| 摘要 |
A load unit is carried from the second carrier to the first, by the establishment of carrying relation between a carrying member (5) and a load unit (6) which lowers the load unit from an elevated position down onto the carrying member by lowering the securing members (7). They are arranged to be vertically movable, of the first carrier from an elevated position. The load unit (6), when it is located on a first carrier (1) is elevated for relieving the carrying member from load by elevating securing members (7) and arranged on that carrier so as to secure the load unit by engaging with the corresponding securing members (8) on the load unit. On transfer of the load unit (6) from the first carrier (1) to the second carrier (2a,b), extensioning of the arm (4) from the first carrier is supported by the second carrier, with displacement of the carrying member (5) as well as the load unit supported along the arm until the carrying member and the load unit are located in a position above the second carrier (2a,b). Elevation of the securing members is arranged on the second carrier, so that the load unit is elevated from the carrying member (5) returning of the carrying member along the arm to a position above the first carrier. |
