Roll paper steering devive, printing apparatus and method for assembling printing roll paper steering device

A roll paper steering device comprising:

• a guide rail fixed to a main body frame;
• a guide engaged with the guide rail so as to be movable along the guide rail;
• a holding shaft fixing member supported by the guide rail via the guide;
• a roll paper holding unit including a roll shaft and mounted to the holding shaft fixing member;
• a movable member configured to hold a motor and an external thread portion that rotates by the motor and adjustably mounted to the holding shaft fixing member;
• a nut member including an internal thread portion that receives the external thread portion, the nut member being fixed to the main body frame in a posture so that an axis of the external thread portion is parallel with the guide rail;
• a first adjustment unit that causes the holding shaft fixing member to swing to an inclination where a tip of the roll shaft is positioned upward, to thereby adjust a posture of the holding shaft fixing member with respect to the main body frame;
• and
• a second adjustment unit configured to adjust a position at which the movable member is mounted to the holding shaft fixing member.