| 摘要 |
PURPOSE:To make a working part small-size and stable, by connecting a working truck to a power transmitting member which is supported movably on the outside circumference of a work and running the working truck stably. CONSTITUTION:A working truck 5 provided with rollers 4 at tips of legs is connected to a power transmitting member 2 which is supported movably on the outside circumference of a work 1, and the length of legs of the truck 5 is controlled to adjust the tension of the power transmitting member 2. Legs of the truck 5 are stretched against the surface of the work 1 to stabilize the degree of parallel of the truck 5. Thus, the power transmitting member 2 is turned through sprockets 7a and 7b by a power driving device 6, which is placed in a position distant from the working part, to run the light-loaded and small-size truck 5 stably. |
