JP4270860B2 - Flexible hose and method for manufacturing flexible hose - Google Patents

Flexible hose and method for manufacturing flexible hose Download PDF

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Publication number
JP4270860B2
JP4270860B2 JP2002378669A JP2002378669A JP4270860B2 JP 4270860 B2 JP4270860 B2 JP 4270860B2 JP 2002378669 A JP2002378669 A JP 2002378669A JP 2002378669 A JP2002378669 A JP 2002378669A JP 4270860 B2 JP4270860 B2 JP 4270860B2
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hose
pipe joint
holding
fixed
holding piece
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JP2004211722A (en
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信雄 市村
浩美 高崎
由和 高松
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Calsonic Kansei Corp
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Calsonic Kansei Corp
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Priority to JP2002378669A priority Critical patent/JP4270860B2/en
Priority to EP03029626A priority patent/EP1433990A1/en
Priority to US10/743,490 priority patent/US7000644B2/en
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  • Joints With Sleeves (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、車両用冷凍サイクルの冷媒通路などに使用されるフレキシブルホースに関するものである。
【０００２】
【従来の技術】
従来から車両用冷凍サイクルの冷媒通路などに使用されるフレキシブルホースとして、特許文献１に開示されるものが知られている。
【０００３】
このフレキシブルホースは、ゴムからなる外側ホースと、この外側ホース内に所定間隔をあけて遊挿され、ゴムからなる内側ホースとの二重管構造を備え、前記外側ホース内を冷凍サイクルのコンプレッサ吸入口に連結される低圧冷媒通路として構成し、前記内側ホース内を冷凍サイクルのコンプレッサ吐出口に連結される高圧冷媒通路として構成することにより、ホースと大気との接触面積を小さくするとともに、内側ホースを漏れ量の多い高圧流体の通路として外側ホースを相対的に漏れ量の少ない低圧流体の通路としたことにより、フレキシブルホース全体からの冷媒の漏れ量、大気中への拡散量を極めて少なくすることができるものである。
【０００４】
【特許文献１】
特許第２５９５５７８号公報
【０００５】
【発明が解決しようとする課題】
ところが、上記従来技術は、フレキシブルホースの端部に形成される口金の形状は示されているものの、外側ホースと内側ホースとの端部に口金を組付ける手段が開示されておらず、内側ホースの中心軸と外側ホースの中心軸とが一致した状態で、外側ホースと内側ホースとの端部に口金を組付けることが困難であった。
【０００６】
そこで、本発明は、二重管構造を備え、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造が設けられたフレキシブルホースを提供することを目的とする。
【０００７】
【課題を解決するための手段】
請求項１記載の発明にあっては、車両用冷凍サイクルの冷媒用通路として使用され、外側ホースと、この外側ホース内部に挿入される内側ホースと、端部に設けられた継ぎ手構造とを備えたフレキシブルホースであって、外側ホース端部に配設される外管継ぎ手と内側ホース端部に配設される内管継ぎ手とからなり、筒形状を備え、周上に溝を有する内側接続部と、該外管継ぎ手内径よりも外径寸法がわずかに小さくなるように半径方向に延設された複数の保持片と、内側ホースの端部に固持される内側ホース固持部とを具備し、該周上の溝に装着されるシール用Ｏリングによって該内側接続部が被内側接続部に密着接続される該内管継ぎ手と、筒形状を備え、周方向に溝を有する外側接続部と、該内管継ぎ手が固持される保持片固持部と、外側ホースの端部に固持される外側ホース固持部とを具備し、該周上の溝に装着されるシール用Ｏリングによって該外側接続部が被外側接続部に密着接続される該外管継ぎ手とから前記継ぎ手構造が構成され、該外側ホース端部に固持された外管継ぎ手内部に、該内側ホース端部に固持された内管継ぎ手が挿入され、該保持片固持部の外周面が加締められることで該保持片固持部内壁面に該保持片が固持されていることを特徴とする。
【０００８】
請求項２記載の発明にあっては、車両用冷凍サイクルの冷媒用通路として使用され、外側ホースと、この外側ホース内部に挿入される内側ホースと、端部に設けられた継ぎ手構造とを備えたフレキシブルホースであって、外側ホース端部に配設される外管継ぎ手と内側ホース端部に配設される内管継ぎ手とからなり、被内側接続部に連結される内側接続部と、該外管継ぎ手内径よりも外径寸法がわずかに小さくなるように半径方向に延設された複数の保持片と、内側ホースの端部に固持される内側ホース固持部とを具備し、筒形状を備えた内管継ぎ手と、被外側接続部に連結される外側接続部と、該内管継ぎ手が固持される保持片固持部と、外側ホースの端部に固持される外側ホース固持部とを具備し、筒形状を備えた外管継ぎ手とから前記継ぎ手構造が構成され、該外側ホース固持部に該保持片固持部が配設され、該外側ホース端部に固持された外管継ぎ手内部に、該内側ホース端部に固持された内管継ぎ手が挿入され、該外側ホース固持部の外周面を加締めることで該保持片固持部内壁面に該保持片が固持されることを特徴とする。
【００１０】
請求項３記載の発明にあっては、内側ホースの端部に筒形状を備えた内管継ぎ手に具備された内側ホース固持部を固持し、外側ホースに内側ホースを挿入し、外側ホースの端部に筒形状を備えた外管継ぎ手の外周面を加締めることで、外側ホース端部に外側ホース固持部を固持しつつ、該外管継ぎ手に具備された該保持片固持部内壁面に、該外管継ぎ手内径よりも外径寸法がわずかに小さくなるように内管継ぎ手の半径方向に延設された複数の保持片を固持することを特徴とする。
【００１１】
【発明の効果】
請求項１記載の発明によれば、外側ホース端部に固持された外管継ぎ手内部に、内側ホース端部に固持された内管継ぎ手が挿入され、保持片固持部の外周面が加締められることで保持片固持部内壁面に保持片が固持されることにより、二重管構造を備えつつ、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造を備えたフレキシブルホースを提供することができる。
【００１２】
請求項２記載の発明によれば、外側ホース端部に固持された外管継ぎ手内部に、内側ホース端部に固持された内管継ぎ手が挿入され、保持片固持部の外周面が加締められることで保持片固持部内壁面に保持片が固持されることにより、二重管構造を備えつつ、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造を備えたフレキシブルホースを提供することができる。
また、外側ホース固持部に保持片固持部を配設し、外側ホース固持部の外周面を加締めることで保持片固持部内壁面に保持片が固持されることにより、組立て工数を削減することができる。
【００１４】
請求項３記載の発明によれば、外側ホースの端部に外管継ぎ手の外周面を加締めることで、内管継ぎ手の保持片を固持することにより、少ない組立て工数で、二重管構造を備えつつ、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造を備えたフレキシブルホースを製造することができる。
【００１５】
【発明の実施の形態】
本発明の実施形態としてのフレキシブルホースについて、図面を参照して詳細に説明する。図１は本発明の第１実施形態にかかるフレキシブルホース１で外側ホース１１に内側ホース１３を挿入している状態を示した断面図で、図２はフレキシブルホース１が完成した状態を示す断面図、図３はフレキシブルホース１を端面側から見た図である。
【００１６】
本実施形態のフレキシブルホース１は、車両用空調装置、および車両用冷凍装置などの冷凍サイクル内を循環する冷媒の循環経路として使用されている。
【００１７】
たとえば、車両空調装置の場合には、冷媒を高温高圧に圧縮するコンプレッサはエンジン側に設置されるとともに、高圧状態のまま冷媒を冷却するコンデンサと冷媒を膨張させて周囲から熱を奪うエバポレータとが車体側に設置される。したがって、コンプレッサは、エンジン起動時およびエンジン稼働中には、エンジンが振動し、車体側と異なる動きをするために、冷媒を循環させるための通路として、硬質のパイプを用いてコンプレッサとコンデンサ、およびエバポレータとを連結した場合には、硬質パイプが破損してしまうため、可撓性を備えたフレキシブルホース１が従来から使用されている。また、フレキシブルホース１は可撓性を備えているため、車両艤装時の組付け作業が容易になることから従来から使用されている。
【００１８】
本実施形態のフレキシブルホース１は、図１に示されるように、外側ホース１１と、この外側ホース１１内部に挿入される内側ホース１３と、フレキシブルホース端部２に設けられた継ぎ手構造１５とを備えており、この継ぎ手構造１５は内管継ぎ手３０と外管継ぎ手２０から構成されている。
【００１９】
内管継ぎ手３０は、被内側接続部不図示に連結される内側接続部３３と、後述される外管継ぎ手２０内径Ｒよりも外径寸法ｒがわずかに小さくなるように半径方向に延設された複数の保持片３２と、内側ホース１３の端部に固持される内側ホース固持部３１とを具備し、筒形状を備えている。
【００２０】
また、外管継ぎ手２０は、被外側接続部不図示に連結される外側接続部２３と、内管継ぎ手３０が固持される保持片固持部２２と、外側ホース１１の端部に固持される外側ホース固持部２１とを具備し、筒形状を備えている。内管接続部３３と外管接続部２３にはそれぞれ円周上に溝が形成され、シール用Ｏリング（不図示）が装着され、それぞれ図示されない被内側接続部および被外側接続部と密着接続される。
【００２１】
内側ホース１３の端部には、内管継ぎ手３０の内側ホース固持部３１が挿入され、内側カラー３４とともに内側ホース端部１４と内側ホース固持部３１が加締め固持されている。なお、内側ホース固持部３１の外周面には円周方向に沿って複数の溝３５が設けられている。これにより、内側カラー３４とともに内側ホース端部１４と内側ホース固持部３１を加締め固持した際に、内側ホース端部１４の内周面が溝３５に引っかかり内管継ぎ手３０が脱落することを防止している。
【００２２】
また、外側ホース１１は、外側ホース端部１２に外管継ぎ手２０の外側ホース固持部２１が挿入され、外側カラー２４とともに外側ホース端部１２と外側ホース固持部２１が加締め固持されている。なお、外側ホース固持部２１の外周面には円周方向に沿って複数の溝２５が設けられている。これにより、外側カラー２４とともに外側ホース端部１２と外側ホース固持部２１を加締め固持した際に、外側ホース端部１２の内周面が溝２５に引っかかり外管継ぎ手２０が脱落することを防止している。
【００２３】
そして、外管継ぎ手２０が加締め保持された外側ホース１１の中に内管継ぎ手３０が加締め保持された内側ホース１３を保持片３２が保持片固持部２２の内側に位置するように挿入し、保持片固持部２２の外周面を加締めることで保持片固持部２２内壁面に保持片３２が固持されて、図２、図３に示される状態になり、フレキシブルホース１の組み立てが完了する。
【００２４】
なお、本実施形態では、内側ホース端部１４に内側ホース固持部３１を固持する際、および外側ホース端部１２に外側ホース固持部２１を固持する際に、内側カラー３４、および外側カラー２４とともに加締め固持する方法を用いたが、バンドクランプなどを用いて内側ホース端部１４に内側ホース固持部３１を固持することも可能である。
【００２５】
したがって、上記構成により、二重管構造を備えつつ、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造を備えたフレキシブルホースを提供することができる。
【００２６】
本実施形態の別態様として、図４、図５に示されるような継ぎ手構造１５ａ、１５ｂを備えることができる。図２に示されるような本実施形態では、外管継ぎ手２０の外側接続部２３端面から内管継ぎ手３０の内側接続部３３端部がわずかに突出するように継ぎ手構造１５が形成されているが、図４に示されるような別態様では、内側接続部３３ａ全体が外側接続部２３ａ端面から突出するように形成されているため、継ぎ手構造１５ａと被接続部材不図示との接続作業を容易にすることができる。
【００２７】
また、図５に示されるような別態様では、内側接続部３３ｂ端面と外側接続部２３ａ端面が一致するように形成されていることにより、継ぎ手構造１５ｂの全長が短縮され、フレキシブルホース１を取付ける位置に空間的な余裕が無くても設置することができる。
【００２８】
つぎに、本発明の第２実施形態としてのフレキシブルホース１′について、図面を参照して詳細に説明する。図６は本発明の第２実施形態にかかるフレキシブルホース１′の断面図である。
【００２９】
本実施形態のフレキシブルホース１′は、図６に示されるように、外側ホース１１′と、この外側ホース１１′内部に挿入される内側ホース１３′と、フレキシブルホース端部２′に設けられた継ぎ手構造１５′とを備えており、この継ぎ手構造１５′は内管継ぎ手３０′と外管継ぎ手２０′から構成されている。
【００３０】
内管継ぎ手３０′は、被内側接続部不図示に連結される内側接続部３３′と、後述される外管継ぎ手２０′内径よりも外径寸法がわずかに小さくなるように半径方向に延設された複数の保持片３２′と、内側ホース１３′の端部に固持される内側ホース固持部３１′とを具備し、筒形状を備えている。
【００３１】
また、外管継ぎ手２０′は、被外側接続部不図示に連結される外側接続部２３′と、内管継ぎ手３０′が固持される保持片固持部２２′と、外側ホース１１′の端部に固持される外側ホース固持部２１′とを具備するとともに、外管継ぎ手２０′の外側ホース固持部２１′に保持片固持部２２′が配設され、且つ筒形状を備えている。
【００３２】
内側ホース１３′の端部には、内管継ぎ手３０′の内側ホース固持部３１′が挿入され、内側カラー３４′とともに内側ホース端部１４′と内側ホース固持部３１′が加締め固持されている。なお、内側ホース固持部３１′の外周面には円周方向に沿って複数の溝３５′が設けられている。これにより、内側カラー３４′とともに内側ホース端部１４′と内側ホース固持部３１′を加締め固持した際に、内側ホース端部１４′の内周面が溝３５′に引っかかり内管継ぎ手３０′が脱落することを防止している。
【００３３】
なお、外側ホース固持部２１′の外周面には円周方向に沿って複数の溝２５′が設けられている。これにより、外側カラー２４′とともに外側ホース端部１２′と外側ホース固持部２１′を加締め固持した際に、外側ホース端部１２′の内周面が溝２５′に引っかかり外管継ぎ手２０′が脱落することを防止している。
【００３４】
そして、外側カラー２４′に外側ホース端部１２′が挿入されつつ、外側ホース端部１２′に外管継ぎ手２０′の外側ホース固持部２１′が挿入された状態の外側ホース１１′の中に内管継ぎ手３０′が加締め保持された内側ホース１３′を保持片３２′が外側ホース固持部２１′保持片固持部２２′の内側に位置するように挿入し、外側ホース固持部２１′保持片固持部２２′の外周面を加締めることで、外側カラー２４′とともに外側ホース端部１２′と外側ホース固持部２１′が加締め固持されつつ、保持片固持部２２′内壁面に保持片３２′が固持されて、フレキシブルホース１′の組み立てが完了する。
【００３５】
なお、本実施形態では、内側ホース端部１４′に内側ホース固持部３１′を固持する際、および外側ホース端部１２′に外側ホース固持部２１′を固持する際に、内側カラー３４′、および外側カラー２４′とともに加締め固持する方法を用いたが、バンドクランプなどを用いて内側ホース端部１４′に内側ホース固持部３１′を固持することも可能である。
【００３６】
したがって、上記構成により、二重管構造を備えつつ、端部に内側ホースの中心軸と外側ホースの中心軸とが一致した継ぎ手構造を備えたフレキシブルホースを提供することができる。
【００３７】
また、外側ホースの端部に外管継ぎ手の外周面を加締めることによって、内管継ぎ手の保持片を固持することにより、組立て工数を削減することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態のフレキシブルホースで外側ホースに内側ホースを挿入している状態を示した断面図である。
【図２】本発明の第１実施形態のフレキシブルホースが完成した状態を示す断面図である。
【図３】本発明の第１実施形態のフレキシブルホースを端面側から見た図である。
【図４】本発明の第１実施形態の継ぎ手構造部分の別態様を示す斜視図である。
【図５】本発明の第１実施形態の継ぎ手構造部分の別態様を示す斜視図である。
【図６】本発明の第２実施形態のフレキシブルホースの断面図である。
【符号の説明】
１…フレキシブルホース
２…フレキシブルホース端部（端部）
１１…外側ホース
１２…内側ホース
１５…継ぎ手構造
２０…外管継ぎ手
２１…外側ホース固持部
２２…保持片固持部
２３…外側接続部
３０…内管継ぎ手
３１…内側ホース固持部
３２…保持片
３３…内側接続部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible hose used in a refrigerant passage of a refrigeration cycle for vehicles.
[0002]
[Prior art]
Conventionally, what is indicated by patent documents 1 is known as a flexible hose used for a refrigerant passage etc. of a refrigeration cycle for vehicles.
[0003]
This flexible hose has a double-pipe structure of an outer hose made of rubber and an inner hose made of rubber that is loosely inserted into the outer hose at a predetermined interval. By constructing as a low-pressure refrigerant passage connected to the opening, and configuring the inside of the inner hose as a high-pressure refrigerant passage connected to the compressor discharge port of the refrigeration cycle, the contact area between the hose and the atmosphere is reduced, and the inner hose By making the outer hose a low-pressure fluid passage with a relatively small leakage amount and a high-pressure fluid passage with a large amount of leakage, the amount of refrigerant leakage from the entire flexible hose and the amount of diffusion into the atmosphere can be extremely reduced. It is something that can be done.
[0004]
[Patent Document 1]
Japanese Patent No. 2595578
[Problems to be solved by the invention]
However, in the above prior art, although the shape of the base formed at the end of the flexible hose is shown, the means for assembling the base at the end of the outer hose and the inner hose is not disclosed, and the inner hose is not disclosed. It was difficult to assemble the base at the ends of the outer hose and the inner hose in a state where the central axis of the outer hose and the central axis of the outer hose coincided.
[0006]
Therefore, an object of the present invention is to provide a flexible hose having a double pipe structure and having a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other at the end.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 includes an outer hose, an inner hose inserted into the outer hose, and a joint structure provided at an end portion, which is used as a refrigerant passage in a vehicle refrigeration cycle. and a flexible hose made within fitting disposed outside the fitting and the inner hose end is disposed outside the hose end, with a cylindrical inner connection portion having a groove on the peripheral And a plurality of holding pieces extending in the radial direction so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint, and an inner hose holding part fixed to the end of the inner hose, an outer connecting portion having a said inner pipe joint inner connecting portion is in close contact connected to the inner connecting portion includes a cylindrical shape, a groove in the circumferential direction by a sealing O-ring mounted in a groove on the peripheral, A holding piece holding portion to which the inner pipe joint is held; Comprising an outer hose anchorage portion which is fixedly held to the end on the side hose, the outer fitting to the outer connecting portion is in close contact connected to the outer connecting portions by sealing O-rings mounted in grooves on the peripheral The joint structure is constituted by the inner pipe joint, which is fixed to the inner hose end, is inserted into the outer pipe joint, which is fixed to the outer hose end, and the outer peripheral surface of the holding piece holding part is added. The holding piece is fixed to the inner wall surface of the holding piece holding portion by being tightened.
[0008]
The invention according to claim 2 includes an outer hose, an inner hose inserted into the outer hose, and a joint structure provided at an end portion, which is used as a refrigerant passage of the vehicle refrigeration cycle. A flexible hose comprising an outer pipe joint disposed at the outer hose end and an inner pipe joint disposed at the inner hose end; A plurality of holding pieces extending in the radial direction so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint, and an inner hose holding part fixed to the end of the inner hose Provided with an inner pipe joint, an outer connection part connected to the outside connection part, a holding piece holding part for holding the inner pipe joint, and an outer hose holding part fixed to an end of the outer hose. And from the outer pipe joint having a cylindrical shape Wei hand structure is constituted, the holding piece anchorage portion is disposed on the outer hose persist portion, inside the outer fitting which is fixedly held in the outer hose end, the inner tube fitting which is fixedly held on the inner hose end There is inserted, characterized in that the outer hose anchorage part the holding strips an outer peripheral surface to the holding piece anchorage portion wall by caulking of is fixedly held.
[0010]
In the invention according to claim 3, the inner hose holding portion provided in the inner pipe joint having a cylindrical shape is fixed to the end portion of the inner hose, the inner hose is inserted into the outer hose, and the end of the outer hose is inserted. By crimping the outer peripheral surface of the outer pipe joint having a cylindrical shape at the part, the outer hose holding part is held at the outer hose end , and the holding piece holding part inner wall surface provided in the outer pipe joint is A plurality of holding pieces extending in the radial direction of the inner pipe joint are fixed so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint.
[0011]
【The invention's effect】
According to the first aspect of the present invention, the inner pipe joint fixed to the inner hose end portion is inserted into the outer pipe joint fixed to the outer hose end portion, and the outer peripheral surface of the holding piece holding portion is crimped. By holding the holding piece on the inner wall surface of the holding piece holding portion, a flexible hose having a double pipe structure and a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other at the end. Can be provided.
[0012]
According to the second aspect of the present invention , the inner pipe joint fixed to the inner hose end portion is inserted into the outer pipe joint fixed to the outer hose end portion, and the outer peripheral surface of the holding piece holding portion is crimped. By holding the holding piece on the inner wall surface of the holding piece holding portion, a flexible hose having a double pipe structure and a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other at the end. Can be provided.
In addition, the holding piece holding portion is disposed in the outer hose holding portion, and the holding piece is held on the inner wall surface of the holding piece holding portion by caulking the outer peripheral surface of the outer hose holding portion, thereby reducing the assembly man-hours. it can.
[0014]
According to the third aspect of the present invention, the outer pipe joint outer peripheral surface is caulked to the end of the outer hose, so that the holding piece of the inner pipe joint is firmly held, so that the double pipe structure can be formed with less assembly man-hours. A flexible hose having a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other at the end can be manufactured.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
A flexible hose as an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a state in which an inner hose 13 is inserted into an outer hose 11 in the flexible hose 1 according to the first embodiment of the present invention, and FIG. 2 is a sectional view showing a state in which the flexible hose 1 is completed. FIG. 3 is a view of the flexible hose 1 as seen from the end face side.
[0016]
The flexible hose 1 of the present embodiment is used as a refrigerant circulation path that circulates in a refrigeration cycle such as a vehicle air conditioner and a vehicle refrigeration apparatus.
[0017]
For example, in the case of a vehicle air conditioner, a compressor that compresses a refrigerant to high temperature and high pressure is installed on the engine side, and a condenser that cools the refrigerant in a high pressure state and an evaporator that expands the refrigerant and takes heat away from the surroundings. Installed on the car body side. Therefore, the compressor vibrates when the engine is started and during the engine operation, and moves differently from the vehicle body side. When the evaporator and the evaporator are connected, the hard pipe is damaged, so that the flexible hose 1 having flexibility has been conventionally used. Moreover, since the flexible hose 1 has flexibility, the assembly work at the time of vehicle mounting becomes easy, and it has been used conventionally.
[0018]
As shown in FIG. 1, the flexible hose 1 of the present embodiment includes an outer hose 11, an inner hose 13 inserted into the outer hose 11, and a joint structure 15 provided at the flexible hose end 2. The joint structure 15 includes an inner pipe joint 30 and an outer pipe joint 20.
[0019]
The inner pipe joint 30 is extended in the radial direction so that the outer diameter r is slightly smaller than the inner connection part 33 (not shown) connected to the inner connection part and the inner diameter R of the outer pipe joint 20 described later. A plurality of holding pieces 32 and an inner hose holding part 31 fixed to the end of the inner hose 13 are provided, and a cylindrical shape is provided.
[0020]
The outer pipe joint 20 includes an outer connection part 23 that is connected to the outer connection part (not shown), a holding piece holding part 22 that holds the inner pipe joint 30, and an outer part that is fixed to the end of the outer hose 11. The hose holding part 21 is provided and has a cylindrical shape. The inner tube connecting portion 33 and the outer tube connecting portion 23 are each formed with a groove on the circumference and fitted with a sealing O-ring (not shown), and are intimately connected to the inner connection portion and the outer connection portion (not shown), respectively. Is done.
[0021]
The inner hose holding portion 31 of the inner pipe joint 30 is inserted into the end portion of the inner hose 13, and the inner hose end portion 14 and the inner hose holding portion 31 are caulked and fixed together with the inner collar 34. A plurality of grooves 35 are provided on the outer peripheral surface of the inner hose holding portion 31 along the circumferential direction. Thereby, when the inner hose end 14 and the inner hose holding part 31 are caulked and fixed together with the inner collar 34, the inner peripheral surface of the inner hose end 14 is prevented from being caught in the groove 35 and the inner pipe joint 30 is prevented from falling off. is doing.
[0022]
In the outer hose 11, the outer hose holding portion 21 of the outer pipe joint 20 is inserted into the outer hose end portion 12, and the outer hose end portion 12 and the outer hose holding portion 21 are caulked and fixed together with the outer collar 24. A plurality of grooves 25 are provided on the outer peripheral surface of the outer hose holding portion 21 along the circumferential direction. Thereby, when the outer hose end 12 and the outer hose holding part 21 are caulked and fixed together with the outer collar 24, the inner peripheral surface of the outer hose end 12 is prevented from being caught in the groove 25 and the outer pipe joint 20 being prevented from falling off. is doing.
[0023]
Then, the inner hose 13 in which the inner pipe joint 30 is crimped and held is inserted into the outer hose 11 in which the outer pipe joint 20 is crimped and held so that the holding piece 32 is positioned inside the holding piece holding part 22. The holding piece 32 is held on the inner wall surface of the holding piece holding portion 22 by caulking the outer peripheral surface of the holding piece holding portion 22, and the state shown in FIGS. 2 and 3 is obtained, and the assembly of the flexible hose 1 is completed. .
[0024]
In the present embodiment, when the inner hose holding portion 31 is fixed to the inner hose end portion 14 and when the outer hose fixing portion 21 is fixed to the outer hose end portion 12, the inner collar 34 and the outer collar 24 are used. Although the caulking and fixing method is used, it is also possible to fix the inner hose fixing portion 31 to the inner hose end portion 14 using a band clamp or the like.
[0025]
Therefore, with the above configuration, it is possible to provide a flexible hose having a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other while having a double pipe structure.
[0026]
As another aspect of the present embodiment, joint structures 15a and 15b as shown in FIGS. 4 and 5 can be provided. In the present embodiment as shown in FIG. 2, the joint structure 15 is formed such that the end of the inner connection portion 33 of the inner pipe joint 30 slightly protrudes from the end surface of the outer connection portion 23 of the outer pipe joint 20. In another embodiment as shown in FIG. 4, since the entire inner connection portion 33a is formed so as to protrude from the end surface of the outer connection portion 23a, it is easy to connect the joint structure 15a and the connected member not shown. can do.
[0027]
Moreover, in another aspect as shown in FIG. 5, the total length of the joint structure 15b is shortened and the flexible hose 1 is attached by forming the end face of the inner connecting portion 33b and the end face of the outer connecting portion 23a to coincide with each other. It can be installed even if there is no space in the position.
[0028]
Next, a flexible hose 1 ′ as a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 6 is a sectional view of a flexible hose 1 ′ according to the second embodiment of the present invention.
[0029]
As shown in FIG. 6, the flexible hose 1 ′ of the present embodiment is provided at the outer hose 11 ′, the inner hose 13 ′ inserted into the outer hose 11 ′, and the flexible hose end 2 ′. A joint structure 15 'is provided, and the joint structure 15' includes an inner pipe joint 30 'and an outer pipe joint 20'.
[0030]
The inner pipe joint 30 'extends in the radial direction so that the outer diameter dimension is slightly smaller than the inner connection part 33' coupled to the inner connection part (not shown) and the outer pipe joint 20 'described later. The plurality of holding pieces 32 'and the inner hose holding portion 31' fixed to the end portion of the inner hose 13 'are provided and have a cylindrical shape.
[0031]
The outer pipe joint 20 'includes an outer connection part 23' connected to the outer connection part (not shown), a holding piece holding part 22 'to which the inner pipe joint 30' is fixed, and an end part of the outer hose 11 '. The outer hose holding portion 21 'is fixed to the outer hose holding portion 21' of the outer pipe joint 20 ', and the holding piece holding portion 22' is disposed in the outer hose holding portion 21 '.
[0032]
The inner hose holding portion 31 'of the inner pipe joint 30' is inserted into the end portion of the inner hose 13 ', and the inner hose end portion 14' and the inner hose holding portion 31 'are clamped and held together with the inner collar 34'. Yes. A plurality of grooves 35 ′ are provided along the circumferential direction on the outer peripheral surface of the inner hose holding portion 31 ′. As a result, when the inner hose end portion 14 'and the inner hose holding portion 31' are caulked and fixed together with the inner collar 34 ', the inner peripheral surface of the inner hose end portion 14' is caught by the groove 35 'and the inner pipe joint 30'. Is prevented from falling off.
[0033]
A plurality of grooves 25 ′ are provided on the outer peripheral surface of the outer hose holding part 21 ′ along the circumferential direction. Thereby, when the outer hose end 12 'and the outer hose holding part 21' are caulked and fixed together with the outer collar 24 ', the inner peripheral surface of the outer hose end 12' is caught in the groove 25 'and the outer pipe joint 20'. Is prevented from falling off.
[0034]
The outer hose end 12 'is inserted into the outer collar 24' while the outer hose holding portion 21 'of the outer pipe joint 20' is inserted into the outer hose end 12 '. The inner hose 13 ′ with the inner pipe joint 30 ′ held by crimping is inserted so that the holding piece 32 ′ is positioned inside the outer hose holding part 21 ′ holding piece holding part 22 ′, and the outer hose holding part 21 ′ is held. The outer hose end 12 'and the outer hose holding portion 21' are clamped and held together with the outer collar 24 'by crimping the outer peripheral surface of the piece holding portion 22', and the holding piece is held on the inner wall surface of the holding piece holding portion 22 '. As a result, the assembly of the flexible hose 1 'is completed.
[0035]
In the present embodiment, when the inner hose holding portion 31 ′ is fixed to the inner hose end portion 14 ′ and when the outer hose fixing portion 21 ′ is fixed to the outer hose end portion 12 ′, the inner collar 34 ′, In addition, although the caulking and clamping method is used together with the outer collar 24 ', the inner hose clamping part 31' can be clamped to the inner hose end part 14 'using a band clamp or the like.
[0036]
Therefore, with the above configuration, it is possible to provide a flexible hose having a joint structure in which the central axis of the inner hose and the central axis of the outer hose coincide with each other while having a double pipe structure.
[0037]
Further, by assembling the outer pipe joint outer peripheral surface to the end portion of the outer hose, the holding piece of the inner pipe joint can be firmly held, thereby reducing the assembly man-hours.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state where an inner hose is inserted into an outer hose in the flexible hose according to the first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a completed state of the flexible hose according to the first embodiment of the present invention.
FIG. 3 is a view of the flexible hose according to the first embodiment of the present invention as viewed from the end surface side.
FIG. 4 is a perspective view showing another aspect of the joint structure portion of the first embodiment of the present invention.
FIG. 5 is a perspective view showing another aspect of the joint structure portion of the first embodiment of the present invention.
FIG. 6 is a cross-sectional view of a flexible hose according to a second embodiment of the present invention.
[Explanation of symbols]
1 ... flexible hose 2 ... flexible hose end (end)
DESCRIPTION OF SYMBOLS 11 ... Outer hose 12 ... Inner hose 15 ... Joint structure 20 ... Outer pipe joint 21 ... Outer hose holding part 22 ... Holding piece holding part 23 ... Outer connection part 30 ... Inner pipe joint 31 ... Inner hose holding part 32 ... Holding piece 33 ... Inner connection

Claims (3)

車両用冷凍サイクルの冷媒用通路として使用され、外側ホース（１１）と、この外側ホース（１１）内部に挿入される内側ホース（１３）と、端部（２）に設けられた継ぎ手構造（１５）とを備えたフレキシブルホース（１）であって、
外側ホース（１１）端部に配設される外管継ぎ手（２０）と内側ホース（１３）端部に配設される内管継ぎ手（３０）とからなり、
筒形状を備え、周上に溝を有する内側接続部（３３）と、該外管継ぎ手（２０）内径よりも外径寸法がわずかに小さくなるように半径方向に延設された複数の保持片（３２）と、内側ホース（１３）の端部に固持される内側ホース固持部（３１）とを具備し、該周上の溝に装着されるシール用Ｏリングによって該内側接続部（３３）が被内側接続部に密着接続される該内管継ぎ手（３０）と、
筒形状を備え、周方向に溝を有する外側接続部（２３）と、該内管継ぎ手（３０）が固持される保持片固持部（２２）と、外側ホース（１１）の端部に固持される外側ホース固持部（２１）とを具備し、該周上の溝に装着されるシール用Ｏリングによって該外側接続部（２３）が被外側接続部に密着接続される該外管継ぎ手（２０）とから前記継ぎ手構造（１５）が構成され、
該外側ホース（１１）端部に固持された外管継ぎ手（２０）内部に、該内側ホース（１３）端部に固持された内管継ぎ手（３０）が挿入され、該保持片固持部（２２）の外周面が加締められることで該保持片固持部（２２）内壁面に該保持片（３２）が固持されていることを特徴とするフレキシブルホース。Used as a refrigerant passage in a vehicle refrigeration cycle, an outer hose (11), an inner hose (13) inserted into the outer hose (11), and a joint structure (15) provided at the end (2) A flexible hose (1) comprising:
An outer pipe joint (20) disposed at the end of the outer hose (11) and an inner pipe joint (30) disposed at the end of the inner hose (13);
An inner connection portion (33) having a cylindrical shape and having a groove on the circumference, and a plurality of holding pieces extending in the radial direction so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint (20) (32) and an inner hose holding part (31) fixed to the end of the inner hose (13), and the inner connection part (33) by an O-ring for sealing attached to the groove on the circumference. The inner pipe joint (30) that is closely connected to the inner connection part;
An outer connection portion (23) having a cylindrical shape and having a groove in the circumferential direction, a holding piece holding portion (22) to which the inner pipe joint (30) is fixed, and an end portion of the outer hose (11) An outer hose holding part (21), and the outer pipe joint (20) in which the outer connection part (23) is tightly connected to the outer connection part by a sealing O-ring attached to the groove on the circumference. ) To form the joint structure (15),
An inner pipe joint (30) held at the end of the inner hose (13) is inserted into the outer pipe joint (20) held at the end of the outer hose (11), and the holding piece holding part (22 ), The holding piece (32) is fixed to the inner wall surface of the holding piece holding portion (22). 車両用冷凍サイクルの冷媒用通路として使用され、外側ホース（１１）と、この外側ホース（１１）内部に挿入される内側ホース（１３）と、端部（２）に設けられた継ぎ手構造（１５）とを備えたフレキシブルホース（１）であって、
外側ホース（１１）端部に配設される外管継ぎ手（２０）と内側ホース（１３）端部に配設される内管継ぎ手（３０）とからなり、
被内側接続部に連結される内側接続部（３３）と、該外管継ぎ手（２０）内径よりも外径寸法がわずかに小さくなるように半径方向に延設された複数の保持片（３２）と、内側ホース（１３）の端部に固持される内側ホース固持部（３１）とを具備し、筒形状を備えた内管継ぎ手（３０）と、
被外側接続部に連結される外側接続部（２３）と、該内管継ぎ手（３０）が固持される保持片固持部（２２）と、外側ホース（１１）の端部に固持される外側ホース固持部（２１）とを具備し、筒形状を備えた外管継ぎ手（２０）とから前記継ぎ手構造（１５）が構成され、
該外側ホース固持部（２１）に該保持片固持部（２２）が配設され、
該外側ホース（１１）端部に固持された外管継ぎ手（２０）内部に、該内側ホース（１３）端部に固持された内管継ぎ手（３０）が挿入され、
該外側ホース固持部（２１）の外周面を加締めることで該保持片固持部（２２）内壁面に該保持片（３２）が固持されることを特徴とするフレキシブルホース。Used as a refrigerant passage in a vehicle refrigeration cycle, an outer hose (11), an inner hose (13) inserted into the outer hose (11), and a joint structure (15) provided at the end (2) A flexible hose (1) comprising:
An outer pipe joint (20) disposed at the end of the outer hose (11) and an inner pipe joint (30) disposed at the end of the inner hose (13);
An inner connection part (33) coupled to the inner-side connection part, and a plurality of holding pieces (32) extending radially so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint (20) And an inner hose holding portion (31) to be held on the end of the inner hose (13), and an inner pipe joint (30) having a cylindrical shape,
An outer connection portion (23) coupled to the outer connection portion, a holding piece holding portion (22) to which the inner pipe joint (30) is fixed, and an outer hose to be fixed to the end of the outer hose (11) The joint structure (15) is composed of an outer pipe joint (20) having a holding part (21) and having a cylindrical shape,
The holding piece holding portion (22) is disposed on the outer hose holding portion (21),
The inner pipe joint (30) held at the end of the inner hose (13) is inserted into the outer pipe joint (20) held at the end of the outer hose (11) ,
A flexible hose characterized in that the holding piece (32) is fixed to the inner wall surface of the holding piece holding section (22) by caulking the outer peripheral surface of the outer hose holding section (21). 内側ホース（１３）の端部に筒形状を備えた内管継ぎ手（３０）に具備された内側ホース固持部（３１）を固持し、
外側ホース（１１）に内側ホース（１３）を挿入し、
外側ホース（１１）の端部に筒形状を備えた外管継ぎ手（２０）の外周面を加締めることで、外側ホース（１１）端部に外側ホース固持部（２１）を固持しつつ、該外管継ぎ手（２０）に具備された該保持片固持部（２２）内壁面に、該外管継ぎ手（２０）内径よりも外径寸法がわずかに小さくなるように内管継ぎ手（３０）の半径方向に延設された複数の保持片（３２）を固持することを特徴とするフレキシブルホースの製造方法。The inner hose holding portion (31) provided in the inner pipe joint (30) having a cylindrical shape at the end of the inner hose (13) is fixed,
Insert the inner hose (13) into the outer hose (11),
By crimping the outer peripheral surface of the outer pipe joint (20) having a cylindrical shape at the end of the outer hose (11), the outer hose holding part (21) is held at the end of the outer hose (11), The radius of the inner pipe joint (30) so that the outer diameter dimension is slightly smaller than the inner diameter of the outer pipe joint (20) on the inner wall surface of the holding piece holding portion (22) provided in the outer pipe joint (20). A method for manufacturing a flexible hose characterized by holding a plurality of holding pieces (32) extending in a direction.
JP2002378669A 2002-12-26 2002-12-26 Flexible hose and method for manufacturing flexible hose Expired - Fee Related JP4270860B2 (en)

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JP2002378669A JP4270860B2 (en) 2002-12-26 2002-12-26 Flexible hose and method for manufacturing flexible hose
EP03029626A EP1433990A1 (en) 2002-12-26 2003-12-22 Flexible hose
US10/743,490 US7000644B2 (en) 2002-12-26 2003-12-23 Flexible hose

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JP4819579B2 (en) * 2006-06-01 2011-11-24 未来工業株式会社 Connection structure of double pipe to joint
JP5556624B2 (en) * 2010-11-29 2014-07-23 株式会社デンソー Piping joint
JP5342724B2 (en) * 2011-03-17 2013-11-13 未来工業株式会社 Connection structure and connection method of double pipe to joint
CN205013928U (en) * 2015-08-24 2016-02-03 厦门建霖工业有限公司 Fast tying of guan zhongguan constructs
CN110242803A (en) * 2019-07-11 2019-09-17 厦门三骏工贸有限公司 Multichannel hose
CN115978313A (en) * 2022-12-08 2023-04-18 上海高仙自动化科技发展有限公司 Water pipe assembly and cleaning robot

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