Protoned B.v.

Harald Jerabek

Fastening element (5) secured against rotation for a structural part (4) to be removably attached to a supporting arrangement (1), which has a screw bolt (7) and a locking nut (10) to be tightened on the front side of the structural part (4). The screw bolt (7) is situated rotatably and longitudinally movably in an adaptor sleeve (6) which has a shaft part (6.1), which engages with little play in corresponding openings of the supporting arrangement (1) and of the structural part (4). The screw bolt (7) has at its inner end a hammer head (8), the cross-sectional shape of which is adjusted to that of the shaft part (6.1) of the adaptor sleeve (6) and which can be brought from an insertion position into a locking position swivelled through approximately 90.degree. to it. The structural part to be attached to the supporting arrangement (1) is forcibly held in position by means of penetration openings of equal area which are matched to the cross-sectional shape of the shaft part (6.1) of the adaptor sleeve (6).

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Mullheim, Germany

Harald Jerabek