PAPER FEEDING DEVICE AND IMAGE FORMING APPARATUS

摘要

When a paper feeding ray is set, an arm of a one-armed pinion makes a contact with an abutting member formed in a main unit to which the paper feeding tray is attached. When the paper feeding tray is pushed in, the arm is pushed by the abutting member, the one-armed pinion rotates as the rack member moves, and the one-armed pinion moves in a direction into the paper feeding tray. When a spring is stretched, a bottom plate push-up member rotates up on its rotation center and rises by a predetermined angle to press a bundle of stacked paper sheets against a feed roller, so that the paper sheets can be fed.

主权项

1. A paper feeding device that feeds paper sheets placed on a bottom plate of a bottom plate of a paper housing member by pushing up a bottom plate push-up member provided in a position under the bottom plate by a predetermined rotation force to cause the paper sheets to make a contact with a paper feeding roller positioned above the paper sheets, the paper feeding device comprising a rotator configured to rotate the bottom plate by rotating the bottom plate push-up member, wherein
the rotator comprises
a rack member that is positioned between an axis of rotation of the bottom plate and the bottom plate push-up member and that is movable along a side surface of the bottom plate,a one-armed pinion that is engaged with the rack member and that moves the rack member, anda force exerting member that is attached to each of an end of the bottom plate push-up member and an end of the rack member and exerts force to pull the rack member toward the bottom plate push-up member, the one-armed pinion comprises
a pinion gear unit that is engaged with the rack member, andan arm that is provided as protruding from the pinion gear unit toward a device to which the paper feeding device is attached, and when the paper feeding device is set in the device to which the paper feeding device is attached, the arm of the one-armed pinion makes a contact with an abutting member provided to the device to which the paper feeding device is attached, and is pushed to turn, so that the rotation force that rotates the bottom plate push-up member is caused.