| 摘要 |
PURPOSE: To surely prevent rainwater from entering an inner wheel raceway track, an outer wheel raceway track, and a rolling face part of a roller. CONSTITUTION: An outside bent section 9 is formed at an outer peripheral fringe of an outer wheel 3 and a seal standing wall 20 is formed at an inner peripheral fringe. A top end fringe of the seal standing wall 20 is brought into close proximity with an end close to inner periphery of a bottom face of the inner wheel 2. The seal standing wall 20 shuts off rainwater which infiltrates through a radial minute clearance 16 between an outer peripheral face of a second cylindrical section 15 and an inner peripheral face of the sleeve 14. |
