JP3584245B2 - Heating device for resin tube seal - Google Patents

Heating device for resin tube seal Download PDF

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Publication number
JP3584245B2
JP3584245B2 JP2002129226A JP2002129226A JP3584245B2 JP 3584245 B2 JP3584245 B2 JP 3584245B2 JP 2002129226 A JP2002129226 A JP 2002129226A JP 2002129226 A JP2002129226 A JP 2002129226A JP 3584245 B2 JP3584245 B2 JP 3584245B2
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Japan
Prior art keywords
hot air
exhaust
resin tube
tube
nozzle
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JP2002129226A
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JP2003321002A (en
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利忠 酒井
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ワイエル工業株式会社
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43123—Closing the ends of squeeze tubes, e.g. for toothpaste or cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、樹脂性チューブのシール部加熱装置に関するものであり、化粧品や接着材等の充填物を充填するための樹脂性チューブをクランプシールすべく、該樹脂性チューブのシール部となる端部に熱風を噴出して加熱し、軟化溶融させる樹脂性チューブのシール部加熱装置に於て、特に、熱風の排気量を調節することによって、前記樹脂性チューブのクランプシール部となる端部外周部近傍に於ける外気の吸収、又は、前記熱風の外部への漏出を規制し、シール部の良好な加熱を行うための樹脂性チューブのシール部加熱装置に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
従来の此種樹脂性チューブについて図８乃至図１３に従って説明する。図８に於て、１は化粧品或いは接着材等の充填物が充填された完成品としての樹脂性チューブであり、該樹脂性チューブ１は可撓性の合成樹脂で成形され、該樹脂性チューブ１のチューブ本体２一端部には注出口（図示せず）を備えた首部２ａと、該首部２ａと該チューブ本体２端部とを全周に及んで結合する肩部２ｂとが該チューブ本体２と一体に成形されており、該首部２ａにねじ付きキャップ３が着脱自在に設けられており、更に、該チューブ本体２内に充填物（図示せず）が充填され、前記チューブ本体２の他端部は熱融着によりクランプシールされている。
【０００３】
次に、前記樹脂性チューブ１の充填物充填方法及びクランプシールの方法を説明すると、先ず、図９に示す如く、前記樹脂性チューブ１にキャップ３を取付けて前記注出口を閉じると共に、該キャップ３側を下方にして該樹脂性チューブ１を上下逆方向に保持し、前記チューブ本体２の上端部２ｃを開口させ、充填物Ｆを充填するための充填ノズル４を該上端部２ｃ内に挿入し、該チューブ本体２内に充填物Ｆを充填する。
【０００４】
次に、図１０に示す如く、前記樹脂性チューブ１をシール部加熱装置５内に搬入し、該樹脂性チューブ１のクランプシール部となる上端部２ｃの開口内に、該シール部加熱装置５に設けられた熱風ノズル６先端部を所定長さ挿入させる。
ここで、該シール部加熱装置５について説明すると、該シール部加熱装置５に設けられた熱風ノズル６は先端部外周に熱風を放射方向に噴出する単純多孔ノズル式の複数の噴出孔６ａ，６ａ…が形成されており、該熱風ノズル６は熱源を備えた熱風発生器（図示せず）に接続されている。尚、前記単純多孔ノズル式の噴出孔６ａに代えて、単純隙間ノズル式（スリット式）噴出孔を用いるものも知られている。
【０００５】
又、前記熱風ノズル６は所定間隔を有して排気管７に囲繞されており、該排気管７は下流側（図に於て上部側）が排気を吸引するためのブロアー（図示せず）に接続され、該排気管７の下端部は前記熱風ノズル６の先端部よりもやや下方に延設され、該下端部には中央部に開口部７ａを備えた内向きフランジ７ｂが形成され、該開口部７ａは前記チューブ本体２の上端部２ｃの開口状態に於ける外径よりもやや大径に形成されている。
【０００６】
而して、前記熱風発生器から導入された熱風は前記熱風ノズル６内に流入し、該熱風ノズル６に設けられた噴出孔６ａ，６ａ…から噴出した熱風が前記チューブ本体２の上端部２ｃ内周部を加熱した後、高熱排気として前記排気管７内に流出し、該高熱排気は該排気管７の下流側に設置されたブロアーによって吸引されて該排気管７の下流側に排出される。
【０００７】
前記チューブ本体２の上端部２ｃが所定温度に加熱されて軟化溶融されると、該樹脂性チューブ１は前記シール部加熱装置５から取り外され、図１１に示すシールクランプ装置８内に搬入され、該シールクランプ装置８のクランプ部８ａによって前記チューブ本体２の軟化溶融された上端部２ｃがクランプされて融着しシールされる。
【０００８】
然しながら、前述した前記シール部加熱装置５に於て、前記樹脂性チューブ１のシール部となる上端部２ｃが過熱され、過熱部が発生し、又は、該上端部２ｃが例えば図１２に示す如くチューリップ状に拡大した場合、図１３に示す如く、火膨れＳ等が発生し、又は、前記樹脂性チューブ１の上端部２ｃが拡大して変形或いは外観不良となる虞があり、反対に、前記上端部２ｃが加熱不足の場合、シール不足が発生しパンクの発生の虞がある。
【０００９】
そこで、例えば、前記樹脂性チューブ１のシール部となる上端部２ｃの加熱不足を防ぐために、前記熱風発生器から導入する前記熱風の温度を上げると該熱風が前記樹脂性チューブ１のシール部となる上端部２ｃ、及び、該上端部２ｃ近傍を過熱する虞があり、又、前記熱風発生器から導入する熱風量を増大すると、該熱風が該樹脂性チューブ１のシール部となる上端部２ｃの外側部側に噴出し、該外側部近傍を過熱したり、前記樹脂性チューブ１の表面を加熱する虞があり、更には、外部の治具や機械部品を加熱する虞がある。
【００１０】
反対に、前記樹脂性チューブ１のシール部となる上端部２ｃの過熱を防ぐために、前記ブロアーの排気力を高めると、前記熱風は該ブロアーに吸引されて熱風の排出が迅速になり、前記樹脂性チューブ１のシール部となる上端部２ｃの過熱を防ぐことができるが、該樹脂性チューブ１のシール部となる上端部２ｃの外側部近傍から過度に外気を吸引し、該外気によって該樹脂性チューブ１のシール部となる上端部２ｃの外側部を過度に冷却する虞がある。
【００１１】
しかし、前記樹脂性チューブ１のシール部となる上端部２ｃの外側部側へ熱風を漏出させることなく、又、該上端部２ｃの外側部近傍から外気を吸引することなく該上端部２ｃを最適な条件で加熱するため、前記ブロアー、及び、前記熱風発生器を微調節することは極めて困難であった。
【００１２】
そのため、従来は、前記樹脂性チューブ１のシール部となる上端部２ｃの外側部側へ熱風を漏出させることのないように、前記ブロアーの排気力をやや高めに設定し、該上端部２ｃの外側部近傍から若干の外気を吸引することを許容していた。
【００１３】
更に、他の従来例として、前記排気管７内に流入した熱風の排気をコンプレッサーエアによって排出側に吹飛ばすように構成された樹脂性チューブのシール部加熱装置が知られているが、該装置に於ても、熱風の排出が迅速になり、前記樹脂性チューブ１のシール部となる上端部２ｃの過熱を防ぐことができるが、該樹脂性チューブ１のシール部となる上端部２ｃの外側部近傍から外気を吸引し、該外気によって該樹脂性チューブ１のシール部となる上端部２ｃの外側部を過度に冷却する虞があった。
【００１４】
そこで、樹脂製チューブのシール部加熱装置に於て、樹脂性チューブのシール部の過熱又は冷却を防止し、良好なシールを得るために解決すべき技術的課題が生じてくるのであり、本発明は該課題を解決することを目的とする。
【００１５】
【課題を解決するための手段】
本発明は上記目的を達成するために提案されたものであり、樹脂性チューブのクランプシール部となる端部内周部を熱風を噴出して加熱するノズルが設けられると共に、該ノズルの熱風供給通路に、該熱風の一部を取込んで渦巻流を発生させ、該渦巻流によって前記ノズルから噴出される熱風を吸引し排出するための渦巻流発生手段が設けられ、更に、該熱風を排気すべく前記樹脂性チューブのクランプシール部となる端部を遊嵌自在であり、且つ、前記ノズル、及び、前記渦巻流発生手段を所定間隔を有して囲包する排気外筒が設けられた樹脂製チューブのシール部加熱装置に於て、前記排気外筒、又は、該排気外筒と連通される排気通路内に前記熱風の排気量を調節する排気量調節手段を設け、該排気量調節手段によって前記樹脂性チューブのクランプシール部となる端部と、該端部を遊嵌する前記排気外筒間の隙間に於ける熱風の外部への漏出、又は、外気の吸収を制限する樹脂性チューブのシール部加熱装置を提供するものである。
【００１６】
【発明の実施の形態】
以下、本発明の一実施の形態を図１乃至図７に従って詳述する。尚、説明の都合上、従来例と同一構成部分については同一符号を付してその説明を省略する。図１に於いて、９は樹脂性チューブ１のシール部加熱装置である。該シール部加熱装置９は、上下開放の排気管１０と、該排気管１０の上端部に連結されている熱風発生器１１と、該熱風発生器１１の下端部に連結され、且つ、前記排気管１０の内部に配設された加熱筒１２と、該加熱筒１２に連結された渦巻流発生手段としての渦巻流発生器１３と、該渦巻流発生器１３の下部に配設されているノズル１４と、該ノズル１４の外側に所定間隙を有して配設された外筒１５とから成る。尚、該外筒１５と前記排気管１０は連通する排気外筒を構成する。
【００１７】
そして、前記排気管１０は上端部近傍を側方へ折曲して排気延設管１０ａとし、前記排気管１０と前記加熱筒１２との間に形成されている排気孔１６から排出される排気を前記排気延設管１０ａから外方へ排出するように形成されている。更に、図２に示す如く、前記排気延設管１０ａ内には前記排気の排気量を調節するため排気量調節手段としての蝶型弁１７が回転軸１８に固着されて回転自在に配設され、図３に示す如く、該回転軸１８はトルクアクチュエータ１９に連結され、該トルクアクチュエータ１９はエアーによって作動されるように構成されている。従って、前記排気延設管１０ａ内の排気は前記蝶型弁１７によって排気量を調節されて排出される。
【００１８】
又、図４に示すように、前記排気管１０の下端部には鍔部１０ｂが外側へ向って突設されており、更に、前記渦巻流発生器１３の本体部１３ａもフランジ１３ｂが外方へ向って突設されており、更に、前記外筒１５の上方部位にも外方へ向って鍔部１５ａが突設されている。之等鍔部１０ｂ，１５ａ並びに前記フランジ１３ｂの外側端面は夫々一致するように形成されており、そして、之等鍔部１０ｂ，１５ａ並びにフランジ１３ｂには夫々ボルト孔が開穿されている。
【００１９】
そこで、架台２０に設けられている開口部２０ａ上縁部に於て、該架台２０の上面に前記渦巻流発生器１３のフランジ１３ｂを載置すると共に、該フランジ１３ｂの上部に前記排気管１０に設けた鍔部１０ｂを重ね、更に、前記ノズル１４のフランジ１４ａをスペーサ２１の下面で、且つ、該架台２０の開口部２０ａの開口側面に嵌合し、更に、該フランジ１４ａを下方から押圧する如く前記外筒１５の上端面を該フランジ１４ａに当接すると共に、該外筒１５の前記鍔部１５ａを前記架台２０の下面に当接し、そして、該架台２０に設けられている通し孔２０ｂ，２０ｂ…に前記鍔部１０ｂ，１５ａ及びフランジ１３ｂに設けられている各ボルト孔を一致させ、ボルト２２，２２…によって前記架台２０に前記シール部加熱装置９が設置されている。
【００２０】
そして、前記外筒１５の下面解放部１５ｂの内径は、前記樹脂性チューブ１のクランプシール部となる上端部２ｃの開口状態に於ける外径よりもやや大径に形成され、該上端部２ｃが遊挿自在に構成されている。尚、図に於て、Ｈは樹脂性チューブ１のホルダーである。
【００２１】
而して、図１及び図４に示す如く、上下逆方向に保持され、充填物Ｆが充填された樹脂性チューブ１の上端部２ｃ開口内に、前記シール部加熱装置９の前記ノズル１４の先端部が上方から所定長さ挿入された後、前記熱風発生器１１から熱風が吐出されて前記ノズル１４に送られると、該ノズル１４の下端部に設けられている噴出口２３から熱風が噴出され、前記樹脂性チューブ１の上端部２ｃ内周部を加熱した後、高熱排気として前記排気孔１６内に流入する。
【００２２】
次に、前記渦巻流発生器１３及びノズル１４の構成を説明する。先ず、該渦巻流発生器１３は、図４に示すように、上下面解放の筒状の本体部１３ａを有し、且つ、該本体部１３ａには前述したようにフランジ１３ｂが突設されており、該フランジ１３ｂには前記排気管１０と加熱筒１２との間に形成されている排気孔１６に連通する排気口１３ｃ，１３ｃ…が設けられており、そして、前述したように架台２０にボルト２２，２２…にて固定されている。
【００２３】
而して、該渦巻流発生器１３の本体部１３ａは前述したように上下面解放の筒状体にて形成されており、且つ、該本体部１３ａの上端面は皿状に凹欠されて支承面１３ｄを形成し、該支承面１３ｄに前記加熱筒１２の下端面を嵌合させて双方が連結されている。又、該本体部１３ａの外側面下方部位は所定長さに及んで縮径する如く切欠されて熱風取込通路２４を形成できるようにし、且つ、該熱風取込通路２４の上端面は斜め上方へ斜欠され、そして、取込まれた熱風が上方へ噴出し易いように形成されている。而も、該熱風取込通路２４には図５に示すように、螺旋状翼２５が設けられており、前記取込まれた熱風は該螺旋状翼２５に沿って螺旋状又は渦巻状に上方へ旋回し乍ら前記排気孔１６を経て外側へ逃散するように形成されている。
【００２４】
次に、前記ノズル１４について図４、図６及び図７に従って説明する。該ノズル１４は前記加熱筒１２及び渦巻流発生器１３と外径を略等しく形成し、且つ、内径を該渦巻流発生器１３と略等しく形成した上下面解放の筒状本体１４ｂを有し、且つ、該筒状本体１４ｂには前述したように前記架台２０に設けた開口部２０ａの内側面に当接して該架台２０に嵌合されるフランジ１４ａを有し、そして、下部に配設されている前記外筒１５と前記スペーサ２１との間に挟持された状態でボルト２２，２２…にて該架台２０に締結することにより、該ノズル１４が該架台２０に固設されている。
【００２５】
更に、該ノズル１４の筒状本体１４ｂは上方部内側面を該筒状本体１４ｂの内径を所定長さに及んで拡径する如く切欠し、そして、上記渦巻流発生器１３の下方部外側面の切欠部に対峙し、所定間隙を有して前記熱風取込通路２４を形成し、且つ、該熱風取込通路２４に熱風を取込むために該渦巻流発生器１３の下端面と該ノズル１４の筒状本体１４ｂの前記切欠部下底面との間に空隙部２６を形成し、そして、熱風発生器１１から加熱筒１２を介して送られる熱風の一部を該空隙部２６にて捕捉し、そして、前記熱風取込通路２４に圧送する。
【００２６】
該熱風取込通路２４には前記螺旋状翼２５が設けられているので、該熱風取込通路２４に圧入された熱風は該螺旋状翼２５にて一定方向に螺旋流又は渦巻流を起し、そして、前記排気孔１６内を加速し乍ら上昇して外部へ逃散する。
又、該ノズル１４の筒状本体１４ｂの下端部位外側面は図１及び図４に示すように、外径寸法が所定長さに及んで縮径され、そして、前記外筒１５の下面解放部１５ｂから挿入される前記樹脂性チューブ１の上端部２ｃ開口部に遊挿できるように形成されている。
【００２７】
一方、図４、図６及び図７に示す如く、前記筒状本体１４ｂ内部から該筒状本体１４ｂ下方に延設して渦巻流発生部材２７が固着されており、該渦巻流発生部材２７の下端部には円板状の先端部材２８が固着され、該先端部材２８は該先端部材２８の上面中央部に熱風連通孔となる環状溝２９が形成され、該環状溝２９の外側に複数の渦巻状溝３０，３０…が放射状に形成され、且つ、渦巻状溝３０，３０…の溝底部は中心部よりも外周部が高くなるように放射方向にやや傾斜して形成されている。
【００２８】
又、該先端部材２８の上面に、筒体の外周面に複数条の螺旋リブ３１，３１…が形成された螺旋流発生体３２が設けられ、該螺旋リブ３１，３１…間に螺旋状溝３３，３３…が形成されている。
更に、該螺旋流発生体３２の上部には円板状の上板３４が設けられ、該上板３４には熱風を下方向に流通させる多数の孔３４ａ，３４ａ…が開穿されている。
【００２９】
而して、該上板３４は前記螺旋流発生体３２上端部に当接され、前記先端部材２８は該螺旋流発生体３２の下端部に当接され、そして、該上板３４及び螺旋流発生体３２の中心部に設けられた挿入孔を介し、該上板３４の上面からボルト３５を挿入し、更に、前記先端部材２８の中心部に設けられている雌ネジ部２８ａに該ボルト３５を螺着して前記上板３４及び先端部材２８を前記螺旋流発生体３２に一体的に固定している。
【００３０】
斯くして、前記上板３４の孔３４ａ，３４ａ…から進入した熱風は前記螺旋状溝３３，３３…によって螺旋方向に回転力を付与されて下方に送られ、図７（ａ）に示す如く、前記環状溝２９内で回転しながら前記渦巻状溝３０，３０…に送られ、該渦巻状溝３０，３０…によって放射状に、且つ、渦巻状に噴出される。而して、該渦巻流の方向は前記渦巻流発生器１３による渦巻流と同一方向である。
【００３１】
図７（ｂ）は前記ノズル１４の前記噴出口２３から噴出される熱風の噴出状態を示し、前記渦巻状溝３０，３０…が形成された前記先端部材２８の上面外周端は波形に形成され、該上面外周端の直上位置の前記筒状本体１４ｂの下端部も該先端部材２８の上面外周端と所定間隔離間する波形形状に形成されており、この離間する所定間隔が前記噴出口２３となっており、前記熱風は図１及び図４に示すように該噴出口２３から放射方向、且つ、螺旋方向に吹き上げられて前記樹脂性チューブ１の上端部２ｃ内周面に噴射され、そして、前記渦巻流発生器１３によって生成された渦巻流に吸引され、且つ、相互作用によって前記排気孔１６内を渦巻状に旋回し乍ら外部へ排出される。
【００３２】
従って、該排気孔１６内の熱風を外部へ排出するためのブロワー等を設けることなく、前記上下の渦巻流の相互作用によって自然に該排気孔１６内の前記熱風を高速で外部へ排気させることが可能となる。
これによって、熱風は従来例の如く、前記樹脂性チューブ１の上端部２ｃ内周面を上方に単純通過することなく、該上端部２ｃ内周面を回転するため、該熱風が該上端部２ｃ内周面に長時間留まることとなり、該上端部２ｃ内周面を均一に加熱することができ良好なシールを得ることが可能となる。又、前記排気孔１６内を上昇して外部へ排気される熱風は前述したように、渦巻流発生器１３による渦巻流と下部のノズル１４によって生じる渦巻流の双方が相互に作用し合って該渦巻流の流速が早くなり、依って、排気熱風が速やかに外方へ排出されるので、シール部加熱装置９の各部、各機器を高熱化させることが抑制され、更に、過熱による危険を未然に防止することができる。
【００３３】
又、前記排気孔１６、及び、前記排気延設管１０ａ内の排気熱風は前記トルクアクチュエータ１９によって作動される前記蝶型弁１７によって調節されて排出され、特に、該蝶型弁１７によって排気量の微調整も可能となるため、前記外筒１５の下面解放部１５ｂと前記樹脂性チューブ１の上端部２ｃとの隙間から熱風が外部に漏出しないようにすると共に、同時に、該隙間から外部の過度な冷気を吸引しないように精度良く最適な条件に制御することが可能となる。
【００３４】
これによって、前記外筒１５の下面解放部１５ｂと前記樹脂性チューブ１の上端部２ｃとの隙間から熱風が外部に漏出しないため、該上端部２ｃの外側面が過熱されることがなく、従って、外観不良や変形、又は、火膨れ等の発生を防止できると共に、反対に該隙間から外部の過度の冷気を吸引しないため、前記樹脂性チューブ１の上端部２ｃが過度に冷却されて溶着不良を起こすこともない。
【００３５】
尚、本発明は、本発明の精神を逸脱しない限り種々の改変を為すことができ、そして、本発明が該改変されたものに及ぶことは当然である。
【００３６】
【発明の効果】
本発明は上記一実施の形態に詳述したように、樹脂製チューブのシール部加熱装置に於て、排気外筒、又は、該排気外筒と連通される排気通路内に熱風の排気量を調節する排気量調節手段を設け、該排気量調節手段によって前記樹脂性チューブのクランプシール部となる端部と、該端部を遊嵌する排気外筒間の隙間に於ける熱風の外部への漏出、又は、外気の吸収を制限するように構成したので、樹脂性チューブのクランプシール部となる端部外周部近傍に於ける過度な外気の吸収、及び、前記熱風の外部への漏出をいずれも同時に規制することが可能となり、樹脂性チューブのシール部の外観不良、変形、火膨れ、及び、溶着不良を防止することができる等、正に著大なる効果を奏する発明である。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示し、樹脂性チューブのシール部加熱装置の一部切欠縦断面図。
【図２】図１の排気延設管と蝶型弁の詳細斜視図。
【図３】図１の蝶型弁と該蝶型弁を作動させるトルクアクチュエータの平面図。
【図４】本発明の一実施の形態を示し、樹脂性チューブのシール部加熱装置の詳細一部切欠縦断面図。
【図５】図１の渦巻流発生器の正面図。
【図６】図１の渦巻流発生部材の斜視図。
【図７】（ａ）図６の渦巻流発生部材の環状溝及び渦巻状溝による熱風の流れを示す説明図。
（ｂ）図４の噴出口から噴出する熱風の噴出方向を示す説明図。
【図８】従来例を示し、完成した樹脂性チューブの正面図。
【図９】従来例を示し、樹脂性チューブの充填状態を示す一部切欠縦断面図。
【図１０】従来例を示し、樹脂性チューブのシール部加熱装置の一部切欠縦断面図。
【図１１】従来例を示し、樹脂性チューブのクランプシール状態を示す一部切欠縦断面図。
【図１２】従来例を示し、樹脂性チューブのシール部加熱後の一部切欠縦断面図。
【図１３】従来例を示し、樹脂性チューブのクランプシール後の正面図。
【符号の説明】
１ 樹脂性チューブ
９ シール部加熱装置
１４ ノズル[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heating a sealing portion of a resin tube, and an end portion serving as a sealing portion of the resin tube for clamping and sealing a resin tube for filling a filler such as cosmetics or an adhesive. In the heating device for the sealing portion of the resin tube, which blows hot air to heat and softens and melts, in particular, by adjusting the exhaust amount of the hot air, the outer peripheral portion of the end portion which becomes the clamp seal portion of the resin tube The present invention relates to a seal tube heating device for a resin tube for restricting absorption of outside air in the vicinity or leakage of the hot air to the outside, and performing good heating of the seal unit.
[0002]
Problems to be solved by the prior art and the invention
A conventional resin tube of this type will be described with reference to FIGS. In FIG. 8, reference numeral 1 denotes a resin tube as a finished product filled with a filler such as a cosmetic or an adhesive, and the resin tube 1 is formed of a flexible synthetic resin. A neck 2a having a spout (not shown) at one end of the tube body 2 and a shoulder 2b connecting the neck 2a and the end of the tube body 2 over the entire circumference thereof. 2, a threaded cap 3 is detachably provided on the neck 2a, and the tube body 2 is filled with a filling material (not shown). The other end is clamp-sealed by heat fusion.
[0003]
Next, a method of filling the resin tube 1 with the filling material and a method of clamping and sealing will be described. First, as shown in FIG. 9, a cap 3 is attached to the resin tube 1 to close the spout, and the cap is closed. The resin tube 1 is held upside down with the side 3 facing downward, the upper end 2c of the tube body 2 is opened, and a filling nozzle 4 for filling the filling material F is inserted into the upper end 2c. Then, the filling material F is filled in the tube main body 2.
[0004]
Next, as shown in FIG. 10, the resin tube 1 is carried into a sealing portion heating device 5, and the sealing portion heating device 5 is inserted into an opening of an upper end portion 2 c serving as a clamp seal portion of the resin tube 1. The tip of the hot-air nozzle 6 provided at a predetermined length is inserted.
Here, the sealing portion heating device 5 will be described. A hot air nozzle 6 provided in the sealing portion heating device 5 has a plurality of orifice holes 6a, 6a of a simple multi-hole nozzle type that radially emits hot air to the outer periphery of a tip portion. Are formed, and the hot-air nozzle 6 is connected to a hot-air generator (not shown) provided with a heat source. It is known that a simple gap nozzle type (slit type) jetting hole is used instead of the simple multi-hole nozzle type jetting hole 6a.
[0005]
The hot air nozzle 6 is surrounded by an exhaust pipe 7 at a predetermined interval, and the exhaust pipe 7 has a blower (not shown) for suctioning exhaust gas on the downstream side (upper side in the figure). The lower end of the exhaust pipe 7 extends slightly below the tip of the hot air nozzle 6, and an inward flange 7b having an opening 7a at the center is formed at the lower end. The opening 7a is formed to have a slightly larger diameter than the outer diameter of the upper end 2c of the tube body 2 in the open state.
[0006]
The hot air introduced from the hot air generator flows into the hot air nozzle 6, and the hot air blown out from the blowing holes 6a, 6a,. After heating the inner peripheral portion, it flows out into the exhaust pipe 7 as hot exhaust, and the hot exhaust is sucked by a blower installed on the downstream side of the exhaust pipe 7 and discharged to the downstream side of the exhaust pipe 7. You.
[0007]
When the upper end portion 2c of the tube main body 2 is heated to a predetermined temperature and softened and melted, the resinous tube 1 is removed from the sealing portion heating device 5, and is loaded into a seal clamp device 8 shown in FIG. The softened upper end 2c of the tube body 2 is clamped by the clamp portion 8a of the seal clamp device 8, and is fused and sealed.
[0008]
However, in the above-mentioned sealing portion heating device 5, the upper end portion 2c serving as the sealing portion of the resinous tube 1 is overheated to generate an overheated portion, or the upper end portion 2c is, for example, as shown in FIG. When expanded in a tulip shape, as shown in FIG. 13, blisters S or the like may occur, or the upper end portion 2c of the resinous tube 1 may expand and deform or have a poor appearance. If the upper end portion 2c is insufficiently heated, insufficient sealing may occur and puncture may occur.
[0009]
Therefore, for example, when the temperature of the hot air introduced from the hot air generator is increased in order to prevent insufficient heating of the upper end portion 2c serving as the sealing portion of the resin tube 1, the hot air is brought into contact with the sealing portion of the resin tube 1. There is a risk that the upper end portion 2c and the vicinity of the upper end portion 2c may be overheated, and if the amount of hot air introduced from the hot air generator is increased, the upper end portion 2c serving as a sealing portion of the resinous tube 1 Of the resin tube 1 may be overheated, or the surface of the resin tube 1 may be heated, and further, there is a risk of heating an external jig or a mechanical part.
[0010]
Conversely, when the exhaust power of the blower is increased to prevent overheating of the upper end portion 2c serving as the seal portion of the resin tube 1, the hot air is sucked by the blower, and the hot air is quickly discharged, so that the resin is discharged. The overheating of the upper end portion 2c serving as the sealing portion of the flexible tube 1 can be prevented, but the outside air is excessively sucked from the vicinity of the outer portion of the upper end portion 2c serving as the sealing portion of the resinous tube 1, and the resin is removed by the outside air. There is a possibility that the outer portion of the upper end portion 2c serving as the seal portion of the conductive tube 1 may be excessively cooled.
[0011]
However, the upper end 2c is optimized without leaking hot air to the outer side of the upper end 2c serving as a seal portion of the resin tube 1 and without sucking outside air from near the outer side of the upper end 2c. Therefore, it was extremely difficult to finely adjust the blower and the hot-air generator because the heating was carried out under such conditions.
[0012]
Therefore, conventionally, the exhaust power of the blower is set to be slightly higher so that hot air does not leak to the outer side of the upper end portion 2c serving as a seal portion of the resinous tube 1, and the upper end portion 2c Slight outside air was allowed to be sucked in from the vicinity of the outside.
[0013]
Further, as another conventional example, there is known a device for heating a seal portion of a resin tube, which is configured to blow the exhaust of hot air flowing into the exhaust pipe 7 to the exhaust side by compressor air. In this case, the hot air is quickly discharged, and the upper end portion 2c serving as the sealing portion of the resin tube 1 can be prevented from being overheated. However, the outside of the upper end portion 2c serving as the sealing portion of the resin tube 1 can be prevented. There is a possibility that outside air is sucked from the vicinity of the upper portion and the outside air excessively cools the outer portion of the upper end portion 2c serving as the sealing portion of the resinous tube 1.
[0014]
Therefore, in the apparatus for heating the seal portion of the resin tube, a technical problem to be solved to prevent overheating or cooling of the seal portion of the resin tube and to obtain a good seal arises. Aims to solve the problem.
[0015]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above object, and a nozzle is provided for ejecting and heating hot air at an end inner peripheral portion serving as a clamp seal portion of a resin tube, and a hot air supply passage of the nozzle is provided. A swirl flow generating means for taking in a part of the hot air to generate a swirl flow, sucking and discharging the hot air ejected from the nozzle by the swirl flow, and further exhausting the hot air. In order to freely fit the end of the resin tube serving as the clamp seal portion, the resin tube is provided with an exhaust outer cylinder surrounding the nozzle and the spiral flow generating means at a predetermined interval. In the apparatus for heating a sealing portion of a tube made of a tube, an exhaust amount adjusting means for adjusting an exhaust amount of the hot air is provided in the exhaust outer cylinder or in an exhaust passage communicating with the exhaust outer cylinder, The resinous resin Heat leakage to the outside of the gap between the end portion of the tube serving as the clamp seal portion and the exhaust outer tube in which the end portion is loosely fitted, or the sealing portion heating of the resinous tube for limiting absorption of outside air An apparatus is provided.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. For convenience of description, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 1, reference numeral 9 denotes a device for heating the sealing portion of the resin tube 1. The sealing unit heating device 9 includes an exhaust pipe 10 that is open up and down, a hot air generator 11 connected to an upper end of the exhaust pipe 10, and a hot air generator 11 that is connected to a lower end of the hot air generator 11. A heating tube 12 disposed inside the pipe 10, a spiral flow generator 13 connected to the heating tube 12 as a spiral flow generating means, and a nozzle disposed below the spiral flow generator 13 14 and an outer cylinder 15 disposed outside the nozzle 14 with a predetermined gap. Note that the outer tube 15 and the exhaust pipe 10 constitute an exhaust outer tube communicating with each other.
[0017]
The exhaust pipe 10 is bent laterally in the vicinity of the upper end to form an exhaust extension pipe 10 a, and exhaust gas discharged from an exhaust hole 16 formed between the exhaust pipe 10 and the heating cylinder 12. Is discharged outwardly from the exhaust extension pipe 10a. Further, as shown in FIG. 2, a butterfly valve 17 as an exhaust amount adjusting means for adjusting the exhaust amount of the exhaust is fixed to the rotating shaft 18 and rotatably disposed in the exhaust extension pipe 10a. As shown in FIG. 3, the rotating shaft 18 is connected to a torque actuator 19, and the torque actuator 19 is configured to be operated by air. Therefore, the exhaust gas in the exhaust extension pipe 10a is exhausted by adjusting the exhaust amount by the butterfly valve 17.
[0018]
As shown in FIG. 4, a flange portion 10b is provided at a lower end portion of the exhaust pipe 10 so as to protrude outward, and further, a main body portion 13a of the spiral flow generator 13 has a flange 13b extending outward. Further, a flange portion 15a is also provided on an upper portion of the outer cylinder 15 so as to protrude outward. The outer flanges 10b, 15a and the outer end surfaces of the flange 13b are formed so as to coincide with each other, and bolt holes are formed in the flanges 10b, 15a and the flange 13b, respectively.
[0019]
Therefore, the flange 13b of the spiral flow generator 13 is placed on the upper surface of the gantry 20 at the upper edge of the opening 20a provided in the gantry 20, and the exhaust pipe 10 is placed above the flange 13b. The flange 14a of the nozzle 14 is fitted on the lower surface of the spacer 21 and the side surface of the opening 20a of the gantry 20, and the flange 14a is pressed from below. As described above, the upper end surface of the outer cylinder 15 abuts on the flange 14a, the flange portion 15a of the outer cylinder 15 abuts on the lower surface of the gantry 20, and a through hole 20b formed in the gantry 20 is provided. , 20b... Are aligned with the respective bolt holes provided in the flanges 10b, 15a and the flange 13b, and the bolts 22, 22,. To have.
[0020]
The inner diameter of the lower surface release portion 15b of the outer cylinder 15 is formed to be slightly larger than the outer diameter of the upper end portion 2c serving as a clamp seal portion of the resin tube 1 in an open state. Are configured to be freely inserted. In the drawings, H is a holder for the resin tube 1.
[0021]
Thus, as shown in FIGS. 1 and 4, the nozzle 14 of the sealing portion heating device 9 is placed in the opening of the upper end 2 c of the resin tube 1 which is held upside down and filled with the filler F. When the hot air is discharged from the hot air generator 11 and sent to the nozzle 14 after the tip is inserted for a predetermined length from above, the hot air is blown out from the outlet 23 provided at the lower end of the nozzle 14. Then, after heating the inner peripheral portion of the upper end portion 2c of the resin tube 1, the resin tube 1 flows into the exhaust hole 16 as high-temperature exhaust gas.
[0022]
Next, the configurations of the spiral flow generator 13 and the nozzle 14 will be described. First, as shown in FIG. 4, the spiral flow generator 13 has a cylindrical main body 13a whose upper and lower surfaces are open, and the main body 13a is provided with a flange 13b protruding as described above. The flange 13b is provided with exhaust ports 13c, 13c,... Communicating with the exhaust holes 16 formed between the exhaust pipe 10 and the heating cylinder 12. Are fixed by bolts 22, 22...
[0023]
As described above, the main body 13a of the spiral flow generator 13 is formed of a cylindrical body whose upper and lower surfaces are open, and the upper end surface of the main body 13a is notched like a dish. A bearing surface 13d is formed, and the lower surface of the heating cylinder 12 is fitted to the bearing surface 13d and both are connected. The lower portion of the outer surface of the main body portion 13a is cut out so as to reduce the diameter over a predetermined length so that the hot air intake passage 24 can be formed, and the upper end surface of the hot air intake passage 24 is obliquely upward. It is formed so that the hot air which is taken in and is easily blown upward. As shown in FIG. 5, spiral wings 25 are provided in the hot air intake passage 24, and the captured hot air flows upward along the spiral wings 25 in a spiral or spiral manner. It is formed so as to escape outward through the exhaust hole 16 while turning.
[0024]
Next, the nozzle 14 will be described with reference to FIGS. The nozzle 14 has a cylindrical body 14b having an outer diameter substantially equal to that of the heating cylinder 12 and the spiral flow generator 13 and an inner diameter substantially equal to that of the spiral flow generator 13 and having open upper and lower surfaces. In addition, the cylindrical body 14b has a flange 14a that abuts against the inner surface of the opening 20a provided in the gantry 20 and is fitted to the gantry 20 as described above, and is disposed at the lower part. The nozzles 14 are fixed to the gantry 20 by being fastened to the gantry 20 with bolts 22, 22,... While being sandwiched between the outer cylinder 15 and the spacer 21.
[0025]
Further, the cylindrical main body 14b of the nozzle 14 is notched so as to increase the inner diameter of the upper part of the cylindrical main body 14b to a predetermined length, and the outer surface of the lower part of the spiral flow generator 13 is cut off. The lower end face of the spiral flow generator 13 and the nozzle 14 are formed so as to face the notch, have a predetermined gap, form the hot air intake passage 24 and take in hot air into the hot air intake passage 24. A gap 26 is formed between the bottom surface of the cylindrical body 14b and the lower surface of the notch, and a portion of the hot air sent from the hot air generator 11 through the heating cylinder 12 is captured by the gap 26; Then, it is pressure-fed to the hot air intake passage 24.
[0026]
Since the spiral wings 25 are provided in the hot air intake passage 24, the hot air press-fitted into the hot air intake passage 24 causes a spiral flow or a spiral flow in the spiral airfoil 25 in a certain direction. Then, it rises while accelerating inside the exhaust hole 16 and escapes to the outside.
The outer surface of the lower end portion of the cylindrical body 14b of the nozzle 14 is reduced in diameter to a predetermined length as shown in FIGS. It is formed so that it can be loosely inserted into the opening of the upper end 2c of the resinous tube 1 inserted from 15b.
[0027]
On the other hand, as shown in FIGS. 4, 6, and 7, a spiral flow generating member 27 is fixedly extended from the inside of the cylindrical body 14b to below the cylindrical body 14b. A disk-shaped tip member 28 is fixed to the lower end portion. The tip member 28 has an annular groove 29 formed as a hot air communication hole in the center of the upper surface of the tip member 28, and a plurality of annular grooves 29 outside the annular groove 29. Are spirally formed, and the bottoms of the spiral grooves 30, 30,... Are formed to be slightly inclined in the radial direction so that the outer peripheral portion is higher than the central portion.
[0028]
Also, a spiral flow generator 32 having a plurality of spiral ribs 31, 31 formed on the outer peripheral surface of the cylindrical body is provided on the upper surface of the tip member 28, and a spiral groove is formed between the spiral ribs 31, 31,. Are formed.
Further, a disk-shaped upper plate 34 is provided on the upper part of the spiral flow generator 32, and a number of holes 34a, 34a,.
[0029]
Thus, the upper plate 34 is in contact with the upper end of the spiral flow generator 32, the tip member 28 is in contact with the lower end of the spiral flow generator 32, and the upper plate 34 and the spiral flow generator 32 are in contact with each other. A bolt 35 is inserted from the upper surface of the upper plate 34 through an insertion hole provided at the center of the generator 32, and the bolt 35 is further inserted into a female screw 28 a provided at the center of the tip member 28. And the upper plate 34 and the tip member 28 are integrally fixed to the spiral flow generator 32.
[0030]
Thus, the hot air that has entered through the holes 34a, 34a,... Of the upper plate 34 is sent downward by applying a rotational force in the spiral direction by the spiral grooves 33, 33, as shown in FIG. , While being rotated in the annular groove 29, are sent to the spiral grooves 30, 30, and are radially and spirally ejected by the spiral grooves 30, 30. Thus, the direction of the spiral flow is the same as the spiral flow generated by the spiral flow generator 13.
[0031]
FIG. 7 (b) shows a state in which hot air is ejected from the ejection port 23 of the nozzle 14, and an outer peripheral end of an upper surface of the tip member 28 in which the spiral grooves 30, 30,. The lower end of the cylindrical body 14b at a position immediately above the outer peripheral end of the upper surface is also formed in a waveform shape that is separated from the upper peripheral end of the tip member 28 by a predetermined distance. As shown in FIGS. 1 and 4, the hot air is blown up in the radial direction and the helical direction from the jet port 23 and is jetted onto the inner peripheral surface of the upper end portion 2c of the resin tube 1, and The vortex generated by the vortex generator 13 is sucked by the vortex, and is swirled through the exhaust hole 16 and discharged to the outside by interaction.
[0032]
Therefore, the hot air in the exhaust hole 16 is naturally exhausted at high speed to the outside by the interaction of the upper and lower spiral flows without providing a blower or the like for discharging the hot air in the exhaust hole 16 to the outside. Becomes possible.
As a result, the hot air rotates on the inner peripheral surface of the upper end portion 2c without simply passing upward through the inner peripheral surface of the upper end portion 2c of the resin tube 1 as in the conventional example. The inner peripheral surface stays for a long time, so that the inner peripheral surface of the upper end portion 2c can be uniformly heated and a good seal can be obtained. As described above, the hot air that rises inside the exhaust hole 16 and is exhausted to the outside is generated by the interaction between the swirl flow generated by the swirl flow generator 13 and the swirl flow generated by the lower nozzle 14. Since the flow velocity of the vortex flow becomes faster and the exhaust hot air is quickly discharged to the outside, it is possible to suppress the heating of each part of the seal portion heating device 9 and each device, and furthermore, to prevent the danger due to overheating. Can be prevented.
[0033]
The exhaust hot air in the exhaust hole 16 and the exhaust pipe 10 a is adjusted and discharged by the butterfly valve 17 operated by the torque actuator 19, and in particular, the amount of exhaust air is discharged by the butterfly valve 17. Can be finely adjusted, so that hot air does not leak out from the gap between the lower surface release portion 15b of the outer cylinder 15 and the upper end portion 2c of the resin tube 1, and at the same time, external It is possible to accurately control the optimum conditions so that excessive cold air is not sucked.
[0034]
Accordingly, hot air does not leak out from the gap between the lower surface release portion 15b of the outer cylinder 15 and the upper end portion 2c of the resin tube 1, so that the outer surface of the upper end portion 2c is not overheated. In addition, it is possible to prevent poor appearance and deformation, or occurrence of blistering, etc., and on the contrary, since excessive external cold air is not sucked through the gap, the upper end portion 2c of the resinous tube 1 is excessively cooled and poor welding is caused. Also does not cause.
[0035]
The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
[0036]
【The invention's effect】
As described in detail in the above-described embodiment, the present invention provides, in a resin tube sealing portion heating device, an exhaust outer cylinder or an exhaust passage of hot air in an exhaust passage communicating with the exhaust outer cylinder. An exhaust amount adjusting means for adjusting the amount of hot air to the outside in a gap between an end portion serving as a clamp seal portion of the resinous tube and the exhaust outer tube in which the end portion is loosely fitted. Since leakage or the absorption of outside air is configured to be restricted, excessive absorption of outside air in the vicinity of the outer peripheral portion of the end portion serving as the clamp seal portion of the resin tube, and leakage of the hot air to the outside may occur. This is an invention which has a very great effect, for example, it is also possible to restrict the appearance of the seal portion of the resin tube, deformation, blistering, and welding failure.
[Brief description of the drawings]
FIG. 1 shows one embodiment of the present invention, and is a partially cutaway longitudinal sectional view of a device for heating a sealing portion of a resin tube.
FIG. 2 is a detailed perspective view of the exhaust extension pipe and the butterfly valve of FIG. 1;
FIG. 3 is a plan view of the butterfly valve of FIG. 1 and a torque actuator that operates the butterfly valve.
FIG. 4 shows an embodiment of the present invention and is a detailed partially cutaway longitudinal sectional view of a device for heating a sealing portion of a resin tube.
FIG. 5 is a front view of the spiral flow generator of FIG. 1;
FIG. 6 is a perspective view of the spiral flow generating member of FIG. 1;
FIG. 7A is an explanatory view showing a flow of hot air caused by an annular groove and a spiral groove of the spiral flow generating member of FIG. 6;
(B) Explanatory drawing which shows the ejection direction of the hot air which gushes from the ejection opening of FIG.
FIG. 8 is a front view of a completed resin tube showing a conventional example.
FIG. 9 is a partially cutaway longitudinal sectional view showing a conventional example and showing a filled state of a resin tube.
FIG. 10 shows a conventional example, and is a partially cutaway longitudinal sectional view of a device for heating a seal portion of a resin tube.
FIG. 11 is a partially cut-away longitudinal sectional view showing a conventional example and showing a clamped state of a resin tube.
FIG. 12 shows a conventional example, and is a partially cutaway longitudinal sectional view after heating a sealing portion of a resin tube.
FIG. 13 is a front view showing a conventional example, after a clamp seal of a resin tube.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Resin tube 9 Heating device for sealing part 14 Nozzle

Claims (1)

樹脂性チューブのクランプシール部となる端部内周部を熱風を噴出して加熱するノズルが設けられると共に、該ノズルの熱風供給通路に、該熱風の一部を取込んで渦巻流を発生させ、該渦巻流によって前記ノズルから噴出される熱風を吸引し排出するための渦巻流発生手段が設けられ、更に、該熱風を排気すべく前記樹脂性チューブのクランプシール部となる端部を遊嵌自在であり、且つ、前記ノズル、及び、前記渦巻流発生手段を所定間隔を有して囲包する排気外筒が設けられた樹脂製チューブのシール部加熱装置に於て、前記排気外筒、又は、該排気外筒と連通される排気通路内に前記熱風の排気量を調節する排気量調節手段を設け、該排気量調節手段によって前記樹脂性チューブのクランプシール部となる端部と、該端部を遊嵌する前記排気外筒間の隙間に於ける熱風の外部への漏出、又は、過度な外気の吸収を制限することを特徴とする樹脂性チューブのシール部加熱装置。A nozzle is provided for ejecting and heating hot air at an end portion inner peripheral portion serving as a clamp seal portion of the resin tube, and a part of the hot air is taken into a hot air supply passage of the nozzle to generate a spiral flow, A swirl flow generating means for sucking and discharging hot air ejected from the nozzle by the swirl flow is provided, and further, an end serving as a clamp seal portion of the resinous tube is freely fitted to exhaust the hot air. And the nozzle, and in a resin tube seal portion heating device provided with an exhaust outer cylinder surrounding the spiral flow generating means at a predetermined interval, the exhaust outer cylinder, or An exhaust path adjusting means for adjusting an exhaust amount of the hot air in an exhaust passage communicating with the exhaust outer cylinder; an end serving as a clamp seal portion of the resinous tube by the exhaust amount adjusting means; Before loose fitting Leakage to the outside of the in hot air in the gap between the exhaust outer cylinder, or, sealing portion heating device resinous tube and limits the absorption of excessive air.
JP2002129226A 2002-04-30 2002-04-30 Heating device for resin tube seal Expired - Fee Related JP3584245B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP2002129226A JP3584245B2 (en) 2002-04-30 2002-04-30 Heating device for resin tube seal

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JP3584245B2 true JP3584245B2 (en) 2004-11-04

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