Clamp force control for load-handling device

B - Operations – Transporting – 25 – J

Patent

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Details

B25J 13/08 (2006.01) B25J 15/00 (2006.01) B65H 19/30 (2006.01) B66F 9/18 (2006.01) B66F 9/22 (2006.01) F15B 9/08 (2006.01)

Patent

CA 2555839

In a control for a load-handling device that includes an hydraulic gripper (14) which is intended to grip objects, such as one or more rolls or bales of paper material or other goods, through the medium of pressure in a clamping pressure line (32) leading to one or more hydraulic cylinders (30) that actuate gripping arms on the gripper (14), and on the other hand to lift said objects by actuation from a lifting device (22, 42), there is proposed the possibility of adapting the clamping force to the lifting force during a clamping and lifting operation, among other things by monitoring the lifting force of the lifting device (42) with the aid of sensor means (60), wherein a pressure reduction valve (36) is provided in the clamping pressure line (32), and a control means (50) is provided for controlling the pressure reduction valve (36) to a pressure in the clamping pressure line (36) that is proportional to the lifting force detected by the sensor means (60).

Dans un contrôle d'un dispositif de manutention de charge qui comprend une pince hydraulique (14) qui est destinée à saisir des objets, tels qu'un ou plusieurs rouleaux ou balles de papier ou d'autres marchandises, par le moyen de pression dans une ligne de pression de serrage (32) menant à un ou plusieurs vérins hydrauliques (30) qui actionnent les bras de préhension sur la pince (14), et d'autre part pour soulever lesdits objets par l'actionnement d'un dispositif de levage (22, 42), la possibilité est proposée d'adapter la force de serrage à la force de levage lors d'une opération de serrage et de levage, entre autres choses, en contrôlant la force de levage de l'appareil de levage (42) à l'aide d'un capteur (60), où un robinet de réduction de pression (36) est prévu dans la ligne de pression de serrage (32), et un moyen de contrôle (50) est prévu pour régler le robinet de réduction de pression (36) à une pression dans la ligne de pression de serrage (36) qui est proportionnelle à la force de levage détectée par le capteur (60).

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