Stair passage

The invention relates to the technical field of mechanical equipment, in particular to a stair passage. According to the ladder, the pedals which are sequentially hinged are adopted, the ladder for climbing can be formed by folding the pedals, meanwhile, the state of the current ladder can be locked through installation of the shaping part, and then the climbing safety is improved. Meanwhile, due to the fact that the pedals are hinged to one another, the length of the ladder can be changed in a traction or compression mode, the ladder can face different climbing heights, and the application range of the ladder is widened. 本发明涉及机械设备技术领域，具体是一种楼梯通道。本发明采用多块依次铰接的踏板，通过踏板的折叠进而能够形成用于攀爬的阶梯，同时定型部的安装，能够锁定当前阶梯的状态，进而提高攀爬的安全性。与此同时，由于各块踏板彼此铰接，因此可以通过牵拉或者是压缩的方式改变阶梯的长度，从而能够面对不同的攀爬高度，提高本发明的适用范围。