| 摘要 |
PURPOSE:To obtain a selective carrier lift along a mast by cusing pulleys and a chain, whose fore end is formed into special structure, and by making said end freely attachable to the chain or the mast. CONSTITUTION:A mast 16 is supported by a three-point link located at a tractor rear end, and it moves up and down by means of a lift arm 6. A vertically moving frame 25 that is supported by a chain 29 is installed on the vertical mast 16 moving free. The chain 29 is hung on pulleys 23 and 31, whereas a joint 51, or an end of the chain 29, is attached to the mast 16 or the chain 29. By connecting the said joint 51 to the mast 16, the lift of a carrier 55 can be trebled, while by connecting the joint 51 to the chain 29 the lift can be doubled. In addition, by moving the pulley 23 upward in this state the carrier 55 can be lifted as much as the lift of the mast 16. Thus, the lift of the carrier 55 along the mast 16 can be selected optionally. |
