The invention relates to a system for collecting excrements on the floor of an enclosed structure for raising animals, for example cattle, said collecting system comprising (i) a floor cover (1) that includes ducts (12), (ii) collection means for collecting the excrements flowing inside said ducts (12), and (iii) conveyor means (3) for conveying the excrements within the ducts (12) towards the collection means (2). The conveyor means (3) include at least one elongate driving mechanism (31) made of at least one elastomer material； said at least one elongate driving mechanism (31) has two opposite surfaces (3111, 3112), at least one of which is advantageously provided with one-piece studs (312) that are distributed along the length of the surface so as to form the conveying surfaces (3121)； and the at least one elongate driving mechanism (31) has longitudinal reinforcement means (313) for limiting the longitudinal extensibility of the elongate driving mechanism (31).
