| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure capable of being easily manufactured, having a sufficient durability, capable of increasing a load capacity, and facilitating an operation handling a plurality of rollers 7a. SOLUTION: The plurality of rollers 7a are disposed between the outer peripheral surface of an inner ring 4c and the inner peripheral surface of an outer ring 6a in the rollingly holed state on a recessed retainer 14a. The recessed retainer 14a comprises a pair of annular plates 23 and 23 and a plurality of elastic stays 24 and 24. Each of the annular plates 23 and 23 comprises, on one side surface thereof, a plurality of recessed parts 16 and 16 allowing the end part of each of rollers 7a to insert to the inside thereof in the rotatable state of each roller 7a thereon. Each of the elastic stays 24 and 24 comprises a piano wire or a wire material having an elasticity and a strength generally equal to or higher than those of the piano wire.
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