| 摘要 |
<p>The current invention is concerned with a device for lifting loads and a method for erecting the same. The device at least comprises a cylindrical mast (1) with an axis and a jib which is attached to the mast (1), the mast (1) for standing vertically and the jib for extending horizontally, The device is characterized in that the jib is attached to the mast (1) such that it can be moved along the axis of the cylindrical mast (1). Making the jib movable along the axis of the mast allows for responding to strong winds by moving the jib down the mast thereby improving usability of the device. Similarly in case of ice built up on the jib, the jib can be moved down freed from ice and moved up again.</p> |
