Processing apparatus and image forming apparatus

1. A processing apparatus including a first processing unit and a second processing unit that are stacked vertically on a side of one lateral face of a main apparatus to perform image forming processing to a sheet, the main apparatus being provided with a sheet tray having a base end part supported at the lateral face, wherein

the second processing unit is disposed on the first processing unit, the second processing unit being slidable between a connecting position of connecting to the main apparatus and a predetermined separate position away from the main apparatus in a toward-away direction to move toward or away from the main apparatus, the second processing unit having a space part, in which at least part of the sheet tray can be placed when the second processing unit is at the connecting position, and

the space part has openings on a lateral face of the second processing unit that is on a side of the main apparatus facing the main apparatus and on at least one lateral face other than the lateral face on the side of the main apparatus.

2. The processing apparatus according to claim 1 , wherein the sheet tray is configured to be rotatable around the based end part as a supporting point between a protruding position that protrudes in a horizontal direction and a storage position along the lateral face of the main apparatus.

3. The processing apparatus according to claim 2 , wherein the first processing unit has an opening at a top face thereof, through which a member relating to image forming processing is loaded and unloaded, the opening being exposed when the second processing unit is disposed at the separate position and the sheet tray is disposed at the storage position.

4. The processing apparatus according to claim 1 , wherein the space part penetrates through in the toward-away direction.

5. The processing apparatus according to claim 1 , wherein the space part has openings at the lateral face of the second processing unit that is on the side of the main apparatus, and at a lateral face on a front face side of the second processing unit.

6. The processing apparatus according to claim 4 , wherein the space part penetrates through in the toward-away direction, and the space part further has an opening at a lateral face of the second processing unit on a front face side of the second processing unit.

7. The processing apparatus according to claim 1 , wherein the second processing unit is supported at a top face of the first processing unit, and is slidable in the toward-away direction.

8. The processing apparatus according to claim 1 , wherein the second processing unit is disposed upward away from the first processing unit, and when the second processing unit is disposed at the connecting position, the sheet tray is disposed between the first processing unit and the second processing unit.

9. An image forming apparatus, comprising:

a main body that performs image forming processing to a sheet, the main body being provided with a sheet tray having a base end part supported at one lateral face of the main body; and

a first processing unit and a second processing unit that are stacked vertically on a side of the lateral face of the main body,

wherein

the second processing unit is disposed on the first processing unit, the second processing unit being slidable between a connecting position of connecting to the main body and a predetermined separate position away from the main body in a toward-away direction to move toward or away from the main body, the second processing unit having a space part, in which at least part of the sheet tray can be placed when the second processing unit is at the connecting position, and

the space part has openings at a lateral face of the second processing unit that is on a side of the main body facing the main body and on at least one lateral face other than the lateral face on the side of the main body.

10. The image forming apparatus according to claim 9 , wherein the sheet tray is configured to be rotatable around the based end part as a supporting point between a protruding position that protrudes in a horizontal direction and a storage position along the lateral face of the main body.

11. The image forming apparatus according to claim 10 , wherein the first processing unit has an opening at a top face thereof, through which a member relating to image forming processing is loaded and unloaded, the opening being exposed when the second processing unit is disposed at the separate position and the sheet tray is disposed at the storage position.

12. The image forming apparatus according to claim 9 , wherein the main body has a door capable of being open/closed at the lateral face of the main body.

13. The image forming apparatus according to claim 12 , further comprising a first lock mechanism to lock the door in a closed state to the main body and a second lock mechanism to lock the second processing unit at the connecting position, wherein the first lock mechanism and the second lock mechanism are configured in an interlocking manner.

14. The image forming apparatus according to claim 9 , wherein the space part penetrates through in the toward-away direction.

15. The image forming apparatus according to claim 9 , wherein the space part has openings at the lateral face of the second processing unit that is on a side of the main body, and at a lateral face on a front face side of the second processing unit.

16. The image forming apparatus according to claim 14 , wherein the space part penetrates through in the toward-away direction, and the space part further has an opening at a lateral face of the second processing unit on a front face side of the second processing unit.

17. The image forming apparatus according to claim 9 , wherein the second processing unit is supported at a top face of the first processing unit, and is slidable in the toward-away direction.

18. The image forming apparatus according to claim 9 , wherein the second processing unit is disposed upward away from the first processing unit, and when the second processing unit is disposed at the connecting position, the sheet tray is disposed between the first processing unit and the second processing unit.