| 摘要 |
PURPOSE:To prevent the generation of a collision accident by obtaining the minimum inter-cage distance changed according to the travel speed of cages, and performing forced sudden decelerating operation to a following cage so as to prevent the following cage from approaching the minimum inter-cage distance. CONSTITUTION:Cage speed detecting parts 22A-22X are formed of pulse generators fitted to the roller guide or the like of a cage. Cage position-speed signals 23A-23X are generated from pulse signals at the time of rotating in association with the travel of the cages, and the cage position-speed signals 23A-23X cage by cage are inputted from the cage speed detecting parts 22A-22X into a group control device 24 performing a collision preventing function. The inter-cage relative speed and cage speed are computed by constantly detecting the inter-cage distance, and on the basis of this data, the minimum allowed inter-cage distance is computed to perform forced deceleration protective action on the basis of the minimum inter-cage distance reference value corresponding to the travel speed of the cages. |
