| 摘要 |
PROBLEM TO BE SOLVED: To provide a lift device capable of suppressing a cost with a simple structure, capable of suppressing a trouble, and capable of being surely lifted. SOLUTION: Spiral grooves 4a and 4b turning in the directions opposite to each other are provided in the outer periphery of a drum 4, and a wire rope 10 installed so as to lift a carriage 3 is wound on the drum 4.
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