| 摘要 |
PROBLEM TO BE SOLVED: To provide an attachment device for a sewer main pipe to be connected to a manhole, which is easy to construct and is capable of improving work efficiency.SOLUTION: An attachment device for attaching a sewer main pipe 4 to a peripheral wall 5 of a manhole comprises: an elastic cylindrical body 1; an inner ring 2; and an outer ring 3. The elastic cylindrical body 1 includes: an end that includes an aperture 1a on one side of the cylinder and is inserted into a drilled hole 5a on the peripheral wall 5 of the manhole; and an end that includes an aperture 1b on the other side of the cylinder and fits with the outer periphery of an end of the sewer main pipe 4. The inner ring 2 is arranged on the inner peripheral side of the aperture 1a on the one side of the elastic cylindrical body 1 inserted into the drilled hole 5a on the peripheral wall 5 of the manhole; and includes a plurality of screwing holes 8 spaced from each other over the whole periphery of the ring, where a fixture 11 is screwed into each screwing hole 8 from the inner peripheral side. The outer ring 3 is arranged between the elastic cylindrical body 1 and the inner ring 2; and is formed so as to be capable of being expanded by appearance of the fixture 11 of the inner ring 2. One of the inner ring 2 and the outer ring 3 includes an engaging part 12; the other includes an engaged part 13 for engaging with the engaging part 12. |
