Container inspection device and blister packaging machine

A container inspection device, comprising:

• an irradiator that irradiates, with predetermined light, a plurality of containers transferred in an arrangement of multiple lines;
• an imaging sensor that images the light radiated from the irradiator;
• optical path conversion sheets that convert an optical path of the light radiated from the irradiator and reflected from or transmitted through side wall areas that extend in a circumferential direction of side walls of each of the containers;
• an imaging optical system that forms an image of the light along the optical path converted by the optical path conversion sheets, onto the imaging sensor;
• and
• a hardware processor that identifies whether the side walls include a defect, based on image data obtained from the light imaged on the imaging sensor, wherein
• the optical path conversion sheets are laid across the multiple lines of the containers when viewed from an imaging sensor side, and disposed along a transfer direction of the containers,
• the optical path conversion sheets respectively correspond to the side wall areas, and each of the optical path conversion sheets converts the optical path of the light reflected from or transmitted through a corresponding one of the side wall areas into an optical path along an optical axis of the imaging optical system, and
• the side wall areas respectively corresponding to the optical path conversion sheets cover an entire circumference of the side walls.