Method of operating fastening apparatus and fastening apparatus

A fastening apparatus comprising:

• a plurality of fastening tools;
• a first movement mechanism configured to rotate the plurality of fastening tools in a circumferential direction;
• a second movement mechanism configured to rectilinearly move the plurality of fastening tools in a radial direction;
• and
• a third movement mechanism configured to rectilinearly move the plurality of fastening tools in a vertical direction,
• wherein the first movement mechanism comprises a closed-curve guide unit having a closed-curve shape and configured to define a route along which the plurality of fastening tools rotates in the circumferential direction,
• wherein a gear portion is provided on a radial outer surface of the closed-curve guide unit, and wherein the first movement mechanism comprises a plurality of pinion gears provided to face the radial outer surface of the closed-curve guide unit.