| 主权项 |
1. A post-processing device for applying a post-process to one or more sheets outputted by a device of a preceding stage, the post-processing device comprising:
a CPU; an alignment mechanism which includes a sheet rest to which the one or more sheets outputted by the device of the preceding stage are output, and which applies an alignment process for arranging a current sheet bundle that is a sheet bundle of the one or more sheets and that is output to the sheet rest; an output mechanism which outputs the current sheet bundle that has been subjected to the alignment process by the alignment mechanism outside the sheet rest; and a prestacking mechanism which preforms prestacking of temporarily keeping, upstream of the sheet rest, a next sheet bundle which is a sheet bundle outputted by the device of the preceding stage before the output mechanism outputs the current sheet bundle, and which puts, in the sheet rest, the next sheet bundle that has been subjected to the prestacking after the current sheet bundle is outputted by the output mechanism, wherein the output mechanism includes:
an FD conveyance portion which conveys the current sheet bundle that has been subjected to the alignment process by the alignment mechanism in a downstream direction to an output standby position of the sheet rest;a sheet rest posture changing portion which switches a posture of the sheet rest between a first state in which a sheet outputted by the device of the preceding stage is acceptable and a second state in which the current sheet bundle at the output standby position of the sheet rest is outputtable; anda pushing portion which, when the sheet rest is switched to the second state by the sheet rest posture changing portion, pushes out the current sheet bundle from the output standby position of the sheet rest, wherein the CPU determines whether or not a time when the pushing portion pushes out the current sheet bundle from the output standby position of the sheet rest is later than a time when the prestacking mechanism completes performing the prestacking of the next sheet bundle, and wherein when the CPU determines that the time when the pushing portion pushes out the current sheet bundle is later than the time when the prestacking mechanism completes performing the prestacking of the next sheet bundle, the CPU performs control such that, for the current sheet bundle, an operation of at least one of the alignment mechanism, the FD conveyance portion, the sheet rest posture changing portion, and the pushing portion is switched from a normal operation mode for operation at a normal operation speed to a high-speed operation mode for operation at an operation speed greater than the normal operation speed. |
