Finishing apparatus in copying machine

1. A finishing apparatus in a copying machine comprising:

a jogging assembly aligning papers in left and right directions;

a paper contact plate;

a paper pushing device adjacent to the paper contact plate, the paper pushing device being structured to push the papers set in the paper contact plate to a paper stacker;

a tray base in mechanical communication with a driving mechanism which moves the tray base in a direction opposite to the paper pushing device to guide alignment of a set of the papers;

a recess groove provided in the tray base; and

an angle adjusting unit provided in the tray base to adjust an angle of the tray base, the angle adjusting unit comprises a support roller which supports the tray base at a first angle and contacts the recess groove to adjust the tray base to a second angle, different from the first angle,

wherein the tray base has one end connected with one end of a rotational link to reciprocate along the paper contact plate, and the other end of the rotational link is fixed to a fixed shaft and rotates at a predetermined angle around the fixed shaft.

2. The finishing apparatus in a copying machine according to claim 1 , wherein the support roller supports the tray base and the recess groove is formed at a predetermined position on the tray base to recess the support roller.

3. The finishing apparatus in a copying machine according to claim 1 , wherein the rotational link is linked to a paper clamp unit that pushes the papers stacked onto the paper stacker at a position where the tray base moves to the paper stacker while is detached from the paper stacker to the paper contact plate at a position where the tray base is retracted to the paper contact plate.

4. The finishing apparatus in a copying machine according to claim 1 , further comprising a paddle that guides the papers to the paper contact plate.

5. The finishing apparatus in a copying machine according to claim 1 , wherein a paper stacker is provided to move up and down.

6. The finishing apparatus in a copying machine according to claim 1 , further comprising at least one stapler that staples the papers set in the paper contact plate before pushing them to the paper stacker.

7. The finishing apparatus in a copying machine according to claim 1 , wherein the driving mechanism includes at least the rotational link.

8. The finishing apparatus in a copying machine according to claim 7 , further comprising a clamp unit fixed to a clamp unit support provided in a tray unit of the tray base.

9. The finishing apparatus in a copying machine according to claim 8 , wherein when the rotational link rotates counterclockwise to guide papers moving through paper conveying rollers to the paper contact plate, the tray base moves upwardly toward the paper stacker and the clamp unit returns to an original position by action of a spring provided in the clamp unit support.

10. The finishing apparatus in a copying machine according to claim 8 , wherein the clamp unit support is fitted into a support shaft in a state where an end of the clamp unit is elastically supported toward the paper stacker by a spring.

11. The finishing apparatus in a copying machine according to claim 10 , wherein the support shaft is interposed between a clamp unit driving ring and the clamp unit and movably supports the clamp unit and the clamp unit driving ring.

12. The finishing apparatus in a copying machine according to claim 11 , wherein the clamp unit driving ring has a linear ring shape and is fitted into an extension formed at a middle part of the rotational link.

13. The finishing apparatus in a copying machine according to claim 12 , wherein the rotational link rotates to retract and extend the tray base.

14. The finishing apparatus in a copying machine according to claim 12 , wherein the extension freely moves around a slit groove in the clamp unit driving ring so as not to retract the clamp unit.

15. The finishing apparatus in a copying machine according to claim 12 , wherein in a state where the rotational link is retracted, the end of the clamp unit driving ring is caught in the extension.

16. A finishing apparatus in a copying machine comprising:

a jogging assembly aligning papers in left and right directions;

a paper contact plate;

a paper pushing device adjacent to the paper contact plate, the paper pushing device being structured to push the papers set in the paper contact plate to a paper stacker;

a tray base in mechanical communication with a driving mechanism which moves the tray base in a direction opposite to the paper pushing device to guide alignment of a set of the papers;

a recess groove provided in the tray base; and

an angle adjusting unit provided in the tray base to adjust an angle of the tray base, the angle adjusting unit comprises a support roller which supports the tray base at a first angle and contacts the recess groove to adjust the tray base to a second angle, different from the first angle,

wherein the tray base reciprocates along the paper contact plate.

17. A finishing apparatus in a copying machine comprising:

a jogging assembly aligning papers in left and right directions;

a paper contact plate;

a paper pushing device adjacent to the paper contact plate, the paper pushing device being structured to push the papers set in the paper contact plate to a paper stacker;

a tray base in mechanical communication with a driving mechanism which moves the tray base in a direction opposite to the paper pushing device to guide alignment of a set of the papers;

a recess groove provided in the tray base;

an angle adjusting unit provided in the tray base to adjust an angle of the tray base, the angle adjusting unit comprises a support roller which supports the tray base at a first angle and contacts the recess groove to adjust the tray base to a second angle, different from the first angle, wherein:

the driving mechanism includes at least a rotational link;

the driving mechanism further includes a fixed shaft, a gear and a driving motor gear;

the rotational link rotates clockwise or counterclockwise around the fixed shaft;

the gear is provided in the rotational link to form a single body with the rotational link; and

the gear is engaged with the driving motor gear to reciprocate the rotational link at a predetermined angle.