Patent ID: 7389594
Filing Date: 2008-06-24
Classification: G01B

Abstract:
1. A peripheral surface shape measuring apparatus of a roll-like object which measures a peripheral surface shape of the roll-like object such as a magnetic tape bulk roll, comprising: a pair of receiving portions on which both ends of a core of the roll-like object are placed; a receiving portion horizontally moving device which moves the pair of receiving portions in an axial direction of the roll-like object; a receiving portion vertically moving device which moves up and down the pair of receiving portions; a position sensor having a probe with a tip urged in a direction of abutting against a surface of the roll-like object to measure the peripheral surface shape of the roll-like object; and a sensor moving device which moves the position sensor in the axial direction of the roll-like object; and wherein an upper surface of each of the receiving portions has a concave cylindrical shape with a diameter larger than an outer diameter of the core of the roll-like object; and wherein the receiving portions have a semi-cylindrical shape.