JPH03194294A - 溶着継手 - Google Patents

溶着継手

Info

Publication number
JPH03194294A
JPH03194294A JP1333487A JP33348789A JPH03194294A JP H03194294 A JPH03194294 A JP H03194294A JP 1333487 A JP1333487 A JP 1333487A JP 33348789 A JP33348789 A JP 33348789A JP H03194294 A JPH03194294 A JP H03194294A
Authority
JP
Japan
Prior art keywords
thermoplastic resin
pipe
centering
socket
joint
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
JP1333487A
Other languages
English (en)
Other versions
JPH0830552B2 (ja
Inventor
Kenji Mizukawa
賢司 水川
Jinichiro Nakamura
中村　仁一郎
Kuniaki Onishi
国昭 大西
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP1333487A priority Critical patent/JPH0830552B2/ja
Publication of JPH03194294A publication Critical patent/JPH03194294A/ja
Publication of JPH0830552B2 publication Critical patent/JPH0830552B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C66/12—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
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • 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
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • 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
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • 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
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • 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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • 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

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、熱可塑性樹脂製のガス管や水道管等の接合に
用いられる溶着継手に関する。
（従来の技術） 従来、熱可塑性樹脂管を接続するための溶着継手として
は、例えば、特開昭６１−６２６９６号公報に記載され
ているようなものが知られている。
この溶着継手は、熱可塑性樹脂により筒状に形成され、
両端部がそれぞれ熱可塑性樹脂管の端部を受ける受口部
となされるとともに、これら受口部の内周部に加熱要素
としての電熱線が埋め込まれたもので、この電熱線の両
端には端子が接続されている。このような継手により熱
可塑性樹脂管を接続するには、この溶着継手の両受口部
内に熱可塑性樹脂管を挿入し、前記端子間に電圧をかけ
て電熱線を発熱させる。そうすると、電熱線によって受
口部の内周部と熱可塑性樹脂管の外周部が溶融し、互い
に溶着する。
（発明が解決しようとする課題） しかしながら、このような従来の溶着継手にあっては、
溶着継手に熱可塑性樹脂管を挿入した際、その芯出しが
適正に行われていないと、受口部の内周面と熱可塑性樹
脂管の外周面との間のクリアランスが場所によって異な
り、このため、樹脂の溶融状態が不均一となって溶着不
良箇所が生じたリ、また、熱可塑性樹脂管の軸芯に対し
て溶着継手の軸芯が傾いてしまう等、不適切な状態で接
合が行われてしまうといった問題があった。
本発明は、上記従来のＩＪｉ題を解消すべくなされたも
ので、受口部内に熱可塑性樹脂管を挿入する際に同時に
芯出しが行える溶着継手を擢供することを目的とするも
のである。
（課題を解決するための手段） 上記目的を達成するため、本発明に係る溶着継手は、熱
可塑性樹脂により筒状に形成され、両端部がそれぞれ熱
可塑性樹脂管の端部を受ける受口部となされるとともに
、これら受口部の内周部に加熱要素が埋め込まれた溶着
継手において、前記両受口部の境界部分に、前記各熱可
塑性樹脂管の開口端部内周面と摺接する環状の芯出し部
が、その軸芯が該継手の軸芯と一致するように配設され
たものである。
（作用） 本発明の溶着継手の受口部に熱可塑性樹脂管を挿入して
いくと、両受口部の境界部分に達する直前で芯出し部が
管内に入り込み、管の開口端部内周面と芯出し部とが摺
接する。ここで、芯出し部は、その軸芯が継手の軸芯と
一致するように設けられでいるから、管は芯出し部によ
って自然に適正な姿勢となる位置に案内され、これによ
って管の芯出しが行われる。
上述のようにして溶着継手と熱可塑性樹脂管とが芯出し
された状態となると、受口部の内周面と熱可塑性樹脂管
の外周面との間のクリアランスが一定となるので、この
後、通電により加熱要素を発熱させれば、受口部の内周
部と熱可塑性樹脂管の外周部とが均一に溶融し、互いに
良好な状態で溶着される。
（実施例） 以下、本発明の一実施例を、図面を参照して説明する。
第１図は本発明に係る溶着継手を示す断面図、第２図は
同正面図である。
本発明に係る溶着継手１は、例えばポリエチレンなどの
熱可塑性樹脂を素材として射出成形により筒状に形成さ
れたものである。
この溶着継手１０両端部は、それぞれ熱可塑性樹脂管Ｐ
の端部を受ける受口部２．３となされており、これら受
口部２．３の内周部には加熱要素４が埋め込まれている
。
また、各受口部２．３の外周面には、ボス６゜６がそれ
ぞれ突設されており、これらポス６．６の内部に、前記
加熱要素４と接続される端子７゜７が配設されている。
前記受口部２．３の境界部分には、各熱可塑性樹脂管Ｐ
の開口端部内周面と摺接する環状の芯出し部５が、その
軸芯が該継手１の軸芯と一致するように配設されている
。
この芯出し部５は、熱可塑性樹脂管Ｐを所定位置で挿入
規制するための衝合部５１と、衝合部５１の内周側両端
から継手１の軸芯に沿ってそれぞれ延出された摺接部５
２，５２とから構成され、継手１と一体的に成形されて
いる。このようになる芯出し部５の摺接部５２，５２の
外径Ｄ１．（第２図参照）は、熱可塑性樹脂管Ｐの内径
Ｄ２（第１図参照）と略同じ寸法とされており、具体的
にはその差（Ｄ２−Ｄ］、）が約０，５鶴以下となるよ
うにするのが好ましい。
なお、摺接部５２，５２は、図示例では周方向に４箇所
にわたって９０’間隔で設けられているが、これに限ら
ず、周方向に３箇所にわたって１２０゜間隔で設けられ
ていてもよく、あるいは５箇所以上もしくは全周にわた
って連続するように設けられていてもよい。
また、摺接部５２は、図示例ではその内面（軸芯側の面
）と外面（管Ｐと接する面）とが平行になされているが
、例えば、第３図に示すように、外面がテーバ面に形成
されていてもよい。このように摺接部５２の外面がテー
バ面に形成されていると、管Ｐ内に摺接部５２，５２を
スムーズに入り込ませることができるとともに、管Ｐの
成形上の寸法誤差と芯出し部５における成形上の寸法誤
差とを吸収することができ、そのような寸法誤差に起因
する両者間の不整合を防ぐことができる。
さらに、摺接部５２は図示例のような短冊状に限らず、
図示はしないが円板状であってもよい。
また、芯出し部５は、必ずしも継手】と一体的に設けら
れている必要はなく、継手１とは別体に形成され、継手
１の内部に挿入されるようになされたものであってもよ
い。第４図はその一例を示す正面図、第５図は第４図に
おけるＶ−Ｖ線断面図である。この例の芯出し部５は、
摺接部５２゜５２が全周にわたって連続して設けられて
おり、その外周面の幅方向中央部に複数個（図では８個
）の脚部５３・・・が突設されたものである。これら脚
部５３・・・の長さは、その端面が受口部２．３の境界
部分の内周面と接するような寸法とされる。また、該境
界部分に管の挿入長さを規制するための音溝接部が突設
されている場合には、上記端面が該音溝接部の内周面と
接するような寸法とされる。
前記加熱要素４としては、例えば、多数の細い長尺状電
熱線（炭素繊維、ニクロム線等）が束ねられた加熱抵抗
線であってもよいし、また、長さが１０〜２００　＋ｎ
のニクロム線や炭素繊維等の電熱性繊維がシー　ト状に
抄造されたものであってもよい。このようになる加熱要
素（１木の例えばニクロム線等の電熱線）４は、継手１
の軸芯を中心として螺旋状に埋設されており、前記芯出
し部５を境として、一方の熱可塑性樹脂管との溶着用と
なる第１群４１と、他方の熱可塑性樹脂管との溶着用と
なる第２群４２とに分けて配設されている。
次に、上記溶着継手１による熱可塑性樹脂管Ｐの接合手
順について説明する。
まず、本発明の溶着継手１の受口部２．３に熱可塑性樹
脂管Ｐ、Ｐをそれぞれ挿入する。すると、管Ｐ、Ｐが両
受口部２．３の境界部分に達する直前で芯出し部５の摺
接部５２．５２が管Ｐ、　　Ｐ内にそれぞれ入り込み、
管Ｐ、Ｐの開口端部内周面と芯出し部の摺接部５２，５
２とが摺接する。ここで、芯出し部５は、その軸芯が継
手１の軸芯と一致するように設けられているから、管Ｐ
、Ｐは芯出し部５によって自然に適正な姿勢となる位置
に案内され、これによって管Ｐ、Ｐの芯出しが行われる
。また、熱可塑性樹脂管Ｐが、例えばポリエチレン管の
場合、溶着に先立って管外周面の酸化被膜を切削除去す
るだめのスクレーパ処理が施され、管の外周面形状が第
６図に示す状態から第７図に示すような歪んだ形状にな
ってしまうが、そのような場合でも、上記芯出しは芯出
し部５の摺接部５２，５２と管Ｐの開口端部内周面との
摺接によって行われるため、芯出しが上記したような形
状の変化に左右されることはない。
上述のようにして溶着継手１と熱可塑性樹脂管Ｐ、Ｐと
が芯出しされた状態に位置決め固定されると、受口部２
．３の内周面と熱可塑性樹脂管の外周面との間のクリア
ランスが一定となるので、この後、端子７，７に電源装
置（図示せず）のコネクタを接続して通電を行い、加熱
要素４を発熱させれば、受口部２，３の内周部と熱可塑
性樹脂管Ｐ、Ｐの外周部とが均一に溶融し、互いに良好
な状態で溶着される。
（発明の効果） 以」二説明したように、本発明の溶着継手は、受口部の
境界部分に芯出し部が配設されているので、受口部内に
熱可塑性樹脂管を挿入するだけで管の芯出しを行うこと
ができる。したがって、従来のような位置決め用の治具
を用いるといった面倒な手間を省くことができるととも
に、管の外周面と受口部の内周面との間に一定のクリア
ランスを確保して適正な状態で溶着することができると
いった効果を奏する。
【図面の簡単な説明】
第１図は発明に係る溶着継手の一実施例を示す断面図、
第２図は同正面図、第３図は芯出し部の他の実施例を示
す部分拡大断面図、第４図は芯出し部のさらに他の実施
例を示す正面図、第５図は第４図におけるＶ−Ｖ線断面
図、第６図及び第７図はポリエチレン管におけるスクレ
ーパ処理による外周面形状の変化を説明するための正面
図である。 １・・・溶着継手　　　　２，３・・・受口部４・・・
加熱要素　　　　５・・・芯出し部Ｐ・・・熱可塑性樹
脂管

Claims (1)

  1. 【特許請求の範囲】 １）熱可塑性樹脂により筒状に形成され、両端部がそれ
    ぞれ熱可塑性樹脂管の端部を受ける受口部となされると
    ともに、これら受口部の内周部に加熱要素が埋め込まれ
    た溶着継手において、 前記両受口部の境界部分に、前記各熱可塑 性樹脂管の開口端部内周面と摺接する環状の芯出し部が
    、その軸芯が該継手の軸芯と一致するように配設された
    ことを特徴とする溶着継手。
JP1333487A 1989-12-22 1989-12-22 溶着継手 Expired - Lifetime JPH0830552B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1333487A JPH0830552B2 (ja) 1989-12-22 1989-12-22 溶着継手

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1333487A JPH0830552B2 (ja) 1989-12-22 1989-12-22 溶着継手

Publications (2)

Publication Number Publication Date
JPH03194294A true JPH03194294A (ja) 1991-08-23
JPH0830552B2 JPH0830552B2 (ja) 1996-03-27

Family

ID=18266613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1333487A Expired - Lifetime JPH0830552B2 (ja) 1989-12-22 1989-12-22 溶着継手

Country Status (1)

Country Link
JP (1) JPH0830552B2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002106778A (ja) * 2000-10-04 2002-04-10 Hitachi Metals Ltd 樹脂管接続用継手

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6154994A (ja) * 1984-08-28 1986-03-19 セーラー万年筆株式会社 無方向ペン体の製造方法
JPS63185989U (ja) * 1987-05-21 1988-11-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6154994A (ja) * 1984-08-28 1986-03-19 セーラー万年筆株式会社 無方向ペン体の製造方法
JPS63185989U (ja) * 1987-05-21 1988-11-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002106778A (ja) * 2000-10-04 2002-04-10 Hitachi Metals Ltd 樹脂管接続用継手
JP4484186B2 (ja) * 2000-10-04 2010-06-16 日立金属株式会社 樹脂管接続用継手

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