JPH0211997A - 熱可塑性合成樹脂製管の融着接合構造及び融着接合方法 - Google Patents

熱可塑性合成樹脂製管の融着接合構造及び融着接合方法

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Publication number
JPH0211997A
JPH0211997A JP63161224A JP16122488A JPH0211997A JP H0211997 A JPH0211997 A JP H0211997A JP 63161224 A JP63161224 A JP 63161224A JP 16122488 A JP16122488 A JP 16122488A JP H0211997 A JPH0211997 A JP H0211997A
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JP
Japan
Prior art keywords
pipe
tube
synthetic resin
heating coil
thermoplastic synthetic
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Granted
Application number
JP63161224A
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English (en)
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JP2592914B2 (ja
Inventor
Saburo Kadowaki
三郎 門脇
Tamao Shoji
庄司　玉男
Masao Kimura
雅夫 木村
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Kubota Corp
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Kubota Corp
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Classifications

    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/01—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • 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
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8227—Transmission mechanisms using springs
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29L2023/22—Tubes or pipes, i.e. rigid

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は熱可塑性合成樹脂製管の突き合わせ融着接合（
以下バット接合ともいう）に関し、詳細には接合継手部
分が正確に芯出しく接合する管の軸芯が合致することを
いう）され、且つ接合部が平滑に形成される融着接合構
造であり、さらに該構造からなる継手を簡単な作業によ
って安定して形成することのできる融着接合方法に関す
るものである。
［従来の技術］ ポリブテン樹脂管や塩化ビニル樹脂管等の熱可塑性合成
樹脂製管（以下単に管という）をバット接合するに際し
ては、該管の端面を軟化溶融させる為の加熱装置が使わ
れている。該加熱装置はセラミックス製加熱板の間に電
熱コイルを埋設し、該加熱板の表面に管の端面を当接し
て該管端面を軟化溶融する装置である。尚該加熱板は向
かい合う２つの管の間に介挿され、同時に２つの端面を
溶融することができる様に構成され、さらに該加熱板の
表面はテフロン樹脂加工が施されて溶融した樹脂の付着
を防止できる様に工夫されている。
前記加熱装置によるバット接合方法においては、まず管
の端面同士を向かい合せて配置し、両管端面の間に前記
加熱装置を挟み込む。そして電熱コイルに通電して管端
面を軟化溶融し、軟化溶融されたところで上記加熱装置
を取り去り、両管端面同士を突き合わせて当接し、管同
士を押圧しつつ該溶融部分が冷却硬化するのを待つ。硬
化が完了したところで押圧力を解除し、バット接合作業
を完了する。
［発明が解決しようとする課題］ 上記のバット接合方法において第１の大きな問題として
は、管の芯出しが正確に行なえないということが挙げら
れる。即ち溶融させた管端同士を押圧しながら突き合わ
せる作業は作業者の手作業によって行なわれるのが一般
的であり、管の芯出しは作業者の勘に頼ることになり、
また押圧させている間に少しずつ接合面で折り曲がりは
じめ、折り曲がった状態で固着が完了することもあり、
安定した正確な芯出しは困難と考えられる。尚５０ｍｍ
す程度までの小口径管では芯出し用の治具が使用される
こともあるが、５０ｍｍす以上の大口径管の融着接合に
おいては、治具自体が大きくなるため、上記の手作業に
よることがほとんどである。
また管同士を押圧する力も作業の度毎に変化するため、
融着接合状態が不均一であり、融着接合が不完全となっ
たり、或は押圧力が強すぎたために溶融樹脂が管の内外
へ多量にあふれ出すこともある。管の外周側にあふれ出
た溶融樹脂は後に研削して取り除くことができるが、管
の内周側にはみ出たものは取り除くことが困難であり、
内部流体の流通障害物を残した状態のままとなってしま
う。
さらに第２の問題として加熱装置による管端溶融にばら
つきが生じる点がある。該加熱装置の発熱温度はサーモ
スタット等を使って一定に保つ様に構成されているが、
管端部の溶融状態の把握は作業者に頼っているため、溶
融が不十分な場合には融着不良を引き起こし、また溶融
が過剰な場合には前述のあふれ出しが多くなるという不
都合があった。上記２つの問題を含む融着接合方法によ
り形成された融着接合構造においては、上述の如く芯出
しが不正確であったり、或は接合不良や多量の樹脂はみ
出し等が生じることとなっていた。
そこで本発明者らは、芯出しが正確に行なわれ、且つ接
合部内外面が平滑である様な融着接合構造を提供すると
共に、またバット接合作業を簡単且つ安定して行なうこ
とのできる融着接合方法を提供する目的で種々研究を重
ね、本発明を完成した。
［課題を解決するための手段］ 上記の目的を達成し得た本発明の融着接合構造は、加熱
コイルを埋設した熱可塑性合成樹脂環体が管の端面間に
介設されると共に、該環体の介設部を含む管内面側には
非熱軟化性筒体が添挿されてなることを要旨とするもの
である。
さらに本発明の融着接合方法は、管端の外周に着脱自在
なフランジ付接合治具を夫々取付け、多管の端面間には
加熱コイルを埋設した熱可塑性合成樹脂環体を挟持する
と共に、該環体を含む管内面側に非熱軟化性筒体を添挿
し、さらに上記フランジ同士を締結具によって近接方向
に締付け、前記加熱コイルに通電して前記環体及び両管
端面を融着することを要旨とするものである。
［作用及び実施例］ 第１図は本発明の融着接合方法における接合直前状態を
示す断面説明図、第２図は第１図のＩＩ　−■線断面矢
視図、第３図は融着接合後の接合構造を示す断面説明図
である。以下融着接合方法を順を追って説明する。
■まず管１の端部外側に半割形状のフランジ付接合治具
１０を組み付ける。第４図は該接合治具１０の１つ（第
１図の左下部の接１合治具に相当する）を示す斜視説明
図であり、該接合治具１０は座部１２及びフランジ部１
７が一体的に形成され、座部１２には螺旋孔１３が形成
されると共に、フランジ部１７にも螺旋孔１４が形成さ
れる。またフランジ部１７の内周壁には周方向に連続す
る凹凸溝１１が形成され、管１を２つの接合治具１０，
１０によって挟持したとき、管軸方向に滑らない様に構
成される。即ち第２図に示す如く管１は上下２つの接合
治具１０．１０をボルト１８．１８によって接合して把
持される。
■次いで一方の管１の内部に円筒状の筒体５の一方端を
嵌挿し、ざらに該筒体５の外側に第５図に示す環体２を
挿入し、そして残るもう一方の管１を筒体５の他端に嵌
挿する。筒体５はステンレス鋼や熱硬化性樹脂等、高耐
食性を有するのは勿論、３００℃前後の加熱に対しても
溶融しない材料によって形成され、且つ肉厚が薄くても
高強度を発揮し得るものが用いられる。該筒体５の外径
は管１の内径とほぼ同一に形成され、筒体５を嵌挿した
とき、対面する管１．１は正確に芯出しされる。
また環体２は管１と同材料又は管１との接着融合性の高
い熱可塑性合成樹脂材４によって、中心孔を設けた円板
状に成形され、その内部には渦巻状の加熱コイル３が埋
設される。該加熱コイル３の両端はリード線３ａとして
環体２外へ延設され、該リード線３ａの端部には接続タ
ーミナル３ｂが設けられる。尚該加熱コイル３及びリー
ド線３ａは短絡防止のため熱硬化性樹脂によって被覆さ
れる。
■この状態で接合治具１０同士の周方向角度を合わせ、
抑圧スプリング１６を嵌入したボルト１５を一方のフラ
ンジ部１７に貫通すると共に、もう一方におけるフラン
ジ部１７の螺旋孔１４に螺合される。即ち第１図の例に
おいて左側に示す接続治具１０Ｌには螺旋孔１４が形成
され、右側の接続治具１０Ｒは単にボルト１５貫通孔が
設けられているだけであり、接続治具１０Ｌ、ＩＯＲは
前記押圧スプリング１６によって互いに近接する方向に
付勢される。
■そして接続ターミナル３ｂ、３ｂを電源に接続し、環
体２を加熱しくポリブテン樹脂製管及びポリブテン樹脂
製環体を使ったときには約２７０℃まで加熱する）、熱
可塑性樹脂材４及び端面Ｉａ、ｌａを溶融し、その後加
熱コイル３への通電を中止し、溶融部分が硬化したとこ
ろで接合を完了する。前記溶融が開始されると管１，１
同士は近接する方向に若干８動するが、この８動は周方
向に均一であり、管１，１の軸芯同士がずれることはな
い。なぜなら管は接合治具１０Ｌ。
１０Ｒに把持され、かつ該接合治具はボルト１５によっ
て周方向の動きが規制されているからである。
■融着接合が完了した後、接合治具１０を取り外すと第
３図に示す融着接合構造が完成される。
この構造においては管１．１の接合部内側には筒体５が
残されるので筒体５はできる限り薄い物が良い。尚この
筒体は環体２の溶融によって環体２に付着するので、管
１内を８動することはない。
一方環の内側は樹脂のはみ出し痕６はまったく形成され
ず、平滑な流体通路が確保できる。尚前記加熱コイルは
樹脂内に埋没したままであっても不都合はなく、リード
線３ａは図の如く切断してしまう。
上記の■〜■の順序で行なわれる融着接合方法において
は、管同士の押圧及び芯出しが機械的に行なわれるので
、押圧力の不拘−及び芯出しの狂いは極力抑制される。
また上記接合方法は直管同士の接合に限られず、直管と
曲管、曲管と曲管であっても適用でき、また接合姿勢も
区側の水平方向だけに限られず、垂直方向や斜め方向の
姿勢でも可能である。
［発明の効果］ 本発明の融着接合構造は、正確に芯出しされ、且つ管接
合部の周面は平滑に仕上げられる。
また本発明の融着接合方法は、簡単であるにもかかわら
ずバット接合作業が安定して行なわれる様になり、上記
構造の継手を少ない不良品発生率で形成することができ
る。
【図面の簡単な説明】
第１図は本発明方法の一工程状態を示す断面説明図、第
２図は第１図のＩＩ　−ＩＩ線断面矢視図、第３図は融
着接合構造を示す断面説明図、第４図は接合治具の実施
例を示す斜視説明図、第５図は環体２の実施例を示す斜
視説明図である。 １・・・熱可塑性合成樹脂製管 ２・・・環体 ３・・・加熱コイル　　　４・・・熱可塑性合成樹脂材
５・・・筒体　　　　　　６・・・はみ出し痕１０・・
・接合治具　　　　１１・・・凹凸溝１２・・・座部　
　　　　　１３．１４・・・螺旋孔１５．１８・・・ボ
ルト　　　１６・・・押圧スプリング１７・・・フラン
ジ部 味

Claims (2)

    【特許請求の範囲】
  1. （１）熱可塑性合成樹脂製管の対面する管端同士の融着
    接合構造であって、前記管の端面間には加熱コイルを埋
    設した熱可塑性合成樹脂環体が介設されると共に、該環
    体の介設部を含む管内面側には非熱軟化性筒体が添挿さ
    れてなることを特徴とする熱可塑性合成樹脂製管の融着
    接合構造。
  2. （２）熱可塑性合成樹脂製管の管端同士を融着接合する
    方法において、前記管端の外周に着脱自在なフランジ付
    接合治具を夫々取付け、上記各管の端面間には加熱コイ
    ルを埋設した熱可塑性合成樹脂環体を挟持すると共に、
    該環体を含む管内面側に非熱軟化性筒体を添挿し、さら
    に上記フランジ同士を締結具によって近接方向に締付け
    、前記加熱コイルに通電して前記環体及び両管端面を融
    着することを特徴とする熱可塑性合成樹脂製管の融着接
    合方法。
JP63161224A 1988-06-29 1988-06-29 熱可塑性合成樹脂製管の融着接合構造及び融着接合方法 Expired - Lifetime JP2592914B2 (ja)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0571591U (ja) * 1992-02-28 1993-09-28 三菱樹脂株式会社 電熱線を内蔵した管継手
US5494318A (en) * 1993-04-29 1996-02-27 Butts; Nicholas E. Secondary containment system
WO2000017547A2 (en) * 1998-09-21 2000-03-30 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration (Nasa) Gasket assembly
JP2011158007A (ja) * 2010-01-29 2011-08-18 Inoac Housing & Construction Materials Co Ltd 樹脂管の熱融着具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294291A (ja) * 1986-03-12 1986-12-25 矢野技研株式会社 流体輸送管への分岐管接合方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294291A (ja) * 1986-03-12 1986-12-25 矢野技研株式会社 流体輸送管への分岐管接合方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0571591U (ja) * 1992-02-28 1993-09-28 三菱樹脂株式会社 電熱線を内蔵した管継手
US5494318A (en) * 1993-04-29 1996-02-27 Butts; Nicholas E. Secondary containment system
WO2000017547A2 (en) * 1998-09-21 2000-03-30 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration (Nasa) Gasket assembly
WO2000017547A3 (en) * 1998-09-21 2000-08-24 Nasa Gasket assembly
JP2011158007A (ja) * 2010-01-29 2011-08-18 Inoac Housing & Construction Materials Co Ltd 樹脂管の熱融着具

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