JP2005007406A - Tubular body - Google Patents

Tubular body Download PDF

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Publication number
JP2005007406A
JP2005007406A JP2003171791A JP2003171791A JP2005007406A JP 2005007406 A JP2005007406 A JP 2005007406A JP 2003171791 A JP2003171791 A JP 2003171791A JP 2003171791 A JP2003171791 A JP 2003171791A JP 2005007406 A JP2005007406 A JP 2005007406A
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JP
Japan
Prior art keywords
pipe body
peripheral wall
end edge
engagement portion
body according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP2003171791A
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Japanese (ja)
Inventor
Takashi Kondo
崇史 近藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2003171791A priority Critical patent/JP2005007406A/en
Publication of JP2005007406A publication Critical patent/JP2005007406A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To prevent joined end/edge parts of a tubular body from being easily separated not only in the peripheral direction of peripheral walls but also in the inner direction and the outer direction of the peripheral walls. <P>SOLUTION: First engagement parts 20 to be locked in the peripheral direction of peripheral walls 13 and second engagement parts 30 to be locked in the inner direction and the outer direction of the peripheral walls 13 are formed on end/edge parts of a tubular body 10'. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、一対の端縁部同士を周方向に突き合わせて形成されたパイプ体に関し、詳細には、これらの端縁部に形成された係合部の改良に関するものである。
【0002】
【従来の技術】
従来より、金属プレートを環状に曲げ加工し、一対の端縁同士を周方向に突き合わせることによって、断面環状の周壁を有する中空のパイプ体を製造することが行われている。
【0003】
そして、このようなパイプ体には、突き合わされる両端縁部に、互いに係合する係合部が形成されて、端縁部同士が突き合わされた状態において、この係合部が係合することにより、両端縁部の突合わせ状態を維持した接合状態を得ている。
【0004】
すなわち、例えば図7(a)に示す略矩形平板状の金属パネル10を、互いに平行な仮想折曲線L1,L2,L3で折り曲げて、同図(b)に示すように、これら仮想折曲線L1,L2,L3に平行な一対の端縁部11と端縁部12とが突き合わされて形成された断面四角環状の角パイプ体10′においては、端縁部11に形成された雌型係合部21および端縁部12に形成された雄型係合部22からなる係合部20が係合される。
【0005】
ここで、詳しくは図2(a)に示すように、雌型係合部21は、一方の端縁部11から凹状に切り欠かれて形成され、雄型係合部22は、他方の端縁部12から突出して形成されている。
【0006】
そして、雌型係合部21は、端縁部11に連なる開口Kの両縁部にそれぞれ、雌型係合部21を括れ形状に形成する舌片21a,21bが形成されているとともに、開口Kに対向する雌型係合部21の切欠きの底部から開口Kに向かって突設され、開口Kから挿入された雄型係合部22に当接して該雄型係合部を変形させる楔状の突起21cが形成されている。
【0007】
一方、雄型係合部22は、この楔状の突起21cが、その間隔を広げて拡開変形する二つの突起片22a,22bを備え、これら二つの突起片22a,22bの全体の幅Nは、開口Kの幅Mよりも僅かに狭く設定されている(N<M)。
【0008】
したがって、両端縁部11,12同士が矢印P方向に近接しても、図2(b)に示すように、雄型係合部22の両突起片22a,22bは、開口Kから雌型係合部21に抵抗無く進入する。
【0009】
また、二つの突起片22a,22bは、先端部に向かって先細りとなるように、両突起片22a,22bの対向する壁面に、傾斜した傾斜面22c,22dが形成されている。
【0010】
そして、両端縁部11,12同士の近接が進んで、両突起片22a,22bの傾斜面22c,22dが楔状の突起21cの斜面に当接すると、各突起片22a,22bの傾斜面22c,22dは、楔状の突起21cの斜面に沿って滑り、これによって、突起片22a,22bは、両者の間隔が広くなる方向に拡開変形し、拡開した状態での二つの突起片22a,22bの最大幅N′が、開口Kの幅Mよりも広くなって(N′>M)、両係合部21,22は係止され、両端縁部11,12は接合された状態で保持されて、角パイプ体10′としての形状が維持されている(特許文献1)。
【0011】
【特許文献1】
特開2001−286934号公報
【0012】
【発明が解決しようとする課題】
ところで、上述した係合部は、周壁の面内において係合部が変形することによって、端縁部同士を周壁の周方向について係止するものであるため、両端縁部をこの周方向に引き離す方向への荷重に対する剛性は高い。
【0013】
しかし、周壁の内外方向(周壁の厚さ方向についての剪断方向)に作用する荷重に対しては、係合部の厚さ方向の端面間での摩擦力のみが抗力となるに過ぎず、両端面の接触面積が非常に小さいことから、周壁の周方向に作用する荷重に対する剛性に比べて十分な剛性を有しているとはいえない。
【0014】
すなわち、例えば図8に示すように、接合部の近傍の周壁13の部分に、他の部品を固定するためのブラケット14が接合されており、このブラケット14に対して、周壁13の外側方向(パイプ体10′の軸Cから遠ざかる方向)すなわち図示上方向に引き上げる荷重が負荷すると、係合部20の係止状態は比較的容易に外れて、両端縁部11,12は周壁13の内外方向に離隔し、パイプ体10′の体を為さなくなる。
【0015】
本発明は上記事情に鑑みなされたものであり、接合された端縁部同士が、周壁の周方向だけでなく、周壁の内側方向および外側方向についても、容易に離れるのを阻止することができるパイプ体を提供することを目的とする。
【0016】
【課題を解決するための手段】
上記課題を解決するため、本発明に係るパイプ体は、展開状態における一対の端縁部同士を突き合わせて接合されたパイプ体において、パイプ体の周壁の周方向について係止する第一係合部と、周壁の内側方向および外側方向について係止する第二係合部とを備えることによって、接合された端縁部同士が、周方向にも内外方向にも離れないようにしたものである。
【0017】
すなわち、本発明の請求項1に係るパイプ体は、一対の端縁部同士を周方向に突き合わせた状態において前記各端縁部に形成された係合部が互いに係合することにより、前記端縁部同士が接合状態を維持した断面環状の周壁を形成してなるパイプ体であって、前記係合部は、前記端縁部同士を、前記周壁の周方向について係止する第一係合部と、前記周壁の内側方向および外側方向について係止する第二係合部とを有することを特徴とする。
【0018】
このように構成された本発明の請求項1に係るパイプ体によれば、第一係合部が端縁部同士を周壁の周方向について係止することにより、端縁部同士が周壁の周方向に離隔するのを阻止するとともに、第二係合部が端縁部同士を周壁の内側方向および外側方向について係止するため、端縁部同士が周壁の内外方向に離隔するのを阻止する。
【0019】
したがって、互いに接合された両端縁部の少なくとも一方に、周壁の面内方向やこの周壁に直交する方向(周壁の内側方向、外側方向)に沿った外力が作用した場合であっても、接合された端縁部同士が離れることがなく、パイプ体としての剛性を維持することができる。
【0020】
また、本発明の請求項2に係るパイプ体は、請求項1に係るパイプ体において、前記第一係合部は、一方の端縁部から凹状に切り欠かれた雌型係合部と、他方の端縁部から突出して形成され、前記雌型係合部に係合する雄型係合部とからなり、前記雌型係合部の前記端縁部に連なる開口の両縁部にそれぞれ、前記雌型係合部を括れ形状に形成する舌片が形成されていることを特徴とする。
【0021】
このように構成された本発明の請求項2に係るパイプ体によれば、雄型係合部が雌型係合部に係合し、雄型係合部が変形されたときに、雌型係合部の括れ形状を形成する舌片に引っ掛かりやすく、両者を容易に係止状態とすることができる。
【0022】
また、本発明の請求項3に係るパイプ体は、請求項2に係るパイプ体において、前記舌片の先端は、前記開口の外側に向かうにしたがって、該両舌片の先端の間隔が広くなるように形成されていることを特徴とする。
【0023】
このように構成された本発明の請求項3に係るパイプ体によれば、端縁部同士を周方向に突き合わせて、雄型係合部を雌型係合部に係合させる際に、雄型係合部の先端は、両舌片の開口外側から進入するが、この両舌片の先端の間隔が、開口外側では広く設定されているため、雄型係合部の挿入を行い易い。
【0024】
また、本発明の請求項4に係るパイプ体は、請求項2または3に係るパイプ体において、前記雌型係合部の前記舌片は少なくとも一部が前記端縁部よりも外方に突出して形成され、前記雄型係合部が形成された側の端縁部の対応部分は、前記舌片の前記端縁部からの突出に対応して陥凹していることを特徴とする。
【0025】
このように構成された本発明の請求項4に係るパイプ体によれば、雌型係合部が形成された側の端縁部からは舌片の一部が外方に突出し、雄型係合部が形成された側の端縁部は、この突出した部分に対応して陥凹しているため、突出した部分と陥凹した部分とが嵌め合わせとなり、接合された両端縁部の延在方向に沿った方向に両端縁部が位置ずれするのを防止することができる。
【0026】
また、本発明の請求項5に係るパイプ体は、請求項4に係るパイプ体において、前記舌片のうち前記端縁部から突出した部分の肩部が、面取り状に傾斜して形成されていることを特徴とする。
【0027】
このように構成された本発明の請求項5に係るパイプ体によれば、舌片の外方に突出した一部の肩部が、面取り状に傾斜しているため、この突出した部分が雄型係合部の陥凹した部分に嵌め合わされる際に、陥凹した部分の角部が傾斜している面に沿って案内され、両者の嵌め合わせを容易に行うことができる。
【0028】
また、本発明の請求項6に係るパイプ体は、請求項4に係るパイプ体において、前記舌片のうち前記端縁部から突出した部分の肩部が、面取り状に傾斜して形成され、かつ前記雄型係合部の前記陥凹した部分のうち前記端縁部に連なる開口の両縁部にそれぞれ、前記肩部に形成された傾斜と当接する傾斜案内部が形成されていることを特徴とする。
【0029】
このように構成された本発明の請求項6に係るパイプ体によれば、舌片の外方に突出した一部の肩部が面取り状に傾斜し、かつ雄型係合部の陥凹した部分の開口両縁部も傾斜しているため、舌片の突出した部分が雄型係合部の陥凹した部分に嵌め合わされる際に、両者の傾斜面同士が違いに案内面となって案内され、両者の嵌め合わせを容易に行うことができる。
【0030】
また、本発明の請求項7に係るパイプ体は、請求項2から6のうちいずれか1項に係るパイプ体において、前記雌型係合部のうち前記開口に対向する切欠きの底部から該開口に向かって突設され、該開口から挿入された前記雄型係合部に当接して該雄型係合部を変形させる突起が形成されていることを特徴とする。
【0031】
このように構成された本発明の請求項7に係るパイプ体によれば、一対の端縁部同士が周方向に突き合わされて、雄型係合部と雌型係合部とが係合される過程において、雄型係合部が雌型係合部の突起に当接しながら、雌型当接部の凹状の切欠きの内部で変形し、この結果、両係合部が係止され、両端縁部同士が周壁の周方向について係止される。
【0032】
そして、この係止は、端縁部同士を突き合わせる過程と同時進行するため、端縁部同士を突き合わせる過程の後に、別途、雌雄両係合部を変形させて係止させる過程による必要がなく、簡易な製造工程で製造することが可能となる。
【0033】
また、本発明の請求項8に係るパイプ体は、請求項7に係るパイプ体において、前記雄型係合部は、前記変形によって間隔が広がるように拡開する二つの突起片を備え、前記雌型係合部の前記突起の先端は、前記二つの突起片の間に嵌入するように楔状に形成されていることを特徴とする。
【0034】
このように構成された本発明の請求項8に係るパイプ体によれば、一対の端縁部同士が周方向に突き合わされて、雄型係合部と雌型係合部とが係合される過程において、雄型係合部の二つの突起片の間に、相対的に、雌型係合部の楔状の突起が割り込むため、雄型係合部の進入に伴って二つの突起片の変形が進み、両係合部を容易に係止することができる。
【0035】
また、本発明の請求項9に係るパイプ体は、請求項8に係るパイプ体において、前記二つの突起片は、先端部に向かって先細りとなるように、少なくとも該両突起片が対向する壁面が傾斜して形成されていることを特徴とする。
【0036】
このように構成された本発明の請求項9に係るパイプ体によれば、二つの突起片の間に、雌型係合部の楔状の突起が割り込む際に、この二つの突起片の対向壁が傾斜して形成されているため、楔状の突起の斜面との接触面積が増大し、両者間での摩擦力が軽減され、二つの突起片の変形を円滑化することができる。
【0037】
また、本発明の請求項10に係るパイプ体は、請求項1から9のうちいずれか1項に係るパイプ体において、前記第二係合部は、前記一方の端縁部から延びて、前記他方の端縁部の周壁内面側に接する内面支持係合部と、前記他方の端縁部から延びて、前記一方の端縁部の周壁外面側に接する外面支持係合部とからなり、前記内面支持係合部および前記外面支持係合部がそれぞれ対向する相手側の端縁部が、該端縁部よりも後退して形成されていることを特徴とする。
【0038】
このように構成された本発明の請求項10に係るパイプ体によれば、内面支持係合部は対向する端縁部の周壁内面側に潜り込んで、この内面側に接することにより、この周壁部分を内面側から支持する。したがって、内面側から支持された端縁部側の周壁が、内面支持係合部が形成された端縁部側の周壁に対して、周壁の内側に位置ずれするのが阻止される。
【0039】
一方、外面支持係合部は対向する端縁部の周壁外面側に乗り上げて、この外面側に接することにより、この周壁部分を外面側から支持する。したがって、外面側から支持された端縁部側の周壁が、外面支持係合部が形成された端縁部側の周壁に対して、周壁の外側に位置ずれするのが阻止される。
【0040】
しかも、内面支持係合部および外面支持係合部がそれぞれ対向する相手側の端縁部は、本来の端縁部よりも後退して形成されているため、内面支持係合部が周壁の内面側に完全に潜り込むのに至るまでの撓み始点部近傍と相手側端縁部との干渉、および外面支持係合部が周壁の外面側に完全に乗り上げるのに至るまでの撓み始点部近傍と相手側端縁部との干渉をそれぞれ防止することができ、第二係合部が形成されている部分以外の端縁部同士の接合部に隙間が生じるのを防止することができる。
【0041】
また、本発明の請求項11に係るパイプ体は、請求項10に係るパイプ体において、前記内面支持係合部の先端部の周壁外面側および/または該内面支持係合部が接する相手側端縁部の周壁内面側が、その厚さ方向について先細りとなるように、傾斜して形成されていることを特徴とする。
【0042】
このように構成された本発明の請求項11に係るパイプ体によれば、内面支持係合部を相手側端縁部の周壁内面側に潜り込ませる際、内面支持係合部の先端部およびその相手側端縁部のうち少なくとも一方が、その厚さ方向について先細りとなるように傾斜して形成されているため、潜り込ませようとする面側に誘導し易くすることができる。
【0043】
また、本発明の請求項12に係るパイプ体は、請求項10または11に係るパイプ体において、前記外面支持係合部の先端部の周壁内面側および/または該外面支持係合部が接する相手側端縁部の周壁外面側が、その厚さ方向について先細りとなるように、傾斜して形成されていることを特徴とする。
【0044】
このように構成された本発明の請求項12に係るパイプ体によれば、外面支持係合部を相手側端縁部の周壁外面側に乗り上げさせる際、外面支持係合部の先端部およびその相手側端縁部のうち少なくとも一方が、その厚さ方向について先細りとなるように傾斜して形成されているため、乗り上げさせようとする面側に誘導し易くすることができる。
【0045】
また、本発明の請求項13に係るパイプ体は、請求項10から12のうちいずれか1項に係るパイプ体において、前記内面支持係合部の先端部が、該内面支持係合部が接する相手側端縁部の周壁内面側に傾斜して形成されていることを特徴とする。
【0046】
このように構成された本発明の請求項13に係るパイプ体によれば、内面支持係合部を相手側端縁部の周壁内面側に潜り込ませる際、内面支持係合部の先端部が、相手側端縁部の周壁内面側に傾斜して形成されているため、潜り込ませようとする面側に誘導し易くすることができる。
【0047】
また、本発明の請求項14に係るパイプ体は、請求項10から13のうちいずれか1項に係るパイプ体において、前記外面支持係合部の先端部が、該外面支持係合部が接する相手側端縁部の周壁外面側に傾斜して形成されていることを特徴とする。
【0048】
このように構成された本発明の請求項14に係るパイプ体によれば、外面支持係合部を相手側端縁部の周壁外面側に乗り上げさせる際、外面支持係合部の先端部が、相手側端縁部の周壁外面側に傾斜して形成されているため、乗り上げさせようとする面側に誘導し易くすることができる。
【0049】
【発明の実施の形態】
以下、本発明に係るパイプ体の具体的な実施の形態について、図面を参照して説明する。
(実施形態1)
図1(a)は、本発明の実施形態(実施形態1)に係るパイプ体10′を単一平板状に展開した金属パネル10を示す展開図、同図(b)は、実施形態1に係るパイプ体10′を示す斜視図である。
【0050】
図示のパイプ体10′は、断面四角環状の角パイプ体であり、略矩形平板状の金属パネル10を、互いに平行な仮想折曲線L1,L2,L3で折り曲げて形成され、これら仮想折曲線L1,L2,L3に平行な一対の端縁部11と端縁部12とが突き合わされ、端縁部11に形成された第一係合部20と第二係合部30とが各別に係合することによってパイプ体10′を為している。
【0051】
ここで、第一係合部20は、一方の端縁部11に形成された雌型係合部21および他方の端縁部12に形成された雄型係合部22からなり、これら端縁部11,12同士を、周壁13の周方向について係止する。
【0052】
一方、第二係合部30は、一方の端縁部11から延びて、他方の端縁部12の周壁内面側に接する内面支持舌片(内面支持係合部)31およびこの他方の端縁部12の周壁部分(以下、内面当接部という。)32と、他方の端縁部12から延びて、一方の端縁部11の周壁外面側に接する外面支持舌片(外面支持係合部)34およびこの一方の端縁部11の周壁部分(以下、外面当接部という。)33とからなり、これら端縁部11,12同士を、周壁13の内外方向(周壁の厚さ方向についての剪断方向)について係止する。
【0053】
さらに詳しくは、図2(a)に示すように、第一係合部20の雌型係合部21は、一方の端縁部11から凹状に切り欠かれて形成され、雄型係合部22は、他方の端縁部12から突出して形成されている。
【0054】
そして、雌型係合部21は、端縁部11に連なる開口Kの両縁部にそれぞれ、雌型係合部21を括れ形状に形成する舌片21a,21bが形成されているとともに、開口Kに対向する雌型係合部21の切欠きの底部から開口Kに向かって突設され、開口Kから挿入された雄型係合部22に当接して該雄型係合部を変形させる楔状の突起21cが形成されている。
【0055】
一方、雄型係合部22は、この楔状の突起21cが、その間隔を広げて拡開変形する二つの突起片22a,22bを備え、これら二つの突起片22a,22bの全体の幅Nは、開口Kの幅Mよりも僅かに狭く設定されている(N<M)。
【0056】
したがって、両端縁部11,12同士が矢印P方向に近接しても、図2(b)に示すように、雄型係合部22の両突起片22a,22bは、開口Kから雌型係合部21に抵抗無く進入する。
【0057】
また、二つの突起片22a,22bは、先端部に向かって先細りとなるように、両突起片22a,22bの対向する壁面に、傾斜した傾斜面22c,22dが形成されている。
【0058】
そして、両端縁部11,12同士の近接が進んで、両突起片22a,22bの傾斜面22c,22dが楔状の突起21cの斜面に当接すると、各突起片22a,22bの傾斜面22c,22dは、楔状の突起21cの斜面に沿って滑り、これによって、突起片22a,22bは、両者の間隔が広くなる方向に拡開変形し、拡開した状態での二つの突起片22a,22bの最大幅N′が、開口Kの幅Mよりも広くなって(N′>M)、両係合部21,22は係止される。
【0059】
また、図3(a)に示すように、第二係合部30の内面支持舌片31と外面当接部33とは隣接して並設されており、また、外面支持舌片34と内面当接部32とは隣接して並設されている。
【0060】
そして、内面支持舌片31および外面当接部33は、端縁部11よりも後退した位置に形成され、同様に、外面支持舌片34および内面当接部32も、端縁部12よりも後退した位置に形成されている。したがって、内面支持舌片31および外面当接部33が形成されている部分は、端縁部11を基準とした凹部35を構成し、外面支持舌片34および内面当接部32が形成されている部分は、端縁部12を基準とした凹部36を構成している。
【0061】
また、内面支持舌片31の先端部は、その板厚方向について先細りとなるように、その周壁外面側が傾斜した案内面31aを有し、内面当接部32は、その板厚方向について先細りとなるように、その周壁内面側が傾斜した案内面32aを有している。
【0062】
これと同様に、外面支持舌片34の先端部は、その板厚方向について先細りとなるように、その周壁内面側が傾斜した案内面34aを有し、外面当接部33は、その板厚方向について先細りとなるように、その周壁外面側が傾斜した案内面33aを有している。
【0063】
さらに、内面支持舌片31は、内面当接部32側に角度α(図3(b)参照)だけ傾斜して形成され、外面支持舌片34も、外面当接部33側に角度α(図3(c)参照)だけ傾斜して形成されている。
【0064】
次に、本実施形態のパイプ体10′の作用について説明する。
【0065】
ここで、パイプ体10′は、前述したように展開状態において略矩形平板状の金属パネル10を、仮想折曲線L1,L2,L3で折り曲げて形成されたものであるが、端縁部11と端縁部12とが突き合わされるに際して、端縁部11に形成された第一係合部20と第二係合部30とが各別に係合される。
【0066】
まず、第一係合部20の係合作用については、既述したように、両端縁部11,12同士が矢印P方向に近接し、図2(b)に示すように雄型係合部22の両突起片22a,22bが、開口Kから雌型係合部21に進入する。
【0067】
そして、二つの突起片22a,22bの先端に形成された傾斜面22c,22dが楔状の突起21cの斜面に当接すると、各突起片22a,22bの傾斜面22c,22dが、楔状の突起21cの斜面に沿って滑り、突起片22a,22bの間隔が広くなる方向に拡開変形し、雌型係合部21と雄型係合部22とが係止され、両端縁部11,12を周壁13の周方向に離隔させるように作用する外力に対して、十分な剛性を有するものとなる。
【0068】
一方、両端縁部11,12が矢印P方向に近接し始めると、図3に示すように、第二係合部30の内面支持舌片31の先端は内面当接部32に近付き、外面支持舌片34の先端は外面当接部33に近付く。
【0069】
さらにこの近接が進むと、図4(b)に示すように、内面支持舌片31の先端に形成された案内面31aと内面当接部32に形成された案内面32aとが当接し、図4(c)に示すように、外面支持舌片34の先端に形成された案内面34aと外面当接部33に形成された案内面33aとが当接する。
【0070】
このとき、内面支持舌片31自体が、内面当接部32側に角度αだけ傾斜して形成されているため、内面支持舌片31の先端は、内面当接部32側(周壁13の下方D)に潜り込み易く、しかも、内面支持舌片31の案内面31aは周壁13の外面側に形成され、内面当接部32の案内面32aは周壁13の内面側に形成されているため、この構成からも、内面支持舌片31の先端は、内面当接部32側に潜り込み易くなっている。
【0071】
これと同様に、外面支持舌片34自体が、外面当接部33側に角度αだけ傾斜して形成されているため、外面支持舌片34の先端は、外面当接部33側(周壁13の上方U)に乗り上げ易く、しかも、外面支持舌片34の案内面34aは周壁13の内面側に形成され、外面当接部33の案内面33aは周壁13の外面側に形成されているため、この構成からも、外面支持舌片34の先端は、外面当接部33側に乗り上げ易くなっている。
【0072】
そして、最終的に両端面部11,12が、図5に示すように突き合わされるまでの間に、内面支持舌片31は内面当接部32に潜り込みつつ、同図(b)に示すように、その傾斜角度が大きくなる方向すなわち下方Dに変形し、この変形に伴う反対方向への復原力によって、内面当接部32を下方D側から支持する。
【0073】
同様に、外面支持舌片34は外面当接部33に乗り上げつつ、同図(c)に示すように、その傾斜角度が大きくなる方向すなわち上方Uに変形し、この変形に伴う反対方向への復原力によって、外面当接部33を上方U側から支持する。
【0074】
したがって、両端縁部11,12を周壁13の内外方向すなわち図示においては上下方向に離隔させるように作用する外力に対して、十分な剛性を有するものとなる。
【0075】
このように、本実施形態に係るパイプ体10′によれば、接合された端縁部11,12同士が、周壁13の周方向だけでなく、周壁13の内側方向および外側方向についても、容易に離れるのを阻止することができる。
【0076】
なお、本実施形態のパイプ体10′は、第一係合部20を二つ、第二係合部30を三つ設けた構成であるが、本発明のパイプ体は、これら第一係合部および第二係合部の数に限定されるものではなく、少なくとも各一つずつ設けた構成であればよい。
【0077】
(変形例1)
上述した実施形態1は、第一係合部として、比較的単純な形状の雄型係合部と雌型係合部との組合せを適用したものであるが、例えば図6に示す雌型係合部21と雄型係合部22との組合せからなる第一係合部20を適用した変形例のパイプ体10′としてもよい。
【0078】
すなわち、図6に示した第一係合部20は、雌型係合部21の舌片21a,21bの先端21d,21eが、開口の外側に向かうにしたがって、両舌片21a,21bの先端21d,21eの間隔が広くなるように、R形状に形成されている。
【0079】
そして、両舌片21a,21bがこのように形成されていることによって、同図(b)に示すように、端縁部11,12同士を周方向に突き合わせて、雄型係合部22の二つの突起片22a,22bを雌型係合部21の開口Kに挿入させる際に、突起片22a,22bの先端を円滑に挿入させることができる。
【0080】
また、両舌片21a,21bは、その一部が端縁部11よりも外方すなわち端縁部12側に突出した膨出部21f,21gを有し、雄型係合部22の突起片22a,22bが形成された端縁部12の対応部分に、端縁部12よりも後退した陥凹部22e,22fが形成されている。
【0081】
そして、このように膨出部21f,21gおよび陥凹部22e,22fが形成されていることによって、両端縁部11,12が同図(c)に示すように突き合わされた状態では、膨出部21f,21gと陥凹部22e,22fとが嵌め合わせとなり、両端縁部11,12の延在方向に沿った方向に両端縁部11,12が位置ずれするのを防止することができる。
【0082】
さらに、舌片21a,21bの膨出部21f,21gの肩部21h,21iが、面取り状に傾斜して形成されているため、膨出部21f,21gが陥凹部22e,22fに嵌め合わされる際に、陥凹部22e,22fの側壁が、この肩部21h,21iの傾斜面に沿って案内され、両者の嵌合わせを容易かつ円滑に行うことができる。
【0083】
また、この肩部21h,21iの傾斜面に対して、陥凹部22e,22fの側壁から、当該傾斜面に直交する方向に押圧力が作用するため、同図(b)に示すように、舌片21a,21bの各先端がそれぞれ、開口Kから進入した突起片22a,22bの側面に強く当接し、突起片22a,22bの側面との摩擦力によって、舌片21a,21bが同図(c)に示すように屈曲変形しつつ、突起片22a,22bの進入が進行する。
【0084】
したがって、舌片21a,21bが突起片22a,22bの抜止め作用をも奏することができる。
【0085】
なお、図6に示すように、陥凹部22e,22fの対応する側壁すなわち端縁部12に連なる開口の両縁部にもそれぞれ、肩部21h,21iに形成された傾斜と当接する傾斜案内部を形成することにより、両者の嵌合わせを一層が容易かつ円滑にすることができる。
【0086】
また、雌型係合部21の凹状の切欠き内部に形成された楔状の突起21cの先端を端縁部11よりも突出して形成することによって、両端縁部11,12の突合わせ状態では、この突起21cの先端が、両突起片22a,22bの間の空間22gの最深部近傍まで入り込み、これによって、両突起片22a,22bと突起21cとの間の遊びが排除され、両突起片22a,22b間の間隔が狭くなる方向に変形する可能性を排除することができ、強固な係止力を得ることができる。
【0087】
【発明の効果】
以上、説明したように、本発明に係るパイプ体によれば、第一係合部が端縁部同士を周壁の周方向について係止することにより、端縁部同士が周壁の周方向に離隔するのを阻止するとともに、第二係合部が端縁部同士を周壁の内側方向および外側方向について係止するため、端縁部同士が周壁の内外方向に離隔するのを阻止する。
【0088】
したがって、互いに接合された両端縁部の少なくとも一方に、周壁の面内方向やこの周壁に直交する方向(周壁の内側方向、外側方向)に沿った外力が作用した場合であっても、接合された端縁部同士が離れることがなく、パイプ体としての剛性を維持することができる。
【図面の簡単な説明】
【図1】本発明に係る実施形態のパイプ体を示す展開図および斜視図である。
【図2】図1に示したパイプ体の第一係合部の係止作用を説明する斜視図である。
【図3】図1に示したパイプ体の第二係合部の係止作用を説明する斜視図および断面図(その1)である。
【図4】図1に示したパイプ体の第二係合部の係止作用を説明する斜視図および断面図(その2)である。
【図5】図1に示したパイプ体の第二係合部の係止作用を説明する斜視図および断面図(その3)である。
【図6】第一係止部の変形例を示す平面図である。
【図7】従来のパイプ体を示す展開図および斜視図である。
【図8】端縁部11,12が周壁内外方向に離隔する様子を説明する模式図である。
【符号の説明】
10 金属パネル
10′パイプ体
11,12 端縁部
13 周壁
20 第一係合部
21 雌型係合部
22 雄型係合部
30 第二係合部
31 内面支持舌片(内面支持係合部)
32 内面当接部(内面支持係合部)
33 外面当接部(外面支持係合部)
34 外面支持舌片(外面支持係合部)
L1,L2,L3 仮想折曲線
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe body formed by abutting a pair of end edges in the circumferential direction, and in particular, relates to an improvement of an engaging portion formed on these end edges.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hollow pipe body having a peripheral wall having an annular cross section has been manufactured by bending a metal plate into an annular shape and butting a pair of edges in the circumferential direction.
[0003]
And, in such a pipe body, engaging portions that engage with each other are formed at both end edges that are abutted, and the engaging portions are engaged in a state in which the end edges are abutted with each other. Thus, a joined state in which the butted state of both end edges is maintained is obtained.
[0004]
That is, for example, a substantially rectangular flat metal panel 10 shown in FIG. 7A is bent along virtual folding lines L1, L2, and L3 that are parallel to each other, and as shown in FIG. 7B, these virtual folding lines L1. , L2 and L3, a pair of end edges 11 and end edges 12 are joined to each other. The engaging portion 20 formed of the male engaging portion 22 formed on the portion 21 and the end edge portion 12 is engaged.
[0005]
Here, as shown in detail in FIG. 2 (a), the female engagement portion 21 is formed by cutting out from one end edge portion 11 in a concave shape, and the male engagement portion 22 is formed at the other end. It protrudes from the edge 12.
[0006]
The female engagement portion 21 is formed with tongue pieces 21a and 21b that form the female engagement portion 21 in a constricted shape at both edge portions of the opening K continuous with the end edge portion 11, respectively. Projecting from the bottom of the notch of the female engaging portion 21 facing K toward the opening K, abuts on the male engaging portion 22 inserted from the opening K to deform the male engaging portion. A wedge-shaped protrusion 21c is formed.
[0007]
On the other hand, the male engagement portion 22 includes two projection pieces 22a and 22b in which the wedge-shaped projection 21c is expanded and deformed with the gap being widened. The overall width N of the two projection pieces 22a and 22b is as follows. The opening K is set slightly narrower than the width M of the opening K (N <M).
[0008]
Therefore, even if both edge portions 11 and 12 are close to each other in the direction of arrow P, as shown in FIG. 2 (b), both the projecting pieces 22a and 22b of the male engagement portion 22 are connected to the female engagement from the opening K. Enter the joint 21 without resistance.
[0009]
In addition, inclined two inclined surfaces 22c and 22d are formed on the opposing wall surfaces of the two protruding pieces 22a and 22b so that the two protruding pieces 22a and 22b are tapered toward the tip.
[0010]
Then, when the proximity of the edge portions 11 and 12 progresses and the inclined surfaces 22c and 22d of the two protrusion pieces 22a and 22b come into contact with the inclined surface of the wedge-shaped protrusion 21c, the inclined surfaces 22c and 22b of the protrusion pieces 22a and 22b are brought into contact with each other. 22d slides along the slope of the wedge-shaped protrusion 21c, whereby the protrusion pieces 22a and 22b are expanded and deformed in the direction in which the distance between both increases, and the two protrusion pieces 22a and 22b in the expanded state are formed. Is larger than the width M of the opening K (N ′> M), both engaging portions 21 and 22 are locked, and both end edges 11 and 12 are held in a joined state. Thus, the shape of the square pipe body 10 'is maintained (Patent Document 1).
[0011]
[Patent Document 1]
JP 2001-286934 A
[0012]
[Problems to be solved by the invention]
By the way, since the engaging part described above is configured to lock the end edges in the circumferential direction of the peripheral wall by the deformation of the engaging part in the plane of the peripheral wall, the both end edges are separated in the circumferential direction. The rigidity against the load in the direction is high.
[0013]
However, with respect to a load acting in the inner and outer directions of the peripheral wall (shear direction in the thickness direction of the peripheral wall), only the frictional force between the end faces in the thickness direction of the engaging portion is only a drag force. Since the contact area of the surface is very small, it cannot be said that the surface has sufficient rigidity compared to the rigidity against the load acting in the circumferential direction of the peripheral wall.
[0014]
That is, for example, as shown in FIG. 8, a bracket 14 for fixing other components is joined to a portion of the peripheral wall 13 in the vicinity of the joint, and the outer direction of the peripheral wall 13 ( When a load to be pulled up (in the direction away from the axis C of the pipe body 10 ′), that is, upward in the figure, is applied, the engaging state of the engaging portion 20 is released relatively easily, and both end edges 11, 12 are inward and outward of the peripheral wall 13 The pipe body 10 'is no longer used.
[0015]
The present invention has been made in view of the above circumstances, and it is possible to prevent the joined edge portions from being easily separated not only in the circumferential direction of the peripheral wall but also in the inner and outer directions of the peripheral wall. The object is to provide a pipe body.
[0016]
[Means for Solving the Problems]
In order to solve the above problems, a pipe body according to the present invention is a pipe body joined by abutting a pair of end edges in a deployed state, and is engaged in the circumferential direction of the peripheral wall of the pipe body. And a second engaging portion that locks in the inner direction and the outer direction of the peripheral wall, so that the joined edge portions are not separated from each other in the circumferential direction and in the inner and outer directions.
[0017]
That is, in the pipe body according to claim 1 of the present invention, the end portions are engaged with each other in a state where a pair of end edge portions are butted in the circumferential direction, whereby the end portions are engaged with each other. A pipe body formed by forming a peripheral wall having an annular cross section in which edges are maintained in a joined state, wherein the engagement portion is a first engagement for locking the end edges in the circumferential direction of the peripheral wall. And a second engaging portion that locks in the inner direction and the outer direction of the peripheral wall.
[0018]
According to the pipe body according to the first aspect of the present invention configured as described above, the first engaging portions lock the end edges in the circumferential direction of the peripheral wall, so that the end edges are arranged around the peripheral wall. In addition to preventing separation in the direction, the second engagement portion locks the end edges in the inner and outer directions of the peripheral wall, thereby preventing the end edges from being separated in the inner and outer directions of the peripheral wall. .
[0019]
Therefore, even if an external force along the in-plane direction of the peripheral wall or in a direction orthogonal to the peripheral wall (inner direction or outer direction of the peripheral wall) acts on at least one of the edge portions joined to each other, it is bonded. The end edges are not separated from each other, and the rigidity of the pipe body can be maintained.
[0020]
Further, the pipe body according to claim 2 of the present invention is the pipe body according to claim 1, wherein the first engagement portion is a female engagement portion cut out in a concave shape from one end edge portion; It is formed to protrude from the other end edge portion, and is formed of a male engagement portion that engages with the female engagement portion, and is provided at both edge portions of the opening that is continuous with the end edge portion of the female engagement portion. A tongue piece for forming the female engagement portion in a constricted shape is formed.
[0021]
According to the pipe body according to claim 2 of the present invention configured as described above, when the male engaging portion is engaged with the female engaging portion and the male engaging portion is deformed, the female It is easy to be caught by the tongue piece which forms the constriction shape of an engaging part, and both can be made into a latching state easily.
[0022]
In the pipe body according to claim 3 of the present invention, in the pipe body according to claim 2, the distance between the tips of the two tongue pieces increases as the tips of the tongue pieces go to the outside of the opening. It is characterized by being formed.
[0023]
According to the pipe body according to claim 3 of the present invention configured as described above, when the edge portions are butted in the circumferential direction and the male engaging portion is engaged with the female engaging portion, the male engaging portion is engaged. The tip of the mold engaging portion enters from the outside of the opening of both tongue pieces. Since the distance between the tips of both tongue pieces is set wide on the outside of the opening, it is easy to insert the male engaging portion.
[0024]
The pipe body according to claim 4 of the present invention is the pipe body according to claim 2 or 3, wherein at least a part of the tongue piece of the female engagement portion protrudes outward from the edge portion. The corresponding portion of the end edge portion on the side where the male engagement portion is formed is recessed corresponding to the protrusion of the tongue piece from the end edge portion.
[0025]
According to the pipe body according to claim 4 of the present invention configured as described above, a part of the tongue piece protrudes outward from the end edge portion on the side where the female engagement portion is formed, and the male engagement Since the edge portion on the side where the joint portion is formed is recessed corresponding to the protruding portion, the protruding portion and the recessed portion are fitted together, and the jointed end edge portions are extended. It is possible to prevent the end edges from being displaced in the direction along the existing direction.
[0026]
Moreover, the pipe body which concerns on Claim 5 of this invention is a pipe body which concerns on Claim 4, The shoulder part of the part which protruded from the said edge part among the said tongue pieces is inclined and formed in the chamfering shape. It is characterized by being.
[0027]
According to the pipe body according to the fifth aspect of the present invention configured as described above, the shoulder portion protruding outward from the tongue piece is inclined in a chamfered shape, and thus the protruding portion is male. When fitting into the recessed part of the mold engaging part, the corner part of the recessed part is guided along the inclined surface, and the two parts can be easily fitted together.
[0028]
Further, the pipe body according to claim 6 of the present invention is the pipe body according to claim 4, wherein the shoulder portion of the tongue piece protruding from the end edge portion is formed in a chamfered shape, And the inclination guide part which contact | abuts the inclination formed in the said shoulder part is formed in the both edge parts of the opening connected to the said edge part among the said recessed parts of the said male type engaging part, respectively. Features.
[0029]
According to the pipe body according to claim 6 of the present invention configured as described above, a part of the shoulder portion protruding outward of the tongue piece is inclined in a chamfered shape, and the male engagement portion is recessed. Since both edge portions of the opening of the portion are also inclined, when the protruding portion of the tongue piece is fitted into the recessed portion of the male engaging portion, the inclined surfaces of the two become the guide surfaces. Guided and can be easily fitted together.
[0030]
A pipe body according to a seventh aspect of the present invention is the pipe body according to any one of the second to sixth aspects, wherein the female engagement portion is formed from the bottom of the notch facing the opening. Protrusions that project toward the opening and abut against the male engaging portion inserted from the opening to deform the male engaging portion are formed.
[0031]
According to the pipe body according to the seventh aspect of the present invention configured as described above, the pair of end edges are abutted in the circumferential direction, and the male engaging portion and the female engaging portion are engaged. In the process, the male engaging portion deforms inside the concave notch of the female contacting portion while contacting the protrusion of the female engaging portion, and as a result, both engaging portions are locked, Both edge portions are locked in the circumferential direction of the peripheral wall.
[0032]
And since this locking proceeds simultaneously with the process of matching the edge portions, it is necessary to separately deform and lock the male and female engaging portions after the process of matching the edge portions. It is possible to manufacture with a simple manufacturing process.
[0033]
The pipe body according to an eighth aspect of the present invention is the pipe body according to the seventh aspect, wherein the male engagement portion includes two projecting pieces that expand so as to widen the distance by the deformation, The tip of the projection of the female engagement portion is formed in a wedge shape so as to be fitted between the two projection pieces.
[0034]
According to the pipe body according to claim 8 of the present invention configured as described above, the pair of end edges are abutted in the circumferential direction, and the male engagement portion and the female engagement portion are engaged. In this process, the wedge-shaped projection of the female engagement portion relatively cuts in between the two projection pieces of the male engagement portion. Deformation proceeds and both engaging portions can be easily locked.
[0035]
The pipe body according to a ninth aspect of the present invention is the pipe body according to the eighth aspect, wherein at least the two projecting pieces face each other such that the two projecting pieces taper toward the tip. Is formed with an inclination.
[0036]
According to the pipe body according to the ninth aspect of the present invention configured as described above, when the wedge-shaped projection of the female engaging portion is inserted between the two projection pieces, the opposing walls of the two projection pieces are arranged. Is inclined, the contact area with the slope of the wedge-shaped projection increases, the frictional force between them is reduced, and the deformation of the two projection pieces can be facilitated.
[0037]
The pipe body according to a tenth aspect of the present invention is the pipe body according to any one of the first to ninth aspects, wherein the second engagement portion extends from the one end edge portion, and An inner surface support engagement portion that contacts the inner surface side of the peripheral wall of the other end edge portion, and an outer surface support engagement portion that extends from the other end edge portion and contacts the outer surface side of the peripheral wall of the one end edge portion, The other end edge part which an inner surface support engagement part and the said outer surface support engagement part each oppose is formed receding from this edge part, It is characterized by the above-mentioned.
[0038]
According to the pipe body according to the tenth aspect of the present invention configured as described above, the inner surface support engagement portion sinks into the inner surface side of the peripheral wall of the opposite end edge portion, and comes into contact with the inner surface side, thereby the peripheral wall portion. Is supported from the inner surface side. Therefore, the peripheral wall on the edge portion side supported from the inner surface side is prevented from being displaced inward of the peripheral wall with respect to the peripheral wall on the edge portion side where the inner surface support engagement portion is formed.
[0039]
On the other hand, the outer surface support engagement portion rides on the outer peripheral surface side of the opposite end edge portion and contacts the outer surface side, thereby supporting the peripheral wall portion from the outer surface side. Accordingly, the peripheral wall on the edge portion side supported from the outer surface side is prevented from being displaced to the outside of the peripheral wall with respect to the peripheral wall on the edge portion side where the outer surface support engagement portion is formed.
[0040]
In addition, since the end edge on the other side where the inner surface support engagement portion and the outer surface support engagement portion face each other is formed so as to recede from the original end edge portion, the inner surface support engagement portion is the inner surface of the peripheral wall. Interference between the vicinity of the bending start point until it completely sinks to the side and the other end edge, and the vicinity of the bending start point until the outer surface support engagement part completely rides on the outer surface side of the peripheral wall and the other party Interference with the side edge portions can be prevented, respectively, and it is possible to prevent a gap from occurring at the joint portion between the edge portions other than the portion where the second engaging portion is formed.
[0041]
The pipe body according to an eleventh aspect of the present invention is the pipe body according to the tenth aspect, wherein the peripheral wall outer surface side of the distal end portion of the inner surface support engagement portion and / or the other end with which the inner surface support engagement portion is in contact. It is characterized in that the peripheral wall inner surface side of the edge portion is inclined and formed so as to be tapered in the thickness direction.
[0042]
According to the pipe body according to the eleventh aspect of the present invention configured as described above, when the inner surface support engagement portion is made to enter the inner surface side of the peripheral wall of the other end edge portion, the front end portion of the inner surface support engagement portion and Since at least one of the opposing side edge portions is formed so as to be tapered in the thickness direction, it can be easily guided to the surface side to be submerged.
[0043]
A pipe body according to a twelfth aspect of the present invention is the pipe body according to the tenth or eleventh aspect, wherein the peripheral wall inner surface side of the distal end portion of the outer surface support engagement portion and / or the counterpart with which the outer surface support engagement portion contacts. It is characterized in that the peripheral wall outer surface side of the side end edge portion is formed so as to be tapered in the thickness direction.
[0044]
According to the pipe body according to the twelfth aspect of the present invention configured as described above, when the outer surface support engagement portion rides on the outer surface side of the peripheral wall of the mating end edge portion, the front end portion of the outer surface support engagement portion and its Since at least one of the mating end edges is formed so as to be tapered in the thickness direction, it can be easily guided to the surface to be ridden.
[0045]
A pipe body according to a thirteenth aspect of the present invention is the pipe body according to any one of the tenth to twelfth aspects, wherein a tip portion of the inner surface support engagement portion is in contact with the inner surface support engagement portion. It is formed to be inclined toward the inner surface side of the peripheral wall of the mating end edge.
[0046]
According to the pipe body according to the thirteenth aspect of the present invention configured as described above, when the inner surface support engagement portion is brought into the peripheral wall inner surface side of the counterpart end edge portion, the distal end portion of the inner surface support engagement portion is Since it forms inclining in the peripheral wall inner surface side of the other party edge part, it can make it easy to guide | invade to the surface side which is going to be submerged.
[0047]
A pipe body according to a fourteenth aspect of the present invention is the pipe body according to any one of the tenth to thirteenth aspects, wherein a tip portion of the outer surface support engagement portion is in contact with the outer surface support engagement portion. It is formed to be inclined toward the outer peripheral surface side of the peripheral edge of the mating side edge.
[0048]
According to the pipe body according to the fourteenth aspect of the present invention configured as described above, when the outer surface support engagement portion rides on the outer surface side of the peripheral wall of the counterpart end edge portion, the distal end portion of the outer surface support engagement portion is Since it forms inclining in the peripheral wall outer surface side of the other party edge part, it can make it easy to guide to the surface side to make it ride.
[0049]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of a pipe body according to the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1A is a development view showing a metal panel 10 in which a pipe body 10 ′ according to an embodiment (Embodiment 1) of the present invention is developed into a single flat plate shape, and FIG. It is a perspective view which shows the pipe body 10 'which concerns.
[0050]
The illustrated pipe body 10 'is a rectangular pipe body having a square cross section, and is formed by bending a substantially rectangular flat metal panel 10 along virtual folding lines L1, L2, L3 parallel to each other, and these virtual folding lines L1. , L2 and L3, a pair of end edge portions 11 and end edge portions 12 are abutted, and the first engagement portion 20 and the second engagement portion 30 formed on the end edge portion 11 are engaged separately. By doing so, the pipe body 10 'is formed.
[0051]
Here, the first engagement portion 20 includes a female engagement portion 21 formed on one end edge portion 11 and a male engagement portion 22 formed on the other end edge portion 12. The parts 11 and 12 are locked together in the circumferential direction of the peripheral wall 13.
[0052]
On the other hand, the second engagement portion 30 extends from one end edge portion 11 and contacts an inner surface support tongue piece (inner surface support engagement portion) 31 that contacts the inner surface of the peripheral wall of the other end edge portion 12 and the other end edge. A peripheral wall portion (hereinafter referred to as an inner surface contact portion) 32 of the portion 12 and an outer surface support tongue piece (outer surface support engagement portion) extending from the other end edge portion 12 and in contact with the outer surface side of the one end edge portion 11 ) 34 and a peripheral wall portion (hereinafter referred to as an outer surface abutting portion) 33 of the one end edge portion 11, and these end edge portions 11 and 12 are arranged in the inner and outer directions of the peripheral wall 13 (in the thickness direction of the peripheral wall). In the shear direction).
[0053]
More specifically, as shown in FIG. 2 (a), the female engagement portion 21 of the first engagement portion 20 is formed by cutting out from one end edge portion 11 into a concave shape. 22 is formed to protrude from the other edge 12.
[0054]
The female engagement portion 21 is formed with tongue pieces 21a and 21b that form the female engagement portion 21 in a constricted shape at both edge portions of the opening K continuous with the end edge portion 11, respectively. Projecting from the bottom of the notch of the female engaging portion 21 facing K toward the opening K, abuts on the male engaging portion 22 inserted from the opening K to deform the male engaging portion. A wedge-shaped protrusion 21c is formed.
[0055]
On the other hand, the male engagement portion 22 includes two projection pieces 22a and 22b in which the wedge-shaped projection 21c is expanded and deformed with the gap being widened. The overall width N of the two projection pieces 22a and 22b is as follows. The opening K is set slightly narrower than the width M of the opening K (N <M).
[0056]
Therefore, even if both edge portions 11 and 12 are close to each other in the direction of arrow P, as shown in FIG. 2 (b), both the projecting pieces 22a and 22b of the male engagement portion 22 are connected to the female engagement from the opening K. Enter the joint 21 without resistance.
[0057]
In addition, inclined two inclined surfaces 22c and 22d are formed on the opposing wall surfaces of the two protruding pieces 22a and 22b so that the two protruding pieces 22a and 22b are tapered toward the tip.
[0058]
Then, when the proximity of the edge portions 11 and 12 progresses and the inclined surfaces 22c and 22d of the two protrusion pieces 22a and 22b come into contact with the inclined surface of the wedge-shaped protrusion 21c, the inclined surfaces 22c and 22b of the protrusion pieces 22a and 22b are brought into contact. 22d slides along the slope of the wedge-shaped protrusion 21c, whereby the protrusion pieces 22a and 22b are expanded and deformed in the direction in which the distance between both increases, and the two protrusion pieces 22a and 22b in the expanded state are formed. Is wider than the width M of the opening K (N ′> M), and the engaging portions 21 and 22 are locked.
[0059]
Further, as shown in FIG. 3A, the inner surface support tongue 31 and the outer surface contact portion 33 of the second engagement portion 30 are arranged adjacent to each other, and the outer surface support tongue 34 and the inner surface The abutting portion 32 is arranged adjacent to and in parallel.
[0060]
The inner surface supporting tongue piece 31 and the outer surface abutting portion 33 are formed at a position retracted from the end edge portion 11. Similarly, the outer surface supporting tongue piece 34 and the inner surface abutting portion 32 are also formed more than the end edge portion 12. It is formed in a retracted position. Therefore, the portion where the inner surface support tongue 31 and the outer surface contact portion 33 are formed constitutes a recess 35 with the end edge 11 as a reference, and the outer surface support tongue 34 and the inner surface contact portion 32 are formed. The part which comprises has comprised the recessed part 36 on the basis of the edge part 12. FIG.
[0061]
Moreover, the front-end | tip part of the inner surface support tongue piece 31 has the guide surface 31a in which the peripheral wall outer surface side inclined so that it might taper about the plate | board thickness direction, and the inner surface contact part 32 is tapering about the plate | board thickness direction. Thus, the peripheral wall inner surface side has an inclined guide surface 32a.
[0062]
Similarly, the front end portion of the outer surface support tongue 34 has a guide surface 34a inclined on the inner surface side of the peripheral wall so as to be tapered in the plate thickness direction, and the outer surface contact portion 33 is formed in the plate thickness direction. The peripheral wall outer surface side has an inclined guide surface 33a so as to be tapered.
[0063]
Further, the inner surface support tongue 31 is formed to be inclined at an angle α (see FIG. 3B) on the inner surface contact portion 32 side, and the outer surface support tongue piece 34 is also formed on the outer surface contact portion 33 side with an angle α ( It is formed to be inclined only as shown in FIG.
[0064]
Next, the operation of the pipe body 10 'of this embodiment will be described.
[0065]
Here, the pipe body 10 ′ is formed by bending the substantially rectangular flat plate-like metal panel 10 along the virtual folding lines L 1, L 2, and L 3 in the unfolded state as described above. When the end edge portion 12 is abutted, the first engagement portion 20 and the second engagement portion 30 formed on the end edge portion 11 are engaged with each other.
[0066]
First, regarding the engaging action of the first engaging portion 20, as described above, both end edge portions 11 and 12 are close to each other in the direction of the arrow P, and the male engaging portion as shown in FIG. The two protrusion pieces 22 a and 22 b enter the female engagement portion 21 through the opening K.
[0067]
When the inclined surfaces 22c and 22d formed at the tips of the two protruding pieces 22a and 22b come into contact with the inclined surfaces of the wedge-shaped protrusions 21c, the inclined surfaces 22c and 22d of the protruding pieces 22a and 22b become wedge-shaped protrusions 21c. And is expanded and deformed in a direction in which the interval between the protrusions 22a and 22b is widened, the female engaging portion 21 and the male engaging portion 22 are locked, and both end edges 11 and 12 are connected. It has sufficient rigidity with respect to the external force acting so as to be separated in the circumferential direction of the peripheral wall 13.
[0068]
On the other hand, when both end edges 11 and 12 begin to approach in the direction of arrow P, as shown in FIG. 3, the tip of the inner surface support tongue 31 of the second engagement portion 30 approaches the inner surface abutting portion 32 and supports the outer surface. The tip of the tongue piece 34 approaches the outer surface contact portion 33.
[0069]
As this approach further proceeds, as shown in FIG. 4B, the guide surface 31a formed at the tip of the inner surface support tongue 31 and the guide surface 32a formed at the inner surface contact portion 32 come into contact with each other. 4 (c), the guide surface 34a formed at the tip of the outer surface support tongue 34 and the guide surface 33a formed at the outer surface contact portion 33 come into contact with each other.
[0070]
At this time, since the inner surface support tongue piece 31 itself is inclined at an angle α toward the inner surface contact portion 32 side, the tip of the inner surface support tongue piece 31 is located on the inner surface contact portion 32 side (below the peripheral wall 13). D) The guide surface 31a of the inner surface support tongue 31 is formed on the outer surface side of the peripheral wall 13, and the guide surface 32a of the inner surface contact portion 32 is formed on the inner surface side of the peripheral wall 13. Also from the configuration, the front end of the inner surface supporting tongue piece 31 is easy to sink into the inner surface contact portion 32 side.
[0071]
Similarly, since the outer surface support tongue piece 34 itself is inclined at an angle α toward the outer surface contact portion 33 side, the tip of the outer surface support tongue piece 34 is positioned on the outer surface contact portion 33 side (the peripheral wall 13). The guide surface 34a of the outer surface support tongue 34 is formed on the inner surface side of the peripheral wall 13, and the guide surface 33a of the outer surface contact portion 33 is formed on the outer surface side of the peripheral wall 13. Also from this configuration, the front end of the outer surface support tongue piece 34 can easily ride on the outer surface contact portion 33 side.
[0072]
As shown in FIG. 5 (b), the inner surface supporting tongue piece 31 sinks into the inner surface abutting portion 32 until both end surface portions 11 and 12 are finally brought into contact with each other as shown in FIG. The inner surface abutting portion 32 is supported from the lower side D by the restoring force in the direction in which the inclination angle increases, that is, the lower direction D, and the restoring force in the opposite direction accompanying the deformation.
[0073]
Similarly, the outer surface support tongue 34 rides on the outer surface contact portion 33 and is deformed in the direction in which the inclination angle becomes large, that is, upward U as shown in FIG. The outer surface contact portion 33 is supported from the upper U side by the restoring force.
[0074]
Therefore, it has sufficient rigidity with respect to the external force acting so as to separate the both edge portions 11 and 12 in the inner and outer directions of the peripheral wall 13, that is, in the vertical direction in the drawing.
[0075]
As described above, according to the pipe body 10 ′ according to the present embodiment, the joined end edges 11 and 12 can be easily connected not only in the circumferential direction of the peripheral wall 13 but also in the inner and outer directions of the peripheral wall 13. Can be prevented from leaving.
[0076]
The pipe body 10 ′ of the present embodiment has a configuration in which two first engagement portions 20 and three second engagement portions 30 are provided, but the pipe body of the present invention has these first engagement portions. The number of portions and the number of second engaging portions are not limited, and any configuration may be used as long as at least one each is provided.
[0077]
(Modification 1)
In the first embodiment described above, a combination of a male engaging portion and a female engaging portion having a relatively simple shape is applied as the first engaging portion. For example, the female engaging portion shown in FIG. It is good also as pipe body 10 'of the modification which applied the 1st engagement part 20 which consists of a combination of the joint part 21 and the male type | mold engagement part 22. FIG.
[0078]
That is, the first engaging portion 20 shown in FIG. 6 has the tip portions 21d and 21e of the tongue pieces 21a and 21b of the female engaging portion 21 as the tips 21d and 21b of the tongue portions 21a and 21b move toward the outside of the opening. , 21e are formed in an R shape so that the distance between them is increased.
[0079]
And since both tongue piece 21a, 21b is formed in this way, as shown in the figure (b), the edge parts 11 and 12 are faced | matched in the circumferential direction, and two male type engaging parts 22 are provided. When inserting the two protrusion pieces 22a and 22b into the opening K of the female engagement portion 21, the tips of the protrusion pieces 22a and 22b can be inserted smoothly.
[0080]
Further, both the tongue pieces 21a and 21b have bulging portions 21f and 21g partially protruding from the end edge portion 11, that is, toward the end edge portion 12, and the protruding pieces 22a of the male engagement portion 22 are provided. , 22b are formed in the corresponding portions of the end edge portion 12 with recesses 22e, 22f that are recessed from the end edge portion 12.
[0081]
In addition, when the bulging portions 21f and 21g and the recessed portions 22e and 22f are formed as described above, the bulging portion is formed in a state where both end edges 11 and 12 are abutted as shown in FIG. 21f and 21g and recessed part 22e and 22f become fitting, and it can prevent that both-ends edge parts 11 and 12 shift in the direction along the extension direction of both-ends edge parts 11 and 12. FIG.
[0082]
Furthermore, since the shoulder portions 21h and 21i of the bulging portions 21f and 21g of the tongue pieces 21a and 21b are formed in a chamfered shape, the bulging portions 21f and 21g are fitted into the recessed portions 22e and 22f. At this time, the side walls of the recessed portions 22e and 22f are guided along the inclined surfaces of the shoulder portions 21h and 21i, and the two can be easily and smoothly fitted together.
[0083]
Further, since a pressing force acts on the inclined surfaces of the shoulder portions 21h and 21i from the side walls of the recessed portions 22e and 22f in a direction perpendicular to the inclined surfaces, as shown in FIG. The tips of the pieces 21a and 21b are in strong contact with the side surfaces of the projecting pieces 22a and 22b that have entered from the opening K, respectively, and the tongue pieces 21a and 21b are shown in FIG. ), The protrusions 22a and 22b enter while being bent and deformed.
[0084]
Therefore, the tongue pieces 21a and 21b can also exert the retaining action of the protruding pieces 22a and 22b.
[0085]
In addition, as shown in FIG. 6, the inclination guide part which contact | abuts the inclination formed in the shoulder parts 21h and 21i also to the side wall corresponding to the recessed parts 22e and 22f, ie, both edges of the opening connected to the edge part 12, respectively. By forming this, the fitting of both can be made easier and smoother.
[0086]
Further, by forming the tip of the wedge-shaped protrusion 21c formed inside the concave notch of the female engagement portion 21 so as to protrude from the end edge portion 11, the both-end edge portions 11 and 12 are in a butted state. The tip of the protrusion 21c enters to the vicinity of the deepest part of the space 22g between the protrusion pieces 22a and 22b, thereby eliminating play between the protrusion pieces 22a and 22b and the protrusion 21c. , 22b can be prevented from being deformed in the direction of narrowing, and a strong locking force can be obtained.
[0087]
【The invention's effect】
As described above, according to the pipe body according to the present invention, the first engaging portions lock the end edges in the circumferential direction of the peripheral wall, so that the end edges are separated from each other in the circumferential direction of the peripheral wall. In addition to preventing the second engaging portion from locking the end edges to each other in the inner and outer directions of the peripheral wall, the end edges are prevented from separating in the inner and outer directions of the peripheral wall.
[0088]
Therefore, even if an external force along the in-plane direction of the peripheral wall or in a direction orthogonal to the peripheral wall (inner direction or outer direction of the peripheral wall) acts on at least one of the edge portions joined to each other, it is bonded. The end edges are not separated from each other, and the rigidity of the pipe body can be maintained.
[Brief description of the drawings]
FIG. 1 is a development view and a perspective view showing a pipe body according to an embodiment of the present invention.
2 is a perspective view for explaining a locking action of a first engagement portion of the pipe body shown in FIG. 1. FIG.
FIGS. 3A and 3B are a perspective view and a cross-sectional view (part 1) for explaining a locking action of a second engagement portion of the pipe body shown in FIG.
4A and 4B are a perspective view and a cross-sectional view (No. 2) for explaining a locking action of a second engagement portion of the pipe body shown in FIG.
FIGS. 5A and 5B are a perspective view and a cross-sectional view (No. 3) illustrating a locking action of a second engaging portion of the pipe body shown in FIG.
FIG. 6 is a plan view showing a modification of the first locking portion.
FIG. 7 is a development view and a perspective view showing a conventional pipe body.
FIG. 8 is a schematic diagram for explaining a state in which the edge portions 11 and 12 are separated from each other in the direction of the inside and outside of the peripheral wall.
[Explanation of symbols]
10 Metal panel
10 'pipe body
11,12 edge
13 Perimeter wall
20 First engaging portion
21 Female engagement part
22 Male engagement part
30 Second engaging portion
31 Inner surface support tongue (inner surface support engagement part)
32 inner surface contact portion (inner surface support engagement portion)
33 Outer surface contact portion (outer surface support engagement portion)
34 Outer surface support tongue (outer surface support engagement part)
L1, L2, L3 Virtual folding line

Claims (14)

一対の端縁部同士を周方向に突き合わせた状態において前記各端縁部に形成された係合部が互いに係合することにより、前記端縁部同士が接合状態を維持した断面環状の周壁を形成してなるパイプ体であって、
前記係合部は、前記端縁部同士を、前記周壁の周方向について係止する第一係合部と、前記周壁の内側方向および外側方向について係止する第二係合部とを有することを特徴とするパイプ体。
In a state where the pair of edge portions are butted in the circumferential direction, the engagement portions formed on the respective edge portions engage with each other, so that the circumferential wall having an annular cross section in which the edge portions are maintained in a joined state. A pipe body formed,
The engaging portion includes a first engaging portion that locks the edge portions in the circumferential direction of the peripheral wall, and a second engaging portion that locks in the inner direction and the outer direction of the peripheral wall. A pipe body characterized by
前記第一係合部は、一方の端縁部から凹状に切り欠かれた雌型係合部と、他方の端縁部から突出して形成され、前記雌型係合部に係合する雄型係合部とからなり、
前記雌型係合部の前記端縁部に連なる開口の両縁部にそれぞれ、前記雌型係合部を括れ形状に形成する舌片が形成されていることを特徴とする請求項1に記載のパイプ体。
The first engaging part is a female engaging part cut out in a concave shape from one end edge part, and a male mold formed to protrude from the other end edge part and engage with the female engaging part. An engagement part,
The tongue piece which forms the said female type engaging part in a constricted shape is formed in the both edge parts of the opening connected to the said edge part of the said female type engaging part, respectively. Pipe body.
前記舌片の先端は、前記開口の外側に向かうにしたがって、該両舌片の先端の間隔が広くなるように形成されていることを特徴とする請求項2に記載のパイプ体。3. The pipe body according to claim 2, wherein a tip of the tongue piece is formed so that a distance between the tips of both tongue pieces becomes wider toward the outside of the opening. 前記雌型係合部の前記舌片は少なくとも一部が前記端縁部よりも外方に突出して形成され、前記雄型係合部が形成された側の端縁部の対応部分は、前記舌片の前記端縁部からの突出に対応して陥凹していることを特徴とする請求項2または3に記載のパイプ体。At least a part of the tongue piece of the female engaging portion protrudes outward from the end edge portion, and a corresponding portion of the end edge portion on the side where the male engaging portion is formed is The pipe body according to claim 2 or 3, wherein the tongue is recessed corresponding to the protrusion from the end edge portion of the tongue piece. 前記舌片のうち前記端縁部から突出した部分の肩部が、面取り状に傾斜して形成されていることを特徴とする請求項4に記載のパイプ体。The pipe body according to claim 4, wherein a shoulder portion of the tongue piece that protrudes from the end edge portion is formed to be inclined in a chamfered shape. 前記舌片のうち前記端縁部から突出した部分の肩部が、面取り状に傾斜して形成され、かつ前記雄型係合部の前記陥凹した部分のうち前記端縁部に連なる開口の両縁部にそれぞれ、前記肩部に形成された傾斜と当接する傾斜案内部が形成されていることを特徴とする請求項4に記載のパイプ体。A shoulder portion of the tongue piece that protrudes from the end edge portion is formed in a chamfered shape, and an opening that is continuous with the end edge portion of the recessed portion of the male engagement portion is formed. The pipe body according to claim 4, wherein an inclined guide portion that abuts on an inclination formed on the shoulder portion is formed on each of both edge portions. 前記雌型係合部のうち前記開口に対向する切欠きの底部から該開口に向かって突設され、該開口から挿入された前記雄型係合部に当接して該雄型係合部を変形させる突起が形成されていることを特徴とする請求項2から6のうちいずれか1項に記載のパイプ体。Of the female engagement portion, the male engagement portion protrudes from the bottom of the notch facing the opening toward the opening and abuts on the male engagement portion inserted from the opening. The pipe body according to any one of claims 2 to 6, wherein a protrusion to be deformed is formed. 前記雄型係合部は、前記変形によって間隔が広がるように拡開する二つの突起片を備え、前記雌型係合部の前記突起の先端は、前記二つの突起片の間に嵌入するように楔状に形成されていることを特徴とする請求項7に記載のパイプ体。The male engaging portion includes two projecting pieces that expand so that the interval is widened by the deformation, and a tip of the projecting portion of the female engaging portion is inserted between the two projecting pieces. The pipe body according to claim 7, wherein the pipe body is formed in a wedge shape. 前記二つの突起片は、先端部に向かって先細りとなるように、少なくとも該両突起片が対向する壁面が傾斜して形成されていることを特徴とする請求項8に記載のパイプ体。9. The pipe body according to claim 8, wherein the two projecting pieces are formed so that at least a wall surface facing both the projecting pieces is inclined so as to be tapered toward the tip. 前記第二係合部は、前記一方の端縁部から延びて、前記他方の端縁部の周壁内面側に接する内面支持係合部と、前記他方の端縁部から延びて、前記一方の端縁部の周壁外面側に接する外面支持係合部とからなり、前記内面支持係合部および前記外面支持係合部がそれぞれ対向する相手側の端縁部が、該端縁部よりも後退して形成されていることを特徴とする請求項1から9のうちいずれか1項に記載のパイプ体。The second engagement portion extends from the one end edge portion, and is in contact with the inner surface side of the peripheral wall of the other end edge portion, and extends from the other end edge portion, The outer edge support engagement portion is in contact with the outer surface side of the peripheral wall of the edge portion, and the opposite edge portion on which the inner surface support engagement portion and the outer surface support engagement portion face each other recedes from the edge portion. The pipe body according to any one of claims 1 to 9, wherein the pipe body is formed as described above. 前記内面支持係合部の先端部の周壁外面側および/または該内面支持係合部が接する相手側端縁部の周壁内面側が、その厚さ方向について先細りとなるように、傾斜して形成されていることを特徴とする請求項10に記載のパイプ体。A peripheral wall outer surface side of a front end portion of the inner surface support engagement portion and / or a peripheral wall inner surface side of a mating end edge portion with which the inner surface support engagement portion is in contact are formed so as to be tapered in the thickness direction. The pipe body according to claim 10, wherein the pipe body is provided. 前記外面支持係合部の先端部の周壁内面側および/または該外面支持係合部が接する相手側端縁部の周壁外面側が、その厚さ方向について先細りとなるように、傾斜して形成されていることを特徴とする請求項10または11に記載のパイプ体。The inner surface side of the peripheral wall at the front end portion of the outer surface support engagement portion and / or the outer surface side of the outer wall surface of the mating end edge with which the outer surface support engagement portion is in contact are formed so as to be tapered in the thickness direction. The pipe body according to claim 10 or 11, wherein the pipe body is provided. 前記内面支持係合部の先端部が、該内面支持係合部が接する相手側端縁部の周壁内面側に傾斜して形成されていることを特徴とする請求項10から12のうちいずれか1項に記載のパイプ体。The tip end portion of the inner surface support engagement portion is formed to be inclined toward the inner surface side of the peripheral wall of the mating end edge portion with which the inner surface support engagement portion is in contact. The pipe body according to item 1. 前記外面支持係合部の先端部が、該外面支持係合部が接する相手側端縁部の周壁外面側に傾斜して形成されていることを特徴とする請求項10から13のうちいずれか1項に記載のパイプ体。The tip end portion of the outer surface support engagement portion is formed so as to be inclined toward the outer surface side of the peripheral wall of the mating end edge portion with which the outer surface support engagement portion is in contact. The pipe body according to item 1.
JP2003171791A 2003-06-17 2003-06-17 Tubular body Pending JP2005007406A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011104653A (en) * 2009-10-23 2011-06-02 Wada Seisakusho:Kk Tubular body forming press machine and tubular body forming press method
CN103272960A (en) * 2013-06-04 2013-09-04 浙江炜驰汽车零部件股份有限公司 Welding-free circular pipe forming method
JP2014144476A (en) * 2013-01-30 2014-08-14 Ricoh Co Ltd Pipe body and method for manufacturing the same
JP2017185516A (en) * 2016-04-04 2017-10-12 サクラ工業株式会社 Non-weld seam pipe and manufacturing method of the same
US10175599B2 (en) 2016-06-28 2019-01-08 Canon Kabushiki Kaisha Rotating member, process cartridge, and image forming apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011104653A (en) * 2009-10-23 2011-06-02 Wada Seisakusho:Kk Tubular body forming press machine and tubular body forming press method
JP2014144476A (en) * 2013-01-30 2014-08-14 Ricoh Co Ltd Pipe body and method for manufacturing the same
CN103272960A (en) * 2013-06-04 2013-09-04 浙江炜驰汽车零部件股份有限公司 Welding-free circular pipe forming method
JP2017185516A (en) * 2016-04-04 2017-10-12 サクラ工業株式会社 Non-weld seam pipe and manufacturing method of the same
US10175599B2 (en) 2016-06-28 2019-01-08 Canon Kabushiki Kaisha Rotating member, process cartridge, and image forming apparatus

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