To provide a sheet processing device capable of stacking a highly accurately registered sheet bundle on a paper ejecting pan, without reducing productivity in subdivided paper ejection.
This sheet processing device has an intermediate stacker loadable with a plurality of sheets, a sheet carrying-in means of the intermediate stacker, a registering means, a paper ejecting means, and a control means for controlling the carrying-in means, the registering means and the paper ejecting means. The control means controls the paper ejecting means so that the paper ejecting means ejects a second sheet bundle by stacking the second sheet bundle of adding a surplus sheet to the predetermined number of first sheet bundles of preceding to sheets of constituting a surplus on the intermediate stacker, when there is the surplus of subtracting integer times of the predetermined number of sheets from the number of sheets for constituting one group.
MISUHATA TAKESHI
YAMAKAWA MIKIHIKO
ANEZAKI TSUTOMU
SHIMIZU SATOSHI
SUNAYAMA RYUHEI
NIITSUMA MASAHITO
