Paper processing apparatus

1. A paper processing apparatus, comprising:

a perforation unit configured to include a rotary blade for perforating conveyed paper in a direction parallel to a conveyance direction and be capable of moving the rotary blade in a direction orthogonal to a conveyance path of the paper;

a skew detection section configured at the upstream side of the perforation unit of the conveyance path to detect the skew of the paper;

a skew correction mechanism configured to incline the perforation unit and incline the rotary blade to an angle orthogonal to the front end of the paper according to the skew amount of the paper detected by the skew detection section; and

a control section configured to control the position of the rotary blade and move the rotary blade to a perforation processing position before the paper is conveyed to the perforation unit.

2. The paper processing apparatus according to claim 1 , wherein

the rotary blade is rotated through the conveyance of the paper to perforate the paper.

3. The paper processing apparatus according to claim 1 , further comprising:

a motor configured to rotate the rotary blade; wherein

the rotary blade is rotated in such a direction that encourages the conveyance of the paper to perforate the paper.

4. The paper processing apparatus according to claim 1 , wherein

the perforation unit includes the rotary blade and a moving body which supports the rotary blade and moves in a direction orthogonal to the conveyance path.

5. The paper processing apparatus according to claim 1 , wherein

the control section controls to move the rotary blade to a perforation processing start position according to the perforation processing position, and controls to gradually move the rotary blade according to the skew amount detected by the skew detection section and the skew direction during a period when the paper is conveyed from the perforation processing start position to the perforation processing completion position.

6. The paper processing apparatus according to claim 1 , further comprising:

a moving mechanism configured to move the whole perforation unit in a direction orthogonal to the conveyance path; wherein

the control section controls, in a case in which the paper is conveyed in a state of being shifted from a regular conveyance state, the moving mechanism to move the perforation unit to a position for correcting the deviation.

7. The paper processing apparatus according to claim 6 , wherein

the perforation unit further includes a sensor group for detecting the end in the width direction of the conveyed paper; and

the control section controls the moving mechanism to move, in a case in which the position in the width direction of the paper detected by the sensor group is shifted from the regular conveyance state, the perforation unit according to the deviation of the paper.

8. The paper processing apparatus according to claim 1 , further comprising:

pressing members configured at both sides of the rotary blade to press the paper.

9. The paper processing apparatus according to claim 8 , wherein

the pressing members are rollers which are installed on a rotation shaft on which the rotary blade is installed, and are rotated by a motor together with the rotary blade.

10. The paper processing apparatus according to claim 8 , wherein

the pressing members are rollers which are installed on a rotation shaft on which the rotary blade is installed, and are driven to rotate through the conveyance of the paper.