Sheet conveying apparatus and image forming apparatus

An image forming apparatus comprising:

• a sheet stacking portion on which a sheet is to be stacked;
• a sheet feeding portion configured to feed the sheet stacked on the sheet stacking portion;
• a sheet conveyance path through which the sheet fed by the sheet feeding portion is to be conveyed;
• an escape conveyance path branching off from the sheet conveyance path at a branch-off portion;
• a sheet discharge portion to which the sheet conveyed through the escape conveyance path is to be discharged;
• a double-feed detector configured to detect double-feed of the sheet fed by the sheet feeding portion at a detection position located on an upstream side in a conveyance direction with respect to the branch-off portion, with a path length in the sheet conveyance path from the detection position to the branch-off portion being shorter than a length of a conveyable sheet;
• a controller configured to execute, in a case in which the double-feed detector detects the double-feed, a first mode of discharging the sheet for which the double-feed has been detected onto the sheet discharge portion via the escape conveyance path, and a second mode of stopping the sheet for which the double-feed has been detected on the sheet conveyance path without discharging the sheet for which the double-feed has been detected onto the sheet discharge portion;
• and
• an image forming portion configured to form an image on the sheet conveyed through the sheet conveyance path on a downstream side of the branching portion in the conveyance direction,
• wherein the controller is configured to switch a mode between the first mode and the second mode in accordance with timing at which the double-feed detector detects the double-feed.