the invention relates to a conveyor provided with a frame and with at least one carrier guided by a guide mechanism , which can be moved in the longitudinal direction of the conveyor by a driving mechanism . at least some of the carriers support sliding pieces , which can be moved with respect to the carriers in question by a control mechanism , in a direction transversely to the intended direction of movement of the carriers during operation , so as to move objects to be transported with the conveyor during operation . the carriers are guided by a single elongated guide mechanism , while a sliding piece is provided with a receptacle which is open at its bottom side . the sliding piece is movable with respect to a carrier , between a first position , in which the receptacle is closed by a closing mechanism connected to a carrier , and a second position , in which the receptacle in the sliding piece is located beside the closing mechanism and beside the guide mechanism .