| 摘要 |
Disclosed herein is an apparatus for facilitating vertical entry into a confined entry space such as a manhole. The apparatus includes a trailer-type base, a support frame formed on the base for supporting a hoisting device, and stabilizing posts for stabilizing the support frame. The apparatus preferably also includes a barricade mounted on the base for preventing accidental entry into an area beneath the support frame, and can include a support arm for vertically transporting a weight over an edge. The apparatus provides for convenient entry into a manhole by a worker while preventing accidental entry by a pedestrian, and also can be used for raising and/or lowering persons and/or objects over the edge of a wall, cliff, or pit.
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