Clearing device

A clearing device, configured for clearing and/or maintaining of filter basins, comprising at least one carrier, at least one undercarriage, at least one removal device, at least one driving device and at least one pushing and/or guiding device, wherein the removal device is situated in the front and/or before the undercarriage and/or in front of an axle of the undercarriage in the travel and/or removal direction, the pushing and/or guiding device is provided at the rear in the travel and/or removal direction and wherein the removal device comprises a platform on which a drivable and/or driven removal means is circulating, wherein the drivable and/or driven removal means is a drivable and/or driven flexible circulating chain and/or a flexible circulating belt configured to remove material from a bottom of the filter basin, transport the material away and/or dispose of the material, and wherein the platform of the removal device is formed by a frame on which at least three guide rollers guide the flexible circulating chain and/or the flexible circulating belt and removal elements and/or scrapers are provided on the flexible circulating chain and/or the flexible circulating belt, which are configured to remove the material and transport the material away, and wherein one of the guide rollers is constructed in a swiveling manner, in a range of up to 35 degrees, in order to change a discharge width for the removed material and to ensure that a mound created by the removed material is pushed further onto an unworked area and/or to prevent the material from falling back onto a worked area.