Printing paper winding device

A printing paper winding device comprising:

• a winding shaft for winding on a band-like printing paper received from a printer along a path of the printing paper;
• a drive unit for rotationally driving the winding shaft;
• a tension roller that contacts the printing paper upstream of the winding shaft and is operable to apply tension to the printing paper by reciprocation of the tension roller through a prescribed tension region, following the winding of the printing paper;
• a tension arm for holding the tension roller;
• a control unit for controlling movement of the tension roller;
• a roller rotary shaft that rotatably supports the tension arm so that the roller arm is operable to move the tension roller reciprocally in the forward and backward direction generally along the winding path;
• wherein movement of the tension roller in one direction decreases the bend angle of the printing paper at the tension region and movement in an opposite second direction increases the bend angle;
• a first fixed guide roller positioned upstream of the tension roller in the path of the printing paper and operable for guiding and introducing the printing paver from the printer into the printing paper winding device, and
• a second fixed guide roller after the first guide roller in the path of the printing paper for guiding the printing paper from the tension roller onto the winding shaft, and
• the control unit is operable such that
• the bending angle of the winding path of the printing paper formed by the printer, the first fixed guide roller, and the tension roller is made closer to a more obtuse angle than to a more acute angle,
• the bending angle of the winding path of the printing paper formed by the first fixed guide roller, the tension roller, and the second fixed guide roller is made closer to a more obtuse angle than to a more acute angle, and
• the bending angle of the winding path of the printing paper formed by the tension roller, the second fixed guide roller, and the winding shaft is made closer to a more obtuse angle than to an acute angle.