| 摘要 |
<p>PURPOSE:To improve the accuracy of stopping position by correcting the setting distance at the start of braking in accordance to error between average and target levels of detected levels corresponding with the stopping position of moving body to be operated for every predetermined times upon braking/stopping of moving body. CONSTITUTION:Boards 7 to be detected are provided on a plurality of trays 4 fixed with equi-interval on an endless chain 1, while a pair of photo-optical switches PHS-F, R are provided with such interval as to detect the opposite ends of said board 7 simultaneously while furthermore, a photo-optical switch PHS-X for detecting the original point is provided. Upon matching of the count of transmitted pulses with such level as corresponding to the setting distance after detection of the front end of said board 7, a brake command is produced to stop the tray 4. Here, the average level of said counts corresponding with the stopping position of tray 4 is obtained for every setting time of stoppage thus to correct the setting distance in accordance to the error between said average and target levels thereafter the corrected setting distance is utilized to perform stop control.</p> |
