GRAVITY HINGE TYPE DOOR HINGE

摘要

PROBLEM TO BE SOLVED: To calmly open and close a door without generating a collision sound by a collision against the door supporting side even when the door is rotated, opened or closed strongly in a gravity hinge type door hinge. SOLUTION: The projecting end 60c of a guide shaft 60 is fitted to a first hinge metal fitting 11 for a guide hinge H2 fixed on the door supporting side irrotationally while the guide shaft is inserted into a shaft cylinder case 50 for a second hinge metal fitting 12 fixed on the door side and a one-way clutch 53 is inserted by rotatably inserting around the guide shaft. A rotary system damper 57 integrally rotated with the shaft cylinder case is installed between the one-way clutch and the shaft cylinder case. The rotary system damper is formed in a constitution having a braking section 57a generating braking torque on the basis of viscous resistance or frictional resistance between the braking section and the outer periphery of the one-way clutch when the one-way clutch works and the fixed state (a rotary control in one direction) in which the damper is engaged with the guide shaft is brought when the door is turned in one direction. COPYRIGHT: (C)2003,JPO