Eight trail plans of expansion and assembly and folding unrestricted multiple step combined uses

摘要

(57) Abstract (Modified) Topic Eight trail plans of multiple steps, when using and, spreading/displaying after the usingOpen and the assembly and to make folding unrestricted, the expansion assemblyMake folding unrestricted conveyance easy. Solutions Small trail 13 vis-a-vis mid leg 10 folding unrestrictedWith to do, furthermore husband Various plan board 15,171 after & in & before the differenceOn husband Various underside left and right of 9, high level horizontal bar 3 sublevel horizontal bar 11 it is lowStep horizontal bar 14 the husband Various Inlaying deviation from after making possible, strut bar 1 in strut bar 16Through the hinge 9 which, adheres the strut bar 20 of 7 ago it makes, two time unrestrictedIt is stature board on the both ends of 7 and lower background 7a, the base foot and large trail 2 and high levelThe Merciful Goddess opening to install the horizontal bar unrestrictedly, the base foot the small trail, the bottom step waterThe flat bar front base foot vis-a-vis 21 mid leg front step horizontal bar, the outside one Merciful GoddessFolding to install unrestrictedly in opening, on the rear of the stature board 5The Inlaying deviation from it made unrestricted.