Overhead conveyer system for use with overhead conveyer vehicle, has safe control components to define the movement speeds, and insecure encoder system to adjust the movement speeds

摘要

The overhead conveyer system has the safe control components to define the movement speeds, and an insecure encoder system to adjust the movement speeds. The safe signal generators are arranged to provide a safe signal for entrance of an overhead conveyer vehicle into a secure area. The predetermined maximum speed is set within the safe range at the secure area. A safe and unsafe sensor system is arranged to detect the safe range.