| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the intrusion of a foreign matter by closing an opened part during the overhaul of a plant. SOLUTION: A main body part 12 made of sheet-shaped rubber and a support part 14 made of plate-shaped rubber are mutually joined to form a cavity 16 in its inside. The main body part 12 is accommodated in an opened part of a plant, and air is introduced into the cavity through a nozzle 20 attached to the support part 14 to swell the main body part 12. The outer periphery 12a of the main body part 12 sticks fast to the inner wall face of the opened part to shut the opened part.</p> |
