Importance

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Abstract

This invention relates to a container wall thickness inspection device 1 for inspecting a container 10A in which regions with a relatively greater wall thickness (flat portion Rf) and regions with a relatively smaller wall thickness (corner portion Rc) are distributed in the circumferential direction, the container wall thickness inspection device 1 comprising: a wall thickness measurement device (electrostatic capacity detector 4) with a sensor unit 5 for measuring a wall thickness of a site facing the sensor unit 5 on the outer peripheral surface of the container 10A; a rotary drive mechanism for axially rotating the container 10A around the central axis of the container in order to measure a wall thickness of the container over the entire circumference by the wall thickness measurement device; a region detection device (photoelectric sensor 8) for detecting which region of the container 10A corresponds to the site being measured for its wall thickness by the wall thickness measurement device; and a determination device for making a pass/fail determination with respect to the wall thickness of the container 10A based on measured wall thickness values over the entire circumference of the container 10a, which are obtained from outputs of the wall thickness measurement device. The determination device comprises a storage unit for storing a pass/fail determination standard value with respect to the wall thickness for each region, and a comparison unit for comparing each measured wall thickness value obtained from the outputs of the wall thickness measurement device with a pass/fail determination standard value stored in the storage unit corresponding to the region detected by the region detection device.

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First Claim