| 摘要 |
PROBLEM TO BE SOLVED: To provide a duct cleaning device capable of reducing a load on a maintenance operation by satisfactorily pressing a knife scraper 22 on a drive shaft 15 even if the knife scraper 22 is worn to prevent the performance of dust removal from the knife scraper 22 from lowering. SOLUTION: The knife scraper 22 is disposed in the axis direction of the drive shaft 15 so that its tip part comes into contact with the outer peripheral surface of the drive shaft 15. Air cylinders 23 energizing the knife scraper 22 in the axis direction of the drive shaft 15 are disposed on the outer periphery of the knife scraper 22. COPYRIGHT: (C)2005,JPO&NCIPI
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