JP2004100765A - Hose welding connection structure - Google Patents

Hose welding connection structure Download PDF

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Publication number
JP2004100765A
JP2004100765A JP2002261439A JP2002261439A JP2004100765A JP 2004100765 A JP2004100765 A JP 2004100765A JP 2002261439 A JP2002261439 A JP 2002261439A JP 2002261439 A JP2002261439 A JP 2002261439A JP 2004100765 A JP2004100765 A JP 2004100765A
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JP
Japan
Prior art keywords
hose
joint
face
inclined surfaces
peripheral corner
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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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JP2002261439A
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Japanese (ja)
Inventor
Koji Horiichi
堀一　耕二
Tsutomu Shimazaki
島崎　勉
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Toyox Co Ltd
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Toyox Co Ltd
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Application filed by Toyox Co Ltd filed Critical Toyox Co Ltd
Priority to JP2002261439A priority Critical patent/JP2004100765A/en
Publication of JP2004100765A publication Critical patent/JP2004100765A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0672—Spin welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/069—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding the welding tool cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To surely weld an easily deformable soft synthetic resin hose with a joint by precisely positioning them. <P>SOLUTION: The outer circumferential corner part 1b and the inner circumferential corner part 1c of the end face 1a of the soft synthetic resin hose 1 are made to abut on a pair of slope surfaces 2b and 2c circumferentially provided in the joining side of a joint, so that the outer circumferential corner part 1b and the inner circumferential corner part 1c of the hose end face 1a are clamped between the both slope surfaces 2b and 2c and the hose end face 1a becomes a perfect circle without being deformed and relieved and annularly press-contacted to each other. When only either one of the hose 1 or the joint 2 is rotated in their press-contacted state, the outer circumferential corner part 1b and the inner circumferential corner part 1c press-contacted annularly and the both slope surfaces 2b and 2c are frictionally melted and inner/outer doubly connected by welding. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、継手に可撓性ホースをスピン溶着（回転溶着、摩擦溶融接合）によって一体化させるホース溶着接続構造に関する。
詳しくは、熱可塑性樹脂製の管と熱可塑性樹脂製の継手との端面同士を突き合わせて圧接しながら、これら管及び継手のどちらか一方を他方に対して回転させることにより、これら接触部分に発生する摩擦熱で両者の熱可塑性樹脂が軟化溶融して溶着接合させるホース溶着接続構造に関する。
【０００２】
【従来の技術】
従来、この種のホース溶着接続構造は、合成樹脂管と合成樹脂製継手の端面（接着面）を予めテーパーに加工することにより、両者の接着面積を大きくすると共に、これら管と継手の端面（接着面）を同一軸心上で相対向させて保持し、圧接しながら継手を軸心の廻りに回転させることにより、合成樹脂管が溶融流動温度以上に加熱され、その後、継手の回転を停止し、更に圧着を強くして静止放冷すると、溶着部が完全に固化し接着される（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特開昭５０−１５１２７５号公報（第１−２頁、図１、図２）
【０００４】
【発明が解決しようとする課題】
しかし乍ら、このような従来のホース溶着接続構造では、合成樹脂管の材質が変形し難い硬質合成樹脂製であれば、合成樹脂管と継手の端面同士を突き合わせて圧接しても、該合成樹脂管の変形を考慮することなく継手と溶着接合できるが、管が変形し易い軟質合成樹脂製のホースである場合には、該ホースの端面を継手の端面に突き合わせて強く圧接すると、ホースの端面が変形して継手の端面から逃げてしまい、これら両者の端面同士を正確に位置合わせして溶着接合させることが困難であるという問題がある。
【０００５】
本発明のうち請求項１記載の発明は、変形し易い軟質合成樹脂製ホースと継手を正確に位置合わせして確実に溶着することを目的としたものである。
請求項２記載の発明は、請求項１に記載の発明の目的に加えて、ホースが積層ホースであっても端面から中間層へ流体が浸入するを防止することを目的としたものである。
請求項３記載の発明は、請求項２に記載の発明の目的に加えて、溶融ガスの充満によって溶融接合部分に孔が開くのを防止することを目的としたものである。
【０００６】
【課題を解決するための手段】
前述した目的を達成するために、本発明のうち請求項１記載の発明は、管１が変形し易い軟質合成樹脂製のホースであり、継手２を硬質合成樹脂製とすると共にその接合側に、該ホース１の端面１ａの外周角部１ｂ及び内周角部１ｃと対向する一対の傾斜面２ｂ，２ｃを夫々周設し、これら傾斜面２ｂ，２ｃに上記ホース端面１ａの外周角部１ｂ及び内周角部１ｃを夫々全周に亘り突き当てて環状に圧接しながら、ホース１及び継手２のどちらか一方のみを回転させたことを特徴とするものである。
請求項２記載の発明は、請求項１記載の発明の構成に、前記継手２の接合側に、ホース１の端面１ａが嵌入する環状凹部２ａを凹設し、この環状凹部２ａの内面に一対の傾斜面２ｂ，２ｃを断面略Ｖ字形に対向するように周設した構成を加えたことを特徴とする。
請求項３記載の発明は、請求項２記載の発明の構成に、前記環状凹部２ａにガス抜き孔２ｄを、一対の傾斜面２ｂ，２ｃの間に位置するように開穿した構成を加えたことを特徴とする。
【０００７】
【作用】
請求項１の発明は、継手２の接合側に周設された一対の傾斜面２ｂ，２ｃに対して、軟質合成樹脂製ホース１の端面１ａの外周角部１ｂ及び内周角部１ｃを突き当てることにより、これらホース端面１ａの外周角部１ｂ及び内周角部１ｃが両傾斜面２ｂ，２ｃの間に挟み込まれて、該ホース端面１ａが変形して逃げることなく真円となって夫々環状に圧接し、この圧接状態でホース１及び継手２のどちらか一方のみを回転すれば、環状に圧接する外周角部１ｂ及び内周角部１ｃと両傾斜面２ｂ，２ｃが摩擦溶融して内外二重に溶着接合されるものである。
請求項２の発明は、請求項１記載の構成に対して、前記継手２の接合側に、ホース１の端面１ａが嵌入する環状凹部２ａを凹設し、この環状凹部２ａの内面に一対の傾斜面２ｂ，２ｃを断面略Ｖ字形に対向するように周設した構成を追加したので、継手２の環状凹部２ａの内面に周設した断面略Ｖ字形に対向する一対の傾斜面２ｂ，２ｃに対し、ホース端面１ａの外周角部１ｂ及び内周角部１ｃを摩擦溶融して内外二重に溶着接合することにより、ホース端面１ａが環状凹部２ａの内面で覆われて密閉される。
請求項３の発明は、請求項２記載の構成に対して、前記環状凹部２ａにガス抜き孔２ｄを、一対の傾斜面２ｂ，２ｃの間に位置するように開穿した構成を追加したので、ホース端面１ａの外周角部１ｂ及び内周角部１ｃと傾斜面２ｂ，２ｃとの摩擦によって熱可塑性樹脂が溶融した時に発生したガスは、ガス抜き孔２ｄを通って環状凹部２ａの外へ排出される。
【０００８】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて説明する。
この実施例は、図１〜図２に示す如く、熱可塑性樹脂製の管１として軟質合成樹脂製の積層ホースを使用すると共に、熱可塑性樹脂製の継手２として、円筒形状の継手本体２１と他の機器に接続するための接続筒２２とが一体化されたものを使用し、この継手２の接合側に上記ホース１の端面１ａを突き合わせて圧接しながら、継手２側のみを回転させてスピン溶着（回転溶着、摩擦溶融接合）した場合を示すものである。
【０００９】
上記ホース１は、例えば軟質塩化ビニールやポリウレタンなどの変形し易い軟質合成樹脂で円筒形に形成され、図示例の場合には、透明又は不透明な外層１１と内層１２との間に中間層として複数本か又は単数本の合成樹脂製ブレード（補強糸）１３が螺旋状に巻き付け一体化された積層ホース（ブレードホース）である場合を示している。
また、このホース１の端面１ａは、例えばカッターやハサミなどで該ホース１の軸線方向と直交させて同一平面上に切断することが好ましい。
【００１０】
上記継手２は、例えばポリ塩化ビニールなどの硬質合成樹脂で円筒形に形成され、図示例の場合には、上記ホース１がスピン溶着される継手本体２１の外周に接続筒２２を嵌合し、これら継手本体２１と接続筒２２の間には、例えばＯリングなどのシール材２３と、例えばＣ形リングなどの抜け止め２４を介装することにより、回転自在で密閉状に連結しているが、これに限定されず、これら継手本体２１及び接続筒２２が一体成形したものを使用しても良い。
【００１１】
上記接続筒２２の外周面には、他の機器に接続するためのネジ部２５とナット部２６を一体成形し、接続する機器のサイズに対応してネジ部２５の径サイズや形状の異なるものを予め複数種類用意しておき、接続先に合った接続筒２２を選択して継手本体２１に連結することにより、継手本体２１を共通部品化しても良い。
【００１２】
更に、上記継手２の接合側には、上記ホース１の端面１ａを嵌入するための環状凹部２ａが凹設され、この環状凹部２ａの内面に、該ホース端面１ａの外周角部１ｂ及び内周角部１ｃと対向して交差する一対の傾斜面２ｂ，２ｃを夫々周設し、これら傾斜面２ｂ，２ｃにホース端面１ａの外周角部１ｂ及び内周角部１ｃを夫々全周に亘り突き当てて環状に圧接させる。
【００１３】
本実施例の場合には、上記継手本体２１の接合側端面に環状凹部２ａを、その開口側の内外径がホース１の外径より若干大きくなると共にホース１の内径より若干小さくなるように凹設し、一対の傾斜面２ｂ，２ｃを該環状凹部２ａの開口側から奥側へ向かうのに従って両者の径方向間隔が徐々に狭くなるように夫々テーパー状に周設することにより断面略Ｖ字形に対向させ、これら傾斜面２ｂ，２ｃの先端側延長部分を断面円弧状に連結したが、これに限定されず、それ以外の形状で連結しても良い。
【００１４】
また、上記環状凹部２ａには、摩擦によって熱可塑性樹脂が溶融した時に発生したガスを抜くためのガス抜き孔２ｄが、一対の傾斜面２ｂ，２ｃの間に位置するように開穿され、このガス抜き孔２ｄの内径を摩擦溶融により流れ出る熱可塑性樹脂で埋まるように設定する。
【００１５】
本実施例の場合には、上記傾斜面２ｂ，２ｃの先端側に位置する断面円弧状の連結部分にガス抜き孔２ｄを複数個、図示例では図２に示す如く４個、周方向へ等間隔毎に開穿している。
【００１６】
そして、前記継手２の環状凹部２ａ内に、上記ホース１の端面１ａを差し込み、その外周角部１ｂ及び内周角部１ｃを一対の傾斜面２ｂ，２ｃに夫々突き当てた状態で、本実施例の場合には継手２側のみを回転させる。
図示例の場合には、この環状凹部２ａが凹設された継手本体２１を、例えばチャック爪などの回転可能な保持手段３により締め付け保持し、該回転保持手段３の回転駆動によって継手本体２１を所定速度で回転移動させている。
【００１７】
次に、斯かるホース溶着接続構造の接続方法を手順に従って説明する。
先ず、図１（ａ）に示す如く、継手２の環状凹部２ａ内に、軟質合成樹脂製ホース１の端面１ａを差し込み、その外周角部１ｂ及び内周角部１ｃを一対の傾斜面２ｂ，２ｃに突き当てる。
【００１８】
それにより、これらホース端面１ａの外周角部１ｂ及び内周角部１ｃが両傾斜面２ｂ，２ｃの間に挟み込まれて案内され、該ホース端面１ａが変形して逃げることなく真円に矯正されながら夫々環状に圧接し、更にホース端面１ａを強く押して圧接させても両傾斜面２ｂ，２ｃの間から変形して逃げ出ることはない。
【００１９】
この際、ホース１の端面１ａが該ホース１の軸線方向と直交させて同一平面上に切断できなかった場合でも、外周角部１ｂ及び内周角部１ｃに向けてホース端面１ａを押し込むだけで、これら外周角部１ｂ及び内周角部１ｃの部分的に突出した部分は、両傾斜面２ｂ，２ｃに夫々突き当たって圧縮されるか、又は逃げる方向へ変形し、それにより夫々環状に圧接する。
【００２０】
そして、この圧接状態で、ホース１側を回転不能に固定支持しながら継手２側のみを回転させれば、これら環状に圧接する外周角部１ｂ及び内周角部１ｃと傾斜面２ｂ，２ｃとの接触部分が摩擦して摩擦熱が発生する。
【００２１】
この摩擦熱によってホース１と継手２の熱可塑性樹脂が軟化溶融した状態になったら、ホース端面１ａを所定幅、例えば約１〜２ｍｍ程度、押し込んで更に圧接させる。
【００２２】
その所定時間後、図１（ｂ）に示す如く、継手２側のみの回転を停止させ、このまま上記軟化溶融した部分が静止放冷されると、環状に圧接する外周角部１ｂ及び内周角部１ｃと両傾斜面２ｂ，２ｃが内外二重に溶着接合されて、溶着接合が終了する。
【００２３】
その結果、変形し易い軟質合成樹脂製ホース１と継手２を正確に位置合わせして確実に溶着できる。
【００２４】
更に本実施例の場合には、継手２の環状凹部２ａの内面に周設した断面略Ｖ字形に対向する一対の傾斜面２ｂ，２ｃに対し、ホース端面１ａの外周角部１ｂ及び内周角部１ｃを摩擦溶融して内外二重に溶着接合したから、ホース端面１ａが環状凹部２ａの内面で覆われて密閉される。
その結果、ホース１が積層ホースであっても端面１ａから中間層へ例えば水などの流体が浸入するを防止できる。
【００２５】
また、ホース端面１ａの外周角部１ｂ及び内周角部１ｃと傾斜面２ｂ，２ｃとの摩擦によって熱可塑性樹脂が溶融した時に発生したガスは、ガス抜き孔２ｄを通って環状凹部２ａの外へ排出され、その溶融が進行してホース端面１ａと環状凹部２ａが完全に溶着接合可能な頃には、溶融した熱可塑性樹脂によりガス抜き孔２ｄが埋まって、溶融ガスが環状凹部２ａ内に充満しない。
その結果、溶融ガスの充満によって溶融接合部分に孔が開くのを防止できる。
【００２６】
一方、図３〜図６に示すものは、本発明の他の実施例であり、このものは、前記熱可塑性樹脂製の継手２として、上記環状凹部２ａが凹設された接合側と反対側の非接合側に、回転治具４の係合突起４ａと回転不能に係止する係合溝２９を凹設した継手本体２７，２８を使用し、これら継手本体２７，２８の環状凹部２ａにホース１の端面１ａを突き合わせて圧接しながら、上記回転治具４で継手２側のみを回転させてスピン溶着（回転溶着、摩擦溶融接合）した構成が、前記図１〜図２に示した実施例とは異なり、それ以外の構成は図１〜図２に示した実施例と同じものである。
【００２７】
更に詳しく説明すれば、図３及び図４に示すものは、シャワーヘッド側の継手本体２７であり、図５及び図６に示すものは、水栓側の継手本体２８であり、これらシャワーヘッド側の継手本体２７と水栓側の継手本体２８を、ホース１の両端に溶着接合することによって、シャワーホースセット品が作製される場合を示している。
【００２８】
このようなホース溶着接続構造の接続方法は、図３（ａ）及び図５（ａ）に示す如く、継手本体２７，２８に上記回転治具４の中心軸４ｂを嵌挿すると共に複数の係合突起４ａ…を係合溝２９…に回転不能に係止して継手２側のみを回転しながら、ホース端面１ａを押し込んで更に圧接させ、その所定時間後に図３（ｂ）及び図５（ｂ）に示す如く、回転停止して静止放冷すれば、前記図１（ａ）（ｂ）に示した実施例と同様に、ホース１の両端面１ａ，１ａにシャワーヘッド側の継手本体２７と水栓側の継手本体２８が別個に溶着接合される。
【００２９】
尚、前示実施例では、継手２の接合側にホース１の端面１ａを突き合わせて圧接しながら、継手２側のみを回転させてスピン溶着した場合を示したが、これに限定されず、変形し易い軟質合成樹脂製ホース１を屈曲することなく回転できれば、継手２側を固定支持してホース１側のみを回転させてスピン溶着しても良い。
【００３０】
更に、前記ホース１は、上述した積層ホース（ブレードホース）に限定されず、図示せぬが不透明な内層と透明な外層との間に中間層として、少なくとも表面が金属色に光る断面矩形の帯状補強材と、断面円形の線状補強材を螺旋状に巻き付けて一体化した螺旋補強ホース（フォーランホース）であったり、それに以外に中間層として断面矩形の帯状補強材及び断面円形の線状補強材のどちらか一方のみを巻き付けて一体化したり、例えばガラス繊維や難燃性繊維などの糸状補強材を編組したり、螺旋状に巻き付けて一体化したり、金属製線材を螺旋状に埋設したスプリングホースなどの従来周知の軟質ホースか、或いは単層構造の軟質合成樹脂製ホース又はそれより小径なチューブであっても同様な作用効果が得られる。
【００３１】
【発明の効果】
以上説明したように、本発明のうち請求項１記載の発明は、継手２の接合側に周設された一対の傾斜面２ｂ，２ｃに対して、軟質合成樹脂製ホース１の端面１ａの外周角部１ｂ及び内周角部１ｃを突き当てることにより、これらホース端面１ａの外周角部１ｂ及び内周角部１ｃが両傾斜面２ｂ，２ｃの間に挟み込まれて、該ホース端面１ａが変形して逃げることなく真円となって夫々環状に圧接し、この圧接状態でホース１及び継手２のどちらか一方のみを回転すれば、環状に圧接する外周角部１ｂ及び内周角部１ｃと両傾斜面２ｂ，２ｃが摩擦溶融して内外二重に溶着接合されるので、変形し易い軟質合成樹脂製ホース１と継手２を正確に位置合わせして確実に溶着できる。
従って、ホースの端面を継手の端面に突き合わせて強く圧接すると、簡単に変形して両者の端面同士を正確に突き合わせて溶着接合することが困難な従来のものに比べ、ホース端面の変形を防止するための特別な保持機構を使用しなくとも溶着接合できて、ホース溶着接続コストの低減化が図れる。
【００３２】
請求項２の発明は、請求項１の発明の効果に加えて、継手２の環状凹部２ａの内面に周設した断面略Ｖ字形に対向する一対の傾斜面２ｂ，２ｃに対し、ホース端面１ａの外周角部１ｂ及び内周角部１ｃを摩擦溶融して内外二重に溶着接合することにより、ホース端面１ａが環状凹部２ａの内面で覆われて密閉されるので、ホース１が積層ホースであっても端面１ａから中間層へ流体が浸入するを防止できる。
従って、積層ホースが剥離したり劣化せず、その寿命を延ばすことができる。
【００３３】
請求項３の発明は、請求項２の発明の効果に加えて、ホース端面１ａの外周角部１ｂ及び内周角部１ｃと傾斜面２ｂ，２ｃとの摩擦によって熱可塑性樹脂が溶融した時に発生したガスは、ガス抜き孔２ｄを通って環状凹部２ａの外へ排出されるので、溶融ガスの充満によって溶融接合部分に孔が開くのを防止できる。
従って、溶着部分から流体の漏れが発生しない。
【図面の簡単な説明】
【図１】本発明の一実施例を示すホース溶着接続構造の縦断正面図であり、（ａ）は溶着接合前の状態を示し、（ｂ）は溶着接合した状態を示している。
【図２】図１（ａ）の（２）−（２）線に沿える部分拡大縦断側面図である。
【図３】本発明の他の実施例を示すホース溶着接続構造の縦断正面図であり、（ａ）は溶着接合前の状態を示し、（ｂ）は溶着接合した状態を示している。
【図４】図３（ａ）の（４）−（４）線に沿える部分拡大縦断側面図である。　　装置の部分的な縮小縦断正面図である。
【図５】本発明の他の実施例を示すホース溶着接続構造の縦断正面図であり、（ａ）は溶着接合前の状態を示し、（ｂ）は溶着接合した状態を示している。
【図６】図５（ａ）の（６）−（６）線に沿える部分拡大縦断側面図である。
【符号の説明】
１　管、軟質合成樹脂製のホース　　　　１ａ　端面
１ｂ　外周角部　　　　　　　　　　　　１ｃ　内周角部
２　継手　　　　　　　　　　　　　　　２ａ　環状凹部
２ｂ　傾斜面　　　　　　　　　　　　　２ｃ　傾斜面
２ｄ　ガス抜き孔[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hose welding connection structure in which a flexible hose is integrated with a joint by spin welding (rotary welding, friction welding).
Specifically, while the end faces of the thermoplastic resin pipe and the thermoplastic resin joint are pressed against each other and pressed against each other, one of these pipes and the joint is rotated with respect to the other, so that the contact portion is generated. The present invention relates to a hose welding connection structure in which both thermoplastic resins are softened and melted by frictional heat generated and welded and joined.
[0002]
[Prior art]
Conventionally, this type of hose welded connection structure has a tapered end surface (adhesion surface) of a synthetic resin pipe and a synthetic resin joint, thereby increasing the adhesion area between the two, and also has an end surface (end surface) of the tube and the joint. The synthetic resin tube is heated above the melt flow temperature by holding the joint surfaces) facing each other on the same axis and rotating the joint around the axis while pressing and pressing, and then stops the joint rotation. Then, when the crimping is further strengthened and allowed to stand still, the welded portion is completely solidified and bonded (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-50-151275 (page 1-2, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
However, in such a conventional hose welding connection structure, if the synthetic resin tube is made of a hard synthetic resin which is not easily deformed, even if the end surfaces of the synthetic resin tube and the joint are brought into contact with each other and pressed against each other, the synthetic resin tube can be connected to the joint. It can be welded to the joint without considering the deformation of the resin tube, but if the tube is a soft synthetic resin hose that is easily deformed, the end face of the hose should be pressed against the end surface of the joint and strongly pressed against The end face is deformed and escapes from the end face of the joint, and there is a problem that it is difficult to accurately align the two end faces and weld them together.
[0005]
An object of the present invention is to accurately align a hose and a joint made of a soft synthetic resin, which are easily deformed, and to reliably weld them.
The invention described in claim 2 aims at preventing the fluid from entering the intermediate layer from the end face even if the hose is a laminated hose, in addition to the object of the invention described in claim 1.
A third aspect of the present invention has the object of preventing, in addition to the object of the second aspect, a hole from being opened in a fusion bonding portion due to the filling of a molten gas.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, an invention according to claim 1 of the present invention is a hose made of a soft synthetic resin in which the pipe 1 is easily deformed. A pair of inclined surfaces 2b, 2c facing the outer peripheral corner 1b and the inner peripheral corner 1c of the end surface 1a of the hose 1 are respectively provided around the outer peripheral corner 1b of the hose end surface 1a on these inclined surfaces 2b, 2c. And one of the hose 1 and the joint 2 is rotated while abutting the inner peripheral corner 1c over the entire circumference and pressing in an annular manner.
According to a second aspect of the present invention, in the configuration of the first aspect, an annular concave portion 2a into which the end face 1a of the hose 1 is fitted is formed on the joint side of the joint 2, and a pair of inner surfaces of the annular concave portion 2a are provided. Is characterized in that the inclined surfaces 2b and 2c are provided so as to face each other in a substantially V-shaped cross section.
A third aspect of the present invention is configured such that a gas vent hole 2d is formed in the annular concave portion 2a so as to be located between the pair of inclined surfaces 2b and 2c, in addition to the configuration of the second aspect of the present invention. It is characterized by the following.
[0007]
[Action]
According to the first aspect of the invention, the outer peripheral corner 1b and the inner peripheral corner 1c of the end surface 1a of the soft synthetic resin hose 1 protrude against a pair of inclined surfaces 2b, 2c provided on the joint side of the joint 2. The outer peripheral corner 1b and the inner peripheral corner 1c of the hose end surface 1a are sandwiched between the inclined surfaces 2b, 2c, so that the hose end surface 1a is deformed and becomes a perfect circle without escape. If only one of the hose 1 and the joint 2 is rotated in this annularly pressed state, the outer peripheral corner 1b and the inner peripheral corner 1c and the two inclined surfaces 2b, 2c that are annularly pressed are frictionally fused. It is welded and welded inside and outside.
According to the second aspect of the present invention, an annular concave portion 2a into which the end surface 1a of the hose 1 is fitted is provided on the joint side of the joint 2 with respect to the configuration of the first embodiment, and a pair of inner surfaces of the annular concave portion 2a are provided. Since the configuration in which the inclined surfaces 2b and 2c are provided so as to oppose the substantially V-shaped cross section is added, a pair of inclined surfaces 2b and 2c which are provided on the inner surface of the annular concave portion 2a of the joint 2 and oppose the substantially V-shaped cross section. On the other hand, the outer peripheral corner 1b and the inner peripheral corner 1c of the hose end face 1a are friction-fused and welded and joined in an inner and outer manner, whereby the hose end face 1a is covered with the inner surface of the annular concave portion 2a and hermetically sealed.
The third aspect of the present invention is different from the second aspect in that a gas vent hole 2d is formed in the annular concave portion 2a so as to be located between the pair of inclined surfaces 2b and 2c. The gas generated when the thermoplastic resin is melted by friction between the outer peripheral corner 1b and the inner peripheral corner 1c of the hose end surface 1a and the inclined surfaces 2b, 2c passes through the gas vent hole 2d to the outside of the annular concave portion 2a. Is discharged.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, this embodiment uses a laminated hose made of a soft synthetic resin as a thermoplastic resin tube 1 and a cylindrical joint body 21 as a thermoplastic resin joint 2. By using the one in which a connection tube 22 for connecting to another device is integrated, and by pressing the end surface 1a of the hose 1 against the joint side of the joint 2 and pressing the joint, only the joint 2 side is rotated. This shows a case where spin welding (rotary welding, friction fusion welding) is performed.
[0009]
The hose 1 is formed of a flexible synthetic resin such as soft vinyl chloride or polyurethane which is easily deformed and has a cylindrical shape. In the illustrated example, a plurality of intermediate layers are provided between the transparent or opaque outer layer 11 and the inner layer 12. One or a single synthetic resin blade (reinforcing thread) 13 is a spirally wound laminated hose (blade hose).
Further, it is preferable that the end surface 1a of the hose 1 is cut on the same plane with a cutter, scissors, or the like so as to be orthogonal to the axial direction of the hose 1.
[0010]
The joint 2 is formed of a hard synthetic resin such as polyvinyl chloride into a cylindrical shape, and in the case of the illustrated example, a connection tube 22 is fitted to the outer periphery of a joint body 21 to which the hose 1 is spin-welded. Between the joint body 21 and the connection tube 22, a seal member 23 such as an O-ring and a stopper 24 such as a C-ring are interposed to be rotatably and hermetically connected. However, the present invention is not limited to this, and the joint body 21 and the connection tube 22 may be integrally formed.
[0011]
A screw portion 25 and a nut portion 26 for connecting to another device are integrally formed on the outer peripheral surface of the connection tube 22, and the diameter and shape of the screw portion 25 differ according to the size of the device to be connected. May be prepared in advance, and the joint body 21 may be made into a common part by selecting the connection tube 22 that matches the connection destination and connecting the joint tube 21 to the joint body 21.
[0012]
Further, an annular concave portion 2a for fitting the end surface 1a of the hose 1 is provided on the joint side of the joint 2, and an outer peripheral corner 1b and an inner peripheral surface of the hose end surface 1a are formed on the inner surface of the annular concave portion 2a. A pair of inclined surfaces 2b and 2c intersecting and intersecting with the corner portion 1c are respectively provided around the outer peripheral corner portion 1b and the inner peripheral corner portion 1c of the hose end surface 1a. Press and make annular contact.
[0013]
In the case of the present embodiment, an annular concave portion 2a is formed in the joint-side end surface of the joint body 21 so that the inner and outer diameters on the opening side are slightly larger than the outer diameter of the hose 1 and slightly smaller than the inner diameter of the hose 1. And a pair of inclined surfaces 2b, 2c are tapered so as to gradually narrow the radial distance between the two from the opening side of the annular concave portion 2a toward the inner side thereof, thereby forming a substantially V-shaped cross section. Although the front-end-side extended portions of the inclined surfaces 2b and 2c are connected to each other in an arc-shaped cross section, the present invention is not limited to this, and they may be connected in other shapes.
[0014]
In the annular concave portion 2a, a gas vent hole 2d for venting gas generated when the thermoplastic resin is melted by friction is formed so as to be located between the pair of inclined surfaces 2b and 2c. The inner diameter of the gas vent hole 2d is set so as to be filled with the thermoplastic resin flowing out by friction melting.
[0015]
In the case of the present embodiment, a plurality of gas vent holes 2d are provided at the connecting portion having an arc-shaped cross section located at the tip end side of the inclined surfaces 2b and 2c, four in the illustrated example as shown in FIG. Drilled at intervals.
[0016]
Then, the end face 1a of the hose 1 is inserted into the annular concave portion 2a of the joint 2, and the outer peripheral corner 1b and the inner peripheral corner 1c are respectively brought into contact with the pair of inclined surfaces 2b, 2c. In the case of the example, only the joint 2 is rotated.
In the case of the illustrated example, the joint main body 21 in which the annular concave portion 2a is provided is fastened and held by a rotatable holding means 3 such as a chuck claw, and the rotation of the rotation holding means 3 causes the joint main body 21 to rotate. It is rotated at a predetermined speed.
[0017]
Next, a connection method of the hose welding connection structure will be described according to a procedure.
First, as shown in FIG. 1 (a), an end surface 1a of a soft synthetic resin hose 1 is inserted into an annular concave portion 2a of a joint 2, and its outer peripheral corner 1b and inner peripheral corner 1c are connected to a pair of inclined surfaces 2b, 2c.
[0018]
Thereby, the outer peripheral corner 1b and the inner peripheral corner 1c of the hose end surface 1a are sandwiched and guided between the two inclined surfaces 2b, 2c, and the hose end surface 1a is deformed and straightened without escape. However, even if the hoses are pressed in a ring shape and the hose end face 1a is further pressed strongly to be pressed, the hose is not deformed and escapes from between the inclined surfaces 2b and 2c.
[0019]
At this time, even if the end face 1a of the hose 1 cannot be cut on the same plane perpendicular to the axial direction of the hose 1, simply press the hose end face 1a toward the outer peripheral corner 1b and the inner peripheral corner 1c. Partially protruding portions of the outer peripheral corner 1b and the inner peripheral corner 1c abut against the inclined surfaces 2b and 2c, respectively, or are compressed or deform in a direction in which they escape, thereby being pressed in a ring shape. .
[0020]
In this pressure-contact state, if only the joint 2 is rotated while the hose 1 is non-rotatably fixed and supported, these outer peripheral corners 1b and inner peripheral corners 1c and the inclined surfaces 2b, 2c, which are annularly pressed against each other, are not formed. The frictional contact between the contact portions generates frictional heat.
[0021]
When the thermoplastic resin of the hose 1 and the joint 2 is softened and melted by the frictional heat, the hose end face 1a is pushed in by a predetermined width, for example, about 1 to 2 mm to further press-contact.
[0022]
After a predetermined time, as shown in FIG. 1 (b), the rotation of only the joint 2 is stopped, and the softened and melted portion is allowed to stand still and cooled, and then the outer peripheral corner 1b and the inner peripheral angle which are pressed in a ring shape are fixed. The portion 1c and the two inclined surfaces 2b, 2c are welded and joined in an inner and outer double, and the welding is completed.
[0023]
As a result, the flexible synthetic resin hose 1 and the joint 2 that are easily deformed can be accurately positioned and welded.
[0024]
Further, in the case of the present embodiment, the outer peripheral corner portion 1b and the inner peripheral angle of the hose end surface 1a are opposed to a pair of inclined surfaces 2b and 2c which are provided around the inner surface of the annular concave portion 2a of the joint 2 and have a substantially V-shaped cross section. Since the portion 1c is friction-fused and welded and joined to the inside and outside, the hose end surface 1a is covered and sealed by the inner surface of the annular concave portion 2a.
As a result, even if the hose 1 is a laminated hose, it is possible to prevent a fluid such as water from entering the intermediate layer from the end face 1a.
[0025]
Further, gas generated when the thermoplastic resin is melted by friction between the outer peripheral corner 1b and the inner peripheral corner 1c of the hose end surface 1a and the inclined surfaces 2b, 2c passes through the gas vent hole 2d and out of the annular concave portion 2a. When the melting is advanced and the hose end surface 1a and the annular concave portion 2a can be completely welded and joined, the gas vent hole 2d is filled with the molten thermoplastic resin, and the molten gas enters the annular concave portion 2a. Do not charge.
As a result, it is possible to prevent a hole from being opened in the fusion bonding portion due to the filling of the fusion gas.
[0026]
On the other hand, what is shown in FIGS. 3 to 6 is another embodiment of the present invention, which is the thermoplastic resin joint 2 opposite to the joint side where the annular concave portion 2a is recessed. On the non-joining side, joint bodies 27 and 28 having recessed engagement grooves 29 for non-rotatably engaging with the engagement projections 4a of the rotary jig 4 are used. While the end face 1a of the hose 1 is abutted against and pressed against, the rotary jig 4 is used to rotate only the joint 2 side to perform spin welding (rotary welding, friction fusion welding). Unlike the example, the other configuration is the same as the embodiment shown in FIGS.
[0027]
More specifically, FIG. 3 and FIG. 4 show the joint body 27 on the showerhead side, and FIGS. 5 and 6 show the joint body 28 on the faucet side, 2 shows a case where a shower hose set is manufactured by welding and joining the joint main body 27 of the faucet and the joint main body 28 on the faucet side to both ends of the hose 1.
[0028]
As shown in FIGS. 3 (a) and 5 (a), the connection method of such a hose welding connection structure is to insert the center shaft 4b of the rotary jig 4 into the joint bodies 27 and 28 and to connect a plurality of joints. While the joint projections 4a are non-rotatably locked in the engagement grooves 29, the hose end face 1a is pushed in while pressing only the joint 2 side to make further pressure contact, and after a predetermined time, FIGS. 3 (b) and 5 ( As shown in FIG. 1B, when the rotation is stopped and the cooling is performed, the joint body 27 on the shower head side is attached to both end surfaces 1a of the hose 1 in the same manner as in the embodiment shown in FIGS. And the joint body 28 on the faucet side are separately welded and joined.
[0029]
In the above-mentioned embodiment, the case where the end face 1a of the hose 1 is brought into contact with the joint side of the joint 2 and pressed against the joint 2 while rotating only the joint 2 side to perform spin welding is shown. If the flexible synthetic resin hose 1 that can be easily rotated can be rotated without bending, the joint 2 side may be fixedly supported and only the hose 1 side may be rotated to perform spin welding.
[0030]
Further, the hose 1 is not limited to the above-described laminated hose (blade hose), but is not shown, but has an intermediate layer between an opaque inner layer and a transparent outer layer. A spiral reinforcing hose (for-run hose) in which a reinforcing material and a linear reinforcing material having a circular cross section are spirally wound and integrated, or a belt-like reinforcing material having a rectangular cross section as an intermediate layer and a linear linear reinforcing material. Either one of the reinforcing members is wound and integrated, or a thread-like reinforcing material such as a glass fiber or a flame-retardant fiber is braided, spirally wound and integrated, or a metal wire is spirally embedded. A similar effect can be obtained by using a conventionally known soft hose such as a spring hose, a soft synthetic resin hose having a single-layer structure, or a tube having a smaller diameter.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the outer periphery of the end surface 1a of the soft synthetic resin hose 1 is provided with respect to the pair of inclined surfaces 2b and 2c provided around the joint side of the joint 2. By hitting the corner portion 1b and the inner peripheral corner portion 1c, the outer peripheral corner portion 1b and the inner peripheral corner portion 1c of the hose end surface 1a are sandwiched between the inclined surfaces 2b and 2c, and the hose end surface 1a is deformed. When the hose 1 and the joint 2 are rotated in this state, only the outer peripheral corner portion 1b and the inner peripheral corner portion 1c, which are circularly pressed against each other, are circularly pressed without escape. Since the two inclined surfaces 2b and 2c are friction-fused and welded to the inside and outside, the soft synthetic resin hose 1 which is easily deformed and the joint 2 can be accurately positioned and welded reliably.
Therefore, when the end face of the hose is brought into close contact with the end face of the joint and pressed strongly, deformation of the end face of the hose is easily prevented, and the end face of the hose is prevented from being deformed as compared with the conventional one in which it is difficult to accurately butted and weld the two end faces. Can be welded and joined without using a special holding mechanism for the hose, and the hose welding connection cost can be reduced.
[0032]
In addition to the effect of the first aspect of the present invention, the second aspect of the present invention provides a hose end face 1a with respect to a pair of inclined faces 2b and 2c which are provided on the inner surface of the annular concave portion 2a of the joint 2 and have a substantially V-shaped cross section. The outer peripheral corner portion 1b and the inner peripheral corner portion 1c are friction-fused and welded and bonded in an inner and outer manner, so that the hose end surface 1a is covered and sealed by the inner surface of the annular concave portion 2a. Even if it does, fluid can be prevented from entering the intermediate layer from the end face 1a.
Therefore, the laminated hose does not peel or deteriorate, and its life can be extended.
[0033]
The invention of claim 3 has the effect of the invention of claim 2, and is generated when the thermoplastic resin is melted due to friction between the outer peripheral corners 1b and the inner peripheral corners 1c of the hose end face 1a and the inclined surfaces 2b, 2c. Since the discharged gas is discharged to the outside of the annular concave portion 2a through the gas vent hole 2d, it is possible to prevent the hole from being opened in the fusion bonding portion due to the filling of the molten gas.
Therefore, no fluid leaks from the welded portion.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view of a hose welding connection structure showing one embodiment of the present invention, wherein (a) shows a state before welding and joining, and (b) shows a state after welding and joining.
FIG. 2 is a partially enlarged longitudinal sectional side view taken along line (2)-(2) of FIG. 1 (a).
FIG. 3 is a longitudinal sectional front view of a hose welding connection structure showing another embodiment of the present invention, wherein (a) shows a state before welding and joining, and (b) shows a state after welding and joining.
FIG. 4 is a partially enlarged longitudinal sectional side view taken along line (4)-(4) in FIG. 3 (a). FIG. 3 is a partial longitudinal sectional front view of the device.
FIG. 5 is a longitudinal sectional front view of a hose welding connection structure showing another embodiment of the present invention, wherein (a) shows a state before welding and joining, and (b) shows a state after welding and joining.
FIG. 6 is a partially enlarged longitudinal sectional side view taken along line (6)-(6) in FIG. 5 (a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe, hose made of soft synthetic resin 1a End face 1b Outer corner 1c Inner corner 2 Joint 2a Annular concave part 2b Inclined surface 2c Inclined surface 2d Gas vent hole

Claims (3)

熱可塑性樹脂製の管（１）と継手（２）の端面同士を突き合わせて圧接しながら、これら管（１）及び継手（２）のどちらか一方を他方に対して回転させることにより、これら接触部分に発生する摩擦熱で両者の熱可塑性樹脂が軟化溶融して溶着接合させるホース溶着接続構造において、
前記管（１）が変形し易い軟質合成樹脂製のホースであり、継手（２）を硬質合成樹脂製とすると共にその接合側に、該ホース（１）の端面（１ａ）の外周角部（１ｂ）及び内周角部（１ｃ）と対向する一対の傾斜面（２ｂ，２ｃ）を夫々周設し、これら傾斜面（２ｂ，２ｃ）に上記ホース端面（１ａ）の外周角部（１ｂ）及び内周角部（１ｃ）を夫々全周に亘り突き当てて環状に圧接しながら、ホース（１）及び継手（２）のどちらか一方のみを回転させたことを特徴とするホース溶着接続構造。By rotating one of the pipe (1) and the joint (2) with respect to the other while pressing the end faces of the pipe (1) made of a thermoplastic resin and the joint (2) against each other and pressing them against each other, these contact points are brought about. In a hose welding connection structure in which both thermoplastic resins are softened and melted by friction heat generated in the part and welded and joined,
The pipe (1) is a hose made of a soft synthetic resin which is easily deformed, and the joint (2) is made of a hard synthetic resin, and the joint (2) is provided on the joint side with the outer peripheral corner (1a) of the end face (1a) of the hose (1). 1b) and a pair of inclined surfaces (2b, 2c) facing the inner peripheral corner (1c), respectively, and the outer peripheral corners (1b) of the hose end surface (1a) are formed on these inclined surfaces (2b, 2c). A hose welding connection structure characterized in that only one of the hose (1) and the joint (2) is rotated while abutting the inner peripheral corner (1c) over the entire circumference and pressing in an annular manner. . 前記継手（２）の接合側に、ホース（１）の端面（１ａ）が嵌入する環状凹部（２ａ）を凹設し、この環状凹部（２ａ）の内面に一対の傾斜面（２ｂ，２ｃ）を断面略Ｖ字形に対向するように周設した請求項１記載のホース溶着接続構造。An annular recess (2a) into which the end surface (1a) of the hose (1) fits is provided on the joint side of the joint (2). The hose welding connection structure according to claim 1, wherein the peripheral portion is provided so as to face a substantially V-shaped cross section. 前記環状凹部（２ａ）にガス抜き孔（２ｄ）を、一対の傾斜面（２ｂ，２ｃ）の間に位置するように開穿した請求項２記載のホース溶着接続構造。The hose welding connection structure according to claim 2, wherein a gas vent hole (2d) is formed in the annular concave portion (2a) so as to be located between the pair of inclined surfaces (2b, 2c).
JP2002261439A 2002-09-06 2002-09-06 Hose welding connection structure Pending JP2004100765A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009250441A (en) * 2008-04-09 2009-10-29 Ti Group Automotive Systems Llc Tube-to-hose coupling
JP2012042048A (en) * 2010-06-23 2012-03-01 Norma Germany Gmbh Pipe arrangement
JP2012045747A (en) * 2010-08-25 2012-03-08 Kurashiki Kako Co Ltd Spin welding apparatus
JP2012197806A (en) * 2011-03-18 2012-10-18 Kurashiki Kako Co Ltd Fuel tube and connector for the same
JP2017160925A (en) * 2016-03-07 2017-09-14 積水化学工業株式会社 Joint member and piping structure
EP1640141B1 (en) * 2004-09-27 2018-11-07 Veritas Ag Device, assembly and method for joining pipes, vehicle with such a device or assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1640141B1 (en) * 2004-09-27 2018-11-07 Veritas Ag Device, assembly and method for joining pipes, vehicle with such a device or assembly
JP2009250441A (en) * 2008-04-09 2009-10-29 Ti Group Automotive Systems Llc Tube-to-hose coupling
JP2012042048A (en) * 2010-06-23 2012-03-01 Norma Germany Gmbh Pipe arrangement
EP2444707B1 (en) * 2010-06-23 2015-08-12 NORMA Germany GmbH Tubing assembly
US9482376B2 (en) 2010-06-23 2016-11-01 Norma Germany Gmbh Pipe arrangement
JP2012045747A (en) * 2010-08-25 2012-03-08 Kurashiki Kako Co Ltd Spin welding apparatus
JP2012197806A (en) * 2011-03-18 2012-10-18 Kurashiki Kako Co Ltd Fuel tube and connector for the same
JP2017160925A (en) * 2016-03-07 2017-09-14 積水化学工業株式会社 Joint member and piping structure

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