| 摘要 |
The present invention relates to an apparatus for measuring inside and outside diameters, comprising a hollow support frame (100) which is formed lengthways in the longitudinal direction; a standard bar (110) which is installed to pass through vertically at one side of the support frame (100) and supports a measurement ruler (120) to be in close contact with the inside diameter or the outside diameter of a workpiece (D) in measurement; a measurement bar (170) which is installed to pass through vertically at the other side of the support frame and supports and moves a measurement ruler (180) to be in close contact with the inside diameter or the outside diameter of the workpiece (D) in measurement; and a measurement instrument (270) which is connected to the measurement bar (170) and indicates a measured value of the inside diameter or the outside diameter of the workpiece (D) by moving a measurement rod (274) according to right and left movement of the measurement bar (170). |
