Collection device characterised in that it comprises: - a containment body equipped with an end wall, an entry mouth and elongated in a main direction of extension, said end wall having a recess that extends from said entry mouth parallel to said direction of extension; - an inner body at least partially housed in said containment body to which said inner body is slidably connected along said direction of extension, said inner body being equipped with an inner cavity, with a front opening and with a lower opening which extends from said front opening parallel to said direction of extension; - at least one hatch (18a, 18b) hinged to said inner body and able to close said front opening; - a blade engaging said lower opening, overlapping said end wall and slidably connected to said inner body parallel to said direction of extension; - first motor means to actuate the sliding of said inner body with respect to said containment body parallel to the direction of extension of said containment body, between a first position in which said inner body extends from the entry mouth of said containment body, and a second position in which said inner body is housed in said containment body; - kinematic means to actuate said at least one hatch (18a, 18b) between an open position and a closed position, - second motor means to actuate the sliding of said blade with respect to said inner body parallel to said direction of extension between a third position, in which said blade is distanced from said front opening of said inner body, and a fourth position in which said blade is substantially in abutment on the lower edge of said at least one hatch (18a, 18b), with the latter being in said closed position. - a containment body equipped with an end wall, an entry mouth and elongated in a main direction of extension, said end wall having a recess that extends from said entry mouth parallel to said direction of extension; - an inner body at least partially housed in said containment body to which said inner body is slidably connected along said direction of extension, said inner body being equipped with an inner cavity, with a front opening and with a lower opening which extends from said front opening parallel to said direction of extension; - at least one hatch (18a, 18b) hinged to said inner body and able to close said front opening; - a blade engaging said lower opening, overlapping said end wall and slidably connected to said inner body parallel to said direction of extension; - first motor means to actuate the sliding of said inner body with respect to said containment body parallel to the direction of extension of said containment body, between a first position in which said inner body extends from the entry mouth of said containment body, and a second position in which said inner body is housed in said containment body; - kinematic means to actuate said at least one hatch (18a, 18b) between an open position and a closed position, - second motor means to actuate the sliding of said blade with respect to said inner body parallel to said direction of extension between a third position, in which said blade is distanced from said front opening of said inner body, and a fourth position in which said blade is substantially in abutment on the lower edge of said at least one hatch (18a, 18b), with the latter being in said closed position.