Symmetrical item-gripping, moving and turning mechanism

摘要

The mechanism has grip jaws (19) which move inwards and outwards in relation to the axis and are secured near the edges of planetary pinions in a gear train with sun wheel by holding bolts. The sun wheel and pinions rotate in a two-part frame mounted on a driving shaft. The front part of the frame towards the jaws has angular arms extending from a central portion and on whose ends the planetary pinions rotate. The bolts are formed by cranked levers (13), whose radial portions (28) are axially in line with the front part of the frame (10). Their length in the radial direction is such that in the end position the jaws bear against each other. The axial portions (16,25) of the levers are coupled to the jaws and pinions. Each axial portion of a lever can have a cross-section forming a positive coupling with a recess in the pinion or jaw, this being square, polygonal or round.