Abstract: At least one comb-like divider (5) that is movable between an erect position and a lowered position is pivotably mounted on the basket. A pivot member (6) of the divider is pivoted in an elongate hole of at least one support member (8) which is fixed to the basket. At least one shaped projection (10) of the pivot member (6) is capable of slidably co-operating with a cam profile (14) of the member (8). The cam profile terminates upwardly with a recess (15) that is aligned with the elongate hole (9) and receives the shaped projection (10) when the movable divider (5) is in the erect position. The shaped projection (10) is disengageable from the recess (15) with a lifting movement of the pivot member (6) along the elongate hole (9) in such a way as to permit the movable divider (5) to rotate towards the lowered position.