| 摘要 |
To enable a cage to be shortened in a width direction and enable the height of cage to be reduced. In the present cage 10, both pillar portions 12 which face each other in a circumferential direction of a pocket 13 have a plurality of bent portions 15a, 15b, and 15c which are alternately bent in a width direction, and each bent portion is provided with roller stopping portions 16a, 16b, and 16c protruding into the pocket. The bent portions are formed in a curved cross-sectional shape. Tip portions of the bent portions in the thickness direction of the cage are formed in a cross-sectional shape that becomes narrower toward the tips, and the tip portions are drawn in a state where they protrude into the pocket by plastic deformation working, thereby forming the roller stopping portions. |
