Stapling device and image forming apparatus having a stapling device

摘要

A device for stapling sheets at a stapling zone includes a conveyor for conveying the sheets to be collated to the stapling zone, a detector for detecting the overall thickness of sheets conveyed by the conveyor to the stapling zone, a first stapler for stapling the sheets collated at the stapling zone, and a second stapler for stapling the sheets collated at the stapling zone. In the device, one of the first and second staplers is selected to be actuated in accordance with the overall thickness of the stack of sheets detected by the detector.