| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce repair costs by extending the life time of a seal cup. SOLUTION: The seal cup 2 is formed by pasting an elastic body 3 such as urethane rubber to a sliding member 4 such as a polyethylene sheet. In the sliding member 4, a shoulder part A to be first in contact with piping is formed thicker than the other parts. When a device for inspecting the inside of a tube is moved, the shoulder part becomes worn intensively. Since the shoulder part is formed thick, the time until the sliding member 4 is worn out and disappear is prolonged to extend the life time of the seal cup 2, and repair costs can be reduced. By coating the sliding member 4, instead of re-pasting the sliding member 4 to the elastic body 3 in this system and coating the sliding member 4 when the sliding member 4 is worn out, use one seal cup can be used repeatedly and repair cost can be reduced.</p> |
