| 摘要 |
PURPOSE:To simultaneously execute the insertion of a test bar, the check of the inside of a duct and recording by providing a floodlight to light up the front direction of a mandrel, recording camera to record the inside of the duct irradiated with the light of this floodlight and power source in the mandrel. CONSTITUTION:In a mandrel 6 for which an external dimension A and a lengthwise dimension are set to prescribed dimensions as the test bar, a floodlight 9 to light-up the front direction of the mandrel 6, recording camera 8 to record the inside of the duct, which is irradiated with the light of this floodlight 9, and power source 7 for operating these floodlight 9 and recording camera 8 are sealed and built in. Thus, when the mandrel 6 is inserted into the duct, the mandrel 6 is set to the rated dimension as the so-called test bar. Accordingly, the test is executed by inserting the test bar and further, in that case, the inside of the duct irradiated with the floodlight is recorded by the recording camera 8. |
