| 摘要 |
PURPOSE:To make efficient the loading work by a method wherein the fastened part of loading wire is wound in the direction reverse to an elevating wire in relation to the drum of a elevating winch so as to utilize the weight of a cargo for helping the winding force of the elevating winch. CONSTITUTION:A wire 31 is rolled out from a winch 34 for loading, and a cargo is hoisted by a movable pulley 33 with hook suspended from the top of a boom. Then the half of the weight of this cargo falls as a tension on the drum 40' of an elevating winch 40 through the intermediary of the wire. This means that the tension acts in the direction wherein an elevating wire 41 is wound. Therefore, the tension helps the elevating winch 40 wind the wire 41 when the winch 40 is driven to move the boom upward, so that the required power of the winch can be reduced. |
