JP7426221B2 - 樹脂チューブと樹脂ジョイントの連結構造及び連結方法 - Google Patents
樹脂チューブと樹脂ジョイントの連結構造及び連結方法 Download PDFInfo
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- JP7426221B2 JP7426221B2 JP2019225028A JP2019225028A JP7426221B2 JP 7426221 B2 JP7426221 B2 JP 7426221B2 JP 2019225028 A JP2019225028 A JP 2019225028A JP 2019225028 A JP2019225028 A JP 2019225028A JP 7426221 B2 JP7426221 B2 JP 7426221B2
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
連結構造を構成する樹脂ジョイントは、レーザ光を透過可能な樹脂材料により成形された外筒と、前記外筒の内周面に対向して配置され、前記外筒の前記内周面との間に軸方向一方に開口を有する環状空間を形成する内筒とを備える。前記外筒の前記内周面又は前記内筒の外周面には、径方向に突出し且つ周方向に延びる環状突起が形成される。
樹脂ジョイントは、レーザ光を透過可能な樹脂材料により成形された外筒と、前記外筒の内周面に対向して配置され、前記外筒の前記内周面との間に軸方向一方に開口を有する環状空間を形成する内筒とを備える。前記外筒の前記内周面又は前記内筒の外周面には、径方向に突出し且つ周方向に延びる環状突起が形成される。樹脂チューブの軸方向端部は、レーザ光を吸収可能な樹脂材料により成形される。前記環状突起は、軸方向断面形状が湾曲凸状であると共に周方向全周に形成されている。前記外筒の前記内周面の内径と前記内筒に形成された前記環状突起の最大高さの位置の外径との差、または、前記外筒に形成された前記環状突起の最大高さの位置の内径と前記内筒の前記外周面の外径との差は、前記樹脂チューブの無負荷状態における厚みである基準厚みよりも小さい。
樹脂チューブと樹脂ジョイントの連結構造の対象は、例えば、自動車用部品、産業機械用部品、医療機器用部品等、種々の流体を流通させる流路に適用される。流通させる流体は、液体であってもよく、気体であってもよい。
樹脂チューブ10について、図1を参照して説明する。樹脂チューブ10は、樹脂、例えば熱可塑性樹脂により成形されている。樹脂チューブ10は、長尺状に形成されたパイプ(配管)である。樹脂チューブ10の少なくとも軸方向端部は、筒状に形成されている。樹脂チューブ10の当該軸方向端部は、例えば、円筒状に形成されている。ただし、樹脂チューブ10の軸方向端部は、円筒状に限られず、非円筒状、例えば、楕円筒、角筒状に形成されるようにしてもよい。
(3-1.第一例の樹脂ジョイント20の構成)
上述した樹脂チューブ10の軸方向端部に連結される第一例の樹脂ジョイント20の構成について、図1を参照して説明する。樹脂ジョイント20は、樹脂チューブ10と他の部材とを連結するジョイント機能を有すればよい。ただし、樹脂ジョイント20は、他の部材に対して別体で形成される場合に限られず、他の部材の一部として機能する場合を含む。つまり、樹脂ジョイント20は、樹脂チューブ10との接続部位として機能する部材であればよい。
次に、上述した樹脂チューブ10と樹脂ジョイント20との連結構造及び連結方法について図1を参照して説明する。
第二例の樹脂ジョイント50の構成について図2を参照して説明する。なお、第二例において、第一例と同一構成については、同一符号を付して説明を省略する。
第三例の樹脂ジョイント60の構成について図3を参照して説明する。なお、第三例において、第一例及び第二例と同一構成については、同一符号を付して説明を省略する。樹脂ジョイント60は、外筒部材61及び内筒部材62を備える。本例における外筒部材61及び内筒部材62は、別体の部材で異なる材料によりそれぞれ成形され、且つ、接合されている。
第四例の樹脂ジョイント70の構成について図4を参照して説明する。なお、第四例において、第一例、第二例及び第三例と同一構成については、同一符号を付して説明を省略する。樹脂ジョイント70は、外筒部材71及び内筒部材72を備える。本例における外筒部材71及び内筒部材72は、別体の部材で異なる材料によりそれぞれ成形され、且つ、接合されている。ここで、外筒部材71は、第三例の外筒部材61と同一の構成を有する。
(7-1.第五例の樹脂ジョイント80の構成)
第五例の樹脂ジョイント80の構成について図5を参照して説明する。なお、第五例において、第一例と同一構成については、同一符号を付して説明を省略する。樹脂ジョイント80は、外筒81と内筒82とを備える。外筒81と内筒82は、第一例と同様に、同種の樹脂材料により成形されており、一体的に形成された1つの部材を構成する場合を例にあげる。ただし、第二例乃至第四例のように、外筒81と内筒82とを別部材とすることもできる。
次に、上述した樹脂チューブ10と樹脂ジョイント80との連結構造及び連結方法について図5を参照して説明する。
Claims (10)
- 樹脂チューブと樹脂ジョイントの連結構造であって、
前記樹脂ジョイントは、
レーザ光を透過可能な樹脂材料により成形された外筒と、
前記外筒の内周面に対向して配置され、前記外筒の前記内周面との間に軸方向一方に開口を有する環状空間を形成する内筒と、
を備え、
前記外筒の前記内周面又は前記内筒の外周面には、径方向に突出し且つ周方向に延びる環状突起が形成され、
前記樹脂チューブの軸方向端部は、レーザ光を吸収可能な樹脂材料により成形され、
前記樹脂チューブの前記軸方向端部は、前記環状空間に挿入され、前記環状突起に倣って径方向に変形し、径方向に変形した領域に前記外筒の前記内周面に当接する面を有し、
前記外筒の前記内周面と前記樹脂チューブにおける前記外筒の前記内周面に当接する面とが、溶着されており、
前記環状突起は、軸方向断面形状が湾曲凸状であると共に周方向全周に形成されており、
前記外筒の前記内周面の内径と前記内筒に形成された前記環状突起の最大高さの位置の外径との差、または、前記外筒に形成された前記環状突起の最大高さの位置の内径と前記内筒の前記外周面の外径との差は、前記樹脂チューブの無負荷状態における厚みである基準厚みよりも小さく、
前記樹脂チューブにおける前記内筒に形成された前記環状突起と前記外筒とによって径方向に挟まれた部分と、前記外筒と、が互いに溶着しているか、
または前記樹脂チューブにおける前記外筒に形成された前記環状突起と前記内筒とによって径方向に挟まれた部分と、前記外筒と、が互いに溶着しており、
前記環状突起は、軸方向の異なる位置に複数形成されており、
前記樹脂チューブと前記外筒との溶着部は、軸方向の異なる位置に複数形成されており、
軸方向における、互いに隣り合う前記溶着部同士の間には、前記外筒の前記内周面と前記樹脂チューブの外周面との間に隙間が形成されている、
樹脂チューブと樹脂ジョイントの連結構造。 - 前記内筒の前記外周面には、径方向外方に突出し且つ周方向に延びる前記環状突起が形成され、
前記外筒の前記内周面の軸方向断面形状は、軸方向に平行な直線状に形成されている、請求項1に記載の樹脂チューブと樹脂ジョイントの連結構造。 - 前記外筒の前記内周面には、径方向内方に突出し且つ周方向に延びる前記環状突起が形成され、
前記内筒の前記外周面の軸方向断面形状は、軸方向に平行な直線状に形成されている、請求項1に記載の樹脂チューブと樹脂ジョイントの連結構造。 - 前記外筒及び前記内筒は、同種の材料により成形され、且つ、一体的に形成された1部材を構成する、請求項1-3の何れか1項に記載の樹脂チューブと樹脂ジョイントの連結構造。
- 前記外筒と前記内筒とは、異なる材料によりそれぞれ成形されている、請求項1-3の何れか1項に記載の樹脂チューブと樹脂ジョイントの連結構造。
- 前記樹脂ジョイントは、
前記外筒を含む外筒部材と、
前記内筒を含み、前記外筒部材に接合される内筒部材と、
を備え、
前記外筒部材は、レーザ光を透過可能な樹脂材料により成形され、
前記内筒部材は、レーザ光を吸収可能な樹脂材料により成形され、
前記環状空間の軸方向底部において、前記内筒部材は、前記外筒部材に当接した状態で配置され、
前記外筒部材と前記内筒部材との当接面が、溶着されている、請求項5に記載の樹脂チューブと樹脂ジョイントの連結構造。 - 前記外筒部材と前記内筒部材と前記樹脂チューブとが相互に当接する領域が、溶着されている、請求項6に記載の樹脂チューブと樹脂ジョイントの連結構造。
- 前記樹脂チューブは、複数層構造を有し、複数層のうち少なくとも1層が、レーザ光を吸収可能な樹脂材料により成形されている、請求項1-7の何れか1項に記載の樹脂チューブと樹脂ジョイントの連結構造。
- 前記樹脂チューブ及び前記樹脂ジョイントの連結構造は、自動車の燃料供給ラインに適用される、請求項8に記載の樹脂チューブと樹脂ジョイントの連結構造。
- 樹脂チューブと樹脂ジョイントの連結方法であって、
前記樹脂ジョイントは、
レーザ光を透過可能な樹脂材料により成形された外筒と、
前記外筒の内周面に対向して配置され、前記外筒の前記内周面との間に軸方向一方に開口を有する環状空間を形成する内筒と、
を備え、
前記外筒の前記内周面又は前記内筒の外周面には、径方向に突出し且つ周方向に延びる環状突起が形成され、
前記樹脂チューブの軸方向端部は、レーザ光を吸収可能な樹脂材料により成形され、
前記環状突起は、軸方向断面形状が湾曲凸状であると共に周方向全周に形成されており、
前記外筒の前記内周面の内径と前記内筒に形成された前記環状突起の最大高さの位置の外径との差、または、前記外筒に形成された前記環状突起の最大高さの位置の内径と前記内筒の前記外周面の外径との差は、前記樹脂チューブの無負荷状態における厚みである基準厚みよりも小さく、
前記樹脂チューブの前記軸方向端部を、前記環状空間に挿入させ、前記環状突起によって径方向に変形させ、且つ、径方向に変形した領域に前記外筒の前記内周面に当接する面を有する状態とさせ、
前記当接する面に向かってレーザ光を照射することによって、前記外筒の前記内周面と前記樹脂チューブにおける前記外筒の前記内周面に当接する面とをレーザ溶着させ、
前記樹脂チューブにおける前記内筒に形成された前記環状突起と前記外筒とによって径方向に挟まれた部分と、前記外筒と、を互いにレーザ溶着させるか、
または前記樹脂チューブにおける前記外筒に形成された前記環状突起と前記内筒とによって径方向に挟まれた部分と、前記外筒と、を互いにレーザ溶着させ、
前記樹脂ジョイントにおいて、前記環状突起は、軸方向の異なる位置に複数形成されており、
前記樹脂チューブの前記軸方向端部を、前記環状空間に挿入させることにより、軸方向の異なる位置に、前記樹脂チューブと前記外筒の前記内周面との互いの当接部位を複数形成し、
軸方向における、互いに隣り合う前記当接部位同士の間において、前記外筒の前記内周面と前記樹脂チューブの外周面との間に隙間が形成された状態にて、前記樹脂チューブと前記外筒とを互いにレーザ溶着させる、
樹脂チューブと樹脂ジョイントの連結方法。
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