| 摘要 |
PROBLEM TO BE SOLVED: To provide an visual examination device of cylindrical matter capable of detecting the dent, flaw and stain present on the side surface and edge face of the cylindrical matter in a short time to display them. SOLUTION: The visual examination device of the cylindrical matter has a moving means 13 for holding one end part of the cylindrical matter 11 to move it to an inspection position Q present at a standby position P, a truncated cone-shaped mirror 16 equipped with a reflecting surface 15 for surrounding the side surface 14 of the cylindrical matter 11 so that its center axis is allowed to coincide with the axis of the cylindrical matter 11 present at an inspection position Q, a perforated plane mirror 20 having an insertion hole 19 permitting the cylindrical matter 11 to pass formed thereto and arranged so as to be inclined with respect to the axis of the cylindrical matter 11 present at the inspection position Q, a first annular illumination means 23 having an opening 21 provided to its central part, arranged so as to be inclined with respect to the plane mirror 20 and irradiating the side surface 14 of the cylindrical matter 11 with vertical light through the truncated cone-shaped mirror 16 and the perforated flat mirror 20 and a side surface photographing means 26 for photographing the side surface image of the cylindrical matter 11 arranged on the back side of the first annular illumination means 23. COPYRIGHT: (C)2007,JPO&INPIT
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