| 摘要 |
PURPOSE:To eliminate such a bad condition that a detection position is different corresponding to the position where a blade jig is contacted, by arranging a filler with respect to a semispherical surface in a centripetally movable manner. CONSTITUTION:The end of a transmission shaft 24 operating a sensor switch 43 is formed into a semispherical surface 25 and five fillers are arranged so that four fillers are radially arranged at 90 deg.-intervals in a plane at right angles to the axis of the transmission shaft 24 operating the sensor switch 43 and one filler is arranged so as to be concentric to the axis of the transmission shaft 24 and the inner ends of sour fillers are formed into 90 deg.-conical surfaces 38a, 38b, 38c, 38d while the measuring surfac contacted with a blade jig or structure of each filler is set to a flat surface and each filer is centripetally slid to a measuring direction with respect to the leading end of the transmission shaft. By this constitution, the difference in measuring accuracy due to a measuring direction is prevented and, because the measuring surface of each filler is flat, in measuring the blade jig having a relatively small blade chip R, accurate measurement can be performed even if the contact position of the blade jig is slightly shifted. |
