Manual hoist for building cradle
The utility model a manual hoist for building cradle scaffolds, wherein, the releasing system of which is added with a secondary safety device. The utility model is characterized in that the plane surface of a releasing connecting rod is provided with a special-shaped groove; the inner side of the s...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The utility model a manual hoist for building cradle scaffolds, wherein, the releasing system of which is added with a secondary safety device. The utility model is characterized in that the plane surface of a releasing connecting rod is provided with a special-shaped groove; the inner side of the special-shaped groove of the releasing connecting rod is provided with a shifting shaft with a circular arc. When the circular arc of the shifting shaft is matched with a rectangular position of the special-shaped groove of the releasing connecting rod, a releasing handle can not be opened. Therefore, an operator can open the handle when the circular arc of the shifting shaft is separated from the rectangular position of the special-shaped groove of the releasing connecting rod. Thus, the utility model prevents a wrong operation of a manual hoist. |
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