| 摘要 |
PROBLEM TO BE SOLVED: To provide a cage that can be stably stacked without causing inclination or displacement. SOLUTION: The cage is formed in a hollow annular shape which is continuously tapered and diameter-shrunk from one side (a large diameter side 18a) to the other side (a small diameter side 18b), and in an approximately truncated conical shape as a whole. On the end face on one side (in a region from an inner diameter end face Min to an outer diameter end face Mout), a recessed portion G is provided whose outer diameter size R4 is the same as or somewhat larger than an outer diameter size R2 on the other side and which is recessed by a predetermined amount Hg from the other site. The recessed portion has a positioning guide face S1 for building and positioning the built-up cage 18 while inwardly guiding it at its other side, and a supporting face S2 for upwardly supporting it at its other side. In this case, the other cage is placed at its other side on the recessed portion, and so the plurality of cages can be built up. COPYRIGHT: (C)2008,JPO&INPIT
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