| 摘要 |
<p>There is a pair of slide cams (1) provided symmetrically about the center line of a door (20) at the right-hand and left-hand end portions of the door, a pair of lock cams (2) provided on the main body (19) symmetrically in portions corresponding to those of the slide cams (1), and a hinge pin (14) mounted in a state in which it penetrates an axial hole provided at the lock cams (2). Each slide cam (1) has a first grooved cam (3) which can be engaged with and disengaged from the hinge pin (14) in the horizontal direction, and a second grooved cam (4) which can move from a first engagement position which continues from the first grooved cam (3) and is engaged with the hinge pin (14) guided by the first grooved cam when the door is closed to a second engagement position which serves as a pivot axis of the slide cam (1) when the door is opened. Each slide cam (1) is further provided with a first cam projection (5) provided around the second grooved cam (4). Each lock cam (2) is provided with a second cam projection (6) which locks the first cam projection (5) in the first engagement position. <IMAGE> <IMAGE> <IMAGE> <IMAGE></p> |
