JP3819203B2

JP3819203B2 - Pipe body manufacturing apparatus and pipe body manufacturing method

Info

Publication number: JP3819203B2
Application number: JP2000027844A
Authority: JP
Inventors: 崇史近藤; 圭二石野
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2000-02-04
Filing date: 2000-02-04
Publication date: 2006-09-06
Anticipated expiration: 2020-02-04
Also published as: JP2001212619A

Description

【０００１】
【発明の属する技術分野】
本発明は、金属プレートを曲げ加工することによってパイプ体の製造を行う技術分野に属するものである。
【０００２】
【従来の技術】
従来から、金属プレートを曲げ加工することによってパイプ体、例えば、角柱パイプ体の製造を行う技術として、特開平１１−２９０９４０号公報に記載のものが知られている。
【０００３】
この特開平１１−２９０９４０号公報に開示のものは、矩形状の金属プレートを素材として、プレス加工によって角柱パイプ体の成形を行っている。
【０００４】
この角柱パイプ体の加工方法は、その金属プレートの幅方向両端部（一対の辺部）を長さ方向（その辺の延びる方向）に沿ってかつ同方向に直角に折り曲げて、互いに対向するフランジ部（合わせ目構成壁部）と互いに対向するフランジ部を連結する底板部とを有する一次成形品を形成する第１曲げ工程と、その一次成形品の底板部に長さ方向に沿って所定幅の凹曲面を形成すると共に、この凹曲面の両端を内側に略直角に折り曲げて互いに対向する一対の側壁部を有しかつ断面が略Ｕ字状の二次成形品を形成する第２曲げ工程と、その二次成形品の一対の側壁部を互いに内側に向けて押圧して一対のフランジ部（合わせ目構成壁部）の端面同士（合わせ目）を突き合わせるリストライク工程とからなっている。
【０００５】
この角柱パイプ体の加工方法によれば、その二次成形品を形成する際にその二次成形品の底板部に形成された凹曲面が一対の側壁部を互いに内側に向けて押圧することによって生じるスプリングバック力を抑制する機能を果たすため、フランジ部の端面同士を溶接することなくフランジ部の端面同士が密着した断面角形の角柱パイプ体をプレス成形のみによって製造できる。
【０００６】
【発明が解決しようとする課題】
しかしながら、この従来の角柱パイプ体の加工方法では、その二次成形品を形成する際にその二次成形品の底板部に形成された凹曲面が一対の側壁部を互いに内側に向けて押圧することによって生じるスプリングバック力を抑制する機能を果たすとはいっても、一対の側壁部には外側に向かって開こうとするスプリングバック力が残存しており、量産時にフランジ部（合わせ目構成壁部）の端面同士（合わせ目）が密着した角柱パイプ体をばらつきなく安定して製造することは難しい。
【０００７】
すなわち、この加工方法によって製造された角柱パイプ体のフランジ部の端面同士が密着しているか否かの検査を行ってみると、端面同士が密着しているものもあるが、一対の側壁部に存在するスプリングバック力により合わせ目には隙間が開いているものもかなりある。
【０００８】
本発明は、上記の事情に鑑みて為されたもので、その目的とするところは、量産時にプレス成形によって合わせ目が密着したパイプ体をばらつきなく安定して製造することのできるパイプ体の製造装置及びパイプ体の製造方法を提供することにある。
【０００９】
【課題を解決するための手段】
請求項１に記載のパイプ体の製造装置は、矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、該加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態を維持する静止摩擦力を有する材料からなりかつ前記合わせ目構成壁部の屈曲部に接触して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する摩擦接触部材が設けられていることを特徴とする。
【００１０】
請求項２に記載のパイプ体の製造装置は、矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、前記加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態が維持されるように、前記合わせ目構成壁部の屈曲部に係合して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する係合突起が設けられていることを特徴とする。
【００１１】
請求項３に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体の閉断面の形状が矩形であり、前記パイプ体の各構成壁部は前記矩形の各辺を構成しかつ前記中間成形品の一構成壁部に対応する底壁部と前記中間成形品の一対の隣接構成壁部に対応する一対の側壁部と前記中間成形品の合わせ目構成壁部に対応する上壁部とからなることを特徴とする。
【００１２】
請求項４に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記加工装置本体は前記固定型に対向して可動される可動型を有し、前記可動型には可動プレートと該可動プレートに設けられて前記一対の加圧パンチ部材を互いに接近させる方向に可動させる駆動部材とが設けられていることを特徴とする。
【００１３】
請求項５に記載のパイプ体の製造装置は、請求項４に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材は前記一構成壁部が前記固定プレートに当接した状態で加圧力を維持しつつ可動が停止されることを特徴とする。
【００１４】
請求項６に記載のパイプ体の製造装置は、請求項４に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材は係合テーパ部を有して互いに離間する方向に付勢され、前記駆動部材は前記係合テーパ部と係合する係合テーパ部を有し、前記一対の加圧パンチ部材はその係合テーパ部と前記駆動部材のテーパ部とによって互いに接近する方向に可動されることを特徴とする。
【００１５】
請求項７に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記合わせ目が前記合わせ目構成壁部の中央に位置していることを特徴とする。
【００１７】
請求項８に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体はその閉断面の形状が三角形又は五角形又は六角形であることを特徴とする。
【００１８】
請求項９に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体の加工は、前記金属プレートを折り曲げたときの延び量を見越して行われることを特徴とする。
【００１９】
請求項１０に記載のパイプ体の製造装置は、請求項１又は請求項２に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材を離反・接近させるために上下動される加圧パンチ部材が設けられていることを特徴とする。
請求項１１に記載のパイプ体の製造方法は、矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、該加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態を維持する静止摩擦力を有する材料からなりかつ前記合わせ目構成壁部の屈曲部に接触して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する摩擦接触部材が設けられていることを特徴とするパイプ体の製造装置を用いたところにある。
請求項１２に記載のパイプ体の製造方法は、矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、前記加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態が維持されるように、前記合わせ目構成壁部の屈曲部に係合して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する係合突起が設けられていることを特徴とするパイプ体の製造装置を用いたところにある。
請求項１３に記載のパイプ体の製造方法は、請求項１１又は請求項１２に記載のパイプ体の製造装方法において、前記パイプ体の閉断面の形状が矩形であり、前記パイプ体の各構成壁部は前記矩形の各辺を構成しかつ前記中間成形品の一構成壁部に対応する底壁部と前記中間成形品の一対の隣接構成壁部に対応する一対の側壁部と前記中間成形品の合わせ目構成壁部に対応する上壁部とからなることを特徴とする。
請求項１４に記載のパイプ体の製造方法は、請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記加工装置本体は前記固定型に対向して可動される可動型を有し、前記可動型には可動プレートと該可動プレートに設けられて前記一対の加圧パンチ部材を互いに接近させる方向に可動させる駆動部材とが設けられていることを特徴とするパイプ体の製造装置を用いたところにある。
請求項１５に記載のパイプ体の製造方法は、請求項１４に記載のパイプ体の製造方法において、前記一対の加圧パンチ部材は前記一構成壁部が前記固定プレートに当接した状態で加圧力を維持しつつ可動が停止されることを特徴とするパイプ体の製造装置を用いたところにある。
請求項１６に記載のパイプ体の製造方法は、請求項１４に記載のパイプ体の製造方法において、前記一対の加圧パンチ部材は係合テーパ部を有して互いに離間する方向に付勢され、前記駆動部材は前記係合テーパ部と係合する係合テーパ部を有し、前記一対の加圧パンチ部材はその係合テーパ部と前記駆動部材のテーパ部とによって互いに接近する方向に可動されることを特徴とするパイプ体の製造装置を用いたところにある。
請求項１７に記載のパイプ体の製造方法は、請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記合わせ目が前記合わせ目構成壁部の中央に位置していることを特徴とする。
請求項１８に記載のパイプ体の製造方法は、請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記パイプ体はその閉断面の形状が三角形又は五角形又は六角形であることを特徴とする。
請求項１９に記載のパイプ体の製造方法は、請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記パイプ体の加工は、前記金属プレートを折り曲げたときの延び量を見越して行われることを特徴とする。
【００２０】
本発明によれば、量産時にプレス成形によって合わせ目が密着したパイプ体をばらつきなく安定して製造することができる。
目次
（１）[パイプ体]
（２）[パイプ体の製造方法]
（ａ）[パイプ体の製造に使用する一次中間成形品]
（ｂ）[パイプ体の製造に使用する二次中間成形品]
（３）[パイプ体の製造装置]
（４）[パイプ体の作用の説明]
（５）[パイプ体のその他の角形状]
（６）[角柱形状パイプ体の変形例]
（７）[パイプ体の使用例]
【００２１】
【発明の実施の形態】
（１）[パイプ体]
図１は閉断面が角柱形状のパイプ体の概略構成を示す斜視図を示し、図２はその角柱形状のパイプ体の側面図を示している。
【００２２】
この図１、図２において、１はパイプ体を示している。このパイプ体１はここでは閉断面の幾何学的な形状が四角形、例えば正方形である。このパイプ体１は４個（複数個）の構成壁部としての底壁部２、この底壁部２に隣接する一対の隣接側壁部３、４、その底壁部２に対向する上壁部５からなっている。
【００２３】
上壁部５は一対の合わせ目構成壁部５ａ、５ｂからなり、一対の合わせ目構成壁部５ａ、５ｂの端面５ｃ、５ｄが互いに密着されて、上壁部５の中央に合わせ目５ｅが形成されている。
（２）[角柱形状のパイプ体の製造方法]
このパイプ体１は図３に示す矩形状の金属プレート６を素材として用い、プレス加工によって成形される。この金属プレート６にはあらかじめ取り付け用係合凹部としてのネジ穴６ａ、６ａが適宜箇所に形成され、このネジ穴６ａ、６ａはこのパイプ体１を後述する支持手段として用いて図示を略す複写機に取り付ける際に使用される。なお、ネジ穴６ａ、６ａの代わりに取り付け用係合凹部として切り欠きを設けても良い。
【００２４】
（ａ）[パイプ体の製造に使用する一次中間成形品]
まず、第１加工ステップとして、この金属プレート６を用いて合わせ目５ｅが属する一対の合わせ目構成壁部５ａ、５ｂを形成するために、この金属プレート６の一対の辺部６ｂ、６ｂをその辺に沿って延びる折り曲げ線６ｃ、６ｃに沿って直角（９０度）にかつ同方向に折り曲げて起立させ、図４に示すように互いに対向しかつ合わせ目構成壁部５ａ、５ｂがその辺部６ｂ、６ｂの延びる方向に長く延びる一次中間成形品８をプレス加工により形成する。その図４において、符号９は未折り曲げ部である。
【００２５】
この一次中間成形品８のプレス加工には、例えば、図５（イ）に示すプレス装置１０を用いる。このプレス装置１０は固定プレート１１と加圧パンチ部材１２と可動プレート１２’とから概略構成され、可動プレート１２’は固定プレート１１の凹所に摺動可能に設けられている。その可動プレート１２’は図示を略すプレス装置本体の油圧によって鉛直方向上方に付勢されている。金属プレート６は可動プレート１２’に載置され、固定プレート１１に対して距離Ｈだけ離れて浮いている。その可動プレート１２’の上方には加圧パンチ部材１２’が対向されている。
【００２６】
加圧パンチ部材１２を下降させ、金属プレート６を可動プレート１２’と加圧パンチ部材１２とで図５（ロ）に示すように狭持しつつ加圧することによって一次中間成形品８が形成される。
【００２７】
（ｂ）[パイプ体の製造に使用する二次中間成形品]
次いで、第２加工ステップとして、図３に示す折り曲げ線６ｄ、６ｄに沿って一次中間成形品８の未折り曲げ部９を折り曲げて、図６（イ）、図７に示す二次中間成形品１４を形成する。その金属プレート６の寸法、折り曲げ線の位置は、プレス加工による金属プレート６の延び量を見越して設計されている。
【００２８】
これによって、合わせ目構成壁部５ａ、５ｂ以外の残余の構成壁部として底壁部２に対応する一構成壁部１５とこの底壁部２に隣接して一対の側壁部３、４に対応する一対の隣接構成壁部１６、１６が形成される。その二次中間成形品１４の合わせ目５ｅは非密着状態である。
【００２９】
その一構成壁部１５は図６（ロ）に拡大して示すように、平坦部１５ａと平坦部１５ｂと湾曲部１５ｃとからなり、湾曲部１５ｃは平坦部１５ａと平坦部１５ｂとの間に位置し、平坦部１５ａは隣接構成壁部１６に隣接している。
【００３０】
その一対の平坦部１５ａと隣接構成壁部１６との成す角度θ１は、パイプ体１を完成させたときの底壁部２と一対の側壁部３、４との成す角度θ（図２参照）よりも大きい。ここでは、角度θは９０度であり、角度θ１は鈍角とされている。このように一対の屈曲部１５ａを設けることにすると後述する製造装置を用いて底壁部２を形成したときに合わせ目５ｅの密着性、底壁部２の平面性を確保することができる。また、角度θ１が同一の場合、この湾曲部１５ｃを設けることによって、合わせ目構成壁部５ａ、５ｂの開き量を大きくできる。
【００３１】
この図６、図７に示す二次中間成形品１４のプレス加工には、例えば、図８（イ）に示すプレス装置１７を用いる。そのプレス装置１７は固定プレート１９と加圧パンチ部材２０と可動プレート２０’とから概略なっている。可動プレート２０’は固定プレート１９の凹所に摺動可能に設けられ、図示を略すプレス装置本体の油圧により鉛直方向上方に付勢されている。
【００３２】
その固定プレート１９の凹所周壁１９ａはテーパ形状にされ、その凹所周壁１９ａと固定プレート１９の上面との成す角度はほぼθ１に等しい。加圧パンチ部材２０はパンチ部２０ａを有し、パンチ部２０ａの周壁２０ｂは凹所周壁１９に対応する形状とされている。また、パンチ部２０ａの下面は中間成形品１４の一構成壁部１５の形状を形成することができるように上方に向かって凹曲面形状とされている。可動プレート２０’の上面２０’ａはそのパンチ部２０ａの下面の形状に対応して上方に向かって凸面形状とされている。
【００３３】
一次中間成形品８は可動プレート２０’に載置され、固定プレート１９に対して隙間Ｈ’を開けて浮いている。加圧パンチ部材２０’を下降させ、一次中間成形品１４の一構成壁部を図８（ロ）に示すように可動プレート２０’と加圧パンチ部材２０とによって狭持しつつ加圧する。
【００３４】
これによって、二次中間成形品１４が形成される。次に、加圧パンチ部材２０を上昇させ、凹所１６から二次中間成形品１４を取り出し、紙面と直交する長手方向に二次中間成形品１４を加圧パンチ部材２０から引き抜いて、二次中間成形品１４を加圧パンチ部材２０から取り外す。
【００３５】
また、図８に示すプレス装置１７では、二次中間成形品１４を加圧パンチ部材２０から引き抜く構成としたが、図９に示すように、二次中間成形品１４の隣接構成壁部１６と底壁部１５との成す角度θ２を図６、図７に示す二次中間成形品１４の隣接構成壁部１６と一構成壁部１５との成す角度θ１よりも大きく形成すれば、加圧パンチ部材２０を上昇させるのみで、加圧パンチ部材２０から二次中間成形品１４を取り除くことができることになり、二次中間成形品１４をその長手方向に加圧パンチ部材２０から引き抜くという作業工程を省くことができることとなって、その分、成形作業の効率化を図ることができる。ここでは、パイプ体１の閉断面の形状が正方形の場合について説明しているが、閉断面の形状が図１０に示すような長方形の場合には、長方形の長辺に対応する隣接構成壁部１６の長さが長くなり、その長方形の短辺に対応する上壁部５を構成する一対の合わせ目構成壁部５ａ、５ａの開き量が大きくなるので、二中間成形品１４の隣接構成壁部１６と一構成壁部１５との成す角度がθ１のままでも加圧パンチ部材２０を上昇させるのみで、加圧パンチ部材２０から二次中間成形品１４を取り除くことができる。
（３）[パイプ体の製造装置]
次に、その二次中間成形品１４を完成品としてのパイプ体１に成形するために、図１１に示すプレス成形装置（加工装置本体）２１にセットする。
【００３６】
そのプレス成形装置２１は下型（固定型）２２と上型（可動型）２３とからなっている。下型２２は固定プレート２４を有し、上型２３は可動プレート２５を有する。固定プレート２４には一対のストッパー部材２６、２６、一対の加圧パンチ部材２７、２７が設けられている。この加圧パンチ部材２７、２７は摺動レール（図示を略す）上にスライド可能に設けられ、図示を略すスプリング部材によって互いに離間する方向に付勢されている。この加圧パンチ部材２７、２７は互いに離反接近する方向に摺動レール上を可動される。図６に示す二次中間成形品１４は一構成壁部１５が下向きになるようにして、加圧パンチ部材２７、２７の対向空間２８にセットされる。可動プレート２５には、加圧パンチ部材２７、２７を駆動するための駆動部材２９、２９が取り付けられている。
【００３７】
その駆動部材２９、２９の下端部にはテーパー部２９ａ、２９ａが形成され、加圧パンチ部材２７、２７の上端部にはテーパー部２９ａ、２９ａと係合するテーパー部２７ａ、２７ａが形成されている。また、加圧パンチ部材２７、２７のパンチ面２７ｂ、２７ｂには摩擦接触部材２７ｃ、２７ｃが設けられている。
【００３８】
図１１は下型２４と上型２５とが離間されて二次中間成形品１４が対向空間２８にセットされた状態が示されており、矢印Ａ１で示すように、上型２３を下降させると、図１２に示すように、駆動部材２９、２９のテーパー部２９ａ、２９ａが加圧パンチ部材２７、２７のテーパー部２７ａ、２７ａに係合し、加圧パンチ部材２７、２７が互いに接近する方向に可動され、加圧パンチ部材２７、２７の摩擦接触部材２７ｃ、２７ｃが隣接構成壁部１６、１６と合わせ目構成壁部５ａ、５ｂとの屈曲部３１に当接し、一対の隣接構成壁部１６、１６が外力Ｆ１により互いに接近する方向に加圧される。
【００３９】
これによって、一構成壁部１５に応力が集中するが、隣接構成壁部１４と屈曲部１５ａとの境界部分、屈曲部１５ａと平坦部１５ｂとの境界部分は加工硬化により変形し難く、平坦部１５ｂに固定プレート２６に当接する方向の力Ｆ２が働く。これと同時に、図１３に示すように、屈曲部１５ａには中間成形品１４を浮き上がらせようとする反力Ｒ１が働く。摩擦接触部材２７ｃと屈曲部３１との静止摩擦力Ｆ３が反力Ｒ１よりも大きな条件が保たれるように摩擦接触部材２７ｃの材料を選択すると、屈曲部１５ａと固定プレート２６との接触状態が維持される。
【００４０】
この接触状態を維持しつつ、更に、加圧パンチ部材２７、２７が互いに接近する方向に可動されると、図１４に示すように、屈曲部３１がパンチ面２７ｂ、２７ｂを上方に向かって若干ずれながら一対の構成壁部１６が起立されると共に、平坦部１５ｂが固定プレート２６との隙間がなくなる方向に変形して固定プレート２６に当接する。この平坦部１５ａの固定プレート２６への当接によって、平坦部１５ｂに反力Ｒ２が生じる。その摩擦接触部材２７ｃと屈曲部との静止摩擦力Ｆ３がその反力Ｒ２と反力Ｒ１との和以上であれば、平坦部１５ｂと固定プレート２６との接触状態が維持されつつ、平坦部１５ｂが固定プレート２６に当接する方向に更に変形される。
【００４１】
なお、この図において、符号δ１は仮に固定プレート２６がないとした場合に、合わせ目５ｅが密着するまで一対の加圧パンチ部材２７を互いに接近する方向に可動させて、その後加圧パンチ部材２７を互いに離間させる方向に可動させたときに、一構成壁部１５が元の凸曲面形状に戻ろうとするスプリングバック力に基づく開き量であり、符号δ２は後述するスプリングバック力に基づく閉じ量である。
【００４２】
この図１４に示す状態から、更に、上型２３を下降させると、可動パンチ部材２７、２７のテーパー部２７ａ、２７ａと駆動部材２９、２９のテーパー部２９ａ、２９ａとの係合が解除されて、図１５に示すように、加圧パンチ部材２７、２７の可動が停止され、合わせ目構成壁部５ａ、５ｂの端面同士が互いに密着されて、合わせ目５ｅが密着した上壁部５が形成されると共に、一対の側壁部３、４、底壁部２が形成される。この図１４に示す状態から図１５に示す状態に至るまでの過程で、合わせ目５ｅは閉じ量δ２に相当する分だけ変位する。
【００４３】
次に、上型２３を上昇させると、駆動部材２９、２９と加圧パンチ部材２７、２７との係合が解除される。この係合解除によって、加圧パンチ部材２７、２７が互いに離間する方向に可動されて、側壁部３、４に加わっていた外力Ｆ１、底壁部２に加わっていた外力Ｆ２、反力Ｒ１、Ｒ２が取り除かれて図１、図２に示すパイプ体１が成形される。
（４）[パイプ体の作用の説明]
図１６はこのようにして形成されたパイプ体１の作用の説明図である。この図１６（イ）に示すパイプ体１の底壁部２は、図１６（ロ）に示すように外力Ｆ２が取り除かれたことによって元の形状に戻ろうとするスプリングバック力ｆ２が生じ、これによって、合わせ目構成壁部５ａ、５ｂが互いに離間する方向に変位しようとし、合わせ目５ｅが開き量δ１だけ開こうとする。
【００４４】
一方、底壁部２は、図１６（ハ）に示すように反力Ｒ２が取り除かれたことによって元の形状に戻ろうとするスプリングバック力ｒ２が生じる。このスプリングバック力ｒ２に基づく合わせ目５ｅの閉じ量δ２をスプリングバック力ｆ２に基づく合わせ目５ｅの開き量δ１以上に設定すれば、加圧パンチ部材２７、２７による側壁部３、４への外力を取り去ったとしても、合わせ目５ｅ同士の密着状態が保たれる。
【００４５】
このパイプ体の製造装置では、摩擦接触部材２７ｃを加圧パンチ部材２７に設けて、中間成形品１４の一対の隣接構成壁部１６の加圧中に、一構成壁部１５と固定プレート２４との接触状態を維持することにしたが、図１７に示すように、加圧パンチ部材２７に係合突起２７ｃ’を設けて、中間成形品１４の一対の隣接構成壁部１６の加圧中に、一構成壁部１５と固定プレート２４との接触状態を維持させるようにしても良い。
（５）[パイプ体のその他の角形状]
また、この発明の実施の形態では、閉断面の幾何学的な形状が矩形（正方形又は長方形）のパイプ体１を成形する場合について説明したが、図１８に示すように、閉断面の幾何学的形状が三角形（図１８（イ）参照）、五角形（図１８（ロ）参照）、六角形（図１８（ハ）参照）のパイプ体１を成形することもできる。なお、その図１８（ロ）、（ハ）において、符号５’は残余の構成壁部を示している。
（６）[角柱形状パイプ体の変形例]
また、この発明の実施の形態では、凸曲面部に戻ろうとするスプリングバック力のみに基づいて、合わせ目５ｅの密着状態を確保する構成としたが、図１９（イ）に示すように、金属プレート６の辺部６ｂ、６ｂに係合部としての係合突起３５を形成すると共に係合凹所３６を形成し、係合凹所３６には係合突起３５に食い込む三角形状の食い込み突起３７を形成し、図１９（ロ）に拡大して示すように、係合突起３５を食い込み突起３７によって変形させて、一対の合わせ目構成壁部５ａ、５ｂ同士を噛み合わせる構成としてもよい。図１９（ハ）はこのようにして形成されたパイプ体１を示しており、このパイプ体１によれば、凸曲面部に戻ろうとするときに生じるスプリングバック力に基づく一対の合わせ目構成壁部５ａ、５ｂの密着性が確保されることに加えて、係合部同士の係合によっても一対の合わせ目構成壁部５ａ、５ｂの密着性が確保されることになる。
（７）[パイプ体の使用例]
このパイプ体１は、例えば、図２０（イ）、（ロ）に示すように、例えばファックス兼用複写機の支持手段としての片持ち式フレーム体３８に用いられる。そのパイプ体１には載置フレーム３９が取り付けられ、この載置フレーム３９には例えばスキャナーユニット（図示を略す）が載置される。
【００４６】
【発明の効果】
本発明によるパイプ体の製造装置及びパイプ体の製造方法によれば、量産時にプレス成形によって合わせ目が密着したパイプ体をばらつきなく安定して製造できる。
【図面の簡単な説明】
【図１】本発明に係わるパイプ体の外観形状を示す斜視図である。
【図２】図１に示すパイプ体の側面図である。
【図３】図１、図２に示すパイプ体の形成に使用する金属プレートの平面図である。
【図４】本発明に係わる一次中間成形品の側面図である。
【図５】本発明に係わる一次中間成形品のプレス加工に用いるプレス装置の一例を示す概要図であって、（イ）は金属プレートを可動プレートに載置した状態を示し、（ロ）はその金属プレートを加圧して一次中間成形品を製造した状態を示す。
【図６】本発明に係わる二次中間成形品の側面図であって、（イ）はその全体形状を示す図であり、（ロ）はその部分拡大図である。
【図７】本発明に係わる二次中間成形品の外観形状を示す斜視図である。
【図８】図６、図７に示す二次中間成形品のプレス加工に用いるプレス装置の一例を示す概要図であって、（イ）は一次中間成形品を可動プレートに載置した状態を示し、（ロ）はその一次中間成形品を加圧して二次中間成形品を製造した状態を示す。
【図９】図６に示す二次中間成形品のプレス加工に用いるプレス装置の他の例を示す概要図である。
【図１０】本発明に係わるパイプ体の閉断面の形状が長方形の場合の説明図である。
【図１１】本発明に係わるパイプ体の製造装置の概略構成を示す図であって、図６に示す二次成形品を加工装置本体にセットした状態を示す図である。
【図１２】図６に示す二次中間成形品の屈曲部に加圧パンチ部材が当接した状態を示す部分拡大図である。
【図１３】図１２に示す二次中間成形品に作用する外力の説明図である。
【図１４】図１２に示す二次中間成形品の加工変形状態を示す説明図である。
【図１５】図１１に示すパイプ体の製造装置の一対の加圧パンチ部材が可動停止した状態を示す図である。
【図１６】一対の側壁部に生じるスプリングバック力に基づく二次中間成形品の合わせ目の開きを説明するための説明図で、（イ）は合わせ目が密着した状態のパイプ体を示し、（ロ）は底壁部に加わっている合わせ目を開こうとするスプリングバック力ｆ２に基づき仮想的に合わせ目が開いた状態を示す説明図であり、（ハ）は底壁部に加わる合わせ目を閉じようとするスプリングバック力ｒ２による合わせ目の閉じ量の説明図である。
【図１７】図１１に示すパイプ体の製造装置の変形例を示す図である。
【図１８】本発明に係わるパイプ体の他の形状を説明するための説明図であって、（イ）は三角形状のパイプ体を示し、（ロ）は五角形状のパイプ体を示し、（ハ）は六角形状のパイプ体を示す。
【図１９】本発明に係わるパイプ体の変形例を説明するための説明図であって、（イ）はこの変形例に使用する金属プレートの平面図を示し、（ロ）はこの金属プレートの係合部同士を係合させた状態を示し、（ハ）はその変形例のパイプ体の外観形状を示す斜視図である。
【図２０】本発明に係わるパイプ体を複写機の支持手段に用いた例を示し、（イ）はその支持手段の斜視図、（ロ）はその支持手段の側面図である。
【符号の説明】
１パイプ体
２、３、４構成壁部
５ａ、５ｂ合わせ目構成壁部
５ｅ合わせ目
６金属プレート
１４中間成形品
１５一構成壁部
１５ａ屈曲部
１５ｂ平坦部
１６隣接構成壁部
２２固定型
２４固定プレート
２７加圧パンチ部材
３１屈曲部[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to a technical field in which a pipe body is manufactured by bending a metal plate.
[0002]
[Prior art]
Conventionally, a technique described in Japanese Patent Application Laid-Open No. 11-290940 is known as a technique for manufacturing a pipe body, for example, a prismatic pipe body, by bending a metal plate.
[0003]
The one disclosed in Japanese Patent Application Laid-Open No. 11-290940 uses a rectangular metal plate as a material to form a prismatic pipe body by press working.
[0004]
This prismatic pipe body processing method is such that both ends (a pair of sides) in the width direction of the metal plate are bent along the length direction (direction in which the sides extend) and at right angles in the same direction, and the flanges face each other. A first bending step of forming a primary molded product having a base plate portion connecting a flange portion facing each other (a seam-constituting wall portion) and a predetermined width along the length direction of the bottom plate portion of the primary molded product And forming a secondary molded product having a pair of side wall portions facing each other and having a substantially U-shaped cross section. And a wrist-like process of pressing the pair of side wall portions of the secondary molded product toward each other inward and abutting the end faces (joints) of the pair of flange portions (joint-constituting wall portions). .
[0005]
According to this method of processing a prismatic pipe body, when the secondary molded product is formed, the concave curved surface formed on the bottom plate portion of the secondary molded product presses the pair of side wall portions toward each other inward. In order to fulfill the function of suppressing the generated springback force, a prismatic pipe body having a square cross section in which the end faces of the flange portions are in close contact with each other can be manufactured only by press molding without welding the end faces of the flange portions.
[0006]
[Problems to be solved by the invention]
However, in this conventional method of processing a prismatic pipe body, when forming the secondary molded product, the concave curved surface formed on the bottom plate portion of the secondary molded product presses the pair of side wall portions toward each other inward. Although the spring back force that suppresses the spring back force caused by this is fulfilled, the spring back force that tries to open outwards remains on the pair of side wall portions, and the flange portion (joint constituting wall portion at the time of mass production) It is difficult to stably produce a prismatic pipe body in which end faces (joints) of () are in close contact with each other.
[0007]
That is, when performing an inspection of whether or not the end surfaces of the flange portions of the prismatic pipe body manufactured by this processing method are in close contact with each other, there are those in which the end surfaces are in close contact with each other, There are quite a few gaps in the joints due to the existing springback force.
[0008]
  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a pipe body that can stably produce a pipe body in which seams are closely adhered to each other by press molding during mass production.Providing manufacturing equipment and pipe body manufacturing methodThere is to do.
[0009]
[Means for Solving the Problems]
  The apparatus for manufacturing a pipe body according to claim 1 has a closed cross section in which a rectangular metal plate is used as a raw material and has a plurality of constituent wall portions and a seam, and the seam is closely attached based on a springback force. A pair of bends on both sides of the seam-constituting wall part and the flat part to which the seam belongs by bending a plurality of locations of the metal plate along a direction along its side, used to form a square pipe body And a pair of adjacent constituent wall portions adjacent to the one constituent wall portion, the seam is in a non-contact state, and the adjacent constituent wall portion and the bent portion are formed. The processing apparatus main body is set with an intermediate molded product having an angle larger than the angle when the pipe body is completed. The processing apparatus main body has a fixed mold, and the fixed mold includes the pair of bent portions. Abutting between the flat part A fixed plate on which the intermediate molded product is placed with a gap therebetween, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pressure punch member includes a reaction force generated when the flat portion is deformed in a contact direction with respect to the fixed plate based on the pressure of the pair of adjacent constituent wall portions, and the flat portion to the fixed plate. The abutting state of the one constituent wall portion against the fixed plate against the reaction force generated by maintaining the flatness of the one constituent wall portion after the abuttingMade of a material having a static friction force to maintainA friction contact member is provided, which is in contact with the bent portion of the seam-constituting wall portion and suppresses the rise of the intermediate molded product due to pressurization of the pair of adjacent constituent wall portions.
[0010]
The apparatus for manufacturing a pipe body according to claim 2 has a closed cross section in which a rectangular metal plate is used as a raw material and has a plurality of constituent wall portions and seams, and the seams are in close contact with each other based on a springback force. Used to form a rectangular pipe body,
One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set. The processing apparatus main body has a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pressure punch member has the pair of adjacent structures. The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the wall portion and the flatness of the one wall portion after the flat portion comes into contact with the fixed plate. The pair of paired walls are engaged with the bent portion of the seam-constituting wall so that the contact state of the one-constituting wall with the fixed plate is maintained against the reaction force generated by the maintaining. An engagement protrusion for suppressing the rise of the intermediate molded product due to pressurization of adjacent constituent wall portions is provided.
[0011]
The pipe body manufacturing apparatus according to claim 3 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the shape of the closed cross section of the pipe body is rectangular, and each of the constituent walls of the pipe body The portion constitutes each side of the rectangle and corresponds to one constituent wall portion of the intermediate molded product, a pair of side wall portions corresponding to a pair of adjacent constituent wall portions of the intermediate molded product, and the intermediate molded product And an upper wall portion corresponding to the seam constituting wall portion.
[0012]
The pipe body manufacturing apparatus according to claim 4 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the processing apparatus body has a movable mold that is movable to face the fixed mold. The movable mold is provided with a movable plate and a drive member provided on the movable plate and movable in a direction in which the pair of pressure punch members are brought close to each other.
[0013]
The pipe body manufacturing apparatus according to claim 5 is the pipe body manufacturing apparatus according to claim 4, wherein the pair of pressure punch members are added in a state where the one structural wall portion is in contact with the fixed plate. The movement is stopped while maintaining the pressure.
[0014]
The pipe body manufacturing apparatus according to a sixth aspect is the pipe body manufacturing apparatus according to the fourth aspect, wherein the pair of pressure punch members have engagement taper portions and are urged away from each other. The drive member has an engagement taper portion that engages with the engagement taper portion, and the pair of pressure punch members are movable toward each other by the engagement taper portion and the taper portion of the drive member. It is characterized by being.
[0015]
The pipe body manufacturing apparatus according to claim 7 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the seam is located at a center of the seam constituting wall portion. And
[0017]
  Claim 8The pipe body manufacturing apparatus according to claim 1 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the pipe body has a closed cross-sectional shape of a triangle, a pentagon, or a hexagon. .
[0018]
  Claim 9The pipe body manufacturing apparatus according to claim 1 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the processing of the pipe body is performed in anticipation of an extension amount when the metal plate is bent. It is characterized by.
[0019]
  The pipe body manufacturing apparatus according to claim 10 is the pipe body manufacturing apparatus according to claim 1 or 2, wherein the pair of pressure punch members are moved up and down to separate and approach. A punch member is provided.
  The manufacturing method of a pipe body according to claim 11 has a closed cross section in which a rectangular metal plate is used as a raw material and has a plurality of constituent wall portions and seams, and the seams are in close contact based on springback force. Used to form a rectangular pipe body,
One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set, the processing apparatus main body having a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pair of adjacent structures on the pressure punch member The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the flat portion, and the flatness of the one wall portion is maintained after the flat portion is brought into contact with the fixed plate. Made of a material having a static frictional force that maintains the abutting state of the one constituent wall portion against the fixed plate against the reaction force caused by the contact, and in contact with the bent portion of the joint constituent wall portion The pipe body manufacturing apparatus is provided with a friction contact member that suppresses the rise of the intermediate molded product due to the pressurization of the pair of adjacent constituent wall portions.
The manufacturing method of a pipe body according to claim 12 has a closed cross section in which a rectangular metal plate is used as a raw material and has a plurality of constituent wall portions and a seam, and the seam is closely attached based on a springback force. Used to form a rectangular pipe body,
One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set. The processing apparatus main body has a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pressure punch member has the pair of adjacent structures. The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the wall portion and the flatness of the one wall portion after the flat portion comes into contact with the fixed plate. The pair of paired walls are engaged with the bent portion of the seam-constituting wall so that the contact state of the one-constituting wall with the fixed plate is maintained against the reaction force generated by the maintaining. The present invention uses a pipe body manufacturing apparatus provided with an engagement protrusion for suppressing the rise of the intermediate molded product due to the pressurization of the adjacent structural wall portion.
The pipe body manufacturing method according to claim 13 is the pipe body manufacturing and mounting method according to claim 11 or claim 12, wherein the closed cross-sectional shape of the pipe body is rectangular, and each configuration of the pipe body The wall portion constitutes each side of the rectangle and a bottom wall portion corresponding to one constituent wall portion of the intermediate molded product, a pair of side wall portions corresponding to a pair of adjacent constituent wall portions of the intermediate molded product, and the intermediate molding It consists of the upper wall part corresponding to the seam structure wall part of goods.
The pipe body manufacturing method according to claim 14 is the pipe body manufacturing method according to claim 11 or claim 12, wherein the processing apparatus main body has a movable mold movable to face the fixed mold. An apparatus for manufacturing a pipe body, wherein the movable die is provided with a movable plate and a drive member provided on the movable plate and movable in a direction in which the pair of pressure punch members are brought close to each other. It is in use.
The pipe body manufacturing method according to claim 15 is the pipe body manufacturing method according to claim 14. The pair of pressure punch members is used in the pipe body manufacturing apparatus, wherein the movable body is stopped while maintaining the pressurizing force in a state where the one wall portion is in contact with the fixed plate. By the way.
A pipe body manufacturing method according to a sixteenth aspect is the pipe body manufacturing method according to the fourteenth aspect, wherein the pair of pressure punch members have engagement taper portions and are urged away from each other. The drive member has an engagement taper portion that engages with the engagement taper portion, and the pair of pressure punch members are movable toward each other by the engagement taper portion and the taper portion of the drive member. It is in the place where the manufacturing apparatus of the pipe body characterized by being used.
The pipe body manufacturing method according to claim 17 is the pipe body manufacturing method according to claim 11 or 12, wherein the seam is located in the center of the seam constituting wall portion. And
The pipe body manufacturing method according to claim 18 is the pipe body manufacturing method according to claim 11 or 12, wherein the pipe body has a closed cross-sectional shape of a triangle, a pentagon or a hexagon. Features.
The pipe body manufacturing method according to claim 19 is the pipe body manufacturing method according to claim 11 or claim 12, wherein the pipe body is processed in anticipation of an extension amount when the metal plate is bent. It is performed.
[0020]
According to the present invention, it is possible to stably produce a pipe body in which seams are in close contact by press molding during mass production without any variation.
table of contents
(1) [Pipe]
(2) [Pipe body manufacturing method]
(A) [Primary intermediate molded product used for manufacturing pipe bodies]
(B) [Secondary intermediate molded product used for manufacturing pipe bodies]
(3) [Pipe body manufacturing equipment]
(4) [Description of the action of the pipe body]
(5) [Other square shapes of pipe body]
(6) [Modification of prismatic pipe body]
(7) [Pipe body usage example]
[0021]
DETAILED DESCRIPTION OF THE INVENTION
(1) [Pipe]
FIG. 1 is a perspective view showing a schematic configuration of a pipe body having a prismatic closed section, and FIG. 2 is a side view of the pipe body having a prismatic shape.
[0022]
1 and 2, reference numeral 1 denotes a pipe body. The pipe body 1 here has a closed cross-section with a square shape, for example, a square shape. The pipe body 1 includes four (a plurality of) bottom wall portions 2 as constituent wall portions, a pair of adjacent side wall portions 3 and 4 adjacent to the bottom wall portion 2, and an upper wall portion facing the bottom wall portion 2. It consists of five.
[0023]
The upper wall portion 5 includes a pair of seam-constituting wall portions 5a and 5b. The end surfaces 5c and 5d of the pair of seam-constituting wall portions 5a and 5b are in close contact with each other, and a seam 5e is formed at the center of the upper wall portion 5. Is formed.
(2) [Method of manufacturing prismatic pipe body]
The pipe body 1 is formed by press working using a rectangular metal plate 6 shown in FIG. 3 as a material. Screw holes 6a and 6a as engagement recesses for attachment are formed in the metal plate 6 in advance at appropriate locations, and the screw holes 6a and 6a are not shown in the drawing using the pipe body 1 as support means described later. Used when attaching to. In addition, you may provide a notch as an engagement recessed part for attachment instead of the screw holes 6a and 6a.
[0024]
(A) [Primary intermediate molded product used for manufacturing pipe bodies]
First, as a first processing step, in order to form a pair of seam constituting wall portions 5a and 5b to which the seam 5e belongs using the metal plate 6, the pair of side portions 6b and 6b of the metal plate 6 are Bending lines 6c and 6c extending along the sides are bent at a right angle (90 degrees) and in the same direction, and are erected and face each other as shown in FIG. A primary intermediate molded product 8 extending long in the extending direction of 6b, 6b is formed by press working. In FIG. 4, reference numeral 9 denotes an unfolded portion.
[0025]
For the press work of the primary intermediate molded product 8, for example, a press device 10 shown in FIG. The pressing apparatus 10 is generally composed of a fixed plate 11, a pressure punch member 12, and a movable plate 12 ′, and the movable plate 12 ′ is slidably provided in a recess of the fixed plate 11. The movable plate 12 'is urged upward in the vertical direction by the hydraulic pressure of a press device main body (not shown). The metal plate 6 is placed on the movable plate 12 ′ and floats away from the fixed plate 11 by a distance H. A pressure punch member 12 'is opposed to the movable plate 12'.
[0026]
The pressure punch member 12 is lowered, and the metal plate 6 is pressed while being held between the movable plate 12 ′ and the pressure punch member 12 as shown in FIG. The
[0027]
(B) [Secondary intermediate molded product used for manufacturing pipe bodies]
Next, as a second processing step, the unfolded portion 9 of the primary intermediate molded product 8 is bent along the fold lines 6d and 6d shown in FIG. 3, and the secondary intermediate molded product 14 shown in FIGS. Form. The dimension of the metal plate 6 and the position of the fold line are designed in anticipation of the amount of extension of the metal plate 6 by pressing.
[0028]
Accordingly, one constituent wall 15 corresponding to the bottom wall 2 as a remaining constituent wall other than the seam constituent walls 5a and 5b and a pair of side walls 3 and 4 adjacent to the bottom wall 2 are supported. A pair of adjacent constituent wall portions 16, 16 is formed. The joint 5e of the secondary intermediate molded product 14 is in a non-contact state.
[0029]
As shown in an enlarged view of FIG. 6 (b), the one constituent wall portion 15 includes a flat portion 15a, a flat portion 15b, and a curved portion 15c. The curved portion 15c is interposed between the flat portion 15a and the flat portion 15b. The flat portion 15 a is located adjacent to the adjacent component wall portion 16.
[0030]
The angle θ1 formed between the pair of flat portions 15a and the adjacent constituent wall portion 16 is the angle θ formed between the bottom wall portion 2 and the pair of side wall portions 3 and 4 when the pipe body 1 is completed (see FIG. 2). Bigger than. Here, the angle θ is 90 degrees, and the angle θ1 is an obtuse angle. By providing the pair of bent portions 15a in this way, the adhesion of the joint 5e and the flatness of the bottom wall portion 2 can be ensured when the bottom wall portion 2 is formed using a manufacturing apparatus described later. When the angle θ1 is the same, the opening amount of the seam constituting wall portions 5a and 5b can be increased by providing the curved portion 15c.
[0031]
For the pressing of the secondary intermediate molded product 14 shown in FIGS. 6 and 7, for example, a press device 17 shown in FIG. The press device 17 is schematically composed of a fixed plate 19, a pressure punch member 20, and a movable plate 20 '. The movable plate 20 ′ is slidably provided in the recess of the fixed plate 19 and is urged upward in the vertical direction by the hydraulic pressure of the press device main body (not shown).
[0032]
The concave peripheral wall 19a of the fixed plate 19 is tapered, and the angle formed by the concave peripheral wall 19a and the upper surface of the fixed plate 19 is substantially equal to θ1. The pressure punch member 20 has a punch portion 20 a, and the peripheral wall 20 b of the punch portion 20 a has a shape corresponding to the recess peripheral wall 19. Further, the lower surface of the punch portion 20a is formed in a concave curved surface shape upward so that the shape of the one wall portion 15 of the intermediate molded product 14 can be formed. The upper surface 20'a of the movable plate 20 'has a convex shape toward the upper side corresponding to the shape of the lower surface of the punch portion 20a.
[0033]
The primary intermediate molded product 8 is placed on the movable plate 20 ′ and floats with a gap H ′ with respect to the fixed plate 19. The pressure punch member 20 ′ is lowered, and the constituent wall portion of the primary intermediate molded product 14 is pressed while being sandwiched between the movable plate 20 ′ and the pressure punch member 20 as shown in FIG.
[0034]
Thereby, the secondary intermediate molded product 14 is formed. Next, the pressure punch member 20 is raised, the secondary intermediate molded product 14 is taken out from the recess 16, and the secondary intermediate molded product 14 is pulled out from the pressure punch member 20 in the longitudinal direction perpendicular to the paper surface. The intermediate molded product 14 is removed from the pressure punch member 20.
[0035]
Further, in the press device 17 shown in FIG. 8, the secondary intermediate molded product 14 is pulled out from the pressure punch member 20, but as shown in FIG. 9, the adjacent component wall 16 of the secondary intermediate molded product 14 and If the angle θ2 formed with the bottom wall portion 15 is larger than the angle θ1 formed between the adjacent component wall portion 16 and the one component wall portion 15 of the secondary intermediate molded product 14 shown in FIGS. The secondary intermediate molded product 14 can be removed from the pressure punch member 20 simply by raising the member 20, and the work process of pulling out the secondary intermediate molded product 14 from the pressure punch member 20 in the longitudinal direction thereof is performed. As a result, the efficiency of the molding operation can be improved accordingly. Here, the case where the shape of the closed cross section of the pipe body 1 is a square is described. However, when the shape of the closed cross section is a rectangle as shown in FIG. 10, the adjacent constituent wall portion corresponding to the long side of the rectangle. Since the length of 16 becomes longer and the opening amount of the pair of seam-constituting wall portions 5a, 5a constituting the upper wall portion 5 corresponding to the short side of the rectangle becomes larger, the adjacent constituent walls of the two intermediate molded product 14 Even if the angle formed by the portion 16 and the one constituent wall portion 15 remains θ1, the secondary intermediate molded product 14 can be removed from the pressure punch member 20 only by raising the pressure punch member 20.
(3) [Pipe body manufacturing equipment]
Next, in order to form the secondary intermediate molded product 14 into the pipe body 1 as a finished product, it is set in a press molding apparatus (processing apparatus main body) 21 shown in FIG.
[0036]
The press molding apparatus 21 includes a lower mold (fixed mold) 22 and an upper mold (movable mold) 23. The lower mold 22 has a fixed plate 24, and the upper mold 23 has a movable plate 25. The fixed plate 24 is provided with a pair of stopper members 26 and 26 and a pair of pressure punch members 27 and 27. The pressure punch members 27 and 27 are slidably provided on a slide rail (not shown) and are urged in a direction away from each other by a spring member not shown. The pressure punch members 27 and 27 are moved on the slide rail in a direction of separating and approaching each other. The secondary intermediate molded product 14 shown in FIG. 6 is set in the facing space 28 of the pressure punch members 27 and 27 with the one constituent wall portion 15 facing downward. Drive members 29 and 29 for driving the pressure punch members 27 and 27 are attached to the movable plate 25.
[0037]
Tapered portions 29a, 29a are formed at the lower end portions of the drive members 29, 29, and tapered portions 27a, 27a that engage with the tapered portions 29a, 29a are formed at the upper end portions of the pressure punch members 27, 27. Yes. Friction contact members 27c and 27c are provided on the punch surfaces 27b and 27b of the pressure punch members 27 and 27, respectively.
[0038]
FIG. 11 shows a state in which the lower mold 24 and the upper mold 25 are separated from each other and the secondary intermediate molded product 14 is set in the facing space 28. When the upper mold 23 is lowered as indicated by an arrow A1, FIG. 12, the taper portions 29a and 29a of the drive members 29 and 29 are engaged with the taper portions 27a and 27a of the pressure punch members 27 and 27, and the pressure punch members 27 and 27 approach each other. The frictional contact members 27c, 27c of the pressure punch members 27, 27 are in contact with the bent portions 31 of the adjacent constituent wall portions 16, 16 and the seam constituent wall portions 5a, 5b, and a pair of adjacent constituent wall portions 16 and 16 are pressurized in the direction approaching each other by the external force F1.
[0039]
As a result, stress concentrates on one constituent wall portion 15, but the boundary portion between the adjacent constituent wall portion 14 and the bent portion 15a, and the boundary portion between the bent portion 15a and the flat portion 15b are not easily deformed by work hardening. A force F2 in the direction of abutting on the fixed plate 26 acts on 15b. At the same time, as shown in FIG. 13, a reaction force R <b> 1 is exerted on the bent portion 15 a to try to lift the intermediate molded product 14. When the material of the friction contact member 27c is selected so that the static friction force F3 between the friction contact member 27c and the bent portion 31 is maintained larger than the reaction force R1, the contact state between the bent portion 15a and the fixed plate 26 is changed. Maintained.
[0040]
When the pressure punch members 27 and 27 are further moved in the direction approaching each other while maintaining this contact state, the bent portion 31 slightly moves upwards from the punch surfaces 27b and 27b as shown in FIG. The pair of constituent wall portions 16 are erected while being displaced, and the flat portion 15 b is deformed in a direction in which there is no gap between the fixed plate 26 and contacts the fixed plate 26. A reaction force R2 is generated in the flat portion 15b by the contact of the flat portion 15a with the fixing plate 26. If the static friction force F3 between the friction contact member 27c and the bent portion is equal to or greater than the sum of the reaction force R2 and the reaction force R1, the flat portion 15b is maintained while the contact state between the flat portion 15b and the fixed plate 26 is maintained. Is further deformed in the direction of abutting against the fixed plate 26.
[0041]
In this figure, the symbol δ1 indicates that if there is no fixed plate 26, the pair of pressure punch members 27 are moved in a direction approaching each other until the joint 5e comes into close contact, and then the pressure punch member 27 is moved. Is the opening amount based on the springback force that causes the one component wall portion 15 to return to the original convex curved surface shape, and reference numeral δ2 is the closing amount based on the springback force described later. is there.
[0042]
When the upper die 23 is further lowered from the state shown in FIG. 14, the engagement between the tapered portions 27 a and 27 a of the movable punch members 27 and 27 and the tapered portions 29 a and 29 a of the driving members 29 and 29 is released. As shown in FIG. 15, the movement of the pressure punch members 27, 27 is stopped, the end surfaces of the seam-constituting wall parts 5a, 5b are brought into close contact with each other, and the upper wall part 5 with the seam 5e in close contact is formed In addition, a pair of side wall portions 3 and 4 and a bottom wall portion 2 are formed. In the process from the state shown in FIG. 14 to the state shown in FIG. 15, the joint 5e is displaced by an amount corresponding to the closing amount δ2.
[0043]
Next, when the upper mold 23 is raised, the engagement between the drive members 29 and 29 and the pressure punch members 27 and 27 is released. By this disengagement, the pressure punch members 27 and 27 are moved in directions away from each other, and the external force F1 applied to the side walls 3 and 4, the external force F2 applied to the bottom wall 2 and the reaction force R1, R2 is removed, and the pipe body 1 shown in FIGS. 1 and 2 is formed.
(4) [Description of the action of the pipe body]
FIG. 16 is an explanatory view of the operation of the pipe body 1 formed in this way. The bottom wall portion 2 of the pipe body 1 shown in FIG. 16 (a) has a springback force f2 that tries to return to its original shape by removing the external force F2 as shown in FIG. 16 (b). As a result, the seam constituting wall portions 5a and 5b try to be displaced in a direction away from each other, and the seam 5e tries to open by the opening amount δ1.
[0044]
On the other hand, as shown in FIG. 16C, the bottom wall 2 has a springback force r2 that attempts to return to the original shape by removing the reaction force R2. If the closing amount δ2 of the seam 5e based on the springback force r2 is set to be greater than or equal to the opening amount δ1 of the seam 5e based on the springback force f2, the external force applied to the side walls 3 and 4 by the pressure punch members 27 and 27. Even if it is removed, the contact state between the joints 5e is maintained.
[0045]
In this pipe body manufacturing apparatus, the friction contact member 27 c is provided on the pressure punch member 27, and during the pressurization of the pair of adjacent constituent wall portions 16 of the intermediate molded product 14, the one constituent wall portion 15, the fixed plate 24, However, as shown in FIG. 17, an engagement protrusion 27 c ′ is provided on the pressure punch member 27 to press the pair of adjacent constituent wall portions 16 of the intermediate molded product 14. The contact state between the one component wall 15 and the fixed plate 24 may be maintained.
(5) [Other square shapes of pipe body]
In the embodiment of the present invention, the case where the pipe body 1 having a closed cross-section geometric shape of a rectangle (square or rectangular) is formed has been described. However, as shown in FIG. It is also possible to form the pipe body 1 having a triangular shape (see FIG. 18 (a)), a pentagon (see FIG. 18 (b)), or a hexagon (see FIG. 18 (c)). In FIGS. 18 (b) and 18 (c), reference numeral 5 'denotes the remaining constituent wall portion.
(6) [Modification of prismatic pipe body]
In the embodiment of the present invention, the close contact state of the seam 5e is ensured based only on the springback force to return to the convex curved surface portion. However, as shown in FIG. An engaging protrusion 35 as an engaging portion is formed on the sides 6 b and 6 b of the plate 6 and an engaging recess 36 is formed. The engaging recess 36 has a triangular biting protrusion 37 that bites into the engaging protrusion 35. As shown in an enlarged view in FIG. 19 (b), the engagement protrusion 35 may be deformed by the biting protrusion 37 to engage the pair of seam-constituting wall portions 5a and 5b. FIG. 19 (c) shows the pipe body 1 formed in this way. According to this pipe body 1, a pair of seam-constituting walls based on the springback force generated when trying to return to the convex curved surface portion. In addition to ensuring the adhesion between the portions 5a and 5b, the adhesion between the pair of seam-constituting wall portions 5a and 5b is also ensured by the engagement between the engagement portions.
(7) [Pipe body usage example]
For example, as shown in FIGS. 20A and 20B, the pipe body 1 is used for a cantilever type frame body 38 as a supporting means of a facsimile / copier. A mounting frame 39 is attached to the pipe body 1, and a scanner unit (not shown) is mounted on the mounting frame 39, for example.
[0046]
【The invention's effect】
  Of the pipe body according to the inventionAccording to the manufacturing apparatus and the manufacturing method of the pipe body,A pipe body in which the joints are in close contact by press molding during mass production can be stably produced without variation.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external shape of a pipe body according to the present invention.
FIG. 2 is a side view of the pipe body shown in FIG.
3 is a plan view of a metal plate used for forming the pipe body shown in FIGS. 1 and 2. FIG.
FIG. 4 is a side view of a primary intermediate molded product according to the present invention.
FIG. 5 is a schematic view showing an example of a press apparatus used for press working of a primary intermediate molded product according to the present invention, wherein (a) shows a state where a metal plate is placed on a movable plate, and (b) shows The state which pressurized the metal plate and manufactured the primary intermediate molded product is shown.
6A and 6B are side views of a secondary intermediate molded product according to the present invention, in which FIG. 6A is a view showing the entire shape thereof, and FIG. 6B is a partially enlarged view thereof.
FIG. 7 is a perspective view showing an external shape of a secondary intermediate molded product according to the present invention.
FIG. 8 is a schematic view showing an example of a press device used for pressing the secondary intermediate molded product shown in FIGS. 6 and 7, wherein (a) shows a state in which the primary intermediate molded product is placed on a movable plate. (B) shows a state in which a secondary intermediate molded product is manufactured by pressurizing the primary intermediate molded product.
FIG. 9 is a schematic diagram showing another example of a press device used for pressing the secondary intermediate molded product shown in FIG. 6;
FIG. 10 is an explanatory diagram when the shape of the closed section of the pipe body according to the present invention is a rectangle.
11 is a diagram showing a schematic configuration of a pipe body manufacturing apparatus according to the present invention, and is a diagram showing a state in which the secondary molded product shown in FIG. 6 is set in a processing apparatus main body.
12 is a partially enlarged view showing a state in which a pressure punch member is in contact with a bent portion of the secondary intermediate molded product shown in FIG. 6. FIG.
13 is an explanatory diagram of an external force acting on the secondary intermediate molded product shown in FIG.
14 is an explanatory view showing a state of deformation of the secondary intermediate molded product shown in FIG. 12; FIG.
15 is a view showing a state where a pair of pressure punch members of the pipe body manufacturing apparatus shown in FIG.
FIG. 16 is an explanatory diagram for explaining the opening of the seam of the secondary intermediate molded product based on the springback force generated in the pair of side wall portions, (A) shows the pipe body in a state where the seam is in close contact; (B) is explanatory drawing which shows the state which the seam opened virtually based on the springback force f2 which is going to open the seam applied to the bottom wall part, (C) is the joint added to the bottom wall part It is explanatory drawing of the closing amount of the joint by spring back force r2 which is going to close eyes.
17 is a view showing a modification of the pipe body manufacturing apparatus shown in FIG.
18A and 18B are explanatory diagrams for explaining other shapes of the pipe body according to the present invention, in which (A) shows a triangular pipe body, (B) shows a pentagonal pipe body, C) shows a hexagonal pipe body.
FIG. 19 is an explanatory view for explaining a modified example of the pipe body according to the present invention, in which (a) shows a plan view of a metal plate used in the modified example, and (b) shows the metal plate. The state which engaged parts were engaged is shown, (c) is a perspective view which shows the external appearance shape of the pipe body of the modification.
FIG. 20 shows an example in which the pipe body according to the present invention is used as a supporting means of a copying machine, in which (A) is a perspective view of the supporting means, and (B) is a side view of the supporting means.
[Explanation of symbols]
1 Pipe body
2, 3, 4 Constituent walls
5a, 5b seam-constituting wall
5e seam
6 Metal plate
14 Intermediate molded products
15 One component wall
15a bent part
15b Flat part
16 Adjacent wall
22 Fixed type
24 fixed plate
27 Pressure punch member
31 Bent part

Claims

矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、該加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態を維持する静止摩擦力を有する材料からなりかつ前記合わせ目構成壁部の屈曲部に接触して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する摩擦接触部材が設けられていることを特徴とするパイプ体の製造装置。A rectangular metal plate is used as a raw material to form a square pipe body having a plurality of constituent walls and a seam, and the seam is in close contact with the spring back force.
One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set, the processing apparatus main body having a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pair of adjacent structures on the pressure punch member The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the flat portion, and the flatness of the one wall portion is maintained after the flat portion is brought into contact with the fixed plate. Made of a material having a static frictional force that maintains the abutting state of the one constituent wall portion against the fixed plate against the reaction force caused by the contact, and in contact with the bent portion of the joint constituent wall portion An apparatus for manufacturing a pipe body, comprising: a friction contact member that suppresses the rise of the intermediate molded product due to pressurization of the pair of adjacent constituent wall portions.

矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、前記加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態が維持されるように、前記合わせ目構成壁部の屈曲部に係合して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する係合突起が設けられていることを特徴とするパイプ体の製造装置。A rectangular metal plate is used as a raw material to form a square pipe body having a plurality of constituent walls and a seam, and the seam is in close contact with the spring back force.
One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set. The processing apparatus main body has a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pressure punch member has the pair of adjacent structures. The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the wall portion and the flatness of the one wall portion after the flat portion comes into contact with the fixed plate. The pair of paired walls are engaged with the bent portion of the seam-constituting wall so that the contact state of the one-constituting wall with the fixed plate is maintained against the reaction force generated by the maintaining. An apparatus for manufacturing a pipe body, characterized in that an engagement protrusion is provided to suppress the rise of the intermediate molded product due to pressurization of adjacent constituent wall portions.

請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体の閉断面の形状が矩形であり、前記パイプ体の各構成壁部は前記矩形の各辺を構成しかつ前記中間成形品の一構成壁部に対応する底壁部と前記中間成形品の一対の隣接構成壁部に対応する一対の側壁部と前記中間成形品の合わせ目構成壁部に対応する上壁部とからなることを特徴とするパイプ体の製造装置。3. The pipe body manufacturing apparatus according to claim 1, wherein a closed cross-sectional shape of the pipe body is a rectangle, and each constituent wall portion of the pipe body constitutes each side of the rectangle and the intermediate A bottom wall portion corresponding to one constituent wall portion of the molded product, a pair of side wall portions corresponding to a pair of adjacent constituent wall portions of the intermediate molded product, and an upper wall portion corresponding to a seam constituting wall portion of the intermediate molded product; An apparatus for manufacturing a pipe body, comprising:

請求項１又は請求項２に記載のパイプ体の製造装置において、前記加工装置本体は前記固定型に対向して可動される可動型を有し、前記可動型には可動プレートと該可動プレートに設けられて前記一対の加圧パンチ部材を互いに接近させる方向に可動させる駆動部材とが設けられていることを特徴とするパイプ体の製造装置。 3. The pipe body manufacturing apparatus according to claim 1, wherein the processing apparatus main body has a movable mold movable to face the fixed mold, and the movable mold includes a movable plate and a movable plate. An apparatus for manufacturing a pipe body, comprising: a drive member provided and movable in a direction in which the pair of pressure punch members are moved closer to each other.

請求項４に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材は前記一構成壁部が前記固定プレートに当接した状態で加圧力を維持しつつ可動が停止されることを特徴とするパイプ体の製造装置。5. The pipe body manufacturing apparatus according to claim 4, wherein the pair of pressure punch members is stopped from moving while maintaining a pressing force in a state where the one constituent wall portion is in contact with the fixed plate. Pipe body manufacturing equipment .

請求項４に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材は係合テーパ部を有して互いに離間する方向に付勢され、前記駆動部材は前記係合テーパ部と係合する係合テーパ部を有し、前記一対の加圧パンチ部材はその係合テーパ部と前記駆動部材のテーパ部とによって互いに接近する方向に可動されることを特徴とするパイプ体の製造装置。5. The pipe body manufacturing apparatus according to claim 4, wherein the pair of pressure punch members have an engagement taper portion and are biased in a direction away from each other, and the drive member engages with the engagement taper portion. An apparatus for manufacturing a pipe body , wherein the pair of pressure punch members are movable in directions approaching each other by the engagement taper portion and the taper portion of the drive member.

請求項１又は請求項２に記載のパイプ体の製造装置において、前記合わせ目が前記合わせ目構成壁部の中央に位置していることを特徴とするパイプ体の製造装置。In the manufacturing apparatus of the pipe body according to claim 1 or claim 2, pipe manufacturing apparatus, characterized in that the seam is positioned in the center of the seam structure wall.

請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体はその閉断面の形状が三角形又は五角形又は六角形であることを特徴とするパイプ体の製造装置。In the manufacturing apparatus of the pipe body according to claim 1 or claim 2, wherein the pipe body manufacturing apparatus of the pipe, wherein the shape of the closed cross section is triangular or pentagonal or hexagonal.

請求項１又は請求項２に記載のパイプ体の製造装置において、前記パイプ体の加工は、前記金属プレートを折り曲げたときの延び量を見越して行われることを特徴とするパイプ体の製造装置。In the manufacturing apparatus of the pipe body according to claim 1 or claim 2, wherein the machining of the pipe body manufacturing apparatus of the pipe, characterized in that it is performed in anticipation of the extending amount when bending the metal plate.

請求項１又は請求項２に記載のパイプ体の製造装置において、前記一対の加圧パンチ部材を離反・接近させるために上下動される加圧パンチ部材が設けられていることを特徴とするパイプ体の製造装置。 The pipe body manufacturing apparatus according to claim 1 or 2, wherein a pressure punch member that is moved up and down to separate and approach the pair of pressure punch members is provided. Body manufacturing equipment.

矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、A rectangular metal plate is used as a raw material to form a square pipe body having a plurality of constituent walls and a seam, and the seam is in close contact with the spring back force.
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、該加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態を維持する静止摩擦力を有する材料からなりかつ前記合わせ目構成壁部の屈曲部に接触して前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する摩擦接触部材が設けられていることを特徴とするパイプ体の製造装置を用いたパイプ体の製造方法。 One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set, the processing apparatus main body having a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pair of adjacent structures on the pressure punch member The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the flat portion, and the flatness of the one wall portion is maintained after the flat portion is brought into contact with the fixed plate. Made of a material having a static frictional force that maintains the abutting state of the one constituent wall portion against the fixed plate against the reaction force caused by the contact, and in contact with the bent portion of the joint constituent wall portion A method of manufacturing a pipe body using a pipe body manufacturing apparatus, comprising: a friction contact member that suppresses the rise of the intermediate molded product due to pressurization of the pair of adjacent constituent wall portions.

矩形状の金属プレートを素材として複数個の構成壁部と合わせ目とを有しかつ該合わせ目がスプリングバック力に基づき密着された閉断面が角形状のパイプ体を形成するために使用され、A rectangular metal plate is used as a raw material to form a square pipe body having a plurality of constituent walls and a seam, and the seam is in close contact with the spring back force.
前記金属プレートの複数箇所をその辺に沿う方向に沿って折り曲げることによって前記合わせ目が属する合わせ目構成壁部と平坦部の両側に一対の屈曲部が形成された一構成壁部と該一構成壁部に隣接する一対の隣接構成壁部とを有しかつ前記合わせ目が非密着状態でしかも前記隣接構成壁部と前記屈曲部との成す角度が前記パイプ体を完成させたときの角度よりも大きな中間成形品がセットされる加工装置本体を有し、前記加工装置本体は固定型を有し、該固定型は前記一対の屈曲部が当接して前記平坦部との間に隙間を開けて前記中間成形品が載置される固定プレートと、該固定プレートに摺動可能に設置されて前記一対の隣接構成壁部を互いに接近する方向に加圧する加圧パンチ部材とを備え、該加圧パンチ部材には前記一対の隣接構成壁部の加圧に基づく前記平坦部の前記固定プレートへの当接方向への変形の際に生じる反力と該固定プレートへの前記平坦部の当接後に前記一構成壁部の平坦性を維持させることによって生じる反力とに抗して前記一構成壁部の前記固定プレートへの当接状態が維持されるように、前記合わせ目構成壁部の屈曲部に係合して One configuration wall portion in which a plurality of portions of the metal plate are bent along a direction along a side thereof, a seam configuration wall portion to which the seam belongs and a pair of bent portions formed on both sides of the flat portion, and the configuration A pair of adjacent constituent wall portions adjacent to the wall portion, the seam is in a non-contact state, and an angle formed between the adjacent constituent wall portion and the bent portion is an angle when the pipe body is completed. A processing apparatus main body on which a larger intermediate molded product is set. The processing apparatus main body has a fixed mold, and the fixed mold is in contact with the pair of bent portions to form a gap between the flat section. A fixed plate on which the intermediate molded product is placed, and a pressure punch member that is slidably installed on the fixed plate and presses the pair of adjacent constituent wall portions in a direction approaching each other. The pressure punch member has the pair of adjacent structures. The reaction force generated when the flat portion is deformed in the direction of contact with the fixed plate due to the pressurization of the wall portion and the flatness of the one wall portion after the flat portion comes into contact with the fixed plate. Engage with the bent portion of the seam-constituting wall portion so that the contact state of the one-constituent wall portion with the fixed plate is maintained against the reaction force generated by the maintenance. 前記一対の隣接構成壁部の加圧による前記中間成形品の上昇を抑制する係合突起が設けられていることを特徴とするパイプ体の製造装置を用いたパイプ体の製造方法。A pipe body manufacturing method using a pipe body manufacturing apparatus, wherein an engagement protrusion is provided to suppress the rise of the intermediate molded product due to pressurization of the pair of adjacent constituent wall portions.

請求項１１又は請求項１２に記載のパイプ体の製造装方法において、前記パイプ体の閉断面の形状が矩形であり、前記パイプ体の各構成壁部は前記矩形の各辺を構成しかつ前記中間成形品の一構成壁部に対応する底壁部と前記中間成形品の一対の隣接構成壁部に対応する一対の側壁部と前記中間成形品の合わせ目構成壁部に対応する上壁部とからなることを特徴とするパイプ体の製造方法。 The pipe body manufacturing and mounting method according to claim 11 or 12, wherein a shape of a closed cross section of the pipe body is a rectangle, and each constituent wall portion of the pipe body constitutes each side of the rectangle, and A bottom wall portion corresponding to one constituent wall portion of the intermediate molded product, a pair of side wall portions corresponding to a pair of adjacent constituent wall portions of the intermediate molded product, and an upper wall portion corresponding to a seam constituting wall portion of the intermediate molded product A method of manufacturing a pipe body, comprising:

請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記加工装置本体は前記固定型に対向して可動される可動型を有し、前記可動型には可動プレートと該可動プレートに設けられて前記一対の加圧パンチ部材を互いに接近させる方向に可動させる駆動部材とが設けられていることを特徴とするパイプ体の製造装置を用いたパイプ体の製造方法。13. The pipe body manufacturing method according to claim 11 or 12, wherein the processing apparatus main body has a movable mold that is movable facing the fixed mold, and the movable mold includes a movable plate and a movable plate. A pipe body manufacturing method using a pipe body manufacturing apparatus, comprising: a driving member which is provided and movable in a direction in which the pair of pressure punch members are moved closer to each other.

請求項１４に記載のパイプ体の製造方法において、前記一対の加圧パンチ部材は前記一構成壁部が前記固定プレートに当接した状態で加圧力を維持しつつ可動が停止されることを特徴とするパイプ体の製造装置を用いたパイプ体の製造方法。 15. The method of manufacturing a pipe body according to claim 14, wherein the pair of pressure punch members are stopped from moving while maintaining a pressing force in a state where the one constituent wall portion is in contact with the fixed plate. A pipe body manufacturing method using the pipe body manufacturing apparatus .

請求項１４に記載のパイプ体の製造方法において、前記一対の加圧パンチ部材は係合テーパ部を有して互いに離間する方向に付勢され、前記駆動部材は前記係合テーパ部と係合する係合テーパ部を有し、前記一対の加圧パンチ部材はその係合テーパ部と前記駆動部材のテーパ部とによって互いに接近する方向に可動されることを特徴とするパイプ体の製造装置を用いたパイプ体の製造方法。 15. The method of manufacturing a pipe body according to claim 14, wherein the pair of pressure punch members have an engagement taper portion and are biased in a direction away from each other, and the drive member is engaged with the engagement taper portion. An apparatus for manufacturing a pipe body, wherein the pair of pressure punch members are movable in directions approaching each other by the engagement taper portion and the taper portion of the drive member. The manufacturing method of the pipe body used .

請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記合わせ目が前記合わせ目構成壁部の中央に位置していることを特徴とするパイプ体の製造方法。The method for manufacturing a pipe body according to claim 11 or 12, wherein the seam is located at a center of the seam constituting wall portion.

請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記パイプ体はその閉断面の形状が三角形又は五角形又は六角形であることを特徴とするパイプ体の製造方法。 13. The method of manufacturing a pipe body according to claim 11 or 12, wherein the pipe body has a closed cross-sectional shape of a triangle, pentagon, or hexagon .

請求項１１又は請求項１２に記載のパイプ体の製造方法において、前記パイプ体の加工は、前記金属プレートを折り曲げたときの延び量を見越して行われることを特徴とするパイプ体の製造方法。 13. The method of manufacturing a pipe body according to claim 11, wherein the processing of the pipe body is performed in anticipation of an extension amount when the metal plate is bent .