Relay conveyance device, image forming system, combination of image forming system, and sheet conveyance device

A relay conveyance device arranged between an image forming device which forms an image on a sheet and a post-processing device applying predetermined post-processing to a sheet to relay conveyance of a sheet from the image forming device to the post-processing device, the post-processing device having a carry-in port which allows carry-in of a sheet, the relay conveyance device comprising:

• a device main body in which a relay conveyance path is provided as a conveyance path of a sheet fed out from the image forming device;
• a plurality of unit supporting portions provided, at a downstream end of the device main body in a sheet conveying direction, at positions different from each other in the height direction;
• a discharge unit supported by any one of the plurality of unit supporting portions to receive a sheet having passed through the relay conveyance path and discharge the sheet toward the carry-in port;
• a processing unit attached to the discharge unit to apply predetermined processing to the sheet;
• a processing unit adjustment portion capable of adjusting a height direction inclination of the processing unit relative to a sheet width direction orthogonal to both the height direction and the sheet conveying direction such that the processing unit takes a horizontal reference position in a state where the processing unit is attached to the discharge unit;
• and
• a discharge unit adjustment mechanism capable of adjusting an inclination in the height direction of the discharge unit relative to the sheet width direction such that the processing unit adjusts the reference position in a state where in each of the plurality of unit supporting portions, the processing unit is supported by the discharge unit.