Sheet discharge device with sheet size reference members

1. A sheet discharge device, comprising:

housing means for housing a sheet discharged from an image forming apparatus;

matching reference means comprising a plurality of reference members different in matching reference positions for arranging one end of the sheet on said housing means to one predetermined reference member in said reference members;

matching means for moving the sheet to said matching reference means to arrange the one end of the sheet;

post-treatment means moving to a post-treatment position corresponding to a matching reference position for said matching reference means to apply a prescribed post-treatment to the sheet; and

a moving route for said post-treatment means to move to said post-treatment position, said moving route being formed from a notch portion provided in a sheet place portion of said housing means.

2. The sheet discharge device according to claim 1 , further comprising support means for supporting the sheet within said moving route.

3. The sheet discharge device according to claim 2 , wherein said support means comprises a lower support portion which moves following said post-treatment means to move into a portion below a sheet place portion of the housing means, an upper support portion for supporting the sheet at substantially a same height as said sheet place portion, and an inclined support portion for connecting said lower support portion and said upper support portion.

4. The sheet discharge device according to claim 2 , wherein said support means is secured to said post-treatment means.

5. The sheet discharge device according to claim 2 , wherein said support means has a control member for arranging an end of the sheet adjacent to the one end of the sheet arranged by said matching reference means.

6. The sheet discharge device according to claim 2 , wherein said support means has weight means for preventing a curl of the sheet.

7. The sheet discharge device according to claim 1 , further comprising:

support means for movably supporting said plurality of reference members except at least a reference member at a reference position farthest from said matching means between an engaging position engaged with the one end of the sheet on said housing means and a withdrawal position withdrawn from said engaging position; and

moving means for selectively moving said reference member support means so as to differentiate said reference position according to a discharge reference when the sheet is discharged and a sheet size.

8. The sheet discharge device according to claim 7 , further comprising common driving means for moving said post-treatment means to actuate said moving means.

9. The sheet discharge device according to claim 8 , wherein said moving means is formed from a friction member which moves with said post-treatment means, and a contact member which engages said friction member according to movement of said post-treatment means to move said reference member to said engaging position, and disengages from said friction member to move said reference member to the withdrawal position.

10. A sheet discharge device, comprising:

housing means for housing a sheet discharged from an image forming apparatus;

matching reference means comprising a plurality of reference members different in matching reference positions for arranging one end of the sheet on said housing means to one predetermined reference member in said reference members;

matching means for moving the sheet to said matching reference means to arrange the one end of the sheet;

post-treatment means moving to a post-treatment position corresponding to a matching reference position for said matching reference means to apply a prescribed post-treatment to the sheet;

a moving route for said post-treatment means to move to said post-treatment position; and

support means for supporting the sheet within said moving route, said support means being changed in a region for supporting the sheet according to the matching reference position of said matching reference means.

11. A sheet discharge device, comprising:

conveying means for receiving a sheet discharged from an image forming apparatus to convey the sheet to housing means; and

common driving means for driving said conveying means to convey the sheet, and moving post-treatment means to a post-treatment position.

12. The sheet discharge device according to claim 11 , wherein said driving means drives said conveying means with one of normal and reverse driving forces to convey the sheet, and drives said post-treatment means with the other of the normal and reverse driving forces to move the same.

13. An image forming apparatus, comprising:

an image forming portion for forming an image on a sheet;

housing means for housing the sheet discharged from said image forming portion;

matching reference means comprising a plurality of reference members different in reference position for arranging one end of the sheet on said housing means;

matching means for moving the sheet to said matching reference means to arrange the one end of the sheet;

transmission means for transmitting a signal representative of at least a sheet size of the sheet or a discharge reference at which the sheet is discharged;

reference member support means for movably supporting the plurality of the reference members except a reference member at a reference position farthest from said matching means between an engaging position engaging the one end of the sheet on said housing means and a withdrawal position withdrawn from said engaging position;

moving means for moving the reference member supported by said reference member support means between said engaging position and said withdrawal position; and

control means for controlling said moving means so that said reference member is selectively moved to said withdrawal position according to the signal from said transmission means to differentiate said reference position.

14. The image forming apparatus according to claim 13 , further comprising post-treatment means which moves to a post-treatment position corresponding to said reference position to apply a prescribed post-treatment to the sheet.

15. A sheet discharge device, comprising:

housing means for housing a sheet discharged from an image forming apparatus;

matching reference means to be a reference for arranging the sheet on said housing means;

matching reference position changing means for moving said matching reference means to change a matching reference position for arranging the sheet;

matching means for moving the sheet to said matching reference means to arrange the sheet;

post-treatment means which moves to a post-treatment position corresponding to the matching reference position of said matching reference means to apply a prescribed post-treatment to the sheet;

a moving route for said post-treatment means to move to said post-treatment position;

support means for supporting the sheet within said moving route; and

common driving means for actuating said post-treatment means and said matching reference means.

16. A sheet discharge device comprising:

housing means for housing a sheet discharged from an image forming apparatus;

matching reference means to be a reference for arranging the sheet on said housing means;

matching reference position changing means for moving said matching reference means to change a matching reference position for arranging the sheet;

matching means for moving the sheet to said matching reference means to arrange the sheet;

post-treatment means which moves to a post-treatment position corresponding to the matching reference position of said matching reference means to apply a prescribed post-treatment to the sheet;

a moving route for said post-treatment means to move to said post-treatment position;

support means for supporting the sheet within said moving route;

conveying means for receiving the sheet discharged from the image forming apparatus to convey the sheet to said housing means; and

common driving means for driving said conveying means to convey the sheet, and moving said post-treatment means to said post-treatment position.

17. The sheet discharge device according to claim 16 , wherein said driving means drives said conveying means with one of normal and reverse driving forces to convey the sheet, and drives said post-treatment means with the other of the normal and reverse driving forces to move the same.