JPH07117132A - Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube - Google Patents

Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube

Info

Publication number
JPH07117132A
JPH07117132A JP5265231A JP26523193A JPH07117132A JP H07117132 A JPH07117132 A JP H07117132A JP 5265231 A JP5265231 A JP 5265231A JP 26523193 A JP26523193 A JP 26523193A JP H07117132 A JPH07117132 A JP H07117132A
Authority
JP
Japan
Prior art keywords
tube
corrugated
rib
corrugated pipe
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
JP5265231A
Other languages
Japanese (ja)
Inventor
Kazuhiko Iwata
一彦 岩田
Yasuo Watanabe
泰夫 渡邊
Masaya Iwasaki
雅也 岩崎
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP5265231A priority Critical patent/JPH07117132A/en
Publication of JPH07117132A publication Critical patent/JPH07117132A/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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces 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"
    • B29C65/36—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" heated by induction
    • B29C65/3604—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" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3608—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" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3612—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" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4855—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by their physical properties, e.g. being electrically-conductive
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5064—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped
    • B29C65/5071—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like of particular form, e.g. being C-shaped, T-shaped and being composed by one single element
    • 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
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—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
    • B29C66/63—Internally supporting the article during joining
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/725—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 structure of the material of the parts to be joined being hollow-walled or honeycombs
    • B29C66/7252—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 structure of the material of the parts to be joined being hollow-walled or honeycombs hollow-walled
    • 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"
    • B29C65/36—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" heated by induction
    • B29C65/3672—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" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—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" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—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" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/18—Pleated or corrugated hoses
    • B29L2023/186—Pleated or corrugated hoses having a smooth internal wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00—Articles with hollow walls
    • B29L2024/003—Articles with hollow walls comprising corrugated cores

Landscapes

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

Abstract

PURPOSE:To easily manufacture a tube, easily and assuredly connect corrugated pipes by only heating for a fixed time regardless of the size of the pipe, in a method wherein connection of corrugated pipes is performed by heating and fusing a tube to be inserted into a corrugated rib of butted corrugated pipes. CONSTITUTION:A tube 1 molded by extruding a thermoplastic or thermosetting resin which contains ferrite powder mixed therein is cut by a corrugated rib, which is inserted in the corrugated rib of butted corrugated pipes by covering the whole periphery in a state crushed flatly. Thereafter, a joint part of the corrugated pipes is fixed by clamps applied from the inside and the outside. Thereafter, 1-400kHz of alternating field is generated by an induction heating device 4 so as to heat the tube 1. Thus, the circular form of the tube 1 is restored and melted, and adhered with pressure to the corrugated rib of the corrugated pipes 2 and an inner wall so as to fuse.

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、可撓性を有するプラス
チック材料からなるコルゲート管の接続のために用いら
れる自己熱融着性を有するチューブ及び該チューブを用
いたコルゲート管の接続方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-heat-bonding tube used for connecting a corrugated tube made of a flexible plastic material and a method for connecting a corrugated tube using the tube.

【０００２】[0002]

【従来技術】可撓性を有するプラスチック材料からなる
コルゲート管は、軽量で、しかも耐圧性及び可撓性を有
することから、雨水や排水等の下水道管、下水道管とし
て既設のヒューム管を補修するためのライニング材、ダ
ムの送水管として用いられるヒューム管のライニング材
等各種の用途に用いられている。2. Description of the Related Art Corrugated pipes made of a flexible plastic material are lightweight and have pressure resistance and flexibility, and therefore repair existing sewer pipes such as rainwater and drainage and existing fume pipes as sewer pipes. It is used for various purposes such as lining materials for water, lining materials for fume pipes used as dam water pipes.

【０００３】この種のコルゲート管を接続する際には従
来、金属製や成形品よりなる継手を用い、これをコルゲ
ート管に差込んだり、嵌込むことによって連結してお
り、水密性を要するときには、継手とコルゲート管との
間にパッキンを介在させていた。コルゲート管の接続方
法としてはこのほか、特公表平１−５０１５６２号に示
されるように、電熱線を巻付けた長円形断面の架橋ポリ
エチレンのチューブを用い、これを接続されるコルゲー
ト管の切断された波形リブの重合わせ部分より波形リブ
内に挿入して一定時間給電し、架橋ポリエチレンのチュ
ーブを加熱することにより円形に復元させて波形リブと
内壁とに圧着させ、融着する方法が知られる。この方法
によれば、前者の継手を用いた方法に比べ、コルゲート
管の接続作業を容易かつ迅速に行うことができて作業能
率が向上し、しかもシール性のある管の連結を比較的確
実に行うことができる。また架橋ポリエチレンのチュー
ブの外側に非架橋ポリエチレン層を設けた二層チューブ
も提案されている（特開昭）。Conventionally, when connecting a corrugated pipe of this kind, a joint made of metal or a molded product is used, and the corrugated pipe is connected by inserting or fitting the joint, and when watertightness is required. The packing was interposed between the joint and the corrugated pipe. As another method for connecting the corrugated pipe, as shown in Japanese Patent Publication No. 1-501562, a cross-linked polyethylene tube having an elliptical cross section wound with a heating wire is used, and the corrugated pipe to be connected is cut. A method is known in which the corrugated ribs are inserted into the corrugated ribs and supplied with electric power for a certain period of time, the cross-linked polyethylene tube is heated to restore the circular shape, and the corrugated ribs and the inner wall are crimped and fused. . According to this method, as compared with the former method using a joint, the corrugated pipe connection work can be performed easily and quickly, the work efficiency is improved, and moreover, the connection of the pipes with sealing property is relatively reliable. It can be carried out. A two-layer tube in which a non-crosslinked polyethylene layer is provided on the outside of a crosslinked polyethylene tube has also been proposed (Japanese Patent Laid-Open Publication No. Sho.

【０００４】[0004]

【発明が解決しようとする課題】本発明は、上述する従
来の架橋ポリエチレンのチューブよりも製造がより簡単
で、しかも管のサイズの如何にかゝわらず、発熱量のコ
ントロールが容易な自己熱融着性を有するコルゲート管
接続用のチューブ及び該チューブを用いたコルゲート管
の接続方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention is self-heating which is easier to manufacture than the conventional cross-linked polyethylene tubes described above, and whose calorific value is easy to control regardless of the size of the tubes. An object of the present invention is to provide a tube for connecting a corrugated tube having a fusion property and a method for connecting a corrugated tube using the tube.

【０００５】[0005]

【課題の解決手段】本発明に係るコルゲート管接続用の
チューブは、酸化鉄粉、フェライト粉或いはこれらの混
合物より選択された磁性粉又は樹脂の溶融温度範囲内に
キュリー点を有する金属粉よりなる導電性材料を熱可塑
性樹脂に混入したことを特徴とするものであり、別のチ
ューブは、上述の磁性粉又は導電性材料（以下単に磁性
粉等という）を混入した発熱材を外周部に設けたことを
特徴とするものである。A tube for connecting a corrugated tube according to the present invention comprises a magnetic powder selected from iron oxide powder, ferrite powder or a mixture thereof, or a metal powder having a Curie point within the melting temperature range of a resin. Another tube is characterized in that a conductive material is mixed with a thermoplastic resin, and another tube is provided with a heat generating material mixed with the above-mentioned magnetic powder or conductive material (hereinafter simply referred to as magnetic powder) on the outer peripheral portion. It is characterized by that.

【０００６】更に別のチューブは、上記磁性粉等を混入
した樹脂、或いは発熱材の代わりに誘導損失係数の高い
樹脂を用いることを特徴とするものである。上記チュー
ブを用いたコルゲート管の接続方法は、接続されるコル
ゲート管により形成される波形リブの切断部分より波形
リブ内に上記チューブを挿入したのち、高周波発生装置
と電極コア及び励磁コイルで構成された誘導加熱装置を
用いて１〜５００ＫＨｚの交番磁界を発生させることに
より、或いはマイクロ波を照射することにより、上記チ
ューブを発熱させ、波形リブと内壁とに熱融着すること
を特徴とするものである。Still another tube is characterized by using a resin mixed with the magnetic powder or the like, or a resin having a high induction loss coefficient instead of the heat generating material. The corrugated tube connecting method using the tube is configured by inserting the tube into the corrugated rib from the cut portion of the corrugated rib formed by the corrugated tube to be connected, and then including the high frequency generator, the electrode core and the exciting coil. By generating an alternating magnetic field of 1 to 500 KHz using the above induction heating device or by irradiating with a microwave, the tube is heated to heat-bond to the corrugated rib and the inner wall. Is.

【０００７】[0007]

【作用】誘導加熱装置を用いて交番磁界を発生させたと
き、チューブの磁性粉等が磁気ヒステリシス損失によっ
て発熱し、またマイクロ波を当てることにより誘導損失
係数の高い樹脂が発熱する。本発明のチューブないし発
熱材に用いられる磁性粉等の混合割合は、磁性粉等の保
磁力Ｈｃ５０〜２００Ｏｅの場合、磁性粉等が５０〜９
０重量％、好ましくは５０〜８５重量％である。この場
合、磁性粉等が５０重量％未満である場合には、最大磁
界密度Ｂｒが１０００Ｇ以上の発熱材が得られ難く、短
時間での発熱効果が低い。磁性粉等が９０重量％を越え
る場合には、磁性粉等の樹脂中への充填及び分散性が困
難となる。When an alternating magnetic field is generated using the induction heating device, the magnetic powder in the tube generates heat due to the magnetic hysteresis loss, and when microwaves are applied, the resin having a high induction loss coefficient also generates heat. The mixing ratio of the magnetic powder or the like used in the tube or the heat generating material of the present invention is 50 to 9 when the coercive force Hc of the magnetic powder or the like is 50 to 200 Oe.
It is 0% by weight, preferably 50 to 85% by weight. In this case, when the magnetic powder or the like is less than 50% by weight, it is difficult to obtain a heat generating material having a maximum magnetic field density Br of 1000 G or more, and the heat generating effect in a short time is low. When the magnetic powder or the like exceeds 90% by weight, it becomes difficult to fill and disperse the magnetic powder or the like in the resin.

【０００８】磁性粉等の保磁力Ｈｃが２００Ｏｅを越え
る場合の樹脂との混合割合は、磁性粉等が５０重量％未
満、好ましくは５〜３０重量％である。磁性粉等が５０
重量％を越えると、発熱効果が大き過ぎ、場合によって
は樹脂の劣化を招く可能性が大きい。有効な発熱を得る
ために必要な磁性粉等の量を考慮すれば、その下限値は
０、１重量％である。When the coercive force Hc of the magnetic powder or the like exceeds 200 Oe, the mixing ratio of the magnetic powder or the like with the resin is less than 50% by weight, preferably 5 to 30% by weight. 50 magnetic powder
When the content is more than the weight%, the heat generation effect is too large and the resin may be deteriorated in some cases. Considering the amount of magnetic powder and the like required to obtain effective heat generation, the lower limit value is 0, 1% by weight.

【０００９】本発明のチューブ或いは発熱材として用い
られる熱可塑性樹脂としては、ポリプロピレン、ポリエ
チレン等のポリオレフィン、ポリ塩化ビニール、ポリス
チレン、これらのコポリマー等が例示される。磁性粉等
を混入した樹脂よりなる発熱材は、絶縁性を有し、保磁
力Ｈｃが５０Ｏｅ以上、最大磁界密度ＢM が１０００Ｇ
以上、好ましくは１２００Ｇ以上である。Examples of the thermoplastic resin used as the tube or heat generating material of the present invention include polyolefins such as polypropylene and polyethylene, polyvinyl chloride, polystyrene, and copolymers thereof. The heat-generating material made of resin mixed with magnetic powder has an insulating property, a coercive force Hc of 50 Oe or more, and a maximum magnetic field density B M of 1000 G.
Or more, preferably 1200 G or more.

【００１０】保磁力Ｈｃが５０Ｏｅ未満であると、磁気
ヒステリシス損が小さ過ぎ、また発熱材の最大磁束密度
ＢM が１０００Ｇ未満である場合、または発熱材の残留
磁束密度Ｂｒ／保磁力Ｈｃが１．３未満である場合に
は、磁気ヒステリシス損が小さくなり、十分な発熱が得
られないことがある。従って、残留磁束密度Ｂｒ／保磁
力Ｈｃが１．３以上の磁性を有するものとすると、好結
果が得られることが多い。When the coercive force Hc is less than 50 Oe, the magnetic hysteresis loss is too small, and when the maximum magnetic flux density B M of the heat generating material is less than 1000 G, or the residual magnetic flux density Br / coercive force Hc of the heat generating material is 1 If it is less than 0.3, the magnetic hysteresis loss becomes small, and sufficient heat generation may not be obtained. Therefore, when the residual magnetic flux density Br / coercive force Hc has a magnetism of 1.3 or more, good results are often obtained.

【００１１】コルゲート管融着時の印加交番磁界は、磁
性体等が有する保持力の１〜１５倍程度とされる。印加
交番磁界は磁性体等が有する保磁力の１倍未満である
と、発熱効率が低下し、また１０倍を越える交番磁界を
印加しても、発熱効率にあまり影響がない。加熱の省エ
ネルギー化及び加熱装置の規模を考慮すると、２〜１０
倍程度、好ましくは５〜１０倍程度が望ましい。The applied alternating magnetic field during fusion of the corrugated tube is set to about 1 to 15 times the coercive force of the magnetic material or the like. When the applied alternating magnetic field is less than 1 time the coercive force of the magnetic substance, the heat generation efficiency is lowered, and even if an alternating magnetic field exceeding 10 times is applied, the heat generation efficiency is not significantly affected. Considering the energy saving of heating and the scale of the heating device, 2 to 10
About twice, preferably about 5 to 10 times is desirable.

【００１２】磁性粉等を混入した発熱材の代りに誘導損
失係数の高い樹脂を含有した発熱材を用いた場合、誘導
損失係数の高い樹脂としては、融点が１８０℃以上で、
誘導損失係数が０．１以上である樹脂が用いられ、その
混合割合は、３０〜６０重量％とされる。３０重量％未
満では、誘導電流による発熱が不十分であり、６０重量
％を越えると、曲げ加工後の強度が弱くなる。また融点
が１８０℃以上の樹脂を用いることにより樹脂の混練が
容易となる。When a heating material containing a resin having a high induction loss coefficient is used in place of the heating material mixed with magnetic powder or the like, a resin having a high induction loss coefficient has a melting point of 180 ° C. or higher,
A resin having an inductive loss coefficient of 0.1 or more is used, and the mixing ratio thereof is 30 to 60% by weight. If it is less than 30% by weight, the heat generated by the induced current is insufficient, and if it exceeds 60% by weight, the strength after bending becomes weak. Further, the use of a resin having a melting point of 180 ° C. or higher facilitates the kneading of the resin.

【００１３】誘導損失係数が０．１以上である樹脂とし
ては、例えば誘導損失係数が０．１であるナイロン６、
誘導損失係数が０．２であるフェノール樹脂等が例示さ
れる。As the resin having an inductive loss coefficient of 0.1 or more, for example, nylon 6 having an inductive loss coefficient of 0.1,
Examples include phenolic resins having an induction loss coefficient of 0.2.

【００１４】[0014]

【実施例】図１に示すように、コルゲート管２ａ、２ｂ
をそれぞれ波形リブ３で管軸と直交する方向に切断した
のち、図２に示すように、ポリオレフィンに磁性粉であ
るマグヘマイト粉を混入したものを押出成形して得られ
たチューブ１を用い、コルゲート管２ａ、２ｂの切断部
分を互いに突合わせるようにしてチューブ１を切断した
波形リブ３内に偏平に押し潰した状態で挿入する。つい
でコルゲート管２ａ、２ｂの継ぎ目部分を内側と外側よ
り当てがったクランク４で固定したのち、誘導加熱装置
５により、１〜４００ＫＨZの交番磁界を発生させてチ
ューブ１を発熱させる（図３）。これによりチューブ１
は断面円形に復元すると共に溶融し、コルゲート管２
ａ、２ｂの波形リブ３と内壁５とに圧着して融着する
（図４）。上述するチューブ１は一層構造のものでもよ
いが、好ましくは図示するように、内層が架橋ポリエチ
レン、外層が非架橋ポリエチレンよりなる二層構造のも
のが用いられる。EXAMPLE As shown in FIG. 1, corrugated pipes 2a, 2b.
Each of the corrugated ribs 3 was cut in a direction orthogonal to the tube axis, and then, as shown in FIG. 2, a tube 1 obtained by extruding a mixture of maghemite powder, which is magnetic powder, with polyolefin, was used. The tube 1 is inserted into the cut corrugated rib 3 in a flatly crushed state so that the cut portions of the tubes 2a and 2b abut each other. Then After fixed by the corrugated tube 2a, 2b crank 4 the joint portion was applied wanted than the inner and outer, by the induction heating device 5, thereby heating the tube 1 to generate an alternating magnetic field of 1~400KH Z (FIG. 3 ). This tube 1
Reverts to a circular cross section and melts, corrugated pipe 2
The corrugated ribs 3a and 2b and the inner wall 5 are pressure-bonded and fused (FIG. 4). The above-mentioned tube 1 may have a single-layer structure, but as shown in the figure, a double-layer structure having an inner layer made of crosslinked polyethylene and an outer layer made of non-crosslinked polyethylene is preferably used.

【００１５】[0015]

【発明の効果】本発明は以上のように構成され、次のよ
うな効果を奏する。請求項１記載のチューブによれば、
熱可塑性樹脂に磁性粉等を混入して成形するだけで、自
己熱融着性を有するコルゲート管接続用のチューブを簡
易に製造することができる。The present invention is constructed as described above and has the following effects. According to the tube of claim 1,
A tube for connecting a corrugated tube having a self-heat-bonding property can be easily manufactured only by mixing magnetic powder and the like into a thermoplastic resin and molding the mixture.

【００１６】請求項２記載のチューブにおいても、樹脂
に磁性粉等を混入した発熱材を外周部に設けるだけで、
自己熱融着性を有するコルゲート管接続用のチューブを
簡易に得ることができる。また請求項３記載のチューブ
のように、内層に熱変形温度の高い樹脂を用いれば、外
層部が溶融する温度においても、内層チューブの形状記
憶性すなわち、パイプ成形時の真円の形状に戻ろうとす
る性質を利用して、樹脂の融着に必要な圧力を確保する
ことができる。請求項５記載のチューブにおいても同
様、誘導損失係数の高い樹脂を含有させただけで、コル
ゲート管接続用のチューブを簡易に得ることができる。Also in the tube according to the second aspect, it is possible to provide a heat-generating material in which magnetic powder and the like are mixed in resin on the outer peripheral portion,
It is possible to easily obtain a tube for connecting a corrugated tube having a self-heat fusion property. When a resin having a high heat deformation temperature is used for the inner layer as in the tube according to claim 3, the inner layer tube returns to the shape memory property, that is, the shape of a perfect circle at the time of pipe molding, even at a temperature at which the outer layer portion melts. The pressure required for fusion bonding of the resin can be ensured by utilizing the property of trying. Similarly, in the tube according to the fifth aspect, a tube for connecting a corrugated tube can be easily obtained by only containing a resin having a high induction loss coefficient.

【００１７】請求項６記載の方法によれば、請求項１な
いし５記載のチューブを用い、これを波形リブ内に挿入
したのち、誘導加熱装置によりチューブを発熱させるこ
とにより、管のサイズの如何にかゝわらず、一定時間交
番磁界を発生させ、或いはマイクロ波を照射するだけ
で、簡単かつ確実にコルゲート管の接続を行うことがで
きる。According to the method described in claim 6, the tube according to any one of claims 1 to 5 is used, the tube is inserted into the corrugated rib, and then the tube is heated by an induction heating device to determine the size of the tube. However, the corrugated tube can be connected easily and surely only by generating the alternating magnetic field for a certain period of time or irradiating the microwave.

【００１８】請求項７記載の方法のように、チューブを
偏平にして波形リブ内に挿入させるようにすれば、挿入
が容易となり、また加熱により復元して波形リブや内壁
に圧着するようになる。When the tube is flattened and inserted into the corrugated rib as in the method according to the seventh aspect, the insertion is facilitated, and the tube is restored by heating to be crimped to the corrugated rib or the inner wall. .

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

【図１】 コルゲート管の切断部分を示す正面図。FIG. 1 is a front view showing a cut portion of a corrugated tube.

【図２】 切断したコルゲート管にチューブを挿入した
状態を示す要部断面図。FIG. 2 is a cross-sectional view of essential parts showing a state where a tube is inserted into a cut corrugated tube.

【図３】 コルゲート管の切断部分をクランプし、誘導
加熱装置により熱融着するときの要部断面図。FIG. 3 is a cross-sectional view of essential parts when a cut portion of a corrugated tube is clamped and heat-bonded by an induction heating device.

【図４】 熱融着を完了したコルゲート管の要部断面
図。FIG. 4 is a cross-sectional view of a main part of a corrugated tube that has completed heat fusion.

【符号の説明】 １・・・チューブ ２ａ、２ｂ・・
・コルゲート管 ３・・・波形リブ ４・・・誘導加
熱装置 ５・・・内壁[Explanation of symbols] 1 ... Tubes 2a, 2b ...
・ Corrugated tube 3 ・ ・ ・ Wavy rib 4 ・ ・ ・ Induction heating device 5 ・ ・ ・ Inner wall

Claims (7)

【特許請求の範囲】[Claims] 【請求項１】 酸化鉄粉、フェライト粉或いはこれらの
混合物より選択された磁性粉又は樹脂の溶融温度範囲内
にキュリー点を有する金属粉よりなる導電性材料を熱可
塑性樹脂に混入し、接続されるコルゲート管の波形リブ
の切断部分より波形リブ内に挿入されることを特徴とす
るコルゲート管接続用のチューブ。1. A conductive material made of a metal powder having a Curie point within the melting temperature range of a magnetic powder or a resin selected from iron oxide powder, ferrite powder or a mixture thereof is mixed with a thermoplastic resin to be connected. A tube for connecting a corrugated pipe, which is inserted into a corrugated rib from a cut portion of the corrugated rib of the corrugated pipe. 【請求項２】 酸化鉄粉、フェライト粉或いはこれらの
混合物より選択された磁性粉又は樹脂の溶融温度範囲内
にキュリー点を有する金属粉よりなる導電性材料を熱可
塑性樹脂に混入した発熱材を外周部に設け、接続される
コルゲート管の波形リブの切断部分より波形リブ内に挿
入されることを特徴とするコルゲート管接続用のチュー
ブ。2. A heat-generating material prepared by mixing a thermoplastic resin with a conductive material made of a metal powder having a Curie point within the melting temperature range of a magnetic powder or a resin selected from iron oxide powder, ferrite powder or a mixture thereof. A tube for connecting a corrugated pipe, which is provided on the outer peripheral portion and is inserted into the corrugated rib from a cut portion of the corrugated rib of the corrugated pipe to be connected. 【請求項３】 請求項１又は２記載のコルゲート管接続
用のチューブの内層に熱変形温度の高い樹脂を用いて二
層チューブとしたことを特徴とするコルゲート管接続用
のチューブ。3. A tube for connecting a corrugated tube, wherein the tube for connecting a corrugated tube according to claim 1 or 2 is made into a two-layer tube by using a resin having a high heat distortion temperature as an inner layer. 【請求項４】 請求項３記載のチューブの内層が架橋ポ
リエチレンであり、外層が非架橋ポリエチレンであるこ
とを特徴とするコルゲート管接続用のチューブ。4. A tube for connecting a corrugated pipe, wherein the inner layer of the tube according to claim 3 is crosslinked polyethylene and the outer layer is non-crosslinked polyethylene. 【請求項５】 磁性粉ないし導電性材料を混入した樹脂
の代わりに誘導損失係数の高い樹脂を用いる請求項１な
いし４のいづれかの請求項に記載のコルゲート管接続用
のチューブ。5. The tube for connecting a corrugated pipe according to claim 1, wherein a resin having a high induction loss coefficient is used in place of the resin mixed with magnetic powder or a conductive material. 【請求項６】 請求項１ないし５のいづれかの請求項に
記載のチューブを用い、これを接続されるコルゲート管
により形成される波形リブ内に挿入したのち、高周波発
生装置と電極コア及び電磁コイルで構成される誘導加熱
装置を用いて１〜５００ＫＨｚの交番磁界を発生させる
ことにより、或いはマイクロ波を照射することにより、
上記チューブを発熱させ、コルゲート管の波形リブと内
壁とに熱融着することを特徴とするコルゲート管の接続
方法。6. A high-frequency generator, an electrode core, and an electromagnetic coil after using the tube according to any one of claims 1 to 5 and inserting the tube into a corrugated rib formed by a corrugated tube connected to the tube. By generating an alternating magnetic field of 1 to 500 KHz using an induction heating device configured by, or by irradiating a microwave,
A method of connecting a corrugated tube, which comprises causing the tube to generate heat and heat-sealing the corrugated rib and the inner wall of the corrugated tube. 【請求項７】 チューブは、波形リブ内に偏平に押し潰
された状態で挿入される請求項６記載のコルゲート管の
接続方法。7. The method of connecting a corrugated pipe according to claim 6, wherein the tube is inserted into the corrugated rib in a flatly crushed state.
JP5265231A 1993-10-22 1993-10-22 Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube Pending JPH07117132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5265231A JPH07117132A (en) 1993-10-22 1993-10-22 Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5265231A JPH07117132A (en) 1993-10-22 1993-10-22 Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube

Publications (1)

Publication Number Publication Date
JPH07117132A true JPH07117132A (en) 1995-05-09

Family

ID=17414346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5265231A Pending JPH07117132A (en) 1993-10-22 1993-10-22 Corrugated pipe connecting tube and connecting method of corrugated pipe using the tube

Country Status (1)

Country Link
JP (1) JPH07117132A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277988A (en) * 1995-04-06 1996-10-22 C I Kasei Co Ltd Joining method for polyethylene resin pipe and joining structure thereof
EP1201403A2 (en) * 2000-10-31 2002-05-02 David Michael Anthony Kenworthy Electrofusible units
US6416830B2 (en) * 1996-08-26 2002-07-09 Tokin Corporation Composite magnetic tube and method of producing the same, and electromagnetic interference suppressing tube
JP2002219754A (en) * 2001-01-29 2002-08-06 Asahi Tec Corp Method for regenerating pipe line and regeneration material used in the method
JP2007071323A (en) * 2005-09-08 2007-03-22 Sekisui Chem Co Ltd Connecting method for corrugated pipe
JP2010159813A (en) * 2009-01-08 2010-07-22 Inoac Housing & Construction Materials Co Ltd Resin pipe with joint
WO2014208332A1 (en) * 2013-06-26 2014-12-31 オリンパスメディカルシステムズ株式会社 Spiral unit, insertion device, and spiral unit manufacturing method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08277988A (en) * 1995-04-06 1996-10-22 C I Kasei Co Ltd Joining method for polyethylene resin pipe and joining structure thereof
US6416830B2 (en) * 1996-08-26 2002-07-09 Tokin Corporation Composite magnetic tube and method of producing the same, and electromagnetic interference suppressing tube
EP1201403A2 (en) * 2000-10-31 2002-05-02 David Michael Anthony Kenworthy Electrofusible units
EP1201403A3 (en) * 2000-10-31 2003-01-29 David Michael Anthony Kenworthy Electrofusible units
JP2002219754A (en) * 2001-01-29 2002-08-06 Asahi Tec Corp Method for regenerating pipe line and regeneration material used in the method
JP2007071323A (en) * 2005-09-08 2007-03-22 Sekisui Chem Co Ltd Connecting method for corrugated pipe
JP2010159813A (en) * 2009-01-08 2010-07-22 Inoac Housing & Construction Materials Co Ltd Resin pipe with joint
WO2014208332A1 (en) * 2013-06-26 2014-12-31 オリンパスメディカルシステムズ株式会社 Spiral unit, insertion device, and spiral unit manufacturing method
US9538904B2 (en) 2013-06-26 2017-01-10 Olympus Corporation Spiral unit, insertion apparatus, and manufacturing method of spiral unit
EP3015049A4 (en) * 2013-06-26 2017-03-08 Olympus Corporation Spiral unit, insertion device, and spiral unit manufacturing method

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