| 摘要 |
PURPOSE: A frame reinforcement structure for a ladder is provided to prevent the breakage of joints of the steps and the frame of a ladder, thereby helping safe use of the ladder. CONSTITUTION: A frame reinforcement structure for a ladder is as follows. Reinforcing units are provided on a frame(100), to which both ends of steps(200) are coupled, in order to prevent the breakage of the joints of the steps and the frame caused by loads exerted on the steps. The reinforcing units are made of metal reinforcement plates(10) and fixed to the outer side of the frame close to the steps.
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