JPH10246382A - Electrofusion joint for synthetic resin pipe - Google Patents

Electrofusion joint for synthetic resin pipe

Info

Publication number
JPH10246382A
JPH10246382A JP5066497A JP5066497A JPH10246382A JP H10246382 A JPH10246382 A JP H10246382A JP 5066497 A JP5066497 A JP 5066497A JP 5066497 A JP5066497 A JP 5066497A JP H10246382 A JPH10246382 A JP H10246382A
Authority
JP
Japan
Prior art keywords
pipe
joint
synthetic resin
joint body
heating element
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
JP5066497A
Other languages
Japanese (ja)
Inventor
Eiichi Sugiura
鋭一 杉浦
Kenji Kamata
建次 鎌田
Michio Uzawa
道雄 鵜沢
Masaaki Satake
正明 佐竹
Satoshi Shibazaki
智 芝崎
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP5066497A priority Critical patent/JPH10246382A/en
Publication of JPH10246382A publication Critical patent/JPH10246382A/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
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled 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
    • B29C66/01—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
    • B29C66/122—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
    • B29C66/1226—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 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
    • B29C66/01—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
    • B29C66/1228—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 one monotone curved 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
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
    • B29C66/976—Checking completion of joining or correct joining by using indications on at least one of the joined parts by the use of an indicator pin, e.g. being integral with one 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
    • 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

Abstract

PROBLEM TO BE SOLVED: To make it easily installable in pipe ends even at a time when body these pipe ends are not set up rectilinearly as well as to secure an extent of joining strength in these pipe ends being high with each other. SOLUTION: In this electrofusion joint for a synthetic resin pipe, equipped with a joint body 12, of the same material as two pipes 11 and 12, for joining two synthetic resin pipes 10 and 11 to each other, and an energized heating element 13 embedded in this joint body 10, a pipe end of the pipe 11 on the other is inserted into an expanded pipe end of the pipe 10 on one side, and this joint body 12 is inserted into a space (S) made up in a gap between the expanded pipe end of the pipe 10 on one side and the pipe end of the pipe 11 on the other.

Description

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

【０００１】[0001]

【発明の属する技術分野】この発明は、合成樹脂管用電
気融着継手、特に、両管端部が直線状に配置されていな
いときでも、管端部に容易に装着することができ、しか
も、管端部同士の高い接合強度が得られる合成樹脂管用
電気融着継手に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fusion joint for synthetic resin pipes, and more particularly, to an electric fusion joint which can be easily attached to pipe ends even when both pipe ends are not linearly arranged. The present invention relates to an electric fusion joint for a synthetic resin pipe that can obtain a high joining strength between pipe ends.

【０００２】[0002]

【従来の技術】従来、水道管等に使用されているポリエ
チレン樹脂管の接合継手として合成樹脂管用電気融着継
手がある。この合成樹脂管用電気融着継手は、図５に示
すように、両管端部１に跨がって装着されるポリエチレ
ン樹脂製の厚肉の筒状継手本体２と、継手本体２内に埋
め込まれたコイル状ニクロム線からなる通電発熱体３と
を有するものである。継手本体２の中央内周面には、リ
ング状ストッパー９が形成されている。通電発熱体３に
は、ターミナル４を介して電源５から電流が流される。
電流は、コントローラ６によって制御される。2. Description of the Related Art Conventionally, there is an electric fusion joint for a synthetic resin pipe as a joint for a polyethylene resin pipe used for a water pipe or the like. As shown in FIG. 5, the electric fusion joint for a synthetic resin pipe is a thick tubular joint body 2 made of polyethylene resin which is attached across both pipe ends 1 and embedded in the joint body 2. And a heating element 3 made of a coiled nichrome wire. A ring-shaped stopper 9 is formed on the central inner peripheral surface of the joint main body 2. A current flows from the power supply 5 to the energizing heating element 3 via the terminal 4.
The current is controlled by the controller 6.

【０００３】上述した従来継手によって管端部１同士を
接合するには、次のようにする。即ち、管端部１の外表
面を切削して酸化等により劣化した部分を除去する。次
いで、両管端部１に跨がって継手本体２を装着する。そ
して、通電発熱体３に通電して、管端部１の外周面と継
手本体２の内周面とを加熱、溶融させる。かくして、両
管端部１が互いに融着し、接合される。In order to join the pipe ends 1 by the above-mentioned conventional joint, the following is performed. That is, the outer surface of the pipe end 1 is cut to remove a portion degraded by oxidation or the like. Next, the joint main body 2 is mounted over both pipe ends 1. Then, electricity is supplied to the electric heating element 3 to heat and melt the outer peripheral surface of the pipe end 1 and the inner peripheral surface of the joint body 2. Thus, the two tube ends 1 are fused and joined together.

【０００４】なお、図６に示すように、継手本体２に
は、管端部１の外周面と継手本体２の内周面との溶融状
態を管理するためのインジケーター７が設けられてい
る。インジケーター７は、継手本体２に形成された貫通
孔８内に挿通された棒体からなっている。通電によって
管端部１の外周面と継手本体２の内周面とが溶融する
と、管端部１と継手本体２との接触部分の界面圧力が上
昇するので、インジケーター７が***する。この***量
を監視することによって、管端部１の外周面と継手本体
２の内周面との溶融状態を管理することができる。イン
ジケーター７が図７に示すように、継手本体２の表面よ
りも***したら、管端部１の外周面と継手本体２の内周
面とが完全に溶融したと判断して通電を中止する。[0006] As shown in FIG. 6, the joint body 2 is provided with an indicator 7 for managing the molten state of the outer peripheral surface of the pipe end 1 and the inner peripheral surface of the joint body 2. The indicator 7 is formed of a rod inserted into a through hole 8 formed in the joint body 2. When the outer peripheral surface of the pipe end 1 and the inner peripheral surface of the joint main body 2 are melted by energization, the interface pressure at the contact portion between the pipe end 1 and the joint main body 2 increases, so that the indicator 7 rises. By monitoring the amount of protrusion, the molten state of the outer peripheral surface of the pipe end 1 and the inner peripheral surface of the joint body 2 can be managed. When the indicator 7 rises above the surface of the joint body 2 as shown in FIG. 7, it is determined that the outer peripheral surface of the pipe end 1 and the inner peripheral surface of the joint body 2 have completely melted, and the energization is stopped.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上述し
た従来の合成樹脂管用電気融着継手は、次のような問題
を有していた。即ち、継手本体２の内径と管端部１の外
径とがほぼ等しいので、管端部同士を直線的に配置でき
ないようなときには、継手を管端部１に装着することが
できないことがあった。小径管の場合には、ある程度、
強制的に管端部同士を直線的に曲げることが可能である
が、大径管になると、これが行えない。However, the above-mentioned conventional electric fusion joint for a synthetic resin pipe has the following problems. That is, since the inner diameter of the joint main body 2 and the outer diameter of the pipe end 1 are substantially equal to each other, when the pipe ends cannot be arranged linearly, the joint may not be attached to the pipe end 1 in some cases. Was. In the case of small diameter pipes,
It is possible to forcibly bend the pipe ends linearly, but this is not possible with large diameter pipes.

【０００６】従って、この発明の目的は、管端部同士を
直線的に配置できないようなときであっても、管端部に
装着することができ、しかも、管端部同士の高い接合強
度が得られる合成樹脂管用電気融着継を提供することに
ある。Accordingly, it is an object of the present invention to be able to attach the pipe ends to the pipe ends even when the pipe ends cannot be arranged linearly, and to achieve a high joint strength between the pipe ends. An object of the present invention is to provide an obtained electric fusion splice for a synthetic resin pipe.

【０００７】[0007]

【課題を解決するための手段】請求項１記載の発明は、
合成樹脂管同士を接合するための、前記管と同一材質の
継手本体と、前記継手本体内に埋め込まれた通電発熱体
とを備えた合成樹脂管用電気融着継手において、他方の
管の管端部は、一方の管の拡管された管端部内に挿入さ
れ、前記継手本体は、前記他方の管の管端部と前記一方
の管の拡管された管端部との間に形成された隙間内に挿
入されていることに特徴を有するものである。According to the first aspect of the present invention,
A tube end of the other tube in a synthetic resin tube electric fusion joint including a joint body of the same material as the tube and a current-carrying heating element embedded in the joint body for joining the synthetic resin tubes to each other. Part is inserted into the expanded pipe end of one pipe, and the joint body is formed with a gap formed between the pipe end of the other pipe and the expanded pipe end of the one pipe. It is characterized in that it is inserted inside.

【０００８】請求項２記載の発明は、前記一方の管の拡
管された管端部は、平行管形状、テーパー管形状または
中央膨出管形状に形成され、前記継手本体の外周面は、
これらの管端部の内周面に密着するように形成されてい
ることに特徴を有するものである。According to a second aspect of the present invention, the expanded pipe end of the one pipe is formed in a parallel pipe shape, a tapered pipe shape, or a central bulging pipe shape, and an outer peripheral surface of the joint body is
It is characterized in that it is formed so as to be in close contact with the inner peripheral surface of these tube ends.

【０００９】請求項３記載の発明は、合成樹脂管同士を
接合するための、前記管と同一材質の継手本体と、前記
継手本体内に埋設された通電発熱体とを備えた合成樹脂
管用電気融着継手において、前記継手本体は、前記両管
端部の外周面に嵌め込まれる前記通電発熱体が埋め込ま
れた継手リングと、前記継手リングの外周面に跨がって
装着される連結管とからなり、前記連結管の内周面に
は、前記両管端部の端面が当接されるストッパーが形成
されていることに特徴を有するものである。According to a third aspect of the present invention, there is provided an electric machine for a synthetic resin tube, comprising: a joint body of the same material as the tube for joining the synthetic resin tubes; and an energization heating element embedded in the joint body. In the fusion spliced joint, the joint main body includes a joint ring in which the energizing heating element is fitted into the outer peripheral surfaces of the two pipe ends, and a connecting pipe that is mounted across the outer peripheral surface of the joint ring. And a stopper is formed on the inner peripheral surface of the connecting pipe, the stopper being in contact with the end faces of the two pipe ends.

【００１０】請求項４記載の発明は、前記通電発熱体
は、ニクロム線または通電発熱繊維からなっていること
に特徴を有するものである。The invention according to claim 4 is characterized in that the energizing heating element is made of a nichrome wire or an energizing heating fiber.

【００１１】[0011]

【発明の実施の形態】次に、この発明の合成樹脂管用電
気融着継手の一実施態様を、図面を参照しながら説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the electric fusion joint for a synthetic resin pipe of the present invention will be described with reference to the drawings.

【００１２】図１は、管端部がテーパ管形状に拡管され
た、この発明の合成樹脂管用電気融着継手を示す断面
図、図２は、管端部が中央膨出管形状に拡管された、こ
の発明の合成樹脂管用電気融着継手を示す断面図、図３
は、管端部が平行管形状に拡管された、この発明の合成
樹脂管用電気融着継手を示す断面図、図４は、継手本体
が継手リングと連結管とからなる、この発明の合成樹脂
管用電気融着継手を示す断面図である。FIG. 1 is a sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention in which a pipe end is expanded in a tapered pipe shape. FIG. 2 is a pipe end expanded in a central bulging pipe shape. FIG. 3 is a sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention.
Is a cross-sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention in which a pipe end is expanded in a parallel pipe shape, and FIG. 4 is a synthetic resin of the present invention in which a joint body comprises a joint ring and a connecting pipe. It is sectional drawing which shows the electrofusion joint for pipes.

【００１３】図１において、１０は、管端部がテーパ管
形状に拡管された一方の合成樹脂管、１１は、拡管され
た一方の合成樹脂管１０の管端部内に挿入された他方の
合成樹脂管であり、何れの管も、ポリエチレン製であ
る。１２は、他方の管１１の管端部と一方の管１０の拡
管された管端部との間に形成された隙間（Ｓ）内に挿入
されたリング状継手本体である。継手本体１２は、管１
０、１１と同一材質からなっている。１３は、継手本体
１２内に埋め込まれたコイル状通電発熱体である。In FIG. 1, reference numeral 10 denotes one synthetic resin pipe whose pipe end is expanded into a tapered pipe shape, and 11 denotes another synthetic resin pipe inserted into the pipe end of one expanded synthetic resin pipe 10. It is a resin tube, and both tubes are made of polyethylene. Reference numeral 12 denotes a ring-shaped joint main body inserted into a gap (S) formed between the pipe end of the other pipe 11 and the expanded pipe end of the one pipe 10. The joint body 12 is a pipe 1
It is made of the same material as 0 and 11. Reference numeral 13 denotes a coil-shaped heating element embedded in the joint body 12.

【００１４】通電発熱体１３としては、ニクロム線以外
にマイクロメタルファイバーとアラミド繊維とからなる
通電発熱繊維等を使用することもできる。この通電発熱
繊維は、ニクロム線とほぼ同等の電気熱特性を有してお
り、断線の恐れがなく、継手本体１２内への埋込みも容
易に行えるといった利点を有している。As the electric heating element 13, an electric heating fiber made of micro metal fiber and aramid fiber can be used other than the nichrome wire. The current-carrying heating fiber has substantially the same electric heat characteristics as the nichrome wire, has the advantage that there is no risk of disconnection, and that it can be easily embedded in the joint body 12.

【００１５】このように構成されている、この発明の合
成樹脂管用電気融着継手によって、管１０と１１とを接
合するには、次のようにする。先ず、予め、他方の管１
１の管端部外周面に、通電発熱体１３が埋め込まれた継
手本体１２を嵌め込んでおく。次に、一方の管１０の拡
管された管端部内に、他方の管１１の管端部を嵌め込
む。次に、他方の管１１の管端部と一方の管１０の拡管
された管端部との間に形成された隙間（Ｓ）内に継手本
体１２を押し込む。そして、ターミナル（図示せず）に
通電ケーブル（図３参照）を接続し、通電発熱体１３に
通電して、管端部と継手本体１２とを加熱、溶融させ
る。これによって管端部同士が継手本体１２を介して互
いに融着し、管１０と１１とが互いに接合される。The joining of the pipes 10 and 11 by the thus constructed electric fusion joint for synthetic resin pipes of the present invention is performed as follows. First, the other tube 1
The joint main body 12 in which the electric heating element 13 is embedded is fitted into the outer peripheral surface of the tube end portion of the tube 1. Next, the tube end of the other tube 11 is fitted into the expanded tube end of one tube 10. Next, the joint body 12 is pushed into the gap (S) formed between the pipe end of the other pipe 11 and the expanded pipe end of the one pipe 10. Then, an energizing cable (see FIG. 3) is connected to a terminal (not shown), and an energizing heating element 13 is energized to heat and melt the pipe end and the joint body 12. As a result, the pipe ends are fused to each other via the joint body 12, and the pipes 10 and 11 are joined to each other.

【００１６】一方の管１０の管端部は、拡管されている
ので、他方の管端部は、拡管された管端部内においてあ
る程度、傾斜させることが可能である。従って、両管端
部が直線状に配置されていないときでも、継手を管端部
に装着することができる。Since the tube end of one tube 10 is expanded, the other tube end can be inclined to some extent within the expanded tube end. Therefore, the joint can be attached to the pipe ends even when both pipe ends are not linearly arranged.

【００１７】継手本体１２を前記隙間（Ｓ）の外部まで
延長すれば、上述したインジケーターを設けることがで
きる。一方の管１０の拡管させる管端部の形状は、図２
に示すように、中央膨出管形状、あるいは、図３に示す
ように平行管形状であっても良い。If the joint body 12 is extended to the outside of the gap (S), the indicator described above can be provided. The shape of the end of one pipe 10 to be expanded is shown in FIG.
As shown in FIG. 3, a central bulging tube shape or a parallel tube shape as shown in FIG.

【００１８】中央膨出管形状に拡管させたときには、融
着面積が図１および図３の継手の場合に比べて広くなる
ので、管１０と管１１との接合強度が一層、高まる。な
お、管端部を中央膨出管形状に拡管したときには、後か
ら、隙間（Ｓ）内に継手本体１２を押し込むことができ
ないので、予め、拡管した管端部内に継手本体１２を嵌
め込んでおき、この後、他方の管端部を継手本体１２内
に嵌め込む。When the pipe is expanded in the shape of the central bulge, the fusion area is larger than that of the joints shown in FIGS. 1 and 3, so that the joining strength between the pipe 10 and the pipe 11 is further increased. When the pipe end is expanded in the shape of a central bulging pipe, the joint body 12 cannot be pushed into the gap (S) later, so that the joint body 12 is previously fitted into the expanded pipe end. After that, the other pipe end is fitted into the joint body 12.

【００１９】図４に示す、この発明の別のポリエチレン
等の合成樹脂管用電気融着継手は、継手本体１２が両管
端部の外周面に嵌め込まれる継手リング１４と、継手リ
ング１４の外周面に跨がって装着される連結管１５とか
らなっている。継手リング１４および連結管１５は、何
れも、管１０、１１と同一材質からなっている。通電発
熱体１３は、各継手リング１４内に埋め込まれている。
連結管１５の中央内周面には、両管端部の端面が当接さ
れるリング状ストッパー１６が形成されている。As shown in FIG. 4, another electrofusion joint for synthetic resin pipes such as polyethylene of the present invention has a joint ring 14 in which a joint body 12 is fitted to the outer peripheral surfaces of both pipe ends, and an outer peripheral surface of the joint ring 14. And a connecting pipe 15 which is attached to the vehicle. The joint ring 14 and the connecting pipe 15 are both made of the same material as the pipes 10 and 11. The electric heating element 13 is embedded in each joint ring 14.
A ring-shaped stopper 16 is formed on the center inner peripheral surface of the connecting pipe 15 so that the end faces of both pipe end portions abut.

【００２０】このように構成されている、この発明の別
の合成樹脂管用電気融着継手によって、管１０と１１と
を接合するには、次のようにする。即ち、予め、両管端
部外周面に継手リング１４を嵌め込んでおく。次に、両
管端部をその端面がストッパー１６に当接するまで連結
管１５内に挿入する。次に、両管端部と連結管１５との
間に形成された隙間（Ｓ）内に継手リング１４を押し込
む。そして、ターミナル（図示せず）に通電ケーブル
（図３参照）を接続し、各通電発熱体１３に通電して、
管端部と継手本体１２とを加熱、溶融させる。これによ
って管端部同士が継手本体１２を介して互いに融着し、
管１０と１１とが互いに接合される。The joining of the pipes 10 and 11 by the thus constructed electric fusion joint for synthetic resin pipes of the present invention is performed as follows. That is, the joint ring 14 is fitted in advance on the outer peripheral surfaces of both pipe ends. Next, both pipe ends are inserted into the connecting pipe 15 until their end faces abut against the stopper 16. Next, the joint ring 14 is pushed into the gap (S) formed between both pipe ends and the connection pipe 15. Then, an energizing cable (see FIG. 3) is connected to a terminal (not shown), and each energizing heating element 13 is energized,
The pipe end and the joint body 12 are heated and melted. Thereby, the pipe ends are fused to each other via the joint body 12, and
Tubes 10 and 11 are joined together.

【００２１】上述した、この発明の別の合成樹脂管用電
気融着継手によっても、連結管１５と管端部との間に、
隙間（Ｓ）が形成されているので、両管端部が直線状に
配置されていないときでも、継手を管端部に装着するこ
とができる。継手リング１４を前記隙間（Ｓ）の外部ま
で延長すれば、上述したインジケーターを設けることが
できる。According to the above-described electric fusion joint for a synthetic resin pipe of the present invention, the connecting pipe 15 and the pipe end can be connected to each other.
Since the gap (S) is formed, the joint can be attached to the pipe end even when both pipe ends are not arranged linearly. If the joint ring 14 is extended to the outside of the gap (S), the indicator described above can be provided.

【００２２】[0022]

【発明の効果】以上説明したように、この発明によれ
ば、一方の管端部を拡管して管継手部に隙間を形成し、
この隙間内に通電発熱体が埋め込まれた継手本体を押し
込むか、または、管端部の周囲に嵌め込まれる連結管と
管端部との間に隙間を形成し、この隙間内に通電発熱体
が埋め込まれた継手リングを押し込むことによって、両
管端部が直線状に配置されていないときでも、継手を管
端部に容易に装着することができ、しかも、管端部同士
の高い接合強度が得られるといった有用な効果がもたら
される。As described above, according to the present invention, a gap is formed in the pipe joint by expanding one pipe end.
The joint body in which the electric heating element is embedded is pushed into the gap, or a gap is formed between the connecting pipe fitted around the pipe end and the pipe end, and the electric heating element is inserted into the gap. By pushing in the embedded joint ring, the joint can be easily attached to the pipe end even when both pipe ends are not arranged linearly, and high joint strength between the pipe ends is achieved. Useful effects such as being obtained are obtained.

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

【図１】管端部がテーパ管形状に拡管された、この発明
の合成樹脂管用電気融着継手を示す断面図である。FIG. 1 is a sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention in which a pipe end is expanded into a tapered pipe shape.

【図２】管端部が中央膨出管形状に拡管された、この発
明の合成樹脂管用電気融着継手を示す断面図である。FIG. 2 is a cross-sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention, in which a pipe end is expanded into a central swelling pipe shape.

【図３】管端部が平行管形状に拡管された、この発明の
合成樹脂管用電気融着継手を示す断面図である。FIG. 3 is a cross-sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention in which a pipe end is expanded in a parallel pipe shape.

【図４】継手本体が継手リングと連結管とからなる、こ
の発明の合成樹脂管用電気融着継手を示す断面図であ
る。FIG. 4 is a cross-sectional view showing an electric fusion joint for a synthetic resin pipe of the present invention, in which a joint main body includes a joint ring and a connecting pipe.

【図５】管端部に装着された、従来の合成樹脂管用電気
融着継手を示す断面図である。FIG. 5 is a cross-sectional view showing a conventional electric fusion joint for a synthetic resin pipe attached to a pipe end.

【図６】管端部の外面と継手本体の内面との融着状態を
示す断面図である。FIG. 6 is a cross-sectional view showing a fusion state between an outer surface of a pipe end and an inner surface of a joint body.

【図７】インジケーターの***を示す断面図である。FIG. 7 is a cross-sectional view showing a protrusion of the indicator.

【符号の説明】[Explanation of symbols]

１：管端部 ２：継手本体 ３：通電発熱体 ４：ターミナル ５：電源 ６：コントローラー ７：インジケーター ８：貫通孔 ９：リング状ストッパー １０：一方の管 １１：他方の管 １２：継手本体 １４：継手リング １５：連結管 １６：リング状ストッパー 1: pipe end 2: joint body 3: energized heating element 4: terminal 5: power supply 6: controller 7: indicator 8: through hole 9: ring-shaped stopper 10: one pipe 11: other pipe 12: fitting body 14 : Joint ring 15: Connecting pipe 16: Ring stopper

───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐竹 正明 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 芝崎 智 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaaki Satake 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Satoshi Shibazaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Honko Co., Ltd.

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 合成樹脂管同士を接合するための、前記
管と同一材質の継手本体と、前記継手本体内に埋め込ま
れた通電発熱体とを備えた合成樹脂管用電気融着継手に
おいて、 他方の管の管端部は、一方の管の拡管された管端部内に
挿入され、前記継手本体は、前記他方の管の管端部と前
記一方の管の拡管された管端部との間に形成された隙間
内に挿入されていることを特徴とする合成樹脂管用電気
融着継手。1. An electric fusion joint for a synthetic resin pipe, comprising: a joint body made of the same material as the tube for joining the synthetic resin pipes together; and an electric heating element embedded in the joint body. The pipe end of the pipe is inserted into the expanded pipe end of one of the pipes, and the joint body is located between the pipe end of the other pipe and the expanded pipe end of the one pipe. An electric fusion joint for a synthetic resin tube, wherein the electric fusion joint is inserted into a gap formed in the joint. 【請求項２】 前記一方の管の拡管された管端部は、平
行管形状、テーパー管形状または中央膨出管形状に形成
されていることを特徴とする、請求項１記載の合成樹脂
管用電気融着継手。2. The synthetic resin pipe according to claim 1, wherein the expanded pipe end of the one pipe is formed in a parallel pipe shape, a tapered pipe shape, or a central bulging pipe shape. Electric fusion joint. 【請求項３】 合成樹脂管同士を接合するための、前記
管と同一材質の継手本体と、前記継手本体内に埋設され
た通電発熱体とを備えた合成樹脂管用電気融着継手にお
いて、 前記継手本体は、前記両管端部の外周面に嵌め込まれ
る、前記通電発熱体が埋め込まれた継手リングと、前記
継手リングの外周面に跨がって装着される連結管とから
なり、前記連結管の内周面には、前記両管端部の端面が
当接されるストッパーが形成されていることを特徴とす
る合成樹脂管用電気融着継手。3. An electric fusion joint for a synthetic resin pipe, comprising: a joint body made of the same material as the pipe for joining the synthetic resin pipes together; and a current-carrying heating element embedded in the joint body. The joint body includes a joint ring in which the energizing heating element is embedded and fitted to the outer peripheral surfaces of both pipe ends, and a connecting pipe that is mounted across the outer peripheral surface of the joint ring. An electric fusion joint for a synthetic resin pipe, wherein a stopper is formed on an inner peripheral surface of the pipe so that end faces of both ends of the pipe are in contact with each other. 【請求項４】 前記通電発熱体は、ニクロム線または通
電発熱繊維からなっていることを特徴とする、請求項１
から３のうちの何れか１つに記載された合成樹脂管用電
気融着継手。4. The heating element according to claim 1, wherein the heating element is made of a nichrome wire or a heating fiber.
4. The electric fusion joint for a synthetic resin pipe according to any one of items 1 to 3.
JP5066497A 1997-03-05 1997-03-05 Electrofusion joint for synthetic resin pipe Pending JPH10246382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5066497A JPH10246382A (en) 1997-03-05 1997-03-05 Electrofusion joint for synthetic resin pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5066497A JPH10246382A (en) 1997-03-05 1997-03-05 Electrofusion joint for synthetic resin pipe

Publications (1)

Publication Number Publication Date
JPH10246382A true JPH10246382A (en) 1998-09-14

Family

ID=12865233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5066497A Pending JPH10246382A (en) 1997-03-05 1997-03-05 Electrofusion joint for synthetic resin pipe

Country Status (1)

Country Link
JP (1) JPH10246382A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030032298A (en) * 2001-10-17 2003-04-26 김학건 a
US6781099B2 (en) 2001-03-12 2004-08-24 Karl-Heinz Krah Gmbh Electrofusion socket forming system
US7204520B2 (en) 2000-08-04 2007-04-17 Friatec Aktiengesellschaft Device for joining components made of fusible plastic
US7389789B2 (en) 2004-01-21 2008-06-24 Raval-Agriculture Cooperative Societies Ltd. Fuel accessory for fuel tank and method for internally attaching same
KR100880384B1 (en) * 2007-09-12 2009-02-02 케이넷(주) Coupling structure of plastic pipe for preventing leakage of fluid
US7913712B2 (en) 2004-01-21 2011-03-29 Raval A.C.S. Ltd. Fuel accessory for fuel tank and method for internally attaching same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7204520B2 (en) 2000-08-04 2007-04-17 Friatec Aktiengesellschaft Device for joining components made of fusible plastic
EP1305154B2 (en) † 2000-08-04 2009-07-22 Friatec Aktiengesellschaft Device for connecting components, which consist of fusible plastic
US6781099B2 (en) 2001-03-12 2004-08-24 Karl-Heinz Krah Gmbh Electrofusion socket forming system
US7144045B2 (en) 2001-03-12 2006-12-05 Karl-Heinz Krah Gmbh Electrofusion socket forming system
US7767938B2 (en) 2001-03-12 2010-08-03 Karl-Heinz Krah Gmbh Electrofusion socket forming system
KR20030032298A (en) * 2001-10-17 2003-04-26 김학건 a
US7389789B2 (en) 2004-01-21 2008-06-24 Raval-Agriculture Cooperative Societies Ltd. Fuel accessory for fuel tank and method for internally attaching same
US7913712B2 (en) 2004-01-21 2011-03-29 Raval A.C.S. Ltd. Fuel accessory for fuel tank and method for internally attaching same
KR100880384B1 (en) * 2007-09-12 2009-02-02 케이넷(주) Coupling structure of plastic pipe for preventing leakage of fluid

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