Split outer race, split rolling bearing using same, and manufacturing method for split outer race

1. A split outer race for use in a rolling bearing, wherein

the split outer race is formed by bending a strip-shaped metallic plate into a substantially semicircle shape;

at least one end of the split outer race in a circumferential direction has a concave-and-convex shape including a first slope portion which is inclined to an axial direction and a second slope portion inclined in a direction opposite to a direction in which the first slope portion is inclined; and

an edge portion formed on an inner surface of the one end in the circumferential direction has a round shape.

2. The split outer race according to claim 1 , wherein

the concave-and-convex shape includes a convex part projected in the circumferential direction and a concave part recessed in the circumferential direction,

the first slope portion is defined by a part extending from an apex portion of the convex part to a deepest portion of the concave part, and

the second slope portion is defined by a part extending from the deepest portion of the concave part to a portion provided at a side opposite to the convex part.

3. The split outer race according to claim 2 , wherein

the convex part is projected in the circumferential direction so that a length of a circular arc of the single split outer race is longer than a circumference of the semicircle shape; and

the portion projected from the convex part is placed to an outer diameter side being outer than an outer surface of a semicircular-shaped part.

4. The split outer race according to claim 2 , wherein

a center of the first slope portion in a width direction is located substantially at a center of the strip-shaped metallic plate in a width direction,

a pair of the second slope portions are formed at opposite sides of the first slope portion, and

the second slope portions are extended to opposite ends of the strip-shaped metallic plate in a width direction, respectively.