Method and system for the determination of the quality of a bonded area in a boxmaking blank

摘要

This invention relates to a method and system for the determination of a quality of a bonded area in a boxmaking blank, which are suited for use with a boxmaking apparatus adapted to continuously assemble boxes from such boxmaking blanks (1). Owing to an ingenious elaboration made on the manner of formation of an image of the boded area (1C), the method and system permit an easy determination as to whether the bonded area (1C) is good or bad. First, a light source (10) and image pick-up means (11) are adjusted in position so that they are set in directions corresponding to a position of the bonded area (1C) of the blank (1) travelling on and along a production line and a direction of formation of an image by the image pick-up means (11) extends at an angle relative to a direction of an optical axis of sheetlike light from the light source (10). The sheetlike light is then irradiated from the light source (10) toward the bonded area (1C) so that the sheetlike light extends across a gap (1D) formed in the bonded area (1C), whereby an image of the bonded area (1C) is formed. Based on information of the image, a width of the gap (1D) is computed to conduct a determination as to whether the gap (1D) is good or bad.