Air damper hinges and automatic door closing mechanism

摘要

PROBLEM TO BE SOLVED: To provide an air damper hinge capable of preventing the occurrence of failure, having superior durability, and being satisfactorily usable outdoors.;SOLUTION: This air damper hinge includes a cylinder 3 having an air flow groove 31 formed along the longitudinal direction, an operation rod 4 arranged in the cylinder 3, a cam groove 42 having an inclined part 422 formed at the outer periphery of the operation rod 4, a substantially bottomed cylindrical piston 5 arranged and stored in the cylinder 3, a spherical body 52 provided by protruding on an inner side from the piston 5 and engaging with the cam groove 42, an air control part 8 provided in the cylinder 3, and an inner cylinder 34 separating an air accumulation part S from the air flow groove 31. The piston 5 moves by corresponding to travel of the spherical body 52 for the inclined part 422. The air in the cylinder 3 is introduced into the air accumulation part S through the air flow groove 31 by a suction valve 81 in accordance with travel of the piston 5 for opening operation, and the air in the air accumulation part S is discharged into the cylinder 3 through the air flow groove 31 by a discharge valve 82 while suppressing air quantity in the air accumulation part S in accordance with travel of the piston 5 for closing operation.;COPYRIGHT: (C)2011,JPO&INPIT