| 摘要 |
A piston-ring inspecting device includes a sensor unit ( 27 ) including a light emitting system ( 27 a) that emits slit-like detection light toward an outer peripheral surface (Ps) of a piston (P) and an outer peripheral surface ( 2 c) of a piston ring ( 2 ) and a light receiving image system ( 27 b) that receives light reflected from the outer peripheral surfaces so as to form an image; an image calculating means that subjects image information obtained by the sensor unit to numerical processing and that calculates a tilt angle of the outer peripheral surface of the piston ring with respect to the outer peripheral surface of the piston; and a controller ( 30 ) including a judgment means that, based on arithmetical information obtained by the image calculating means and preset standard information, judges whether or not the piston ring has been fitted in a predetermined direction. Accordingly, an inspection can be performed without scanning, through a simple analysis process, in a short time, and with high accuracy.
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