Needle actuation device for kitting machines for hosiery or other articles

摘要

A needle actuation device comprises cam box facing a needle holder and supporting lowering cam whose profile is inclined with respect to needle holder motion. The lowering cam profile is engageable by needle or pusher heel protruding from the holder. The lowering cam is movable along adjustment direction to vary length of knitting loops. Adjusters vary inclination of the lowering cam profile. A needle actuation device comprises a cam box (2) facing a needle holder. Lowering cam(s) is supported at the cam box and has a profile (5) inclined to a motion direction of the holder with respect to the cam box. The lowering cam profile is engageable by heels or needle pushers protruding from the holder toward the cam box. The needle holder has accommodation slots that are parallel to each other and lie at right angles to the motion direction. Each slot accommodates the respective needles so as to be slidable along the slot after engaging yarn at the feed of a knitting machine. New loops of knitting are produced by lowering previously formed loops of knitting. The lowering cam is supported to rotate about an axis perpendicular to a surface portion of the holder facing to the cam box. A first adjuster (10) adjusts a position of the lowering cam with respect to the holder along an adjustment direction (11) with component(s) parallel to the sliding direction of the needles that engage the lowering cam along the slots to vary loop lengths. A connector (12) connects a portion of the lowering cam spaced from the rotation axis with respect to the cam box as a translational motion of the lowering cam along the adjustment direction. A second adjuster (14) is connected to the lowering cam whose translational motion is along the adjustment direction with respect to the cam box.