| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wheel having not only a function to travel but also a function to get over an obstacle. <P>SOLUTION: The stairs climbing wheel 2 climbs up while placing a slope plate 4 between the step difference of the stairs, carries the slope plate 4, and places the slope plate 4 across the front step difference before climbing up, and a gear 3 is meshed with a rack 5 on a top surface of the slope plate 4, and the wheel 2 climbs up. The slope plate 4 is pulled up to an upper step after climbing up of the wheel 2. When descending the stairs, the slope plate 4 is extended backward, and the wheel 2 climbs down the slope plate which is placed in advance similarly to the climbing up time. <P>COPYRIGHT: (C)2007,JPO&INPIT |
