| 摘要 |
A workbasket assembly for surrounding and protecting a workman when cleaning or maintaining a tall structure such as a building, tank or silo. T he workbasket assembly comprises a frame made up from a plurality of vertical uprights and horizontal rails connected together by a plurality of pivot tab s. The workbasket assembly may be collapsed for storage or transport purposes or so that it may be passed through a relatively small aperture in a structure such as a tank. When expanded, the workbasket assembly is engageable with a hoist-operable base that permits the workman to be safely raised or lowered relative to the structure being maintained. The frame is only movable to the fully collapsed condition when detached from the base. The workbasket assembly can be expanded and collapsed without the use of any tools.
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