Lower supporting pin layout determination apparatus and lower supporting pin layout determination method

A lower supporting pin layout determination apparatus which determines whether or not an lower supporting pin for receiving a downside of substrate is correctly arrayed in an electronic parts mounting apparatus that mounts electronic parts on a substrate hold by a substrate holding section,

• wherein the lower supporting pin has a shape including a base to be supported by a support plate placed in the substrate holding section, a shaft extending upward from the base, a smaller-diameter section that is on an upper portion of the shaft and in which an outer diameter of the shaft becomes smaller, and a contact surface that is formed on top of the smaller-diameter section and that contacts and receives a downside of the substrate;
• and
• the lower supporting pin layout determination apparatus has:
• an imaging unit that captures an image of the lower supporting pin from above, so as to acquire a planar image;
• a shaft shape detection section that subjects the image to recognition processing, so as to detect an outer shape of the shaft at a recognition reference position set at a height where a transition occurs from an outer periphery of the shaft to the smaller-diameter section;
• and
• a pin layout determination section that compares a planar position of the lower supporting pin determined from the detected outer shape with preset pin layout data, thereby determining whether or not the lower supporting pin is correctly arrayed.