JPH06349350A - Manufacture of copper-covered steel trolley wire - Google Patents

Abstract

PURPOSE:To provide the manufacture of a copper-covered steel trolley wire in which conductivity is high and the wear of a covered layer in the initial stage to expose a steel core by sliding of a pantograph is small. CONSTITUTION:A copper wire 1 made of copper or a copper alloy and a copper- covered steel wire 2 are combined in a lengthy direction, then they are drawn so as to have a specified cross section. A copper-covered trolley wire 5 obtained has a steel core 6 which is extremely eccentric to the lower side (friction side with the trolley wire).

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、鋼線の周囲に銅又は銅
合金を被覆して構成された銅被覆鋼トロリー線の製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a copper-coated steel trolley wire which is constructed by coating a steel wire with copper or a copper alloy.

【０００２】[0002]

【従来の技術】図５は、従来の銅被覆鋼トロリー線を示
す断面図である。この種の銅被覆鋼トロリー線は、断面
が円形の鋼芯１１の周囲に銅又は銅合金からなる被覆層
１２を同心円状に配置して構成されている。そして、被
覆層１２の上半部の両側には、架設時に銅製の取付具で
保持するための溝部（ハンガーイヤー部１３）が設けら
れている。2. Description of the Related Art FIG. 5 is a sectional view showing a conventional copper-coated steel trolley wire. This type of copper-coated steel trolley wire is constructed by concentrically arranging a coating layer 12 made of copper or a copper alloy around a steel core 11 having a circular cross section. Further, on both sides of the upper half of the coating layer 12, there are provided groove portions (hanger ear portions 13) for holding with a fixture made of copper during erection.

【０００３】銅被覆鋼トロリー線は、鋼芯の機械的強度
が高いため、銅又は銅合金のみからなるトロリー線に比
して引張強度が高いという長所がある。また、電車のパ
ンタグラフの摺動によりトロリー線が摩耗して鋼芯が露
出すると、パンタグラフが鋼芯に摺動するようになり、
トロリー線の摩耗が抑制される。従って、銅又は銅合金
のみからなるトロリー線に比して寿命が長いという長所
もある。更に、被覆層が銅又は銅合金からなるため、導
電性も比較的良好である。The copper-coated steel trolley wire has an advantage that the tensile strength is higher than that of a trolley wire made of only copper or copper alloy because the steel core has high mechanical strength. Also, when the trolley wire is worn and the steel core is exposed due to sliding of the pantograph of the train, the pantograph will slide on the steel core,
Wear of the trolley wire is suppressed. Therefore, it has an advantage that it has a longer life than a trolley wire made of only copper or a copper alloy. Further, since the coating layer is made of copper or copper alloy, the conductivity is relatively good.

【０００４】図６（ａ），（ｂ）は従来の銅被覆鋼トロ
リー線の製造方法を工程順に示す断面図である。先ず、
図６（ａ）に示すように、鋼芯１１の周囲に銅又は銅合
金からなる被覆層１２が同心円状に配置された銅被覆鋼
線１０を用意する。次いで、所定の形状のダイス面を備
えた複数個の伸線加工ダイスに銅被覆鋼線１０を順次通
して、所定の線径にまで細線化すると共に、図６（ｂ）
に示すように、被覆層１２の上半部の両側部に、長さ方
向に延びる溝部（ハンガーイヤー部１３）を形成する。
これにより、銅被覆鋼トロリー線が完成する。6 (a) and 6 (b) are sectional views showing a conventional method for manufacturing a copper-coated steel trolley wire in the order of steps. First,
As shown in FIG. 6A, a copper-coated steel wire 10 in which a coating layer 12 made of copper or a copper alloy is concentrically arranged around a steel core 11 is prepared. Next, the copper-coated steel wire 10 is sequentially passed through a plurality of wire drawing dies each having a die surface of a predetermined shape to thin the wire to a predetermined wire diameter, and FIG.
As shown in, a groove portion (hanger ear portion 13) extending in the length direction is formed on both side portions of the upper half portion of the coating layer 12.
This completes the copper-coated steel trolley wire.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上述し
た従来の銅被覆鋼トロリー線の製造方法には以下に示す
問題点がある。即ち、従来の方法により製造した銅被覆
鋼トロリー線は、図７に示すように、引張強度及び耐摩
耗性の向上に寄与する鋼芯１１がトロリー線の中心にあ
るため、パンタグラフによる摺動摩擦により鋼芯１１が
露出するまでの初期段階で鋼芯１１よりも下方の部分
（図中破線で示す部分）の銅又は銅合金が多量に摩耗し
てしまう。従って、高価な銅の浪費となるだけでなく、
この初期段階でトロリー線の導電率が著しく低下してし
まう。However, the above-mentioned conventional method for manufacturing a copper-coated steel trolley wire has the following problems. That is, in the copper-coated steel trolley wire manufactured by the conventional method, as shown in FIG. 7, since the steel core 11 that contributes to the improvement of the tensile strength and the wear resistance is at the center of the trolley wire, the sliding friction by the pantograph causes In the initial stage until the steel core 11 is exposed, a large amount of copper or a copper alloy in a portion below the steel core 11 (a portion indicated by a broken line in the figure) is worn. Therefore, not only is expensive copper wasted,
At this initial stage, the electrical conductivity of the trolley wire is significantly reduced.

【０００６】本発明はかかる問題点に鑑みてなされたも
のであって、導電性が良好であると共に、パンタグラフ
との摩擦面に鋼芯が露出するまでの初期段階での銅又は
銅合金の摩耗量が少ない銅被覆鋼トロリー線を製造でき
る銅被覆鋼トロリー線の製造方法を提供することを目的
とする。The present invention has been made in view of the above problems, and has good conductivity and wear of copper or copper alloy in the initial stage until the steel core is exposed on the friction surface with the pantograph. An object of the present invention is to provide a method for producing a copper-coated steel trolley wire that can produce a copper-coated steel trolley wire in a small amount.

【０００７】[0007]

【課題を解決するための手段】本発明に係る銅被覆鋼ト
ロリー線の製造方法は、銅又は銅合金からなる第１の線
材と、鋼線又は銅被覆鋼線からなる第２の線材とを、そ
の長手方向を一致させて合わせた状態で伸線加工を施し
所定の断面形状にする工程を有することを特徴とする。A method of manufacturing a copper-coated steel trolley wire according to the present invention comprises a first wire made of copper or a copper alloy and a second wire made of a steel wire or a copper-coated steel wire. It is characterized in that it has a step of drawing a wire in a state where the longitudinal directions thereof are matched and matched to each other to obtain a predetermined sectional shape.

【０００８】なお、本願において銅被覆鋼線とは、鋼芯
とこの鋼芯の周囲を被覆する銅又は銅合金からなる被覆
層とにより構成された線材をいう。In the present application, the term "copper-coated steel wire" refers to a wire material composed of a steel core and a coating layer made of copper or a copper alloy for coating the periphery of the steel core.

【０００９】[0009]

【作用】本発明方法においては、銅又は銅合金からなる
第１の線材と、鋼線又は銅被覆鋼線からなる第２の線材
とを、その長手方向を一致させて合わせた状態で伸線加
工を施し、所定の断面形状（トロリー線の形状）にす
る。前記伸線加工では、例えば複数個のダイスを使用し
て徐々に線材を縮径するが、その縮径の過程で前記第１
及び第２の線材は相互に密着しつつ変形して、１本のト
ロリー線になる。このようにして製造したトロリー線
は、鋼芯が一方向に著しく偏心して配置されている。即
ち、本発明方法によれば、鋼芯がパンタグラフとの摩擦
面側に著しく偏心しており、導電性が良好であると共に
パンタグラフとの摩擦面に鋼芯が露出するまでの初期段
階で摩耗する銅又は銅合金の量が少ない銅被覆鋼トロリ
ー線を製造することができる。In the method of the present invention, the first wire rod made of copper or copper alloy and the second wire rod made of steel wire or copper-coated steel wire are drawn in a state where their longitudinal directions are aligned with each other. It is processed into a predetermined sectional shape (trolley wire shape). In the wire drawing process, for example, a plurality of dies are used to gradually reduce the diameter of the wire rod.
The second wire rod and the second wire rod deform while being in close contact with each other to form a single trolley wire. In the trolley wire manufactured in this manner, the steel core is arranged so as to be significantly eccentric in one direction. That is, according to the method of the present invention, the steel core is significantly eccentric to the friction surface side with the pantograph, the conductivity is good and the copper core is worn in the initial stage until the steel core is exposed on the friction surface with the pantograph. Alternatively, a copper-coated steel trolley wire having a small amount of copper alloy can be manufactured.

【００１０】[0010]

【実施例】次に、本発明の実施例について添付の図面を
参照して説明する。図１（ａ）乃至（ｃ）は本発明の実
施例に係る銅被覆鋼トロリー線の製造方法を工程順に示
す断面図である。先ず、図１（ａ）に示すように、第１
及び第２の線材として、銅又は銅合金からなり断面が円
形の銅線１と、鋼芯３及びこの鋼芯３を被覆する銅又は
銅合金からなる被覆層４とにより構成された銅被覆鋼線
２とを用意する。そして、図１（ｂ）に示すように、銅
線１と銅被覆鋼線２とを長手方向を一致させて重ね合わ
せる。この場合に、図２に示すように、銅線１と銅被覆
鋼線２とを重ね合わせた状態で銅テープ９を巻き付け、
銅線１、銅被覆鋼線２及び銅テープ９の集合体としても
よい。Embodiments of the present invention will now be described with reference to the accompanying drawings. 1A to 1C are sectional views showing a method of manufacturing a copper-coated steel trolley wire according to an embodiment of the present invention in the order of steps. First, as shown in FIG.
And, as the second wire rod, a copper-coated steel composed of a copper wire 1 made of copper or a copper alloy and having a circular cross section, a steel core 3 and a coating layer 4 made of copper or a copper alloy for coating the steel core 3 Prepare line 2 and. Then, as shown in FIG. 1 (b), the copper wire 1 and the copper-coated steel wire 2 are superposed with their longitudinal directions aligned. In this case, as shown in FIG. 2, the copper tape 9 is wound in a state where the copper wire 1 and the copper-coated steel wire 2 are superposed,
It may be an assembly of the copper wire 1, the copper-coated steel wire 2 and the copper tape 9.

【００１１】次いで、銅線１及び銅被覆鋼線２を重ね合
わせた状態で複数のダイスに通し、伸線加工を施して断
面形状を段階的に変化させる。この伸線加工では、線材
を徐々に縮径するが、この縮径の過程で銅線１及び銅被
覆鋼線２が相互に密着しつつ変形して、図１（ｃ）に示
すように、被覆層７の上半部の両側部にハンガーイヤー
部８を有する所定形状の１本の銅被覆鋼トロリー線５と
なる。この銅被覆鋼トロリー線５は、鋼芯６が下部側
（パンタグラフとの摩擦面側）に著しく偏心しており、
鋼芯６の断面形状は略楕円形である。このようにして、
銅被覆鋼トロリー線の製造が完了する。Next, the copper wire 1 and the copper-coated steel wire 2 are passed through a plurality of dies in a state of being overlapped with each other, and wire drawing is performed to change the cross-sectional shape stepwise. In this wire drawing process, the wire material is gradually reduced in diameter, but in the process of this diameter reduction, the copper wire 1 and the copper-coated steel wire 2 are deformed while closely adhering to each other, as shown in FIG. The copper-coated steel trolley wire 5 has a predetermined shape and has hanger ear portions 8 on both sides of the upper half of the coating layer 7. In this copper-coated steel trolley wire 5, the steel core 6 is significantly eccentric to the lower side (friction surface side with the pantograph),
The sectional shape of the steel core 6 is substantially elliptical. In this way
Manufacture of copper-coated steel trolley wire is completed.

【００１２】本実施例方法により製造した銅被覆鋼トロ
リー線は、鋼芯がトロリー線の下部側に著しく偏心して
いるため、導電性が良好であると共にパンタグラフの摺
動により鋼芯が露出するまでの初期段階での被覆層の摩
耗量が少なく、導電率の低下を抑制することができる。
従って、本実施例方法により製造した銅被覆鋼トロリー
線は、従来の銅被覆鋼トロリー線に比して寿命が長いと
いう効果を得ることができる。The copper-coated steel trolley wire manufactured by the method of this embodiment has good conductivity because the steel core is significantly eccentric to the lower side of the trolley wire, and the steel core is exposed by sliding of the pantograph. The amount of wear of the coating layer at the initial stage of is small, and the decrease in conductivity can be suppressed.
Therefore, the copper-coated steel trolley wire manufactured by the method of the present embodiment has an effect of having a longer life than the conventional copper-coated steel trolley wire.

【００１３】次に、上述の実施例方法により実際に銅被
覆鋼トロリー線を製造し、鋼芯の偏心状態を調べた結果
について説明する。実施例１ 先ず、銅線１として直径が１０．０ｍｍのなまし銅線を
用意し、銅被覆鋼線２として直径が１０．０ｍｍ、鋼芯
３の直径が７．２ｍｍの銅被覆鋼線を用意した。そし
て、この２本の線材を図１（ｂ）に示すようにその長手
方向を一致させて合わせ、図２に示すように、厚さが
０．５ｍｍの銅テープをこれらの２本の線材の周囲に巻
き付けて、集合体とした。次いで、この集合体に伸線加
工を施し、図３に示す形状の銅被覆鋼トロリー線を製造
した。なお、伸線加工時における１パス当たりの平均減
面率は１０％である。Next, the result of actually manufacturing the copper-coated steel trolley wire by the method of the above-mentioned embodiment and examining the eccentricity of the steel core will be described. Example 1 First, an annealed copper wire having a diameter of 10.0 mm was prepared as the copper wire 1, and a copper-coated steel wire having a diameter of 10.0 mm and a steel core 3 having a diameter of 7.2 mm was prepared as the copper-coated steel wire 2. I prepared. Then, as shown in FIG. 1 (b), the two wires are aligned with each other in the longitudinal direction, and a copper tape having a thickness of 0.5 mm is attached to the two wires as shown in FIG. It was wrapped around to form an aggregate. Then, this assembly was subjected to wire drawing to manufacture a copper-coated steel trolley wire having a shape shown in FIG. The average area reduction rate per pass during wire drawing is 10%.

【００１４】このようにして製造した銅被覆鋼トロリー
線の各部の寸法を測定した。その結果、トロリー線の直
径ｄは１２．３４ｍｍ、断面積は１１０ｍｍ² 、トロリ
ー線下端から鋼芯までの距離ｘは０．６ｍｍ、鋼芯の高
さｈは６．０ｍｍ、トロリー線上端から鋼芯までの距離
ｙは５．７４ｍｍであった。このように、本実施例によ
り製造したトロリー線は、鋼芯がトロリー線下部側に著
しく偏心している。従って、パンタグラフの摺動により
鋼芯が露出するまでの初期段階での被覆層の摩耗が少な
い。また、この初期段階における導電率の低下も少な
く、良好な導電性を長期間に亘って維持することができ
る。従って、本実施例により製造した銅被覆鋼トロリー
線は、従来の銅被覆鋼トロリー線に比して、寿命がより
一層向上するという効果もある。The dimensions of each part of the copper-coated steel trolley wire manufactured in this manner were measured. As a result, the diameter d of the trolley wire was 12.34 mm, the cross-sectional area was 110 mm ² , the distance x from the lower end of the trolley wire to the steel core was 0.6 mm, the height h of the steel core was 6.0 mm, and the steel from the upper end of the trolley wire was steel. The distance y to the core was 5.74 mm. As described above, in the trolley wire manufactured according to this example, the steel core is significantly eccentric to the lower side of the trolley wire. Therefore, the abrasion of the coating layer at the initial stage until the steel core is exposed by sliding the pantograph is small. In addition, the conductivity is less likely to drop in this initial stage, and good conductivity can be maintained for a long period of time. Therefore, the copper-coated steel trolley wire manufactured according to this example also has an effect of further improving the life as compared with the conventional copper-coated steel trolley wire.

【００１５】なお、上述した実施例においては、第２の
線材として銅被覆鋼線を使用した場合について説明した
が、第２の線材として鋼線を使用した場合も、上述の実
施例と同様の効果を得ることができる。また、上述の実
施例においては第１及び第２の線材の断面形状がいずれ
も円形である場合について説明したが、これにより第１
及び第２の線材の断面形状が円形に限定されるものでは
ない。例えば、第１及び第２の線材として夫々断面形状
が半円形の銅線及び銅被覆鋼線（鋼芯の断面形状も半円
形）を使用すると、図４に示すように、鋼芯６ａが半円
形であり、上半部の銅被覆層７ａの厚さが厚い銅被覆鋼
トロリー線を製造することができる。このようにして製
造した銅被覆鋼トロリー線は、図３に示す銅被覆鋼トロ
リー線に比してより一層導電率が高いという長所があ
る。In the above-mentioned embodiment, the case where the copper-coated steel wire is used as the second wire rod has been described, but the case where the steel wire is used as the second wire rod is similar to the above-mentioned embodiment. The effect can be obtained. In addition, in the above-described embodiment, the case where the cross-sectional shapes of the first and second wire rods are both circular has been described.
The cross-sectional shape of the second wire is not limited to the circle. For example, when a copper wire having a semicircular cross section and a copper-coated steel wire (the cross sectional shape of the steel core is also semicircular) are used as the first and second wire rods, as shown in FIG. It is possible to manufacture a copper-coated steel trolley wire that is circular and has a thick upper half copper coating layer 7a. The copper-coated steel trolley wire manufactured in this manner has the advantage that it has a much higher conductivity than the copper-coated steel trolley wire shown in FIG.

【００１６】[0016]

【発明の効果】以上説明したように本発明方法において
は、銅又は銅合金からなる第１の線材と、鋼線又は銅被
覆鋼線からなる第２の線材とをその長手方向を一致させ
て合わせ、その状態で伸線加工を施して所定の断面形状
にするから、本発明方法により製造した銅被覆鋼トロリ
ー線は、鋼芯が一方の側に著しく偏心しており、導電性
が良好であると共にパンタグラフの摺動により鋼芯が露
出するまでの初期段階での被覆層の摩耗量が少なく、導
電率の低下を抑制することができる。従って、本発明方
法によれば、寿命が長いトロリー線を得ることができ
る。As described above, in the method of the present invention, the first wire made of copper or copper alloy and the second wire made of steel wire or copper-coated steel wire are aligned in the longitudinal direction. Combined, the wire drawing process in that state to give a predetermined cross-sectional shape, the copper-coated steel trolley wire produced by the method of the present invention, the steel core is significantly eccentric to one side, good conductivity At the same time, the amount of wear of the coating layer at the initial stage until the steel core is exposed by sliding the pantograph is small, and it is possible to suppress a decrease in conductivity. Therefore, according to the method of the present invention, a trolley wire having a long life can be obtained.

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

【図１】（ａ）乃至（ｃ）は本発明の実施例に係る銅被
覆鋼トロリー線の製造方法を工程順に示す模式図であ
る。1 (a) to 1 (c) are schematic diagrams showing a method of manufacturing a copper-coated steel trolley wire according to an embodiment of the present invention in the order of steps.

【図２】銅線及び銅被覆鋼線の周囲に銅テープを巻き付
けて集合体とした状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which a copper tape is wrapped around a copper wire and a copper-coated steel wire to form an assembly.

【図３】実施例方法により製造した銅被覆鋼トロリー線
を示す模式図である。FIG. 3 is a schematic diagram showing a copper-coated steel trolley wire manufactured by an example method.

【図４】鋼芯の断面形状が半円形の銅被覆鋼線を使用し
て本発明方法により製造した銅被覆鋼トロリー線を示す
断面図である。FIG. 4 is a cross-sectional view showing a copper-coated steel trolley wire manufactured by the method of the present invention using a copper-coated steel wire having a semi-circular cross section of a steel core.

【図５】従来の銅被覆鋼トロリー線の一例を示す断面図
である。FIG. 5 is a cross-sectional view showing an example of a conventional copper-coated steel trolley wire.

【図６】（ａ），（ｂ）は、従来の銅被覆鋼トロリー線
の製造方法を工程順に示す断面図である。6 (a) and 6 (b) are cross-sectional views showing a method of manufacturing a conventional copper-coated steel trolley wire in the order of steps.

【図７】従来のトロリー線の問題点を示す模式図であ
る。FIG. 7 is a schematic diagram showing a problem of a conventional trolley wire.

【符号の説明】[Explanation of symbols]

１；銅線 ２，１０；銅被覆鋼線 ３，６，６ａ，１１；鋼芯 ４，７，７ａ，１２；被覆層 ５；銅被覆鋼トロリー線 ８，１３；ハンガーイヤー部 ９；銅テープ 1; copper wire 2, 10; copper-coated steel wire 3, 6, 6a, 11; steel core 4, 7, 7a, 12; coating layer 5; copper-coated steel trolley wire 8, 13; hanger ear part 9; copper tape

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 銅又は銅合金からなる第１の線材と、鋼
線又は銅被覆鋼線からなる第２の線材とを、その長手方
向を一致させて合わせた状態で伸線加工を施し所定の断
面形状にする工程を有することを特徴とする銅被覆鋼ト
ロリー線の製造方法。1. A predetermined wire drawing process is performed in a state in which a first wire made of copper or a copper alloy and a second wire made of a steel wire or a copper-coated steel wire are aligned with their longitudinal directions aligned with each other. The method for producing a copper-coated steel trolley wire, comprising the step of forming the cross-sectional shape of the above.