| 摘要 |
PROBLEM TO BE SOLVED: To obtain a roller bearing, which efficiently prevent rusting and deterioration, can be surely actuated for a long time, does not need maintenance, and can be manufactured inexpensively. SOLUTION: This roller bearing comprises at least one pair of supporting bars, a plurality of shafts fixed to at least one of the supporting bars at both ends at a predetermined interval, and pipe-shaped rollers, which are rotatably mounted to the plurality of shafts, which have an inside diameter dimension larger than an outside diameter dimension of the shafts, and whose bottom ends project downward from bottom ends of the pair of supporting bars. COPYRIGHT: (C)2009,JPO&INPIT
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