Abstract: A movable crane arrangement includes a main girder for a trolley; end girders with running wheels to be supported on both ends of the main girder; running platforms for the running wheels of the end girders; and one elongated container, inside which at least part of the crane arrangement is placed in a disassembled or folded state for transport, if desired. One running platform is arranged to be implemented on the roof of the container at a selected height, and the other running platform is arranged to be implemented on the erecting platform of the crane arrangement. A method for erecting such a crane arrangement is also provided.

Abstract: An arrangement in connection with a movable hoisting apparatus includes at least one imaging device and a processor provided in connection with the movable hoisting apparatus. The imaging device is adapted to save images which at least partly present the surroundings of the hoisting apparatus. The processor is adapted to identify at least one identifiable object from at least two images saved at different time instants and to determine the direction and speed of travel of the hoisting apparatus based on the position of the identifiable object in the images.

Abstract: A movable crane arrangement includes a main girder for a trolley; end girders with running wheels to be supported on both ends of the main girder; running platforms for the running wheels of the end girders; and one elongated container, inside which at least part of the crane arrangement is placed in a disassembled or folded state for transport, if desired. One running platform is arranged to be implemented on the roof of the container at a selected height, and the other running platform is arranged to be implemented on the erecting platform of the crane arrangement. A method for erecting such a crane arrangement is also disclosed.

Abstract: A lifting hook, its safety latch and a locking and releasing device of the safety latch are disclosed. The lifting hook includes a hook body having a hook stem and tip. The safety latch is pivotably fastened close to the stem so as to move the safety latch between an open position and a closed position, the safety latch being in its open position substantially against the inside of the hook body in a position that leaves a hook jaw free, while in the closed position a latch end extends across the hook jaw to the hook tip, closing the jaw on the inside thereof. The locking and releasing device of the safety latch includes a locking element that engages the inner surface area of the hook jaw at a distance below the fastening end of the safety latch, and a releasing lever that when turned, releases the locking element.

Abstract: A lifting hook, its safety latch and a locking and releasing device of the safety latch are disclosed. The lifting hook includes a hook body having a hook stem and tip. The safety latch has a fastening end and a free latch end, the fastening end of the safety latch being pivotably fastened close to the stem so as to move the safety latch between an open position and a closed position, the safety latch being in its open position substantially against the inside of the hook body in a position that leaves a hook jaw free, while in the closed position the latch end extends across the hook jaw to the hook tip, closing the jaw on the inside thereof. A spring arranged between the safety latch and hook body forces the latch end into the closed position.