JP2721448B2 - 電気融着式管継手及びその製法 - Google Patents

電気融着式管継手及びその製法

Info

Publication number
JP2721448B2
JP2721448B2 JP3316361A JP31636191A JP2721448B2 JP 2721448 B2 JP2721448 B2 JP 2721448B2 JP 3316361 A JP3316361 A JP 3316361A JP 31636191 A JP31636191 A JP 31636191A JP 2721448 B2 JP2721448 B2 JP 2721448B2
Authority
JP
Japan
Prior art keywords
joint
pipe joint
electric heater
sleeve
sleeve tube
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.)
Expired - Fee Related
Application number
JP3316361A
Other languages
English (en)
Other versions
JPH05256391A (ja
Inventor
孝 穴水
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.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18076247&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2721448(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP3316361A priority Critical patent/JP2721448B2/ja
Publication of JPH05256391A publication Critical patent/JPH05256391A/ja
Application granted granted Critical
Publication of JP2721448B2 publication Critical patent/JP2721448B2/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
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/008—T-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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C65/02—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
    • B29C65/3432—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 comprising several wires, e.g. in the form of several independent 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
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C66/01—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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
    • 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
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-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
    • B29C66/5224—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
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • 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
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • B29L2031/246—T-joints

Landscapes

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

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明はプラスチック管（以下
「管」という）を接続する際に用いられる電気融着式管
継手（以下「ＥＦ管継手」という）に関する。
【０００２】
【従来の技術】ＥＦ管継手（ソケット）１は図１１に示
すように管２を接続すべき接続口３内に電気ヒーター線
４を内蔵させ、この電気ヒーター線４にコントローラー
５から端子６を介して電圧を印加することにより、電気
ヒーター線４を発熱させ、この熱で管継手１の内面と管
２の外面とを溶融して融着接合させるという接続方式を
採るものである。
【０００３】図１２はＴ字型ＥＦ管継手の例であるが、
このＴ字型の場合には分岐口７側には電気ヒーター線４
の内臓がなく、この方はソケット型のＥＦ管継手１を別
に用意し、これで接続する方式である。
【０００４】図１３はＴ字型管継手の別の接続法（スピ
ゴット継手方式）で、三方の接続口をすべてソケット型
ＥＦ管継手１を用いて接続する方式である。
【０００５】図１４はエルボ型管継手であって、この場
合もソケット型ＥＦ管継手１を用いて接続する方式（ス
ピゴット継手方式）の例である。
【０００６】図１５はエルボ型のＥＦ管継手の製造法を
示し、先ず（Ａ）に示すようにインナーと称される内管
８を成型し、次に（Ｂ）に示すようにこの内管８に所要
の電気ヒーター線４を捲きつけ、次に（Ｃ）に示すよう
にこの外にアウターと称される外管９を成形して製品と
するもので、金型は内管８側と外管９側の２組が必要で
ある。なお、この製法は、ＥＦ管継手としてのＴ字型、
ソケット型、レジューサー型、キャップ型のすべてにお
いて同一である。
【０００７】
【発明が解決しようとする課題】しかし、上記従来の管
継手及びその製法においては次のような欠点がある。
【０００８】ａ．図１５で説明したように、インナーを
成形した後その外側にアウターを成形するため、この金
型は一品種について２種類を必要とし、又大口径の場合
には大容量の射出成形機を必要として、製造に時間とコ
ストがかかり、多額の設備投資が必要となる。
【０００９】ｂ．図１３及び図１４で説明したようにす
べてをソケット型ＥＦ管継手１で融着接合する場合（ス
ピゴット管継手方式）には、通電回数が増えて作業時間
が長くなる。
【００１０】本発明の目的は、製造が簡単で施工に時間
がかからない電気融着式管継手とその製法を提供するこ
とである。
【００１１】
【課題を解決するための手段】本発明の構成は次のとお
りである。
【００１２】１．袖管付の継手において、継手本体部分
と電気ヒーター線を内蔵した袖管部分とを分離して成形
し、あとで継手本体の袖管口と袖管との接合部を電気ヒ
ーターにより加熱して溶融させたのち、速やかに圧着し
て一体に接合する電気融着式管継手の製法。
【００１３】２．継手本体に電気ヒーター線を内蔵した
袖管を融着接合して成る電気融着式管継手。
【００１４】なお、継手本体と袖管との接合部は突き合
わせて接合させるようにしてもよいし、一方を他方に嵌
合して接合させるようにしてもよい。又、この嵌合を行
う場合に、袖管側の嵌入部に電気ヒーター線を内蔵させ
ておき、電気ヒーターを使わず、この電気ヒーター線の
発熱で継手本体の接合口内に袖管を融着接合させるよう
にしてもよい。
【００１５】
【作用】継手本体側は射出成形により一度に成形され、
袖管側のみがインナーを成形した後これに電気ヒータ線
を捲きつけてから外側にアウターを成形する。別々に成
形された継手本体と袖管は、その接合部を電気ヒーター
により溶融され、この状態で速やかに圧着されることに
より融着し、製品となる。
【００１６】管継手は、現場において袖管の接続口に配
管が嵌入され、コントローラーで電気ヒーター線に電圧
が印加されると、この電気ヒーター線が発熱し、この熱
で袖管の接続口内と管の外表面が融着する。
【００１７】
【実施例】図１において、２０はＴ字型の管継手にし
て、この管継手２０は両側に袖管の接合口２１を形成
し、分岐側にも接合口２１を形成し、射出成形されたも
のである。２４は接合口２１に接合される袖管にして、
この袖管２４は接続口２５内に電気ヒーター線２６を内
蔵し、外の一部に電極（端子）２７を露出させた構造
で、公知のインナー成形とアウター成形により一体に組
み合わせられたものである。この袖管２４は図２に示す
ように電気ヒーター２８を用いて加熱溶融後、速やかに
圧着される。
【００１８】図３はエルボ型管継手２９に本発明を実施
した実施例を示し、図４はレジューサー型管継手３０に
本発明を実施した実施例を示し、図５はキャップ型管継
手３１に本発明を実施した実施例を示すものである。
【００１９】図６は継手本体２０の接合口２１内に袖管
２４の嵌合部２４′を嵌入することにより接合させた実
施例、図７はエルボ型管継手２９、図８はレジューサー
型管継手３０、図９はキャップ型管継手３１に嵌合部２
４′を嵌入して融着させた実施例である。
【００２０】図１０はエルボ型管継手２９に対して嵌合
部２４′付袖管２４を融着する場合の説明図である。先
ず、（Ａ）から（Ｂ）に示すように、電気ヒーター３２
は凸部３３と凹部３４を有し、凹部３４には袖管２４の
嵌合部２４′を挿入し、凸部３３をエルボ型管継手２９
の接合口２１内に挿入し、同時に加熱したのち、溶融し
たところで（Ｃ）に示すように嵌合して融着させる。
【００２１】
【発明の効果】本発明は継手本体と袖管を別々に構成
し、あとで両者を結合させることによりＥＦ管継手を製
造するため、次の如き効果を奏する。
【００２２】ａ．インナー（内管）とアウター（外管）
に別けて成形するのは袖管部分だけとなり、製造が簡単
で、口径が同じ場合にはソケット型、Ｔ字型、エルボ
型、レジューサー型、キャップ型等すべて共通で袖管を
製造し、夫々に結合できるので、金型は小型で種類は少
なくて済み、製造コストが非常に安くなり、設備コスト
もかからない。
【００２３】ｂ．従来のスピゴット継手方式（図１３、
１４）に比べ融着時間は半分になる。
【図面の簡単な説明】
【図１】本発明をＴ字型管継手に適用した実施例図。
【図２】継手本体に袖管を突き合わせて融着する方法の
説明図。
【図３】本発明をエルボ型管継手に適用した実施例図。
【図４】本発明をレジューサー型管継手に適用した実施
例図。
【図５】本発明をキャップ型管継手に適用した実施例
図。
【図６】袖管を継手本体の接合口内に嵌合させた状態の
実施例の説明図。
【図７】袖管をエルボ型管継手の接合口内に嵌合させた
状態の実施例の説明図。
【図８】袖管をレジューサー型管継手の接合口内に嵌合
させた状態の実施例の説明図。
【図９】キャップ型管継手内に袖管の嵌合部を嵌合した
状態の実施例の説明図。
【図１０】電気ヒータを用いて継手と袖管を加熱する直
前の説明図。
【図１１】継手と袖管を加熱している状態の説明図。
【図１２】継手と袖管を嵌合した状態の説明図。
【図１３】従来のソケット型ＥＦ管継手と管との融着法
の説明図。
【図１４】従来のＴ字型ＥＦ管継手の説明図。
【図１５】Ｔ字型管継手にソケット型ＥＦ管継手を利用
して管を接続した状態の説明図。
【図１６】エルボ型管継手にソケット型ＥＦ管継手を利
用して管を接続した状態の説明図。
【図１７】従来のエルボ型ＥＦ管継手の製造方法であっ
て、インナーの説明図。
【図１８】従来のエルボ型ＥＦ管継手の製造方法であっ
て、インナーにヒータ線を捲きつけた状態の説明図。
【図１９】従来のエルボ型ＥＦ管継手の製造方法であっ
て、アウターを外装した状態の説明図。
【符号の説明】
２０ 継手本体 ２１ 接合口 ２４ 袖管 ２４′嵌合部 ２５ 接続口 ２６ 電気ヒーター線 ２７ 電極 ２８ 電気ヒーター ２９ エルボ ３０ レジューサー ３１ キャップ ３２ 電気ヒーター

Claims (5)

    (57)【特許請求の範囲】
  1. 【請求項１】 袖管付の継手において、継手本体部分と
    電気ヒーター線を内蔵した袖管部分とを分離して成形
    し、あとで継手本体の袖管口と袖管との接合部を電気ヒ
    ーターにより加熱して溶融させたのち、速やかに圧着し
    て一体に接合する電気融着式管継手の製法。
  2. 【請求項２】 継手本体の袖管口に対して袖管側の一部
    を突き合わせて融着接合する請求項１記載の電気融着式
    管継手の製法。
  3. 【請求項３】 継手本体の袖管口に対して袖管側の一部
    を嵌合させて融着接合する請求項１記載の電気融着式管
    継手の製法。
  4. 【請求項４】 継手本体に電気ヒーター線を内蔵した袖
    管を突き合わせて融着接合して成る電気融着式管継手。
  5. 【請求項５】 継手本体と電気ヒーター線を内蔵した袖
    管を嵌合させて融着接合して成る電気融着式管継手。
JP3316361A 1991-11-29 1991-11-29 電気融着式管継手及びその製法 Expired - Fee Related JP2721448B2 (ja)

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JP2721448B2 true JP2721448B2 (ja) 1998-03-04

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GB2421553A (en) * 2004-12-23 2006-06-28 Uponor Innovation Ab Tapping tee assembly with an integrated cutter and dual electrofusion elements
JPWO2017056203A1 (ja) 2015-09-29 2018-07-12 ミライアル株式会社 樹脂製管継手
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JP7323359B2 (ja) * 2019-07-03 2023-08-08 積水化学工業株式会社 袖管付継手及び配管システム
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009138794A (ja) * 2007-12-04 2009-06-25 Mitsui Chemicals Inc 分岐継手
TWI603023B (zh) * 2011-02-15 2017-10-21 喬治費雪導管系統股份有限公司 模組化接頭及製造此接頭的方法

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