(57) A retention device for swing-leaves, which comprises at least one hinge constituted
by at least one bracket that is integral with the leaf, at least one tab that is integral
with a fixed frame, and at least one pivot, which is accommodated at least partially
within the at least one hinge. At least one between the at least one bracket and at
least one tab comprises an internal cavity whose shape and dimensions are complementary
to those of a first end of the pivot. The pivot is able to translate parallel to its
own axis, by way of the action of a respective actuator, between a first free configuration,
in which it is spaced from the internal cavity, and a second blocking configuration,
in which it is inserted within the cavity, with resting of at least one portion of
its outer surface on at least one corresponding portion of the inner surface of the
cavity and consequent mutual retention.
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