Device (I) for displacing a door leaf (100) with respect to a transport vehicle body, in particular of the train, tram, metro, trolley bus or bus type, said leaf being movable in a displacement movement (A1) between a closed position and an open position, with reference to an opening (104) provided in the body,
- this device comprising:
- a main body (1),
- fixing means (8) for fixing the leaf on the body,
- drive means (30), able to drive the body under the effect of motor means (106, 108),
- locking means (36), able to move between an active locking position in which they lock the drive means with respect to the body, in the closed position of the leaf, and an inactive release position, in which they allow displacement of the drive means with respect to this body,
- partial opening means (7), able to allow a small movement of the fixing means with respect to the drive means, in the movement direction, from the closed position of the leaf,
- characterized in that
- this device further comprises means (52) for inhibiting the partial opening means (7), able to immobilize the fixing means (8) with respect to the drive means (30), at least in translation in said displacement movement (A1), when the locking means (36) are in their inactive position.