| 摘要 |
<p>The joint comprises a first set of joining elements (10, 50, 15, 17, 52) obtained on a flat part of a first casing of sheet metal (2), and a second set of joining elements (11-14, 16, 18, 21) obtained on a flat part (8) of a second casing of sheet metal (1); the first set of joining elements (10, 50, 15, 17, 52) comprises at least one notch, defining at least one opening (50, 52) in said flat part of the first casing of sheet metal (2) and a tang (10); the second set of joining elements (11-14, 16, 18, 21) comprises at least one group of bridges (11-13), protruding to a different extent one from the other from said flat part (8) of the second casing of sheet metal (1), that can be inserted in said at least one opening (50, 52) and that can be displaced in a direction parallel to said flat part of the first casing of sheet metal (2) to surround said tang (10) and to engage one edge of said at least one opening (50, 52), so as to oppose a displacement of the two casings of sheet metal (1, 2) in the orthogonal direction and to a further displacement of the same in the direction and in the sense of coupling of the two casings of sheet metal (1, 2). Preferably there are also further joining elements (14-18) suitable for preventing relative displacements of the two casings of sheet metal (1, 2), as well as their involuntary uncoupling. <IMAGE></p> |
