To highly accurately measure a surface shape in a circumferential direction of a tread part, suppressing missing of data in a lateral wall area of a lag groove.SOLUTION: A tread shape measurement method includes: a measurement step; and a calculation step. The measurement step is configured to measure distance data Lx in an X-axis direction from first and second laser displacement meters 31 and 32 to surfaces of respective tread parts 101 as revolving a tire 100 around a Y-axis. The calculation step is configured to synthesize first distance data Lxwith second distance data Lxto obtain data representing a surface shape. The first and second laser displacement meters 31 and 32 are configured to direct an axial line of each laser light K in parallel with the X-axis, and are located, on a reference surface S orthogonal to the Y-axis, apart with equal distances La on either side of the X-axis and apart with an equal distance Lb in the X-axis direction from the Z-axis.SELECTED DRAWING: Figure 2

    【課題】 ラグ溝の側壁領域でのデータの欠落を抑えて、トレッド部の周方向の表面形状を精度良く測定する。【解決手段】 測定工程と計算工程とを含む。測定工程では、タイヤ100をY軸回りで回転させながら、第1、第2のレーザ変位計31、32からそれぞれトレッド部101の表面までのX軸方向の距離データLxを測定する。計算工程では、第1距離データLx1と第2距離データLx2とを合成して表面形状を表すデータを得る。第1、第2のレーザ変位計31、32は、各レーザ光Kの軸線をX軸と平行に向け、Y軸と直角な基準面S上に、X軸の両側に等距離La隔ててかつZ軸からX軸方向に距離Lbを隔てて位置する。【選択図】図2


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    Title :

    TREAD SHAPE MEASUREMENT METHOD, AND TREAD SHAPE MEASUREMENT DEVICE


    Additional title:

    トレッド形状測定方法及びトレッド形状測定装置


    Contributors:

    Publication date :

    2019-07-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / B60C VEHICLE TYRES , Fahrzeugreifen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen



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