| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure for easily supplying lubricating oil between an outer peripheral edge part and an inner peripheral surface, by preventing the outer peripheral edge part of a cage 3b from striking at the edge on the inner peripheral surface of an folded vertical wall 9a. SOLUTION: The cage 3b is made of a synthetic resin. A cross-sectional shape of the outer peripheral edge part of this cage 3b is formed in a convex curved surface over the whole periphery. This constitution can prevent the outer peripheral edge part of this cage 3b from striking at the edge on the inner peripheral surface of the folded vertical wall 9a even if this cage 3b is inclined to a race 4a. A clearance between outer peripheral edge part both side surfaces of this cage 3b, the race 4a and a member arranged on the opposite side of this race 4a, can be enlarged toward the outer peripheral edge part, and the lubricating oil can be easily supplied between this outer peripheral edge part and the inner peripheral surface of the folded vertical wall 9a. COPYRIGHT: (C)2007,JPO&INPIT
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