| 主权项 |
1. A single-split cage comprising:
a pair of circular ring sections having a circular ring shape and being disposed so as to be opposed to each other; a plurality of pillar sections continuously extending between the circular ring sections and arranged at predetermined intervals in the circumferential direction; and a plurality of pockets formed in the portions enclosed by the pair of circular ring sections and the plurality of pillar sections and at predetermined intervals in a circumferential direction, wherein: in the single-split cage, a split section for splitting the cage at one portion in the circumferential direction thereof in a direction being crosswise to the circumferential direction is provided; the split section is formed at regions extending between the pockets adjacent to each other in the circumferential direction, and at the circumferential center position between these pockets, a one-side split face and an other-side split face formed by splitting the regions are disposed so as to be opposed in the circumferential direction; engagement sections being mutually engageable are respectively provided on the one-side split face and the other-side split face, and these engagement sections are disposed so as to be opposed to each other in the circumferential direction; on the one-side split face, as the engagement sections, a plurality of one-side convex sections protruding toward the other-side split face and a one-side concave section formed by denting the area between these one-side convex sections are provided; on the other-side split face, as the engagement sections, a plurality of other-side concave sections with which the plurality of one-side convex sections are engageable and an other-side convex section protruding toward the one-side split face between the other-side concave sections and engageable with the one-side concave section are provided; when the thickness between the one-side split face, other than the engagement sections, and the pockets on both sides is W1, and when the thickness between the other-side split face, other than the engagement sections, and the pockets on both sides is W2, the relationship of:
W1=W2is satisfied; and
in a state in which both the engagement sections of both the one-side split face and the other-side split face are engaged with each other, the relationship of:
A>B=C,is satisfied,
wherein the clearance formed between the one-side split face, other than the engagement sections, and the other-side split face, other than the engagement sections, in the circumferential direction is A; the clearance formed between the one-side convex section of the engagement sections of the one-side split face and the other-side concave section of the engagement sections of the other-side split face in the circumferential direction is B; and the clearance formed between the one-side concave section of the engagement sections of the one-side split face and the other-side convex section of the engagement sections of the other-side split face in the circumferential direction is C. |
