| 摘要 |
PURPOSE:To detect the accurate amount of glue even if a carton has a flap and if humidity varies by scanning a glue sticking part at a high frequency which attenuates owing to the presence of glue, and detecting the amount of sticking glue on the basis of the obtained signal. CONSTITUTION:Inspection signals corresponding to the attenuation of a high frequency in plural sections 35-38 almost perpendicular to the moving direction 6 of the carton are obtained and the amount of glue is detected on the basis of the difference in value at signal parts of the obtained inspection signals corresponding to the sections 35-38. Therefore, various methods are usable to detect the amount of glue on the basis of the difference. The set value for the judgment of a counter is small proportionally to the speed signal of the carton from a rotary encoder 62 when the speed is fast or large when slow, so that the sticking length of the glue is judged accurately even when the moving speed of the carton varies. |
