| 摘要 |
PURPOSE:To execute easily an overall measurement by providing at least three turning pieces and damping pieces on a pedestal, and installing a push spring and a spring. CONSTITUTION:A roller 10 is made adjacent to a trolley line 24 by supporting a supporting rod 1, by drawing a tow rope 20 in this way, the trolley line 24 is inserted between the roller 10 and a light shielding material 13. The roller 10 is hooked onto the trolley line 24, and subsequently, moved along the trolley line 24 by a supporting rod 1 by loosening the tow rope 20 and bringing the light shielding material 13 into contact with the lower face of the trolley line 24. In this way, an abrasion state of the trolley line is read continuously by a scale plate 23. |
