| 摘要 |
PROBLEM TO BE SOLVED: To reduce a required survey time for an elevator guide, by obtaining and recording a precise and relative shift of a measurement roller at each incremental stage of a rail by a rail survey constitution part. SOLUTION: A first and a second lateral sensor rollers 160, 162 are movably mounted at a housing 158 of a survey constitution part 130. Each roller comes in touch with a rail surface 155, 157 and is pulled in touch with a guide rail 132 by an elastic means. A means for measuring a partial shift of the rail 132 correctly and precisely is provided at each position of the sensor rollers 160, 162. The rail 132 is kept in touch with the related positioned sensor roller. The survey constitution part 130 has a contact point between fixed rollers 161, 163 and 150, 152 set at a first and a second supporting assembly 134, 136. The contact points are spaced in a longitudinal direction by an integral multiple of a predetermined step length. A combination is similarly set to be an integral multiple of the step length from positioned sensor rollers 160, 162.
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