| 摘要 |
PROBLEM TO BE SOLVED: To provide a double doors closer having a simple structure. SOLUTION: This double doors closer has a stationary shaft 10 and a cylindrical housing 20 fixed on the doors. The housing 20 incorporates a piston 80 being unable to rotate, an inner side communicating passage 83 with a check valve 84 for communicating a high pressure oil chamber 81 with a low pressure oil chamber 82 on both sides of the piston 80, outer side communicating passages 102, 104 for letting oil in the high pressure oil chamber 81 pass into a low pressure oil chamber 82 side when the piston 80 is displaced from the low pressure oil chamber 82 side to a high pressure oil chamber 81 side, a high pressure side cam member 91, and a low pressure side cam member 96. When the housing 20 is rotated by the doors to be opened, the high pressure side cam member 91 pushes out the piston 80 from the high pressure oil chamber 81 side to the low pressure oil chamber 82 side. When the doors are rotated in the direction of closing, the low pressure side cam member 96 pushes out the piston 80 from the low pressure oil chamber 82 side to the high pressure oil chamber 81 side. COPYRIGHT: (C)2009,JPO&INPIT |
