| 摘要 |
A rotation transmission device which can quickly change the direction of rotation. It includes a inner ring formed with cam surfaces on its outer periphery, a outer ring formed with a cylindrical surface on its inner periphery, and a plurality of pairs of rollers, each pair being disposed between one of the cam surfaces and the cylindrical surface so as to be circumferentially opposed to each other. A roller separation spring is disposed between each pair of rollers to bias the rollers away from each other so that the rollers are wedged between the cam surface and the cylindrical surface. The rollers are retained by a roller retainer which can change the distance between each pair of circumferentially opposed rollers. By reducing the distance between each pair of rollers with the roller retainer, it is possible to disengage the rollers from the cam surfaces and the cylindrical surface.
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