| 摘要 |
PURPOSE: A slope and a dual wheel for going up and down stairs are provided to enable all moving units to go up and down stairs regardless of the kind of the moving units. CONSTITUTION: A method for going up and down stairs for a moving unit is as follows. A dual wheel, composed of a main wheel(H) with a big diameter and an auxiliary wheel(F) with a small diameter, is formed. A concave main wheel guideline(B) is coupled to a convex line(A) which is in gear with the auxiliary wheel. The main wheel guide line is formed lower than the convex line.
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