Safety device for motorized access passageways

A safety device for motorized access passageways, comprising a movement and supporting mechanism of an oscillating access shutter, which includes an electric motor (30) suitable for activating, by means of at least one reducer, a mechanical control system, which supports the shutter and makes it oscillate, along a circumference arc, perpendicularly to the passage direction, so as to open or close the passageway, thanks to a swinging movement which, following a first rotation causes the closing of the passageway and following a subsequent rotation, opposite with respect to said first rotation, causes the opening of the passageway, characterized in that said mechanical control system comprises at least one shaped connecting rod (15), fitted, by means of at least one handle (16), onto the outlet shaft of said electric motor (30), said shaped connecting rod (15) also being connected to at least one vertical arm (11), which is fulcrumed, in correspondence with its ends, to a plurality of levers (12, 13, 14, 14′), characterized in that at least two of said levers (12, 13, 14, 14′) are mutually connected in correspondence of each of said ends of said vertical arm (11), said two levers (12, 13, 14, 14′) being centrally hinged, on each other, by means of a first connection pin (20, 21), onto a supporting structure (19) along the central axis (X) of said supporting structure (19), at least a second pin (32,33), which carries at least one elastic element (22, 25), being fixed to at least one of said hinged levers (12, 13, 14, 14′).