(57) An automatic device for loading and unloading stacks of reels of yarn comprises a
centering mechanism (8, 10-13, 17, 18, 20, 21, 100) of a vertical reel-holding rod
(3) on which the reels (4) are, or are about to be, stacked; the centering mechanism
(8, 10-13, 17, 18, 20, 21, 100) comprises a vertical stem (13) on which a stack of
reels to be moved is transferred so as to move it from a rod (3) to be unloaded to
a rod (3) to be loaded, and a mechanism (24-29, 32, 35, 40) for removing and positioning
the stack of reels that comprises an element (24) for removing the stack of reels
(4) that is made to slide vertically to accomplish the removal or the positioning
of the stack itself; the centering mechanism (8, 10-13, 17, 18, 20, 21, 100) comprises
sensor means (18, 20, 21, 100) suitable for detecting the vertical alignment of the
stem (13) with the reel-holding rod (3) and to operate the activation of the removal
and positioning mechanism (24-29, 32, 35, 40); the removal element of the removal
and positioning mechanism (24-29, 32, 35, 40) is constituted by a pair of jaws (24)
suitable for grasping a reel (4) at the base of the stack.
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