| 摘要 |
<p>PROBLEM TO BE SOLVED: To smoothly open and close a door by supporting one end of an arm on a first shaft against a wall side fixed bracket, providing between a fixed bracket and the arm an arm rotation range regulating link which rotates about the first shaft, and supporting the other end of the arm on a second shaft against a door side movable bracket. SOLUTION: When an arm 13 is rotated about a first shaft 12, a second shaft 15 is rotated in a circle about the shaft 12. Then when a center of the shaft 15 is displaced up to half the amount of displacement of the center of the shaft 15, the shaft 15 is displaced in the direction perpendicular to a wall 2 since the vertical distance from the center of the shaft 15 to the mounting surface of a fixed bracket 11 is made about equal to the core height of the shaft 12. Therefore when a door 3 is opened or closed, a movable bracket 16 and the door 3 are also displaced in the direction perpendicular to the wall 2 while a link mechanism 14 is being displaced between a maximum bent condition and a maximum open condition. Thus the thick door can be opened and closed without interfering with the wall, and deflection of a sealant can be prevented when the door is closed.</p> |
