| 摘要 |
PURPOSE:To make it possible to deviate a work point laterally and attract a deposited article while running even on the inner surface of a non-magnetic pipeline not only by running forward and backward and turning on the spot but also running laterally with four running wheels. CONSTITUTION:Four running wheels 3a, 3b, 3c and 3d, each of which is rotated individually, are mounted on a truck 1 equipped with a suction hose 6 to which a suction part 8b is installed at the tip in such a fashion that their rotary axis may be contracted on the central side of the truck 1. A plurality of follower wheels 4, which are rotated freely in a direction different from the rotary direction of the main running wheels, are installed to the outer periphery of a ground contact side of the main running wheels. The truck 1 is provided with a pipe inner surface attracting device 25 which is mounted with attracting pads 29a and 29b which attract on the inner surface of the pipe and which are installed at the tip of a plurality of deflection mechanisms 30a which are deflectable horizontally but not deflectable vertically. |
