Sheet-type medium deviation correction device and automatic teller machine

A skew-correction device for sheet-type mediums, comprising:

• an upper holding plate and a lower holding plate for holding the following parts and forming a conveying passage for the sheet-type mediums,
• a front guide wheel set, at least comprising one front guide wheel, wherein the one front guide wheel is mounted at a front end of the upper holding plate or a front end of the lower holding plate for guiding the mediums into the conveying passage,
• a front end position detecting element disposed at the front end of each of the upper holding plate and the lower holding plate for detecting whether a medium has entered into the conveying passage or not,
• a side edge position detecting unit, comprising at least two position detectors, wherein the at least two position detectors are distributed at a certain interval side edges of the upper holding plate and the lower holding plate, and the at least two position detectors are arranged in a direction parallel to the side edges, the at least two position detectors are configured to detect whether an edge of the medium is aligned with the side edge of the upper holding plate or the side edge of the lower holding plate,
• at least one skew-correction assembly, comprising a belt and a pair of pulleys, wherein a conveying direction of the belt is perpendicular to the side edge of the upper holding plate or the side edge of the lower holding plate, and
• at least one conveying assembly, comprising a pair of conveying wheels, wherein a conveying direction of the conveying wheels is perpendicular to the conveying direction of the belt.