Storage, sheet stacking apparatus, and image forming apparatus

A sheet stacking apparatus comprising:

• a storage to store a sheet to be conveyed by a conveyance unit in a conveyance direction;
• and
• a main body configured to hold the storage in a drawable manner,
• wherein the storage includes:
• a regulating member that is movable and is configured to regulate an edge of the sheet stored in the storage, and
• a switching device configured to switch a state of the regulating member to a first state in which a position of the regulating member is changeable and to a second state in which the position of the regulating member is fixed so that a change in position of the regulating member is prohibited,
• wherein the storage is configured to be held by a main body of the sheet stacking apparatus so as to be movable to a closed position in which the storage is pushed in and movable to a pullout position in which the storage is pulled out,
• wherein the state of the regulating member is switched to the first state and to the second state by an operator operating the switching device when the storage is in the pullout position, and
• wherein, in a state in which the storage is pushed from the pullout position into the closed position while the state of the regulating member is in the first state, the state of the regulating member is switched from the first state to the second state by the main body of the sheet stacking apparatus.

An image forming apparatus, comprising:

• a sheet stacking apparatus including a storage to store a sheet to be conveyed by a conveyance unit in a conveyance direction, and a main body configured to hold the storage in a drawable manner;
• and
• an image forming portion configured to form an image on the sheet conveyed from the sheet stacking apparatus,
• wherein the storage includes:
• a regulating member that is movable and is configured to regulate an edge of the sheet stored in the storage, and
• a switching device configured to switch a state of the regulating member to a first state in which a position of the regulating member is changeable and to a second state in which the position of the regulating member is fixed so that a change in position of the regulating member is prohibited,
• wherein the storage is configured to be held by a main body of the sheet stacking apparatus so as to be movable to a closed position in which the storage is pushed in and movable to a pullout position in which the storage is pulled out,
• wherein the state of the regulating member is switched to the first state and to the second state by an operator operating the switching device when the storage is in the pullout position, and
• wherein, in a state in which the storage is pushed from the pullout position into the closed position while the state of the regulating member is in the first state, the state of the regulating member is switched from the first state to the second state by the main body of the sheet stacking apparatus.