Operating personnel in the operation of the lifting mechanical extrusion collision. In the hanging rigging crane machinery operation is very common in casualty, the danger of very, very serious consequences, often also can lead to the death of the personnel. In lifting machinery, there are the following situations: (a) the impact of the suspended load in the process of hoisting machinery. Because there is no need to take the necessary safety precautions. A hanging or falling pound sling workers and other personnel from above. This is a heavy machinery in the operation of the general casualty accident, the risk of great, very serious consequences, often resulting in casualties. (a) bundled off properly. One is due to the angle between the wire rope is too large, no balance beam; two is due to the lifting belt edges and corners of the suspended material without protection board. (b) sling defects. One is the hoisting mechanism of wire rope broken, causing the hanging down; two is the hook by defect. (c) overload. One is the workers on the hanging weight is not clear, hastily blind lifting; the second is due to the crooked pull oblique hanging overloading and snapping sling. (d) a winch. Is mainly due to the failure to install the lifting limit position limiter or limiter failure, can not be cut off in a timely manner until the winding up steel wire rope.
Electric shock casualties also occurred in the lifting machinery operation in the common casualty accident. Mainly have the following conditions: (a) the driver to touch the slippery touch line when the lifting machinery driver's room set on the same side of the slide, the driver in the upper and lower attention to touch the slippery line and electric shock. The main reason is: first, because of heavy mechanical and electrical facilities in a timely manner and leakage; the second is due to the driver's cab is not set security door insulation plate, causing the driver due to leakage and electric shock. (d) lifting rope touch touch line main reasons: one is the hoisting method is undeserved crooked cable-stayed suspended in violation of safety regulations; the second is due to heavy machinery near the contact line end to side not set sliding contact line and charged, leading to the operators of electric shock. In the operation of the whole crane tilting. Usually occurs in the open air operations in the mobile crane and tower crane. There are three main types: (a) has been blown down. Due to the failure of the crane rail clamp and the crane of the open pit operation, there is no wind proof anchoring device. (b) crawler crane tipping. Due to the lifting operation site does not meet the requirements and improper operation method, command operation errors and other reasons cause the body to turn. (c) automobile and tyre crane tipping. Because the lifting operation site does not meet the requirements, supporting legs set up sub requirements, improper operation, overload and other reasons.
Fall mainly occurred in the lifting machinery installation, maintenance operations. Including the following: (a) maintenance hanging cage falls into the main reasons: one is due to overhaul of the hanging cage design structure unreasonable (such as highly enough. Choose the material does not meet the requirements, etc.); the second is due to improper operation maintenance personnel; the third is due to maintenance personnel did not take necessary safety measures resulting in the maintenance cage and maintenance personnel fell together. (b) across the crane fell mainly due to: one is due to the maintenance personnel did not take the necessary security measures; the main reason: is due to a rope hanging rigging tower design structure is not reasonable; the second is due to improper disassembly method, the operating personnel and command with error, resulting in the tower together with the workers fell together.