Abstract: Inspection equipment for a screw part of a bottle-can having a mouth section provided with a curl portion in which an opening edge thereof is rolled up outward and the screw part for fitting a cap by threads below the curl portion for attaching the cap with a liner, the inspection equipment inspects a shape of the screw part of the mouth section by imaging an imaging area which is set so as to include a part of the mouth section while rotating the bottle-can around a can-axis, the inspection equipment including: a rotating device which holds and rotates the bottle-can around the can-axis; a thread-illumination device which irradiates illumination light toward the screw part of the bottle-can; an imaging device which continuously obtains inspection images including reflected light of the illumination light at the imaging area; and an thread-inspection device which inspects the screw part.

Abstract: An inspection method and inspection equipment for mouth section of bottle-can including: first-inspection process for eliminating the bottle-can in which existence of a low-brightness area is detected from a monochrome inspection-image which is obtained by imaging the curl portion with irradiating white light to the curl portion in an imaging area of the bottle-can which is conveyed along a main-conveyance path; and a second-inspection process for judging quality of the bottle-can while conveying the bottle-can which is eliminated by the first-inspection process along a secondary-conveyance path, by irradiating illumination lights having two colors from different directions to the curl portion in the imaging area along substantially a tangential direction of a cylindrical surface of the mouth section so as to image a color inspection-image, and distinguishing existence or not of the asperity on the curl portion from signal strengths of the light colors of the color inspection-image.

Abstract: Inspection equipment for mouth section of bottle-can, including: a rotating device which holds and rotates the bottle-can around a can-axis; a first illumination device which irradiates a first illumination light toward the curl portion in an imaging area; a second illumination device which irradiates a second illumination light having a different light color from that of the first illumination light toward the curl portion from an opposite side to the first illumination light with the imaging area therebetween; a third illumination device which irradiates a third illumination light having a different light color along an intersecting direction with the first and second illumination lights; an imaging device which is disposed toward the imaging area and obtains an inspection image including reflected lights at the curl portion; and an asperity-recognition device which detects an edge position of the curl portion based on the reflected light of the third illumination light.

Abstract: Inspection equipment for a screw part of a bottle-can having a mouth section provided with a curl portion in which an opening edge thereof is rolled up outward and the screw part for fitting a cap by threads below the curl portion for attaching the cap with a liner, the inspection equipment inspects a shape of the screw part of the mouth section by imaging an imaging area which is set so as to include a part of the mouth section while rotating the bottle-can around a can-axis, the inspection equipment including: a rotating device which holds and rotates the bottle-can around the can-axis; a thread-illumination device which irradiates illumination light toward the screw part of the bottle-can an imaging device which continuously obtains inspection images including reflected light of the illumination light at the imaging area; and an thread-inspection device which inspects the screw part.

Abstract: An inspection method and inspection equipment for mouth section of bottle-can including: first-inspection process for eliminating the bottle-can in which existence of a low-brightness area is detected from a monochrome inspection-image which is obtained by imaging the curl portion with irradiating white light to the curl portion in an imaging area of the bottle-can which is conveyed along a main-conveyance path; and a second-inspection process for judging quality of the bottle-can while conveying the bottle-can which is eliminated by the first-inspection process along a secondary-conveyance path by irradiating illumination lights having two colors from different directions to the curl portion in the imaging area along substantially a tangential direction of a cylindrical surface of the mouth section so as to image a color inspection-image, and distinguishing existence or not of the asperity on the curl portion from signal strengths of the light colors of the color inspection-image.

Abstract: Inspection equipment for mouth section of bottle-can, including: a rotating device which holds and rotates the bottle-can around a can-axis; a first illumination device which irradiates a first illumination light toward the curl portion in an imaging area; a second illumination device which irradiates a second illumination light having a different light color from that of the first illumination light toward the curl portion from an opposite side to the first illumination light with the imaging area therebetween; a third illumination device which irradiates a third illumination light having a different light color along an intersecting direction with the first and second illumination lights; an imaging device which is disposed toward the imaging area and obtains an inspection image including reflected lights at the curl portion; and an asperity-recognition device which detects an edge position of the curl portion based on the reflected light of the third illumination light.