| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel and useful caster, which has a simple configuration, and can more flexibly respond to an obstacle such as a step. SOLUTION: The caster is configured such that an inner ring 2 is eccentrically disposed inside an outer ring 3, and an axle 11 is attached to the inner ring 2, whereby the inner ring 2 internally contacts with the outer ring 3 and rolls on an inner surface of the outer ring 3 to make an internal contact position thereof changeable. Inertia force due to a loaded object can be prevented from directly acting onto the caster as a collision reactive force, and generation of a drastic elevating action of the axle 11 can be avoided. As a result, generation of impact or noise can be effectively prevented. In this case, the inner ring can rise to a necessary height according to a size of the obstacle so that equally-effective buffering action can be generated. COPYRIGHT: (C)2008,JPO&INPIT
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