JPH0441224A - Welding joint - Google Patents

Welding joint

Info

Publication number
JPH0441224A
JPH0441224A JP2149152A JP14915290A JPH0441224A JP H0441224 A JPH0441224 A JP H0441224A JP 2149152 A JP2149152 A JP 2149152A JP 14915290 A JP14915290 A JP 14915290A JP H0441224 A JPH0441224 A JP H0441224A
Authority
JP
Japan
Prior art keywords
terminals
recess
terminal
indicator
thermoplastic resin
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
JP2149152A
Other languages
Japanese (ja)
Inventor
Shinsuke Masuda
増田　伸介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP2149152A priority Critical patent/JPH0441224A/en
Publication of JPH0441224A publication Critical patent/JPH0441224A/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
    • 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
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • 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
    • B29C66/972—Checking completion of joining or correct joining by using indications on at least one of the joined parts by extrusion of molten material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials

Landscapes

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

Abstract

PURPOSE:To prevent a welding mistake by supplying a current in such a state that the connecter of a controller is inserted in a recessed part for a terminal without mistake by arranging the terminals connected to both terminals of a heating elements to the recessed parts for the terminals formed to the outer peripheral part of a heating element embedded part and forming recessed part for an indicator so as to pierce the terminals. CONSTITUTION:Both thermoplastic resin pipes P1, P2 are inserted in a welding joint up to a projection 13 from both opening ends 11, 12 thereof and the connector 5 of a controller is inserted in a recessed part 3 for terminals 4 and constant voltage is applied across the terminals 4 to supply a current to heat a conductor 2. The inner peripheral part of a joint main body 1 and the outer peripheral parts of the thermoplastic resin pipes P1, P2 are melted by the heat from the conductor and a part of the molten resin penetrates in a recessed part 42 for an indicator by the pressure due to thermal expansion to be extruded from the upper end of the recessed part 42 for the indicator. The penetrating resin is observed from the upper ends of the terminals 4 to make it possible to confirm the welding of the inner peripheral part of the joint main body 1 and the outer peripheral parts of the thermoplastic resin pipes P1, P2.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、熱可塑性樹脂製のガス管や水道管等の溶着接
合に用いられる溶着継手に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a welding joint used for welding and joining thermoplastic resin gas pipes, water pipes, and the like.

（従来の技術） 継手には、継手本体が熱可塑性樹脂で形成され、加熱要
素が前記継手本体の内周部に設けられ、前記加熱要素の
両端と接続した端子が、前記継手本体の外周部に形成さ
れた端子用凹部に配設されている溶着継手とよばれるも
のがある。この溶着継手は、継手本体に熱可塑性樹脂管
を差し込んだ状態で端子間に電圧をかけて通電させ、加
熱要素を発熱させることにより、継手本体の内周部と熱
可塑性樹脂管の外周部が溶融して互いに溶着するように
なっている。(Prior Art) In a joint, a joint body is formed of thermoplastic resin, a heating element is provided on the inner circumference of the joint body, and terminals connected to both ends of the heating element are provided on the outer circumference of the joint body. There is a type of welded joint that is installed in a terminal recess formed in a terminal. This welded joint is made by inserting a thermoplastic resin pipe into the joint body and applying a voltage between the terminals to generate heat in the heating element, so that the inner circumference of the joint body and the outer circumference of the thermoplastic resin pipe are connected. They are designed to melt and weld together.

更に、このような溶着継手には、例えば、特公昭６３−
２４８２０号公報に記載されているように、継手本体の
外周部にインジケーター用凹部が形成されているものが
ある。Furthermore, for such welded joints, for example,
As described in Japanese Patent No. 24820, there is a joint body in which an indicator recess is formed on the outer circumference of the joint body.

前記インジケーター用凹部は、継手本体の加熱要素埋設
領域内に形成され、加熱により継手本体が所定の溶融状
態となると、熱膨張による圧力で、溶融樹脂の一部が凹
部内に浸入するようになっている。従って、この浸入樹
脂を観察して、継手本体と熱可塑性樹脂管の溶着を確認
することができるようになっている。The indicator recess is formed within the heating element embedding region of the joint body, and when the joint body reaches a predetermined molten state by heating, a portion of the molten resin infiltrates into the recess due to pressure due to thermal expansion. ing. Therefore, by observing this infiltrated resin, it is possible to confirm the welding of the joint body and the thermoplastic resin pipe.

（発明が解決しようとする課題） しかしながら、このような従来の溶着継手にあっては、
継手本体の外周部に、端子用凹部とインジケーター用凹
部とが設けられているために、端子間に電圧をかけて通
電させる際に、端子用凹部に差し込むべきコントローラ
ーのコネクタを、誤ってインジケーター用凹部に差し込
んでしまう場合がある。そのような場合には、継手本体
と熱可塑性樹脂管の溶着が成されていないという問題が
生じる。(Problem to be solved by the invention) However, in such conventional welded joints,
Since a recess for the terminal and a recess for the indicator are provided on the outer periphery of the joint body, when applying voltage between the terminals to energize, the controller connector that should be inserted into the recess for the terminal may be accidentally inserted into the recess for the indicator. It may get inserted into the recess. In such a case, a problem arises in that the joint body and the thermoplastic resin pipe are not welded together.

本発明は、上記従来の問題に着目し、コントローラのコ
ネクタを間違いなく端子用凹部に差し込んで通電するこ
とができる溶着継手を提供することを目的としている。The present invention has focused on the above-mentioned conventional problems, and an object of the present invention is to provide a welding joint that allows a connector of a controller to be inserted into a terminal recess without fail and to be energized.

（課題を解決するだめの手段） 本発明は、上述のような課題を解決することを目的とし
たもので、この目的達成のために、本発明の溶着継手は
、継手本体が熱可塑性樹脂で形成され、加熱要素が前記
継手本体の内周部に埋設され、前記加熱要素の両端と接
続した端子が、前記加熱要素埋設領域の外周部に形成さ
れた端子用凹部に配設され、インジケーター用凹部が、
前記端子を貫通して形成されているものである。(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems, and in order to achieve this purpose, the welded joint of the present invention has a joint body made of thermoplastic resin. A heating element is formed, a heating element is buried in the inner circumference of the joint body, and terminals connected to both ends of the heating element are disposed in a terminal recess formed in the outer circumference of the heating element embedding area, and a terminal for an indicator is formed. The recess is
It is formed to penetrate the terminal.

（作　用） 本発明の溶着継手では、加熱要素の両端と接続した端子
が、前記加熱要素埋設領域の外周部に形成された端子用
凹部に配設され、インジケーター用凹部が、前記端子を
貫通して形成されているので、コントローラーのコネク
タを間違いなく端子用凹部に差し込んで通電することが
できる。(Function) In the welded joint of the present invention, the terminals connected to both ends of the heating element are disposed in the terminal recess formed on the outer periphery of the heating element buried area, and the indicator recess passes through the terminal. The controller connector can be inserted into the terminal recess without fail and the power can be turned on.

また、加熱要素の発熱により、継手本体の内周部及び継
手本体に差し込んだ熱可塑性樹脂管の外周部が溶融する
と、熱膨張による圧力で溶融樹脂の一部がインジケータ
ー用凹部に浸入するようになっている。従って、端子の
上端からインジケーター用凹部内に浸入し５た浸入樹脂
を観察して、継手本体の内周部と熱可塑性樹脂管の外周
部の溶着を確認することができる。In addition, when the inner circumference of the joint body and the outer circumference of the thermoplastic resin pipe inserted into the joint body melt due to the heat generated by the heating element, a portion of the molten resin will enter the indicator recess due to the pressure caused by thermal expansion. It has become. Therefore, by observing the infiltrated resin that has entered the indicator recess from the upper end of the terminal, it is possible to confirm the welding of the inner peripheral part of the joint body and the outer peripheral part of the thermoplastic resin pipe.

（実施例） 以下、本発明の実施例を図面により詳述する。(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

尚、実施例を説明するにあたり、ソケット状の溶着継手
を例にとる。In describing the embodiment, a socket-shaped welded joint will be taken as an example.

まず、第１図及び第２図に基づいて、実施例の構成を説
明する。First, the configuration of the embodiment will be explained based on FIGS. 1 and 2.

第１図は本発明実施例の溶着継手を示す縦断面図、第２
図は第１図の要部■を示す拡大断面図である。Fig. 1 is a longitudinal sectional view showing a welded joint according to an embodiment of the present invention;
The figure is an enlarged sectional view showing the main part (2) of FIG. 1.

本実施例の溶着継手は、第１図に示すように、継手本体
１が円筒状に形成され、該継手本体１の開口端１１．１
２に、熱可塑性樹脂管Ｐｉ、Ｐ２の端部が挿入状態で溶
着接合されるソケット状の溶着継手である。As shown in FIG. 1, the welded joint of this embodiment has a joint body 1 formed in a cylindrical shape, and an open end 11.1 of the joint body 1.
2 is a socket-shaped welding joint in which the ends of the thermoplastic resin pipes Pi and P2 are welded and joined in an inserted state.

前記継手本体１は、ポリプロピレン樹脂、ポリエチレン
樹脂、塩化ビニル樹脂、ポリブテン樹脂等の熱可塑性樹
脂を素材として、例えば射出成形により形成されており
、内面には、軸方向略中央部に、両開口端１１．１２か
ら挿入した熱可塑性樹脂管Ｐｉ、Ｐ２の挿入を所定位置
で規制するための突起１３が環状に形成されている。The joint body 1 is made of thermoplastic resin such as polypropylene resin, polyethylene resin, vinyl chloride resin, polybutene resin, etc., and is formed by, for example, injection molding. A protrusion 13 is formed in an annular shape to restrict insertion of the thermoplastic resin pipes Pi and P2 inserted from 11 and 12 at a predetermined position.

また、図中２は加熱要素として設けられた導電線で、こ
の導電線３は、ニクロム線、銅・ニッケル合金線、マン
ガン・ニッケル合金線、クロメル線、鉄クロム線等の一
本の一般抵抗用線材で、継手本体１の内周部に螺旋状に
埋設されている。また、前記導電線２は、継手本体１の
突起１３を中心として、一方の開口端１１から挿入する
熱可塑性樹脂管Ｐ１との溶着用の第１群２１と、他方の
開口端１２から挿入する熱可塑性樹脂管Ｐ２との溶着用
の第２群２２とに分割して設けられている。In addition, 2 in the figure is a conductive wire provided as a heating element, and this conductive wire 3 is a general resistance wire such as a nichrome wire, a copper-nickel alloy wire, a manganese-nickel alloy wire, a chromel wire, an iron-chrome wire, etc. This wire rod is embedded in the inner peripheral part of the joint body 1 in a spiral shape. Further, the conductive wires 2 are inserted into a first group 21 for welding with the thermoplastic resin pipe P1, which is inserted from one open end 11, and inserted from the other open end 12, centering on the protrusion 13 of the joint body 1. A second group 22 for welding to the thermoplastic resin pipe P2 is provided separately.

また、図中３は端子用凹部で、前記導電線２の第１群２
１と第２群２２の各埋設領域外周部に形成されている。In addition, 3 in the figure is a recess for a terminal, and the first group 2 of the conductive wires 2
They are formed on the outer periphery of each of the buried areas of the first and second groups 22.

また、前記端子用凹部３の内部には、主として真鍮や砲
金、銅等の低抵抗材料で形成された端子４が内蔵されて
おり、この端子４は、前記導電線２の両端と接続されて
いる。尚、図中４１は、導電線２との接続用の溝で、導
電線２の両端部は、この溝４１に保持されている。Further, a terminal 4 mainly made of a low resistance material such as brass, gunmetal, or copper is built inside the terminal recess 3, and the terminal 4 is connected to both ends of the conductive wire 2. There is. Note that 41 in the figure is a groove for connection with the conductive wire 2, and both ends of the conductive wire 2 are held in this groove 41.

更に、前記端子４は、筒状体で形成されており、前記端
子４の内部がインジケーター用凹部４２となっている。Further, the terminal 4 is formed of a cylindrical body, and the inside of the terminal 4 is an indicator recess 42.

即ち、インジケーター用凹部４２は、端子４を貫通して
形成されている。尚、インジケーター用凹部４２には、
継手本体１の成形時に、熱可塑性樹脂が充填されている
。That is, the indicator recess 42 is formed to penetrate the terminal 4. Note that the indicator recess 42 has
When the joint body 1 is molded, it is filled with thermoplastic resin.

次に、実施例の作用を説明する。Next, the operation of the embodiment will be explained.

本実施例の溶着継手に熱可塑性樹脂管ＰＩ、　　Ｐ２を
接続する場合、まず、側熱可塑性樹脂管Ｐ１、Ｐ２を突
起１３により規制されるまで、それぞれ両開口端１１．
１２から挿入する。When connecting the thermoplastic resin pipes PI and P2 to the welded joint of this embodiment, first, the side thermoplastic resin pipes P1 and P2 are connected to both open ends 11 .
Insert from 12.

次に、端子用凹部３に二点鎖線で示したようなコントロ
ーラのコネクタ５を差し込んで、端子４．４間に一定電
圧をかけて通電させ、導電線２を発熱させる。そして、
その熱で継手本体１の内周部及び熱可塑性樹脂管ＰＩ、
Ｐ２の外周部を溶融させる。継手本体１の内周部及び熱
可塑性樹脂管Ｐｉ、Ｐ２の外周部が溶融すると、熱膨張
による圧力で溶融樹脂の一部が、インジケーター用凹部
４２に浸入し、インジケーター用凹部４２の上端から溶
融樹脂が押し出される。即ち、作業者は、端子４の上端
から浸入樹脂を観察して継手本体１の内周部と熱可塑性
樹脂管ＰＩ、Ｐ２の外周部の溶着を確認することができ
る。Next, the connector 5 of the controller as shown by the two-dot chain line is inserted into the terminal recess 3, and a constant voltage is applied between the terminals 4 and 4 to energize, causing the conductive wire 2 to generate heat. and,
The heat causes the inner peripheral part of the joint body 1 and the thermoplastic resin pipe PI to
The outer periphery of P2 is melted. When the inner peripheral part of the joint body 1 and the outer peripheral parts of the thermoplastic resin pipes Pi and P2 melt, a part of the molten resin enters the indicator recess 42 due to pressure due to thermal expansion, and melts from the upper end of the indicator recess 42. The resin is extruded. That is, the operator can observe the infiltrated resin from the upper end of the terminal 4 and confirm the welding between the inner peripheral part of the joint body 1 and the outer peripheral parts of the thermoplastic resin pipes PI and P2.

つまり、本実施例の溶着継手は、端子用凹部３が導電線
２の第１群２１と第２群２２の各埋設領域外周部に形成
され、インジケーター用凹部４２が、前記端子用凹部３
に配設された端子４を貫通して形成されているので、コ
ントローラーのコネクタ５を間違いなく端子用凹部３に
差し込んで通電できる。尚、コネクタ５は、端子用凹部
３に差し込んだ際、インジケーター用凹部４２をのぞき
こんで浸入樹脂が見えるよう、端子４の上端面からの突
出高さｈが、２〜３ｍｍ以内であることが望ましい。ま
た、コネクタ５の上端に、アクリル゛樹脂やＡＢＳ樹脂
等の透明板５１を設け、この透明板５１を通してインジ
ケーター用凹部４２内を観察できるようにすると共に、
この透明板５１に、圧電スイッチ等の接触型センサーあ
るいは温度センサーを設けて、溶融樹脂が所定量以上イ
ン１ジケータ−用凹部４２から押し出されると、通電が
停止されるようにしてもよい。That is, in the welded joint of this embodiment, the terminal recess 3 is formed at the outer periphery of each of the buried areas of the first group 21 and the second group 22 of the conductive wires 2, and the indicator recess 42 is formed in the terminal recess 3.
The connector 5 of the controller can be inserted into the terminal recess 3 and energized without fail. In addition, when the connector 5 is inserted into the terminal recess 3, it is desirable that the protrusion height h from the upper end surface of the terminal 4 is within 2 to 3 mm so that the infiltrated resin can be seen by looking into the indicator recess 42. . Further, a transparent plate 51 made of acrylic resin, ABS resin, etc. is provided at the upper end of the connector 5, and the interior of the indicator recess 42 can be observed through this transparent plate 51.
This transparent plate 51 may be provided with a contact type sensor such as a piezoelectric switch or a temperature sensor so that when a predetermined amount or more of the molten resin is pushed out of the indicator recess 42, the electricity supply is stopped.

第３図及び第４図は、端子の変形例を示しており、第３
図に示した端子４ａは、下端部に、導電線２を通す穴４
３が形成されており、第４図に示した端子４ｂは、外周
面に、導電線２を保持する７字形溝４４が形成されてい
る。Figures 3 and 4 show modified examples of the terminal.
The terminal 4a shown in the figure has a hole 4 at the lower end through which the conductive wire 2 is passed.
3 is formed, and the terminal 4b shown in FIG. 4 has a 7-shaped groove 44 for holding the conductive wire 2 formed on the outer peripheral surface.

以上、本発明の実施例を図面により詳述してきたが、具
体的な構成はこの実施例に限られるものではなく本発明
の要旨を逸脱しない範囲の設計変更等があっても本発明
に含まれる。Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are design changes within the scope of the gist of the present invention, they are included in the present invention. It will be done.

例えば、実施例では、ソケット形状の溶着継手に適用し
た例を示したが、分岐継手やエルボ、チーズ、レジュー
サ等、形状の異なる溶着継手に適用してもよい。For example, in the embodiment, an example is shown in which the present invention is applied to a socket-shaped welded joint, but it may also be applied to welded joints of different shapes, such as a branch joint, an elbow, a cheese, and a reducer.

また、加熱要素は、本質的なものではなく、例えば、多
数の細い長尺の炭素繊維が束ねられた加熱抵抗線であっ
てもよい。また、長さが１０〜２００ｍｍのニクロム線
や炭素繊維等の導電性繊維がシート状に抄造されたもの
であってもよい。Further, the heating element is not essential, and may be, for example, a heating resistance wire in which a large number of thin and long carbon fibers are bundled. Further, conductive fibers such as nichrome wires and carbon fibers having a length of 10 to 200 mm may be formed into a sheet.

更に、実施例では、予め、インジケーター用凹部内に熱
可塑性樹脂が充填されており、加熱時に溶融樹脂がイン
ジケーター用凹部の上端から押し出される構造にしたが
、インジケーター用凹部は、加熱前において、全体が中
空状態であってもよいし、中程部まで熱可塑性樹脂が充
填されている状態であってもよい。要するに、加熱時に
、溶融樹脂がインジケーター用凹部に浸入している様子
が、インジケーター用凹部の上端から観察できればよい
。Furthermore, in the example, the thermoplastic resin is filled in the indicator recess in advance, and the molten resin is pushed out from the upper end of the indicator recess when heated. may be in a hollow state, or may be in a state in which the thermoplastic resin is filled up to the middle part. In short, it is sufficient if the molten resin entering the indicator recess can be observed from the upper end of the indicator recess during heating.

（発明の効果） 以上説明してきたように、本発明の溶着継手は、端子用
凹部が加熱要素埋設領域の外周部に形成され、インジケ
ーター用凹部が、前記端子用凹部に配設された端子を貫
通して形成されているので、コントローラーのコネクタ
を間違いなく端子用凹部に差し込んで通電することがで
き、溶着ミスを防止できるという効果が得られる。(Effects of the Invention) As described above, in the welded joint of the present invention, the terminal recess is formed on the outer periphery of the heating element embedding region, and the indicator recess is configured to hold the terminal disposed in the terminal recess. Since it is formed to be penetrating, the connector of the controller can be inserted into the terminal recess without fail and energized, and welding errors can be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明実施例の溶着継手を示す縦断面図、第２
図は第１図の要部■を示す拡大断面図、第３図及び第４
図は端子の変形例を示す断面図である。 １・・・継手本体 ２・・・導電線（加熱要素） ３・・・端子用凹部 ４・・・端子 ４２−・インジケーター用凹部Fig. 1 is a longitudinal sectional view showing a welded joint according to an embodiment of the present invention;
The figure is an enlarged sectional view showing the main part of Figure 1, Figures 3 and 4.
The figure is a sectional view showing a modified example of the terminal. 1... Joint body 2... Conductive wire (heating element) 3... Recess for terminal 4... Recess for terminal 42-/indicator

Claims (1)

【特許請求の範囲】[Claims] １）継手本体が熱可塑性樹脂で形成され、加熱要素が前
記継手本体の内周部に埋設され、前記加熱要素の両端と
接続した端子が、前記加熱要素埋設領域の外周部に形成
された端子用凹部に配設され、インジケーター用凹部が
、前記端子を貫通して形成されていることを特徴とする
溶着継手。1) The joint body is formed of thermoplastic resin, the heating element is embedded in the inner circumference of the joint body, and the terminals connected to both ends of the heating element are formed on the outer circumference of the heating element embedding area. A welded joint, characterized in that the indicator recess is disposed in the indicator recess and is formed to penetrate the terminal.
JP2149152A 1990-06-06 1990-06-06 Welding joint Pending JPH0441224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2149152A JPH0441224A (en) 1990-06-06 1990-06-06 Welding joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2149152A JPH0441224A (en) 1990-06-06 1990-06-06 Welding joint

Publications (1)

Publication Number Publication Date
JPH0441224A true JPH0441224A (en) 1992-02-12

Family

ID=15468921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2149152A Pending JPH0441224A (en) 1990-06-06 1990-06-06 Welding joint

Country Status (1)

Country Link
JP (1) JPH0441224A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009097657A (en) * 2007-10-18 2009-05-07 Hitachi Metals Ltd Electrical fusion plug and tube end processing method
JP2009144864A (en) * 2007-12-17 2009-07-02 Aoi:Kk One-touch fitting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009097657A (en) * 2007-10-18 2009-05-07 Hitachi Metals Ltd Electrical fusion plug and tube end processing method
JP2009144864A (en) * 2007-12-17 2009-07-02 Aoi:Kk One-touch fitting

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