JPS6434818A - Collision preventing device - Google Patents

Abstract

PURPOSE:To surely prevent collision in the title device such as a stacker, by inputting current position data indirectly through a memory part for each moving machine and keeping the memory of previous data at the time of operation stoppage or power failure. CONSTITUTION:The current value of a position data D1 of a moving machine 3 is inputted into a current value inputting part 12 for each moving machine 3, and inputted to a current value memorizing part 14 through a gate part 13 to renew data to be memorized. The data is processed at a processing part 2, where a command signal D2 for prevention of collision is outputted to each moving machine 3. In this case, if an operation signal D3 is inputted to the gate part 13 from each moving machine 3, the current value data is transmitted to the memory part 14. If a operation signal D3 is not inputted, the position data is not transmitted. The memorized data is thus maintained in the previous condition. In this constitution, collision can be surely prevented after power failure or the like.