Binding apparatus, image forming apparatus incorporating the same, and image forming system

An image forming system comprising:

• an image forming apparatus configured to form an image on a sheet-like medium;
• a post-processing apparatus, including a binding apparatus to bind a sheet bundle including the sheet-like medium on which the image is formed in the image forming apparatus,
• the binding apparatus including:
• a binding tool, configured to execute a first binding process at a first binding position on a sheet bundle and configured to execute a second binding process at a second binding position, different from the first binding position, on the sheet bundle;
• a binding tool driver, configured to apply both a driving force to move the binding tool to the first binding position and to the second binding position, and a driving force to execute the first binding process and the second binding process;
• and
• a main shaft, disposed between the binding tool and the binding tool driver, and configured to support movement of the binding tool to the first binding position and to the second binding position by application of the driving force to move the binding tool.