IMAGE FORMING APPARATUS
FIG3 is a diagram illustrating a driving configuration of a sheet conveyance system of the first embodiment
Next, the sheet conveyance system and the driving structure controlled by the sheet conveyance control portion 206 of the present embodiment will be described with reference to FIG3. The sheet conveyance system provided in the image forming apparatus 1 includes a feed path 49, an image forming path 59 and the duplex conveyance path 79. Sheet conveyance spaces of these paths are defined by guide members supported by the apparatus body 100. A "sheet conveyance direction" in the following description refers to a major conveyance direction in a sheet conveyance path where a member that is related to the conveyance direction is disposed.
diagram
150
fixing motor
51
fixing roller pair
160
discharge motor
40
feed unit
42
registration roller pair
76
duplex sensor
61
post-fixing roller pair conveyance roller pairs
180
duplex motor
120
pre-registration motor
170
motor
72
first duplex roller pair
73
second duplex roller pair
49
feed path
21
intermediate transfer belt
44
registration sensor
140
motor
62
discharge roller pair
75
one-way clutch
71
roller pair
130
registration motor
79
path
74
third duplex roller pair third duplex roller pairs
['1. An image forming apparatus comprising: a first conveyance path (59); an image forming means (10) configured to form an image on a sheet passing through the first conveyance path (59); a first conveyance member (71) configured to receive the sheet from the first conveyance path (59) and convey the sheet to reverse the sheet; a second conveyance path (79) through which the sheet reversed by the first conveyance member (71) is guided to the first conveyance path (59); a first driving source (170) configured to drive the first conveyance member (71); and a controller (200) configured to control the first driving source (170) such that in a case where images are to be formed on a first surface of a preceding sheet, on a first surface of a succeeding sheet fed to the first conveyance path (59) succeeding to the preceding sheet and on a second surface of the preceding sheet, the controller (200) causes the first conveyance member (71) to stop without reversing the preceding sheet (2B in FIG. 10A) in a direction of heading to the second conveyance path (79) in a case where the image has been formed on the first surface of the preceding sheet and permission of preparing the image to be formed on the first surface of the succeeding sheet is not issued yet, and the controller (200) causes the first conveyance member (71) to restart conveyance of the preceding sheet (2B in FIG. 10C) to the second conveyance path (79) based on timing when the image forming means (10) starts preparing the image to be formed on the first surface of the succeeding sheet.', '4. The image forming apparatus according to claim 3, wherein the restriction portion (75) is a one-way clutch.']