Sheet stacking device, sheet processing device, and image forming apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 29, 2012
Grant Date -
Apr 7, 2011
app pub date -
Sep 28, 2010
filing date -
Oct 2, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to stack a larger number of sheets on trays by reducing a total thickness of the trays and enabling the trays to ascend and descend actually over long distances, a sheet stacking device includes an upper-tray and a lower-tray which are ascendible and descendible and on which sheets delivered from a delivery roller pair are stacked, a motor and a belt for allowing both the trays to ascend and descend, a clutch for disconnecting the upper-tray and the belt from each other, and a claw and a rack for stopping self-weight descent of the upper-tray when the clutch effects the disconnection. A clearance between the upper-tray under the disconnection by the clutch and in the stop of the self-weight descent by the claw engaged with the rack and the lower-tray connected to the belt is adjustable by ascent and descent of the lower-tray by the motor.
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