Patent ID: 8655255

Claim:
A sheet conveyer device, which is configured to convey a sheet in a predetermined sheet conveying direction along a sheet conveying path, the sheet conveyer device comprising: a sheet tray configured to store the sheet in a stack of sheets along a direction of thickness of the sheet; a feeder roller configured to rotate in a position to contact the sheet and feed the sheet in the sheet conveying path; a separator roller, which is arranged in a downstream position along the sheet conveying direction with respect to the feeder roller and configured to separate the fed sheet from the stack of sheets; a roller holder configured to: rotatably support the feeder roller and be coupled with the separator roller, spread from a separator roller side toward a feeder roller side over the separator roller and the feeder roller, and be movable between a first position, in which the feeder roller is in contact with the sheet in the sheet tray, and a second position, in which the feeder roller is apart from the sheet tray; a manipulation arm configured to: extend in a direction parallel to an axial direction of the feeder roller, be coupled to the roller holder, and manipulate the roller holder to move between the first position and the second position; and a driving unit configured to drive the manipulation arm to move the roller holder, wherein the manipulation arm is coupled to the roller holder at a coupled section, which is in a position between the feeder roller and the separator roller and in a position between two tangent planes which are common to the feed roller and the separator roller, wherein at least a portion of the manipulation arm extends, in the axial direction of the feeder roller, between the two tangent planes.