JP3613627B2

JP3613627B2 - Metal sheet bending tool

Info

Publication number: JP3613627B2
Application number: JP14549195A
Authority: JP
Inventors: 村純一木
Original assignee: 有限会社東北エスパル
Priority date: 1995-05-18
Filing date: 1995-05-18
Publication date: 2005-01-26
Anticipated expiration: 2020-01-26
Also published as: JPH08309440A

Description

【０００１】
【発明の目的】
この発明は、金属薄板、特に屋根葺き用金属薄板等の折曲加工に便利な加工用具に関するものであり、金属薄板の一部を所定巾で所望する角度に簡単に折曲加工できるようにする新規な構造の金属薄板折曲加工用具を提供しようとするものである。
【０００２】
【従来技術】
最近の住宅建築等の屋根葺き材としては、軽量で作業性が良く、安価でしかも塗装技術が進んで耐久性と共に意匠効果上からも格段に秀れたものが提供されるようになったこと等の理由からか、伝統的な瓦やスレート板に代わって、金属薄板が全国的に繁用されるようになってきている。
この金属薄板を屋根葺き材とした作業で欠かせない作業が、継ぎ手となるハゼ巻き構造や重なり部の水切り構造のための折曲加工、あるいは瓦棒構造のための立ち上げ部分の折曲加工、あるいはまた雨仕舞のための各種折曲加工等のような単位金属薄板側縁所定巾部分を所望する角度に折曲加工する作業であり、工事現場、それも屋根葺き工事箇所面でそれらの作業を迅速且つ適格に作業するには相当の年季を必要とする。
【０００３】
しかし、次第に熟練した板金加工職人の数が減りつつある現在では、現場加工の割合を幾らかでも少なくできるよう、屋根葺き用の金属薄板の構造も極力工場加工の利くものへと改良され、標準的な屋根葺き作業だけであれば、それら金属薄板相互を、加工済みのジョイント部で互いに継合させていくだけの作業で済ますことができる程となっていて、特に現場での切断、折曲加工等を必要としない筈だが、実際の屋根葺き現場では、その標準的な屋根葺き作業で済まされる箇所の周辺部には、例えば棟部や谷部、あるいはケラバ部や出隅入り隅等と入った特殊な構造や平面形の箇所、あるいはサイズの半端な箇所等が必ず存在することとなって、単に標準的な葺き上げ作業だけでは済まなくなり、結局、屋根葺き現場において、工場加工されて搬入してある金属薄板を、その現場の状況に応じた形状、サイズのものに切断、折曲加工するようにする作業は、どの屋根葺き現場にも必ず着いて回るのが普通である。
【０００４】
従来の作業では、そのような役物（特殊な施工箇所に使用する物）の中、笠木用、ケラバ用、鼻隠し用等といった既成部品化の可能なものは別として、サイズを摘めたり、異形部材へ加工するには、先ず金切り鋏を使って所定の形状、サイズのものに形成し、更に水切り部材のような所定巾の立ち上げ片を形成するには、折曲箇所に罫書きをした上、その下に角材を敷いてそのコーナーが罫書き箇所の下に位置するようにし、そのコーナーをガイドとしながら手で概略下方に向けて押し曲げてから、最後にその押し曲げられた部分を、叩き棒等で外側から角材面に向けて叩き、所定角度に折り曲げられた役物に形成する工程を必要としていたことから、何よりも正しく直線状に折り曲げる上でかなりの熟練度を必要とした上、工事屋根面等の傾斜面での作業がし難く、更には騒音を発して辺りに迷惑を掛けてしまうといった幾つかの不都合を伴っていた。
【０００５】
本願出願人は、このような状況に鑑み、既に図９の使用状態における正面図および図１０の折曲加工所期の段階の使用状態における正面図に示すような金属薄板折曲加工用工具を開発、実用化し、これまでに多くの板金加工業者から広く採用され、従前までの折曲加工作業に比較し、極めて効率的で特別な技能を必要としない折曲用工具として高い評価を得てきた。
この既に開発済みの金属薄板折曲加工用工具は、図からも解るとおり、平行させた２本のロッド１′，３′各先端に軸着した誘導用回転ローラ２′および案内用回転ローラ４′が、共に円盤状部材からなるものに形成され、各回転ローラ２′、４′の間には、誘導用回転ローラ２′を軸着するロッド１′の内側面に略平行するようにした操作間隙部５′が形成され、且つ各回転ローラ２′、４′個々の底面が該操作間隙部５′を挟んで揃うよう、各回転ローラ２′、４′個々の回転軸が、各回転ローラ２′、４′を構成する円盤状部材の厚さおよび直径に応じた位置に規制して配されようにしたものであった。
【０００６】
その結果、円盤状部材からなる各回転ローラ２′および４′は、夫々を軸着するロッド１′および３′に直交状配置で各底面が同一平面状に揃った構成となり、できるだけ誘導用回転ローラ２′の径を小さめのものに形成したとしたとしても、構造上からは自ずと限界があり、したがって、金属薄板Ｍの折り始め段階に、該誘導用回転ローラ２′を金属薄板Ｍの下面側所定位置に差し込もうとすると、図１０に示すように、金属薄板Ｍの下に適当な角材Ｗを介して下方に空間を作ってからでなければ作業できないという問題を有すると共に、折り曲げ片Ｍ１を理論上で最大でも９０°まで、実用上では金属薄板Ｍの弾性に災いされて９０°の折曲角度が実現し得ないという難点を抱えていた。
この発明では、こうした従前のものが抱える課題に対処すべく、鋭意開発、研究を継続して結果、遂にそれらを解決することの可能な改良された構造からなる金属薄板折曲加工用工具を開発、完成することに成功したものであり、以下ではその構成を、図面に示すこの発明を代表する実施例と共に詳述していくこととする。
【０００７】
【発明の構成】
この発明の金属薄板折曲加工用工具は、基本的に２本のロッドと、折曲げ巾調整部兼用操作板、誘導用回転ローラ、および案内用回転ローラとから構成されていて、その構成の要旨は、凡そ次のような構成から成り立っている。
即ち、所定間隔を維持して平行させた２本のロッドと、両ロッドに直交状配置であって、それらロッドをガイドとしてスライド自在、且つ適宜位置固定可能構造とした折曲げ巾調整部兼用操作板と、一方のロッド先端に軸着される先端を丸めた逆円錐形の誘導用回転ローラと、他方のロッドの先端に軸着される円錐台形の案内用回転ローラとからなり、両ロッドの軸芯を含む平断面において、誘導用回転ローラは、その内側傾斜断面側線が、軸着すべきロッドの内側断面側線に略平行するよう、同回転軸をロッド軸芯に対して傾斜配置とされる一方、案内用回転ローラは、その内側傾斜断面側線が誘導用回転ローラのそれに略平行すると共に、その下面断面側線の延長線が誘導用回転ローラの先端に接するよう規制した配置で、且つ、折曲すべき金属薄板の材厚よりもやや大きめとなる間隔が維持される如くして同回転軸をロッド軸芯に対して傾斜配置とされ、誘導用回転ローラの先端と案内用回転ローラとの間に操作間隙部を形成してなるものとしたことを特徴とする金属薄板折曲加工用具である。
【０００８】
更に、２本のロッドと、先端を丸めた逆円錐形の誘導用回転ローラと、円錐台形の案内用回転ローラとの関係は、換言すれば、誘導用回転ローラおよび案内用回転ローラ共、その軸芯が両ロッドの軸芯を含む平断面内に収まり、且つ両ロッドの軸芯を含む平断面において、誘導用回転ローラは、その内側傾斜断面側線が、軸着すべきロッドの内側断面側線に略平行するよう、同回転軸をロッド軸芯に対して傾斜配置としてなるものにすると共に、案内用回転ローラは、同平断面において、その内側傾斜断面側線が、誘導用回転ローラの先の内側傾斜断面側線に略平行し、且つ折曲すべき金属薄板厚よりもやや大きくした操作間隙部を誘導用回転ローラとの間に形成し得るよう、同回転軸をロッド軸芯に対して傾斜配置としてなるものにしたことを特徴とするとして示すこともできる。
【０００９】
また、更に詳しくは、所定間隔を維持して平行させた２本のロッドと、両ロッドに直交状配置であって、それらロッドをガイドとしてスライド自在、且つ適宜位置固定可能構造とした折曲げ巾調整部兼用操作板と、一方のロッド先端に軸着される先端を丸めた逆円錐形の誘導用回転ローラと、他方のロッドの先端に軸着される円錐台形の案内用回転ローラとからなり、誘導用回転ローラおよび案内用回転ローラ共、その軸芯が両ロッドの軸芯を含む平断面内に収まり、且つ両ロッドの軸芯を含む平断面において、誘導用回転ローラは、その内側傾斜断面側線が、軸着すべきロッドの内側断面側線に揃うよう、同回転軸をロッド軸芯に対して傾斜配置としてなるものにすると共に、案内用回転ローラは、同平断面において、その内側傾斜断面側線が、誘導用回転ローラの先の内側傾斜断面側線に略平行し、且つ折曲すべき金属薄板厚よりもやや大きくした操作間隙部を誘導用回転ローラとの間に形成し得るよう、同回転軸をロッド軸芯に対して傾斜配置としてなるものにする一方、折曲げ巾調整部兼用操作板の下面には、平面配置で、誘導用回転ローラを軸着したロッドから両ロッドの軸芯を含む平断面に直交する方向に所定間隔を置いた位置を回転軸とした円盤状の一対の押し当て用回転ローラが、夫々の周縁の一部を、平面配置上で操作間隙部内にやや突出状か、操作間隙部に接する如く配置されてなるものとしたことを特徴とする金属薄板折曲加工用具となる。
【００１０】
２本のロッドは、誘導用回転ローラおよび案内用回転ローラの各サイズと、作業者が手で把持する上で都合の良い間隔とが配慮された適宜間隔、例えば８０ｍｍ前後の間隔で強固に平行した構造を実現するようにして形成されたものとしなければならず、夫々にはメートル法、尺貫法、ヤード法等による目盛りが別々に刻印されたものとする等して、後述する折曲げ巾調整部兼用操作板の固定位置、即ち、折曲加工すべき金属薄板の折り曲げ巾を決める位置が、他の定規等を用いなくとも作業者の希望する単位で簡単且つ正しく確認できるようにしたものとすると好都合のものとなる。
したがって、これらロッドは、実施例で示すような上端（即ち、各回転ローラを軸着する端部と反対側）相互を強固に連結、固定する構造の外、その中途を適宜間隔で粗めの梯子状となるような横材で連結、固定するものとしたり、Ｉ型断面の型鋼のような一体形成された部材を加工し、その両端部をロッド相当部とするようにしたもの等によって実現することができる。
【００１１】
誘導用回転ローラは、略逆円錐形（断面で逆三角形、即ち２本の傾斜断面側線と上辺断面側線とによって囲まれた形）であって、その先端は使用に際して金属薄板に傷を付けたり、作業者に危険性がないよう僅かに丸められた構造のものに形成されるようにすべきであり、金属薄板の所定幅に折曲加工されるべき側の裏面に当接、転動しながら、作業者の操作で所定幅部分を徐々に所定角度まで変形させる機能を果たす部分であり、折曲加工当初の段階でも金属薄板の裏面所定箇所まで潜り易くする作用を果たす必要があることから、略逆円錐形の駒のような形は、その先端側の角度が鋭角、例えば４５°以下、望ましくは組込み構造強度上で支障を来さない２０°〜３０°程度のものとなるような形状のものに形成されるべきである。
【００１２】
そして、この誘導用回転ローラは、次のような規制された姿勢で一方のロッド先端に軸着される。
即ち、平行配置されている２本のロッドの各軸芯を通る平断面において、逆円錐形断面で表れる誘導用回転ローラの、内側（後述する案内用回転ローラ側）に位置することとなる傾斜断面側線が、軸着されるロッドの内側断面側線の延長線に略平行する（但し、当該ロッド断面内に掛かる状態は除かれるが、延長線上に合致する状態は含まれる）ようにした配置に規制して形成されなければならず、したがって、その回転軸は、上端方向が軸着すべきロッドの軸芯から離れるような姿勢に傾斜させた取り付け構造で、当該ロッド先端に軸着されるようにしたものとしなければならない。
【００１３】
一方、案内用回転ローラは、比較的平たい円錐台形（断面で背丈の低い台形、即ち短い上辺断面側線とそれに平行で長い下辺断面側線、およびそれらの端部を繋ぎ、対称配置となって表れる一対の傾斜断面側線から囲まれる形）の円盤状部材からなり、折曲加工すべき金属薄板の折曲加工部に、その下辺断面側線と同傾斜断面側線とで形成される角部が当接、転動しながら往復動している間に、当接箇所が折曲げ支点となって、上記した誘導用回転ローラからの金属薄板裏面側からの力を受け、金属薄板上面で該案内用回転ローラが当接状となって描く軌跡に従った直線あるいは曲線よりも外側所定巾部分を、次第に所望する角度まで折曲加工できるように案内する機能を果たす部分である。
【００１４】
この案内用回転ローラは、その回転軸を、次のような規制された姿勢で、先の誘導用回転ローラを軸着したロッドと相対して配されている方のロッド先端に軸着されることとなる。
即ち、平行配置されている２本のロッドの各軸芯を通る平断面において、円錐台形断面で表れる案内用回転ローラの、内側（上記した誘導用回転ローラ側）に位置することとなる傾斜断面側線が、先の誘導用回転ローラ内側傾斜断面側線から金属薄板の材厚よりもやや大きくなる間隔、例えば０．６〜０．７ｍｍ程度の間隔だけ離反し、且つそれに略平行状となる姿勢が確保されるようにした配置で、しかも、その下辺断面側線の延長線が、上記誘導用回転ローラの先端（実際には丸められているが、丸める前の仮想先端）に略合致するよう規制された配置となり、この案内用回転ローラと上記誘導用回転ローラとの間に操作用間隙部が形成されるようにしなければならず、したがって、その回転軸は、上端方向が、誘導用回転ローラのそれと同方向に傾斜した姿勢となるような取り付け構造で、当該ロッド先端に軸着されるようにしたものに形成される。
【００１５】
折曲げ巾調整部兼用操作板は、平行する２本のロッドをガイドとしてその軸芯に沿う方向にスライド自在であって、且つそれら２本のロッドを支持部とし、進退自在に組み込んだ蝶捩子等公知の仮着手段で２本のロッドの適宜位置に固定自在となる板状部材であり、上記した案内用回転ローラの折曲げ支点（台形断面をした案内用回転ローラの下辺断面側線と同傾斜断面側線とで形成される角部）からの距離を固定することによって、金属薄板の折曲げ加工される側の巾を規制する機能を果たすと共に、作業者が手で把持する際の主要操作部分であって、次第に折曲げられていく金属薄板の端縁で手に怪我をしないよう保護する機能を果たす部分でもある。
【００１６】
この折曲げ巾調整部兼用操作板は、その下面に、平面配置で、誘導用回転ローラを軸着したロッドから両ロッドの軸芯を含む平断面に直交する方向に所定間隔を置いた位置を回転軸とした円盤状の一対の押し当て用回転ローラが、夫々の周縁の一部を、平面配置上で操作間隙部内にやや突出状か、操作間隙部に接するようにして配置、形成されたものとすれば、該押し当て用回転ローラで折り曲げられていく金属薄板の端縁裏面２か所に当接し、誘導用回転ローラの作用で折曲げ支点を境に次第に折り曲げられていく金属薄板の折り曲げられる側の端縁が、折曲げ工程中にも可能な限り直線状の端縁を維持し、折曲げ加工終了後にきれいな折曲げ片に加工された金属薄板を得ることができ、より実用価値のあるこの発明の加工用具を実現することができるものとなる。
以下、図面に示すこの発明を代表する実施例について説明を加えることにより、この発明の金属薄板折曲加工用具が包含する技術的思想の理解を深めることにする。
【００１７】
【実施例１】
図１の全体斜視図、図２の同正面図、図３の同左側面図、図４の同右側面図、および図５の同底面図からも理解されるとおり、間隔規制片３で所定間隔に平行させた２本のロッド１および４には、スライド片７１を介して折曲げ巾調整部兼用操作板７が、当該ロッド１および２に直交状に組み合わされ、スライド片７１側部に設けた蝶捩子７２の進退で、折曲げ巾調整部兼用操作板７をロッド１および２の所望する箇所に自在に固定することができるように形成されている。
なお、実施例では、この折曲げ巾調整部兼用操作板７に縁受け用回転ローラ７３，７３が、その一部を該折曲げ巾調整部兼用操作板７の底面からやや突出状であって、しかも、夫々の軸芯が両ロッド１および４の各軸芯を含む平断面に平行であって、且つその平断面から前後に適宜間隔を置いた位置となる配置で組み込まれた事例としているが、場合によって、これらは省略することもできる。
【００１８】
一方、折曲げ巾調整部兼用操作板７をスライド自在に組み合わせた各ロッド１および４の先端には、図２の正面図に示されているように、軸着部１１および４１が、夫々同一側であって先端を下方に向けた傾斜構造となるようにして形成され、ロッド１の軸着部１１には逆円錐形の誘導用回転ローラ２が、また、ロッド４の軸着部４１には比較的薄い円錐台形の案内用回転ローラ５が、以下のような配置構造となるようにして夫々軸着されている。
【００１９】
即ち、先ず、誘導用回転ローラ２および案内用回転ローラ５共に、その軸芯が、両ロッド１および４の各軸芯を含む平断面内に収まる、図３あるいは図４に示す左右各側面図に表されているような配置でなければならず、そして、誘導用回転ローラ２は、両ロッド１および４の各軸芯を含む平断面で表れるところの先端を丸めた略逆三角形断面の内側（両ロッド１および４の間。換言すれば案内用回転ローラに相対する側）の傾斜断面側線が、ロッド１の内側断面側線の延長線上に略合致する配置となるよう規制されてその回動軸２１を軸着部１１に軸着されたものとする。
したがって、ロッド１先端の軸着部１１は、予め上記した誘導用回転ローラ２の規制された配置構造が実現できるよう、所定の傾斜構造に形成される。
【００２０】
一方、これに相対して配される案内用回転ローラ５は、同じく両ロッド１および４の各軸芯を含む平断面において比較的薄い台形断面の内側（上記した誘導用回転ローラ２に相対する側）の傾斜断面側線が、上記誘導用回転ローラ２の内側傾斜断面側線に略平行し、且つ折曲すべき金属薄板Ｍ厚よりもやや大きい、約０．６ｍｍ程度の間隔が空くようにした配置となるようにして、他方のロッド４に形成した軸着部４１に軸着される。
このように、ロッド１に対する誘導用回転ローラ２、および該誘導用ローラ２に対する案内用回転ローラ５の夫々の関係が規制されて形成されるされるようにすると、自ずとロッド１の軸着部１１とロッド４の軸着部４１とは、共に同じ方向に傾斜した（但し、同一角度の傾斜構造になるとは限らない。）軸着部に形成されることになる。
【００２１】
その結果、誘導用回転ローラ２と案内用回転ローラ５との間には操作間隙部６が確保され、同所に折曲すべき金属薄板Ｍの所定巾部分Ｍ１側を挿入状とした上で折曲加工工程が進められることになる。
なお、この実施例でロッド１に対する誘導用回転ローラ２の配置構造は、両ロッド１および４の各軸芯を含む平断面で表れる略逆三角形断面の内側傾斜断面側線が、ロッド１の内側断面側線の延長線上に略合致する配置となるよう規制した事例としているが、既述の如く、誘導用回転ローラ２のサイズを大きくしたり、その軸着位置を内側にずらす等して、その略逆三角形断面の内側傾斜断面側線が、ロッド１の内側断面側線の延長線部分よりも内側となるようにした構造のものとすることも勿論可能である。
【００２２】
以上のとおりの構成各部で、基本的にこの発明の金属薄板折曲加工用具としても、金属薄板Ｍの所定箇所を所望する角度に折曲加工できるが、折り曲げられていく所定巾部分Ｍ１の折曲加工仕上がり具合をより良くするため、この実施例では、曲げ巾調整部兼用操作板７の下面に押し当て用回転ローラ８，８が並設された構造の事例としている。
即ち、この押し当て用回転ローラ８，８は、その平面配置で、誘導用回転ローラ２を軸着したロッド１から、両ロッド１及び４の軸芯を含む平断面に直交する方向に所定間隔を置いた位置にその回転軸を垂設状配置となるようにした円盤状のものであって、夫々の周縁の一部を、平面配置上で操作間隙部６内にやや突出状となる、図５の底面図が示しているような配置構造のものに形成する。
【００２３】
【作用】
以上のとおりの構成からなるこの発明の金属薄板折曲加工用具は、図６の使用状態における正面図中に二点鎖線表示されているような握り方で、作業者の手Ｈで操作するものであり、先ず、曲げ巾調整部兼用操作板７の蝶螺子７２を緩め、何れかのロッド１あるいは２に目盛り１２が刻まれているときにはそれを利用して曲げ巾調整部兼用操作板７をスライドさせ、該曲げ巾調整部兼用操作板７下面の位置が、操作用間隙部６下端からの距離で金属薄板Ｍの折曲すべき巾に相当する位置となったところで蝶螺子７２を締め付け、曲げ巾調整部兼用操作板７の位置を固定してしまう。
【００２４】
その後、図７の使用状態における正面図に示すように、その操作間隙部６から折曲すべき金属薄板Ｍを挿入（実施例では既に小巾折曲片と中巾折曲片とが折曲げ線に沿う方の端縁に形成されていることから、その端縁に直交する端縁側から金属薄板を操作間隙部６に挿入）し、折曲される側の端縁（実施例では折曲加工された中巾折曲片部分）を曲げ巾調整部兼用操作板７下面に当接するようにしてしまえば、その状態で案内用回転ローラ５の折曲げ支点５２が当接している箇所を折曲げ線とした折曲加工位置が自動的に決定されることになる。
【００２５】
そこで、金属薄板Ｍを動かないようにした上、案内用回転ローラ５の折曲げ支点５２を回動中心とし、各ロッド１，４の上端側が折り曲げたい方向（図中では右から左）に少しずつ回動するようにした動きがでるよう、手Ｈに加える力を加減しながら、工具全体の移動は、折曲げ線に沿う方向（図７では、紙面に直交する方向）に所定範囲、例えば２０〜３０ｃｍ程度の範囲に渡って数回往復動させるようにし、この往復動させた範囲の金属薄板Ｍ部分に僅かに折曲角度を付け、更に引き続いてその部分から再び所定範囲部分にも同じ操作で僅かな折曲角度を付けていき、この工程を順次金属薄板Ｍの折曲げ加工長さ全体に渡って繰り返し、先ず所期段階の僅かな折曲加工を施した上、再度最初からそれよりもやや強い折曲角度を全体に渡って、そして、更に強い角度、………にと何段階かに別けて実施し、最終的に所望する所定角度が実現されるようにしていく。
【００２６】
この工程では、所定範囲内で繰り返し実施される数回の往復動によって実現される折曲角度が、極端にきつい角度とならないよう注意して実施されるべきであり、折曲加工すべき全長が徐々に角度をきつくしていき、全長に渡る何回かの作業の繰り返しで所望する角度が実現されるようにするのが、この工具を使用した折曲加工作業として極めて重要である。
図７に示されている金属薄板Ｍは、その端縁から小巾の一段目の折曲加工、更にそれに続く中巾の折曲加工、および、これから実施されようとする大巾の折曲加工で、最終的に図６の状態にまで加工するようにした事例の、３段目の折曲加工初期段階を示している。
【００２７】
なお、図６に示された金属薄板Ｍの加工断面は、図６の状態で折曲加工を終えてしまうと、金属薄板Ｍの弾性に災いされて戻り現象を起こしてしまい、所望する直角状の折曲加工を実現し得ないため、更に図８に示すように、９０°よりやや多めの角度まで折曲げ加工を施して正しく直角に止どまるようにした折曲加工をする必要があり、従前のものではこの作業が実施できず、最終的に作業者が手や角棒で矯正作業を実施しなければならなかった。
また、図９に示す従来例からも理解されるとおり、従前までのものでは誘導用回転ローラ２′が円柱状のものであったことから、手で把持するという都合上で規制される両ロッド１′、４′の間隔内には、図６で示す金属薄板Ｍの加工断面の第１段、第２段の折曲加工を施したものに対する第３段目の折曲加工は、殆ど実施不能であった。
【００２８】
【効果】
以上のとおり、この発明の金属薄板折曲加工用具は、平行する２本のロッドの先端に軸着する誘導用回転ロッドと案内用回転ロッドとが規制された形状で規制された関係の配置具合に形成されたものとなっていることから、金属薄板Ｍを所望する角度に折曲加工する際に、初期の段階から下地上に金属薄板を平置き状としての加工が可能になり、第１０図のような従前のものによる折曲加工で必要とした角材Ｗ等の加工台を一切必要とせず、したがって、水平な場所に限らず傾斜面上、即ち、屋根下地上でも安全な加工が実施できることになり、それだけ作業効率が高められるという大きな特徴を有する上、所望する折曲角度、特に繁用される場面の多い直角状への折曲加工が、金属薄板の有する僅かな弾性変形に災いされることもなく、希望どおり正しく実施できるという秀れた効果が期待できることから、作業効率は一層高められるものとなる。
【００２９】
特に実施例のものでは、両ロッド１および４の各軸芯を含む平断面で表れる誘導用回転ローラ２の略逆三角形断面の内側（案内用回転ローラに相対する側）の傾斜断面側線が、ロッド１の内側断面側線の延長線上に略合致する配置となるよう規制されてその回動軸２１を軸着部１１に軸着したものとしていることから、両ロッド１および４の間の空間全体がそのまま金属薄板Ｍの変形加工端部収容空間に使え、図６中に示されているような多段折曲加工（パイプ折り加工）、箱折り加工も簡単になし得るものになると共に、操作用間隙部６に望む案内用回転ローラ５の折曲げ支点５２を回動中心とした折曲げ操作が、ロッド１の内側面に略合致するものとなって、作業者が目視したときの目安が付け易く、目で確認しながらの作業がやり易いことから、単に直線状の折り目線となる、例えば谷板、ドブ板、出隅入隅、水切り、笠木、唐草等の折曲加工についてはいうまでもなく、フードや換気扇等湾曲折り目線となる折曲加工については特に、従前までのものの操作性に比較して遥かに効率的になし得るという秀れた特徴を発揮できるものとなる。
【００３０】
叙上の如く、この発明の金属薄板折曲加工用具は、金属薄板の折曲加工のための作業効率が、従前までのものに比較して遥かに向上するだけではなく、作業内容についてもより正確に実施可能にすることを保証するものとなっており、時代と共に減少しつつある熟練した板金加工職人対策の一つとして、高い評価がなされるものと予想される。
【図面の簡単な説明】
図面は、この発明を代表する構成からなる金属薄板折曲加工用具の１実施例を示したものに過ぎない。
【図１】この発明の金属薄板折曲加工用具の全体斜視図である。
【図２】同正面図である。
【図３】同左側面図である。
【図４】同右側面図である。
【図５】同底面図である。
【図６】同使用状態における正面図である。
【図７】同他の使用状態における正面図である。
【図８】同更に他の使用状態における正面図である。
【図９】従前のものの使用状態における正面図である。
【図１０】同他の使用状態における正面図である。
【符号の説明】
１ロッド
１１同軸着部
１２同目盛り
２誘導用回転ローラ
２１同回転軸
３間隔規制片
４ロッド
４１同軸着部
５案内用回転ローラ
５１同回転軸
５２同折曲げ支点
６操作間隙部
７折曲げ巾調整部兼用操作板
７１同スライド片
７２同蝶螺子
７３同縁受け用回転ローラ
８押し当て用回転ローラ
Ｍ金属薄板
Ｍ１同折曲さける側の所定巾部分[0001]
OBJECT OF THE INVENTION
The present invention relates to a processing tool convenient for bending a metal thin plate, particularly a roofing metal thin plate, and enables a part of the metal thin plate to be easily bent to a desired angle with a predetermined width. An object of the present invention is to provide a metal sheet bending tool having a novel structure.
[0002]
[Prior art]
Recent roofing materials for residential buildings, etc. have become lighter, have better workability, are inexpensive, and have advanced coating technology to provide materials with outstanding durability and design effects. For these reasons, instead of traditional roof tiles and slate plates, thin metal plates are increasingly used nationwide.
The work that is indispensable for the work using this sheet metal as a roofing material is the folding process for the seam winding structure that serves as the joint and the draining structure for the overlapping part, or the bending process for the raised part for the roofing bar structure. Also, it is a work to bend the predetermined width part of the side edge of the unit metal thin plate to a desired angle, such as various bending processes for rain, etc. It takes a considerable year to work quickly and properly.
[0003]
However, as the number of skilled sheet metal processing craftsmen is gradually decreasing, the structure of sheet metal for roofing has been improved to be as good as factory processing as much as possible so that the ratio of on-site processing can be reduced to some extent. If it is only a typical roofing work, it can be done by simply joining the thin metal plates together with the processed joints, especially cutting and bending on site However, in an actual roofing site, for example, the ridges, valleys, kerabas, corners with corners, etc. enter the periphery of the place where the standard roofing work is completed. There is always a special structure, a flat part, or a half-sized part, so it is no longer just a standard hoisting work. Sheet metal that is loaded Te, and shape according to the situation of the field, cut to those of the size, the work to be bending process, it is common around and be sure to get to any roofing site.
[0004]
In the conventional work, apart from those that can be made into ready-made parts such as caps, kerabas, nasal cover, etc. To process a deformed member, first form it into a predetermined shape and size using a gold cutter, and further form a raised piece with a predetermined width like a draining member, with a crease at the bent part. The corner was placed under the crease, and the corner was positioned below the crease, and the corner was pushed and bent downwards by hand, and the corner was finally bent. The part needed to be struck with a striking bar from the outside toward the square material surface and formed into an accessory that was bent at a predetermined angle. In addition, such as construction roof surface Difficult to work in the slope, further was accompanied by several disadvantages, such as would bother to around emits a noise.
[0005]
In view of such a situation, the applicant of the present application has already used a metal sheet bending tool as shown in the front view in the use state of FIG. 9 and the front view in the use state at the stage of bending processing in FIG. Developed and put into practical use, and has been widely adopted by many sheet metal processors so far, and has gained high praise as a bending tool that is extremely efficient and does not require special skills compared to conventional bending work. It was.
This already developed metal sheet bending tool is, as can be seen from the figure, a guiding rotating roller 2 'and a guiding rotating roller 4 which are pivotally attached to the tips of two parallel rods 1' and 3 '. 'Is formed of a disk-shaped member, and between each of the rotating rollers 2' and 4 ', it is substantially parallel to the inner surface of the rod 1' for axially mounting the guiding rotating roller 2 '. Each rotating roller 2 ', 4' individual rotating shaft rotates each rotation so that an operating gap 5 'is formed and the bottom surfaces of each rotating roller 2', 4 'are aligned with the operating gap 5' in between. The disc-shaped members constituting the rollers 2 'and 4' are arranged so as to be regulated at positions corresponding to the thickness and diameter.
[0006]
As a result, the rotating rollers 2 'and 4' made of disk-like members are arranged orthogonally to the rods 1 'and 3' that are pivotally mounted on the rotating rollers 2 'and 4' so that the bottom surfaces thereof are aligned on the same plane, and as much as possible for guiding rotation. Even if the diameter of the roller 2 'is made smaller, there is a limit in terms of the structure. Therefore, at the stage where the thin metal plate M starts to be folded, the guiding rotary roller 2' is placed on the lower surface of the thin metal plate M. If it tries to insert in the side predetermined position, as shown in FIG. 10, it has the problem that it can work only after making a space below the thin metal plate M via a suitable square member W, and the bent piece In theory, M1 has a maximum of 90 °, and practically, the metal thin plate M suffers from the elasticity, and the bending angle of 90 ° cannot be realized.
In this invention, in order to deal with the problems of these conventional ones, we have developed metal thin plate bending tools with an improved structure that can finally solve them as a result of continuous development and research. In the following, the configuration will be described in detail together with an embodiment representative of the present invention shown in the drawings.
[0007]
[Structure of the invention]
The metal sheet bending tool of the present invention is basically composed of two rods, a bending width adjusting section combined operation plate, a guiding rotating roller, and a guiding rotating roller. The gist consists of the following composition.
That is, two rods that are parallel to each other while maintaining a predetermined interval, and a bending width adjusting portion combined operation that is arranged orthogonally to both rods and that can be slidable with the rods as a guide and can be fixed in place as appropriate. A plate, an inverted conical guide rotary roller with a rounded tip that is pivotally attached to the tip of one rod, and a frustoconical guide rotary roller that is pivotally attached to the tip of the other rod. In the plane cross section including the shaft core, the rotation roller for guidance is arranged to be inclined with respect to the rod axis so that the inner inclined cross section side line thereof is substantially parallel to the inner cross section side line of the rod to be axially attached. On the other hand, the guide rotation roller has an arrangement in which the inner inclined cross-section side line is substantially parallel to that of the guide rotation roller and the extension line of the lower surface cross-section side line is in contact with the tip of the guide rotation roller, and Fold The rotating shaft is inclined with respect to the rod axis so as to maintain an interval slightly larger than the thickness of the metal sheet, and between the leading end of the guiding rotating roller and the guiding rotating roller. A metal sheet bending tool characterized by forming an operation gap.
[0008]
Furthermore, the relationship between the two rods, the inverted conical guide rotating roller with a rounded tip, and the frustoconical guiding rotating roller is, in other words, the guiding rotating roller and the guiding rotating roller. In the plane cross section in which the shaft core is included in the plane cross section including the shaft cores of both rods and the axis core of both rods, the inner rotating cross section side line of the guide rotation roller is the inner cross section side line of the rod to be axially mounted. The rotation shaft is inclined with respect to the rod axis so as to be substantially parallel to the rod axis, and the guide rotation roller has an inner inclined cross-section side line on the tip of the guide rotation roller. The rotation axis is inclined with respect to the rod axis so that an operation gap that is substantially parallel to the inner inclined cross-section side line and slightly larger than the thickness of the metal sheet to be bent can be formed between the guide rotation roller and the rotation axis. What you have to do as an arrangement It may be shown as characterized.
[0009]
In more detail, two rods that are parallel to each other while maintaining a predetermined interval, and a folding width that is arranged orthogonally to both rods and that is slidable with these rods as guides and that can be appropriately positioned. It consists of an adjustment unit combined operation plate, an inverted conical guide rotation roller that is rounded at the tip of one rod, and a frustoconical guide rotation roller that is pivoted at the tip of the other rod. The guide rotation roller and the guide rotation roller both have their axis within the plane cross section including the axis of both rods, and the guide rotation roller is inclined inwardly in the plane cross section including the axis of both rods. The rotation axis is inclined with respect to the rod axis so that the cross-section side line is aligned with the inner cross-section side line of the rod to be axially attached. Cross section side However, the rotation of the guide rotation roller is substantially parallel to the inner inclined cross-section side line of the leading end of the guide rotation roller so that an operation gap portion slightly larger than the thickness of the metal sheet to be bent can be formed between the guide rotation roller and the guide rotation roller. While the shaft is inclined with respect to the rod axis, on the lower surface of the bending width adjusting unit / operating plate, the axis of both rods is arranged in a flat arrangement from the rod on which the guide rotation roller is attached. A pair of disk-shaped rotary rollers for pressing with a predetermined interval in a direction perpendicular to the plane including the plane, a part of the periphery of each of the rollers is slightly protruding into the operation gap on the plane arrangement Alternatively, it is a metal sheet bending tool characterized by being arranged so as to be in contact with the operation gap.
[0010]
The two rods are firmly parallel at an appropriate interval in consideration of the sizes of the guide rotation roller and the guide rotation roller and the interval convenient for the operator to grasp by hand, for example, an interval of about 80 mm. The fold width adjusting section to be described later is assumed to be formed so as to realize the above-mentioned structure, and each of them is separately engraved with a metric method, a shank method, a yard method, etc. Assume that the fixed position of the dual-purpose operation plate, that is, the position for determining the folding width of the thin metal plate to be bent can be easily and correctly confirmed in the unit desired by the operator without using other rulers. It will be convenient.
Therefore, these rods have a structure in which the upper ends (that is, the side opposite to the end portion on which each rotating roller is attached) are firmly connected and fixed as shown in the embodiment, and the middle of the rod is roughened at appropriate intervals. Realized by connecting or fixing with a cross-shaped ladder like a ladder, or by processing an integrally formed member such as a steel with an I-shaped cross section so that both ends become rod equivalent parts can do.
[0011]
The guide rotation roller has a substantially inverted conical shape (inverted triangle in cross section, that is, a shape surrounded by two inclined cross section side lines and an upper cross section side line), and the tip thereof scratches the thin metal plate in use. It should be formed in a slightly rounded structure so that there is no danger to the operator, and it contacts and rolls on the back side of the metal sheet to be bent to a predetermined width. However, it is a part that fulfills the function of gradually deforming the predetermined width part to a predetermined angle by the operator's operation, and it is necessary to fulfill the function of facilitating diving to the predetermined position on the back surface of the metal thin plate even at the initial stage of bending. The shape of the substantially inverted cone-shaped piece is such that the angle on the tip side is an acute angle, for example, 45 ° or less, and preferably 20 ° to 30 ° which does not hinder the built-in structure strength. Should be formed into one.
[0012]
The guide rotation roller is pivotally attached to the tip of one of the rods in the following regulated posture.
In other words, in the plane cross section passing through the axes of the two rods arranged in parallel, the inclination is located on the inner side (the guide rotation roller side described later) of the guide rotation roller represented by the inverted conical section. The arrangement is such that the cross-section side line is substantially parallel to the extension line of the inner cross-section side line of the rod to be axially attached (however, the state that falls within the cross-section of the rod is excluded, but the condition that matches the extension line is included) Therefore, the rotation axis of the rotating shaft is attached to the tip of the rod with an attachment structure inclined so that the upper end direction is away from the axis of the rod to be attached. Must be.
[0013]
On the other hand, the guide rotation roller has a relatively flat truncated cone shape (a trapezoid having a low height in cross section, that is, a pair of short upper side cross-sectional side lines connected to a long lower cross-sectional side line parallel to them, and ends thereof and appearing symmetrically. The corners formed by the lower cross-sectional side line and the inclined cross-sectional side line abut on the bent portion of the thin metal plate to be bent, While reciprocating while rolling, the contact portion becomes a bending fulcrum, receives the force from the back side of the thin metal plate from the guiding rotary roller, and the guide rotary roller on the upper surface of the thin metal plate Is a portion that performs a function of guiding a predetermined width portion outside the straight line or curve according to the locus drawn in a contact shape so as to bend gradually to a desired angle.
[0014]
The guide rotating roller is pivotally mounted on the tip of the rod disposed with the rotating shaft facing the rod on which the previous guiding rotating roller is pivoted in a regulated posture as follows. It will be.
In other words, in a plane cross section passing through the axes of the two rods arranged in parallel, an inclined cross section that is located on the inner side (the guide rotary roller side described above) of the guide rotary roller represented by the truncated cone section. A posture in which the side line is separated from the previous guide rotation roller inner inclined cross-section side line by a distance slightly larger than the thickness of the metal thin plate, for example, about 0.6 to 0.7 mm, and substantially parallel to it. And the extension of the lower cross-section side line is regulated so as to substantially match the leading end of the guiding rotating roller (actually rounded but virtual tip before rounding). Therefore, an operation gap must be formed between the guide rotation roller and the guide rotation roller. Therefore, the rotation shaft has an upper end direction in the guide rotation roller. Noso And a mounting structure such as an inclined posture in the same direction, are formed on those to be pivotally attached to the rod end.
[0015]
The folding width adjusting part combined operation plate is slidable in the direction along its axis with two parallel rods as a guide, and the two rods are used as support parts, and the thumbscrews are built in freely It is a plate-like member that can be fixed to an appropriate position of the two rods by known temporary attachment means such as a child, and the bending fulcrum of the above-described guiding rotating roller (the lower side cross-section side line of the guiding rotating roller having a trapezoidal section) By fixing the distance from the corners formed by the inclined cross-section side line), the width of the side of the metal sheet that is to be bent is controlled, and at the same time the operator holds it by hand It is an operation part that also functions to protect the hand from being injured at the edge of the metal sheet that is gradually bent.
[0016]
The bending width adjusting section combined operation plate has a planar arrangement on the lower surface thereof at a predetermined interval in a direction perpendicular to the plane cross section including the axial center of both rods from the rod on which the guide rotation roller is pivotally attached. A pair of disk-shaped rotating rollers for pressing as rotating shafts are arranged and formed so that a part of each peripheral edge protrudes slightly in the operation gap portion on a planar arrangement or is in contact with the operation gap portion. If this is the case, the metal thin plate that is bent by the pressing rotary roller abuts against the two back edges of the metal thin plate and is gradually bent at the bending fulcrum by the action of the guiding rotary roller. The edge on the side to be folded maintains a straight edge as much as possible even during the folding process, and a metal sheet processed into a beautiful folded piece after the folding process can be obtained. Realize the processing tool of this invention with The things that can and.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment that represents the present invention shown in the drawings will be described to deepen the understanding of the technical idea included in the metal sheet bending tool of the present invention.
[0017]
[Example 1]
As can be understood from the overall perspective view of FIG. 1, the front view of FIG. 2, the left side view of FIG. 3, the right side view of FIG. 4, and the bottom view of FIG. The two rods 1 and 4 that are parallel to each other are provided with a bending width adjusting portion / operating plate 7 through a slide piece 71 in an orthogonal manner to the rods 1 and 2 and provided on the side of the slide piece 71. In addition, the bending width adjusting portion / operating plate 7 can be freely fixed to a desired portion of the rods 1 and 2 by the advancement / retraction of the butterfly screw 72.
In the embodiment, the edge receiving rotating rollers 73 and 73 are slightly protruding from the bottom surface of the bending width adjusting portion / operating plate 7 on the bending width adjusting portion / operating plate 7. In addition, the shaft cores are incorporated in an arrangement in which the respective shaft cores are parallel to the flat cross section including the shaft cores of both the rods 1 and 4 and are spaced at appropriate intervals from the flat cross section. However, in some cases, these can be omitted.
[0018]
On the other hand, as shown in the front view of FIG. 2, shaft mounting portions 11 and 41 are the same at the tips of the rods 1 and 4 slidably combined with the bending width adjusting portion combined operation plate 7. It is formed so as to have an inclined structure with the tip directed downward, and an inverted conical guide rotation roller 2 is provided on the shaft attachment portion 11 of the rod 1, and the shaft attachment portion 41 of the rod 4 is provided on the shaft attachment portion 41. A relatively thin frustoconical guide rotation roller 5 is pivotally mounted in the following arrangement structure.
[0019]
That is, first, both the guide rotation roller 2 and the guide rotation roller 5 have their shaft centers within a plane section including the shaft cores of both rods 1 and 4, and the left and right side views shown in FIG. 3 or FIG. And the guide rotating roller 2 is arranged on the inner side of a substantially inverted triangular cross-section with rounded tips at the flat cross-sections including the axial centers of the rods 1 and 4. The tilted cross-section side line (between both rods 1 and 4, in other words, the side facing the guide rotation roller) is regulated so as to be substantially aligned with the extension line of the inner cross-section side line of the rod 1 and rotated. It is assumed that the shaft 21 is mounted on the shaft mounting portion 11.
Therefore, the shaft mounting portion 11 at the tip of the rod 1 is formed in a predetermined inclined structure so that the above-described restricted arrangement structure of the guide rotation roller 2 can be realized.
[0020]
On the other hand, the guide rotating roller 5 disposed in opposition to this is the inner side of a relatively thin trapezoidal section in the plane section including the shaft cores of both rods 1 and 4 (relative to the guiding rotating roller 2 described above). The side line of the inclined section is substantially parallel to the inner inclined section side line of the guide rotation roller 2 and is slightly larger than the thickness of the thin metal plate M to be bent, with an interval of about 0.6 mm. It is axially attached to the axially attaching part 41 formed in the other rod 4 so as to be arranged.
As described above, when the relation between the guiding rotating roller 2 with respect to the rod 1 and the guiding rotating roller 5 with respect to the guiding roller 2 is regulated and formed, the shaft attaching portion 11 of the rod 1 is naturally formed. And the shaft mounting portion 41 of the rod 4 are both formed in a shaft mounting portion that is tilted in the same direction (however, the tilt structure is not necessarily the same angle).
[0021]
As a result, an operation gap portion 6 is secured between the guide rotation roller 2 and the guide rotation roller 5, and the predetermined width portion M1 side of the thin metal plate M to be bent at the same position is inserted. The bending process will proceed.
In this embodiment, the arrangement structure of the guide rotation roller 2 with respect to the rod 1 is such that the inner inclined cross-section side line of the substantially inverted triangular cross section represented by a flat cross section including the shaft cores of both rods 1 and 4 is the inner cross section of the rod 1. Although the example is such that the arrangement is substantially matched with the extended line of the side line, as described above, the size of the guide rotation roller 2 is increased, or its axial attachment position is shifted inward. Of course, it is possible to have a structure in which the inner inclined cross-section side line of the inverted triangular cross-section is inside the extended line portion of the inner cross-section side line of the rod 1.
[0022]
With the components as described above, the metal sheet bending tool of the present invention can basically be bent at a desired angle at a predetermined position of the metal sheet M, but the predetermined width portion M1 that is bent is folded. In this embodiment, in order to improve the finish of the bending process, an example of a structure in which the pressing rotary rollers 8 and 8 are arranged in parallel on the lower surface of the bending width adjusting unit / operating plate 7 is used.
In other words, the pressing rotary rollers 8 and 8 are arranged at a predetermined interval in the plane arrangement from the rod 1 on which the guide rotary roller 2 is pivotally attached to a direction perpendicular to the plane cross section including the shaft cores of the rods 1 and 4. Is a disk-like configuration in which the rotation axis is vertically arranged at the position where the position is placed, and a part of each peripheral edge is slightly protruding into the operation gap portion 6 in a planar arrangement. It is formed in an arrangement structure as shown in the bottom view of FIG.
[0023]
[Operation]
The metal sheet bending tool of the present invention configured as described above is operated by the operator's hand H in the manner of gripping as indicated by a two-dot chain line in the front view in the use state of FIG. First, loosen the butterfly screw 72 of the bending width adjusting portion / operating plate 7 and when any of the rods 1 or 2 is engraved with a scale 12, the bending width adjusting portion / operating plate 7 is used. When the position of the lower surface of the operation plate 7 serving as the bending width adjusting portion 7 is slid and the position corresponding to the width of the thin metal plate M to be bent at a distance from the lower end of the operation gap 6, the butterfly screw 72 is tightened. The position of the bending width adjusting unit / operating plate 7 is fixed.
[0024]
After that, as shown in the front view in the use state of FIG. 7, the metal thin plate M to be bent is inserted from the operation gap 6 (in the embodiment, the small and medium width bent pieces are already bent). Since it is formed at the edge along the line, the metal thin plate is inserted into the operation gap portion 6 from the edge side orthogonal to the edge, and the edge on the side to be bent (bending in the embodiment) If the machined middle width folded piece portion) is brought into contact with the lower surface of the bending width adjusting portion / operating plate 7, the portion where the bending fulcrum 52 of the guide rotation roller 5 is in contact with the bent width adjusting portion 5 is folded. The bending position as the bending line is automatically determined.
[0025]
Therefore, the metal thin plate M is prevented from moving, and the bending fulcrum 52 of the guide rotation roller 5 is set as the rotation center, and the upper ends of the rods 1 and 4 are slightly bent in the direction in which they are to be bent (from right to left in the figure). The movement of the entire tool is adjusted within a predetermined range in the direction along the fold line (the direction perpendicular to the paper surface in FIG. 7), for example, while adjusting the force applied to the hand H so that the movement is made to rotate one by one. It is made to reciprocate several times over a range of about 20 to 30 cm, a slight bending angle is given to the metal sheet M portion in the reciprocating range, and the same is applied to the predetermined range portion again from that portion. A slight bending angle is set by the operation, and this process is sequentially repeated over the entire bending length of the thin metal sheet M. First, a slight bending process is performed at the initial stage and then again from the beginning. A slightly stronger bending angle than the whole And a stronger angle, performed divided into several steps and the ......... finally desired predetermined angle is gradually to be realized.
[0026]
In this step, the bending angle realized by several reciprocations that are repeatedly performed within a predetermined range should be performed with care so that the bending angle is not an extremely tight angle. It is extremely important as a bending work using this tool that the angle is gradually tightened and a desired angle is realized by repeating the work several times over the entire length.
The metal thin plate M shown in FIG. 7 has a first step of bending from the edge thereof, followed by bending of a medium width, and subsequent bending of a large width to be performed. Thus, a third bending initial stage of the case where the machining is finally performed to the state of FIG. 6 is shown.
[0027]
The processed cross section of the thin metal plate M shown in FIG. 6 causes a return phenomenon due to the elasticity of the thin metal plate M when the bending process is finished in the state of FIG. Therefore, as shown in Fig. 8, it is necessary to perform bending to a slightly larger angle than 90 ° so that it stops at a right angle. However, this work could not be carried out with the previous one, and finally the operator had to carry out the correction work with hands and square bars.
Further, as understood from the conventional example shown in FIG. 9, since the guide rotating roller 2 'has a cylindrical shape in the conventional one, both rods are restricted for the sake of gripping by hand. Within the interval of 1 'and 4', the third-stage bending of the processed thin metal sheet M shown in FIG. It was impossible.
[0028]
[Effect]
As described above, the metal thin plate bending tool according to the present invention has an arrangement condition in which the guiding rotating rod and the guiding rotating rod that are pivotally attached to the tips of two parallel rods are regulated in a regulated shape. Therefore, when the metal thin plate M is bent to a desired angle, the metal thin plate can be processed flatly on the base from the initial stage. As shown in the figure, it does not require any processing base such as square bar W required for bending with conventional ones, so safe processing is performed not only on horizontal places but also on inclined surfaces, that is, on the roof base. In addition to having a great feature that the work efficiency can be increased, the desired bending angle, especially the bending process to the right angle where there are many scenes frequently used, suffers from the slight elastic deformation of the metal sheet. Without being, rare Because it can expect Xiu the effect as expected can be correctly carried out, and that the working efficiency is further enhanced.
[0029]
Particularly in the embodiment, the inclined cross-section side line on the inner side of the substantially inverted triangular cross section of the guiding rotary roller 2 represented by a flat cross section including the axis of each of the rods 1 and 4 (the side opposite to the guiding rotary roller) is The entire space between the rods 1 and 4 is restricted by being arranged so as to be substantially coincident with the extended line of the inner cross-section side line of the rod 1 and the pivot shaft 21 is pivotally attached to the pivot portion 11. Can be used as it is in the deformed end accommodating space of the thin metal plate M, and multi-stage bending (pipe folding) and box folding as shown in FIG. The bending operation with the bending fulcrum 52 of the guide rotation roller 5 desired for the gap 6 as the center of rotation substantially matches the inner surface of the rod 1, and a guideline for the operator's visual observation is attached. Easy and easy to work while visually checking Therefore, it becomes a straight crease line, for example, it is a curved crease line such as a hood or a ventilation fan, not to mention bending processing of valley plates, dove boards, corners in corners, draining, coping, arabesque, etc. In particular, the bending process can exhibit the excellent feature that it can be performed much more efficiently than the operability of the conventional one.
[0030]
As described above, the metal sheet bending tool of the present invention not only greatly improves the work efficiency for bending metal sheets, but also improves the work contents. It is guaranteed to be able to be implemented accurately, and is expected to be highly evaluated as one of the measures for skilled sheet metal processing craftsmen, which is decreasing with the times.
[Brief description of the drawings]
The drawings show only one embodiment of a metal sheet bending tool having a configuration representative of the present invention.
FIG. 1 is an overall perspective view of a metal sheet bending tool of the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is a left side view of the same.
FIG. 4 is a right side view of the same.
FIG. 5 is a bottom view of the same.
FIG. 6 is a front view in the same use state.
FIG. 7 is a front view of the other use state.
FIG. 8 is a front view of still another usage state.
FIG. 9 is a front view of a conventional one in use.
FIG. 10 is a front view of the other use state.
[Explanation of symbols]
1 Rod
11 Coaxial landing part
12 Same scale
2 Rotating roller for guidance
21 Same rotating shaft
3 Spacing restriction piece
4 Rod
41 Coaxial landing part
5 Rotating roller for guidance
51 Same rotating shaft
52 Folding fulcrum
6 Operation gap
7 Bending width adjustment part combined operation panel
71 Same slide piece
72 The same butterfly screw
73 Rotating roller for receiving the same edge
8 Rotating roller for pressing
M metal sheet
M1 Predetermined width on the side where bending

Claims

Two rods that are parallel to each other while maintaining a predetermined interval, and a bending width adjusting portion combined operation plate that is arranged orthogonally to both rods and that is slidable with these rods as a guide and that can be appropriately fixed in position. An inverted conical guide rotary roller with a rounded tip that is pivotally attached to the tip of one rod, and a frustoconical guide rotary roller that is pivotally attached to the tip of the other rod. In the plane section including the guide rotation roller, the rotation axis is inclined with respect to the rod axis so that the inner inclined section side line is substantially parallel to the inner section side line of the rod to be axially attached. The guide rotation roller has an arrangement in which the inner inclined cross section side line is substantially parallel to that of the guide rotation roller, and the extension line of the lower cross section side line is in contact with the tip of the guide rotation roller, and is bent. Money to do The rotation shaft is inclined with respect to the rod axis so that a space slightly larger than the thickness of the thin plate is maintained, and an operation gap is formed between the leading end of the guide rotation roller and the guide rotation roller. A metal sheet bending tool characterized by comprising a part.

Two rods that are parallel to each other while maintaining a predetermined interval, and a bending width adjusting unit combined operation plate that is arranged orthogonally to both rods and that is slidable with these rods as a guide and that can be appropriately fixed in position. An inverted conical guide rotation roller having a rounded tip that is pivotally attached to the tip of one rod, and a frustoconical guide rotary roller that is pivotally attached to the tip of the other rod. In both of the guide rotating rollers, the shaft center is within the plane cross section including the shaft cores of both rods, and in the plane cross section including the shaft cores of both rods, While the rotation shaft is inclined with respect to the rod axis so that it is substantially parallel to the inner cross-section side line of the rod to be guided, the guide rotation roller has an inner inclined cross-section side line in the same flat cross-section. Rotation for guidance The operation gap portion is arranged so as to be substantially parallel to that of the roller and to be such that the extension line of the lower cross-sectional side line is in contact with the leading end of the guide rotating roller and is slightly larger than the thickness of the thin metal plate to be bent. A metal sheet bending tool characterized in that the rotating shaft is formed in an inclined arrangement with respect to the rod axis so that it can be formed between the rotating guide rollers.

Two rods that are parallel to each other while maintaining a predetermined interval, and a bending width adjusting portion combined operation plate that is arranged orthogonally to both rods and that is slidable with these rods as a guide and that can be appropriately fixed in position. An inverted conical guide rotation roller having a rounded tip that is pivotally attached to the tip of one rod, and a frustoconical guide rotary roller that is pivotally attached to the tip of the other rod. In both of the guide rotation rollers, the shaft center is within the plane cross section including the shaft centers of both rods, and the guide rotation roller has the inner inclined cross section side line of the shaft rotation. The rotation shaft is inclined with respect to the rod axis so that it is substantially parallel to the inner cross-section side line of the rod, and the guide rotation roller has an inner inclined cross-section side line on the same flat cross-section. Guide times The rotating shaft is arranged on the rod axis so that an operation gap portion which is substantially parallel to the inner inclined cross section side line at the tip of the roller and is slightly larger than the thickness of the thin metal plate to be bent can be formed between the rotating shaft for guidance. On the other hand, the lower surface of the bending width adjusting unit combined operation panel is flat and orthogonal to the flat section including the shaft core of both rods from the rod on which the guide rotation roller is pivotally mounted. A pair of disk-shaped pressing rotary rollers having a rotation axis at a predetermined interval in the direction of rotation as a part of each peripheral edge protrudes slightly into the operation gap portion in a planar arrangement, or the operation gap portion A metal sheet bending tool characterized by being arranged so as to be in contact with the metal sheet.