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1. (WO2015174878) GRUE SUR PORTIQUE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

Rl. The portal crane for interventions, with reference to fig. 1 ... fig n, is a metallic structure (A) in the form of a folding portal, equipped with specific invention means that enables it to operate as an autonomous electric vehicle (B) as portal crane (C) and the domed work area (D), all designed for excellent performances outside specifically arranged areas and under harsh weather conditions.

R2. The folding portable metallic structure (A), as per the claim 1, characterized by the fact that consists of a cantilever (a), on which there can be distinguished the rectangular pipe-like cantilever (1), leaning the ends on a short beam (2) and a long beam (3) closed at the ends, with a cover (4) and the cover (5) and stiffened on the outside with a upper frame (6), equipped with two lifting eyelets (7) and, on one side the fork-foot (b), consisting the beam (8) with two fixing ends (9), stiffened with an outer beam (10), positioned in the continuation of the upper frame (6) and, on the other side, the pole-foot (c) with the fixing ends (11), stiffened with a beam (12), positioned as well in the continuation of the upper frame (6); to fulfil the folding function the fork foot (b) is fixed against the short beam (2) by means of a hinge (13), the pole-foot (c) is fixed against the long beam (3) with the hinge (13); latching in the open position is obtained through a locking mechanism (d) between the upper frame (6) and the beam (10), respectively beam (12), through interlocking eyelets (14) and crossing bolt (15); the folding / unfolding action is made by means of a driving mechanism (e) which consist of an electric block and tackle (16), positioned on the beam (2), respectively beam (3) with the cable(l 7), passed over a back-travel pulley (18), connected to the cantilever (a) fixed under through eyelet ( 19) on the fork-foot (b), respectively the pole-foot (c)

R3. Autonomous electric vehicle (B) characterized by the fact that it is obtained by providing the metal structure (A) with two drive pulleys (20) fitted on ends (9) of the fork foot (b) and a double-drive wheel (21) on the end (1 1) of the pole-foot (c), all enabled by servo disc motor (22) driven by a command and control unit (23), powered by an autonomous power source (24) of electrical generator or batteries group type; as regards the operation position, the axis of the wheels (20) and of the wheel (21) are fixed parallel to the cantilever (a), their contact with the ground

is arranged in an isosceles triangle pointing the double-drive wheel (21); the cinematic trajectory is obtained by performing swing motions, by controlling the speed rotation of the servo disc motor (22) which generates the rotation toward an instant centre of rotation (25) positioned on a line segment (26) that begins at half the height of the isosceles triangle, passes through the ground contact of the double-drive wheel (21) and goes on towards infinity

R4. The portal crane (C), as per the claim 1 , is powered by an independent source (24) and steer by a control and command system (23); is made up by providing the metallic structure (A) with a single cable (27) fixed at its ends with eyelets (28) on the cover (4), respectively the long beam (3); one part of the cable (27) parts is positioned beneath the cantilever (1) and, along with the translation motion mechanism (f), they support the hook (29) and enables it to get in motion beneath the cantilever (1); the other cable (27) part is positioned inside the cantilever (1) as part of a lifting mechanism (g) which varies the free length of the cable (27) and determines its vertical motion of the hook (29).

R5. The translation motion mechanism (f), as per the claim 1 and 4, characterized by the fact that it represents a metallic construction which covers the outer part of the cantilever (1), it rests on two rollers (30) and which, on one side, sustains the operation position, the two back-travel pulleys (31), the two back-travel pulleys of the cable (27) that bears the hook (29) and, on the other side, sustain the servo disc motor (32) with end pinion (33) geared with a rack (34) positioned beneath the cantilever (1).

R6. The lifting mechanism (g), as per the claim 1 and 4 and characterized by the fact that it consist on the one hand, of the special nut (35) provided on the side with two symmetrical cable pulleys (36) and on the front side with a rotation-blocking plate (37) and is linearly driven by a ball screw (38) controlled by an servo disc motor (39), with stress release on the cover 5 and, on the other hand, from a back- travel pulley (40) and a cable entry pulley (41), both fixed with a fork (42) to the cover (4).

R7. The domed work area (D), according to the claim 1, characterized by the fact that it is

provided with a stiffening frame (43) which consist of an upper frame (6), the beam (10) and beam (12) is considered as being part of the metallic structure on which, on the left and right side, it gets fixed a fan-shaped folding dome (44), each being made up of, on one side, the ribs (45), with opens in a fan and two joints (46), fastened at the base of the beam (10), respectively, of the beam (12) and, on the other side, of an easy- folding membrane (47); the folding domes (44) open and close singularly by means of standardized actuator mechanisms.