| 摘要 |
<p>A device for the simultaneous positioning adjacent to each other at cavity distance of two relatively large elements of hardened material, such as sand-lime brick, is provided. This device comprises a top frame which can be connected to a hoisting mechanism and two gripping units. These gripping units are fixed together via adjustable beams only, said adjustable beams are adjustably interconnected. The gripping units are also connected with the top frame and can each grip an element, and each comprising two brackets which pivot about said beam. One end of the brackets engages an opening in the element, while the other end is connected in such a way via an auxiliary girder to the top frame that during the application of a hoisting force on the top of frame the brackets pivot relative to each other with their one ends inwardly essentially at right angles to the direction of hoisting. So those ends of the brackets are tightly clamped in the openings of the elements, while the gripping units are adjustable relative to each other essentially at right angles to the direction of hoisting.</p> |
