Patent ID: 8297615

Claim:
A sheet processing apparatus comprising: an apparatus main body that performs processing for a sheet; a movable member having one end attached to the apparatus main body and another end on a side away from the apparatus main body, the movable member being rotatable around a predetermined portion of the one end and being capable of changing posture from a first state to a second state, the first state being a state where the movable member is inclined with respect to a horizontal plane, the second state being a state where the movable member is less inclined relative to the first state; a sheet stacker having one end on a side closer to the apparatus main body and the other end on a side away from the apparatus main body, and placed on the movable member while being supported by the movable member from below, the sheet stacker being detachable from the movable member and from the apparatus main body, wherein the sheet stacker stacks sheets transported from the apparatus main body while the movable member is in the first state, and wherein the movable member changes posture from the first state to the less inclined second state; and a moving-down unit that moves the movable member down, wherein a cart is placed below the sheet stacker to support the sheet stacker from below, the sheet stacker placed on the cart by moving the movable member, having been moved down by the moving-down unit, from the first state to the second state, and both the one end and the other end of the sheet stacker are placed on the cart when the sheet stacker is placed on the cart by changing posture of the movable member from the first state to the second state.