Due to the moving parts such as coupling and transmission chain are not equipped with protective cover, they will be damaged by rotating parts when personnel approach. 2. 2. The scraper chain of the screw hoist is stuck by the uneven chute interface or wood block, so that the lower chain is stuck, and the upper chain is grooved at the nose and tail. When the tension is suddenly large, it will cause the nose or tail to pick up, hurt or crush the adjacent workers. 3. When the long data is transported through the conveyor belt, people are squeezed between the long data and the support and injured due to improper operation. 4. The worker illegally rides on the conveyor or walks in the slot of the machine, and is damaged by the scraper chain that jumps up suddenly. 5. The operator did not stop when dealing with the problem. Maybe even though they are now parking, they did not hang up the warning sign of "someone is working, not driving". As a result, they were injured due to accidental driving. The above is Jingjiang Weineng machinery to clean up the problems of the screw hoist and the use of the relevant content, I hope you can help, interested friends can save attention!