What is fire-resistant hinge

The fire resistant hinge is mainly provided with a plurality of elliptical holes on the hinge sheet, a toothed strip saw tooth is formed below the middle section of the hinge sheet, and another hinge sheet is arranged below the hinge sheet. A plurality of screw holes on fire resistant hinges are formed at the corresponding elliptical hole of the hinge sheet, and a toothed strip saw tooth is also formed on the middle section, and the sawtooth between the two hinge sheets is used to mesh with each other, The screw is penetrated in the oval hole and the screw hole to combine the two hinge plates, so as to prevent the hinge plate from sliding due to the vibration of the fire door when opening and closing, so as to make the fire door easy to open and close. At the same time, the utility model can also adjust the relative position of the two hinge plates, so as to adjust the spacing between the fire door and the door frame.