| 摘要 |
<p>PURPOSE:To carry smooth running free from slip or wear and increase the effective space on the dolly side in each part where front wheel is installed by constructing it in a fixed structure which consists merely of provision of a buoyancy action part at the dolly and furnishing of a guide for buoyant motion in a curved path. CONSTITUTION:A guide rail 11 is furnished between a left and a right running rail 3A, 3B, and thereon a dolly 20 is placed having front wheels 23A, 23B and rear wheels, and near these wheels, respective guide devices 31, 41 are provided to be guided by the guide rail 11, and a guide 51 for buoyancy motion capable of applying an effect from below to a buoyancy action part 37 furnished near either of the front wheels 23A, 23B and rear wheels is provided on a curved path 50a, wherein the other pair of wheels 29, 30 are made rotatable round a common vertical axis 25 and its one side is arranged to move interlocking with a running drive device 28.</p> |
