JPH06331086A - 流体輸送管と分岐管の接続方法 - Google Patents

流体輸送管と分岐管の接続方法

Info

Publication number
JPH06331086A
JPH06331086A JP5117154A JP11715493A JPH06331086A JP H06331086 A JPH06331086 A JP H06331086A JP 5117154 A JP5117154 A JP 5117154A JP 11715493 A JP11715493 A JP 11715493A JP H06331086 A JPH06331086 A JP H06331086A
Authority
JP
Japan
Prior art keywords
branch
pipe
branch pipe
hole
diameter
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.)
Granted
Application number
JP5117154A
Other languages
English (en)
Other versions
JP2650083B2 (ja
Inventor
Sadao Nagase
貞雄 長瀬
Hisayoshi Ban
久良 伴
Masahide Ito
正秀 伊東
Masayoshi Kitagawa
眞好 喜多川
Ryoichi Nakano
良一 中野
Ichiro Shiomi
一郎 塩見
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.)
Kurimoto Ltd
Mitsubishi Chemical Corp
Original Assignee
Kurimoto Ltd
Mitsubishi Petrochemical 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 Kurimoto Ltd, Mitsubishi Petrochemical Co Ltd filed Critical Kurimoto Ltd
Priority to JP5117154A priority Critical patent/JP2650083B2/ja
Publication of JPH06331086A publication Critical patent/JPH06331086A/ja
Application granted granted Critical
Publication of JP2650083B2 publication Critical patent/JP2650083B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • 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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • 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
    • B29C66/70—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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/725—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 structure of the material of the parts to be joined being hollow-walled or honeycombs
    • B29C66/7252—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 structure of the material of the parts to be joined being hollow-walled or honeycombs hollow-walled
    • 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
    • B29C66/81—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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • 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
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/7394—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 thermoset
    • B29C66/73941—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 thermoset characterised by the materials of both parts being thermosets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • 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
    • B29L2023/18—Pleated or corrugated hoses
    • B29L2023/186—Pleated or corrugated hoses having a smooth internal wall

Landscapes

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

Abstract

(57)【要約】 【目的】 コルゲート管等の流体輸送管に設けた分岐孔
と分岐管の接合部の融着強度に偏りが発生しないように
する。 【構成】 熱可塑性樹脂製のコルゲート管１に設けた円
形状の分岐孔１ａに熱可塑性樹脂製の分岐管２を差し込
み、その分岐管２の前記分岐孔１ａとの接合部２ａにあ
らかじめ捲回しておいたニクムロ線に通電してコルゲー
ト管１と分岐管２を接続する際に、前記分岐管２の分岐
孔１ａとの接合部２ａの外径を、あらかじめ前記分岐孔
１ａの径より０．５〜５．０％大きくしておくととも
に、前記分岐管２の先端部２ｂをあらかじめ前記接合部
２ａから先端に向けて漸次細くし、かつ先端の外径を前
記分岐孔１ａの径より小さくしておく方法。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明は、下水，上水，ガス等
の流体の輸送に使用する熱可塑性樹脂製の流体輸送管
（コルゲート管，直管）の所要箇所に、熱可塑性樹脂製
の分岐管を加熱融着により一体に接続する、流体輸送管
と分岐管の接続方法に関するものである。
【０００２】
【従来の技術】従来の、この種の接続方法としては、特
公昭６２−１９６３１号公報に開示されているものがあ
る。
【０００３】この接続方法によれば、流体輸送管と分岐
管は次の手順で接続される。まず、図３に示すように、
接合部にニクロム線１３を捲回した分岐管１２を、流体
輸送管１１に形成した分岐孔１４に差し込んで、両管１
１，１２を最終の接続姿勢に保持する。次いで、そのま
まの状態でニクロム線１３に通電して両者１１，１２の
接合部位を同時に加熱軟化させる。そして、その直後
に、図４に示すように、拡径治具１５を分岐管１２に挿
入して押し込み、その傾斜拡径部１５ａにより分岐管１
２の接合部を拡径して分岐孔１４に分岐管１２の接合部
を融着する。
【０００４】
【発明が解決しようとする課題】しかし、上記接続方法
にあっては、拡径治具１５を使用しなければならない煩
わしさがあるだけでなく、拡径治具１５で分岐管１２の
接合部を拡径するとき、その径方向に均等に拡径しにく
いため、分岐孔１４と分岐管１２の接合部の融着強度に
偏りが発生しやすい等の難点があった。
【０００５】この発明は、このような従来の問題点を解
決するためになされたもので、拡径治具を使用しない
で、流体輸送管の分岐孔と分岐管の接合部の融着強度に
偏りが発生しにくい、流体輸送管と分岐管の接続方法を
提供することを目的とする。
【０００６】
【課題を解決するための手段】この発明が提供する流体
輸送管と分岐管の接続方法は、熱可塑性樹脂製の流体輸
送管に設けた円形状の分岐孔に熱可塑性樹脂製の分岐管
を差し込み、その分岐管の前記分岐孔との接合部にあら
かじめ捲回しておいた通電による加熱線に通電して流体
輸送管と分岐管を接続する際に、前記分岐管の分岐孔と
の接合部の外径を、あらかじめ前記分岐孔の径より０．
５〜５．０％大きくしておくとともに、前記分岐管の先
端部をあらかじめ前記接合部から先端に向けて漸次細く
し、かつ先端の外径を前記分岐孔の径より小さくしてお
くことを特徴とする流体輸送管と分岐管の接続方法であ
る。
【０００７】上記流体輸送管及び分岐管に使用する樹脂
としては、熱可塑性樹脂であるポリオレフィン系樹脂、
ポリ塩化ビニル樹脂等を挙げることができるが、低密
度、中密度または高密度のポリエチレンまたはポリプロ
ピレン等のポリオレフイン系樹脂が好ましい。
【０００８】分岐管に使用する樹脂は流体輸送管のそれ
と同じ系統の樹脂であることが融着強度と耐久性の面か
ら好ましい。
【０００９】通電による加熱線としては、例えば、ニク
ロム線や鉄線を挙げることができるが、流体輸送管及び
分岐管の樹脂を溶融、軟化させるまでに昇温可能なもの
であればよい。
【００１０】ポリエチレン樹脂の場合、加熱線の温度は
１００〜２２０℃位が適当である。
【００１１】分岐管の先端部を先端に向けて漸次細く
し、先端の外径を分岐孔の径以下としたのは、分岐管の
接合部外径が分岐孔の径より大きいので、分岐孔に円滑
に入りやすくするためである。加熱線は樹脂に被覆され
ているのが密着性の面から好ましいが、分岐管と一体成
型してその接合部の外表面付近に埋設するのが最も好ま
しい。このようにすると、分岐管を強制的に差し込むと
きに、加熱線が分岐管から剥離しないからである。この
ほか、加熱線は分岐管の接合部にあらかじめスパイラル
状に設けた溝に捲回するようにしてもよい。
【００１２】分岐管の接合部の外周面は、円筒面でよい
が、分岐孔を徐々に均等に押し広げるためには、先端部
側へ向かって徐々に外径を小さくしてテーパーをつける
のが好ましい。
【００１３】分岐管の接合部外径を分岐孔より０．５〜
５．０％大きくしたのは、０．５％未満であると、加熱
線に通電した場合、分岐管の接合部と分岐孔との間に溶
融し樹脂が充填されないで空隙を生じるか、または充填
されるとしても厚みが薄くなる個所ができやすくなり、
この個所に水圧などがかかると、ここから水が漏洩する
恐れがあるからである。また、５．０％を超えると、分
岐孔が拡径され過ぎて大きくめくれ、加熱線に通電した
場合、溶融した樹脂が分岐管の周囲に均等に充填されに
くくなり、空隙などの欠陥を生じやすいからである。
【００１４】分岐管には、流体輸送管への接続状態にお
いて、その外周面に当接するサドル部を設けるのが位置
決め、接続強度の面で好ましい。
【００１５】
【作用】この発明によれば、分岐管の先端の外径が分岐
孔の径より小さいので、分岐管はその先端部において分
岐孔に誘導され入りやすい。また、分岐管の接合部は分
岐孔の径より大きいので、誘導された分岐管を分岐孔に
圧入すると、分岐孔は分岐管の接合部によってその径方
向へ均等に押し広げられる。
【００１６】押し広げられた分岐孔は元の径に戻ろうと
し、そのときの復元力が分岐管の接合部に圧縮力として
その全周にわたってほぼ均一に作用する。
【００１７】この分岐孔の復元力が通電による接合部の
樹脂の溶融によって解き放たれると、分岐管の接合部の
外周部に溶融樹脂の肉盛りが一様に偏りなく発生する。
その結果、分岐管の接合部と分岐孔の口縁部の融着強度
が、接合部位全周にわたってほぼ均一になる。
【００１８】
【実施例】以下、この発明の実施例１，２を図によって
説明する。
【００１９】実施例１，２においては、流体輸送管とし
てコルゲート管を使用し、分岐管としては直管タイプの
ものを使用した。接続方法の説明の前に、まずこれらの
管について図１と図２により説明する。
【００２０】図において、１は高密度ポリエチレン（密
度０．９４５ｇ／cm3 ＭＦＲ０．７ｇ／１０ｍｉｎ）
製のコルゲート管で、この発明にいう流体輸送管であ
る。コルゲート管１には後述する分岐管２を接続するた
めの分岐孔１ａが設けてある。コルゲート管１の内径は
２５０mm、肉厚は２mmである。２はサドル部付の分岐管
であり、同じく高密度ポリエチレン（密度０．９５４ｇ
／cm3 ＭＦＲ５．０ｇ／１０ｍｉｎ）製で、外径は６
３mm、肉厚は５mmである。
【００２１】２ａは分岐管２の分岐孔１ａとの接合部
で、この接合部２ａの表面付近には加熱線であるニクロ
ム線３が埋設状態で捲回されている。ニクロム線３の直
径は０．７mm、延長線長さは２ｍで、２２mm幅で捲回さ
れている。上記分岐管２の分岐孔１ａとの接合部２ａ
は、実施例１，２では、コルゲート管１の円筒管ａと波
形管ｂの重合部１ｂに対応する部位である。ニロクム線
３はこの部位に埋設されている。
【００２２】２ｂは分岐管２の先端部で、上記接合部２
ａから先端に向けて細くなっており、先端の外径は５８
mmである。分岐管２のサドル部２ｃはニクロム線３に通
電して樹脂が溶融したときでも、分岐管２の位置決めを
する役目を果たす。分岐管２を分岐孔１ａに圧入してサ
ドル部２ｃがコルゲート管１に当接したとき、前記接合
部２ａはコルゲート管１の重合部１ｂと対向する位置に
くる。４は分岐管２とこれに接続する図外の接続管との
間をシールするゴム輪である。
【００２３】実施例１と実施例２においては、分岐管２
の接合部２ａの外径（Ａ）と分岐孔１ａの径（Ｂ）を、
それぞれ表１のように設定した。
【００２４】次に、コルゲート管１と分岐管２の接続
は、以下の手順で行った。
【００２５】（１）分岐管２の先端部２ｂをコルゲート
管１の分岐孔１ａに差し込んで、サドル部２ｃがコルゲ
ート管１に当接するまで圧入した。
【００２６】（２）ニクロム線３に１２Ｖの電圧で４分
間通電し、１時間ほど冷却して溶融樹脂を固化させた。
冷却後、密閉性を調べた。密閉性の試験は、管内に３．
５ｋｇ／cm2 の水圧を３分間保持したときの接合部にお
ける水の漏洩の有無によって調べた。結果は表１の通り
であった。
【００２７】表１から明らかなように、実施例１，２の
いずれの場合も、水の漏洩は認められなかった、なお、
比較のために、分岐管２の接合部２ａによる分岐孔１ａ
の拡径率を６％（比較例１）と０．３％（比較例２）に
したところ、水の漏洩が認められた。
【００２８】
【表１】
【００２９】
【発明の効果】以上説明したように、この発明によれ
ば、上述のように、加熱線を捲回した分岐管の接合部を
流体輸送管の分岐孔より若干太くし、分岐管を分岐孔に
圧入したときの分岐孔の復元力を利用するようにしたの
で、流体輸送管の分岐孔と分岐管の接合部の融着強度に
偏りが発生しにくい、という効果が得られる。
【図面の簡単な説明】
【図１】 実施例のコルゲート管と分岐管接続方法を説
明するための断面図
【図２】 図１のＡ−Ａ断面図
【図３】 従来の接続方法における分岐管接続前の断面
図
【図４】 従来の接続方法における分岐管接続状態の断
面図
【符号の説明】
１ コルゲート管（流体輸送管） １ａ 分岐孔 ２ 分岐管 ２ａ 接合部 ２ｂ 先端部 ３ ニクロム線（加熱線）
フロントページの続き (72)発明者 伊東 正秀 三重県四日市市東邦町１番地 三菱油化株 式会社四日市総合研究所内 (72)発明者 喜多川 眞好 大阪府大阪市西区北堀江１丁目12番19号 株式会社栗本鐵工所内 (72)発明者 中野 良一 大阪府大阪市西区北堀江１丁目12番19号 株式会社栗本鐵工所内 (72)発明者 塩見 一郎 大阪府大阪市西区北堀江１丁目12番19号 株式会社栗本鐵工所内

Claims (3)

    【特許請求の範囲】
  1. 【請求項１】 熱可塑性樹脂製の流体輸送管に設けた円
    形状の分岐孔に熱可塑性樹脂製の分岐管を差し込み、そ
    の分岐管の前記分岐孔との接合部にあらかじめ捲回して
    おいた通電による加熱線に通電して流体輸送管と分岐管
    を接続する際に、前記分岐管の分岐孔との接合部の外径
    を、あらかじめ前記分岐孔の径より０．５〜５．０％大
    きくしておくとともに、前記分岐管の先端部をあらかじ
    め前記接合部から先端に向けて漸次細くし、かつ先端の
    外径を前記分岐孔の径より小さくしておくことを特徴と
    する流体輸送管と分岐管の接続方法。
  2. 【請求項２】 前記分岐管がサドル部を有している請求
    項１記載の流体輸送管と分岐管の接続方法。
  3. 【請求項３】 前記流体輸送管と分岐管がポリオレフィ
    ン樹脂製である請求項１記載の流体輸送管と分岐管の接
    続方法。
JP5117154A 1993-05-19 1993-05-19 流体輸送管と分岐管の接続方法 Expired - Fee Related JP2650083B2 (ja)

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JPH06331086A true JPH06331086A (ja) 1994-11-29
JP2650083B2 JP2650083B2 (ja) 1997-09-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195238A3 (en) * 2000-10-06 2002-09-18 Uponor Innovation Ab A method for manufacturing a well, and a well

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195238A3 (en) * 2000-10-06 2002-09-18 Uponor Innovation Ab A method for manufacturing a well, and a well

Also Published As

Publication number Publication date
JP2650083B2 (ja) 1997-09-03

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