Jib crane for agricultural purposes - has pivoted strut ensuring that jib does not contact sloping roof

摘要

The agricultural jib crane has the pivot bearing inside a building and the jib free end carries a grab. The swivelling movement of the jib ensures that it does not come into contact with the sloping roof. The jib (12) is able to swivel freely, and is carried by a support strut (10). This support is held on the platform (6) supported by pivot bearing (5). The support strut engages with the rear third part of the jib length. The angle between the jib axis and the strut axis is less than a right angle in the retracted position of the jib.