STROKE GAUGE FOR SPRING-TYPE AUTOMATIC TENSION ADJUSTING DEVICE FOR ELECTRIC TRAIN OVERHEAD LINE

PROBLEM TO BE SOLVED: To provide a stroke gauge capable of displaying an appropriate amount of expansion/contraction of a rod due to temperature change of a spring-type automatic tension adjusting device for an electric train overhead line.SOLUTION: A stroke gauge is attached to a spring-type automatic tension adjusting device 1 for an electric train overhead line which includes: a cylindrical casing 2; a rod 8 arranged slidably in a shaft center direction, and whose one end is exposed out of the casing and is connected to an end part of an electric train overhead line 9 to pull the same; and a coil spring for biasing the rod toward a bottom surface direction of the casing. The stroke gauge is bent and extended in an L-shape from a base part of the casing and on a surface of which a graduated scale 14 is provided, which indicates an amount of extension/contraction of the electric train overhead line being pulled at the normal temperature, on the basis of protruding/inserting amount of the rod from/into an end part of the cylindrical casing. Further, an indicator 12, which is suspended from the end part of the casing on the electric train overhead line side, is configured to indicate a position of an apparent amount of extension/contraction, and also a conversion chart is attached adjacently to the graduated scale, for obtaining a correction value of the present temperature at the time of measuring. 【課題】電車線用バネ式自動張力調整装置の温度変化によるロッドの適正な伸縮量を知ることができるストロークゲージを提供する。【解決手段】円筒状ケーシング２と、軸芯方向にスライド自在に位置せしめられており、一端はケーシング外に露出して電車線９の端部に接続されてそれを牽引するロッド８と、ロッドをケーシングの底面方向に付勢するコイルバネとからなる電車線用バネ式自動張力調整装置１に付設されるストロークゲージにおいて、ケーシングの基部からＬ字型に屈曲延設され、表面にはロッドの円筒状ケーシング端部からの出入量を基に、牽引中の電車線の標準気温時における伸長／収縮量を示す目盛尺１４を設け、ケーシングの電車線側端部から垂設された指針１２の示す位置により、見掛け上の伸長／収縮量を知る様にすると共に、目盛尺に隣接させて計測時の現在気温における修正値を得る為の換算表を付設したストロークゲージ。【選択図】図１