| 摘要 |
<p>PROBLEM TO BE SOLVED: To inspect the inside of a main pipe while preventing rising of impurities.SOLUTION: A guide cylinder 4 having a reflector 8 at its tip is inserted into a branch pipe 2 that is branched upward from a main pipe 1 to be connected so that the tip does not touch the bottom of the main pipe 1 and the watertight state between the branch pipe 2 and the guide cylinder 4 is kept. A cable 5 having an imaging device 6 at its tip is inserted into the guide cylinder 4 so that the watertight state between the guide cylinder 4 and the cable 5 is kept. Then, the field of view inside the main pipe 1 reflected on the reflector 8 is captured by the imaging apparatus 6, and the main pipe 1 is inspected.</p> |
