TRAVERSE MOTION FOR USE WITH APPARATUS FOR WINDING CONTINUOUS ELONGATE ELEMENTS

摘要

In a traverse motion for use with an apparatus for winding continuous elongate elements and of the type comprising a scroll cam which is rotatably supported at its ends and whose cylindrical outer surface is formed with an endless helical cam groove consisting of at least one pair of right- and left-handed helical grooves which merge into each other at each of the end portions of the cam, a continuous elongate element guide which has a cam follower fitted into the endless helical cam groove of the scroll cam and which is disposed for a reciprocal movement in parallel with the axis of the cam, and the lead angle of the cam groove over a predetermined distance from the turning point of motion; that is, the point at which the right- and left-hand grooves merge, being increased symmetrically both in the downstream and upstream directions with respect to the turning point so that the motion of the cam follower can be accelerated in the vicinity of the turning point at each of the ends of the cam; the cam follower consists of a cylindrical portion and a ship-shaped portion, and the cross section of the cam groove is so determined that the cam groove guides only the ship-shaped portion of the cam follower almost over the whole length of the cam groove except a predetermined distance in the vicinity of each of the turning point where only the cylindrical portion of the cam follower is securely guided by the cam groove while the ship-shaped portion thereof is released from the cam groove. Therefore, the cam follower can smoothly cross the junctures of the cam groove and can be securely guided by the engagement of the cylindrical portion thereof with the cam groove when it is accelerated at each of the ends of the reciprocal motion.