| 摘要 |
PROBLEM TO BE SOLVED: To completely collect even foreign matters remaining in the bottom part of a tube by a method in which foreign matters in the tube are made to scatter by pulse air to be sucked by a suction trumpet, the inside circumstance of the tube is monitored by optical fibers, and constitution is arranged to conduct removing work. SOLUTION: When foreign matters in a tube 100 is removed, the front end part of a pulse air nozzle 3 is inserted together with a suction trumpet 2 into a place which is slightly deeper than the remaining place of the foreign matters 101 in the tube 100, and pulse air introduced from an air source is made to spout from a nozzle 2. The foreign matters 101 is blown off by the pulse air, sucked into the suction trumpet 2, and discharged outside through a suction hose 4. In this operation, while the inside of the tube 100 being made sure by an optical fiber lens attached to the end of the nozzle 3, the suction trumpet 2 and the pulse air nozzle 3 are moved manually. After the use, the suction trumpet and the pulse air nozzle 3 are received in a receiving part 1 by drawing a wire 7. |
