Sheet transport device, image reading device, and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorMiho Morita
Life of this patent
Estimating the term…
Abstract
A sheet transport device includes a sheet load tray on which a sheet is loaded, a detector that detects whether or not the sheet exists on the sheet load tray, a feeder that feeds the sheet one-by-one from the sheet load tray, and a sheet-load-tray ascend-descend unit that moves the sheet in a sheet loading direction to set an uppermost sheet at a sheet feed position of the feeder, and a controller. In a case where the sheet is detected by the detector, the controller causes the sheet load tray to ascend or descend before the feeder starts to feed the sheet so that ascending-descending operation for moving the sheet load tray between the sheet feed position and a descent position located below the sheet feed position is performed at least once.
Claims14
A sheet transport device comprising:
- a sheet load tray on which a sheet is loaded;
- a tray body that supports the sheet load tray from below, wherein the sheet load tray is rotatably fixed to the tray body;
- a detector that detects whether or not the sheet exists on the sheet load tray;
- a feeder that feeds the sheet one-by-one from the sheet load tray;
- a sheet-load-tray ascend-descend unit that moves the sheet in a sheet loading direction to set an uppermost sheet at a sheet feed position of the feeder, wherein the sheet-load-tray ascend-descend unit comprises an ascend-descend rod that is configured to cause the sheet load tray to ascend and descend between the sheet feed position and a descent position located below the sheet feed position, and the ascend-descend rod is disposed between the sheet load tray and the tray body;
- a controller, wherein in a case where the sheet is detected by the detector, the controller causes the sheet load tray to ascend or descend before the feeder starts to feed the sheet such that ascending-descending operation for moving the sheet load tray between the sheet feed position and the descent position is performed at least once;
- and
- a protrusion that comes into contact with a lowermost surface of a plurality of the sheets constituting a sheet bundle when the sheet load tray descends to the descent position, so as to cause the sheet bundle to bend.
A sheet transport device comprising:
- a sheet load tray on which a sheet is loaded;
- a detector that detects whether or not the sheet exists on the sheet load tray;
- a feeder that feeds the sheet one-by-one from the sheet load tray;
- a sheet-load-tray ascend-descend unit that moves the sheet in a sheet loading direction to set an uppermost sheet at a sheet feed position of the feeder;
- a controller, wherein in a case where the sheet is detected by the detector, the controller causes the sheet load tray to ascend or descend before the feeder starts to feed the sheet such that ascending-descending operation for moving the sheet load tray between the sheet feed position and a descent position located below the sheet feed position is performed at least once;
- and
- a stopper that comes into contact with lateral edges of the sheet in a direction intersecting a feeding direction of the sheet when the sheet load tray ascends to the sheet feed position, so as to cause a sheet bundle to bend,
- wherein the stopper causes the sheet bundle to bend by repeatedly moving in the direction intersecting the feeding direction of the sheet via a missing-tooth gear that is rotationally driven in accordance with ascending of the sheet load tray.
Dependencies are inferred from the claim text.