| 摘要 |
<p>The inspection access frame involves a panel, cemented with tiles, inside a projecting edge, held detachably on a bearing edge. There is a frame (1) with the panel (2) resiliently set on its inner bearing edge (12). The frame has fishplates (6) on a swivelling mounting on it, as abutments for the tiles (3) which are resiliently pressed outwards with the panel. Springs (4) may be held on the bearing edge, pref. on two opposite sides with shanks arched upwards. There may be threaded sockets at the frame corners, with fishplates attached to them by screws, so as to be able to swivel. The frame may be contractable in at least one direction. The inspection frame structure is simplified, with automatic adaptation of bearing height to the tile thickness.</p> |
