| 摘要 |
A cage 10 includes cage pockets 12 for retaining rollers 13 at plural positions along a circumferential direction of an annular plate 11. A projection 14 extending in thickness direction of the cage is formed at a central part in the circumferential direction on an inner face 12a of the cage pocket to pivotally support the roller 13. The projection 14 is provided with a chamfered portion (non-contact portion) 14a formed by chamfering an edge in the thickness direction, and a flat portion (contact portion) 14b that is brought into contact with an opposing central portion 13c in the thickness direction on a roller end face 13a of the roller 13 seated in o the cage pocket 12. The flat portion 14b has a flat length almost equivalent to a displaceable distance of the cage 10 in the thickness direction thereof. |
