TEMPORARILY SET STAIRCASE

PROBLEM TO BE SOLVED: To horizontally hold a tread regardless of a set angle, and facilitate disassembling and assembling by pivoting and connecting a link through a pivot part on upper and lower leg columns to hold a parallel state and constituting a temporarily set staircase. SOLUTION: A staircase body A is constituted so that a pivot part is provided on upper and lower leg columns 1 comprising steel-made pipe material to pivot and connect a link and right and left leg columns are connected with a connection rod at upper, middle and lower three points. A tread B is constituted so that a gauze is stretched on a frame body, a locking groove provided on the frame body is fitted to the pivot part of the leg column 1, and the non- slip member 8 of a thumbscrew and the like is inserted in the frame body of the link and the tread B to be fixed. A foot part 10 is rotatably attached to the lower end of the staircase body A, and a leg column joint is inserted in the leg column 1 to vertically connect the staircase body A. In addition, a fitting for handrail attaching 13 is attached to the leg column 1. Thus, the tread B is horizontally held regardless of the set angle of the staircase body A, and disassembling and assembling are easy.