Adjustable box nailing machine

The utility model relates to the technical field of nailing machines, in particular to an adjustable nailing machine which comprises an upper cross beam and a lower cross beam, a nailing mechanism is arranged at the front end of the upper cross beam, and a limiting mechanism is arranged between the nailing mechanism and the lower cross beam. The limiting mechanism comprises a fixing frame fixed to the nailing mechanism, a fixing plate fixed to the bottom of the fixing frame, a movable plate, an outer guide wheel rotating in the movable plate and a limiting plate, and an adjusting mechanism is arranged between the lower cross beam and the limiting plate. According to the scheme, the limiting mechanism can position the inner side of a carton, meanwhile, the outer end of one side where nails are nailed is limited through the outer guide wheel, it is guaranteed that the joints of the carton are tightly attached, and therefore the carton nailing quality and effect are guaranteed, the outer guide wheel can be adjus