Image forming apparatus

An image forming apparatus, comprising:

• an image forming unit configured to form an image on a sheet;
• a first roller configured to convey the sheet and including a first shaft, and a plurality of first roller bodies fixed on the first shaft and arranged at intervals in an axial direction;
• a second roller configured to convey the sheet and including a second shaft, and a plurality of second roller bodies fixed on the second shaft and arranged between the plurality of first roller bodies in the axial direction, wherein the first roller and the second roller are arranged so that the second roller body is put into a space between the plurality of first roller bodies and an outer periphery of the plurality of the first roller bodies is out of contact with an outer periphery of the plurality of the second roller bodies;
• a bearing portion configured to bear the second shaft;
• a frame configured to movably support the bearing portion;
• an elastic member provided between the flame and the bearing portion and configured to urge the second roller so as to bring the second shaft of the second roller close to the first shaft of the first roller;
• a positioning portion configured to receive the urging force of the elastic member and to position the second shaft with respect to the first shaft in a direction closing to the first shaft;
• a first regulating member arranged between the first roller bodies and configured to be brought into contact with the first shaft to regulate movement of the first shaft;
• and
• a second regulating member arranged between the second roller bodies so that clearance is set between the second shaft of the second roller and the second regulating member and configured to regulate movement of the second shaft of the second roller, wherein
• the second regulating member is configured to be capable of contacting with the second shaft to regulate, in a state that the second roller body is put into the space between the plurality of first roller bodies, movement of the second shaft in a direction of increasing the distance between the first shaft and the second shaft while the movement of the first shaft is regulated by the first regulating member.

An image forming apparatus, comprising:

• an image forming unit configured to form an image on a sheet;
• a roller pair configured to discharge the sheet having the image formed thereon, the roller pair having a first roller including a plurality of first roller bodies arranged at intervals in an axial direction and a second roller including a plurality of second roller bodies arranged between the plurality of first roller bodies in the axial direction, wherein the first roller and the second roller are arranged so that each of the second roller bodies is put into a space between two of the plurality of first roller bodies and an outer periphery of the plurality of the first roller bodies is out of contact with an outer periphery of the plurality of the second roller bodies;
• a support portion configured to support the first roller and the second roller so as to be able to increase or decrease a distance between an axis line of the first roller and an axis line of the second roller;
• an elastic member configured to urge the second roller so as to bring a shaft of the second roller close to a shaft of the first roller;
• a first regulating member arranged between the first roller bodies and configured to be brought into contact with the shaft of the first roller to regulate movement of the shaft of the first roller;
• a stacking unit on which the sheet discharged by the roller pair is stacked;
• an U-shaped member arranged between the second roller bodies so that clearance is set between the shaft of the second roller and an inner portion of the U-shaped member and configured to regulate movement of the shaft of the second roller, wherein
• the inner portion of U-shaped member is configured to be capable of contacting with the shaft of the second roller to regulate, in a state that the second roller body is put into the space between the plurality of first roller bodies, movement of the second roller against the urging force of the elastic member in a direction of increasing the distance between the axis line of the first roller and the axis line of the second roller while the movement of the shaft of the first roller is regulated by the first regulating member, and
• the inner portion of U-shaped member being configured to regulate upstream movement in a sheet conveying direction of the shaft of second roller;
• and
• a jamming prevention surface disposed on an outer portion of the U-shaped member and configured to prevent the sheet stacked on the stacking unit from jamming at the second roller.