(57) An expander for table legs consists of two elements, internal and external, joined
to each other in a coaxial position by a threaded unit, wherein the internal element
is a truncated cone body (12), having an external lateral surface (20) in the form
of a truncated cone, sloping at an angle (α) with respect to the vertical, and equipped
with a threaded hole (14), and wherein the external element, elastically deformable,
consists of an accordion wall (13) with a radial sectored structure, in which sectors
(24) form an external cylindrical contact surface (26), which interacts with an internal
surface of a hollow tubular leg (34) and in which sectors (25) form an internal truncated
cone contact surface (27) sloping at an angle (α), the angle (α) belonging to a inclination
range which is such as to optimize the distribution of acting forces in the expander
(10) during tightening.
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