JP2002257284A - Electrically fusing joint - Google Patents

Electrically fusing joint

Info

Publication number
JP2002257284A
JP2002257284A JP2001052347A JP2001052347A JP2002257284A JP 2002257284 A JP2002257284 A JP 2002257284A JP 2001052347 A JP2001052347 A JP 2001052347A JP 2001052347 A JP2001052347 A JP 2001052347A JP 2002257284 A JP2002257284 A JP 2002257284A
Authority
JP
Japan
Prior art keywords
heating wire
fusion
joint
electric heating
parts
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.)
Pending
Application number
JP2001052347A
Other languages
Japanese (ja)
Inventor
Masaya Iwasaki
雅也 岩崎
Hiroaki Tanaka
宏明 田中
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.)
Mitsui Chemicals Inc
Original Assignee
Mitsui Chemicals Inc
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 Mitsui Chemicals Inc filed Critical Mitsui Chemicals Inc
Priority to JP2001052347A priority Critical patent/JP2002257284A/en
Publication of JP2002257284A publication Critical patent/JP2002257284A/en
Pending 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
    • 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
    • B29C65/02—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"
    • B29C65/3468—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
    • B29C66/01—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
    • B29C66/50—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
    • 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
    • B29C66/70—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
    • 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
    • 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
    • B29C66/5229—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

Abstract

PROBLEM TO BE SOLVED: To dispense with centering during butt fusion between separately molded left and right parts and post-machining, such as removal of burr protruding inward and outward after butt fusion for reducing man-hours, stabilizing quality, and reducing manufacturing costs in a large aperture electrically fusing socket joint, having a plurality of fusion parts where an electric heating wire is embedded in a connection face with a resin tube. SOLUTION: This electrically fusing joint is formed through integral molding, while a fusion part 13 surrounded by the electric heating wire 12, wound up into a coil shape, is arranged in each of left and right insertion ports 11 for inserting the resin tube, and a pair of terminal pins 14, connected to both ends of the electric heating wire 12 respectively, are arranged in each of the fusion parts 13.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明が属する技術分野】本発明は、樹脂管との接合面
に電熱線を埋設し、電熱線への通電による発熱で樹脂管
との融着接合を行う電気融着継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fusion joint in which a heating wire is buried in a joint surface with a resin tube, and fusion bonding with the resin tube is performed by heat generated by energizing the heating wire.

【０００２】[0002]

【従来技術】上下水道管やガス管として近年、樹脂管が
普及しているが、こうした樹脂管による配管工事では、
樹脂管を接続するための継手として、樹脂管との接合面
に電熱線を埋設し、電熱線への通電により樹脂管との融
着接続を行う電気融着継手が多用されている。この継手
によると、通電することにより接合面が加熱溶融される
ため、融着が容易かつ確実に行える利点がある。2. Description of the Related Art In recent years, resin pipes have become widespread as water and sewage pipes and gas pipes.
As a joint for connecting the resin pipe, an electric fusion joint in which a heating wire is buried in a joint surface with the resin pipe and fusion-bonded to the resin pipe by energizing the heating wire is often used. According to this joint, there is an advantage that fusion can be performed easily and reliably because the joint surface is heated and melted by energization.

【０００３】図１は、電気融着継手のうちのソケット継
手を示すもので、該継手１には差し込まれた樹脂管と接
合する内周面に電熱線２がコイル状に埋設されている。
図中、３は電気融着装置のコネクターが差し込まれ、電
熱線２に接続されるターミナルピンである。FIG. 1 shows a socket joint among electric fusion joints. A heating wire 2 is buried in a coil shape on an inner peripheral surface of the joint 1 which is joined to a resin pipe inserted.
In the figure, reference numeral 3 denotes a terminal pin into which the connector of the electric fusion device is inserted and which is connected to the heating wire 2.

【０００４】[0004]

【発明が解決しようとする課題】電気融着継手の電熱線
が埋設される部分の融着部面積は、接合する管の口径が
大きくなる程広い面積が必要であり、また樹脂管との電
気融着を確実に行うには、融着部の単位面積当たり一定
以上のエネルギー量を与える必要があることから、大口
径の継手の融着を行うには多くの電力を必要とするが、
使用電源及び電気融着装置には性能に一定の限界がある
ことから、大口径の場合、一度の通電で融着を行うこと
は困難である。The area of the welded portion of the electric fusion joint where the heating wire is buried needs to be larger as the diameter of the pipe to be joined becomes larger, and the electric connection with the resin pipe is required. In order to perform fusion securely, it is necessary to apply a certain amount of energy per unit area of the fusion portion, so a large amount of power is required to perform fusion of a large diameter joint,
Since the performance of the power supply used and the electric fusion device have certain limits, it is difficult to perform fusion with a single energization for large diameters.

【０００５】そこで大口径の継手、例えばソケット継手
では図２に示すように、樹脂管と接合する内周面に電熱
線４をコイル状に埋設し、電熱線４の各一端に接続され
るターミナルピン５を一対突設した継手の一半６ａと、
他半６ｂを成形し、ついで両者６ａ及び６ｂを図３に示
すように突き合わせて融着し、一体化することが行われ
ているが、両者６ａ及び６ｂを芯出しゝて突き合わせ融
着することは困難であると共に、突き合わせた融着部分
に内外に突出するバリ７、８を除去する切削加工が必要
である。Therefore, in a large-diameter joint, for example, a socket joint, as shown in FIG. 2, a heating wire 4 is embedded in a coil shape on an inner peripheral surface to be joined to a resin pipe, and a terminal connected to one end of the heating wire 4 is provided. A half 6a of a joint having a pair of pins 5 projecting therefrom;
The other half 6b is formed, then the two 6a and 6b are butt-fused and integrated as shown in FIG. 3, but the two 6a and 6b are centered and butt-fused. Is difficult, and it is necessary to perform a cutting process for removing burrs 7, 8 protruding inward and outward at the butted fused portions.

【０００６】本発明は、一体成形することによって上記
の問題を解消した電気融着継手と、その製造法を提供す
ることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrofusion joint which solves the above-mentioned problem by integrally molding, and a method of manufacturing the same.

【０００７】[0007]

【課題の解決手段】請求項１に係わる発明の電気融着継
手は、樹脂管との接合面に電熱線を埋設した融着部を複
数カ所形成すると共に、各融着部にそれぞれターミナル
ピンを一対づゝ付設した一体成形品よりなることを特徴
とする。本発明で用いる電熱線とは、裸の電熱線と被覆
電熱線を含むものである。According to the first aspect of the present invention, there is provided an electric fusion joint, wherein a plurality of fusion parts in which a heating wire is buried are formed on a joint surface with a resin tube, and a terminal pin is provided at each fusion part. It is characterized by being composed of an integrally molded product provided with a pair. The heating wire used in the present invention includes a naked heating wire and a coated heating wire.

【０００８】本発明は、樹脂管が差込まれる差込口を備
えたソケット系の継手のみならず、樹脂管に側面より当
てられるサドル部を備えたサドル系の継手に対しても適
用可能で、ソケット系の継手においては電熱線は通常、
コイル状に埋設され、サドル系の継手においては電熱線
は通常、渦巻状に埋設されるが、いづれのタイプの継手
においても電熱線をジグザグ状に埋設することも可能で
ある。The present invention is applicable not only to a socket-type joint having an insertion port into which a resin pipe is inserted, but also to a saddle-type joint having a saddle portion to be applied to the resin pipe from the side. In the case of socket type joints, the heating wire is usually
The heating wire is usually buried in a coil shape in a saddle type joint, but it is also possible to embed the heating wire in a zigzag shape in any type of joint.

【０００９】請求項２に係わる発明は、請求項１に係わ
る発明の電気融着継手の製造法に関するもので、コイル
状又は渦巻状に巻き込み、或いはジグザグ状に折曲げ
て、両端にターミナルピンを接続した電熱線を金型内の
複数カ所に設置し、射出成形することを特徴とする。A second aspect of the present invention relates to a method for manufacturing an electrofusion joint according to the first aspect of the present invention, wherein the terminal is wound in a coil shape or a spiral shape or bent in a zigzag shape, and terminal pins are provided at both ends. It is characterized in that the connected heating wires are installed at a plurality of locations in a mold and injection-molded.

【００１０】[0010]

【発明の実施の形態】図４に示すソケット継手は、樹脂
管が差し込まれる左右の差込口１１に電熱線１２をコイ
ル状に巻いた融着部１３を設け、各融着部１３にそれぞ
れ電熱線１２の両端に接続されるターミナルピン１４を
一対づゝ設けたもので、その製造は、コイル状に巻き込
んだ電熱線或いはスリーブにコイル状に巻き込んだ電熱
線を一対、金型に設置すると共に、各電熱線の両端に接
続されるターミナルピンを金型に取付け、射出成形する
ことにより行われる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The socket joint shown in FIG. 4 is provided with a fusion portion 13 in which a heating wire 12 is wound in a coil shape at left and right insertion ports 11 into which resin pipes are inserted. It is provided with a pair of terminal pins 14 connected to both ends of the heating wire 12, and is manufactured by installing a pair of heating wires wound in a coil shape or a heating wire wound in a coil shape in a sleeve. At the same time, terminal pins connected to both ends of each heating wire are attached to a mold and injection molding is performed.

【００１１】図５に示すソケット継手は、左右の差込口
２１にそれぞれ電熱線２２をコイル状に巻いた融着部２
３を一対づゝ設けると共に、各融着部２３にターミナル
ピン２４を一対づゝ設けたものである。図５に示すソケ
ット継手も、図４に示すソケット継手と同様にして製造
される。The socket joint shown in FIG. 5 has a welding portion 2 in which a heating wire 22 is wound in a coil shape on each of left and right insertion ports 21.
3 and a pair of terminal pins 24 are provided at each of the fused portions 23. The socket joint shown in FIG. 5 is also manufactured in the same manner as the socket joint shown in FIG.

【００１２】上記各実施形態は、いづれもソケット継手
を示すが、他のソケット系の継手、例えばチーズ継手、
レジューサ継手、エルボ継手、キャップ継手等において
も同様に構成することができる。またサドル継手やサー
ビスチー継手等、サドル系の継手においてもサドル部に
渦巻状に埋設される電熱線を同心円上に複数カ所に配置
して融着部を複数カ所設け、各融着部に一対のターミナ
ルピンを設けることができる。Although each of the above embodiments shows a socket joint, other socket-based joints such as a cheese joint,
The same can be applied to reducer joints, elbow joints, cap joints and the like. Also, in saddle-type joints such as saddle joints and service tee joints, the heating wire spirally embedded in the saddle portion is arranged at a plurality of concentric circles to provide a plurality of fusion parts, and a pair of fusion parts is provided for each fusion part. Terminal pins can be provided.

【００１３】また電熱線はコイル状又は渦巻状に巻いて
埋設する代わりにジグザグ状に折曲げて埋設してもよ
い。The heating wire may be embedded in a zigzag shape instead of being wound and embedded in a coil or spiral shape.

【００１４】[0014]

【発明の効果】本発明は以上のように、樹脂管との接合
面に電熱線を埋設した融着部を複数カ所有する大口径の
継手を一体成形したもので、従来の継手のように芯出し
ゝて突き合わせ融着したり、突き合わせ融着後、内外に
突出するバリを除去する後加工が不要となるため、その
分工数が減って品質管理の不安定要因が減少して品質が
安定し、かつ製造コストを低減させることができる。As described above, according to the present invention, a large-diameter joint having a plurality of fused portions in which a heating wire is embedded in a joint surface with a resin pipe is integrally formed. No post-processing is needed to remove and project burrs protruding in and out after butt-welding and butt-welding, reducing the number of man-hours and reducing unstable factors in quality control and stabilizing quality. In addition, the manufacturing cost can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】電気融着ソケット継手の断面図。FIG. 1 is a cross-sectional view of an electric fusion socket joint.

【図２】大口径のソケット継手を製造するときの課程を
示す断面図。FIG. 2 is a sectional view showing a process when manufacturing a large-diameter socket joint.

【図３】突き合わせ融着後の断面図。FIG. 3 is a cross-sectional view after butt fusion.

【図４】本発明に係わる電気融着継手の断面図。FIG. 4 is a sectional view of an electric fusion joint according to the present invention.

【図５】本発明に係わる電気融着継手の別の例の断面
図。FIG. 5 is a cross-sectional view of another example of the electrofusion joint according to the present invention.

【符号の説明】[Explanation of symbols]

１１、２１・・差込口 １２、２２・・電熱線 １３、２３・・融着部 １４、２４・・ターミナルピン 11, 21 ··· Inlet 12, 22 ·· Heating wire 13, 23 ··· Fused part 14, 24 ·· Terminal pin

Claims (2)

【特許請求の範囲】[The claims] 【請求項１】樹脂管との接合面に電熱線を埋設した融着
部を複数カ所形成すると共に、各融着部にそれぞれター
ミナルピンを一対づゝ付設した一体成形品よりなること
を特徴とする電気融着継手。An integrated molded product in which a plurality of fusion parts in which a heating wire is buried are formed at a joint surface with a resin pipe and a plurality of terminal pins are provided at each of the fusion parts. Electric fusion joint. 【請求項２】コイル状又は渦巻状に巻き込み、或いはジ
グザグ状に折曲げて、両端にターミナルピンを接続した
電熱線を金型内の複数カ所に設置し、射出成形すること
を特徴とする請求項１記載の電気融着継手の製造法。2. A heating wire having a coil or a spiral wound or bent in a zigzag shape and having terminal pins connected to both ends at a plurality of locations in a mold, and injection molding. Item 2. A method for producing an electrofusion joint according to Item 1.
JP2001052347A 2001-02-27 2001-02-27 Electrically fusing joint Pending JP2002257284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001052347A JP2002257284A (en) 2001-02-27 2001-02-27 Electrically fusing joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001052347A JP2002257284A (en) 2001-02-27 2001-02-27 Electrically fusing joint

Publications (1)

Publication Number Publication Date
JP2002257284A true JP2002257284A (en) 2002-09-11

Family

ID=18912994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001052347A Pending JP2002257284A (en) 2001-02-27 2001-02-27 Electrically fusing joint

Country Status (1)

Country Link
JP (1) JP2002257284A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016534293A (en) * 2013-08-08 2016-11-04 プロパー パイプ イーエイチエフ． Fittings that allow nondestructive pressure testing of seal integrity
JP2018532076A (en) * 2015-02-06 2018-11-01 メンコス，ルベン，アドルフォ Electric fusion pipe joint, method and system
JP2018194142A (en) * 2017-05-20 2018-12-06 智 小野寺 Addition of pd (pdocj) system, pd joint and group related to pd component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016534293A (en) * 2013-08-08 2016-11-04 プロパー パイプ イーエイチエフ． Fittings that allow nondestructive pressure testing of seal integrity
JP2018532076A (en) * 2015-02-06 2018-11-01 メンコス，ルベン，アドルフォ Electric fusion pipe joint, method and system
JP2018194142A (en) * 2017-05-20 2018-12-06 智 小野寺 Addition of pd (pdocj) system, pd joint and group related to pd component

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