A glue gun type gluing apparatus has glue guns 8a and 8b for applying glue to a gluing area in a joint flap 2 of a corrugated board sheet 1 for manufacturing a box, which runs on a box manufacturing line, a sheet end detection sensor 3 for detecting the front and rear ends of the corrugated board sheet 1, an encoder 7 for measuring the travel distance of the corrugated board sheet 1, and a control unit 9 for controlling the operation of the glue guns 8a and 8b. The control unit 9 learns and stores the position of gluing area on the basis of the information from the sheet end detection sensor 3 and the encoder 7 while the corrugated board sheet 1 is run at a low speed, and restricts the acquisition of detection signals by the sensor 3 during the time from the passing of the end point of the joint flap 2 to the arrival of the start point of the next joint flap 2.
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