| 摘要 |
To allow inclination of a sealing surface of a bottle mouth portion to be correctly inspected even when the bottle wobbles or is inclined due to rotation of the bottle while the bottle is being rotated on an inspection table. Two points G and H on the sealing surface of a bottle mouth are detected in a mouth portion image taken by a mouth portion image taking means, two points M and N at a bottom end of the bottle are detected in a base portion image taken by a base portion image taking means at the same time as the mouth portion image is taken, and sealing surface inclination of the bottle in a vertically standing position is calculated by subtracting inclination of the two points M and N of the base portion from inclination of the two points G and H of the mouth portion. This allows inclination of the sealing surface of the bottle mouth portion to be correctly inspected even when the bottle wobbles or is inclined.
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