JP2004225763A - Reinforced flexible hose - Google Patents

Reinforced flexible hose Download PDF

Info

Publication number
JP2004225763A
JP2004225763A JP2003012379A JP2003012379A JP2004225763A JP 2004225763 A JP2004225763 A JP 2004225763A JP 2003012379 A JP2003012379 A JP 2003012379A JP 2003012379 A JP2003012379 A JP 2003012379A JP 2004225763 A JP2004225763 A JP 2004225763A
Authority
JP
Japan
Prior art keywords
hose
connection end
outer tube
cylindrical cap
reinforcing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003012379A
Other languages
Japanese (ja)
Inventor
Masaji Miyamura
正司 宮村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyox Co Ltd
Original Assignee
Toyox Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyox Co Ltd filed Critical Toyox Co Ltd
Priority to JP2003012379A priority Critical patent/JP2004225763A/en
Publication of JP2004225763A publication Critical patent/JP2004225763A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Rigid Pipes And Flexible Pipes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforced flexible hose using no vinyl chloride while improving its transparency, durability and quality. <P>SOLUTION: An inner tube 1, a reinforcing body 2 and an outer tube 3 are all formed of a polyurethane resin or a urethane elastomer. Thus, the inner tube 1, the reinforcing body 2 and the outer tube 3 have highly adhesive strength with one another, eliminating the possible permeation of water entering into the outer pipe 3 and the reinforcing body 2 because of no water absorbing property and the possible cracking in portions of the inner tube 1 and the outer tube 3 not adhered to the reinforcing body 2, even if bent in use. Still, the shower hose has heat resistance and an wear resistance. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、例えばシャワーホースとして浴室などのような高温多湿な場所で使用され、しかも少なくとも外表面が透明な可撓性補強ホースに関する。
詳しくは、軟質合成樹脂製の内管の外側に、硬質又は半硬質合成樹脂製の補強体を螺旋状に巻着し、この補強体の外側に透明な軟質合成樹脂製の外管を被着した可撓性補強ホースに関する。
【0002】
【従来の技術】
従来、この種の可撓性補強ホースとして、内管及び外管を塩化ビニル樹脂で形成し、これらの間に所定ピッチで螺旋状に配置される補強体を、上記内管及び外管との接着性が良好な同じ材料の塩化ビニル樹脂で成形することにより、補強体の内外面と内管及び外管との接着強度を高めると共に、これら補強体及び外管を透明にして、補強体の内部に金属箔帯に埋設することにより、該金属箔帯の金属色が外部から透視できるようにしている(例えば、特許文献1参照。)。
【0003】
【特許文献1】
実公平4−19274号公報(第2頁、第3図)
【0004】
【発明が解決しようとする課題】
しかし乍ら、このような従来の可撓性補強ホースでは、内管、補強体及び外管の成形材料が全て塩化ビニル樹脂であるため、該ホースが特に湯などの水分に触れると、塩化ビニル樹脂に添加された可塑剤により水の分子が外管の塩化ビニル樹脂中に入り込んで白く濁り、ホース全体の透明性を失って商品価値が著しく低下するという問題がある。
更に、内管及び外管は補強体を介して接着しているだけなので、補強体と接着していない内外管の部分は屈曲使用により亀裂を生じる恐れがあるという問題がある。
また、上記塩化ビニル樹脂は可塑剤の添加により軟化させ適宜の硬度及び弾性を有するように設定できるため、柔軟性を必要とするホースとしては良好な材料であるが、塩化ビニルは燃やすとダイオキシンを発生し易いので、環境保護の点から使用を避けることが望まれている。
また更に、螺旋状に巻き付けた補強体の間には、螺旋状の中空部が区画形成されるため、ホースの切断面から水などの流体が螺旋状の中空部を通って浸入し易く、この流体が外部から透明な外管を通って透視可能となって、商品価値が著しく低下するばかりでなく、内管、補強体及び外管が剥離し易くな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、透明性・耐久性・品質を向上させながら脱塩化ビニルを図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、補強体間の中空部に水が進入するのを防止してホースの失透や剥離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1または2に記載の発明の目的に加えて、インサート成形時におけるホース変形やホース抜けを防止しながら成形後におけるホース接続端部の位置を簡単に確認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、内管1、補強体2及び外管3を同じ材料で成形し、この成形材料がポリウレタン樹脂か又はウレタン系エラストマである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、前記内管1、補強体2及び外管3の成形材料と同じ成形材料からなる接続用の筒状キャップ4を、ホースの接続端部H1にホースの切断面H2が被覆されるように一体成形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1または2記載の発明の構成に、前記ホースの接続端部H1を金型A,B内に装填し、この金型A,Bの内面にホース接続端部H1へ向けて押圧部5aを突設させ、この押圧部5aでホース接続端部H1を移動不能に支持しながら溶融樹脂Rを注入して、該ホースHの切断面H2が被覆されるように筒状キャップ4をインサート成形し、このインサート成形後には、筒状キャップ4から押圧部5aを抜いて該筒状キャップ4に透視孔4aを開設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、内管1、補強体2及び外管3の全てをポリウレタン樹脂か又はウレタン系エラストマで成形することにより、これら内管1、補強体2及び外管3の接着強度が高く、吸水性がないから外管3や補強体2の内部に水分が入り込んで失透する恐れがないと共に、補強体2と接着していない内管1及び外管3の部分を屈曲使用しても亀裂を生じる恐れがなく、しかも耐熱性及び耐磨耗性が要求されるシャワーホースに最適なものである。
請求項2の発明は、請求項1記載の発明の作用に加えて、内管1、補強体2及び外管3の成形材料と同じ成形材料からなる接続用の筒状キャップ4を、ホース接続端部H1にホース切断面H2が被覆されるように一体成形することにより、接続用の筒状キャップ4とホース接続端部H1との接着強度が高くて、これらの接着部分及びホース切断面H2から流体が浸入しない。
請求項3の発明は、請求項1または2記載の発明の作用に加えて、金型A,B内にホース接続端部H1を押圧部5aで移動不能に支持しながら溶融樹脂Rを注入することにより、溶融樹脂Rが高い圧力で注入されてもホース接続端部H1を固定したまま硬化され、更にインサート成形された筒状キャップ4から押圧部5aを抜いて透視孔4aが開設されることにより、この透視孔4aを通じて筒状キャップ4内のホース接続端部H1が目視可能となる。
【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3に示す如く、可撓性補強ホースHが、内管1の外側に所定ピッチの補強体2を螺旋状に巻着し、この補強体2の外側に外管3を外表面が平坦となるように被着したクリフレックスタイプのフォーランホースであり、これをシャワーヘッドなどの吐水器具Sと給水栓や湯水混合栓など給水金具Vとを連絡するシャワーホースとして使用した場合を示すものである。
【0009】
上記可撓性補強ホースHは、先ず不透明又は透明の軟質合成樹脂からなる内管1を押し出し成形し、その外側に不透明又は透明の軟質合成樹脂で断面矩形に成形された補強体2を所定ピッチで螺旋状に巻き付け、更にその外側に透明な硬質合成樹脂からなる外管3を押し出し成形して一体的に接着させたものであり、これら内管1、補強体2及び外管3を全て同じ合成樹脂で成形する。
その具体例としては、可塑剤を含まず且つ物理強度と耐熱性と機械強度に優れたポリウレタン樹脂か又はウレタン系エラストマなどを使用するが、特に加水分解の恐れがないエーテル系を用いることが好ましい。
更に必要に応じて図示例の如く、内管1の外周面には、軸方向へ延びる補強糸1aを周方向へ等間隔毎に複数本固着しても良い。
【0010】
そして、前記可撓性補強ホースHの接続端部H1には、上記内管1、補強体2及び外管3の成形材料と同じ成形材料からなる接続用の筒状キャップ4を一体成形する。
【0011】
本実施例の場合には、図2(a)(b)に示す如く、ホースH接続端部H1の内側にインサートコアピンCを嵌入した状態で、対向して分離可能に支持された一対の金型A,B内に装填し、そこに溶融樹脂Rを高圧で注入することにより、内管1から外管3に至るホース切断面H2と外管3の外周面とに沿って筒状キャップ4がインサート成形される。
この際、ホース接続端部H1の補強体2及び外管3を取り除いて内管1を露出させると共に、この内管1を後述する押圧部5aで移動不能に押圧しながら溶融樹脂Rを注入することが好ましい。
【0012】
図示例の場合には上記金型A,Bに、異なる形状のキャビティA1,A2,B1,B2を夫々2個ずつ対向して凹設し、これらに可撓性補強ホースHの反対側に位置する両端の接続端部H1,H1を夫々装填させてインサート成形することにより、二つの筒状キャップ4,4が同時に一体成形される。
【0013】
上記金型A,Bの内面には、ホース接続端部H1へ向けて押圧部5a,5aを突設する。
本実施例には、金型A,Bに各ホース接続端部H1へ向けて貫通孔6.6を開設し、これら貫通孔6,6の内部に、異種ホースHの厚さに対応して突出長さが異なる押圧ピン5,5を交換自在に挿入すると共に移動不能に支持することにより、該押圧ピン5,5の先端に形成された押圧部5a,5aを、該金型A,B内へ突出させている。
【0014】
また、インサート成形時には、金型A,B内に突出した押圧部5a,5aで、該金型A,B内に装填されたホース接続端部H1を移動不能に押圧しながら溶融樹脂Rを注入して筒状キャップ4を形成し、インサート成形後には、この筒状キャップ4から押圧部5a,5aを抜いて、該筒状キャップ4に透視孔4aを開設する。
【0015】
図示例の場合には、図2(a)(b)に示す如く、金型A,Bの外側からインサートコアピンCへ向けて貫通孔6が、キャビティA1,A2,B1,B2の対向する位置に4本開穿され、これら貫通孔6…内に押圧ピン5…を夫々インサートコアピンCへ向けて移動不能に支持している。
【0016】
更に上記金型A,Bには、その中へ溶融樹脂Rを注入するためのゲートGが、前記筒状キャップ1の根元側に配置され、このゲートGから溶融樹脂Rをホース接続端部H1の先端側へ向けて注入させる。
【0017】
図示例の場合にはゲートGが、可動側又は固定側の金型A,Bのどちらか一方、例えば図3に示す如く、一方の金型Bに凹設したキャビティB1,B2の周壁のみに、上記押圧ピン5a,5aの挿通方向と交差して対向する位置に夫々一対ずつ配置されている。
【0018】
次に、斯かる可撓性補強ホースHの作用について説明する。
この可撓性補強ホースHは、内管1、補強体2及び外管3の全てを、塩化ビニル樹脂に比べ可塑剤が含まれないポリウレタン樹脂か又はウレタン系エラストマで成形しているので、これら内管1、補強体2及び外管3の接着強度が高く、吸水性がないから外管3や補強体2の内部に水分が入り込んで失透する恐れがない。
更に、塩化ビニル樹脂に比べて物理強度が高いポリウレタン樹脂か又はウレタン系エラストマ製なので、補強体2と接着していない内管1及び外管3の部分を屈曲使用しても亀裂を生じ難く耐久性が向上し、こに加えて、ポリウレタン樹脂か又はウレタン系エラストマは塩化ビニルに比べて耐熱性が高いから、温水を通すシャワーホースとして最適である。
また、ポリウレタン樹脂か又はウレタン系エラストマの機械強度、即ち引張り強度、伸び、弾性、耐摩耗性はいずれも塩化ビニル樹脂に比べて高く、シャワーヘッドをハンガーに懸ける時にホースがハンガーに擦れ易くて耐磨耗性が要求されるシャワーホースに最適である。
その結果、透明性・耐久性・品質を向上させながら脱塩化ビニルを図ることできる。
【0019】
更に本実施例の場合には、上記内管1、補強体2及び外管3の成形材料と同じ成形材料からなる接続用の筒状キャップ4を、ホース接続端部H1にホース切断面H2が被覆されるように一体成形することにより、接続用の筒状キャップ4とホース接続端部H1との接着強度が高くて、これらの接着部分及びホース切断面H2から流体が浸入しない。
その結果、補強体2間の中空部に水が進入するのを防止してホースの失透や剥離を防止できる。
【0020】
そして、上記筒状キャップ4の成形方法を手順に従って説明する。
先ず、図2(a)(b)及び図3に示す如く、ホース接続端部H1内にインサートコアピンCの先端部を、その外周面に表示された位置決め線C1まで挿入し、インサートコアピンCの基端部C2を、分離したどちらか一方の金型A,Bに対して移動不能にセットし、これら金型A,Bを接近移動させることにより、その所定位置にホース接続端部H1が装填される。
【0021】
図示例の場合には、金型A,Bに凹設された一組のキャビティA1,A2,B1,B2に、可撓性補強ホースHの両端に位置する接続端部H1,H1を同時に装填している。
【0022】
この状態で、金型A,BのキャビティA1,A2,B1,B2内に突出した押圧部5a,5aで、インサートコアピンC,Cとの間にホース接続端部H1,H1を移動不能に押圧し、ゲートG…からキャビティA1,A2,B1,B2内へ溶融樹脂Rを注入する。
【0023】
それにより、溶融樹脂Rが高い圧力で注入されてもホース接続端部H1,H1は移動せずに固定されたまま溶融樹脂Rが硬化し、筒状キャップ4,4がインサート成形される。
その結果、インサート成形時におけるホース変形やホース抜けを防止できる。
【0024】
更に本実施例の場合には、上記ゲートG…が筒状キャップ4の根元側に配置され、このゲートG…から溶融樹脂Rがホース接続端部H1,H1の先端側へ向けて注入される。
それにより、ホース接続端部H1,H1がめくれ難くなると共に逆方向のホース押し戻しが軽減される。
その結果、ホース変形防止機能及びホース抜け防止機能を更に向上できる。
【0025】
またインサート成形後、本実施例の場合には金型A,Bを分離移動すれば、これと連動して、一体成形された筒状キャップ4,4から押圧部5a…が抜け、該筒状キャップ4,4に透視孔4a…が開設される。
それにより、この透視孔4a…を通じて筒状キャップ4,4内のホース接続端部H1,H1が目視可能となる。
その結果、インサート成形後におけるホース接続端部H1の位置を簡単に確認できる。
【0026】
このように一体成形された筒状キャップ4,4は、金型A,Bを分離移動してからインサートコアピンCを引き抜くことにより成形工程が完了する。
また、各筒状キャップ4の外形状は、可撓性補強ホースHを接続する器具に合わせて設計される。
【0027】
その具体例としては、例えば図1に示す如く、異なる形状の筒状キャップ4,4の外周に袋ナットN1,N2を嵌挿して螺着させることにより、例えばシャワーヘッドなどの吐水器具Sに接続するための継手構造と、給水栓や湯水混合栓など給水金具Eに接続するための継手構造となる場合を示している。
【0028】
一方、図4及び図5に示すものと、図6に示すものと、図7に示すものは、夫々が本発明の他の実施例である。
【0029】
図4及び図5に示すものは、前記ホース接続端部H1の内周面に沿ってインサートパイプPを挿入した状態で金型A,B内に装填した構成が、前記図1〜図3に示した実施例とは異なり、それ以外の構成は図1〜図3に示した実施例と同じものである。
【0030】
上記インサートパイプPは、一体成形する筒状キャップ4の軸方向寸法と略同じか又はそれより長く形成して、筒状キャップ4を一体成形する位置に配置するか、或いはその軸方向前後へ夫々突出させることが好ましい。
更にインサートパイプPの外周面には、ホース接続端部H1の位置決め線C1が表示されると共に、必要に応じて、インサート成形後に筒状キャップ1からインサートパイプPが抜け難くするために凹部などの抜け止め手段P1を設ける方が好ましい。
【0031】
従って、図4及び図5に示すものは、インサートパイプPを挟んでホース接続端部H1の外側に筒状キャップ4がインサート成形される。
それにより、可撓性補強ホースHを屈曲してもホース接続端部H1がインサートパイプPで保形固定されて変形しない。
【0032】
図6に示すものは、前記補強体2と外管3のと間に、例えばアルミ箔などの金属箔帯7aを一体的に挟み込んで、該金属箔帯7aの金属色が透明な外管3を通して外部から透視できるようにした構成が、前記図1〜図3又は図4及び図5に示した実施例とは異なり、それ以外の構成は図1〜図3又は図4及び図5に示した実施例と同じものである。
【0033】
図7に示すものは、前記補強体2の内部に例えばアルミ箔などの金属箔帯7bを埋設して、該金属箔帯7bの金属色が透明な補強体2及び外管3を通して外部から透視できるようにした構成が、前記図1〜図3又は図4及び図5に示した実施例とは異なり、それ以外の構成は図1〜図3又は図4及び図5に示した実施例と同じものである。
【0034】
従って、図6と図7に示すものは、上述した図1〜図3又は図4及び図5に示した実施例と同様な作用効果が得られると共に、美観的に優れるというという利点がある。
【0035】
尚、前示実施例では、可撓性補強ホースHがクリフレックスタイプのフォーランホースである場合を示したが、これに限定されず、不透明な内管1と透明な外管3との間に補強体3として、金属色に光る断面矩形体と、断面円形の補強線材を交互に位置するように螺旋状に巻き付けて一体化したり、特公平4−19276号公報に示されるようなアリフレックスタイプのフォーランホースであっても良い。
【0036】
更に、金型A,Bに開設された貫通孔6の内部に押圧ピン5を挿入して移動不能に支持することにより、該押圧ピン5の先端に形成された押圧部5aを突出させたが、これに限定されず、図示せぬが例えば貫通孔6を開設することなく金型A,Bの内面に押圧部5aを一体成形するか又は別個に成形した押圧部5aを固着しても良い。
また、金型A,Bに凹設された一組のキャビティA1,A2,B1,B2に、両端に位置するホース接続端部H1,H1を同時に装填することにより、二つの筒状キャップ4,4が同時に一体成形される場合を示したが、これに限定されず、片側のホース接続端部H1のみを装填して一つの筒状キャップ4のみを一体成形しても良い。
【0037】
【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、内管1、補強体2及び外管3の全てをポリウレタン樹脂か又はウレタン系エラストマで成形することにより、これら内管1、補強体2及び外管3の接着強度が高く、吸水性がないから外管3や補強体2の内部に水分が入り込んで失透する恐れがないと共に、補強体2と接着していない内管1及び外管3の部分を屈曲使用しても亀裂を生じる恐れがなく、しかも耐熱性及び耐磨耗性が要求されるシャワーホースに最適であるので、透明性・耐久性・品質を向上させながら脱塩化ビニルを図ることできる。
従って、内管、補強体及び外管の成形材料が全て塩化ビニル樹脂である従来のものに比べ、商品価値を高く維持できると共に、ダイオキシンの発生を予防して環境問題を解消でき、しかもリサイクルも容易である。
【0038】
請求項2の発明は、請求項1の発明の効果に加えて、内管1、補強体2及び外管3の成形材料と同じ成形材料からなる接続用の筒状キャップ4を、ホース接続端部H1にホース切断面H2が被覆されるように一体成形することにより、接続用の筒状キャップ4とホース接続端部H1との接着強度が高くて、これらの接着部分及びホース切断面H2から流体が浸入しないので、補強体2間の中空部に水が進入するのを防止してホースの失透や剥離を防止できる。
【0039】
請求項3の発明は、請求項1または2の発明の効果に加えて、金型A,B内にホース接続端部H1を押圧部5aで移動不能に支持しながら溶融樹脂Rを注入することにより、溶融樹脂Rが高い圧力で注入されてもホース接続端部H1を固定したまま硬化され、更にインサート成形された筒状キャップ4から押圧部5aを抜いて透視孔4aが開設されることにより、この透視孔4aを通じて筒状キャップ4内のホース接続端部H1が目視可能となるので、インサート成形時におけるホース変形やホース抜けを防止しながら成形後におけるホース接続端部の位置を簡単に確認できる。
従って、ホース抜けや漏れなどの確実に防止できる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す可撓性補強ホースの一部切欠正面図である。
【図2】(a)(b)は成形時の縦断側面図である。
【図3】同横断平面図である。
【図4】本発明の他の実施例を示す可撓性補強ホースの一部切欠正面図である。
【図5】(a)(b)は成形時の縦断側面図である。
【図6】本発明の他の実施例を示す可撓性補強ホースの部分的な拡大縦断正面図である。
【図7】本発明の他の実施例を示す可撓性補強ホースの部分的な拡大縦断正面図である。
【符号の説明】
1 内管 2 補強体
3 外管 4 筒状キャップ
4a 透視孔 5a 押圧部
A,B 金型 H 可撓性補強ホース
H1 ホースの接続端部 H2 ホースの切断面
R 溶融樹脂
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flexible reinforced hose which is used, for example, as a shower hose in a hot and humid place such as a bathroom, and has at least a transparent outer surface.
Specifically, a rigid or semi-rigid synthetic resin reinforcement is spirally wound around the outside of the soft synthetic resin inner tube, and a transparent soft synthetic resin outer tube is attached to the outside of the reinforcement. Flexible reinforced hose.
[0002]
[Prior art]
Conventionally, as a flexible reinforcing hose of this kind, an inner pipe and an outer pipe are formed of a vinyl chloride resin, and a reinforcing body spirally arranged at a predetermined pitch between the inner pipe and the outer pipe is formed with the inner pipe and the outer pipe. By molding with a vinyl chloride resin of the same material having good adhesiveness, the adhesive strength between the inner and outer surfaces of the reinforcing member and the inner tube and the outer tube is increased, and the reinforcing member and the outer tube are made transparent, and the reinforcing member is formed. The metal color of the metal foil band can be seen from the outside by being embedded in the metal foil band inside (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 4-19274 (page 2, FIG. 3)
[0004]
[Problems to be solved by the invention]
However, in such a conventional flexible reinforced hose, since the molding materials of the inner tube, the reinforcing member and the outer tube are all made of vinyl chloride resin, when the hose is exposed to water such as hot water, vinyl chloride is particularly hard. Due to the plasticizer added to the resin, water molecules enter the vinyl chloride resin of the outer tube and become cloudy white, causing a problem that the transparency of the entire hose is lost and the commercial value is significantly reduced.
Furthermore, since the inner tube and the outer tube are only bonded via the reinforcing member, there is a problem that a portion of the inner and outer tubes not bonded to the reinforcing member may be cracked by bending.
Also, since the above-mentioned vinyl chloride resin can be softened by adding a plasticizer and set to have appropriate hardness and elasticity, it is a good material for a hose requiring flexibility, but vinyl chloride can reduce dioxin when burned. Since it easily occurs, it is desired to avoid using it from the viewpoint of environmental protection.
Furthermore, since a spiral hollow portion is formed between the spirally wound reinforcements, a fluid such as water easily penetrates from the cut surface of the hose through the spiral hollow portion. The fluid can be seen through from the outside through the transparent outer tube, so that not only the commercial value is significantly reduced, but also the inner tube, the reinforcing member, and the outer tube are easily peeled off.
[0005]
An object of the present invention is to achieve dechlorination while improving transparency, durability and quality.
The invention of claim 2 has the object of preventing the devitrification and peeling of the hose by preventing water from entering the hollow portion between the reinforcing members, in addition to the object of the invention described in claim 1. It was done.
According to the third aspect of the present invention, in addition to the object of the first or second aspect of the present invention, the position of the hose connection end portion after the molding is easily confirmed while preventing the hose from being deformed or coming off during insert molding. It is intended for that purpose.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, according to the first aspect of the present invention, the inner tube 1, the reinforcing member 2, and the outer tube 3 are molded from the same material, and the molding material is a polyurethane resin or a urethane-based elastomer. It is characterized by being.
According to a second aspect of the present invention, in addition to the configuration of the first aspect, a connecting cylindrical cap 4 made of the same molding material as the molding material of the inner pipe 1, the reinforcing member 2, and the outer pipe 3 is provided. The connection end portion H1 is characterized in that it is integrally formed so as to cover the cut surface H2 of the hose.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the connection end portion H1 of the hose is loaded into the dies A and B, and the hose connection end is provided on the inner surface of the dies A and B. A pressing portion 5a protrudes toward the portion H1, and the molten resin R is injected while the hose connecting end portion H1 is immovably supported by the pressing portion 5a so that the cut surface H2 of the hose H is covered. After the insert molding, a pressing portion 5a is removed from the cylindrical cap 4 and a transparent hole 4a is opened in the cylindrical cap 4.
[0007]
[Action]
According to the first aspect of the present invention, the inner tube 1, the reinforcing member 2, and the outer tube 3 are all formed of a polyurethane resin or a urethane-based elastomer so that the adhesive strength of the inner tube 1, the reinforcing member 2, and the outer tube 3 is improved. Since it is high and has no water absorption, there is no danger of devitrification due to water entering into the outer tube 3 or the reinforcing member 2 and the inner tube 1 and the outer tube 3 not bonded to the reinforcing member 2 are bent and used. However, it is most suitable for a shower hose that does not cause cracks and requires heat resistance and abrasion resistance.
According to a second aspect of the present invention, in addition to the operation of the first aspect, a connecting cylindrical cap 4 made of the same molding material as the inner tube 1, the reinforcing member 2 and the outer tube 3 is connected to a hose. Since the end H1 is integrally formed so as to cover the hose cut surface H2, the bonding strength between the connecting tubular cap 4 and the hose connection end H1 is high, and these bonded portions and the hose cut surface H2 are formed. No fluid enters from
According to a third aspect of the present invention, in addition to the operation of the first or second aspect, the molten resin R is injected into the molds A and B while the hose connecting end H1 is immovably supported by the pressing portion 5a. Accordingly, even when the molten resin R is injected at a high pressure, the hose is cured while the hose connection end H1 is fixed, and the pressing portion 5a is removed from the insert-molded cylindrical cap 4 to open the see-through hole 4a. Thereby, the hose connection end portion H1 in the cylindrical cap 4 can be viewed through the transparent hole 4a.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIGS. 1 to 3, a flexible reinforcing hose H spirally winds a reinforcing body 2 having a predetermined pitch around the outside of an inner tube 1, and externally surrounds the outside of the reinforcing body 2. This is a cliff-flex type forerunner hose having a pipe 3 attached so that its outer surface is flat, and is a shower hose for connecting a water discharger S such as a shower head and a water supply fitting V such as a water tap or a hot water mixer tap. It shows the case when used as.
[0009]
The flexible reinforcing hose H is formed by first extruding an inner tube 1 made of an opaque or transparent soft synthetic resin and forming a reinforcing body 2 formed of an opaque or transparent soft synthetic resin into a rectangular cross section outside the inner tube 1 at a predetermined pitch. And the outer tube 3 made of a transparent hard synthetic resin is extruded and bonded integrally to the outside, and the inner tube 1, the reinforcing body 2 and the outer tube 3 are all the same. Mold with synthetic resin.
Specific examples thereof include a polyurethane resin or a urethane-based elastomer that does not contain a plasticizer and has excellent physical strength, heat resistance, and mechanical strength, and it is particularly preferable to use an ether-based resin that does not have a risk of hydrolysis. .
Further, if necessary, a plurality of reinforcing threads 1a extending in the axial direction may be fixed to the outer peripheral surface of the inner tube 1 at equal intervals in the circumferential direction, as shown in the illustrated example.
[0010]
Then, a connecting cylindrical cap 4 made of the same molding material as the molding material of the inner pipe 1, the reinforcing body 2, and the outer pipe 3 is integrally formed with the connection end portion H1 of the flexible reinforcing hose H.
[0011]
In the case of the present embodiment, as shown in FIGS. 2A and 2B, a pair of oppositely separably supported gold pieces with the insert core pin C fitted inside the hose H connection end H1. By loading the molten resin R into the molds A and B and injecting the molten resin R at a high pressure, the cylindrical cap 4 is formed along the cut surface H2 of the hose from the inner tube 1 to the outer tube 3 and the outer peripheral surface of the outer tube 3. Is insert molded.
At this time, the reinforcement 2 and the outer tube 3 at the hose connection end H1 are removed to expose the inner tube 1, and the molten resin R is injected while the inner tube 1 is immovably pressed by a pressing portion 5a described later. Is preferred.
[0012]
In the case of the illustrated example, two cavities A1, A2, B1, and B2 having different shapes are respectively formed in the molds A and B so as to face each other, and the cavities A1, A2, B1, and B2 are positioned opposite to the flexible reinforcing hose H. The two cylindrical caps 4 and 4 are simultaneously and integrally formed by loading the connection end portions H1 and H1 at both ends to perform the insert molding.
[0013]
On the inner surfaces of the dies A and B, pressing portions 5a and 5a are protruded toward the hose connection end H1.
In this embodiment, through-holes 6.6 are opened in the dies A and B toward the respective hose connection ends H1. By pressing the pressing pins 5 and 5 having different protruding lengths in a replaceable manner and supporting the pressing pins 5 and 5 immovably, the pressing portions 5 a and 5 a formed at the tips of the pressing pins 5 and 5 are connected to the molds A and B. It protrudes inward.
[0014]
Further, at the time of insert molding, the molten resin R is injected while pressing the hose connection end H1 loaded in the dies A and B immovably by the pressing portions 5a and 5a projecting into the dies A and B. After the insert molding, the pressing portions 5a, 5a are removed from the cylindrical cap 4, and a transparent hole 4a is opened in the cylindrical cap 4.
[0015]
In the case of the illustrated example, as shown in FIGS. 2 (a) and 2 (b), the through holes 6 are formed at positions facing the cavities A1, A2, B1, and B2 from the outside of the molds A and B toward the insert core pins C. In each of the through holes 6, the press pins 5 are supported immovably toward the insert core pins C.
[0016]
Further, a gate G for injecting the molten resin R into the molds A and B is disposed on the base side of the cylindrical cap 1, and the molten resin R is supplied from the gate G to the hose connection end H1. Into the tip of the pan.
[0017]
In the case of the illustrated example, the gate G is provided only on one of the molds A and B on the movable side or the fixed side, for example, only on the peripheral wall of the cavities B1 and B2 recessed in one mold B as shown in FIG. The pair of pressing pins 5a, 5a are disposed at positions facing each other so as to intersect with the insertion direction of the pressing pins 5a, 5a.
[0018]
Next, the operation of the flexible reinforcing hose H will be described.
In this flexible reinforced hose H, all of the inner pipe 1, the reinforcing body 2 and the outer pipe 3 are formed of a polyurethane resin which does not contain a plasticizer as compared with a vinyl chloride resin or a urethane-based elastomer. Since the adhesive strength of the inner tube 1, the reinforcing member 2 and the outer tube 3 is high and there is no water absorption, there is no danger of moisture entering the outer tube 3 and the reinforcing member 2 and devitrification.
Furthermore, since it is made of a polyurethane resin or a urethane-based elastomer having a higher physical strength than that of the vinyl chloride resin, the inner tube 1 and the outer tube 3 which are not bonded to the reinforcing member 2 are hardly cracked even when used in a bent state, so that they are durable. In addition, since polyurethane resin or urethane-based elastomer has higher heat resistance than vinyl chloride, it is most suitable as a shower hose for passing hot water.
In addition, the mechanical strength of polyurethane resin or urethane-based elastomer, that is, tensile strength, elongation, elasticity, and abrasion resistance are all higher than that of vinyl chloride resin, and when the shower head is hung on the hanger, the hose is easily rubbed on the hanger. Ideal for shower hoses that require abrasion.
As a result, devinyl chloride can be achieved while improving transparency, durability, and quality.
[0019]
Further, in the case of the present embodiment, a cylindrical cap 4 for connection made of the same molding material as the molding material of the inner pipe 1, the reinforcing body 2 and the outer pipe 3 is provided with a hose cut end H1 at a hose connection end H1. By being integrally molded so as to be covered, the bonding strength between the connecting tubular cap 4 and the hose connection end portion H1 is high, and fluid does not intrude from these bonded portions and the hose cut surface H2.
As a result, it is possible to prevent water from entering the hollow portion between the reinforcing members 2 and to prevent devitrification and peeling of the hose.
[0020]
Then, a method of forming the cylindrical cap 4 will be described according to a procedure.
First, as shown in FIGS. 2A and 2B and FIG. 3, the tip of the insert core pin C is inserted into the hose connection end H1 up to the positioning line C1 displayed on the outer peripheral surface thereof, and the insert core pin C is inserted. The base end C2 is set immovable with respect to one of the separated molds A and B, and the molds A and B are moved closer to each other, so that the hose connection end H1 is loaded at a predetermined position. Is done.
[0021]
In the case of the illustrated example, the connection ends H1 and H1 located at both ends of the flexible reinforcing hose H are simultaneously loaded into a set of cavities A1, A2, B1 and B2 recessed in the molds A and B. are doing.
[0022]
In this state, the hose connection ends H1, H1 are immovably pressed between the insert core pins C, C by the pressing portions 5a, 5a protruding into the cavities A1, A2, B1, B2 of the dies A, B. Then, the molten resin R is injected from the gates G into the cavities A1, A2, B1, and B2.
[0023]
As a result, even when the molten resin R is injected at a high pressure, the molten resin R is hardened while the hose connection ends H1 and H1 remain fixed without moving, and the cylindrical caps 4 and 4 are insert-molded.
As a result, it is possible to prevent hose deformation and hose detachment during insert molding.
[0024]
Further, in the case of the present embodiment, the gates G are arranged on the base side of the cylindrical cap 4, and the molten resin R is injected from the gates G toward the distal ends of the hose connection ends H1 and H1. .
As a result, the hose connection ends H1 and H1 are hardly turned up, and the hose is pushed back in the opposite direction.
As a result, the hose deformation preventing function and the hose detaching preventing function can be further improved.
[0025]
Further, in the case of this embodiment, if the dies A and B are separated and moved after the insert molding, the pressing portions 5a... Through holes 4a are opened in the caps 4, 4.
As a result, the hose connection ends H1, H1 in the cylindrical caps 4, 4 can be viewed through the transparent holes 4a.
As a result, the position of the hose connection end H1 after the insert molding can be easily confirmed.
[0026]
The molding process of the cylindrical caps 4, 4 integrally molded in this manner is completed by separating the molds A, B and then pulling out the insert core pin C.
Further, the outer shape of each cylindrical cap 4 is designed according to an instrument for connecting the flexible reinforcing hose H.
[0027]
As a specific example, as shown in FIG. 1, for example, cap nuts N1 and N2 are inserted and screwed around the outer circumferences of cylindrical caps 4 and 4 of different shapes, thereby connecting to caps N such as a shower head. And a joint structure for connecting to a water supply fitting E such as a water tap or a hot and cold water mixing tap.
[0028]
On the other hand, those shown in FIGS. 4 and 5, FIG. 6, and FIG. 7 are each another embodiment of the present invention.
[0029]
FIGS. 4 and 5 show a configuration in which the insert pipe P is inserted along the inner peripheral surface of the hose connection end H1 and loaded into the molds A and B, as shown in FIGS. Unlike the embodiment shown, the other configuration is the same as the embodiment shown in FIGS.
[0030]
The insert pipe P is formed to be substantially the same as or longer than the axial dimension of the cylindrical cap 4 to be integrally formed, and is disposed at a position where the cylindrical cap 4 is to be integrally formed, or to the front and rear thereof in the axial direction. It is preferable to make them protrude.
Further, on the outer peripheral surface of the insert pipe P, a positioning line C1 of the hose connection end H1 is displayed, and if necessary, a concave portion or the like is formed to make it difficult for the insert pipe P to come off from the cylindrical cap 1 after insert molding. It is preferable to provide the retaining means P1.
[0031]
4 and 5, the cylindrical cap 4 is insert-molded outside the hose connection end H1 with the insert pipe P interposed therebetween.
Thereby, even if the flexible reinforcing hose H is bent, the hose connection end H1 is fixed and fixed by the insert pipe P and does not deform.
[0032]
FIG. 6 shows an outer tube 3 in which a metal foil band 7a such as an aluminum foil is sandwiched between the reinforcing member 2 and the outer tube 3 so that the metal color of the metal foil band 7a is transparent. Is different from the embodiment shown in FIG. 1 to FIG. 3 or FIG. 4 and FIG. 5, and the other configuration is shown in FIG. 1 to FIG. 3 or FIG. 4 and FIG. This is the same as the embodiment described above.
[0033]
FIG. 7 shows an example in which a metal foil band 7b such as an aluminum foil is buried in the inside of the reinforcing body 2 and the metal color of the metal foil band 7b is transparently seen through the reinforcing body 2 and the outer tube 3 which are transparent. The configuration made possible is different from the embodiment shown in FIG. 1 to FIG. 3 or FIG. 4 and FIG. 5, and the other configuration is the same as that of the embodiment shown in FIG. Are the same.
[0034]
Therefore, the embodiment shown in FIGS. 6 and 7 has the advantages that the same operation and effects as those of the embodiment shown in FIGS. 1 to 3 or FIGS.
[0035]
In the above-described embodiment, the case where the flexible reinforcing hose H is a cliff-flex type forerunning hose is shown. However, the present invention is not limited to this, and the space between the opaque inner tube 1 and the transparent outer tube 3 is not limited to this. As the reinforcing member 3, a rectangular cross-section shining in a metallic color and a reinforcing wire having a circular cross-section are spirally wound so as to be alternately positioned and integrated, or Ariflex as disclosed in Japanese Patent Publication No. 4-19276. It may be a type of Forlan hose.
[0036]
Furthermore, the pressing portion 5a formed at the tip of the pressing pin 5 is projected by inserting the pressing pin 5 into the through hole 6 formed in the molds A and B and supporting the pressing pin 5 so as not to move. However, the present invention is not limited to this. Although not shown, for example, the pressing portion 5a may be integrally formed on the inner surfaces of the dies A and B without forming the through hole 6, or the pressing portion 5a formed separately may be fixed. .
Further, by simultaneously loading the hose connection ends H1 and H1 located at both ends into a set of cavities A1, A2, B1 and B2 recessed in the molds A and B, two cylindrical caps 4 and 4 are formed. Although the case where the four pieces 4 are integrally molded at the same time is shown, the invention is not limited to this, and only one hose connection end H1 may be loaded and only one cylindrical cap 4 may be integrally molded.
[0037]
【The invention's effect】
As described above, according to the first aspect of the present invention, all of the inner tube 1, the reinforcing body 2, and the outer tube 3 are formed of polyurethane resin or urethane-based elastomer, so that these inner tubes 1, Since the bonding strength between the reinforcing member 2 and the outer tube 3 is high and there is no water absorption, there is no danger of moisture entering the outer tube 3 or the reinforcing member 2 and devitrification, and the inner tube not bonded to the reinforcing member 2. Even if the outer tube 3 and the outer tube 3 are bent, there is no possibility of cracking, and it is most suitable for a shower hose that requires heat resistance and abrasion resistance, so that transparency, durability and quality can be improved. It is possible to achieve vinyl chloride removal.
Therefore, compared to the conventional material in which the molding material of the inner tube, the reinforcing member and the outer tube is all vinyl chloride resin, the commercial value can be maintained higher, the generation of dioxins can be prevented, and environmental problems can be solved. Easy.
[0038]
According to a second aspect of the present invention, in addition to the effect of the first aspect, a connecting cylindrical cap 4 made of the same molding material as the inner tube 1, the reinforcing member 2 and the outer tube 3 is connected to the hose connection end. By integrally molding the portion H1 so as to cover the hose cut surface H2, the bonding strength between the connecting tubular cap 4 and the hose connection end portion H1 is high, and the bonding portion and the hose cut surface H2 Since the fluid does not penetrate, it is possible to prevent water from entering the hollow portion between the reinforcing members 2 and to prevent devitrification and peeling of the hose.
[0039]
According to a third aspect of the present invention, in addition to the effects of the first or second aspect, the molten resin R is injected into the molds A and B while the hose connecting end H1 is immovably supported by the pressing portion 5a. Accordingly, even when the molten resin R is injected at a high pressure, the resin is cured while the hose connection end H1 is fixed, and further, the pressing portion 5a is removed from the insert-molded cylindrical cap 4 to open the see-through hole 4a. Since the hose connection end H1 in the cylindrical cap 4 can be visually recognized through the transparent hole 4a, the position of the hose connection end after molding can be easily confirmed while preventing deformation and detachment of the hose during insert molding. it can.
Therefore, it is possible to reliably prevent the hose from coming off or leaking.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a flexible reinforced hose showing one embodiment of the present invention.
FIGS. 2A and 2B are longitudinal side views at the time of molding.
FIG. 3 is a cross-sectional plan view of the same.
FIG. 4 is a partially cutaway front view of a flexible reinforced hose showing another embodiment of the present invention.
FIGS. 5A and 5B are longitudinal side views at the time of molding.
FIG. 6 is a partially enlarged longitudinal sectional front view of a flexible reinforced hose showing another embodiment of the present invention.
FIG. 7 is a partially enlarged longitudinal sectional front view of a flexible reinforced hose showing another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Reinforcement body 3 Outer pipe 4 Cylindrical cap 4a Transparent hole 5a Pressing part A, B Mold H Flexible reinforcing hose H1 Hose connection end H2 Hose cut surface R Molten resin

Claims (3)

軟質合成樹脂製の内管(1)の外側に、硬質又は半硬質合成樹脂製の補強体(2)を螺旋状に巻着し、この補強体(2)の外側に透明な軟質合成樹脂製の外管(3)を被着した可撓性補強ホースにおいて、
前記内管(1)、補強体(2)及び外管(3)を同じ材料で成形し、この成形材料がポリウレタン樹脂か又はウレタン系エラストマであることを特徴とする可撓性補強ホース。
A reinforcing member (2) made of a hard or semi-rigid synthetic resin is spirally wound around the outside of the inner tube (1) made of a soft synthetic resin, and a transparent soft synthetic resin is formed outside the reinforcing member (2). A flexible reinforced hose having an outer tube (3) attached thereto,
A flexible reinforced hose, wherein the inner pipe (1), the reinforcing body (2) and the outer pipe (3) are formed of the same material, and the formed material is a polyurethane resin or a urethane-based elastomer.
前記内管(1)、補強体(2)及び外管(3)の成形材料と同じ成形材料からなる接続用の筒状キャップ(4)を、ホースの接続端部(H1)にホースの切断面(H2)が被覆されるように一体成形した請求項1記載の可撓性補強ホース。A connecting cylindrical cap (4) made of the same molding material as that of the inner pipe (1), the reinforcing body (2) and the outer pipe (3) is cut into the hose at the connection end (H1). 2. The flexible reinforced hose according to claim 1, wherein the flexible reinforced hose is integrally formed so as to cover the surface (H2). 前記ホースの接続端部(H1)を金型(A,B)内に装填し、この金型(A,B)の内面にホース接続端部(H1)へ向けて押圧部(5a)を突設させ、この押圧部(5a)でホース接続端部(H1)を移動不能に支持しながら溶融樹脂(R)を注入して、該ホース(H)の切断面(H2)が被覆されるように筒状キャップ(4)をインサート成形し、このインサート成形後には、筒状キャップ(4)から押圧部(5a)を抜いて該筒状キャップ(4)に透視孔(4a)を開設した請求項1または2記載の可撓性補強ホースThe connection end (H1) of the hose is loaded into a mold (A, B), and a pressing portion (5a) protrudes toward the hose connection end (H1) on the inner surface of the mold (A, B). The molten resin (R) is injected while the hose connection end (H1) is immovably supported by the pressing portion (5a) so that the cut surface (H2) of the hose (H) is covered. A cylindrical cap (4) is formed by insert molding, and after this insert molding, the pressing portion (5a) is removed from the cylindrical cap (4) to open a transparent hole (4a) in the cylindrical cap (4). Item 3. The flexible reinforced hose according to Item 1 or 2
JP2003012379A 2003-01-21 2003-01-21 Reinforced flexible hose Pending JP2004225763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003012379A JP2004225763A (en) 2003-01-21 2003-01-21 Reinforced flexible hose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003012379A JP2004225763A (en) 2003-01-21 2003-01-21 Reinforced flexible hose

Publications (1)

Publication Number Publication Date
JP2004225763A true JP2004225763A (en) 2004-08-12

Family

ID=32901005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003012379A Pending JP2004225763A (en) 2003-01-21 2003-01-21 Reinforced flexible hose

Country Status (1)

Country Link
JP (1) JP2004225763A (en)

Similar Documents

Publication Publication Date Title
US6767209B1 (en) Interdental brush and production method therefor
JP5107909B2 (en) Male extracorporeal catheter and method of making the catheter
WO2012008535A1 (en) Shower head and manufacturing method for same
JP2006522623A (en) Laryngeal mask and manufacturing method thereof
GB2062733A (en) Sealing strip
WO2001031245A1 (en) Corrugated resin tube
CN113827169B (en) Snake bone unit, snake bone assembly, insertion part, endoscope and connecting method
US20230390602A1 (en) Tongue strengthening device
JP2004225763A (en) Reinforced flexible hose
JP5670158B2 (en) Pipe fitting device
PT95460A (en) WELDING SLEEVE AND ITS MANUFACTURING PROCESS
JP2691314B2 (en) Partially reinforced rubber hose
KR20110015752A (en) A plastic pipe forming machine
JP5451343B2 (en) Writing instrument grip and writing instrument with this grip
JP3865285B2 (en) fishing rod
JP2002051835A (en) Toothbrush
JP2008256042A (en) Flexible reinforced hose
KR101057634B1 (en) Corrugated PVC tube forming a composite cross-section
CN215777931U (en) Snake bone unit, snake bone assembly, insertion part and endoscope
JP2006307453A (en) Handrail joint and joint structure of handrail
JPS58130025A (en) Curved tube for endoscope
JP3640305B2 (en) Hose connection structure and manufacturing method thereof
JP4456085B2 (en) Method for forming bellows duct
JP2000053000A (en) Steering wheel coated with leather and shift knob
CN213937306U (en) Automobile wire harness rubber plastic sleeve with tensile structure