1. A sheet processing device comprising:
a stacking unit configured to stack thereon one or more conveyed sheets;
a staple unit configured to staple a bundle of sheets stacked on the stacking unit;
a moving unit configured to move the staple unit to a staple position; and
a projecting and retrieving unit configured to project and retrieve the stacking unit in a space overlapped with a motion space for the staple unit to move therein, wherein:
the stacking unit includes a fixed tray and a movable tray,
the projecting and retrieving unit projects and retrieves the movable tray along the fixed tray,
the projecting and retrieving unit retrieves the movable tray from the motion space, in order to move the staple unit by the moving unit, and
the moving unit as well as the projecting and retrieving unit are driven by the same drive source.
2. The sheet processing device according to claim 1, further comprising:
a first alignment unit configured to align the delivered sheets in a sheet conveying direction by abutting with an end of sheets stacked on the stacking unit; and
an abut member configured to move the delivered sheets to abut with the first alignment unit, wherein
the abut member abuts with the sheet on a surface of the fixed tray to move the same.
3. The sheet processing device according to claim 2, further comprising
a second alignment unit including a movable portion configured to move toward a direction orthogonal to the sheet conveying direction in order to align the sheets, wherein
the position which corresponds to the first staple position is set on the basis of a fixed portion of the second alignment unit.
4. The sheet processing device according to claim 1, wherein a level of stacked sheets on the movable tray is the same as that of the fixed tray.
5. The sheet processing device according to claim 1, wherein the moving unit disposes the staple unit at a position which corresponds to a first staple position located outside of the motion space, while the sheet is stacked on the stacking unit.
6. An image forming system comprising:
a sheet processing device; and
an image forming apparatus configured to form an image on a sheet, wherein the sheet processing device includes:
a stacking unit configured to stack thereon one or more conveyed sheets;
a staple unit configured to staple a bundle of sheets stacked on the stacking unit;
a moving unit configured to move the staple unit to a staple position; and
a projecting and retrieving unit configured to project and retrieve the stacking unit in a space overlapped with a motion space for the staple unit to move therein, wherein:
the stacking unit includes a fixed tray and a movable tray,
the projecting and retrieving unit projects and retrieves the movable tray along the fixed tray,
the projecting and retrieving unit retrieves the movable tray from the motion space, in order to move the staple unit by the moving unit, and the moving unit as well as the projecting and retrieving unit are driven by the same drive source.
7. The image forming system according to claim 6, wherein the sheet processing device is arranged in a space of the image forming apparatus.
8. The image forming system according to claim 6, further comprising:
a first alignment unit configured to align the delivered sheets in a sheet conveying direction by abutting with an end of sheets stacked on the stacking unit; and
an abut member configured to move the delivered sheets to abut with the first alignment unit, wherein
the abut member abuts with the sheet on a surface of the fixed tray to move the same.
9. The image forming system according to claim 8, further comprising
a second alignment unit including a movable portion configured to move toward a direction orthogonal to the sheet conveying direction in order to align the sheets,
wherein the position which corresponds to the first staple position is set on the basis of a fixed portion of the second alignment unit.
10. The image forming system according to claim 6, wherein a level of stacked sheets on the movable tray is the same as that of the fixed tray.
11. The image forming system according to claim 6, wherein the moving unit disposes the staple unit at a position which corresponds to a first staple position located outside of the motion space, while the sheet is stacked on the stacking unit.
12. A sheet processing method capable of realizing one-position parallel stapling, one-position slanted stapling, and two-position stapling, implemented by a sheet processing device which includes: a stacking unit configured to stack thereon one or more conveyed sheets; a staple unit configured to staple a bundle of sheets stacked on the stacking unit; a moving unit configured to move the staple unit to a staple position; and a projecting and retrieving unit configured to project and retrieve the stacking unit in a space overlapped with a motion space for the staple unit to move therein, wherein the stacking unit includes a fixed tray and a movable tray, the projecting and retrieving unit projects and retrieves the movable tray along the fixed tray, the projecting and retrieving unit retrieves the movable tray from the motion space, in order to move the staple unit by the moving unit, and the moving unit as well as the projecting and retrieving unit are driven by the same drive source, the method comprising:
projecting maximally the stacking unit by the projecting and retrieving unit, and disposing the staple unit at a first staple position located outside of the motion space, when stacking the sheets on the stacking unit;
stapling the bundle of sheets at the first staple position, after projecting maximally the stacking unit and disposing the staple unit at the first staple position, if the one-position parallel stapling is to be performed;
rotating the staple unit by an angle corresponding to a staple angle for the slanted stapling, retrieving the stacking unit by the projecting and retrieving unit to a position where the stacking unit does not hinder a rotation of the staple unit, and stapling the bundle of sheets at a second staple position, after projecting maximally the stacking unit and disposing the staple unit at the first staple position, if the one-position slanted stapling is to be performed;
rotating the staple unit to a position where a staple needle of the staple unit becomes parallel to a rear end of the bundle of sheets, retrieving the staple unit maximally by the projecting and retrieving unit to a position where the stacking unit does not hinder the motion of the staple unit, and stapling the bundle of sheets at a third staple position and a fourth staple position, after projecting maximally the stacking unit and disposing the staple unit at the first staple position, if the two-position stapling is to be performed.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-10. (canceled)
11. A dishwasher comprising:
a washing container for receiving items to be washed by the dishwasher;
a circulatory pump for circulating a rinsing liquid into contact with items received in the washing container; and
a comminution device for comminuting rinsing residue, the comminution device and the circulatory pump being operatively interconnected in a manner such that the communition device is at least temporarily driven by the circulatory pump.
12. The dishwasher according to claim 11, and further comprising a safety-friction clutch, wherein a drive coupling between the comminution device and the circulatory pump is made by means of the safety-friction clutch.
13. The dishwasher according to claim 11, wherein the comminution device and the circulatory pump are operatively interconnected such that the drive of the comminution device is effected by means of an impeller of the circulatory pump.
14. The dishwasher according to to claim 11, wherein the comminution device and the circulatory pump are operatively interconnected such that a drive coupling between the comminution device and the circulatory pump is made by means of a connecting shaft that is a selected one of axial displaceable and non-axially displaceable.
15. The dishwasher according to claim 14, wherein the connecting shaft is selectively axially displaceable into engagement with the circulatory pump such that a drive coupling between the comminution device and the circulatory pump is made by means of an axial displacement of the connecting shaft into engagement with the circulatory pump and a drive coupling between the comminution device and the circulatory pump is broken as desired by means of an axial displacement of the connecting shaft out of engagement with the circulatory pump.
16. The dishwasher according to claim 15, wherein the connecting shaft between the comminution device and the circulatory pump is selectively couplable to the hub of the impeller of the circulatory pump.
17. The dishwasher according to according to claim 14, wherein the comminution device and the circulatory pump are operatively interconnected by means of a coupling regulator operable to selectively effect a drive coupling between the comminution device and the circulatory pump and to break a drive coupling between the comminution device and the circulatory pump, wherein the coupling regulator includes a selected one of a combination of a positive temperature coefficient and an actuating element consisting of a shape memory alloy and the absence of a combination of a positive temperature coefficient and an actuating element consisting of a shape memory alloy.
18. The dishwasher according to claim 17, wherein the coupling regulator includes an actuating elemnt and further comprising at least two radial projections provided at the connecting shaft between the comminution device and the circulatory pump, the actuating element of the coupling regulator being located between the at least two radial projections for engaging the at least two radial projections to effect the axial displacement of the connecting shaft.
19. The dishwasher according to claim 14, wherein the drive coupling between the comminution device and the circulatory pump can be made or broken by an electromagnetic switch which effects the axial displacement of the connecting shaft between the comminution device and the circulatory pump by action of electromagnetic force.
20. The dishwasher according to claim 17, wherein the comminution device is disposed inside and the coupling regulator is disposed outside the washing container of the dishwasher.