Construction is with tight step by step

The utility model discloses a construction is with tight step by step, including main kelly, raker and movable clamping rod, raker fixed mounting is at the top of main kelly to be the vertical fixation welding with main kelly, the top of raker is provided with the seben, be provided with the installation cavity on the main kelly to it is provided with logical groove to correspond the installationcavity, install the air leg through the tray in the installation cavity, movable clamping rod's tip is provided with the loop bar to through the fixed suit of loop bar and main kelly, it is provided with the locating hole to correspond logical groove on the loop bar, movable clamping rod is through loop bar and raker and corresponds the setting, movable clamping rod's the terminal raker that corresponds inclines to be provided with the steel sheet to be provided with the cardboard through the steel sheet. This construction is with tight step by step, convenient operation, stability is strong,effectively improves work