Figure 144.-Scraper, having stepped into machine frame while machine is running, gets his foot caught in the running gear. Figure 145.-Scraper stands outside framework of running machine while oiling and goes around frame of machine rather than step over it. Scraper does not get hurt. Scraper: Don't step over frame of mining machine while it is running. Figure 146.-Machine runner moves machine through chute into entry; scraper rides on machine. Open sprocket wheels and chain are not guarded; bits in cutting chain are not removed, and runner uses loose board as seat. Figure 148.-Runner has his scraper walk ahead of machine to see if roadway is clear. Sprocket wheels and chain are guarded; bits in cutting chain are removed; special brake is used; and a seat for the runner. Figure 149.-Scraper, having walked in advance, signals that trip is approaching on entry and runner holds machine until trip passes. No accident happens. Machine man: Don't let your helper ride on machine. He should walk ahead of machine to see if roadway is clear. |