JPH05240394A - Universal joint with built-in heating wire - Google Patents

Universal joint with built-in heating wire

Info

Publication number
JPH05240394A
JPH05240394A JP4043340A JP4334092A JPH05240394A JP H05240394 A JPH05240394 A JP H05240394A JP 4043340 A JP4043340 A JP 4043340A JP 4334092 A JP4334092 A JP 4334092A JP H05240394 A JPH05240394 A JP H05240394A
Authority
JP
Japan
Prior art keywords
pipe
spherical
heating wire
universal joint
peripheral surface
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
JP4043340A
Other languages
Japanese (ja)
Inventor
Ryuichiro Nakamura
隆一郎 中村
Noboru Umemori
昇 梅森
Osamu Koda
治 甲田
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.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics 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 Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP4043340A priority Critical patent/JPH05240394A/en
Publication of JPH05240394A publication Critical patent/JPH05240394A/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
    • 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
    • B29C66/118—Single monotone curved joints
    • B29C66/1182—Single monotone curved joints the joint being C-shaped
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • 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

PURPOSE:To provide a pipe joint, provided with a built-in heating wire, which can connect a pipe to be connected so as to adjust its angle freely, and surely prevent in-pipe fluid from leaking out after piping work. CONSTITUTION:A spherical shell-shaped socket with a spherical inside surface is provided at the edge of a synthetic resin-made pipe or joint 1, and a heating wire 3 is embedded in the inner periphery of the socket 2 at prescribed intervals. A spherical core 4 is turnably fitted in the spherical shell-shaped socket 2. It is thus possible to adjust the connection angle of the pipe to be connected as necessary. By fusion-jointing the inner periphery of the spherical shell-shaped socket 2 and the outer periphery of the spherical core 4 to each other after connection, it is possible to prevent in-pipe fluid from leaking out.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、被接続管を角度調整自
在に接続できると共に、配管施工後に管内流体が漏洩す
るのを確実に防止できる電熱線を内蔵した自在継手に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint in which a pipe to be connected can be connected in an adjustable angle and a fluid inside the pipe can be surely prevented from leaking after piping is installed.

【０００２】[0002]

【従来の技術】現場で配管施工を行う場合、既設配管等
の思わぬ障害物が存在するために管継手に対して被接続
管を所定の角度傾斜させて接続しなければならないこと
がある。このような場合、従来は実開昭５３ー８２８２
０号公報に提案されているような自在継手を用いて配管
施工を行なっていた。2. Description of the Related Art When performing piping construction on site, it is sometimes necessary to incline a pipe to be connected to a pipe joint by a predetermined angle due to the presence of an unexpected obstacle such as an existing pipe. In such a case, conventionally
Piping was carried out using a universal joint as proposed in Japanese Patent No. 0.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上記の
自在継手は、土圧等の外力が作用したときに球殻状受口
が偏平状に変形して管内流体が漏洩する危険性があっ
た。即ち、この自在継手は球殻状受口と、該受口内に装
着した球状コアとの間にゴムパッキンを介在させて回動
自在に嵌合させた構成からなっているため、球殻状受口
の外周面に土圧等の外力が作用したとき、球状内面を有
する受口が偏平状に変形してゴムパッキンとの接触圧力
が部分的に低下し、管内流体が漏洩する危険性があっ
た。However, in the above universal joint, there is a risk that the spherical shell-shaped receptacle is deformed into a flat shape when an external force such as earth pressure acts, and the fluid in the pipe leaks. That is, since this universal joint has a structure in which a rubber packing is interposed between a spherical shell-shaped receiving port and a spherical core mounted in the receiving port, the spherical joint is rotatably fitted. When an external force such as earth pressure is applied to the outer peripheral surface of the mouth, the receptacle having a spherical inner surface is deformed into a flat shape, and the contact pressure with the rubber packing is partially reduced, which may cause leakage of fluid in the pipe. It was

【０００４】従って、この自在継手を高圧流体の輸送配
管に使用する場合には、被接続管を自在継手に接続して
から球殻状受口の内周面と球状コアの外周面との間に接
着剤を注入して接着接合することも行われているが、接
着剤が万遍なくいき亘らないために、充分な水密性が確
保できないという問題があった。Therefore, when this universal joint is used for a high-pressure fluid transportation pipe, after connecting the pipe to be connected to the universal joint, the space between the inner peripheral surface of the spherical shell-shaped receptacle and the outer peripheral surface of the spherical core is connected. Although an adhesive is injected into and bonded to be bonded, there is a problem that sufficient watertightness cannot be secured because the adhesive does not spread evenly.

【０００５】本発明はかかる課題を解決すべく鋭意検討
の結果なし得たものであって、被接続管を角度調整自在
に接続できると共に、配管施工後に土圧等の外力が作用
しても管内流体が漏洩することのない自在継手を提供す
るものである。The present invention has been made as a result of earnest studies to solve the above problems, and it is possible to connect the pipes to be connected so that the angle can be freely adjusted. Even if an external force such as earth pressure acts after the pipes are installed, It is intended to provide a universal joint in which fluid does not leak.

【０００６】[0006]

【課題を解決するための手段】本発明は、合成樹脂製管
または継手の端部に球状内面を有する球殻状受口を設
け、該受口の内周面に電熱線を所定間隔で埋設すると共
に、該受口内に球状コアを回動自在に嵌合させたことを
特徴とするものである。According to the present invention, a spherical shell-shaped receptacle having a spherical inner surface is provided at an end of a synthetic resin pipe or joint, and heating wires are embedded at predetermined intervals on the inner peripheral surface of the receptacle. In addition, a spherical core is rotatably fitted in the receiving opening.

【０００７】[0007]

【作用】球殻状受口内に球状コアを回動自在に嵌合させ
たので、該球状コアを介して被接続管を角度調整自在に
接続できる。また、被接続管を接続した後で球殻状受口
の内周面に埋設した電熱線に通電して発熱させると、球
殻状受口の内周面と球状コアの外周面とが溶融して融着
接合する。Since the spherical core is rotatably fitted in the spherical shell-shaped receptacle, the connected pipe can be connected through the spherical core so that the angle of the pipe can be adjusted. When the heating wire embedded in the inner peripheral surface of the spherical shell-shaped receiving port is energized to generate heat after connecting the pipe to be connected, the inner peripheral surface of the spherical shell-shaped receiving port and the outer peripheral surface of the spherical core melt. And fusion bonding.

【０００８】[0008]

【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。図１は本発明の一実施例を示す自在継手の
縦断面図、図２は本発明の他の実施例を示す自在継手の
縦断面図、図３は更に本発明の他の実施例を示す自在継
手の縦断面図である。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a vertical sectional view of a universal joint showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of a universal joint showing another embodiment of the present invention, and FIG. 3 is a further embodiment of the present invention. It is a longitudinal cross-sectional view of a universal joint.

【０００９】先ず、図１に示した自在継手について詳細
に説明する。図中Ａ１は本発明の自在継手であって、ポ
リエチレン、ポリプロピレン、ポリブテン等の合成樹脂
からなる継手１の一端部には球状内面を有する球殻状受
口２が設けられている。球殻状受口２の内周面には電熱
線３が所定間隔で埋設されており、該電熱線３の両端部
は球殻状受口２の外面に設けられたコネクター２１のピ
ン２２と接続している。First, the universal joint shown in FIG. 1 will be described in detail. In the figure, A1 is a universal joint of the present invention, and a spherical shell-shaped receptacle 2 having a spherical inner surface is provided at one end of the joint 1 made of a synthetic resin such as polyethylene, polypropylene or polybutene. The heating wire 3 is embedded in the inner peripheral surface of the spherical shell-shaped receptacle 2 at a predetermined interval, and both ends of the heating wire 3 are the pins 22 of the connector 21 provided on the outer surface of the spherical shell-shaped receptacle 2. Connected.

【００１０】また、球殻状受口２内には前記継手１と同
種の合成樹脂からなる球状コア４が装着されている。球
状コア４の外周面は球殻状受口２の球状内面とほぼ同径
の球面に形成されており、受口２の内周面と球状コア４
の外周面とが球面接触して摺動できるようになってい
る。また、球状コア４には被接続管５の端部が嵌挿され
る貫通孔４１が設けられており、該貫通孔４１の内面に
設けた環状溝にゴムパッキン６が装着されている。一
方、継手１の他端部には拡径受口７が設けられており、
該受口７の内周面に電熱線３が所定間隔で螺旋状に埋設
されている。電熱線３の両端部は受口７の外面に設けら
れたコネクター７１のピン７２と接続している。A spherical core 4 made of the same kind of synthetic resin as that of the joint 1 is mounted in the spherical shell-shaped receiving port 2. The outer peripheral surface of the spherical core 4 is formed into a spherical surface having substantially the same diameter as the spherical inner surface of the spherical shell-shaped receptacle 2, and the inner peripheral surface of the receptacle 2 and the spherical core 4 are formed.
The outer peripheral surface of the element is in spherical contact with and can slide. Further, the spherical core 4 is provided with a through hole 41 into which the end of the connected pipe 5 is fitted, and a rubber packing 6 is attached to an annular groove provided on the inner surface of the through hole 41. On the other hand, the expanded end 7 is provided at the other end of the joint 1,
The heating wire 3 is embedded in a spiral shape at a predetermined interval on the inner peripheral surface of the receiving port 7. Both ends of the heating wire 3 are connected to pins 72 of a connector 71 provided on the outer surface of the receptacle 7.

【００１１】この自在継手Ａ１に被接続管５を接続する
場合、球状コア４の貫通孔４１に被接続管５の端部を嵌
挿し、該貫通孔４１の内面に装着したゴムパッキン６を
介して被接続管５を伸縮自在に接続する。次に、被接続
管５の接続角度を適宜調整してから所定の位置にセット
し、コネクター２１に電力線を接続して電熱線３に所定
時間電流を通す。すると、電熱線３が発熱して球殻状受
口２の内周面と球状コア４の外周面とが溶融して融着接
合する。一方、継手１の他端部に設けた拡径受口７に他
方の被接続管５の端部を嵌挿し、該受口７の内周面に埋
設した電熱線３に通電して発熱させると、受口７の内周
面と被接続管５の端部外周面とが溶融して融着接合す
る。When connecting the connected pipe 5 to the universal joint A1, the end portion of the connected pipe 5 is fitted into the through hole 41 of the spherical core 4, and the rubber packing 6 mounted on the inner surface of the through hole 41 is used. To connect the pipe 5 to be connected. Next, the connection angle of the connected pipe 5 is appropriately adjusted and then set at a predetermined position, the power line is connected to the connector 21, and the electric current is passed through the heating wire 3 for a predetermined time. Then, the heating wire 3 generates heat and the inner peripheral surface of the spherical shell-shaped receiving port 2 and the outer peripheral surface of the spherical core 4 are melted and fusion-bonded. On the other hand, the end of the other connected pipe 5 is fitted into the expanded diameter receiving port 7 provided at the other end of the joint 1, and the heating wire 3 embedded in the inner peripheral surface of the receiving port 7 is energized to generate heat. Then, the inner peripheral surface of the receiving port 7 and the outer peripheral surface of the end portion of the connected pipe 5 are melted and fusion-bonded.

【００１２】図２に示した自在継手Ａ２は、前記実施例
と同様にポリエチレン等の合成樹脂からなる管１の一端
部に球状内面を有する球殻状受口２を設けたものであ
る。球殻状受口２の内周面には電熱線３が所定間隔で埋
設されており、該電熱線３の両端部は球殻状受口２の外
面に設けられたコネクター２１のピン２２と接続してい
る。また、球殻状受口２内には球状コア４が回動自在に
嵌合されており、該球状コア４に被接続管５の端部が嵌
挿される貫通孔４１が設けられている。貫通孔４１の内
周面には電熱線３が所定間隔で螺旋状に埋設されてお
り、該電熱線３の両端部は球状コア４から延出した円筒
部４２の外面に設けられたコネクター４３のピン４４と
接続している。In the universal joint A2 shown in FIG. 2, a spherical shell-shaped receptacle 2 having a spherical inner surface is provided at one end of a pipe 1 made of a synthetic resin such as polyethylene as in the above-mentioned embodiment. The heating wire 3 is embedded in the inner peripheral surface of the spherical shell-shaped receptacle 2 at a predetermined interval, and both ends of the heating wire 3 are the pins 22 of the connector 21 provided on the outer surface of the spherical shell-shaped receptacle 2. Connected. In addition, a spherical core 4 is rotatably fitted in the spherical shell-shaped receptacle 2, and a through hole 41 into which the end of the connected pipe 5 is fitted is provided in the spherical core 4. The heating wire 3 is embedded in a spiral shape at a predetermined interval on the inner peripheral surface of the through hole 41, and both ends of the heating wire 3 are provided on the outer surface of the cylindrical portion 42 extending from the spherical core 4 and the connector 43 is provided. It is connected to the pin 44 of.

【００１３】この自在継手Ａ２に被接続管５を接続する
場合、球状コア４の貫通孔４１に被接続管５の端部を嵌
挿し、被接続管５の接続角度を適宜調整してから所定の
位置にセットする。そこで、球殻状受口２の外面に設け
たコネクター２１と、球状コア４の円筒部４２の外面に
設けたコネクター４３に電力線を接続し、それぞれの電
熱線３に所定時間電流を通して電熱線３を発熱させる。
すると、球殻状受口２の内周面と球状コア４の外周面と
が溶融して融着接合し、また球状コア４の貫通孔４１と
被接続管５の端部外周面とが溶融して融着接合する。When connecting the connected pipe 5 to the universal joint A2, the end portion of the connected pipe 5 is fitted into the through hole 41 of the spherical core 4 and the connection angle of the connected pipe 5 is adjusted appropriately, and then predetermined. Set to the position. Therefore, a power line is connected to the connector 21 provided on the outer surface of the spherical shell-shaped receptacle 2 and the connector 43 provided on the outer surface of the cylindrical portion 42 of the spherical core 4, and a current is passed through each of the heating wires 3 for a predetermined time period. Heat up.
Then, the inner peripheral surface of the spherical shell-shaped port 2 and the outer peripheral surface of the spherical core 4 are melted and fusion-bonded to each other, and the through hole 41 of the spherical core 4 and the outer peripheral surface of the end portion of the connected pipe 5 are melted. And fusion bonding.

【００１４】図３に示した自在継手Ａ３は、ポリエチレ
ン等の合成樹脂からなる継手１と、一端部に拡径受口４
６を有する球状コア４とからなるものである。継手１は
前記実施例１で説明した継手１と同様な構成からなって
いるのでその説明を省略する。球状コア４は肉厚がほぼ
一定に形成されており、該球状コア４から延出した短管
４５の端部には拡径受口４６が設けられている。拡径受
口４６の内周面には電熱線３が所定間隔で埋設されてお
り、該電熱線３の両端部は拡径受口４６の外面に設けら
れたコネクター４７のピン４８と接続している。A universal joint A3 shown in FIG. 3 has a joint 1 made of a synthetic resin such as polyethylene and an enlarged diameter receiving port 4 at one end.
6 and a spherical core 4 having Since the joint 1 has the same structure as the joint 1 described in the first embodiment, its description is omitted. The spherical core 4 is formed to have a substantially constant wall thickness, and an enlarged diameter receiving port 46 is provided at the end of the short tube 45 extending from the spherical core 4. The heating wire 3 is embedded at a predetermined interval on the inner peripheral surface of the expanded diameter receiving port 46, and both ends of the heating wire 3 are connected to the pins 48 of the connector 47 provided on the outer surface of the expanded diameter receiving port 46. ing.

【００１５】この自在継手Ａ３に被接続管を接続する場
合、継手１の拡径受口７と、球状コア４の拡径受口４６
にそれぞれ被接続管の端部を嵌挿し、被接続管の接続角
度を適宜調整してから所定の位置にセットする。そこ
で、拡径受口７、４６の内周面に埋設した電熱線３に通
電して発熱させると、それぞれの受口内周面と被接続管
の端部外周面とが溶融して融着接合する。When a pipe to be connected is connected to the universal joint A3, the diameter expansion receiving port 7 of the joint 1 and the diameter expansion receiving port 46 of the spherical core 4 are connected.
The end portions of the pipes to be connected are fitted and inserted into them, the connection angles of the pipes to be connected are adjusted appropriately, and then the pipes are set to predetermined positions. Therefore, when the heating wire 3 buried in the inner peripheral surfaces of the expanded diameter receiving ports 7 and 46 is energized to generate heat, the inner peripheral surface of each receiving port and the outer peripheral surface of the end portion of the connected pipe are melted and fusion bonded. To do.

【００１６】[0016]

【発明の効果】以上詳述した如く、本発明の自在継手
は、被接続管の接続角度を適宜調整できるので、現場で
の配管施工の際に既設配管等の障害物が存在しても、こ
れを避けて被接続管を簡単に接続することができる。ま
た、この自在継手に被接続管を接続してから、球殻状受
口の内周面に埋設した電熱線に通電するだけで球殻状受
口の内周面と球状コアの外周面とを一体的に融着接合で
きるので、管内流体の漏洩を確実に防止することができ
る。As described above in detail, in the universal joint of the present invention, since the connection angle of the pipe to be connected can be adjusted appropriately, even if there is an obstacle such as an existing pipe at the time of pipe construction on site, This can be avoided and the pipes to be connected can be easily connected. In addition, after connecting the pipe to be connected to this universal joint, it is possible to connect the inner peripheral surface of the spherical shell-shaped receiving port and the outer peripheral surface of the spherical core simply by energizing the heating wire embedded in the inner peripheral surface of the spherical shell-shaped receiving port. Since they can be integrally fused and joined together, it is possible to reliably prevent the fluid in the pipe from leaking.

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

【図１】図１は、本発明の一実施例を示す自在継手の縦
断面図である。FIG. 1 is a vertical sectional view of a universal joint according to an embodiment of the present invention.

【図２】図２は、本発明の他の実施例を示す自在継手の
縦断面図である。FIG. 2 is a vertical sectional view of a universal joint according to another embodiment of the present invention.

【図３】図３は、更に本発明の他の実施例を示す自在継
手の縦断面図である。FIG. 3 is a vertical sectional view of a universal joint according to still another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

Ａ１ 自在継手 Ａ２ 自在継手 Ａ３ 自在継手 １ 合成樹脂製管または継手 ２ 球殻状受口 ３ 電熱線 ４ 球状コア A1 universal joint A2 universal joint A3 universal joint 1 synthetic resin pipe or joint 2 spherical shell shaped receptacle 3 heating wire 4 spherical core

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 合成樹脂製管または継手（１）の端部に
球状内面を有する球殻状受口（２）を設け、該受口
（２）の内周面に電熱線（３）を所定間隔で埋設すると
共に, 該受口（２）内に球状コア（４）を回動自在に嵌
合させたことを特徴とする電熱線を内蔵した自在継手。1. A synthetic resin pipe or joint (1) is provided with a spherical shell-shaped receiving port (2) having a spherical inner surface, and a heating wire (3) is provided on the inner peripheral surface of the receiving port (2). A universal joint having a built-in heating wire, wherein the universal joint is embedded at a predetermined interval and a spherical core (4) is rotatably fitted in the receiving port (2).
JP4043340A 1992-02-28 1992-02-28 Universal joint with built-in heating wire Pending JPH05240394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4043340A JPH05240394A (en) 1992-02-28 1992-02-28 Universal joint with built-in heating wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4043340A JPH05240394A (en) 1992-02-28 1992-02-28 Universal joint with built-in heating wire

Publications (1)

Publication Number Publication Date
JPH05240394A true JPH05240394A (en) 1993-09-17

Family

ID=12661117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4043340A Pending JPH05240394A (en) 1992-02-28 1992-02-28 Universal joint with built-in heating wire

Country Status (1)

Country Link
JP (1) JPH05240394A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003029717A1 (en) * 2001-10-04 2003-04-10 Petrotechnik Limited Improved couplings
JP2003130278A (en) * 2001-10-30 2003-05-08 Kubota Corp Electric fusion universal joint
EP1597508A2 (en) * 2003-02-23 2005-11-23 PLASSON Ltd Electrofusion coupling particularly useful for coupling plastic pipes
DE102006057212A1 (en) * 2006-12-01 2008-06-19 Da-Kunststoff Gmbh Device for connecting two pipes
CN103423543A (en) * 2013-07-04 2013-12-04 余姚市河姆渡庆发实业有限公司 Universal-movement PE (polyethylene) combination electric hot molten pipe fitting and molding technology thereof
CN114248198A (en) * 2021-11-29 2022-03-29 广东鸿凯智能科技有限公司 Connecting piece for grinding machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003029717A1 (en) * 2001-10-04 2003-04-10 Petrotechnik Limited Improved couplings
US7490861B2 (en) 2001-10-04 2009-02-17 Petro Technik, Ltd. Couplings
JP2003130278A (en) * 2001-10-30 2003-05-08 Kubota Corp Electric fusion universal joint
EP1597508A2 (en) * 2003-02-23 2005-11-23 PLASSON Ltd Electrofusion coupling particularly useful for coupling plastic pipes
EP1597508A4 (en) * 2003-02-23 2007-04-25 Plasson Ltd Electrofusion coupling particularly useful for coupling plastic pipes
DE102006057212A1 (en) * 2006-12-01 2008-06-19 Da-Kunststoff Gmbh Device for connecting two pipes
CN103423543A (en) * 2013-07-04 2013-12-04 余姚市河姆渡庆发实业有限公司 Universal-movement PE (polyethylene) combination electric hot molten pipe fitting and molding technology thereof
CN114248198A (en) * 2021-11-29 2022-03-29 广东鸿凯智能科技有限公司 Connecting piece for grinding machine

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