Sheet container, sheet feeder, and image forming system

1. A sheet container, comprising:

a housing;

a stacking part provided in the housing so that recording sheets are stacked on the stacking part;

a contact part to be brought into contact with edges of the recording sheets in a length direction on the stacking part in an attached state in which the contact part is attached into the housing;

a connection member connected to the stacking part or the housing and having an extension part longer than the stacking part in the length direction; and

a retreater that retreats the contact part in the attached state from the extension part with the connection member connected to the stacking part or the housing.

2. The sheet container according to claim 1 , wherein a part of the extension part projects outward from the housing.

3. The sheet container according to claim 1 ,

wherein the contact part is attached to a bottom side in the housing with respect to the stacking part, and

wherein the retreater retreats the contact part in the attached state to a space below a stacking surface of the extension part.

4. The sheet container according to claim 3 ,

wherein the contact part is brought into contact with the edges in a posture in which the contact part extends in a vertical direction, and

wherein the retreater retreats the contact part from the extension part by tilting at least a part of the contact part in a direction intersecting the vertical direction.

5. The sheet container according to claim 4 , wherein the retreater tilts, in the length direction of the recording sheets, an upper part of the contact part in the posture in which the contact part extends in the vertical direction, the upper part being positioned above a middle part of the contact part in the vertical direction.

6. The sheet container according to claim 5 , wherein the retreater tilts the upper part of the contact part in a direction in which the upper part is brought into contact with the recording sheets.

7. The sheet container according to claim 5 , wherein the retreater tilts, at an angle of 80° or larger and 100° or smaller, the upper part of the contact part in the posture in which the contact part extends in the vertical direction.

8. The sheet container according to claim 5 , wherein the extension part has an opening through which the upper part passes.

9. The sheet container according to claim 8 ,

wherein the contact part in the attached state is movable in the length direction relative to the housing, and

wherein the opening is shaped such that the contact part is allowed to move in the length direction.

10. The sheet container according to claim 9 , wherein the opening is formed within a range of the stacking part alone.

11. The sheet container according to claim 9 , further comprising an opening/closing member that opens or closes the opening.

12. The sheet container according to claim 1 ,

wherein the connection member comprises a raising member that raises the extension part relative to the stacking part, and

wherein the retreater retreats the contact part in the attached state to a raising space defined by the raising member.

13. A sheet feeder, comprising:

the sheet container according to claim 1 ; and

a transporter that transports the recording sheets on the stacking part away from the contact part.

14. An image forming system, comprising:

an image forming apparatus that forms images on recording sheets; and

the sheet feeder according to claim 13 that transports the recording sheets to the image forming apparatus.

15. An image forming system, comprising:

an image forming apparatus that forms images on recording sheets; and

the sheet container according to claim 1 that contains the recording sheets output from the image forming apparatus by stacking the recording sheets on the stacking part.

16. A sheet container, comprising:

a housing;

a stacking part provided in the housing so that recording sheets are stacked on the stacking part;

a contact part to be brought into contact with edges of the recording sheets in a length direction on the stacking part in an attached state in which the contact part is attached into the housing;

a connector provided to the stacking part or the housing so that a connection member is connected to the connector in a removable manner, the connection member having an extension part longer than the stacking part in the length direction; and

a retreater that retreats the contact part in the attached state from the extension part when the connection member is connected to the connector.

17. A sheet container, comprising:

a housing;

a stacking part provided in the housing so that recording sheets are stacked on the stacking part;

a contact part to be brought into contact with edges of the recording sheets in a length direction on the stacking part in an attached state in which the contact part is attached into the housing;

a receptacle provided to the stacking part or the housing so that a raising member is attached to the receptacle in a removable manner, the raising member being configured to raise a stacking position of the recording sheets; and

a retreater that retreats the contact part in the attached state to a space below the raised stacking position when the raising member is attached to the receptacle.

18. The sheet container according to claim 17 , further comprising a connector provided to any one of the stacking part, the housing, or the raising member so that a connection member is connected to the connector in a removable manner, the connection member having an extension part longer than the stacking part in the length direction.

19. The sheet container according to claim 18 , wherein the connection member and the raising member are integrated together.