| 摘要 |
An apparatus and a method are provided for rapidly and precisely measuring an outer diameter of a pipe end portion of various sizes of pipes. This apparatus includes a main arm (1), a lower gauge head support arm (2), a bearing roller arm (3), an upper gauge head supporting arm (4), a presser roller arm (5), an position-fixing bracket (6), a gage head (14b) which is horizontally and vertically movable while being supported by the arm (2), and a gauge head (15b) which is also horizontally and vertically movable while being supported by the arm (4). In addition, A gauge heads (14a) and (15a) are provided, both of which are vertically movable.An object is measured in its outer diameter by the gauge heads while being rotatably held by rollers (10a, 10b, 11a and 11b) of the arm (3) and (5). Such a measurement can simultaneously be carried out at two longitudinal portions of the measured object.
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