A variable-capacity store (1) for objects (2), wherein an endless conveyor (8) defines a conveying branch (9), for conveying a mass of objects (2), and a return branch (12), which respectively form a first and a second spiral (26, 27) of given lengths, each of which coils about a respective fixed first drum (18; 21) and a respective second drum movable to and from the relative first drum (18; 21); and wherein the second drums (19, 20) are located on the same side with respect to the relative first drums (18, 21), and are connected to each other by a transmission (47; 63; 68) powered by a single reversible motor to equally and oppositely adjust the distances between the second drums (19, 20) and the relative first drums (18, 21). |