| 摘要 |
The invention concerns a telescopic stepladder with which it is possible to carry out all types of building work at different levels, including the flight rise of a spiral staircase, in complete safety. It consists of 4 sliding and independent legs which are milled to 7 mm 0. The lengths are variable, according to stepladders of 4, 5, 6 steps etc. The rods have a width of 60 mm and a thickness of 25 mm and provide a satisfactory strength. The two ends are rounded in order to facilitate positioning. The sliding rods are fixed on the stepladder by means of bolts, after drilling 8 holes of 6 mm diameter along the necessary length. A wing screw provides the blocking. <IMAGE>
|
