| 摘要 |
PURPOSE:To simplify removal and reinstallation work of covers at the time of their replacements by fixing a ducter roller horizontally on a mounting base and by pulling one end of a cover which is placed over the roller in axial direction by a pulling device. CONSTITUTION:Both ends of the axis of a roller 6 are fixed horizontally by fixing devices 2 and 3 on a mounting base 1 and a cover 7 is pulled with a wire rope 4 via a pulley 14 by a pulling device 5. When the cover 7 completed covering of the roller, the cover is tightened by pulling a squeezing string. The ducter roller installed may be removed by loosening the fixing devices. |
