| 摘要 |
A pair of rim portions 4a and 4b is formed in the shape of a discontinuous segmental circular ring, which includes cutout portions 8a and 8b, respectively, at one position. The cutout portions of the respective rim portions are concentrically disposed so as to face each other with a predetermined interval therebetween in an axial direction while having the same phase in a circumferential direction. A plurality of pillar portions 6 form pockets 10 where rollers 14 are retained. An expandable elastic connecting portion 12, which connects one end portion 84a of one rim portion in the circumferential direction to the other end portion 82b of the other rim portion in the circumferential direction, is provided at the pair of rim portions. A convex portion 86a, which protrudes toward one end portion, is formed at the other end portion 82a of one rim portion in the circumferential direction, and a concave portion 88a, which is recessed so as to correspond to the convex portion formed at the other end portion, is formed at the one end portion. A convex portion 86b, which protrudes toward the other end portion, is formed at one end portion 84b of the other rim portion in the circumferential direction, and a concave portion 88b, which is recessed so as to correspond to the convex portion formed at the one end portion, is formed at the other end portion. |
