(57) The device (1) comprises a support structure (2) with an opening (3) for the insertion
of a hook (4) connected to a door (5), and a cam member (14) which is rotatable about
a pin (13) translatable along an axis parallel to the direction of insertion of the
hook (4), and which has a reaction profile (14a) disposed between a first recess or
notch and a second recess or notch (14b, 14c). The cam member (14) is capable of:
- adopting a rest position in which it is adjacent the opening (3) and its reaction
profile (14a) bears against a stop member (25), and in which its first notch (14b)
faces towards the opening (3) and can house an end portion (4a) of the hook (4) when
the latter (4) is inserted in the opening (3), and
- performing, as a result of a further insertion of the hook (4), a reversible rotational/translational
movement towards a working position in which it is adjacent the stop member (25),
which engages in its second notch (14c), and in which position the hook-like member
(4) is held in the first notch (14b).
A toggle mechanism (16) is connected to the cam member (14), and can adopt a first
configuration and a second configuration in which it tends to keep the cam member
(14) in the rest position and in the working position, respectively.
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