Paper feeding device

摘要

A braking content determiner determines a content of braking control on a rotating operation such that rotation of a paper feeding motor stops within a time required for stopping from a time point of detection of a sheet by a sheet sensor to a time point of passing of a trailing edge of the sheet through a paper feeding roller, the time required for stopping being determined based on a length of the sheet in a sheet conveying direction, a predetermined speed of the paper feeding roller, and a distance between the paper feeding roller and the sheet sensor in a sheet conveying route. A controller performs the braking control on the rotating operation of the paper feeding motor, according to the content determined by the braking content determiner, upon or prior to the detection by the sheet sensor of the sheet sent out by the paper feeding roller.

主权项

1. A paper feeding device comprising:
a paper feeding roller configured to rotate at a predetermined speed and to feed sheets one by one from a paper feed tray on which the sheets are stacked to a sheet conveying route located downstream of the paper feed tray in a sheet conveying direction; a paper feeding motor configured to perform a rotating operation of rotating the paper feeding roller and to maintain a rotational speed of the paper feeding roller at the predetermined speed; an intermediate conveying roller arranged downstream of the paper feeding roller in the sheet conveying direction along the sheet conveying route and configured to feed each of the sheets fed by the paper feeding roller to a position located downstream of the intermediate conveying roller in the sheet conveying direction along the sheet conveying route; a sheet sensor configured to detect a leading edge of the sheet reaching the intermediate conveying roller;
a printer arranged downstream of the intermediate conveying roller in the sheet conveying direction along the sheet conveying route and configured to perform printing on the sheet; and a controller,
wherein the paper feeding roller and the sheet sensor are positioned between the paper feed tray and the printer along the sheet conveying route, andwherein the controller is configured to determine a content of braking control on the rotating operation such that rotation of the paper feeding motor stops within a time required for stopping from a time that the sheet is detected by the sheet sensor to a time that a trailing edge of the sheet passes the paper feeding roller, and such that the paper feeding roller is not rotated by the paper feeding motor when the trailing edge of the sheet passes the paper feeding roller, the time required for stopping being determined based on a length of the sheet in the sheet conveying direction, the predetermined speed, and a distance between the paper feeding roller and the sheet sensor along the sheet conveying route; and perform the braking control on the rotating operation of the paper feeding motor, according to the determined content, upon or prior to the detection, by the sheet sensor, of the sheet fed by the paper feeding roller.