| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability of a leak test.SOLUTION: A leak testing seal device S that keeps the inside of a cylindrical member 73 airtight when testing the presence or absence of a leak at a place in which the cylindrical member 73 is mounted on an outer surface of a tank body 71 comprises: a cylindrical seal member 10 that comes in tight contact elastically with the outer periphery of the cylindrical member 73; and a fluid-pressure actuator 20 that moves the cylindrical seal member 10 between a seal position allowing the cylindrical seal member 10 to be fitted on the cylindrical member 73 and a retreat position at which the cylindrical seal member 10 retreats from the cylindrical member 73 to the tip-end side. The fluid-pressure actuator 20 moves the cylindrical seal member 10 from the retreat position to the seal position using a fluid pressure. Then, the fluid-pressure actuator 20 releases the fluid pressure to release an elastic pressure applied to the cylindrical member 73 in the axial direction by the cylindrical seal member 10.SELECTED DRAWING: Figure 1 |
