| 摘要 |
PURPOSE:To enabale the titled tractor to be traveled accurately horizontally and prevent slipping from occurring when accelerating or decelerating, by a method wherein the second wheels using rubber tires or the like are provided on the outside of the first wheels travelling on rails, and the first and second wheels are driven respectively. CONSTITUTION:In a tractor for body to be tested which is traveled on rails accurately installed and is used for measuring properties of the body to be tested, the first wheels 4 made of steel and traveled on the rails 2 and the second wheels 7 using rubber tires or the like traveled on the rail-less ground provided in parallel with the rails 2 are provided. The wheels 4, 7 can be freely driven respectively by motors 8, 9, and accurate traveling is performed by the rails 2 and the steel wheels 4, and when accelerating or decelerating, slipping is prevented by the second wheels 7 using rubber tires. |
