| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the structure, eliminate protrusions while closing a door, increase safety and appearance, and reduce the production cost, by providing a structure changing over the rotary center position in accordance with the opening of the door body. SOLUTION: The first cam 36 of the first hinge member 30 pushes a restrictive member 60 in the motion range until nearly 90 degrees of the opening of the door body 15 and the restrictive member 60 transfers to the second position and fits to the second hinge member 40 to restrict the rotation of the second hinge member 40 and further, the door body 15 rotates around the first pivot shaft 51 together with the second hinge member 40. On the other hand, when the door body 15 reaches the opening range exceeding nearly 90 degrees, the second cam 46 of the second hinge member 40 pushes the restrictive member 60 and the restrictive member 60 transfers to the first position and separates from the second hinge member 40 and fits to the first hinge member 30 to restrict the rotation of the first hinge member 30. As a result, the door body 15 rotates around the second pivot shaft 52. In this way, projections are eliminated while the door is closed and hence, the structure becomes simple.</p> |
