| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable even a tube lining material for a large bore to be smoothly inverted and inserted into a duct at a length of a necessary minimum limit. SOLUTION: A cylindrical mouthpiece 4 is formed by coupling a pair of hollow split pieces 4A, 4B. One end of a tube lining material 3 is connected to an outer periphery of the one end of the mouthpiece 4 in a state in which the one end of the material is folded to its outside, and a guide tube 5 is connected to the other end. Particularly, the split pieces 4A, 4B are formed at its coupling surface 7 at an angle of 45 deg. with respect to an end face 9 so as to enable the surface 7 to be changed to be joined from a straight state to a bent state at 90 deg.. According to the mouthpiece 4, the pieces 4A, 4B can be guided into a manhole 1 in the straight state, after the pieces 4A, 4B are introduced into the manhole 1, the pieces 4A, 4B are joined in the bent state of 90 deg., and a connecting part of the lining material 3 can be directed toward an inlet of a duct 2.</p> |
