| 摘要 |
PROBLEM TO BE SOLVED: To provide an unloading device with high portability and high storage capability, capable of easy assembling to a usual ladder, enhancing load resistance since the strength of a support of the ladder body is added to a guide rail, and if necessary, simply fitting a carriage and additionally mounting a winch hoisting the carriage. SOLUTION: This unloading device is assembled to the ladder body 1 having foot bridges 6 made from a tube body between a pair of right and left supports 5, guide rails 2 are arranged along the supports 6 of the ladder body 1, supporting rods 9 installed in the guide rails 2 are inserted into the foot bridges 6 having openings 7 formed on the sides of the supports to fix the guide rails 2 to the ladder body 1, and the top surfaces 10 of the guide rails are set in the positions higher than the supports 5. The carriage 3 is fit to the guide rails 2, and the electric winch 4 hoisting the carriage 3 is mounted on the ladder body 1 if necessary.
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