Rotation unit, post-processing device, and conveying force applying member

A rotation unit configured to rotate to apply conveying force to a medium, the rotation unit comprising:

• a conveying force applying unit including at least one contact part that is arranged in a rotation direction and comes into contact with the medium, and configured to apply the conveying force to the medium using the contact part;
• a rotation shaft to which the conveying force applying unit is attached;
• a holding unit provided between the rotation shaft and the conveying force applying unit, and configured to hold the conveying force applying unit;
• and
• a fixing unit configured to fix the conveying force applying unit to the rotation shaft, wherein
• the holding unit includes a shaft hole through which the rotation shaft passes, and is fixed in a state of being attached to the rotation shaft by sliding in an axis direction of the rotation shaft,
• the conveying force applying unit includes:
• a base portion provided with a fitting hole that fits an outer circumference of the holding unit and an opening portion in communication with the fitting hole;
• and
• the contact part that is provided on and protrudes from the base portion,
• the base portion is configured to deform, and
• the conveying force applying unit is configured to be attached to and detached from the holding unit via the opening portion in a direction crossing the axis direction of the rotation shaft.