| 摘要 |
<p>The structure (1) comprises at least a first and a second element (2, 3) connected together in correspondence with respective flat walls (4, 5) by a connection unit (6) consisting essentially of a screw (15) and a pair of plates (16,17) each of which comprises a bore (21a, 21b) in a central position and at least two parallel projections (24a, 25a, 24b, 25b) defining opposing bearing surfaces (28a, 29a, 28b, 29b). One plate (16) is mounted between the head (18) of the screw (15) and the flat wall (4) of the first structural element (2), and the other plate (17) rests on the flat wall (5) of the second structural element (3) and cooperates with the end of the shank (19) of the screw (15) in such a manner as to lock said walls (4, 5) tightly together. The plates (16, 17) are positioned such that the respective opposing projections (25a, 24b) define two parallel planes (33, 34).</p> |
