion 62 at a position away from the mounting plate 61 by a predetermined dimension toward the center side of the main girders 1. A nut 63 is joined to the back surface of the base portion 62 at a position where a through hole is formed. And the receiving part 64 attached to the base part 62 is provided at the upper end of the screw member 65 provided so as to be screwed into the nut 63 so as to penetrate the base part 62 up and down. It is comprised from the saucer 66 in which the beam 50 is mounted. The receiving part 64 moves the receiving plate 66 up and down by rotating the screw member 65 with respect to the nut 63.
[0029]
As is clear from FIG. 9, the pair of support units 60 and 60 are attached to the second reinforcing steel material 6 in a state of being back to back with the second reinforcing steel material 6 interposed therebetween.
[0030]
On the other hand, as shown in FIG. 5, the strut 70 disposed between the reinforcing steel members includes a base 71 supported by the lower flange 4 of the main girder 1, a rod 72 that expands and contracts vertically with respect to the base 71, It is comprised from the saucer 73 attached to the upper end of the rod 72 and in which the receiving beam 50 is mounted. The base portion 71 is formed of a pipe material having an inside formed in a hollow, and the rod 72 is configured to be inserted into the base portion 71. In addition, a stopper 74 is provided at the upper end of the base 71 to hold the rod 72 that is expanded and contracted with respect to the base 71 in a desired position. Thus, since the support | pillar 70 is comprised, the height of the saucer 73 in which the receiving beam 50 is mounted can be adjusted freely. In addition, this support | pillar 70 is distribute | arranged so that it may be located on the same straight line as the line | wire which connects the support units 51 and 60 attached to each supplementary steel materials 5 and 6. FIG.
[0031]
The receiving beam 50 is supported at both ends by a support unit 60 attached to the second reinforcing steel material 6 and at the center by a support unit 51 and a support column 70 attached to the first reinforcing steel material 5. The main beam 1 is supported in parallel with the main beam 1. At this time, the receiving beam 50 is supported so as to be arranged between the second reinforcing steel members 6 at a position protruding from the edge of the first reinforcing steel material 5 toward the center between the main girders 1 (FIG. 3). And FIG. 4). Then, the height adjustment mechanism provided in each of the support units 51 and 60 and the column 70 adjusts the height so that the receiving beam 50 is supported at a desired height. Alternatively, the height adjusting mechanism is appropriately adjusted to change the inclination of the receiving beam 50 according to the situation.
[0032]
The above-described inverted triangular basic mechanism portion 20 and the receiving beam 50 supported by the two main girders 1 are connected to each other by a beam material 30 different from the large pulling material 22. The beam member 30 includes a main body 31 formed of a hollow square pipe and a support arm 33 that slides in the axial direction inside the main body 31. The beam member 30 has a base end 31 b connected to the coupler 24 such that the tip 31 a of the main body 31 faces the main beam 1. Then, the distal end portion of the support arm 33 is mounted on the receiving beam 50 attached to the main girder 1. The beam member 30 has a means for sliding the support arm 33 in the axial direction of the beam member with respect to the main body 31 to expand and contract the length of the beam member, and is supported after being adjusted to a predetermined length. Means for fixing the position of the arm 33 with respect to the main body 31 are provided.
[0033]
FIG. 10 is a diagram showing in detail a state in which the support arm 33 is mounted on the receiving beam 50. As shown in FIG. 10, through-holes 32 and 32 are formed in the upper part and the lower part of the side part in the vicinity of the front end part of the main body 31 made of a square pipe. The through holes 32 are used as position fixing means for the support arm, as will be described later.
[0034]
On the other hand, the support arm 33 has a rectangular cross-sectional shape, and includes an insertion portion 34 that is inserted into the main body 31 and a mounting portion 35 that is formed in a plate shape and projects toward the main beam 1. An inclined surface whose lower surface is inclined obliquely upward as it goes toward the mounting portion 35 is formed on the distal end side of the insertion portion 34, and the lower surface of the mounting portion 35 and the lower surface of the insertion portion 34 are connected by this inclined surface. Yes. Further, long holes 36 to 40 extending in the axial direction are provided on the side surface of the insertion portion 34 at a height corresponding to the through holes 32 and 32 formed in the main body 31. In this embodiment, three long holes 36, 37, 38 are formed in the upper stage, and two long holes 39, 40 are formed in the lower stage. In the state shown in FIG. 10, the support arm 33 protrudes from the main body 31 so that the upper long hole 38 is arranged at substantially the same position as the tip 31 a of the main body 31 in the axial direction of the beam member 30. Yes.
[0035]
A wedge-shaped positioning member 80 is driven into the long hole 38 formed in the support arm 33. The positioning member 80 is a member used when the support arm 33 is slid in the axial direction with respect to the main body 31 to adjust the protruding amount of the support arm 33 from the main body 31. One of the side edges of the positioning member 80 formed in a wedge shape is in contact with the distal end portion of the long hole 38, while the other side edge is in contact with the distal end 31 a of the main body 31. Since the positioning member 80 is formed as a hypotenuse on both sides so as to taper toward the tip, the positioning member 80 and the inner surface on the tip side of the slot 38 are inserted as the positioning member 80 is inserted deeply into the slot 38. The positioning member 80 separates the distance from the tip 31a of the main body 31. Thereby, the support arm 33 protrudes from the main body 31, and the length of the beam member 30 is extended.
[0036]
On the other hand, a fixing bolt (not shown) for fixing the position of the support arm 33 with respect to the main body 31 is inserted into the long holes 37 and 40. The fixing bolt is inserted into both the through holes 32 and 32 formed in the main body 31 and the long holes 37 and 40 formed in the insertion portion 34 of the support arm 33, and the main body 31 and the support arm 33 are mutually connected. To fix the position. In this way, the length of the beam material after the length adjustment is maintained by fixing the main body 31 and the support arm 33 with the fixing bolt.
[0037]
In FIG. 10, the positioning member 80 is used in a state where the support arm 33 protrudes from the main body 31 so that the long hole 38 closest to the mounting portion 35 is located at substantially the same position as the tip 31 a of the main body 31. Although the state is shown, the method of using the positioning member 80 is not limited to this. In accordance with the amount of protrusion of the support arm 33 relative to the main body 31, the positioning member 80 is inserted into the other long holes 36, 37, 39, 40 other than the long hole 38 to adjust the amount of protrusion of the support arm 33 relative to the main body 31. You can also
[0038]
Thus, since the length of the beam member 30 can be freely expanded and contracted, even if the main beam 1 is installed so that the interval between the main beams 1 is different in the extending direction of the main beam 1, for each point. In addition, the length of the beam member 30 can be flexibly accommodated.
[0039]
As described above, in the beam member 30 in which the protrusion amount of the support arm 33 with respect to the main body 31 is adjusted, the mounting portion 35 of the support arm 33 is mounted on the receiving beam 50, and one end of the beam member 30 is supported by the main girder 1. . As described above, since the receiving beam 50 is held by the support units 51 and 60 and the support column 70 in parallel with the main beam 1, the support arm 33 is positioned at a desired position in the axial direction of the receiving beam 50. Can be mounted on.
[0040]
In this support mechanism, the main beam 1 and the beam material main body 31 are connected by a turnbuckle 41. Although one end of the turnbuckle 41 is not shown in FIG. 10, it is detachably attached to a reinforcing steel material or the like. On the other hand, a U-shaped shackle 42 is attached to the other end of the turnbuckle 41. The shackle 42 is attached to the main body 31 and the other end of the turnbuckle 41 is connected to the main body 31. On both side surfaces of the main body 31, insertion holes are formed on the center side slightly from the edge of the insertion portion 34 of the support arm 33 inserted into the main body 31. The pins 43 of the shackle 42 are inserted into these insertion holes, and the shackle 42 is attached to the main body 31. In this way, the turnbuckle 41 connects the main beam 1 and the main body 31 of the beam material, thereby preventing the beam material 30 from being displaced from the position where it was originally installed, and the support arm 33 coming out of the main body 31. To prevent it.
[0041]
Further, in the support mechanism for the fixed mold, a stopper 81 may be inserted between the receiving beam 50 and the belly plate 2 of the main girder 1 as shown in FIG. When the concrete floor slab 9 is placed, as shown in FIG. 12, due to the weight of the concrete floor slab 9, an external force acts on the beam member 30 to the outside where the main girder 1 is located and is displaced. For this reason, the support units 51 and 60 are deformed so as to be bent toward the main girder. By appropriately inserting the stopper 81 between the receiving beam 50 and the belly plate 2 at a predetermined position in the extending direction of the main beam 1, such deformation can be effectively prevented.
[0042]
As described above, as a mechanism for expanding and contracting the length of the beam member, the type in which the support arm 33 is inserted into the main body 31 having a hollow inside and the support arm 33 is slid inside the main body 31 has been described as an example. As shown in FIG. 4, a mechanism provided by superimposing the main body 91 and the support arm 93 vertically may be employed. In this embodiment, the attachment structure to the main girder of the receiving beam 50 and the structure of the basic mechanism portion 20 are the same as those of the above-described embodiment. Detailed description thereof is omitted.
[0043]
Also in this embodiment, the beam member 90 is arranged between the basic mechanism portion 20 and the main beam 1 so as to be orthogonal to the main beam 1. The beam member 90 includes a main body 91, a support arm 93 disposed at the tip of the main body 91 in the same direction as the axial direction of the main body 91, and a holder 95 that holds the support arm 93 on the main body 91. Yes. The support arm 93 is configured to be freely movable with respect to the axial direction of the main body 91, and is supported by the main body 91 by protruding from the tip 91 a of the main body 91 by a predetermined dimension.
[0044]
For the main body 91, a member such as a square pipe having a rectangular cross-sectional shape is used. The main body 91 has a base end portion 91 b connected to the coupler 24 of the basic mechanism portion 20 and a tip end 91 a directed to the main beam 1. Screw holes 92... 92 are formed in the vicinity of the lower edge of the tip 91a of the main body 91 directed to the main girder side.
[0045]
On the other hand, the support arm 93 extends from the tip 91 a of the main body 91 toward the main beam 1 so as to be in close contact with the lower surface of the main body 91 at the tip of the main body 91. The support arm 93 includes a base portion 93a attached to the lower surface of the main body 91 and a mounting portion 93b provided integrally with the base portion 93a at the tip of the base portion 93a. The base portion 93a of the support arm 93 is formed in a rectangular shape in cross section, while the mounting portion 93b is formed in a thin shape by cutting out the lower portion of the tip portion of the base portion 93a into a rectangular shape. ing. A plurality of screw holes 94 ... 94 are formed on the side surface of the base portion 93a along the upper edge of the base portion 93a.
[0046]
The holder 95 is a jig composed of a pair of holding plates 96 and mounting bolts (not shown) formed in a rectangular shape. In the vicinity of the upper edge of the holding plate 96, a plurality of through holes 97... 97 are formed along the upper edge. The pitch of the through holes 97... 97 coincides with the pitch of the screw holes 92... 92 formed near the lower edge of the main body, and these through holes 97. Combined and bolted to the main body 91. A plurality of through holes 98... 98 are also formed along the lower edge in the vicinity of the lower edge of the holding plate 96. The pitch of the through holes 98... 98 is the same as the pitch of the screw holes 94... 94 formed in the support arm 93. Bolted to 93.
[0047]
According to such a beam member 90, first, the proximal end portion 91 b of the main body 91 is connected to the basic mechanism portion 20 by the coupler 24, and the distal end 91 a is directed to the main beam 1. Next, the position of the support arm 93 with respect to the main body 91 is adjusted so that the support arm 93 is appropriately mounted on the receiving beam 50. That is, the distance between the main girders 1 may differ in the direction in which the main girders 1 extend. The length of the material 90 is adjusted. When the dimensions of the support arm 93 protruding from the front end of the main body 91 are determined, the through holes 97... 97 provided on the upper edge of the holding plate 96 are made to coincide with the screw holes 92. The holding plate 96 is fixed to the main body 91, and the corresponding screw hole 94... 94 is selected from the plurality of screw holes 94 formed on the side surface of the support arm 93. The through holes 98... 98 and the screw holes 94. Thereafter, bolts are passed through the screw holes 92 and 94 and the through holes 97 and 98, and both are fixed by the bolts. Thereby, the mounting portion 93 b of the support arm 93 is securely mounted on the receiving beam 50.
[0048]
As described above, the beam material orthogonal to the main girder is composed of the large pulling material constituting the basic mechanism portion 20 and the beam material arranged on both sides thereof, and the case where these are formed to be separable is taken as an example. Although described, it is not limited to this, It can apply also to the support mechanism of the fixed form frame comprised with one beam material.
[0049]
【The invention's effect】
As described above, according to the present invention, since the receiving beam is provided so as to be parallel to the main beam and the beam material is mounted on the receiving beam, the beam material is used in the extending direction of the main beam. The installation position is not restricted. Further, since the length of the beam member can be expanded and contracted, it is possible to correspond to the interval between the main beams even when the beams are installed with different intervals between the main beams. Thus, the support mechanism for the fixed mold can be installed flexibly according to the state of the main girder installed. Even when the length of the beam material is adjusted on site, it can be adjusted very easily with the support mechanism for the fixed mold of the present invention.
[Brief description of the drawings]
FIG. 1 is a view of a support mechanism for a fixed mold according to an embodiment of the present invention as viewed in a direction perpendicular to a direction in which a main beam extends.
FIG. 2 is a partially cutaway perspective view showing an embodiment of a main girder in which the support mechanism for the fixed mold shown in FIG. 1 is installed.
FIG. 3 is a side view of a main girder showing a state where a receiving beam is attached to the main girder.
FIG. 4 is a top view of a main girder to which a receiving beam is attached.
FIG. 5 is a view of a column installed on a main beam viewed in a direction orthogonal to the direction in which the main beam extends.
FIG. 6 is a view of the support unit attached to the first reinforcing steel material as viewed in a direction perpendicular to the direction in which the main beam extends.
7 is a view of the support unit shown in FIG. 6 as viewed from the side of the main beam.
FIG. 8 is a view of the support unit attached to the second reinforcing steel material as seen in a direction orthogonal to the direction in which the main beam extends.
9 is a view of the support unit shown in FIG. 6 as viewed from the side of the main beam.
FIG. 10 is a diagram showing details of a state in which a tip portion of a beam material is mounted on a receiving beam.
FIG. 11 is a view showing a state where a stopper is inserted between the receiving beam and the abdominal plate.
FIG. 12 is an explanatory diagram showing a deformation of the support unit that is expected when the stopper is not inserted.
FIG. 13 is a diagram showing details of a beam member tip portion of a support mechanism for a fixed mold according to an embodiment different from the embodiment shown in FIGS. 1 to 12;
[Explanation of symbols]
1 Main digit
2 Abdomen
5 First steel supplement
6 Second supplementary steel
10 horizontal girder
11 Column
20 Basic mechanism
30,90 Beam material
31,91 body
33, 93 Support arm
51, 60 each support unit
70 props
74 Stopper
80 Positioning member
81 Stopper
95 Holder

Claims (6)

主桁の延びる方向における所定の間隔毎に、前記主桁の腹板から側方に張り出させて設けた補鋼材を利用して、床版打設用の固定型枠を前記主桁に支持させる固定型枠の支持機構であって、
前記補鋼材に着脱可能に取り付けられた支持ユニットと、該支持ユニットに支持されて前記主桁と平行に延びる受け梁と、該受け梁に端部が支持されて前記主桁の延びる方向に対して交わる方向に配されて前記固定型枠を支持する梁材と、を備え、
前記支持ユニットにおける前記受け梁の受け部が前記補鋼材の端縁より突出されるように前記補鋼材に取り付けられていると共に前記梁材に、その長さを伸縮可能にする伸縮機構を設けたことを特徴とする固定型枠の支持機構。
A fixed formwork for floor slab placement is supported on the main girder by using a reinforcing steel material that protrudes laterally from the belly plate of the main girder at predetermined intervals in the direction in which the main girder extends. A support mechanism for a fixed formwork,
A support unit detachably attached to the stiffener, a receiving beam supported by the support unit and extending parallel to the main girder, and an end portion supported by the receiving beam and extending in the direction of the main girder A beam material arranged in a crossing direction to support the fixed formwork,
The receiving unit of the support beam in the support unit is attached to the auxiliary steel material so that it protrudes from the end edge of the auxiliary steel material, and the beam material is provided with an expansion / contraction mechanism that can expand and contract its length. A support mechanism for a fixed formwork.
伸縮機構は、前記梁材の本体と、前記梁材の軸方向に対してスライド可能なアームと、このアームと前記梁材の本体とを係り合わせて前記アームを前記梁材に対して位置固定させる固定手段とから構成されていることを特徴とする請求項1に記載の固定型枠の支持機構。  The telescopic mechanism includes a main body of the beam material, an arm slidable with respect to the axial direction of the beam material, and the arm and the main body of the beam material are engaged to fix the position of the arm to the beam material. The fixed mold frame supporting mechanism according to claim 1, wherein the fixed mold frame supporting mechanism is configured to be fixed. 補鋼材の間に受け梁を支持する支柱を、主桁の下フランジに立設したことを特徴とする請求項1または2に記載の固定型枠の支持機構。  The support mechanism for the fixed mold frame according to claim 1 or 2, wherein a support column for supporting the receiving beam between the steel reinforcing members is erected on the lower flange of the main girder. 主桁の延びる方向における所定の間隔毎に、前記主桁の腹板から側方に張り出させて設けた補鋼材を利用して、床版打設用の固定型枠を前記主桁に支持させる固定型枠の支持機構であって、
前記補鋼材に着脱可能に取り付けられた支持ユニットと、該支持ユニットに支持されて前記主桁と平行に延びる受け梁と、該受け梁に端部が支持されて前記主桁の延びる方向に対して交わる方向に配されて前記固定型枠を支持する梁材と、前記補鋼材の間における前記主桁の下フランジに立設されて前記受け梁を支持する支柱と、を備え、
前記支持ユニットにおける前記受け梁の受け部が前記補鋼材の端縁より突出されるように前記補鋼材に取り付けられていることを特徴とする固定型枠の支持機構。
A fixed formwork for floor slab placement is supported on the main girder by using a reinforcing steel material that protrudes laterally from the belly plate of the main girder at predetermined intervals in the direction in which the main girder extends. A support mechanism for a fixed formwork,
A support unit detachably attached to the stiffener, a receiving beam supported by the support unit and extending parallel to the main girder, and an end portion supported by the receiving beam and extending in the direction of the main girder A beam material that is arranged in a crossing direction and supports the fixed formwork, and a column that is erected on a lower flange of the main girder between the steel members to support the receiving beam ,
A support mechanism for a fixed mold frame, wherein the support portion is attached to the auxiliary steel member such that a receiving portion of the receiving beam protrudes from an end edge of the auxiliary steel material.
支柱に、該支柱に支持される受け梁の高さを調整する高さ調整手段を備えたことを特徴とする請求項4に記載の固定型枠の支持機構。  5. The support mechanism for a fixed mold according to claim 4, wherein the support is provided with a height adjusting means for adjusting the height of the receiving beam supported by the support. 支持ユニットには、これらにより支持される受け梁の高さを調整する高さ調整手段を備えたことを特徴とする請求項1〜5のいずれか一項に記載の固定型枠の支持機構。  The support mechanism for a fixed mold according to any one of claims 1 to 5, wherein the support unit is provided with a height adjusting means for adjusting the height of the receiving beam supported by them.
JP2003166889A 2003-06-11 2003-06-11 Support mechanism for fixed formwork Expired - Fee Related JP3932287B2 (en)

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CN107630406A (en) * 2017-09-26 2018-01-26 中建五局土木工程有限公司 For steel structure bridge without support aerial assembled piece adjusting means and construction method

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CN117488700B (en) * 2023-12-28 2024-04-12 中铁四局集团有限公司 Steel box girder assembly jig frame structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107630406A (en) * 2017-09-26 2018-01-26 中建五局土木工程有限公司 For steel structure bridge without support aerial assembled piece adjusting means and construction method

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