Image reading apparatus having image reading unit supported by a support shaft and being connected to cables disposed on opposite sides of the support shaft and image forming system including the image reading apparatus

An image forming system comprising:

• an image forming apparatus including an image forming unit configured to form an image on a sheet;
• and
• an image reading apparatus configured to read the image of the sheet on which the image has been formed in the image forming unit,
• wherein the image reading apparatus includes:
• a conveyance roller including an inlet roller configured to receive the sheet from the image forming apparatus and configured to convey the sheet along a conveyance path;
• a casing including a transparent member that is configured to form a part of the conveyance path;
• a reading unit including a reading sensor configured to read an image of the sheet conveyed in the conveyance path through the transparent member, and accommodated in the casing;
• a support shaft configured to support the reading unit in a manner of moving in a moving direction orthogonal to a longitudinal direction of the reading unit;
• a first cable connected to a first connecting portion disposed in the reading unit, the first cable being held by the reading unit on one side in the longitudinal direction with respect to the support shaft;
• a second cable connected to a second connecting portion disposed in the reading unit, the second cable being held by the reading unit on the other side in the longitudinal direction with respect to the support shaft;
• and
• a control substrate including a third connecting portion, to which the first cable is connected, and a fourth connecting portion to which the second cable is connected, and configured to control the reading unit,
• wherein the control substrate is disposed outside of the casing.