| 摘要 |
PURPOSE: A link device for opening and closing a door is provided to be applied to an existing structure by differently setting dimension and opening angles. CONSTITUTION: A link device for opening and closing a door comprises a cylinder(1), a crossbar(2), a link mount(3), a link(5), a lever(6) and a clevis member(4). The crossbar is coupled to the rod end of the cylinder(8) and moves back and forth to a door(15). The link mount is fixed to both sides of a main frame structure(14). The bent portion of the link is rotatably connected to the link mount. The lever rotatably connects the front end of the link to the door. If the front end of the link rotates toward inner side of the main frame structure, the lever makes the door have a closed state. If the front end of the link rotates toward outer side of the main frame structure, the lever makes the door have an open state.
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