| 摘要 |
PURPOSE: A hinge for an auto-closing door is provided to economize the time required for installation. CONSTITUTION: The hinge for an auto-closing door comprises a housing(1) provided with a hydraulic control body(3) and a hinge shaft, a cap-shaped coupler(5) fitted to the upper part of the housing(1), a door attachment plate coupled with the housing(1), a doorframe attachment plate(7) screwed on the coupler(5) and fixed to a doorframe, a hinge shaft installed to the housing(1), fitted to the coupler(5) and fixed to the doorframe to reciprocate a piston, a piston reciprocated along the hinge shaft(3) and reciprocated in a cylinder room filled up with a fluid, a control valve(4) installed to the hydraulic control body(3) to control a fluid circulated through a passage and an oil groove, a serration unit(51) projected upward from the housing(1) and formed around the coupler(5) assembled to the hinge shaft, a high tensile block(100) and a fixing bolt(B) coupled to the coupler(5) having the serration unit(51).
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