| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cage of a roller bearing capable of smoothly rolling a roller. <P>SOLUTION: A column part 15a provided in the cage includes a pair of inclined parts slantingly extending to the rotational axis direction of the cage. Side wall surfaces of a pocket in the pair of inclined parts have areas of extending along the rotational axis direction of the cage, that are, roller guide parts for guiding the roller. Here, in the roller guide part, a central area in the rotational axis direction of the cage has a projection part 36a formed by projecting a part of the side wall surface in the peripheral direction so that the side wall surface forms recessed parts 37a and 37b respectively recessed in the peripheral direction in both end part areas in the rotational axis direction of the cage. <P>COPYRIGHT: (C)2013,JPO&INPIT |
