JP4509400B2 - Hose manufacturing method and apparatus - Google Patents

Hose manufacturing method and apparatus Download PDF

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Publication number
JP4509400B2
JP4509400B2 JP2001008826A JP2001008826A JP4509400B2 JP 4509400 B2 JP4509400 B2 JP 4509400B2 JP 2001008826 A JP2001008826 A JP 2001008826A JP 2001008826 A JP2001008826 A JP 2001008826A JP 4509400 B2 JP4509400 B2 JP 4509400B2
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Prior art keywords
hose
core
cored bar
engagement
metal
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JP2002210751A (en
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茂己 小林
実 吉田
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UD Trucks Corp
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UD Trucks Corp
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  • Rigid Pipes And Flexible Pipes (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Description

【0001】
【発明の属する技術分野】
この発明は、ホースの製造方法および製造装置に関する。
【0002】
【従来の技術】
高圧高温用のホースは、従来の場合、図18のような工程により製造される。第1工程(裁断工程)においては、耐熱繊維に耐熱ゴムをトッピングする生地1を所定の大きさに裁断する。第2工程(生ホース作り工程)においては、生地1を円筒形の心棒2に巻き付ける。その際、心棒2は万力で固定され、トラックなど大型車両のインタクーラホースにおいては、1枚の生地1で2巻き(2層)にして2枚の生地を使って4層の生ホース1aを作る。この作業は層間のエアを抜きながら手作業で心棒2に生地1を巻き付けてゆく。
【0003】
第3工程(芯金への挿入工程)においては、円筒形の心棒2から生ホース1aを抜き取り、外形にくせ付け形状を備える芯金3をその生ホース1aに挿入する。第4工程(テーピング工程)においては、円筒形の生ホース1aに芯金3のくせ付け形状を出すように包帯4(テープ)を巻き付ける。このテーピングは、所定時間に亘って維持される。そして、包帯4を剥がしてくせ付け形状の出具合などを確認し、その結果が良ければ、その形状を固定するため、また包帯を巻き付ける。
【0004】
第5工程(加硫工程)においては、ホースの形状を定着化させるため、芯金3の挿入する生ホース1a(テーピング状態)を加硫処理する。トラックなどのインタクーラホースの場合、入口側(高温高圧側)ホースは、生地にシリコンゴムが使われ、蒸気加硫5a(一次加硫)の後、熱気加硫5b(二次加硫)が行われる一方、出口側(比較的、低温低圧側)ホースは、生地にクロロプレンゴムが使われ、蒸気加硫5a(一次加硫)のみで済む。第6工程(定尺カット工程)においては、ホース1bを芯金3から抜き取り、長さを合わせるため、両端をカットする。そして、第7工程において、製品の検査が行われ、OKであれば、製品として完成することになる。
【0005】
なお、特開平9−94625号において、このようなホースに係る関連技術が開示される。
【0006】
【発明が解決しようとする課題】
このような従来方法においては、各工程の殆どが熟練者の手作業で行われるが、芯金からホースを抜き取る作業については、とくに肉厚も大きい高圧用ホースの場合、芯金のくせ付け形状(凹凸)が抵抗となり、これらを乗り越えさせるのが難しく、多大の労力を要求される、という不具合が考えられる。
【0007】
この発明は、このような不具合の解決を目的とする、ホースの製造方法およびその装置を提供しようとするものである。
【0008】
【課題を解決するための手段】
第1の発明は、生地を巻き付けて作られる生ホースを所定形状に芯金を用いて成形する工程と、その形状を加硫処理で定着化させる工程と、加硫処理後のホースと芯金の端部との間に有底筒形のカプラの開口部を挿入する工程と、カプラの外周にホースを締め付ける工程と、高圧流体の供給源にカプラの内部を接続してカプラの内部から芯金とホースとの間に高圧流体を供給しながらホースを芯金から抜き取る工程と、を備え、芯金はその端部に着脱可能な仮組治具を備えるものが用いられ、カプラの開口部をホースと芯金との間に挿入する工程の前に芯金の端部から仮組治具を外して芯金とホースとの間にカプラの開口部を受け入れる空隙を形成する工程と、を備えることを特徴とする。
【0009】
第2の発明は、生地を巻き付けて作られる生ホースを所定形状に芯金を用いて成形する手段と、その形状を加硫処理で定着化させる手段と、加硫処理後のホースと芯金の端部との間に高圧流体を供給しながらホースを芯金から抜き取る手段と、を備えるホースの製造装置において、前記ホースを芯金から抜き取る手段は、芯金にその端部を軸方向へ取り外し可能に結合する手段と、この端部に接続される配管から高圧流体を芯金とホースとの間に導く内部流路と、同じく端部の外周にホースを締め付ける手段と、を備え、前記芯金にその端部を軸方向へ取り外し可能に結合する手段は、芯金とその端部との間でこれらの軸廻りの相対回転により、両者の軸方向へ相対変位を拘束する係合状態と、同じく軸方向への相対変位を許容する非係合状態と、に変換可能な係合手段と、を備えたことを特徴とする。
【0010】
第3の発明は、第2の発明に係るホースの製造装置において、前記係合手段は、端部の芯金との分断面にその軸線を中心とする円筒形に突出する嵌合凸部と、その外周に嵌合凸部の軸線を中心とする扇形に突出する係合突起と、芯金の端部との分断面に開口する嵌合凹部と、を備え、嵌合凹部は、端部の係合凸部を含む嵌合凸部が軸方向へ挿入可能な鍵穴状に形成され、端部の係合突起を含む嵌合凸部の挿入状態において、端部と芯金との間でこれら軸廻りの係合状態への相対回転により、端部の係合突起の進入を受け入れる係止溝を備えたことを特徴とする。
【0011】
第4の発明では、第2の発明または第3の発明に係るホースの製造装置において、前記係合手段は、端部と芯金との間でこれら軸廻りの係合状態への相対回転に伴って係合面間の面圧を上昇させるテーパを設定したことを特徴とする。
【0012】
第5の発明では、第2の発明〜第4の発明に係るホースの製造装置において、前記芯金にその端部を取り外し可能に結合する手段は、芯金とその端部との間でこれらの軸廻りの相対回転を許容する非係合状態と、前記係合手段の係合状態において、芯金とその端部との間でこれらの軸廻りの相対回転を拘束する係合状態と、に変換可能なロック機構と、を備えたことを特徴とする。
【0013】
第6の発明では、第5の発明に係るホースの製造装置において前記ロック機構は、端部に軸方向へネジ穴を介して進退可能に挿入されるピンと、このピンに対応して芯金に形成されるピン穴と、を備え、前記係合手段の係合状態において、ピンを芯金側へ進める方向へ回すと、ピンの先端部がピン穴に進入する係合状態となり、芯金とその端部との軸廻りの相対回転を拘束する一方、ピンを逆方向へ回すと、ピンの先端部がピン穴から後退する非係合状態となり、芯金とその端部との軸廻りの相対回転を許容することを特徴とする。
【0014】
第7の発明では、第5の発明に係るホースの製造装置において前記ロック機構は、端部の嵌合凸部に外径側へ山形に折り曲げられる板バネが屈伸自在に構成され、板バネを係止する係合凹部が芯金の嵌合凹部に配置され、前記板バネは、端部と芯金との間でこれら軸廻りの係合状態への相対回転により、鍵穴状の嵌合凹部の小径部に山形の折曲部が撓みながら乗り上げ、前記係合手段の係合状態において、係合凹部に来ると、山形の折曲部が弾性復帰して係合凹部に係止されることを特徴とする。
【0015】
【発明の効果】
第1の発明では、生ホースは、芯金を用いて所定形状に成形され、その形状に加硫処理で定着化される。その後、ホースは、芯金との間に高圧流体(たとえば、圧縮空気)を供給しながら、芯金の外形から抜き取られるのである。その際、カプラの開口部が芯金の一端から芯金とホースとの間に差し込まれ、カプラの外周にホースが高圧流体(たとえば、圧縮空気)の漏れを生じないように締め付けられる。そして、カプラの内部に高圧流体が供給されると、カプラの開口部から芯金の間に導かれる高圧流体により、ホースは芯金の外形から剥離して浮き上がる具合に膨れるので、芯金から大きな抵抗を受けることなく、容易に引き抜けるようになる。その後、ホースは締め付けを緩め、カプラの外周から抜き取られる。芯金はその端部に着脱可能な仮組治具を備えるので、芯金からホースを抜き取る場合、芯金の端部から仮組治具を外すと、芯金とホースとの間にカプラの開口部を受け入れる空隙が形成される。このため、カプラの差し込みが容易となり、芯金とホースとの間を無理にこじ開けなくて済むので、ホースの内面が傷つけられるようなこともなく、したがってカプラの差込代に相当する端材幅を生ホースに予め設定しなくても良くなり、ホースの価格(材料費)低減を大いに促進できる。
【0016】
第2の発明では、生ホースの加硫処理後、芯金からホースを抜き取る場合、芯金の端部が軸方向へ取り外せる状態に結合を解除すると共に、この端部外周にホースを締め付ける。そして、芯金の端部に配管を接続して高圧流体(たとえば、圧縮空気)を供給しながら、芯金の端部を軸方向へ引っ張ることにより、ホースが端部と一緒に芯金から抜き取れるのである。その際、芯金の端部から内部通路を介して芯金とホースとの間に導かれる高圧流体により、ホースは芯金の外形から剥離して浮き上がる具合に膨れるので、芯金から大きな抵抗を受けることなく、容易に引き抜けるようになる。その後、ホースは締め付けを緩め、端部の外周から抜き取られる。したがって、芯金からホースを抜き取る手段として、第1の発明のようにカプラを用いて芯金とホースとの間に差し込む必要がなくなり、端材幅の低減が有効に促進しつつ、ホースの端部(カフス部)内径を精度よく形成できる。また、係合手段を備えるため、芯金にその端部を相対回転させることにより、端部が軸方向へ抜き取れる係合状態と、抜き取れない非係合状態と、の変換が容易に行える。
【0017】
第3の発明では、係合手段は、端部の係合突起を含む嵌合凸部を芯金の鍵穴状の嵌合凹部に挿入し、芯金と端部との間でこれらを係合状態への変換方向に相対回転させると、端部の係合突起が芯金の係止溝に進入し、芯金と端部との軸方向への相対変位を拘束する係合状態となり、この状態から非係合状態への変換方向に相対回転させると、係止溝から係合突起が外れ、端部の係合突起を含む嵌合凸部が芯金の鍵穴状の嵌合凹部から軸方向へ抜き取ることが可能となる
【0018】
第4の発明では、テーパにより、係合状態への変換動作に伴って係合面間の面圧が上昇する、つまり係合状態に締付力が作用するため、芯金とその端部との間を係合状態へ締め込むと、簡単に非係合状態へ変換しないようになり、芯金からその端部が外れるのを防止できる
【0019】
第5の発明では、ロック機構により、芯金とその端部との相対回転が拘束可能となる。このため、芯金からホースを抜き取るまでの間は、芯金とその端部との間に何らかの原因により回転トルクが作用しても、ロック機構により、芯金と端部との相対回転が抑えられ、芯金から端部が外れるのを防止できる
【0020】
第6の発明では、芯金とその端部との間で係合手段の係合状態において、貫通穴とピン穴は、同軸上に合致する位置関係に設定される。そして、貫通穴にピンをネジ穴を介して螺合すると、ピンの先端部がこれと同軸上に合致するピン穴に進入する係合状態となり、芯金とその端部との間でこれら軸廻りの相対回転が拘束される。ホースを端部と一緒に芯金から抜き取るときは、ピンをネジ穴の螺合を緩める方向へ回すと、ピンの先端部がピン穴から後退する非係合状態となり、芯金と端部14bとの相対回転が許容され、係合手段の非係合状態へ変換が可能となる
【0021】
第7の発明では、板バネは、係止溝に係合突起が進入すると、嵌合凹部の小径部に山形の折曲部が撓みながら乗り上げ、係合凹部に来ると、弾性復帰して山形の折曲部が係止することになり、係合手段の係合状態において、嵌合凸部と嵌合凹部との相対回転に規制力を及ぼすのである
【0022】
【発明の実施の形態】
図1はこの発明の実施形態を表す。この例においては、トラックなど大型車両に採用される、インタクーラホース(高温高圧用の蛇腹ホース)の製造方法について説明する。なお、ホース表面に蛇腹形状を設けたホースについて記載するが、この発明は蛇腹ホースに適用が限定されるものではない。
【0023】
第1行程(a)においては、耐熱繊維に耐熱ゴムをトッピングする生地10を所定の大きさに裁断する。第2工程(b)においては、円筒形の心棒11に生地10を巻き付けて生ホース10aを成形する。円筒形の心棒11は、回転治具12にチャッキングされ、モータ13(電動モータまたは油圧モータ)の回転力で生地10を巻き取るようになっている。生地10はこの場合、2本分の幅で4層巻きの長さに裁断されたものを、回転治具12の回転力により、作業者が層間のエアを抜きながら巻き付けてゆくことになる。回転治具12を使用するため、従来の手巻きに較べると、生地10が歪んで生ホース10aの両端が蛇行状に乱れるようなことが格段に少なくなり、定尺化における端材幅の削減をもたらす効果が期待できる。また、1枚の生地10を4層巻きにするので、2枚の生地を2層ずつ重ねて巻き付けるのに較べると、生地10の重ね合わせ部分(ラップ分)の無駄も節約できることになる。
【0024】
第3工程(c)においては、円筒形の心棒11から生ホース10aを抜き取り、外形に蛇腹のくせ付け形状を備える芯金14をその生ホース10aに挿入する。芯金14を固定するため、クランプ装置15が用いられ、エアシリンダ15aの作動により、芯金14の端部を締め付ける。クランプ装置15のエアシリンダ15aは、作業者の足元に配置のペダルにより、エアの供給(クランプの作動)およびエアの排出(クランプの解除)を行えるように構成される。1本分の芯金よりも2本分の芯金14は、当然のことながら長くなるので、従来のように万力で芯金を締め付けるのに較べると、芯金14の挿入作業を能率的に処理できる。また、作業者の負担も大幅に軽減される。
【0025】
第4工程(d)においては、3本ロール機16に芯金14の挿入する生ホース10aを運び入れ、3本のロール16a〜16cにより、蛇腹ホースの形状にくせ付けする。また、3本ロール機16により芯金14を回転させながら、包帯17の送りガイド(図2,図4、参照)により、くせ付け形状を維持するためのテーピングを行う。第5工程(e)においては、蛇腹の形状を加硫処理で定着化させる。インタクーラホースの場合、入口側(高温高圧側)ホースは、生地にシリコンゴムが使われ、蒸気加硫(一次加硫)の後、熱気加硫(二次加硫)が行われる一方、出口側(比較的、低温低圧側)ホースは、生地にクロロプレンゴムが使われ、蒸気加硫(一次加硫)のみで済む。第6工程(f)においては、多目的治具(図5、参照)を用いて、蛇腹ホース10bの包帯(テーピング)剥がしおよび定尺化(カット)を行う。定尺化については、芯金14から抜き取る前に2本分の蛇腹ホース10bに対し、両端の端材幅をカットすると共に、2本分の中央を分断(カット)する。そして、図示しないが、次の工程において、最終的な検査が行われ、OKであれば、製品として完成することになる。なお、インタクーラホースの場合、レイアウトの制約などから、組み付けに曲げが要求されることもあり、直管形状の製品に十分な柔軟性を与えるため、蛇腹形状の山径(凸部の外形)は、カフス部(ホース両端の直管部)の外径よりも大きく設定される。
【0026】
図2,図3は、第4工程(d)に用いられる、3本ロール機16を表すものであり、基盤20に箱型の骨組み19(フレーム)が構築される。フレーム21において、芯金14の軸を挟む両側にそれぞれ下方から芯金14を支持するよう芯金14と平行に配置される2本のロール16b、16cと、これらロール16b、16c間の中央上方から芯金14を抑えるよう芯金14と平行に配置される1本のロール16aと、が備えられる。各ロール16a〜16cの外形は、芯金14の反転形状に設定される。ロール16b、16cを同期的に回転させるため、基盤20にモータ21が配置され、モータ21の回転軸21aとロール16b,16cの端部との間に回転伝達機構(ギヤ22a〜22d,チェーン23)が介装される。また、ロール16aは、フレーム19の両側に形成のガイド25に沿って上下方向へ移動可能なサブフレーム26に支持され、サブフレーム26を吊持する2機のエアシリンダ27がフレームの天井(上面)に配置される。これらエアシリンダ27が同期的に伸縮すると、サブフレーム26のガイド25に沿う移動により、ロール16aが芯金14に対して昇降するようになっている。
【0027】
エアシリンダ27の駆動回路(図示せず)には、これらの伸縮(作動方向)を要求に応じて同期的に切り替えるバルブのほか、これらへの作動圧(エア圧)を作業工程の進度に応じて段階的に制御する手段が設けられる。具体的には、3本のロール16a〜16cの駆動指令により、エアシリンダ27は伸側へ作動すると共に、2本のロール16b,16c間の芯金14を上方からロール16aが抑えると、モータ21の作動によりロール16b、16cおよび16aが回転する。初期段階においては、エアシリンダ27の作動圧は低めに抑えられ、次の段階に進むと高めに制御するようになっている。これに連れてモータ21の回転速度も同様に制御するようにしても良い。
【0028】
このような3本ロール機16を、第4工程(d)において使用することにより、芯金14の挿入する生ホース10aは、3方向から押圧されながら、ロール16b,16cの回転を受けて逆方向へ回転するようになる。このため、熟練者の手作業に頼らず、芯金14の挿入するホース10a(加硫処理前の生ホース)へのくせ付けが能率的かつ均一に処理できる。また、2本のロール16b,16cにより下方から芯金14の挿入する生ホース10a(荷重)を支持しつつ、エアシリンダ27の推力およびロール16aの荷重を上方から生ホース10aに加えるので、くせ付けの締付力(成形力)を効率よく十分に確保できる。また、エアシリンダ27への作動圧(およびモータ21の回転速度)を既述のように制御することにより、生ホース10aに無理なく、蛇腹の凹凸形状を忠実に出す(くせ付けする)ことができる。
【0029】
図2において、30はくせ付けの完了後にその形状を維持するためのテーピングおいて、3本のロール16a〜16cにより押圧されながら回転する芯金14の挿入する生ホース10aに巻き込まれる包帯17の送りをガイドする手段であり、図4のようにフレーム19の前面両側に配置の1対のブラケット31に2本のローラ30a,30bが上下へ所定の間隔を置いてロール16a〜16cと平行に支持される。2本のローラ30a,30bに前方から接触するローラ30cがロール16a〜16cと平行に配置され、このローラ30cを支持する1対のサブブラケット33が設けられる。サブブラケット33は、ブラケット31上方に基端がピン結合するステイダンパ35の先端に支持され、ダンパ35の伸縮により、ローラ30cが2本のローラ30a,30bに接触する作動位置と、2本のローラ30a,30bからローラ30cが斜め下方へ離れる退避位置との間を移動(ローラ16a〜16cの前面を開閉)可能になっている。また、ローラ30cが2本のローラ30a,30bに接触する作動位置にサブブラケット33を拘束および解除するためのクランプハンドル36が備えられる。
【0030】
包帯17は、前方よりローラ30bの下側から、その背面を回してローラ30cとの接触面を通し、ローラ30cの正面を回してローラ30aとの接触面を通し、3本のロール16a〜16cへ伸ばして生ホース10aに1回程度、手巻きする。この状態で3本ロール機16を駆動すると、3方向から押圧されながら芯金14と共に回転する生ホース10aが包帯17を巻き込むようになる。作業者は、送りガイド30の手前でローラ30a〜30cに沿って軸方向へ適度なピッチ速度で包帯を送り出せばよく、3本ロール16a〜16c側の巻き込みに基づいて、テンションが包帯17に作用するので、作業者に大きな負担を掛けることなく、蛇腹の形状を固くテーピングすることができる。なお、包帯17の皺や捩れを防ぐため、ロール16bはその回転が拘束される。
【0031】
図5は、第6工程(f)に用いられる多目的治具40を表すものであり、機台41にモータ42(電動モータまたは油圧モータ)が設置され、その回転軸に芯金14の端部を連結するチャック43が設けられる。モータ42の回転軸と同軸上に芯金14を回動自在に支持するベアリング44,45が配置される。このうち、一方は機台41に設置され、他方は芯金14の長さ違いに対応するため、床面を移動可能な受台46に設置される。機台41において、ベアリング44に支持される芯金14の軸方向へカッタ47を位置調整可能に支持する治具台48が配置される。ベアリング44から治具台48へ向けてガイドロッド49(位置表示用に目盛りを付けてもよい)が突設され、治具台48の移動(カッタ47の位置調整)を案内する。また、ガイドロッド49に拘束可能な取付部50が設けられ、この取付部50にカッタ47は交換可能に装着される。取付部50は拘束を解除すると、ガイドロッド49を摺動および回動が自在になり、カッタ47を不使用時に下方へ回動して治具台48の内側へ格納できる。
【0032】
このような多目的治具40により、芯金14の挿入するホース10b(加硫処理後のホース)をベアリング44,45間に支持すると、この状態において、ホース10bを回転させながら、テーピングを容易かつ迅速に剥がすことができる。その後、芯金14の端部をモータ42のチャック43に結合し、モータ42の作動によりホース10bを回転させながら、カッタ47によりホース10bの定尺化も容易に処理できるのである。定尺化に芯金14の位置決めが必要なため、芯金14の端部にチャック43のピン穴51aに対応するピン穴51bが設けられ、これらのピン穴51a,51bへ挿入する位置決め用のピンが備えられる。
【0033】
芯金14については、2本分のホース10b間の境に所定幅の環状凸部52(突起)が形成され、これに対応する環状凹部53が3本ロール機16の各ロール16a〜16cに形成される(図3、参照)。図6に芯金14側の環状凸部52と各ロール16a〜16c側の環状凹部53を表す。定尺化のカッタ47により、芯金14に傷が付いても、2本分の蛇腹ホース10bを分断(カット)する際の傷は、所定幅の環状凸部52に集中する。このため、芯金14の再使用により、ホース10bの内面に痕が付いても、ホース10bの端部内周に生じる大径部(所定幅の環状凸部52に対応する段部)に限定されるため、製品の価値や品質を損なうことがない。蛇腹ホース10bは、両端の片側に大径部を生じるため、これを組付方向の目印に利用できる。また、バルジを備える差し込み(配管コネクタ)側に対しても、ホース端部の大径部により組み付けが容易となるという効果が得られる。
【0034】
モータ42は機台41に設置され、チャック43側の前部(脚部)が矢印のよう後部(脚部)を支点に上方へ持ち上げ可能にマウントされる。これにより、モータ42のチャック43に結合の芯金14を上方へ持ち上げ、ベアリング44,45などに干渉しない状態において、芯金14から蛇腹ホース10bを抜き取ることが可能になる。インタクーラホースの場合、入口側と出口側でゴムの材質が異なり、出口側ホース(クロロプレンゴム)については、芯金14が熱い(加硫時の熱量が残る)うちであれば、チャック43に結合の芯金14を上方へ持ち上げ、これに円筒形の生ホース10aを挿入することも可能になる。つまり、多目的治具は、包帯剥がしや定尺化のほか、芯金から蛇腹ホース10bを抜き取るときや生ホース10aを芯金14に挿入するときにおいても、有効に活用することができるのである。
【0035】
図1の製造方法においては、第4工程(d)に3本ロール機16および包帯の送りガイド手段30、第6工程(f)に多目的治具40、を採用するので、熟練者の技量に頼らず、品質の均一な蛇腹ホースを能率的に製造できるほか、作業者の負担も大幅に軽減される。また、1本の芯金14から、複数本(この例では、2本)の蛇腹ホースが取れるため、定尺化にホース間の分断(カット)を正確に行うことにより、その間の端材幅を0にすること(ノーカット)も可能になる。これらの結果により、インタクーラホースなど高温高圧用の蛇腹ホースを廉価に提供できるという効果が得られる。
【0036】
3本ロール機16により、包帯17の送りガイド手段30を使って、生地10を芯金14に巻き付けることも可能となり、生地10の巻き付け(生ホース作り)から蛇腹の形状へのくせ付けおよびその形状にテーピングするまでを連続的に処理できるようになる。その場合、図1の製造方法において、第3工程(c)が省略され、蛇腹ホースをさらに効率よく製造できる。また、定尺化における、ホース間の分断(カット)は、層間のエアを抜くため、加硫処理前に行うようにしてもよい。
【0037】
図7は、第6工程(f)において、ホース間の分断(カット)後に蛇腹ホース10bを芯金14から抜き取りるための方法および手段を説明するものであり、有底筒形のカプラ60が用いられる。カプラ60は、有底筒形の開口部が芯金14の端部(外形の直管形状部)とホース10bとの間に挿入可能な差し込み部60aに形成され、底部の配管用コネクタ60bに図示しない高圧流体の供給源(この場合、圧縮空気を送り出すエアコンプレッサ)が接続される。カプラ60の差し込み部60aは、その先端がくさび状に形成され、この外径に膨らみ(バルジ60c)が与えられる。
【0038】
カプラ60は、芯金14の端部に軸方向から押し込むことにより、芯金14とホース10bとの間に開口部(差し込み部60a)を進入させる。その状態において、バンド62により、ホース10bとカプラ60との隙間を圧縮空気が外部へ逃げないように密封する。そして、エアコンプレッサを駆動すると、カプラ60の内部に圧縮空気が供給され、その差し込み部60aから芯金14とホース10bとの間に導かれる。
【0039】
この圧縮空気により、ホース10bは芯金14の外形から剥離して浮き上る具合に膨れるので、カプラ60と一緒に軸方向へ引っ張ると、芯金14の外形(とくに蛇腹のくせ付け形状)から、大きな抵抗を受けることなく、容易に抜き取れるようになる。芯金14の反対側に残るホース10bの抜き取りについても、芯金14の反対側にモータ42のチャッキング(図5、参照)を変えてから、同じ要領でカプラ60を組み付けて圧縮空気を供給することにより、容易に処理できるのである。その後、蛇腹ホース10bはバンド62を緩め、カプラ60から外される。
【0040】
カプラ60は、芯金14への組み付け時にホース10bとの間をこじ開けるように差し込まれるので、ホース10bの内面を傷つけてしまう可能性がある。このため、カプラ60の差込代sに相当する端材幅が生ホース10aに予め設定され、第6工程(f)の最終段階において、これら端材幅sの切除(定尺カット)が行われるのである。
【0041】
このような端材幅sについても、これらを0にすること(ノーカット)が望まれる。このため、図8においては、芯金14とホース10bとの間にカプラ60の開口部60aを受け入れる空隙を形成するための手段として、芯金14の端部に着脱可能な仮組治具64が備えられる。仮組治具64は、生ホース10aの端部(カフス部)を成形するための外径形状(カフスのくせ付け形状)を備える有底筒形に形成され、芯金14の端部へ組み付けやすく、筒形の内径が開口側の鋭角な先端から底部へ向けて次第に縮小するテーパ64aに設定される。芯金14の端部は、仮組治具64の内部に隙間なく嵌合するよう、治具64の内径形状(テーパ64a)に対応する外径形状に形成される。
【0042】
仮組治具64の底部中央にナット64bが結合され、そのネジ穴に螺合するネジ溝が芯金の角軸部14a(モータ42などにチャッキングされる)の根本部に形成される。60がカプラであり、開口部(差し込み部60a)は、ホース10bの端部(カフス部)内径と略同等の外径に設定される。60bがエアコンプレッサに接続される配管用コネクタ、62がカプラ60の外周にホース10bを締め付けるバンドである。なお、芯金14の端部において、カプラ60の先端(バルジ60cを備えるくさび状)の当たりを逃がすための、環状の窪み66が仮組治具64の内径形状に対応する外径形状(テーパ67)に形成される。
【0043】
仮組治具64は、初期状態において、芯金14の端部に組み付けられ、第4工程(d)において、生ホース10aの両端部に直管形状(カフス部の形状)を与える。第5工程(e)の加硫処理後、第6工程(f)において、蛇腹ホース10bを芯金14から抜き取るときは、角軸部14aに螺合するナット64bを緩め、仮組治具64を芯金14の端部から外すと、芯金14とホース10bとの間に空隙(治具64の抜けた跡)が形成される。この空隙にカプラ60の開口部60aを挿入するのであり、後の処理は図7の場合と同じ要領で行われることになる。
【0044】
このように、芯金14の端部に着脱可能な仮組治具64を備えるので、芯金14からホース10bを抜き取る場合、仮組治具64を外すと生じる空隙により、芯金14とホース10bとの間へのカプラ60の差し込みが容易となり、ホース10bの内面を傷つけることもない。したがって、カプラ60の差込代s(図7、参照)に相当する端材幅を生ホース10aに予め設定しなくて良くなり、製品の原価(材料費)を低減できるという効果が得られる。
【0045】
この例においては、カプラ60の着脱に加えて、仮組治具64の着脱が必要となる。このため、図9〜図11においては、芯金14にその端部14bが蛇腹のくせ付け形状とカフスのくせ付け形状との境目から分割され、後述の変換手段を介して軸方向へ取り外し可能に結合される。端部14bの外周に段付部70が設けられ、その段付面を含む小径側がカフスのくせ付け形状となるのである。なお、段付部70は2段に構成され、芯金中間の環状凸部52(図6、参照)と同じく、ホース端部(カフス部)の内周に大径部(広口部)を与えられるようになっている。
【0046】
端部14bの分断面にその反対側の角軸部14aと同軸上に突出する円筒形の嵌合凸部71が設けられ、その外周の所定位置に1対の係合突起72が形成される。端部14bとの分断面側(芯金本体14c)には、端部14bの係合突起72を含む嵌合凸部71が挿入可能な鍵穴状の嵌合凹部73が軸線上に形成され、所定の挿入状態において、これらを軸廻りに相対回転させると、係合突起72の進入を受け入れる係止溝74が嵌合凹部73に設定される。
【0047】
係合突起72は、図11のように円筒形の嵌合凸部71の軸線(芯金14の軸線)を中心とする扇形に形成され、その扇面に係止溝74への係合動作に伴って係止溝74との係合面間の面圧を次第に上昇させる(つまり、係止溝74に係合突起72を締め付ける)テーパ75が形成される。テーパ75は、摩耗しにくい別部品76に成形され、これを係合突起72に結合することにより、扇面に付与されるのである。また、芯金本体14cにこれと別体の摩耗しにくいスリーブ77が収装され、嵌合凹部73および係止溝74はスリーブ77に設けられる。78は芯金本体14cにスリーブ77を固定するピンである。
【0048】
芯金端部14bの内部に蓄圧室80が形成され、角軸部14aの端面に開口する配管用コネクタ81に通路82を介して連通する一方、端部14bの分断面(スリーブ77の端面に対向する領域)に複数の通孔83を介して開口する。なお、端部14bにおける嵌合凸部71および係合突起72と、本体14cにおける嵌合凹部73および係止溝74と、によりこれらの間で軸廻りの相対回転に基づき、両者の軸方向への相対変位を拘束する係合状態と、同じく相対変位を許容する非係合状態と、に変換可能な手段が構成される。また、配管用コネクタ81に接続されるエアコンプレッサからの圧縮空気(高圧流体)は,通路82を介して蓄圧室80、さらに通孔83および本体14cとその端部14bとの分断面間の隙間85から芯金14とホース10bとの間に導かれる。
【0049】
初期状態において、芯金14にその端部14bは組み付けられる。つまり、嵌合凹部73に嵌合凸部71を挿入し、これらの相対回転により、係合突起72を係止溝74へ進入させる。テーパ75により、係合面間の面圧が上昇するため、端部14bを係合状態に締め込むと、簡単に非係合状態へ変換しないようになり、本体14cとその端部14bとの間でこれらの分断面が互いに隙間なく密着する。第3工程(c)において、この芯金14の挿入する生ホース10aに対し、第4工程(d)および第5工程(e)の処理が順次に行われ、第6工程(f)において、ホース間の分断(カット)後に蛇腹ホース10bを抜き取るのである。
【0050】
その場合、芯金本体14cを固定(クランプ)し、係合突起72と係止溝74との非係合状態へ芯金端部14bを回転させる。そして、バンド(図7、参照)により、端部14bの外周にホース10bを締め付ける。62は端部14bにバルジを形成する、断面略半円形の膨らみである。バンドの締め付け後は、図7の場合と同様の要領に基づき、エアコンプレッサの圧縮空気を芯金14とホース10bとの間に供給しながら、端部14bを軸方向へ引っ張ると、ホース10bが端部14bと一緒に抜き取れるのである。その際、芯金14とホース10bとの間に導かれる圧縮空気により、ホース10bは芯金14の外形から剥離して浮き上がる具合に膨れるので、大きな抵抗を受けることなく、芯金本体14cから容易に引き抜けるようになる。そして、ホース10bは、バンドを緩めて端部14bから抜き取られる。
【0051】
なお、図12は、第4工程(d)における、芯金14の挿入する生ホース10aを3本ロール機16(図2〜図4、参照)に掛けて蛇腹ホースの形状にくせ付けする態様を表すものであり、2本のロール16b,16cは、芯金14の挿入するホース10aを下方から支持するよう芯金14の両側にこれと平行に配置される。芯金14の挿入するホース10aは、これらロール16b,16cの中央上方から1本のロール16aに抑えられるのであり、3方向から押圧されながら、ロール16b,16cの回転を受けて逆方向へ回転するようになる。
【0052】
これによると、カプラ60(図7および図8、参照)を用いて芯金14とホース10bとの間に差し込む必要がなくなり、端材幅の低減(つまり、材料費の低減)が有効に促進しつつ、蛇腹ホース10bの端部(カフス部)の内径精度も高められる。また、図8の場合のように2種の治具(カプラ60および仮組治具64)を着脱するのに較べると、芯金14にその端部14bを着脱するのみで済むので、ホース10bの抜き取りに要する手間の簡略化が得られる。芯金14の端部14bは、着脱が容易に行えるよう、角軸部14aにネジ穴86が形成され、図示しない操作レバー(別途に用意される)が取付可能になっている。
【0053】
この場合、何らかの回転トルクが作用すると、芯金14とその端部14bとの間に軸廻りの相対回転を生じ、端部14bが勝手に外れてしまう可能性が考えられる。このため、図13においては、両者の相対回転を拘束する係合状態と、同じく許容する非係合状態と、に変換可能な手段(ロック機構)が備えられる。ロック機構は、芯金14に着脱可能な端部14bの外径部(スリーブ77端面に対向する部位)を軸方向へ延びる貫通穴88と、貫通穴88に摺動自在なピン89と、ピン89の先端部が係合可能なピン穴90(スリーブ77端面に形成される)と、からなり、貫通穴88の一方(ピン89の挿入側)の開口部が大径のネジ穴91に形成され、これに螺合するネジ溝92がピン89の後端部(頭部)外周に形成される。
【0054】
芯金14とその端部14bとの間で係止溝74に係合突起72が係合しきる所定の結合状態において、ピン穴90と貫通穴88は、同軸上に合致する位置関係に設定される。そして、貫通穴88に挿入されるピン89の頭部をネジ穴91に螺合すると、ピン89の先端部がこれと同軸上に合致するピン穴90に進入する係合状態となり、本体14cと端部14bとの間において、これら軸廻りの相対回転が拘束される。ホース10bを端部14bと一緒に本体14cから抜き取るときは、ネジ穴91の螺合を緩める方向へピン89を回すと、その先端部がピン穴90から後退する非係合状態となり、端部14bと本体14cとの相対回転が許容されるのである。
【0055】
図14および図15において、ロック機構(本体14cとその端部14bとの間において、これら軸廻りの相対回転を拘束する係合状態と、同じく許容する非係合状態と、に変換可能な手段)は、嵌合凹部73と嵌合凸部71との間で機能するように構成される。具体的には、嵌合凸部73に1対の板バネ93が1対の係止突起72と重なる(オーバラップする)位置関係に配設される。板バネ93は外径側へ山形に折り曲げられ、嵌合凸部71の外周に形成の平坦面94(取付面)に基端部93aで固定される。基端部93aの反対側は自由端93bになり、山形の折曲部93cが屈伸自在に構成される。
【0056】
鍵穴状の嵌合凹部73には、その小径部(係止突起72の通過を許容する部分を大径部とする)の内周において、板バネ93の係合凹部が所定位置に設定される。そして、板バネ93は、係止溝74に係止突起72が進入すると、嵌合凹部73の小径部に山形の折曲部が撓みながら乗り上げ、係合凹部に来ると弾性復帰して山形の折曲部が係止することになり、嵌合凸部71と嵌合凹部73との相対回転に規制力を及ぼすのである。この場合、図13のロック機構と異なり、芯金14とその端部14bとの隙間から圧縮空気が貫通穴88を介して外部へ漏れるのを防ぐシールが不要となる。
【0057】
図16および図17は、図9〜図11と同じ構想(芯金14からその端部14bをホース10bと一緒に抜き取れるように構成する)に基づく変形例を表すものである。芯金14は、カフスのくせ付け形状の中間において、軸と直交する平面で分割され、本体14cの分断面に有底筒形の別部材95が同軸上に結合(この場合、溶接)される。別部材95は、摩耗しにくい材質で形成され、底部の外面中央に小径軸部96が突設される。別部材95の開口部(本体14cの分断面と外径が同一の結合部)から底部側が嵌合凸部95aに形成され、この嵌合凸部95aに着脱可能な嵌合部材97(芯金端部の構成部材)が備えられる。
【0058】
嵌合部材97は有底筒形に形成され、別部材95の嵌合凸部95aへ組み付けやすく、筒形の内径が開口部から底部へ向けて次第に縮小するテーパ97aに設定される。別部材95の嵌合凸部95aは、嵌合部材97の内部に隙間なく嵌合するよう、嵌合部材97の内径形状(テーパ97a)に対応する外径形状95b(テーパ)に形成される。嵌合部材97の底部中央に円形の貫通穴97bが開口され、この貫通穴97bに嵌合する円形軸98が嵌合部材97と別体の角軸部14aに形成される。円形軸98の根本外周に係合溝99が形成され、円形軸98を貫通穴97bに嵌合すると共に半割カラー100の内径側を係合溝99に挿入し、各カラー100を嵌合部材97の底部外面にボルト101を介して締め付けることにより、角軸部14aが嵌合部材97に結合される。
【0059】
角軸部14aの内部を軸方向へ延びて円形軸98の端面中央に開口するネジ穴102が形成され、別部材95の小径軸部96の外周にネジ穴102に螺合するネジ溝が設けられる。そして、角軸部14aを嵌合部材97と一体に回すことにより、ネジ穴102に小径軸部96を螺合させると、嵌合部材97が別部材95の嵌合凸部95bを内部の奥方へ受け入れながら互いのテーパが密に嵌合し、嵌合部材97の外径形状(カフスのくせ付け形状)が本体14c端部の外径形状(カフスのくせ付け形状)と環状溝103を介して連なるようになる。
【0060】
本体14cの端部(別部材95を含む)の内部に蓄圧室80が形成され、小径軸部96を貫通する通路104および角軸部14aのネジ穴102を介して角軸部14aの端面に開口する配管用コネクタ81に連通する一方、別部材95の内部を複数の通孔105を介して環状溝103に開口する。つまり、配管用コネクタ81に接続されるエアコンプレッサからの圧縮空気(高圧流体)は,ネジ穴102および通路104を介して蓄圧室80、さらに通孔105および環状溝103を介して芯金14とホース10bとの間に導かれる。106は円形軸98と貫通穴97bとの隙間を密封するシールである。
【0061】
初期状態において、嵌合部材97および角軸部14aは、本体14cの別部材95に組み付けられる。第3工程(c)において、この芯金14の挿入する生ホース10aに対し、第4工程(d)および第5工程(e)の処理が順次に行われ、第6工程(f)において、ホース間の分断(カット)後に蛇腹ホース10bを抜き取るのである。そのときは、角軸部14aを回すことにより、小径軸部96とネジ穴102との螺合を解除する。角軸部14aと一体に回りながら、嵌合部材97が別部材95から後退する。そして、螺合の解除される位置において、バンド(図示せず)により、嵌合部材97の外周にホース10bを締め付けるのである。なお、嵌合部材97とホース10bとの密閉度を高めると共に、ホース10bを嵌合部材97に抜け止めするため、嵌合部材97の外周にバルジを形成する、断面略半円形の膨らみを与えると良い。
【0062】
バンドの締め付け後は、図7の場合と同様の要領に基づいて、エアコンプレッサの圧縮空気を芯金14とホース10bとの間に供給しながら、嵌合部材97および角軸部14aを軸方向へ引っ張ると、ホース10bがこれらと一緒に抜き取れるようになる。その際、芯金14とホース10bとの間に導かれる圧縮空気により、ホース10bは芯金14の外形から剥離して浮き上がる具合に膨れるので、大きな抵抗を受けることなく、本体14cから容易に引き抜けるのである。そして、ホース10bは、バンドを緩めて嵌合部材97から抜き取られる。
【0063】
これによると、カプラ60(図7および図8、参照)を用いて芯金14とホース10bとの間に差し込む必要がなくなり、図9〜図11の場合と同じく、端材幅の低減が有効に促進しつつ、蛇腹ホース10bの端部(カフス部)の内径精度も高められる。また、図8の場合に較べると、芯金14にその端部14bを着脱するのみで済むので、ホース10bの抜き取りに要する手間の簡略化が得られる。なお、図16および図17において、図示しないが、角軸部14aと小径軸部96との螺合およびその解除が容易に行えるよう、別途に用意される操作レバー(図示せず)を角軸部14aに装着するためのネジ穴(図9,図10、参照)が備えられる。
【図面の簡単な説明】
【図1】この発明の実施形態を表す製造工程の説明図である。
【図2】同じく3本ロール機の側面図である。
【図3】同じく3本ロール機の正面図である。
【図4】同じく包帯送りガイドの正面図である。
【図5】同じく多目的治具の構成図である。
【図6】同じく芯金およびロールの一部拡大図である。
【図7】同じくホースの抜き取りを説明する態様図である。
【図8】同じくホースの抜き取りを説明する態様図である。
【図9】同じくホースの抜き取りを説明する芯金の全体構成図である。
【図10】同じくホースの抜き取りを説明する芯金の一部構成図である。
【図11】同じくB断面図である。
【図12】同じくホースの成形(くせ付け)工程を説明する態様図である。
【図13】同じくロック機構を説明する構成図である。
【図14】同じく芯金の一部構成図である。
【図15】同じくC断面図である。
【図16】同じくホースの抜き取りを説明する芯金の一部構成図である。
【図17】同じくC矢視図である。
【図18】従来技術の説明図である。
【符号の説明】
10 生地
10a 生ホース
10b 加硫処理後のホース
11 円筒形の心棒
12 回転治具
14 芯金
14a 角軸部
14b 芯金端部
14c 芯金本体
15 クランプ装置
16 3本ロール機
40 多目的治具
52 環状凸部(環状突起)
60 カプラ
62 バンド(締め付け手段)
64 仮組治具
71 嵌合凸部
72 係合突起
73 嵌合凹部
74 係合溝
75 テーパ
80 蓄圧室
81 配管用コネクタ
85 隙間
89 ピン
90 ピン穴
91 ネジ穴
93 板バネ
95 別部材
96 小径軸部
97 嵌合部材
102 ネジ穴
103 環状溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a hose and a manufacturing apparatus.
[0002]
[Prior art]
A hose for high pressure and high temperature is conventionally manufactured by a process as shown in FIG. In the first step (cutting step), the fabric 1 on which the heat-resistant fiber is topped with the heat-resistant rubber is cut into a predetermined size. In the second step (raw hose making step), the dough 1 is wound around a cylindrical mandrel 2. At that time, the mandrel 2 is fixed with a vise, and in an intercooler hose of a large vehicle such as a truck, a single dough 1 is wound twice (two layers) and two layers of dough are used to form a four-layer raw hose 1a. make. In this operation, the dough 1 is wound around the mandrel 2 by hand while removing air between layers.
[0003]
In a 3rd process (insertion process to a metal core), the raw hose 1a is extracted from the cylindrical mandrel 2, and the metal core 3 having a crushed shape is inserted into the raw hose 1a. In the fourth step (taping step), a bandage 4 (tape) is wound around the cylindrical raw hose 1a so as to bring out the shape of the cored bar 3 attached. This taping is maintained for a predetermined time. Then, the bandage 4 is peeled off and the appearance of the bracing shape is confirmed. If the result is good, the bandage is wound again to fix the shape.
[0004]
In the fifth step (vulcanization step), the raw hose 1a (taping state) into which the core metal 3 is inserted is vulcanized in order to fix the shape of the hose. In the case of an intercooler hose such as a truck, the inlet side (high temperature and high pressure side) hose is made of silicon rubber for the cloth, and after steam vulcanization 5a (primary vulcanization), hot air vulcanization 5b (secondary vulcanization) is used. On the other hand, the outlet side (relatively low temperature and low pressure side) hose uses chloroprene rubber for the dough and only requires steam vulcanization 5a (primary vulcanization). In the sixth step (fixed cut step), the hose 1b is removed from the cored bar 3, and both ends are cut to match the length. In the seventh step, the product is inspected, and if it is OK, the product is completed.
[0005]
In Japanese Patent Laid-Open No. 9-94625, a related technique relating to such a hose is disclosed.
[0006]
[Problems to be solved by the invention]
In such a conventional method, most of the steps are performed manually by skilled workers, but for the work of extracting the hose from the core metal, particularly in the case of a high-pressure hose with a large wall thickness, (Unevenness) becomes a resistance, and it is difficult to get over these, and there is a problem that a great deal of labor is required.
[0007]
The present invention is intended to provide a method for manufacturing a hose and an apparatus therefor for the purpose of solving such problems.
[0008]
[Means for Solving the Problems]
The first invention is Raw hose made by wrapping dough Of a bottomed cylindrical coupler between a hose after vulcanization treatment and an end portion of the core metal. The step of inserting the opening, the step of tightening the hose on the outer periphery of the coupler, the hose while supplying the high pressure fluid from the inside of the coupler to the metal core and the hose by connecting the inside of the coupler to the high pressure fluid supply source Before the step of inserting the opening of the coupler between the hose and the cored bar. And a step of removing the temporary assembly jig from the end of the core bar and forming a gap for receiving the opening of the coupler between the core bar and the hose.
[0009]
The second invention is Raw hose made by wrapping dough Means for molding the core into a predetermined shape using a cored bar, means for fixing the shape by vulcanization, End of hose and core after vulcanization And a means for extracting the hose from the cored bar while supplying a high-pressure fluid therebetween, and the means for extracting the hose from the cored bar is capable of detaching its end in the axial direction from the cored bar. A means for coupling, an internal flow path for guiding a high-pressure fluid from a pipe connected to the end portion between the metal core and the hose, and a means for fastening the hose to the outer periphery of the end portion. The means for removably connecting the end portions in the axial direction is the same as the engagement state in which the relative displacement between the core metal and the end portions is restrained in the axial direction by relative rotation around these shafts. It is characterized by comprising an engaging means that can be converted into a non-engaging state that allows relative displacement in the axial direction.
[0010]
The third invention is According to the second invention In hose manufacturing equipment, The engaging means protrudes into a fan-shaped projection centered on the axis of the fitting convex portion on the outer periphery of the fitting convex portion centering on the axis of the fitting convex portion on the dividing line with the core metal at the end. An engagement protrusion and a fitting recess that opens to a cross section of the end of the cored bar, and the fitting recess includes an engagement protrusion including the engagement protrusion of the end in the axial direction. In the inserted state of the fitting convex part that is formed in the shape of a keyhole and includes the engaging projection at the end part, the end part is engaged by relative rotation to the engaged state around these axes between the end part and the cored bar. With a locking groove to accept the protrusion It is characterized by that.
[0011]
In the fourth invention, In the hose manufacturing apparatus according to the second or third aspect of the invention, the engaging means is provided between the engaging surfaces in accordance with relative rotation to the engaged state around the shaft between the end portion and the cored bar. The taper that increases the surface pressure of It is characterized by that.
[0012]
In the fifth invention, According to 2nd invention-4th invention In hose manufacturing equipment, Said The means for removably connecting the end to the core is: In a non-engagement state in which relative rotation around these shafts is allowed between the core metal and its end portion, and in an engagement state of the engagement means, between the core metal and its end portion around these shafts An engagement state that restrains relative rotation of the lock mechanism, and a lock mechanism that can be converted to It is provided with.
[0013]
In the sixth invention, according to the fifth invention In hose production equipment , The locking mechanism includes a pin that is inserted into an end portion so as to be able to advance and retreat through a screw hole in an axial direction, and a pin hole that is formed in a cored bar corresponding to the pin, and the engagement means is engaged. In this state, when the pin is rotated in the direction to advance the core, the tip of the pin enters the pin hole, and the relative rotation around the axis between the core and its end is restricted, while the pin is When turned in the opposite direction, the tip of the pin is disengaged from the pin hole, allowing relative rotation around the axis between the cored bar and its end. It is characterized by that.
[0014]
In the seventh invention, In the hose manufacturing apparatus according to the fifth aspect of the invention , The locking mechanism is configured such that a leaf spring that is bent in a mountain shape toward the outer diameter side is freely bent and stretched on the fitting convex portion at the end, and an engagement concave portion that locks the leaf spring is disposed in the fitting concave portion of the core metal, The leaf spring rides on the small-diameter portion of the keyhole-shaped fitting recess while the angled portion is bent by the relative rotation of the end portion and the metal core to the engagement state around the shaft, and the engagement. In the engaged state of the means, when it comes to the engagement recess, the angled bent portion is elastically restored and locked to the engagement recess. It is characterized by that.
[0015]
【The invention's effect】
In the first invention, Raw hose Is formed into a predetermined shape using a cored bar, and is fixed to the shape by vulcanization. Thereafter, the hose is extracted from the outer shape of the core metal while supplying a high-pressure fluid (for example, compressed air) to the core metal. At that time, the opening of the coupler is inserted from one end of the metal core between the metal core and the hose, and the hose is tightened on the outer periphery of the coupler so as not to leak high-pressure fluid (for example, compressed air). When a high pressure fluid is supplied to the inside of the coupler, the hose swells and lifts off from the outer shape of the core metal by the high pressure fluid guided between the opening of the coupler and the core metal. It can be easily pulled out without receiving resistance. Thereafter, the hose is loosened and removed from the outer periphery of the coupler. Since the cored bar is equipped with a removable temporary assembly jig at its end, when removing the hose from the cored bar, if the temporary assembly jig is removed from the end of the cored bar, the coupler will be placed between the cored bar and the hose. A gap is formed to receive the opening. For this reason, it becomes easy to insert the coupler, and it is not necessary to forcefully open the gap between the metal core and the hose, so that the inner surface of the hose is not damaged, and therefore the end material width corresponding to the insertion allowance of the coupler. Is not required to be set in advance in the raw hose, and the hose price (material cost) can be greatly reduced.
[0016]
In the second invention, Raw hose When the hose is removed from the core after the vulcanization treatment, the coupling is released so that the end of the core can be removed in the axial direction, and the hose is fastened to the outer periphery of the end. Then, while connecting a pipe to the end of the core bar and supplying a high-pressure fluid (for example, compressed air), the hose is pulled out of the core bar together with the end by pulling the end of the core bar in the axial direction. It can be taken. At that time, the hose swells and lifts off from the outer shape of the core metal by the high-pressure fluid guided between the core metal and the hose through the internal passage from the end of the core metal. You can easily pull out without receiving it. Thereafter, the hose is loosened and pulled out from the outer periphery of the end. Therefore, as a means for extracting the hose from the core metal, it is not necessary to insert the core metal and the hose using a coupler as in the first aspect of the invention. The inner diameter of the part (cuff part) can be accurately formed. Further, since the engaging means is provided, the end portion of the metal core is relatively rotated, so that it is possible to easily convert between the engaged state in which the end portion can be extracted in the axial direction and the non-engaged state in which the end portion cannot be extracted. .
[0017]
In the third invention, The engaging means inserts the fitting convex portion including the engaging protrusion at the end portion into the keyhole-shaped fitting concave portion of the core metal, and moves them in the direction of conversion to the engaged state between the core metal and the end portion. When the relative rotation is performed, the engagement protrusion at the end enters the locking groove of the cored bar, and the engagement state restricts the relative displacement in the axial direction between the cored bar and the end, and from this state the non-engaged state When the relative rotation is performed in the conversion direction, the engagement protrusion is removed from the locking groove, and the fitting protrusion including the engagement protrusion at the end can be pulled out from the keyhole-shaped fitting depression of the core bar in the axial direction. Become .
[0018]
In the fourth invention, Due to the taper, the contact pressure between the engagement surfaces increases with the conversion operation to the engagement state, that is, a tightening force acts on the engagement state. When it is tightened, it will not be easily converted to the non-engaged state, and it can be prevented that its end is detached from the cored bar. .
[0019]
In the fifth invention, By the lock mechanism, the relative rotation between the cored bar and its end can be restrained. For this reason, until the hose is removed from the metal core, even if rotational torque acts between the metal core and its end, the lock mechanism prevents relative rotation between the metal core and the end. Can prevent the end from coming off from the cored bar. .
[0020]
In the sixth invention, In the engaged state of the engaging means between the core metal and its end, the through hole and the pin hole are set in a positional relationship that coincides coaxially. Then, when the pin is screwed into the through hole through the screw hole, the tip end portion of the pin enters the pin hole that coaxially matches with the pin hole, and the shaft is inserted between the core metal and the end portion. The relative rotation around is restricted. When removing the hose from the metal core together with the end, if the pin is turned in the direction to loosen the screw hole, the tip of the pin is disengaged from the pin hole, and the metal core and the end 14b. Is allowed to rotate relative to the disengaged state of the engaging means. .
[0021]
In the seventh invention, When the engagement protrusion enters the locking groove, the leaf spring rides on the small-diameter portion of the fitting recess while the angled bent portion is bent, and when it reaches the engagement recess, the plate spring is elastically restored and the angled bent portion is engaged. In the engaged state of the engaging means, the restricting force is exerted on the relative rotation between the fitting convex portion and the fitting concave portion. .
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of the present invention. In this example, a method for manufacturing an intercooler hose (a bellows hose for high temperature and high pressure) employed in a large vehicle such as a truck will be described. In addition, although described about the hose which provided the bellows shape on the hose surface, application of this invention is not limited to a bellows hose.
[0023]
In the first step (a), the fabric 10 topped with heat-resistant rubber is cut into a predetermined size. In the second step (b), the dough 10 is wound around the cylindrical mandrel 11 to form the raw hose 10a. The cylindrical mandrel 11 is chucked by a rotating jig 12 and takes up the dough 10 with the rotational force of a motor 13 (an electric motor or a hydraulic motor). In this case, the fabric 10 cut into a length of four layers with a width of two is wound by an operator while removing air between layers by the rotational force of the rotating jig 12. Since the rotating jig 12 is used, compared with the conventional manual winding, the fabric 10 is distorted and both ends of the raw hose 10a are disturbed in a meandering manner, and the width of the end material is reduced when scaling. The effect that brings In addition, since one dough 10 is wound in four layers, waste of the overlapped portion (wrapped portion) of the dough 10 can be saved as compared to winding two doughs in two layers.
[0024]
In a 3rd process (c), the raw hose 10a is extracted from the cylindrical mandrel 11, and the metal core 14 provided with the bellows-like shape of the outer shape is inserted into the raw hose 10a. In order to fix the cored bar 14, a clamp device 15 is used, and the end of the cored bar 14 is tightened by the operation of the air cylinder 15a. The air cylinder 15a of the clamp device 15 is configured to be able to supply air (clamp operation) and discharge air (clamp release) by a pedal disposed at the foot of the operator. Since the two metal cores 14 are naturally longer than the one metal core, the insertion of the metal core 14 is more efficient than the conventional method of tightening the metal core with a vise. Can be processed. In addition, the burden on the operator is greatly reduced.
[0025]
In a 4th process (d), the raw hose 10a in which the core metal 14 is inserted is carried into the three-roll machine 16, and the shape of the bellows hose is set by the three rolls 16a to 16c. Further, taping for maintaining the bracing shape is performed by the feeding guide (see FIGS. 2 and 4) of the bandage 17 while rotating the cored bar 14 by the three-roll machine 16. In the fifth step (e), the bellows shape is fixed by vulcanization. In the case of the intercooler hose, the inlet side (high temperature and high pressure side) hose uses silicon rubber for the fabric, and after steam vulcanization (primary vulcanization), hot air vulcanization (secondary vulcanization) is performed, while the outlet The side (relatively low temperature and low pressure side) hose uses chloroprene rubber for the dough and requires only steam vulcanization (primary vulcanization). In the sixth step (f), bandage (taping) peeling and scaling (cutting) of the bellows hose 10b are performed using a multipurpose jig (see FIG. 5). Regarding the sizing, before extracting from the metal core 14, the end material widths at both ends are cut with respect to the two bellows hoses 10b, and the centers of the two are cut (cut). Although not shown, a final inspection is performed in the next step, and if it is OK, the product is completed. In the case of an intercooler hose, there are cases where bending is required for assembly due to layout restrictions, etc., and in order to give sufficient flexibility to straight tube-shaped products, the bellows-shaped mountain diameter (outside of the convex part) Is set larger than the outer diameter of the cuff part (straight pipe part at both ends of the hose).
[0026]
2 and 3 show the three-roll machine 16 used in the fourth step (d), and a box-shaped frame 19 (frame) is constructed on the base 20. In the frame 21, two rolls 16b and 16c arranged in parallel to the cored bar 14 so as to support the cored bar 14 from below on both sides of the axis of the cored bar 14 and the upper center between these rolls 16b and 16c. And a single roll 16a arranged in parallel with the cored bar 14 so as to hold the cored bar 14 down. The outer shape of each of the rolls 16a to 16c is set to the inverted shape of the cored bar 14. In order to rotate the rolls 16b and 16c synchronously, a motor 21 is disposed on the base 20, and a rotation transmission mechanism (gears 22a to 22d, chain 23) is provided between the rotating shaft 21a of the motor 21 and the ends of the rolls 16b and 16c. ) Is inserted. The roll 16a is supported by a subframe 26 that is movable in the vertical direction along guides 25 formed on both sides of the frame 19, and two air cylinders 27 that suspend the subframe 26 are attached to the ceiling (upper surface) of the frame. ). When these air cylinders 27 expand and contract synchronously, the roll 16 a moves up and down with respect to the core metal 14 by the movement of the subframe 26 along the guide 25.
[0027]
The drive circuit (not shown) of the air cylinder 27 has a valve that switches these expansion and contraction (operating direction) synchronously as required, and the operating pressure (air pressure) to these according to the progress of the work process. A means for controlling in stages is provided. Specifically, when the air cylinder 27 is actuated to the extension side by a drive command for the three rolls 16a to 16c, and the roll 16a suppresses the core metal 14 between the two rolls 16b and 16c from above, the motor The rolls 16b, 16c and 16a are rotated by the operation of 21. In the initial stage, the operating pressure of the air cylinder 27 is kept low, and is controlled to be higher when the next stage is reached. Accordingly, the rotational speed of the motor 21 may be controlled in the same manner.
[0028]
By using such a three-roll machine 16 in the fourth step (d), the raw hose 10a into which the core metal 14 is inserted is reversed from the rotation of the rolls 16b and 16c while being pressed from three directions. Rotate in the direction. For this reason, it is possible to efficiently and uniformly treat the hose 10a (raw hose before vulcanization treatment) into which the cored bar 14 is inserted without depending on the manual work of a skilled person. Further, the thrust of the air cylinder 27 and the load of the roll 16a are applied to the raw hose 10a from above while supporting the raw hose 10a (load) into which the metal core 14 is inserted from below by the two rolls 16b and 16c. The fastening force (molding force) can be secured efficiently and sufficiently. In addition, by controlling the operating pressure to the air cylinder 27 (and the rotational speed of the motor 21) as described above, the irregular shape of the bellows can be faithfully (curled) to the raw hose 10a without difficulty. it can.
[0029]
In FIG. 2, 30 is a taping for maintaining the shape after the completion of the brazing, and the bandage 17 wound around the raw hose 10a into which the core metal 14 rotating while being pressed by the three rolls 16a to 16c is inserted. As shown in FIG. 4, a pair of brackets 31 arranged on both sides of the front surface of the frame 19 have two rollers 30a and 30b vertically spaced apart from each other in parallel with the rolls 16a to 16c. Supported. A roller 30c that comes into contact with the two rollers 30a and 30b from the front is arranged in parallel with the rolls 16a to 16c, and a pair of sub brackets 33 that support the roller 30c are provided. The sub bracket 33 is supported by the tip of a stay damper 35 whose base end is pin-coupled above the bracket 31, and the expansion position of the damper 35 causes the roller 30c to contact the two rollers 30a and 30b and the two rollers. The roller 30c can be moved from 30a, 30b to a retreat position where the roller 30c is separated obliquely downward (the front surfaces of the rollers 16a to 16c are opened and closed). In addition, a clamp handle 36 for restraining and releasing the sub bracket 33 is provided at an operating position where the roller 30c contacts the two rollers 30a and 30b.
[0030]
The bandage 17 is rotated from the lower side of the roller 30b from the front to pass through the contact surface with the roller 30c, and the front of the roller 30c is passed through the contact surface with the roller 30a to provide three rolls 16a to 16c. And wind it around the raw hose 10a once. When the three-roll machine 16 is driven in this state, the raw hose 10a that rotates together with the cored bar 14 while being pressed from three directions comes into the bandage 17. The operator only has to feed the bandage along the rollers 30a to 30c in the axial direction in front of the feed guide 30 at an appropriate pitch speed, and the tension acts on the bandage 17 based on the winding on the three rolls 16a to 16c side. Therefore, the bellows shape can be firmly taped without imposing a heavy burden on the operator. In order to prevent wrinkles and twisting of the bandage 17, the rotation of the roll 16b is restricted.
[0031]
FIG. 5 shows a multipurpose jig 40 used in the sixth step (f), in which a motor 42 (an electric motor or a hydraulic motor) is installed on a machine base 41, and an end portion of a core metal 14 is provided on a rotating shaft thereof. Are provided. Bearings 44 and 45 that rotatably support the cored bar 14 are arranged coaxially with the rotating shaft of the motor 42. Among these, one is installed on the machine base 41, and the other is installed on the pedestal 46 that can move on the floor surface in order to cope with the difference in length of the cored bar 14. In the machine base 41, a jig base 48 is disposed that supports the cutter 47 so that the position of the cutter 47 can be adjusted in the axial direction of the cored bar 14 supported by the bearing 44. A guide rod 49 (which may be graduated for position display) projects from the bearing 44 toward the jig base 48 to guide the movement of the jig base 48 (position adjustment of the cutter 47). Further, the guide rod 49 is provided with an attaching portion 50 that can be restrained, and the cutter 47 is attached to the attaching portion 50 in a replaceable manner. When the mounting portion 50 is released from the restraint, the guide rod 49 can be freely slid and rotated, and the cutter 47 can be rotated downward and stored inside the jig table 48 when not in use.
[0032]
When the hose 10b (the hose after vulcanization) into which the core metal 14 is inserted is supported between the bearings 44 and 45 by such a multipurpose jig 40, taping can be easily performed while rotating the hose 10b in this state. It can be removed quickly. Thereafter, the end of the metal core 14 is coupled to the chuck 43 of the motor 42, and the hose 10b can be easily scaled by the cutter 47 while the hose 10b is rotated by the operation of the motor 42. Since positioning of the cored bar 14 is necessary for the sizing, a pin hole 51b corresponding to the pin hole 51a of the chuck 43 is provided at the end of the cored bar 14 for positioning into the pin holes 51a and 51b. Pins are provided.
[0033]
As for the core metal 14, an annular convex portion 52 (protrusion) having a predetermined width is formed at the boundary between the two hoses 10 b, and an annular concave portion 53 corresponding thereto is formed on each of the rolls 16 a to 16 c of the three-roll machine 16. Formed (see FIG. 3). FIG. 6 shows an annular convex portion 52 on the core metal 14 side and an annular concave portion 53 on the rolls 16a to 16c side. Even if the core bar 14 is damaged by the regular cutter 47, the damage when the two bellows hoses 10b are divided (cut) concentrates on the annular convex portion 52 having a predetermined width. For this reason, even if the inner surface of the hose 10b is marked due to reuse of the core metal 14, it is limited to a large diameter portion (a step portion corresponding to the annular convex portion 52 having a predetermined width) generated on the inner periphery of the end portion of the hose 10b. Therefore, the value and quality of the product are not impaired. Since the bellows hose 10b has large diameter portions on one side of both ends, it can be used as a mark in the assembling direction. Moreover, the effect that it becomes easy to assemble with respect to the insertion (pipe connector) side provided with a bulge by the large diameter part of the hose end part is obtained.
[0034]
The motor 42 is installed in the machine base 41, and the front part (leg part) by the side of the chuck | zipper 43 is mounted so that it can lift upwards by using a rear part (leg part) as a fulcrum like an arrow. As a result, the cored bar 14 coupled to the chuck 43 of the motor 42 is lifted upward, and the bellows hose 10b can be extracted from the cored bar 14 in a state where the cored bar 14 does not interfere with the bearings 44, 45 and the like. In the case of an intercooler hose, the rubber material is different between the inlet side and the outlet side. For the outlet side hose (chloroprene rubber), if the core metal 14 is hot (the amount of heat during vulcanization remains), the chuck 43 It is also possible to lift the coupling core 14 upward and insert the cylindrical raw hose 10a into it. In other words, the multipurpose jig can be effectively used not only for stripping the bandage and scaling, but also when extracting the bellows hose 10b from the cored bar or inserting the raw hose 10a into the cored bar 14.
[0035]
In the manufacturing method of FIG. 1, the three-roll machine 16 and the bandage feed guide means 30 are employed in the fourth step (d), and the multipurpose jig 40 is employed in the sixth step (f). In addition to being able to efficiently manufacture uniform bellows hoses with uniform quality, the burden on workers is greatly reduced. In addition, since a plurality of (two in this example) bellows hoses can be taken from one cored bar 14, the end material width between them can be accurately determined by cutting (cutting) between the hoses for scaling. It is also possible to set 0 to 0 (no cut). According to these results, an effect that a bellows hose for high temperature and high pressure such as an intercooler hose can be provided at a low cost can be obtained.
[0036]
The three-roll machine 16 makes it possible to wind the dough 10 around the core bar 14 using the feed guide means 30 of the bandage 17, and wrapping the dough 10 (making a raw hose) into a bellows shape and its It becomes possible to continuously process until taping into a shape. In that case, in the manufacturing method of FIG. 1, the third step (c) is omitted, and the bellows hose can be manufactured more efficiently. Further, the division (cut) between the hoses in the sizing may be performed before the vulcanization treatment in order to remove the air between the layers.
[0037]
FIG. 7 illustrates a method and means for extracting the bellows hose 10b from the cored bar 14 after cutting (cutting) between the hoses in the sixth step (f). Used. The coupler 60 has a bottomed cylindrical opening formed in an insertion portion 60a that can be inserted between the end portion (outer straight pipe shape portion) of the core metal 14 and the hose 10b. A supply source of high-pressure fluid (not shown) (in this case, an air compressor that sends out compressed air) is connected. The insertion portion 60a of the coupler 60 has a wedge-shaped tip, and a bulge (bulge 60c) is given to this outer diameter.
[0038]
The coupler 60 is pushed into the end portion of the core metal 14 from the axial direction, thereby causing an opening (insertion portion 60a) to enter between the core metal 14 and the hose 10b. In this state, the band 62 seals the gap between the hose 10b and the coupler 60 so that the compressed air does not escape to the outside. When the air compressor is driven, compressed air is supplied to the inside of the coupler 60 and is guided between the metal core 14 and the hose 10b through the insertion portion 60a.
[0039]
By this compressed air, the hose 10b is separated from the outer shape of the cored bar 14 and floated. But Therefore, when it is pulled together with the coupler 60 in the axial direction, it can be easily pulled out from the outer shape of the core bar 14 (particularly, the bellows shape) without receiving a great resistance. For removing the hose 10b remaining on the opposite side of the core metal 14, the chuck 42 of the motor 42 (see FIG. 5) is changed to the opposite side of the core metal 14, and then the coupler 60 is assembled in the same manner to supply compressed air. By doing so, it can be processed easily. Thereafter, the bellows hose 10b loosens the band 62 and is detached from the coupler 60.
[0040]
Since the coupler 60 is inserted so as to pry between the hose 10b when assembled to the core metal 14, the inner surface of the hose 10b may be damaged. For this reason, the end material width corresponding to the insertion allowance s of the coupler 60 is preset in the raw hose 10a, and the end material width s is cut (fixed cut) at the final stage of the sixth step (f). It is.
[0041]
For such an end material width s, it is desired to set these to 0 (no cut). For this reason, in FIG. 8, as a means for forming a gap for receiving the opening 60a of the coupler 60 between the metal core 14 and the hose 10b, a temporary assembly jig 64 that can be attached to and detached from the end of the metal core 14 is provided. Is provided. The temporary assembling jig 64 is formed in a bottomed cylindrical shape having an outer diameter shape (a cuffing shape) for forming an end portion (cuff portion) of the raw hose 10a, Core 14 The inner diameter of the cylinder is set to a taper 64a that gradually decreases from the sharp tip on the opening side toward the bottom. The end portion of the cored bar 14 is formed in an outer diameter shape corresponding to the inner diameter shape (taper 64a) of the jig 64 so as to fit into the temporary assembly jig 64 without a gap.
[0042]
A nut 64b is coupled to the center of the bottom portion of the temporary assembly jig 64, and a screw groove that is screwed into the screw hole is formed at a base portion of the square shaft portion 14a (chucked by the motor 42 or the like) of the core metal. Reference numeral 60 denotes a coupler, and the opening (insertion portion 60a) is set to an outer diameter substantially equal to the inner diameter of the end (cuff portion) of the hose 10b. 60b is a piping connector connected to the air compressor, and 62 is a band for fastening the hose 10b to the outer periphery of the coupler 60. It should be noted that an annular recess 66 for releasing the contact of the tip of the coupler 60 (wedge shape with a bulge 60c) at the end of the core metal 14 has an outer diameter shape (taper) corresponding to the inner diameter shape of the temporary assembly jig 64. 67).
[0043]
The temporary assembly jig 64 is assembled to the end portion of the core metal 14 in the initial state, and gives a straight pipe shape (the shape of the cuff portion) to both end portions of the raw hose 10a in the fourth step (d). After the vulcanization process of the fifth step (e), when the bellows hose 10b is extracted from the cored bar 14 in the sixth step (f), the nut 64b screwed to the square shaft portion 14a is loosened, and the temporary assembly jig 64 Is removed from the end of the cored bar 14, a gap (a trace from which the jig 64 has been removed) is formed between the cored bar 14 and the hose 10b. The opening 60a of the coupler 60 is inserted into this gap, and the subsequent processing is performed in the same manner as in FIG.
[0044]
As described above, since the removable temporary assembly jig 64 is provided at the end of the core metal 14, when the hose 10 b is extracted from the core metal 14, the core metal 14 and the hose are generated by the gap generated when the temporary assembly jig 64 is removed. The coupler 60 can be easily inserted between the hose 10b and the inner surface of the hose 10b is not damaged. Therefore, the end material width corresponding to the insertion allowance s (see FIG. 7) of the coupler 60 does not have to be set in advance in the raw hose 10a, and the effect that the cost (material cost) of the product can be reduced is obtained.
[0045]
In this example, it is necessary to attach and detach the temporary assembly jig 64 in addition to the attachment and detachment of the coupler 60. For this reason, in FIGS. 9 to 11, the end portion 14 b of the metal core 14 is divided from the boundary between the accordion shape of the bellows and the cuff shape, and can be removed in the axial direction via the conversion means described later. Combined with A stepped portion 70 is provided on the outer periphery of the end portion 14b, and the small diameter side including the stepped surface has a cuffed shape. In addition, the stepped portion 70 is configured in two steps, and a large diameter portion (wide mouth portion) is provided on the inner periphery of the hose end portion (cuff portion) similarly to the annular convex portion 52 (see FIG. 6) in the middle of the core metal. It is supposed to be.
[0046]
A cylindrical fitting convex portion 71 is provided on the divided section of the end portion 14b so as to protrude coaxially with the opposite angular shaft portion 14a, and a pair of engaging projections 72 are formed at predetermined positions on the outer periphery thereof. . A keyhole-like shape into which a fitting convex portion 71 including an engaging protrusion 72 of the end portion 14b can be inserted on the side of the cross section with the end portion 14b (core metal body 14c). Fitting recess 73 Are formed on the axis, and in a predetermined insertion state, when these are rotated relative to each other around the axis, a locking groove 74 for receiving the entry of the engaging protrusion 72 is set in the fitting recess 73.
[0047]
As shown in FIG. 11, the engagement protrusion 72 is formed in a sector shape centered on the axis line of the cylindrical fitting convex portion 71 (the axis line of the cored bar 14), and engages with the engagement groove 74 on the fan surface. Accordingly, a taper 75 that gradually increases the surface pressure between the engagement surfaces with the locking groove 74 (that is, tightens the engagement protrusion 72 in the locking groove 74) is formed. The taper 75 is formed into a separate part 76 that is not easily worn, and is attached to the fan surface by coupling it to the engagement protrusion 72. In addition, a sleeve 77 that is hard to be worn separately from the core metal main body 14 c is accommodated, and the fitting recess 73 and the locking groove 74 are provided in the sleeve 77. Reference numeral 78 denotes a pin for fixing the sleeve 77 to the cored bar body 14c.
[0048]
A pressure accumulating chamber 80 is formed inside the cored bar end portion 14b, and communicates with the piping connector 81 that opens at the end face of the square shaft portion 14a through the passage 82, while the sectional surface of the end portion 14b (on the end face of the sleeve 77). It opens in the opposing area | region through the several through-hole 83. FIG. In addition, the fitting convex part 71 and the engaging protrusion 72 in the end part 14b, and the fitting concave part 73 and the locking groove 74 in the main body 14c, based on relative rotation around the axis between them, in the axial direction of both. Means that can be converted into an engaged state that restrains the relative displacement and a non-engaged state that also allows the relative displacement are configured. Compressed air (high-pressure fluid) from an air compressor connected to the piping connector 81 passes through the passage 82, and the gap between the accumulator 80, the through-hole 83, the main body 14c, and the end 14b. From 85, it is led between the cored bar 14 and the hose 10b.
[0049]
In the initial state, the end portion 14 b is assembled to the cored bar 14. That is, the fitting projection 71 is inserted into the fitting recess 73, and the engagement protrusion 72 is caused to enter the locking groove 74 by relative rotation thereof. Since the surface pressure between the engaging surfaces increases due to the taper 75, when the end portion 14b is tightened to the engaged state, it is not easily converted to the non-engaged state, and the main body 14c and the end portion 14b are not converted. These partial cross sections closely contact each other without any gaps. In the third step (c), the fourth step (d) and the fifth step (e) are sequentially performed on the raw hose 10a into which the core metal 14 is inserted. In the sixth step (f), The bellows hose 10b is extracted after the hose is divided (cut).
[0050]
In that case, the cored bar main body 14c is fixed (clamped), and the cored bar end part 14b is rotated to the disengaged state between the engaging protrusion 72 and the locking groove 74. Then, the hose 10b is fastened to the outer periphery of the end portion 14b with a band (see FIG. 7). Reference numeral 62 denotes a bulge having a substantially semicircular cross section that forms a bulge at the end 14b. After tightening the band, if the end portion 14b is pulled in the axial direction while supplying the compressed air of the air compressor between the metal core 14 and the hose 10b based on the same procedure as in FIG. It can be removed together with the end 14b. At that time, the compressed air guided between the cored bar 14 and the hose 10b swells as if the hose 10b peels off from the outer shape of the cored bar 14 and floats up. To come out. Then, the hose 10b is pulled out from the end portion 14b by loosening the band.
[0051]
In addition, FIG. 12 is the aspect which hung the raw hose 10a in which the core metal 14 is inserted in the fourth step (d) on the three-roll machine 16 (see FIGS. 2 to 4) to form the bellows hose. The two rolls 16b and 16c are arranged in parallel to both sides of the core bar 14 so as to support the hose 10a into which the core bar 14 is inserted from below. The hose 10a into which the core metal 14 is inserted is restrained by a single roll 16a from above the center of the rolls 16b and 16c, and rotates in the opposite direction under the rotation of the rolls 16b and 16c while being pressed from three directions. To come.
[0052]
According to this, it is not necessary to insert between the metal core 14 and the hose 10b using the coupler 60 (see FIGS. 7 and 8), and the reduction of the end material width (that is, the reduction of the material cost) is effectively promoted. However, the inner diameter accuracy of the end portion (cuff portion) of the bellows hose 10b is also improved. Further, compared to attaching and detaching two types of jigs (coupler 60 and provisional assembly jig 64) as in the case of FIG. 8, it is only necessary to attach and detach the end portion 14b to the core metal 14, and thus the hose 10b. Simplification of the labor required for extraction of the material can be obtained. A screw hole 86 is formed in the square shaft portion 14a so that the end portion 14b of the core metal 14 can be easily attached and detached, and an operation lever (not shown) can be attached.
[0053]
In this case, when some rotational torque is applied, there is a possibility that relative rotation around the shaft occurs between the metal core 14 and the end portion 14b, and the end portion 14b may come off arbitrarily. For this reason, in FIG. 13, a means (lock mechanism) that can be converted into an engaged state that restricts relative rotation between the two and a disengaged state that is also allowed is provided. The lock mechanism includes a through-hole 88 extending in the axial direction at an outer diameter portion (a portion facing the end surface of the sleeve 77) of the end portion 14b detachable from the core metal 14, a pin 89 slidable in the through-hole 88, a pin And a pin hole 90 (formed on the end surface of the sleeve 77) with which the tip of 89 can be engaged, and an opening on one side of the through hole 88 (on the insertion side of the pin 89) is formed in the large-diameter screw hole 91. Then, a screw groove 92 is formed on the outer periphery of the rear end (head) of the pin 89 to be screwed therewith.
[0054]
In a predetermined coupling state in which the engagement protrusion 72 is fully engaged with the engagement groove 74 between the core metal 14 and its end portion 14b, the pin hole 90 and the through hole 88 are set in a positional relationship that coincides on the same axis. The Then, when the head of the pin 89 inserted into the through hole 88 is screwed into the screw hole 91, the tip end portion of the pin 89 enters the pin hole 90 that coincides coaxially therewith, and the main body 14c Relative rotation around these axes is constrained between the end 14b. When the hose 10b is removed from the main body 14c together with the end portion 14b, if the pin 89 is turned in the direction of loosening the screw hole 91, the tip end portion thereof is disengaged from the pin hole 90, and the end portion Relative rotation between 14b and the main body 14c is allowed.
[0055]
14 and 15, the lock mechanism (means that can be converted into an engaged state that restricts relative rotation around the shaft between the main body 14c and its end portion 14b and an allowable non-engaged state. ) Is configured to function between the fitting recess 73 and the fitting protrusion 71. Specifically, a pair of leaf springs 93 are disposed on the fitting convex portion 73 so as to overlap (overlap) the pair of locking protrusions 72. The leaf spring 93 is bent in a mountain shape toward the outer diameter side, and fixed to a flat surface 94 (attachment surface) formed on the outer periphery of the fitting convex portion 71 by a base end portion 93a. The opposite side of the base end portion 93a is a free end 93b, and a mountain-shaped bent portion 93c is configured to be able to bend and stretch.
[0056]
In the keyhole-shaped fitting recess 73, the engagement recess of the leaf spring 93 is set at a predetermined position on the inner periphery of the small-diameter portion (the portion allowing passage of the locking protrusion 72 is the large-diameter portion). . Then, when the locking projection 72 enters the locking groove 74, the leaf spring 93 rides on the small-diameter portion of the fitting recess 73 while the mountain-shaped bent portion is bent, and when it comes to the engagement recess, the plate spring 93 is elastically restored and has a mountain shape. The bent portion is locked, and a regulating force is exerted on the relative rotation between the fitting convex portion 71 and the fitting concave portion 73. In this case, unlike the locking mechanism of FIG. 13, a seal that prevents the compressed air from leaking outside through the through hole 88 from the gap between the metal core 14 and its end portion 14 b becomes unnecessary.
[0057]
FIGS. 16 and 17 show a modification based on the same concept as FIGS. 9 to 11 (configured so that the end portion 14b of the metal core 14 can be removed together with the hose 10b). The cored bar 14 is divided by a plane perpendicular to the axis in the middle of the cuffing shape, and a bottomed cylindrical separate member 95 is coaxially coupled to the dividing surface of the main body 14c (in this case, welded). . The separate member 95 is formed of a material that does not easily wear, and a small diameter shaft portion 96 projects from the center of the outer surface of the bottom portion. The bottom side is formed in the fitting convex part 95a from the opening part (joint part with the same outer diameter as the partial cross section of the main body 14c) of the separate member 95, The fitting member 97 (core metal) which can be attached or detached to this fitting convex part 95a End component).
[0058]
The fitting member 97 is formed in a bottomed cylindrical shape, is easily assembled to the fitting convex portion 95a of the separate member 95, and the cylindrical inner diameter is set to a taper 97a that gradually decreases from the opening portion toward the bottom portion. The fitting convex portion 95a of the separate member 95 is formed in an outer diameter shape 95b (taper) corresponding to the inner diameter shape (taper 97a) of the fitting member 97 so as to fit into the fitting member 97 without a gap. . A circular through hole 97b is opened at the center of the bottom of the fitting member 97, and a circular shaft 98 that fits into the through hole 97b is formed in the angular shaft portion 14a that is separate from the fitting member 97. An engagement groove 99 is formed on the base outer periphery of the circular shaft 98, the circular shaft 98 is fitted into the through hole 97b, and the inner diameter side of the half collar 100 is inserted into the engagement groove 99, and each collar 100 is fitted to the fitting member. The square shaft portion 14 a is coupled to the fitting member 97 by tightening the outer surface of the bottom portion 97 with bolts 101.
[0059]
A screw hole 102 that extends in the axial direction inside the rectangular shaft portion 14a and opens at the center of the end surface of the circular shaft 98 is formed, and a screw groove that is screwed into the screw hole 102 is provided on the outer periphery of the small-diameter shaft portion 96 of the separate member 95. It is done. Then, when the small-diameter shaft portion 96 is screwed into the screw hole 102 by rotating the square shaft portion 14a integrally with the fitting member 97, the fitting member 97 causes the fitting convex portion 95b of the separate member 95 to move to the inner side. The taper of the fitting member 97 is closely fitted with each other, and the outer diameter shape (cuffed shape of the cuff) of the fitting member 97 is interposed between the outer diameter shape (cuffed shape of the cuff) and the annular groove 103. Will be connected.
[0060]
A pressure accumulating chamber 80 is formed inside the end portion (including the separate member 95) of the main body 14c, and is formed on the end surface of the angular shaft portion 14a through the passage 104 passing through the small diameter shaft portion 96 and the screw hole 102 of the rectangular shaft portion 14a. While communicating with the opening pipe connector 81, the inside of the separate member 95 is opened to the annular groove 103 through the plurality of through holes 105. That is, the compressed air (high pressure fluid) from the air compressor connected to the pipe connector 81 passes through the screw hole 102 and the passage 104, the pressure accumulation chamber 80, and the core hole 14 via the through hole 105 and the annular groove 103. It is led between the hose 10b. A seal 106 seals the gap between the circular shaft 98 and the through hole 97b.
[0061]
In the initial state, the fitting member 97 and the square shaft portion 14a are assembled to another member 95 of the main body 14c. In the third step (c), the fourth step (d) and the fifth step (e) are sequentially performed on the raw hose 10a into which the core metal 14 is inserted. In the sixth step (f), The bellows hose 10b is extracted after the hose is divided (cut). At that time, the screwing of the small diameter shaft portion 96 and the screw hole 102 is released by turning the square shaft portion 14a. The fitting member 97 moves backward from the separate member 95 while rotating integrally with the angular shaft portion 14a. The hose 10b is fastened to the outer periphery of the fitting member 97 by a band (not shown) at a position where the screwing is released. In addition, in order to increase the sealing degree between the fitting member 97 and the hose 10b and to prevent the hose 10b from coming off from the fitting member 97, a bulge is formed on the outer periphery of the fitting member 97 to give a bulge having a substantially semicircular cross section. And good.
[0062]
After the band is tightened, the fitting member 97 and the square shaft portion 14a are axially moved while supplying the compressed air of the air compressor between the metal core 14 and the hose 10b based on the same procedure as in FIG. The hose 10b can be pulled out together with these. At that time, the compressed air guided between the cored bar 14 and the hose 10b causes the hose 10b to swell from the outer shape of the cored bar 14 so that the hose 10b is lifted up, so that it can be easily pulled out from the main body 14c without receiving a large resistance. It is. Then, the hose 10b is pulled out of the fitting member 97 by loosening the band.
[0063]
According to this, it is not necessary to insert between the metal core 14 and the hose 10b using the coupler 60 (see FIGS. 7 and 8), and the reduction of the end material width is effective as in the case of FIGS. The inner diameter accuracy of the end portion (cuff portion) of the bellows hose 10b is also improved. Further, as compared with the case of FIG. 8, it is only necessary to attach and detach the end portion 14 b to the core metal 14, so that the labor required for removing the hose 10 b can be simplified. In FIGS. 16 and 17, although not shown, a separate operating lever (not shown) is attached to the square shaft so that the square shaft portion 14a and the small diameter shaft portion 96 can be easily screwed and released. A screw hole (see FIGS. 9 and 10) for mounting on the portion 14a is provided.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a manufacturing process representing an embodiment of the present invention.
FIG. 2 is a side view of the same three-roll machine.
FIG. 3 is a front view of the three-roll machine.
FIG. 4 is a front view of the bandage feed guide.
FIG. 5 is a configuration diagram of a multipurpose jig.
FIG. 6 is a partially enlarged view of a cored bar and a roll.
FIG. 7 is a view for explaining the extraction of the hose.
FIG. 8 is a view for explaining extraction of the hose.
FIG. 9 is an overall configuration diagram of a cored bar for explaining extraction of a hose.
FIG. 10 is a partial configuration diagram of a cored bar for explaining extraction of the hose.
FIG. 11 is also a B cross-sectional view.
FIG. 12 is a view for explaining a hose forming (crease) process.
FIG. 13 is a configuration diagram for similarly explaining a locking mechanism.
FIG. 14 is a partial configuration diagram of the cored bar.
FIG. 15 is a C sectional view of the same.
FIG. 16 is a partial configuration diagram of a cored bar for explaining extraction of the hose.
FIG. 17 is a view taken in the same direction of arrow C.
FIG. 18 is an explanatory diagram of a conventional technique.
[Explanation of symbols]
10 dough
10a Raw hose
10b Hose after vulcanization
11 Cylindrical mandrel
12 Rotating jig
14 Core
14a Square shaft
14b Core end
14c cored bar body
15 Clamping device
16 3 roll machine
40 Multipurpose jig
52 Annular projection (annular protrusion)
60 coupler
62 Band (clamping means)
64 Temporary assembly jig
71 Mating convex
72 Engagement protrusion
73 Fitting recess
74 Engagement groove
75 taper
80 Pressure storage chamber
81 Piping connector
85 Clearance
89 pins
90 pin hole
91 Screw hole
93 leaf spring
95 Separate parts
96 Small diameter shaft
97 Fitting member
102 Screw hole
103 annular groove

Claims (7)

生地を巻き付けて作られる生ホースを所定形状に芯金を用いて成形する工程と、その形状を加硫処理で定着化させる工程と、加硫処理後のホースと芯金の端部との間に有底筒形のカプラの開口部を挿入する工程と、カプラの外周にホースを締め付ける工程と、高圧流体の供給源にカプラの内部を接続してカプラの内部から芯金とホースとの間に高圧流体を供給しながらホースを芯金から抜き取る工程と、を備え、芯金はその端部に着脱可能な仮組治具を備えるものが用いられ、カプラの開口部をホースと芯金との間に挿入する工程の前に芯金の端部から仮組治具を外して芯金とホースとの間にカプラの開口部を受け入れる空隙を形成する工程と、を備えることを特徴とするホースの製造方法。A step of forming a raw hose made by winding the dough into a predetermined shape using a core, a step of fixing the shape by vulcanization, and a portion between the hose after vulcanization and the end of the core The step of inserting the opening of the bottomed cylindrical coupler, the step of tightening the hose on the outer periphery of the coupler, and connecting the inside of the coupler to the high pressure fluid supply source between the core and the hose from the inside of the coupler Removing the hose from the cored bar while supplying a high-pressure fluid to the cored bar, wherein the cored bar is provided with a temporary assembly jig that can be attached and detached at its end, and the coupler opening is connected to the hose and the cored bar. Removing the temporary assembly jig from the end of the core metal before the step of inserting between the core metal and forming a gap for receiving the opening of the coupler between the core metal and the hose. Hose manufacturing method. 生地を巻き付けて作られる生ホースを所定形状に芯金を用いて成形する手段と、その形状を加硫処理で定着化させる手段と、加硫処理後のホースと芯金の端部との間に高圧流体を供給しながらホースを芯金から抜き取る手段と、を備えるホースの製造装置において、前記ホースを芯金から抜き取る手段は、芯金にその端部を軸方向へ取り外し可能に結合する手段と、この端部に接続される配管から高圧流体を芯金とホースとの間に導く内部流路と、同じく端部の外周にホースを締め付ける手段と、を備え、前記芯金にその端部を軸方向へ取り外し可能に結合する手段は、芯金とその端部との間でこれらの軸廻りの相対回転により、両者の軸方向へ相対変位を拘束する係合状態と、同じく軸方向への相対変位を許容する非係合状態と、に変換可能な係合手段と、を備えたことを特徴とするホースの製造装置。A means for forming a raw hose made by wrapping the dough into a predetermined shape using a core, a means for fixing the shape by vulcanization, and a space between the hose after vulcanization and the end of the core Means for pulling the hose from the cored bar while supplying a high-pressure fluid to the cored bar, wherein the means for extracting the hose from the cored bar is detachably coupled to the cored bar in the axial direction. An internal flow path for guiding a high-pressure fluid from a pipe connected to the end portion between the metal core and the hose, and means for fastening the hose to the outer periphery of the end portion, The means for removably connecting the two in the axial direction includes an engagement state in which relative displacement between the metal core and its end portion is restricted relative to each other by the relative rotation around these axes, and also in the axial direction. Can be converted to a non-engaged state that allows relative displacement of Hose manufacturing apparatus characterized by comprising engaging means, such. 前記係合手段は、端部の芯金との分断面にその軸線を中心とする円筒形に突出する嵌合凸部と、その外周に嵌合凸部の軸線を中心とする扇形に突出する係合突起と、芯金の端部との分断面に開口する嵌合凹部と、を備え、嵌合凹部は、端部の係合凸部を含む嵌合凸部が軸方向へ挿入可能な鍵穴状に形成され、端部の係合突起を含む嵌合凸部の挿入状態において、端部と芯金との間でこれら軸廻りの係合状態への相対回転により、端部の係合突起の進入を受け入れる係止溝を備えたことを特徴とする請求項2に係るホースの製造装置。The engaging means protrudes into a fan-shaped projection centered on the axis of the fitting convex portion on the outer periphery of the fitting convex portion centering on the axis of the fitting convex portion on the dividing line with the core metal at the end. An engagement protrusion and a fitting recess that opens to a cross section of the end of the cored bar, and the fitting recess includes an engagement protrusion including the engagement protrusion of the end in the axial direction. In the inserted state of the fitting convex part that is formed in the shape of a keyhole and includes the engaging projection at the end part, the end part is engaged by relative rotation to the engaged state around these axes between the end part and the cored bar. The hose manufacturing apparatus according to claim 2, further comprising a locking groove for receiving the protrusion. 前記係合手段は、端部と芯金との間でこれら軸廻りの係合状態への相対回転に伴って係合面間の面圧を上昇させるテーパを設定したことを特徴とする請求項2または請求項3に係るホースの製造装置。2. The taper according to claim 1, wherein the engagement means has a taper that increases the surface pressure between the engagement surfaces with relative rotation to the engagement state around the shaft between the end portion and the metal core. A hose manufacturing apparatus according to claim 2 or claim 3. 前記芯金にその端部を取り外し可能に結合する手段は、芯金とその端部との間でこれらの軸廻りの相対回転を許容する非係合状態と、前記係合手段の係合状態において、芯金とその端部との間でこれらの軸廻りの相対回転を拘束する係合状態と、に変換可能なロック機構と、を備えたことを特徴とする請求項2〜請求項4の何れか1つに係るホースの製造装置。The means for removably coupling the end part to the cored bar includes a non-engaged state allowing relative rotation around the shaft between the cored bar and the end part, and an engaged state of the engaging means And a lock mechanism that can be converted into an engaged state in which relative rotation between the metal core and its end is restricted. A hose manufacturing apparatus according to any one of the above. 前記ロック機構は、端部に軸方向へネジ穴を介して進退可能に挿入されるピンと、このピンに対応して芯金に形成されるピン穴と、を備え、前記係合手段の係合状態において、ピンを芯金側へ進める方向へ回すと、ピンの先端部がピン穴に進入する係合状態となり、芯金とその端部との軸廻りの相対回転を拘束する一方、ピンを逆方向へ回すと、ピンの先端部がピン穴から後退する非係合状態となり、芯金とその端部との軸廻りの相対回転を許容することを特徴とする請求項5に係るホースの製造装置。The locking mechanism includes a pin that is inserted into an end portion so as to be able to advance and retreat through a screw hole in an axial direction, and a pin hole that is formed in a cored bar corresponding to the pin, and the engagement means is engaged. In this state, when the pin is rotated in the direction to advance the core, the tip of the pin enters the pin hole, and the relative rotation around the axis between the core and its end is restricted, while the pin is 6. The hose according to claim 5, wherein when the pin is turned in the reverse direction, the tip end portion of the pin is disengaged from the pin hole to disengage, and relative rotation about the axis between the core metal and its end portion is allowed. Manufacturing equipment. 前記ロック機構は、端部の嵌合凸部に外径側へ山形に折り曲げられる板バネが屈伸自在に構成され、板バネを係止する係合凹部が芯金の嵌合凹部に配置され、前記板バネは、端部と芯金との間でこれら軸廻りの係合状態への相対回転により、鍵穴状の嵌合凹部の小径部に山形の折曲部が撓みながら乗り上げ、前記係合手段の係合状態において、係合凹部に来ると、山形の折曲部が弾性復帰して係合凹部に係止されることを特徴とする請求項5に係るホースの製造装置。The locking mechanism is configured such that a leaf spring that is bent in a mountain shape toward the outer diameter side is freely bent and stretched on the fitting convex portion at the end, and an engagement concave portion that locks the leaf spring is disposed in the fitting concave portion of the core metal, The leaf spring rides on the small-diameter portion of the keyhole-shaped fitting recess while the angled portion is bent by the relative rotation of the end portion and the metal core to the engagement state around the shaft, and the engagement. 6. The hose manufacturing apparatus according to claim 5, wherein, when the means is engaged, the mountain-shaped bent portion is elastically restored and locked to the engagement recess when the engagement recess is reached.
JP2001008826A 2001-01-17 2001-01-17 Hose manufacturing method and apparatus Expired - Fee Related JP4509400B2 (en)

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JP6728538B2 (en) * 2018-06-27 2020-07-22 信越ポリマー株式会社 Coating material and manufacturing method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128681A (en) * 1977-04-15 1978-11-09 Yamauchi Rubber Ind Co Ltd Method for reroving core in manufacture of cylindrical elastics
JPS56143034U (en) * 1980-03-28 1981-10-28
JPH0642149U (en) * 1992-11-26 1994-06-03 豊田合成株式会社 Hose removal device
JPH06270157A (en) * 1993-03-23 1994-09-27 Nichigou Shoji Kk Method and apparatus for extraction of mandrel
JPH09207143A (en) * 1996-01-31 1997-08-12 Tokai Rubber Ind Ltd Mandrel and manufacture of rubber hose using the mandrel
JPH11277547A (en) * 1998-03-31 1999-10-12 Marugo Rubber Ind Co Ltd Apparatus for removing rubber hose from inner mold

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128681A (en) * 1977-04-15 1978-11-09 Yamauchi Rubber Ind Co Ltd Method for reroving core in manufacture of cylindrical elastics
JPS56143034U (en) * 1980-03-28 1981-10-28
JPH0642149U (en) * 1992-11-26 1994-06-03 豊田合成株式会社 Hose removal device
JPH06270157A (en) * 1993-03-23 1994-09-27 Nichigou Shoji Kk Method and apparatus for extraction of mandrel
JPH09207143A (en) * 1996-01-31 1997-08-12 Tokai Rubber Ind Ltd Mandrel and manufacture of rubber hose using the mandrel
JPH11277547A (en) * 1998-03-31 1999-10-12 Marugo Rubber Ind Co Ltd Apparatus for removing rubber hose from inner mold

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