- Mar 20, 2009 -
Which accidents often happen to running cranes
The major accidents in running overhead travelling cranes driving are "turning over", "falling arm" and "folding arm".
In order to avoid the occurrence of "rollover accident, crane must be prohibited overloading and lifting, if the weight estimation is not clear, the first heavy lifting slightly off the ground, and then use the foot kick arm brace (reverse leg) whether the activities, such as lifting activities. In the lifting operation, lifting arm. After elongation is strictly prohibited to prevent loss of torque stability. In addition, the skew crane should be avoided, because the skew crane produces a horizontal force which is not conducive to stability and makes the crane lose stability.
The fall of the arm is mostly due to the poor maintenance of the equipment itself. For example, if the brake is closed, it depends on the spring, if it is not well maintained. Because of vibration or other reasons, the falling arm is not tight enough because of the excessive length of the rope, and the loosening of the amplitude will result in the falling arm accident. The accident was due to folding boom angle is too large. And the effect of the inertia force, the jib arm folding.
In order to avoid falling arm, serious personal casualty accidents caused by the folding arm, must comply with the "crane safety management regulations" provisions of the "boom of the crane boom and work within the area of the ban stand" provisions.