| 摘要 |
<p>A lifting device in the bottom of the fixed frame raises the movable frame in an inclined plane between the bottom closed position, the central position for tilting, and the upper one for hinging, being actuated by the rod. Top and bottom hinge sections are mounted near the corners of the movable frame, the former engaging in a bearing in the fixed frame for hinging, while the rod thrusts a further bearing upwards into engagement with the latter. A stop hinges on the side of the fixed frame on an axis parallel to the tilt axis, and has a slot for a slide used when tilting. An opening in the side of the slot allows freeing of the slide when hinging. A locking device on the fixed frame is engaged by a component protruding from the movable frame in the closed position.</p> |
