| 摘要 |
A comb-shaped resin retainer (1) includes an annular section (2) and a plurality of pillar sections (3) which protrude to one side in the axial direction from one side of the annular section (2). A gap between the pillar sections (3), (3) adjacent to each other in the circumferential direction serves as a pocket (Pt) for retaining a cylindrical roller (4). A side face (5) of the pillar section (3) which serves as the inner face of the pocket (Pt) is formed in a recessed shape. Each pillar section (3) is tilted so as to become closer to the retainer axial center as the pillar section (3) extends toward the tip of the pillar section (3). A flat portion (5a) is provided on the side face (5) of the pillar section (3) which serves as the inner face of the pocket (Pt). The flat portion (5a) continues axially from the tip portion of the pillar section (3) to the base end portion thereof. |
