| 摘要 |
PURPOSE: A door hinge is provided to improve productivity by heightening the assemblage efficiency, to open and close a heavy door simply by distributing the load of a heavy door evenly and to promote the convenience on use by controlling the tensile force of a spring. CONSTITUTION: The door hinge comprises the steps of forming converse spiral units(111a) on both inner ends of a movable hinge body(110) and installing sliders(130a,130b) to move forward and backward, forming guide grooves(132) on the other ends of the sliders(130a,130b) to make the sliders(130a,130b) take tensile force toward the movable hinge body(110) by a spring(140), installing a guide projection(124) on the inside of fixed hinge bodies(120a,120b) which are fixed with the spring(140) and the sliders(130a,130b) to guide sliders(130a,130b) make a rectilinear motion by fixing to the guide groove(132) of both sliders(130a,130b), and screwing a spring tension control cap(125) on the inner end of the fixed hinge bodies(120a,120b).
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