Manitowoc Crane Group France

Adrien Gourru

Jonathan Chalavon

Fabrice Thomas

Christophe Barbet

Cédric Fourier

Matthieu Cormier

A double-reeved lifting device includes a lower reeve block secured to a lifting hook and an upper reeve block, wherein the two reeve blocks include reversible connection means adapted to be reversibly configured between a connected configuration and a disconnected configuration. The reversible connection means include a locking mechanism and a complementary locking structure respectively having at least one striker orifice and a bolt slidably movable and supporting a locking finger adapted to rotatably cooperate with the striker orifice, and respective guide elements cooperating together so as to convert a relative approach and a relative distancing between the two reeve blocks into concomitants slidings and rotations of the bolt.

Double-reeved lifting device with a rotary locking mechanism

A double-reeved lifting device includes a lower reeve block secured to a lifting hook and an upper reeve block, wherein the two reeve blocks include reversible connection means adapted to be reversibly configured between a connected configuration and a disconnected configuration. The reversible connection means include a locking mechanism and a complementary locking structure having a frame securely supporting a bolt. The locking mechanism includes a chassis having a locking channel provided with a mouthpiece through which the bolt is configured to enter and exit and slide in the locking channel respectively upon a relative approach or distancing between the two reeve blocks, and at least one latch pivotally mounted on the chassis so as to pivot inside the locking channel, the latch provided with a free end adapted to engage with the bolt.

Double-reeved lifting device with a latch-locking mechanism

This defining method comprises the steps of: &#x2014;simulating a crane comprising: i) a boom made up of elements and ii) a lifting member that is able to move along the boom, &#x2014;selecting several elements to be tested, maximum stresses, and several ranges along the boom, and &#x2014;carrying out the following analysis steps of: &#x2022;choosing a theoretical load, &#x2022;calculating stresses brought about by the theoretical load in each element to be tested, &#x2022;comparing these stresses with maximum stresses, &#x2022;increasing or decreasing the theoretical load depending on whether stresses are less than or greater than the maximum stresses, &#x2022;repeating the calculating step and the comparison step and the step of increasing or decreasing until the maximum theoretical load is found, and &#x2022;recording i) the range and ii) the maximum theoretical load.

Method for defining an optimized load curve for a crane, method and control device for controlling the load suspended from a crane on the basis of the optimized load curve

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Lyons, France

Adrien Gourru