| 摘要 |
PROBLEM TO BE SOLVED: To remarkably reduce cost by reducing the diameter of a used bearing in a high function wheel of a caster containing the bearing and incorporated with a suspension mechanism. SOLUTION: The bearing is interposed between both left and right leg pieces of a fixed side disc stretching over a suspension part mounted on an inner peripheral side of an annular grounding part and extending both the leg pieces to be close to an axle and a movable side disc interposed between the both the leg pieces of the fixed side disc, constituted into a substantial U-shape in cross section to stretch over the suspension part, fixed at an outer peripheral end of the suspension part, and extending both the leg pieces to be close to the axle. The diameter of the bearing therefore can be reduced by the length of both leg pieces extended to be close to the axle of the fixed side disc and the movable side disc stretching over the suspension part. As a result, the bearing of the small diameter having an extremely inexpensive price of about average 1/10 as a bearing unit body price is used, and thereby cost can be remarkably reduced. COPYRIGHT: (C)2007,JPO&INPIT
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