| 摘要 |
A ladder equipped with a safety bar comprises a first support supported on the ground, including a plurality of horizontal bars. A fixed bracket has one end fixed to the upper portion. A second support is rotatably combined with the other end portion of the fixed bracket. A foothold is between the first and second supports and is rotatably combined toward the second support on one side. A safety is installed in a C-shaped fashion toward the front side from the fixed bracket. Rotating devices are installed in the first and second supports. Each of the rotating devices comprises a first circular rotating unit having a groove on the outer circumferential surface. A second circular rotating unit rotatably inserted into the groove. A hinge axis penetrates centers of the first rotating unit and the second rotating unit and axially combines the first and second rotating units.
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