Sheet conveyance apparatus, image reading apparatus, and image forming apparatus

A sheet conveyance apparatus configured to convey a sheet, the sheet conveyance apparatus comprising:

• a motor unit including a drive motor having a drive shaft, and a motor support member supporting the drive motor;
• a drive pulley fixed to the drive shaft of the drive motor and configured to rotate about a first center line;
• a first driven pulley;
• a second driven pulley;
• an endless first belt wound around the drive pulley and the first driven pulley, the first belt being configured to transmit a rotation of the drive pulley to the first driven pulley;
• an endless second belt wound around the drive pulley and the second driven pulley, the second belt being configured to transmit a rotation of the drive pulley to the second driven pulley;
• a pulley support member supporting the first driven pulley and the second driven pulley;
• a tensioner interposed between the pulley support member and the motor support member, the tensioner being configured to apply a reaction force corresponding to an external force acting on the motor support member to the motor support member;
• a pivot-forming portion configured to form a pivot point corresponding to a third center line, that differs from the first center line, about which the pulley support member and the motor support member are rotatable each other in a state where the external force acting on the motor support member and the reaction force applied to the motor support member from the tensioner are balanced;
• and
• a fixing member configured to fix the pulley support member and the motor support member each other, the fixing member being screwed about a second center line that differs from both the first center line and the third center line after the pivot point is formed between the pulley support member and the motor support member by the pivot-forming portion, and the fixing member being configured to have the pivot-forming portion receive a torque generated between the pulley support member and the motor support member in a state where the fixing member is screwed.