Abstract
A retaining unit ( 1 ) for retaining a container ( 4 ), comprising a supporting body ( 7 ), mountable on a movement unit ( 5 ), a gripping element ( 8 ) and a resting element ( 9 ) mounted on the supporting body ( 7 ), The gripping element ( 8 ) comprises a first arm ( 10 ) and a second arm ( 11 ), comprising respective gripping portions delimiting a housing ( 14 ) for the container ( 4 ), having a vertical main line of extension ( 15 ). The first arm ( 10 ) is movable between a first returned position and a first opened wide position. The resting element ( 9 ) has a resting portion ( 35 ), delimiting the housing ( 14 ), in part, and configured to make contact with a lateral surface of the container ( 4 ), is rotatably mounted on the supporting body ( 7 ) according to an axis of oscillation ( 36 ) transversal to the main line of extension ( 15 ), and can oscillate around this between multiple operating positions at each of which the resting portion ( 35 ) is positioned differently and delimits the housing ( 14 ) differently.