| 摘要 |
<p>PURPOSE:To inspect the interior of a conduit over the entire length of by observing the state in the conduit imaged by a camera by a television display while drawing a hollow pipe from the conduit. CONSTITUTION:After a hollow pipe 1 is laid in a conduit 7, a messenger wire 22 is drawn into the pipe 1. A power communication composite cable 27 is coupled to the rear end of the wire 22, drawn and passed through the pipe 1. A CCD camera 29 and an illumination lamp 30 are mounted at the end of the cable 27 drawn into the pipe 1. A takeup band 46 is driven to draw the pipe 1 thereby to draw the camera 29 into the conduit 7 to move in the conduit 7. Accordingly, an image in the conduit 7 imaged by a camera 29 is observed by a display 50 while illuminating the interior of the conduit 7 by the lamp 30 to inspect the interior thereof.</p> |
