JPH04290697A - Surface treatment for conductive wire - Google Patents

Surface treatment for conductive wire

Info

Publication number
JPH04290697A
JPH04290697A JP3052573A JP5257391A JPH04290697A JP H04290697 A JPH04290697 A JP H04290697A JP 3052573 A JP3052573 A JP 3052573A JP 5257391 A JP5257391 A JP 5257391A JP H04290697 A JPH04290697 A JP H04290697A
Authority
JP
Japan
Prior art keywords
conductive wire
nickel layer
layer
nickel
surface treatment
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
JP3052573A
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 JP3052573A priority Critical patent/JPH04290697A/en
Publication of JPH04290697A publication Critical patent/JPH04290697A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining 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"
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining 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"
    • B29C65/3472Joining 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
    • B29C65/3476Joining 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
    • B29C65/348Joining 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 with a polymer coating

Abstract

PURPOSE:To prevent the short circuit of a conductive wire when a thermoplastic resin pipe is welded by a welding coupling, by using a conductive wire which is insulation-treated by heating and oxidizing a Ni layer formed on the surface, as the welding coupling. CONSTITUTION:A Ni layer is formed on the surface of a conductive wire used for a welding coupling, and the Ni layer is heated and oxidized. Vapor deposition is adopted as the method for forming the Ni layer on the surface of the conductive wire, and the heating and oxidation processes for the Ni layer is carried out by blowing oxygen on the conductive wire. Since the oxidized film which is formed on the surface of the conductive wire by the surface treatment is formed after the sufficient advance of the chemical reaction between Ni and oxygen, the generation of exfoliation is suppressed, and the superior insulation performance can be obtained.

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、溶着継手に使用する導
電線の表面処理方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for surface treatment of conductive wires used in welded joints.

【0002】0002

【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、この継手本体の内周部を旋回して導電線が埋設
され、前記継手本体の外周部に、前記導電線を接続した
一対の端子が設けられた溶着継手と呼ばれるものがある
。この溶着継手は、継手本体に熱可塑性樹脂間を差し込
んだ状態で端子間に所定の電圧をかけて通電させ、導電
線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(特公昭63−24820号公報参照)。
[Prior Art] A joint has a joint body made of thermoplastic resin, a conductive wire is embedded in the joint body by turning around the inner circumference of the joint body, and the conductive wire is connected to the outer circumference of the joint body. There is something called a welded joint that has a pair of terminals. This welded joint is made by inserting the thermoplastic resin into the joint body and applying a predetermined voltage between the terminals to generate heat in the conductive wire, thereby connecting the inner circumference of the joint body and the outer circumference of the thermoplastic resin pipe The parts are melted and welded together (see Japanese Patent Publication No. 63-24820).

【0003】0003

【発明が解決しようとする課題】ところで、溶着継手は
、熱可塑性樹脂管を溶着する際に樹脂が溶融して体積膨
張するので、溶融樹脂の移動に伴って導電線も移動し、
隣接する導電線同士が接触する場合がある。このように
隣接する導電線同士が接触すると短絡が生じ急激に導電
線を流れる電流が増大する。この結果、導電線は異常に
発熱し、継手本体の樹脂が過度に加熱され、そのことに
よって熱可塑性樹脂管を溶着した後の溶着継手の品質及
び性能が低下するという問題があった。
[Problems to be Solved by the Invention] In a welded joint, when thermoplastic resin pipes are welded, the resin melts and expands in volume, so as the molten resin moves, the conductive wire also moves.
Adjacent conductive wires may come into contact with each other. When adjacent conductive wires come into contact with each other in this way, a short circuit occurs and the current flowing through the conductive wires suddenly increases. As a result, the conductive wire generates abnormal heat, and the resin of the joint body is excessively heated, which causes a problem in that the quality and performance of the welded joint after welding the thermoplastic resin pipes deteriorates.

【0004】本発明は、上記従来の問題に着目し、熱可
塑性樹脂管を溶着する際に導電線が短絡しないようにす
ることを目的としている。
The present invention has focused on the above-mentioned conventional problems, and aims to prevent conductive wires from short-circuiting when welding thermoplastic resin pipes.

【0005】[0005]

【課題を解決するための手段】本発明は、溶着継手に使
用する導電線の表面を絶縁処理することにより上記目的
を達成しようとするもので、その導電線の表面処理方法
は、溶着継手に使用する導電線の表面を絶縁処理する方
法であって、導電線の表面にニッケル層を形成し、その
後、該ニッケル層を加熱して酸化させる方法である。 尚、導電線の表面にニッケル層を形成する手段としては
、蒸着等がある。また、ニッケル層を加熱する場合、導
電線に酸素を吹き付けながらニッケル層を加熱すると、
ニッケル層の酸化を進行させることができて好ましい。
[Means for Solving the Problems] The present invention attempts to achieve the above object by insulating the surface of a conductive wire used in a welded joint. This is a method of insulating the surface of a conductive wire to be used, in which a nickel layer is formed on the surface of the conductive wire, and then the nickel layer is heated and oxidized. Note that vapor deposition and the like can be used as a means for forming a nickel layer on the surface of the conductive wire. Also, when heating the nickel layer, if you heat the nickel layer while blowing oxygen onto the conductive wire,
This is preferable because it allows the oxidation of the nickel layer to proceed.

【0006】[0006]

【作用】本発明の表面処理方法は、予め導電線の表面に
ニッケル層を形成してからニッケル層を加熱して酸化さ
せる方法なので、この表面処理によって導電線の表面に
形成された酸化皮膜は、ニッケルと酸素との化学反応が
十分に進行した結果形成されたものであるので、剥離が
生じ難く絶縁性に優れている。
[Operation] The surface treatment method of the present invention is a method in which a nickel layer is formed on the surface of the conductive wire in advance and then the nickel layer is heated and oxidized. Since it is formed as a result of a sufficient chemical reaction between nickel and oxygen, it is difficult to peel off and has excellent insulation properties.

【0007】[0007]

【実施例】以下、本発明実施例の表面処理方法について
説明する。尚、本実施例方法により表面処理できる導電
線としては、ニクロム線、鉄クロム合金線、銅線、銅ニ
ッケル合金線、鉄ニッケル合金線、マンガン線、銅ニッ
ケルマンガン合金線、ニッケルクロム合金線、クロメル
線等の一般抵抗用線材がある。そして導電線は一本の線
材からなるものであってもよいし、細い線材を複数束ね
たものであってもよい。
[Example] Below, a surface treatment method according to an example of the present invention will be explained. The conductive wires that can be surface-treated by the method of this embodiment include nichrome wire, iron-chromium alloy wire, copper wire, copper-nickel alloy wire, iron-nickel alloy wire, manganese wire, copper-nickel-manganese alloy wire, nickel-chromium alloy wire, There are general resistance wire materials such as chromel wire. The conductive wire may be made of a single wire, or may be made of a plurality of thin wires bundled together.

【0008】まず、第1実施例の表面処理方法を説明す
る。本実施例の表面処理方法は、まず、約700〜80
0℃に加熱した導電線の表面に真空蒸着槽内で蒸着によ
りニッケル層を形成する。それから、導電線に酸素を吹
き付けながらそのニッケル層を700〜1000℃まで
加熱して酸化させる。そうすると、導電線の表面に、絶
縁性に優れた酸化皮膜を形成することができる。尚、ニ
ッケル層は、導電線の線径が太い程厚く形成することが
望ましいが、その厚さは5〜20μの範囲内において設
定するのが好ましい。
First, the surface treatment method of the first embodiment will be explained. In the surface treatment method of this example, first, about 700 to 800
A nickel layer is formed on the surface of the conductive wire heated to 0° C. by vapor deposition in a vacuum vapor deposition tank. Then, the nickel layer is heated to 700-1000° C. while blowing oxygen onto the conductive wire to oxidize it. In this way, an oxide film with excellent insulation properties can be formed on the surface of the conductive wire. The nickel layer is desirably formed to be thicker as the diameter of the conductive wire becomes larger, but the thickness is preferably set within the range of 5 to 20 microns.

【0009】次に、第2実施例の表面処理方法を説明す
る。本実施例方法は、まず、約700〜800℃に加熱
した導電線の表面に真空蒸着槽内で蒸着によりニッケル
層を形成する。それから、そのニッケル層を酸素の吹き
付けなしに700〜1000℃まで加熱して酸化させる
。そうすると、導電線の表面に絶縁性に優れた酸化皮膜
を形成することができる。尚、ニッケル層の厚さを設定
する場合の好適な範囲は第1実施例と同様である。
Next, the surface treatment method of the second embodiment will be explained. In the method of this embodiment, first, a nickel layer is formed by vapor deposition on the surface of a conductive wire heated to about 700 to 800° C. in a vacuum vapor deposition tank. The nickel layer is then heated to 700-1000° C. without oxygen blowing to oxidize it. In this way, an oxide film with excellent insulation properties can be formed on the surface of the conductive wire. Note that the preferred range for setting the thickness of the nickel layer is the same as in the first embodiment.

【0010】次に、第3実施例の表面処理方法を説明す
る。本実施例方法は、まず導電線の表面を酸洗(例えば
5%濃度の塩酸を使用する。)し、次にアルカリで中和
させ、その後、ニッケルメッキ浴槽に導電線を浸漬して
導電線の表面にニッケル層を形成する。それから、導電
線に酸素を吹き付けながらそのニッケル層を700〜1
000℃まで加熱して酸化させる。そうすると、導電線
の表面に絶縁性に優れた酸化皮膜を形成することができ
る。尚、ニッケル層は、導電線の線径が太い程厚く形成
することが望ましいが、その厚さは10〜30μの範囲
内において設定するのが好ましい。
Next, the surface treatment method of the third embodiment will be explained. In the method of this embodiment, the surface of the conductive wire is first pickled (for example, using 5% hydrochloric acid), then neutralized with alkali, and then the conductive wire is immersed in a nickel plating bath. Form a nickel layer on the surface. Then, while blowing oxygen onto the conductive wire, the nickel layer is
Heat to 000°C to oxidize. In this way, an oxide film with excellent insulation properties can be formed on the surface of the conductive wire. The nickel layer is desirably formed to be thicker as the diameter of the conductive wire becomes larger, but the thickness is preferably set within the range of 10 to 30 microns.

【0011】次に、第4実施例の表面処理方法を説明す
る。本実施例方法は、まず導電線の表面を酸洗(例えば
5%濃度の塩酸を使用する。)し、次にアルカリで中和
させ、その後、ニッケルメッキ浴槽に導電線を浸漬して
導電線の表面にニッケル層を形成する。それから、その
ニッケル層を酸素の吹き付けなしに700〜1000℃
まで加熱して酸化させる。そうすると、導電線の表面に
絶縁性に優れた酸化皮膜を形成することができる。尚、
ニッケル層の厚さを設定する場合の好適な範囲は第3実
施例と同様である。
Next, the surface treatment method of the fourth embodiment will be explained. In the method of this embodiment, the surface of the conductive wire is first pickled (for example, using 5% hydrochloric acid), then neutralized with alkali, and then the conductive wire is immersed in a nickel plating bath. Form a nickel layer on the surface. Then, the nickel layer was heated to 700-1000℃ without oxygen blowing.
Heat to oxidize. In this way, an oxide film with excellent insulation properties can be formed on the surface of the conductive wire. still,
The preferred range for setting the thickness of the nickel layer is the same as in the third embodiment.

【0012】以上、第1実施例〜第4実施例の表面処理
方法は、予め導電線の表面にニッケル層を形成してから
ニッケル層を加熱して酸化させる方法なので、この表面
処理によって導電線の表面に形成された酸化皮膜は、ニ
ッケルと酸素との化学反応が十分に進行した結果形成さ
れたものであるので、剥離が生じ難く絶縁性に優れてい
る。従って、本実施例方法で表面処理した導電線は、通
電中に導電線が二箇所で接触してもそれが短絡にならな
いので、溶着継手への使用に適している。
As described above, the surface treatment methods of the first to fourth embodiments are methods in which a nickel layer is formed on the surface of the conductive wire in advance and then the nickel layer is heated and oxidized. The oxide film formed on the surface is formed as a result of a sufficient chemical reaction between nickel and oxygen, so it is difficult to peel off and has excellent insulation properties. Therefore, the conductive wire surface-treated by the method of this embodiment is suitable for use in welded joints because even if the conductive wire comes into contact at two places during energization, it will not cause a short circuit.

【0013】また、第1実施例及び第3実施例の表面処
理方法では、ニッケル層を加熱する際、導電線に酸素を
吹き付けながらニッケル層を加熱するので、ニッケルと
酸素との化学反応、即ちニッケル層の酸化を更に進行さ
せることができ、絶縁性に優れた酸化皮膜を短時間で確
実に形成することができる。尚、導電線に酸素を吹き付
けながらニッケル層を加熱する場合には、線径が0.7
mm以上の導電線を対象にした方が好ましい。
Furthermore, in the surface treatment methods of the first and third embodiments, when heating the nickel layer, the nickel layer is heated while blowing oxygen onto the conductive wire, so that a chemical reaction between nickel and oxygen occurs, that is, a chemical reaction between nickel and oxygen occurs. Oxidation of the nickel layer can be further progressed, and an oxide film with excellent insulation properties can be reliably formed in a short time. In addition, when heating the nickel layer while blowing oxygen to the conductive wire, the wire diameter is 0.7
It is preferable to target conductive wires with a diameter of mm or more.

【0014】また、ニッケル含有率が15%,10%,
5%と異なる3種類の銅ニッケル合金線(以下、CN1
5,CN10,CN5で記載する)がある場合、その表
面処理は、ニッケル層の固着性を考慮すると、CN15
に対しては第1実施例あるいは第2実施例の方法を適用
するのが望ましく、CN10,CN5に対しては第3実
施例あるいは第4実施例の方法を適用するのが望ましい
[0014] Further, the nickel content is 15%, 10%,
Three types of copper-nickel alloy wires (hereinafter referred to as CN1) different from 5%
5, CN10, CN5), the surface treatment should be CN15, considering the adhesion of the nickel layer.
For CN10 and CN5, it is desirable to apply the method of the first embodiment or the second embodiment, and for CN10 and CN5, it is desirable to apply the method of the third or fourth embodiment.

【0015】更に、線径が小さい導電線を対象にする場
合には、第3実施例あるいは第4実施例の方法を適用す
るのが望ましい。それは、メッキ浴浸漬により導電線の
表面にニッケル層を形成するよりも、蒸着により導電線
の表面にニッケル層を形成する方法の方が厚さにムラで
き難いからである。
Furthermore, when dealing with conductive wires having a small wire diameter, it is desirable to apply the method of the third or fourth embodiment. This is because the method of forming a nickel layer on the surface of the conductive wire by vapor deposition is less likely to cause uneven thickness than the method of forming the nickel layer on the surface of the conductive wire by immersion in a plating bath.

【0016】ちなみに、ニッケル含有率の低い導電線(
ニッケル含有率15%以下)をそのまま加熱してニッケ
ルと酸素を化学反応させようとしたところ、ニッケルと
酸素との化学反応が十分進行しないため、ニッケルと酸
素の化学反応により形成される酸化皮膜が剥離を生じ易
く、十分な絶縁効果が得られないという結果となった。 特に、導電線の径が太いと絶縁皮膜が部分的にしか形成
されず絶縁性が低いものになる。それに対し、本実施例
方法は、ニッケルの含有率が低く線径が太い導電線の表
面処理にも適しているといえる。
Incidentally, a conductive wire with a low nickel content (
When attempting to cause a chemical reaction between nickel and oxygen by heating the nickel (nickel content: 15% or less) as it is, the chemical reaction between nickel and oxygen did not proceed sufficiently, so the oxide film formed by the chemical reaction between nickel and oxygen The result was that peeling was likely to occur and a sufficient insulating effect could not be obtained. In particular, if the diameter of the conductive wire is large, the insulation film will be formed only partially, resulting in poor insulation. On the other hand, the method of this embodiment can be said to be suitable for surface treatment of conductive wires with a low nickel content and a large wire diameter.

【0017】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における方法の
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 the method may be changed without departing from the gist of the present invention. are also included in the present invention.

【0018】[0018]

【発明の効果】以上説明したように、本発明の導電線の
表面処理方法にあっては、導電線の表面に絶縁性に優れ
たニッケルの酸化皮膜を形成することができる。従って
、通電中に隣接する導電線同士が接触してもそれが短絡
にならないので、溶着継手への使用に適しているという
効果が得られる。
As explained above, in the method for surface treatment of a conductive wire according to the present invention, a nickel oxide film having excellent insulation properties can be formed on the surface of a conductive wire. Therefore, even if adjacent conductive wires come into contact with each other during energization, this will not cause a short circuit, making it suitable for use in welded joints.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】  溶着継手に使用する導電線の表面を絶
縁処理する方法であって、導電線の表面にニッケル層を
形成し、その後、該ニッケル層を加熱して酸化させるこ
とを特徴とする導電線の表面処理方法。
1. A method for insulating the surface of a conductive wire used in a welded joint, characterized by forming a nickel layer on the surface of the conductive wire, and then heating and oxidizing the nickel layer. Surface treatment method for conductive wire.
【請求項2】  導電線の表面にニッケル層を形成する
手段として蒸着を採用する請求項1記載の導電線の表面
処理方法。
2. The method for surface treatment of a conductive wire according to claim 1, wherein vapor deposition is employed as a means for forming the nickel layer on the surface of the conductive wire.
【請求項3】  ニッケル層を加熱して酸化させる作業
を導電線に酸素を吹き付けながら行なう請求項1または
2記載の導電線の表面処理方法。
3. The method for surface treatment of a conductive wire according to claim 1, wherein the operation of heating and oxidizing the nickel layer is carried out while blowing oxygen onto the conductive wire.
JP3052573A 1991-03-18 1991-03-18 Surface treatment for conductive wire Pending JPH04290697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3052573A JPH04290697A (en) 1991-03-18 1991-03-18 Surface treatment for conductive wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3052573A JPH04290697A (en) 1991-03-18 1991-03-18 Surface treatment for conductive wire

Publications (1)

Publication Number Publication Date
JPH04290697A true JPH04290697A (en) 1992-10-15

Family

ID=12918554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3052573A Pending JPH04290697A (en) 1991-03-18 1991-03-18 Surface treatment for conductive wire

Country Status (1)

Country Link
JP (1) JPH04290697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014199774A1 (en) * 2013-06-11 2014-12-18 株式会社シンク・ラボラトリー Fully automated production system for gravure cylinder and production method for gravure cylinder employing same
JPWO2014199774A1 (en) * 2013-06-11 2017-02-23 株式会社シンク・ラボラトリー Gravure cylinder fully automatic manufacturing system and gravure cylinder manufacturing method using the same

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