| 摘要 |
A device for connecting and disconnecting a lifting or drawing hook to and from respectively a couple. The hook has a passage for the couple located close to the free end portion of the hook and is rotatable between a position for releasing and/or receiving the couple, in which the passage is directed in a first direction relative to the axis of rotation of the hook, and a position for grabbing the couple, in which the passage is directed in a second direction diverging from the first direction. The hook has a locking means co-operating with an operating means located at the passage, the locking means being, on one hand, arranged to move from a locking position by the influence of the operating means in connection with the entry of the couple through the passage, thus allowing the hook to be rotated to the position in which it grabs the couple. On the other hand, the locking means is arranged to adopt the locking position as soon as the hook is rotated to the position for releasing the couple and the couple is out of engagement with the hook, thus retaining the hook in the releasing and/or receiving position with the passage directed in the above-mentioned first direction relative to the axis of rotation.
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