JP6549852B2 - Trolley wire - Google Patents
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- JP6549852B2 JP6549852B2 JP2015020583A JP2015020583A JP6549852B2 JP 6549852 B2 JP6549852 B2 JP 6549852B2 JP 2015020583 A JP2015020583 A JP 2015020583A JP 2015020583 A JP2015020583 A JP 2015020583A JP 6549852 B2 JP6549852 B2 JP 6549852B2
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Description
本発明は、トロリ線に関し、特に、ヘビーシンプル架線に好適なトロリ線に関する。 The present invention relates to a trolley wire, and more particularly to a trolley wire suitable for heavy simple overhead wire.
従来、新幹線の架線として、吊架線、補助吊架線、トロリ線の３本で構成されるヘビーコンパウンド架線が用いられている（例えば、特許文献１参照）。 BACKGROUND ART Conventionally, a heavy compound overhead wire composed of three wires, a suspension wire, an auxiliary suspension wire, and a trolley wire, is used as an overhead wire of a bullet train (see, for example, Patent Document 1).
図１（ａ）は、ヘビーコンパウンド架線３０の概略図である。ヘビーコンパウンド架線３０においては、補助吊架線３２がドロッパー３４により吊架線３１から吊り下げられ、トロリ線３３がハンガー３５により補助吊架線３２から吊り下げられ、吊架線３１、補助吊架線３２、トロリ線３３が並列に配線される。
FIG. 1 (a) is a schematic view of a heavy compound wire 30. In the heavy compound overhead wire 30, the auxiliary suspension wire 32 is suspended from the suspension wire 31 by the
このヘビーコンパウンド架線３０に使用されるトロリ線３３には、銅錫の合金系、銅鋼の複合系材料からなるトロリ線が適用されており、その公称断面積が１７０ｍｍ２である場合に加わる張力は最大で２トンである。 A trolley wire made of a composite material of copper tin alloy and copper steel is applied to the trolley wire 33 used for the heavy compound connecting wire 30, and a tension applied when the nominal cross-sectional area is 170 mm 2 Is up to 2 tons.
また、従来の架線の一つとして、ヘビーコンパウンド架線３０における補助吊架線３２を省き、吊架線とトロリ線の２本で構成されるヘビーシンプル架線（ヘビーシンプルカテナリ方式架線ともいう）が知られている（例えば、特許文献２参照）。 In addition, as one of the conventional overhead wires, a heavy simple overhead wire (also referred to as a heavy simple catenary overhead wire) is known in which the auxiliary suspension wire 32 in the heavy compound overhead wire 30 is omitted and the suspension wire and trolley wire are two pieces. (See, for example, Patent Document 2).
図１（ｂ）は、ヘビーシンプル架線４０の概略図である。ヘビーシンプル架線４０においては、トロリ線４２がハンガー４３により吊架線４１から吊り下げられ、吊架線４１、トロリ線４２が並列に配線される。
FIG. 1 (b) is a schematic view of the heavy simple overhead wire 40. In the heavy simple overhead wire 40, the trolley wire 42 is suspended from the hanging wire 41 by the
架線の大電流容量化、架線の管理工数低減及び低コスト化のために、新幹線に用いる架線をヘビーコンパウンド架線３０からヘビーシンプル架線４０に切り替える場合、トロリ線に加わる張力を最大で２トン（１９．６ｋＮ）であったものから２.５トン（２４．５ｋＮ）以上に引き上げることが、集電性能向上のために必要不可欠である。また、大電流容量が必要であるために架線をヘビーコンパウンド架線３０からヘビーシンプル架線４０に切り替える場合、線条が３本から２本になることでトロリ線に流れる電流比率も高くなる。さらに、ヘビーシンプル架線４０のトロリ線４２に２．５トンの張力を加えたときの押上量、ひずみ量は、ヘビーコンパウンド架線３０のトロリ線３３に２トンの張力を加えたときの押上量、ひずみ量と同等であると予想される。 When switching the overhead wire used for the Shinkansen from heavy compound overhead wire 30 to heavy simple overhead wire 40 in order to increase the current capacity of the overhead wire, reduce the number of man-hours for managing the overhead wire, and reduce costs, the tension applied to the trolley wire is up to 2 tons (19 It is essential to improve the current collection performance to raise 2.5 tons (24.5 kN) or more from what was .6 kN). In addition, when the overhead wire is switched from the heavy compound overhead wire 30 to the heavy simple overhead wire 40 because a large current capacity is required, the ratio of the current flowing through the trolley wire is also increased by changing the number of wires from three to two. Furthermore, the lifting amount when 2.5 ton of tension is applied to the trolley wire 42 of the heavy simple overhead wire 40, the amount of strain is the lifting amount when 2 ton of tension is applied to the trolley wire 33 of the heavy compound overhead wire 30, It is expected to be equivalent to the amount of strain.
しかしながら、従来のトロリ線では、新幹線用のヘビーシンプル架線４０に用いるには振動疲労特性が不十分であり、具体的には、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したときに、トロリ線が疲労断線するまでの振動回数が１０００万回以上となることは難しい。 However, in the conventional trolley wire, the vibration fatigue characteristics are insufficient for use in the heavy simple overhead wire 40 for Shinkansen, and specifically, under the condition of strain 500μ in a state where a tension of 2.5 tons is applied. When the vibration fatigue test which applies vibration is carried out, it is difficult for the number of vibrations until the fatigue failure of the contact wire becomes 10 million or more.
また、銅被覆鋼の複合系材料からなるトロリ線は、電線としての安全率が２．５であり、銅錫系の合金材料からなるトロリ線の安全率２.２と比較して高いために、架線するときの張力を２.５トン以上にした場合に摩耗しろが少なく、ヘビーシンプル架線へ適用できないという問題がある。 In addition, the trolley wire made of a composite material of copper-coated steel has a safety factor of 2.5 as a wire, which is higher than the safety factor of a trolley wire made of a copper-tin alloy material, 2.2. There is a problem that the wear margin is small when the tension when making the overhead wire is 2.5 tons or more, and it can not be applied to the heavy simple overhead wire.
したがって、本発明の目的の１つは、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線を提供することにある。 Therefore, one of the objects of the present invention is to provide a trolley wire suitable for heavy simple overhead wire, which has excellent vibration fatigue characteristics even under high tension.
本発明の一態様は、上記目的を達成するために、下記［１］〜［６］のトロリ線を提供する。 One aspect of this invention provides the trolley wire of following [1]-[ 6 ], in order to achieve the said objective.
［１］２．５トン以上の張力が加えられた状態で新幹線用のヘビーシンプル架線に使用されるトロリ線であって、公称断面積が１７０ｍｍ２、及び引張強さが４３０ＭＰａ以上である、銅合金からなるトロリ線本体と、前記トロリ線本体の摩耗限度位置よりも下の位置に形成された２つの溝にそれぞれ挿入された、摩耗検知用の検知線と、を有し、前記銅合金がＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金であり、前記トロリ線本体の導電率が８０％ＩＡＣＳ以上であり、前記トロリ線本体の伸び率が３．０％以上であり、前記トロリ線本体に前記２つの溝が形成されることによる耐振動疲労特性の低下を抑えるため、前記２つの溝が形成された前記トロリ線本体の断面積が１６４ｍｍ２以上であり、前記２つの溝の合計断面積が６ｍｍ ２ 以下であり、前記トロリ線本体が、２．５トンの張力を加えた状態で、ひずみ５００μの条件で１０００万回の振動を加えても断線しない振動疲労特性を有する、トロリ線。 [1] Copper wire which is used as a heavy simple overhead wire for Shinkansen with a tension of 2.5 tons or more, and has a nominal cross-sectional area of 170 mm 2 and a tensile strength of 430 MPa or more has a trolley wire body made of an alloy than said wear limit position of the contact wire body is inserted into the two grooves formed in the down position, the detection line for wear detection, wherein the copper alloy It is a Cu-Sn-In alloy or a Cu-Sn alloy, the conductivity of the trolley wire body is 80% IACS or more, the elongation percentage of the trolley wire body is 3.0% or more, and the trolley wire to suppress the reduction in the resistance to vibration fatigue due to the two grooves on the main body is formed, the cross-sectional area of the trolley wire body the two grooves are formed Ri der 164 mm 2 or more, of the two grooves 6 mm in total cross sectional area 2 or less, the trolley wire having a vibration fatigue characteristic which does not break even when 10 million times of vibration is applied under a condition of strain 500μ in a state where the trolley wire main body is applied with a tension of 2.5 tons .
［２］前記検知線が、絶縁電線、光ファイバのいずれかからなる、上記［１］に記載のトロリ線。
[ 2 ] The trolley wire according to the above [1] , wherein the detection wire is made of either an insulated wire or an optical fiber.
本発明によれば、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線を提供することができる。 According to the present invention, it is possible to provide a trolley wire suitable for a heavy simple overhead wire, which has excellent vibration fatigue characteristics even under high tension.
〔実施の形態〕
（トロリ線の構造及び特性）
図２は、本発明の実施の形態に係るトロリ線１の径方向の断面図である。トロリ線１は、電車等の電気車用の架線に用いられるトロリ線であって、特に、新幹線等の高速で運転される電気車用のヘビーシンプル架線に好適なトロリ線である。また、トロリ線１は、ＪＩＳ Ｅ ２１０１に規定されたみぞ付硬銅トロリ線に該当する。
Embodiment
(Structure and characteristics of trolley wire)
FIG. 2 is a radial sectional view of the trolley wire 1 according to the embodiment of the present invention. The trolley wire 1 is a trolley wire used for an overhead wire for an electric vehicle such as a train, and is a trolley wire particularly suitable for a heavy simple overhead wire for an electric vehicle operated at a high speed such as a bullet train. The trolley wire 1 corresponds to a grooved hard copper trolley wire defined in JIS E 2101.
トロリ線１のトロリ線本体１０は、上部の小弧面１１、下部の大弧面１２、両側部の小弧面１１と大弧面１２の間のＶ字状の溝１３と、大弧面１２の底部から所定の距離の位置に設けられた検知線用溝１４と、を有する。 The trolley wire main body 10 of the trolley wire 1 has an upper small arc surface 11, a lower large arc surface 12, a V-shaped groove 13 between the small arc surface 11 on each side and the large arc surface 12, and a large arc surface And a detection line groove 14 provided at a predetermined distance from the bottom of the base 12.
トロリ線本体１０は、銅合金、例えば、Ｃｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金からなる。より具体的な例としては、Ｃｕ−Ｓｎ−Ｉｎ系合金の場合、錫（Ｓｎ）が０．２質量％以上０．４質量％未満、インジウム（Ｉｎ）が０．０５質量％以上０．２５質量％以下含有され、残部がＣｕと不可避不純物で構成される銅合金からなる。また、Ｃｕ−Ｓｎ系合金の場合、錫（Ｓｎ）が０．２質量％以上０．５質量％未満含有され、残部がＣｕと不可避不純物で構成される銅合金からなる。 The trolley wire body 10 is made of a copper alloy, for example, a Cu-Sn-In alloy or a Cu-Sn alloy. More specifically, in the case of a Cu-Sn-In alloy, tin (Sn) is 0.2% by mass or more and less than 0.4% by mass, and indium (In) is 0.05% by mass or more and 0.25% by mass. It consists of a copper alloy which is contained by mass% or less and the balance is composed of Cu and unavoidable impurities. In the case of a Cu-Sn alloy, tin (Sn) is contained in an amount of 0.2% by mass or more and less than 0.5% by mass, and the balance is made of a copper alloy composed of Cu and unavoidable impurities.
ヘビーシンプル架線に用いられるトロリ線本体１０には、２．５トンの張力が加わることが想定されるため、その引張強さは、４３０ＭＰａ以上である。例えば、トロリ線本体１０の公称断面積が１６０ｍｍ２である場合には、引張荷重が６９ｋＮ以上である。また、摩耗しろを大きくするためには、トロリ線本体１０の引張強さがより大きいことが好ましいが、大きすぎると後述する導電率が８０％ＩＡＣＳ（International Annealed Copper Standard）以上確保できないおそれや、検知線用溝１４の加工性が悪くなるおそれがあるため、トロリ線本体１０の引張強さは５００ＭＰａ以下であることが好ましい。 Since it is assumed that a tension of 2.5 tons is applied to the trolley wire main body 10 used for the heavy simple overhead wire, its tensile strength is 430 MPa or more. For example, when the nominal cross-sectional area of the trolley wire main body 10 is 160 mm 2 , the tensile load is 69 kN or more. Further, in order to increase the wear margin, it is preferable that the tensile strength of the trolley wire main body 10 is larger, but if it is too large, the conductivity to be described later may not be 80% IACS (International Annealed Copper Standard) or more. It is preferable that the tensile strength of the trolley wire main body 10 is 500 MPa or less because the processability of the detection wire groove 14 may be deteriorated.
例えば、トロリ線本体１０の材料としてＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金を用いることにより、引張強さを４３０ＭＰａ以上とすることができる。 For example, by using a Cu-Sn-In alloy or a Cu-Sn alloy as the material of the trolley wire main body 10, the tensile strength can be made 430 MPa or more.
トロリ線本体１０の伸び率は、高張力への耐曲げ性を考慮すると、ある程度の値を有することが好ましく、例えば、トロリ線本体１０の公称断面積が１６０ｍｍ２以上である場合には、３．０％以上であることが好ましい。 It is preferable that the elongation percentage of the trolley wire body 10 have a certain value in consideration of the bending resistance to high tension, for example, when the nominal cross-sectional area of the trolley wire body 10 is 160 mm 2 or more, 3 It is preferable that it is .0% or more.
トロリ線本体１０の導電率は、大電流容量の観点から、公称断面積が１６０ｍｍ２以上で導電率が８０％ＩＡＣＳ以上であることが好ましい。具体的には、大電流容量が必要であるために架線をヘビーコンパウンド架線からヘビーシンプル架線に切り替える場合、線条が３本から２本になることでトロリ線に流れる電流比率も高くなる。このことから、ヘビーシンプル架線に使用されるトロリ線では、公称断面積が１６０ｍｍ２以上で導電率が８０％ＩＡＣＳ以上であることが好ましい。例えば、ヘビーコンパウンド架線に用いられるトロリ線に要求される導電率が７０％ＩＡＣＳであった場合、２本の架線から構成されるヘビーシンプル架線に用いられるトロリ線は、３本の架線から構成されるヘビーコンパウンド架線に用いられるトロリ線よりも電流負荷が大きいため、７０％ＩＡＣＳの導電率では適用が不可となる。なお、８０％ＩＡＣＳ以上の導電率とする場合には、トロリ線本体１０の材料をＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金とすることが好ましい。 From the viewpoint of large current capacity, the conductivity of the trial wire body 10 is preferably such that the nominal cross-sectional area is 160 mm 2 or more and the conductivity is 80% IACS or more. Specifically, when the overhead wire is switched from a heavy compound overhead wire to a heavy simple overhead wire because a large current capacity is required, the ratio of the current flowing through the trolley wire is also increased by changing the number of filaments from three to two. From this, it is preferable that in the trolley wire used for the heavy simple overhead wire, the nominal cross-sectional area is 160 mm 2 or more and the conductivity is 80% IACS or more. For example, when the conductivity required for a trolley wire used for heavy compound wire is 70% IACS, the trolley wire used for a heavy simple wire composed of two wires is composed of three wires. The 70% IACS conductivity is not applicable because the current load is larger than the trolley wire used for heavy compound wire. When the conductivity is set to 80% IACS or more, the material of the trolley wire main body 10 is preferably a Cu-Sn-In alloy or a Cu-Sn alloy.
トロリ線１は、図２に示されるように、トロリ線本体１０に設けられた検知線用溝１４内に配置された検知線２０を有することが好ましい。検知線２０は、導体２１と、導体２１の周囲を被覆する絶縁体２２とを有する絶縁電線から構成される。 The trolley wire 1 preferably has a detection wire 20 disposed in a detection wire groove 14 provided in the trolley wire main body 10, as shown in FIG. The detection wire 20 is formed of an insulated wire having a conductor 21 and an insulator 22 covering the periphery of the conductor 21.
トロリ線１を介して電気車に給電が行われる際には、トロリ線本体１０の大弧面１２の底部が、パンタグラフ等の電気車の集電装置に接触する。このため、集電装置の摺動により、トロリ線本体１０は大弧面１２の底部から摩耗する。摩耗が進むと、設定された摩耗限度位置１５に達する前に検知線２０が断線し、断線検知システムが作動して、トロリ線本体１０が限界に近いところまで摩耗していることが検知される。 When power is supplied to the electric car through the trolley wire 1, the bottom of the large arc surface 12 of the trolley wire main body 10 contacts the current collector of the electric car such as a pantograph. For this reason, the contact wire main body 10 is worn away from the bottom of the large arc surface 12 by the sliding of the current collector. As the wear progresses, the detection wire 20 breaks before the set wear limit position 15 is reached, the break detection system is activated, and it is detected that the trolley wire body 10 is worn to a point near the limit .
なお、図２では、検知線として絶縁電線を用いた例で説明したが、光ファイバを検知線として用いてもよい。すなわち、検知線２０の代わりに、光ファイバからなる検知線を用いてもよい。 In addition, although the example which used the insulated wire as a detection line was demonstrated in FIG. 2, you may use an optical fiber as a detection line. That is, instead of the detection line 20, a detection line made of an optical fiber may be used.
トロリ線本体１０の検知線用溝１４は、例えば、図２に示されるように、その上端が摩耗限度位置１５と一致するように形成される。これによって、摩耗が摩耗限度位置１５に達する前に、検知線２０が断線する。ここで、小弧面１１の上端と摩耗限度位置１５との距離をＬ１、摩耗しろである大弧面１２の底部と摩耗限度位置１５との距離をＬ２とする。 For example, as shown in FIG. 2, the detection wire groove 14 of the trolley wire body 10 is formed such that the upper end thereof coincides with the wear limit position 15. This breaks the detection line 20 before the wear reaches the wear limit position 15. Here, the distance between the upper end of the small arc surface 11 and the wear limit position 15 is L1, and the distance between the bottom of the large arc surface 12 which is a wear margin and the wear limit position 15 is L2.
また、トロリ線本体１０の耐強度、耐振動疲労特性を低下させないために、検知線用溝１４の径を極力小さくして、トロリ線本体１０の断面積低下を抑えることが好ましい。具体的には、絶縁体２２の被膜厚さを従来の絶縁抵抗が確保できる下限厚さの０.２ｍｍとすることにより、検知線２０の直径を１.１５ｍｍまで小さくすることが可能となる。これにより、例えば、トロリ線本体１０の公称断面積が１７０ｍｍ２である場合には、１６４ｍｍ２以上のトロリ線本体１０の断面積を確保することができる。 Moreover, in order not to reduce the strength resistance and the vibration fatigue resistance characteristics of the trolley wire main body 10, it is preferable to reduce the diameter of the detection wire groove 14 as much as possible to suppress the reduction in the cross sectional area of the trolley wire main body 10. Specifically, by setting the film thickness of the insulator 22 to 0.2 mm, which is the lower limit thickness at which conventional insulation resistance can be secured, the diameter of the detection line 20 can be reduced to 1.15 mm. Thereby, for example, when the nominal cross-sectional area of the trolley wire main body 10 is 170 mm 2 , the cross-sectional area of the trolley wire main body 10 of 164 mm 2 or more can be secured.
（実施の形態の効果）
上記実施の形態によれば、高い張力が加わった状態でも優れた振動疲労特性を有する、ヘビーシンプル架線に好適なトロリ線１を提供することができる。このトロリ線１を用いることにより、新幹線等の高速で運転される電気車用の架線をヘビーシンプル架線にして、架線コスト、メンテナンスコストを低減することができる。
(Effect of the embodiment)
According to the above embodiment, it is possible to provide the trolley wire 1 suitable for a heavy simple overhead wire, which has excellent vibration fatigue characteristics even in a state in which high tension is applied. By using the trolley wire 1, the overhead wire for an electric vehicle operated at a high speed such as a bullet train can be made a heavy simple overhead wire, and the overhead wire cost and the maintenance cost can be reduced.
また、トロリ線１が検知線２０を有する場合には、トロリ線本体１０の摩耗量を管理することができ、例えば、トロリ線押上量が局部的に大きくなって局部摩耗が発生する場合であっても、安全を確保することができる。 In addition, when the trolley wire 1 has the detection wire 20, the wear amount of the trolley wire main body 10 can be managed, for example, when the trolley wire lifting amount is locally increased and local wear occurs. Even, you can ensure safety.
（トロリ線の振動疲労特性評価）
公称断面積が１７０ｍｍ２であり、引張荷重が６９ｋＮ以上（引張強さが４３０ＭＰａ以上）であり、導電率が８０％ＩＡＣＳ以上であり、Ｃｕ−Ｓｎ−Ｉｎ系合金からなるトロリ線本体１０に対して、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したところ、１０００万回の振動を加えても断線せず、１０００万回以上の振動に耐えられることがわかった。
(Evaluation of vibration fatigue characteristics of trolley wire)
It has a nominal cross-sectional area of 170 mm 2 , a tensile load of 69 kN or more (tensile strength of 430 MPa or more), a conductivity of 80% IACS or more, and a trolley wire main body 10 made of a Cu-Sn-In alloy. Vibration fatigue test to apply vibration under the condition of strain 500μ with tension of 2.5 tons, no breakage occurs even if 10 million vibrations are applied, and more than 10 million vibrations. It turned out that I could bear it.
また、公称断面積が１７０ｍｍ２であり、引張荷重が６９ｋＮ以上（引張強さが４３０ＭＰａ以上）であり、導電率が８０％ＩＡＣＳ以上であり、Ｃｕ−Ｓｎ系合金からなるトロリ線本体１０に対して、２．５トンの張力を加えた状態で、ひずみ５００μの条件で振動を加える振動疲労試験を実施したところ、１０００万回の振動を加えても断線せず、１０００万回以上の振動に耐えられることがわかった。 In addition, it has a nominal cross-sectional area of 170 mm 2 , a tensile load of 69 kN or more (tensile strength of 430 MPa or more), a conductivity of 80% IACS or more, and a trolley wire main body 10 made of a Cu-Sn alloy. Vibration fatigue test to apply vibration under the condition of strain 500μ with tension of 2.5 tons, no breakage occurs even if 10 million vibrations are applied, and more than 10 million vibrations. It turned out that I could bear it.
以上、本発明の実施の形態及び実施例を説明したが、本発明は、上記実施の形態及び実施例に限定されず、発明の主旨を逸脱しない範囲内において種々変形実施が可能である。 As mentioned above, although embodiment and Example of this invention were described, this invention is not limited to said Embodiment and Example, A various deformation | transformation implementation is possible in the range which does not deviate from the main point of invention.
また、上記に記載した実施の形態及び実施例は特許請求の範囲に係る発明を限定するものではない。また、実施の形態及び実施例の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。 In addition, the embodiments and examples described above do not limit the invention according to the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments and examples are essential to the means for solving the problems of the invention.
１ トロリ線
１０ トロリ線本体
１１ 小弧面
１２ 大弧面
１３ 溝
１４ 検知線用溝
２０ 検知線
DESCRIPTION OF SYMBOLS 1 trolley wire 10 trolley wire main body 11 small arc surface 12 large arc surface 13 groove 14 groove for detection wire 20 detection wire
Claims (2)
公称断面積が１７０ｍｍ２、及び引張強さが４３０ＭＰａ以上である、銅合金からなるトロリ線本体と、
前記トロリ線本体の摩耗限度位置よりも下の位置に形成された２つの溝にそれぞれ挿入された、摩耗検知用の検知線と、
を有し、
前記銅合金がＣｕ−Ｓｎ−Ｉｎ系合金又はＣｕ−Ｓｎ系合金であり、
前記トロリ線本体の導電率が８０％ＩＡＣＳ以上であり、
前記トロリ線本体の伸び率が３．０％以上であり、
前記トロリ線本体に前記２つの溝が形成されることによる耐振動疲労特性の低下を抑えるため、前記２つの溝が形成された前記トロリ線本体の断面積が１６４ｍｍ２以上であり、
前記２つの溝の合計断面積が６ｍｍ ２ 以下であり、
前記トロリ線本体が、２．５トンの張力を加えた状態で、ひずみ５００μの条件で１０００万回の振動を加えても断線しない振動疲労特性を有する、
トロリ線。 A trolley wire used for heavy simple overhead wire for Shinkansen with a tension of 2.5 tons or more,
A trolley wire body made of a copper alloy, having a nominal cross-sectional area of 170 mm 2 and a tensile strength of 430 MPa or more;
A detection line for detecting wear, which is respectively inserted into two grooves formed at a position below the wear limit position of the trolley wire main body;
Have
The copper alloy is a Cu-Sn-In alloy or a Cu-Sn alloy,
The conductivity of the trolley wire body is 80% IACS or more,
The elongation rate of the trolley wire body is 3.0% or more,
Wherein for suppressing the deterioration of the anti-vibration fatigue due to the contact wire body two grooves are formed, the cross-sectional area of the trolley wire body the two grooves are formed Ri der 164 mm 2 or more,
The total cross-sectional area of the two grooves is 6 mm 2 or less,
The trolley wire body has a vibration fatigue characteristic that does not break even if 10 million vibrations are applied under a strain of 500 μ in a state where a tension of 2.5 tons is applied.
Trolley wire.
請求項１に記載のトロリ線。 The detection wire consists of either an insulated wire or an optical fiber,
The trolley wire according to claim 1 .
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