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Machine translation
1. (WO1981000706) DEVICE FOR SERVO CONTROLLING THE RELATIVE POSITION AND SPEED OF THE HEADS OF TWO BOOMS OF A DOUBLE PIVOTING CRANE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000706    International Application No.:    PCT/FR1980/000135
Publication Date: 19.03.1981 International Filing Date: 02.09.1980
IPC:
B66C 13/30 (2006.01), B66C 13/48 (2006.01)
Applicants:
Inventors:
Priority Data:
7922380 07.09.1979 FR
Title (EN) DEVICE FOR SERVO CONTROLLING THE RELATIVE POSITION AND SPEED OF THE HEADS OF TWO BOOMS OF A DOUBLE PIVOTING CRANE
(FR) DISPOSITIF D"ASSERVISSEMENT DE LA POSITION ET DE LA VITESSE RELATIVES DES TETES DES DEUX FLECHES D"UNE GRUE PIVOTANTE DOUBLE
Abstract: front page image
(EN)Method for operating a double pivoting crane, the booms being fixed together by means of a connecting bar, by control of one of the two booms. The servo device comprises mainly in combination: - a measuring device (10) for measuring the actual angle (Alpha) formed by the projections on a horizontal plane of the two booms; - a measuring device (11 and 12) for measuring the actual picking angle (Alpha) and (Beta) of each of the booms, -calculating devices (13 and 14) for calculating the angles (Alpha) and (Alpha) in relation to the angle (Beta) and to the length p of the connecting bar used; - comparators (15 and 16) of which the outputs are respectively connected to the control members (17 and 18) of the angles (Alpha) and (Alpha). Application: handling of heavy loads on board of cargo ships.
(FR)La presente invention est prevue pour faire fonctionner une grue pivotante double, les deux fleches jumelees a l"aide d"un palonnier, par simple commande de l"une des deux fleches. Selon l"invention, le dispositif d"asservissement comporte essentiellement en combinaison: un dispositif de mesure (10) de l"angle reel (Alpha) forme par les projections sur un plan horizontal des deux fleches; un dispositif de mesure (11 et 12) de l"angle reel d"apiquage ((Alpha) et (Beta)) de chacune des fleches; des dispositifs de calcul (13 et 14) des angles (Alpha) et (Alpha) en fonction de l"angle (Beta) et de la longueur p du palonnier utilise; des comparateurs (15 et 16) dont les sorties sont respectivement connectees aux organes de commande (17 et 18) des angles (Alpha) et (Alpha). Application: manutention de charges lourdes a bord des navires-cargos.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)