Image forming apparatus for suppressing discharged paper adhesion

An image forming system comprising:

• a first conveyance unit configured to convey a sheet at a first conveyance speed;
• an image forming apparatus configured to form a toner image on the sheet conveyed at the first conveyance speed by the first conveyance unit;
• a stacking apparatus connected to the image forming apparatus and configured to stack a sheet that the image forming apparatus discharges;
• and
• a control unit configured to control the image forming apparatus and the stacking apparatus,
• wherein the image forming apparatus comprises:
• an image carrier,
• a charging unit configured to uniformly charge the image carrier,
• an exposure unit configured to form an electrostatic latent image by exposing the image carrier,
• a developer unit configured to form a toner image by developing an electrostatic latent image using toner;
• a transfer unit configured to transfer the toner image to the sheet, and
• a fixing unit configured to cause the toner image to be fixed to the sheet by adding heat to the toner image and the sheet, and
• wherein the stacking apparatus comprises:
• a second conveyance unit configured to convey the sheet discharged from the image forming apparatus, and
• a stacking unit configured to stack the sheet conveyed by the second conveyance unit, and
• wherein the control unit is configured to control, in a case where a sheet stacking condition of the stacking unit does not satisfy a predetermined stacking condition, the second conveyance unit to convey the sheet at a second conveyance speed that is faster than the first conveyance speed, and in a case where the sheet stacking condition of the stacking unit satisfies the predetermined stacking condition, the second conveyance unit to convey the sheet at a third conveyance speed that is slower than the second conveyance speed.

An image forming apparatus comprising:

• a first conveyance unit configured to convey a sheet at a first conveyance speed;
• an image forming unit configured to form a toner image on the sheet conveyed at the first conveyance speed by the first conveyance unit;
• a second conveyance unit configured to convey the sheet discharged from the image forming unit;
• a stacking unit configured to stack the sheet conveyed by the second conveyance unit;
• a detection unit configured to detect a height of a pile of sheets stacked in the stacking unit;
• and
• a control unit configured to, in a case where the height detected by the detection unit is less than or equal to a threshold, control the second conveyance unit to accelerate the sheet to a second conveyance speed that is faster than the first conveyance speed, and, in a case where the height detected by the detection unit exceeds the threshold, control the conveyance unit to convey the sheet to a third conveyance speed that is slower than the second conveyance speed.