Kamskiveindretning

摘要

A cam device comprises an armlike cam follower (34) for moving a lift unit (12) upward and downward, and a plate cam (33) having a cam contour face (51) in contact with the cam follower. The cam is formed in a side surface thereof with a recessed portion having an inwardly facing periphery which provides a guide face (55) extending along the cam contour face. A movable roller (67) is in bearing contact with the guide face. The cam follower and the movable roller are biased toward each other by elastic means.