Perfected winding device
A winding device for loads includes a reel-holder roll adapted for receiving a reel of an extensible plastic film; a vertical column, along which the reel-holder roll is movable; and a lifting plane adapted to receive a load movable along the column, so that the winding device can be used as both a winder and a lifter for forming the load.
1. A winding device adapted to wrap a load with an extensible plastic film, comprising:
a reel-holder roll adapted to receive a reel of the extensible plastic film;
a vertical column having a sliding cavity therein, the sliding cavity extending along the column;
a lifting plane movable along the column, the reel-holder roll being joined to the lifting plane; and
a sliding cursor engaged in the sliding cavity of the column and coupled to the lifting plane,
wherein a movement of the lifting plane causes a simultaneous movement of the reel-holder roll,
wherein the reel-holder roll is positioned on an upper surface of the lifting plane,
further comprising a second reel-holder roll positioned below the lifting plane,
wherein the lifting plane and the second reel-holder roll are joined to one another and rotatably coupled to the column,
whereby the lifting plane and the second reel-holder roll are movable between a first lifting position, in which the lifting plane is orthogonal to the column, and a second winding position, in which the lifting plane is parallel to the column.
2. The winding device according to claim 1 , wherein the lifting plane is coupled to the sliding cursor by a roto-translation coupling or a device causing a rotation, further comprising a roto-translation coupling comprising a roto-translation joint that couples the cursor with the lifting plane.
3. The winding device according to claim 2 , wherein the roto-translation joint comprises a roto-translation guide integral with the sliding cursor and two pins integral with the lifting plane.
4. The winding device according to claim 3 , wherein the roto-translation guide has an open neck configured to enable the two pins to move freely therein, the two pins being aligned with each other and spaced on a plane perpendicular to the lifting plane, thereby enabling a disengagement of at least one of the two pins during passage from the first lifting position to the second winding position.
5. The winding device according to claim 1 , wherein a longitudinal development axis of the second reel-holder roll is parallel to the lifting plane.
6. The winding device according to claim 1 , further comprising a pre-stretching device of the extensible plastic film.