Cam device, work supply device and separating device

A cam device configured to convert a rotational movement of a drive unit to a linear movement on a driven side, the cam device comprising:

• a drive cam configured to be driven by the drive unit and to reciprocally rotate in forward and reverse directions within a predetermined angle range around a rotation axis;
• a first follower configured to intermittently reciprocate linearly by the drive cam;
• a second follower configured to intermittently reciprocate linearly by the drive cam;
• a holding cam configured to be rotationally driven integrally with a rotational reciprocating movement of the drive cam about the rotation axis, the holding cam having an arcuate outer peripheral surface which is discontinuous on a side facing the drive cam;
• a first restriction roller provided on the first follower and configured to restrict a movement of the first follower by coming in contact with the holding cam;
• and
• a second restriction roller provided on the second follower and configured to restrict a movement of the second follower by coming in contact with the holding cam,
• wherein the first follower and the second follower are arranged to be capable of moving linearly at opposite positions on both sides of a rotation axis of the drive cam, and
• wherein the first follower and the second follower are capable of being cam-engaged with the driven cam alternatively and independently of each other, and configured such that
• when the drive cam is in an engaged state with the first follower, the drive cam is in an engagement release state with the second follower and the holding cam comes into contact with the second restriction roller to hold the second follower at a predetermined position and the holding cam is separated from the first restriction roller and is in a holding release state with the first follower, and
• when the drive cam is in an engaged state with the second follower, the drive cam is in an engagement release state with the first follower and the holding cam comes into contact with the first restriction roller to hold the first follower at a predetermined position and the holding cam is separated from the second restriction roller and is in a holding release state with the second follower.