| 摘要 |
PROBLEM TO BE SOLVED: To provide a tool suitable for recovering an accessory attached to an end of a nozzle, a method of closing the nozzle using the tool, a method of opening the nozzle, and a method of recovering the accessory. SOLUTION: The tool for recovering includes a nozzle chamber comprising a hermetic container capable of covering the end of the nozzle 2, and a sealing plug 10 having a first sealing plug body 11 with an outer periphery having an outer diameter smaller than the inner diameter of the nozzle 2, a second sealing plug body 12 with an outer periphery having an outer diameter smaller than the inner diameter of the nozzle 2, an elastic seal 13 sandwiched between the outer periphery of the first plug body 11 and the outer periphery of the second plug body 12, a driving shaft 14 bringing the elastic seal 13 into tight contact with the inner peripheral surface of the nozzle 2 by rotating, and a check valve 15 provided on either the first plug body 11 or the second plug body 12 for making a gas flow free from the first plug body 11 to the second plug body 12 to prevent the gas from flowing in the reverse direction. COPYRIGHT: (C)2005,JPO&NCIPI
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