| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a caster capable of safely and easily getting over a step height. <P>SOLUTION: This step height getting-over caster includes a leg, at least two wheels, a crawler and a wheel case. The wheel case is installed on the leg so as to be rotatable with the leg as a shaft, and a wheel shaft of at least the two wheels is fixed to the wheel case. The crawler is arranged so as to contact with the outer periphery of at least the two wheels, and the crawler contacts with a road surface in the rearmost wheel part, and separates from the road surface in the forefront wheel part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
