Convenient installation device of tunnel internal door shape steel bracket

The utility mode relates to a convenient installation device of tunnel internal door shape steel bracket has solved current door shape steel bracket installation and has had inefficiency and the easy problem that causes the injury to equipment and workman. Including lifting cross beam, the left and right sides of lifting cross beam up end all is provided with U type splint, the notch of two U type splint is relative, and all twist the outer end of two U type splint has the splint fixing bolt on lifting cross beam, a plurality of regulation screw holes that correspond with U type splint groove opening position are all opened to lifting cross beam's the left and right sides, the notch department of two U type splint all is provided with and adjusts the splint adjusting bolt that the screw hole is connected, lifting cross beam left and right sides antetheca all is fixed with lifter arm threaded rod and the lifter arm baffle that is located its below, it has lifter arm lock nut all to twist on the lifter arm thre