Abstract: An operation group for use with a curtain winding roll is described relative to a first embodiment and a second embodiment (G1, G2), the first for automatically and the second for manually winding up curtains. According to the first embodiment (G1), the operation group includes a mechanism (1), connected to a head (3a) of a curtain winding roll (3). A stop device (90) defines a hub (9) connected to the remaining winding roll head. According to the second embodiment (G2), the operation group has instead a pulley (95) defining the hub (9). The mechanism (1) is operated by first sliding the barrel (5), connected to a first elastic element (2) situated inside the roll (3), axially to disengage a clutch (7), and then by rotating the barrel in one direction or another. When the mechanism is released, a second elastic element (6) slides the barrel (5) back, to re-engage the clutch (7). Adapter rings (30,300) allow use of the operation group with rolls (3) of different diameters.

Abstract: An operation group for curtains with winding roll can be obtained according to a first and second embodiments (G1,G2), for automatically and manually winding up curtains, respectively. According to the first embodiment (G1), the group includes a mechanism (1), connected to a head (3a) of the curtain winding roll (3), and a stop device (90) defining a hub (9) connected to the remaining head. According to the second embodiment (G2), the group includes the same mechanism (1), also connected to a head (3a) of the curtain winding roll (3), and, at the remaining end of the roll, a pulley (95) defining the hub (9). The mechanism (1) is operated by moving first the barrel (5), connected to first elastic means (2) situated inside the roll (3), to slide axially to disengage clutch means (7) and then by rotating the barrel either in one or another direction. When the mechanism is released, the second elastic means (6) move the barrel (5) back, thus engaging again the clutch means (7).

Abstract: An operation group for curtains with winding roll, including a mechanism (1), a stop device (90) and a hub (9), with the mechanism (1) aimed at imposing and stabilizing a pre-established pre-loading value for first elastic means (2), present in the winding roll (3), with the stop device (90) being aimed at locking the winding roll (3) to stabilize the curtain in any unwound position and with the hub (9) aimed at supporting the roll (3) at one of its ends. The above operation group (G) includes the mechanism (1) connected to one end (3a) of the roll (3) and the stop device (90), which is connected to the other end of the roll (3), so as to define the hub (9).