| 摘要 |
A device for gripping a load structure comprises a first jaw member having a proximate end and a distal end, a second jaw member slidably mounted to the first jaw member and having a proximate end and a distal end. Each of the two jaw members is provided with a gripper. The device further comprises a fulcrum member mounted to the first jaw member near the proximate end thereof and a flexible element secured to the second jaw member near the distal end thereof operatively coupled to the fulcrum member for causing an externally applied pulling force on the flexible element to move the distal end of the first jaw member towards the distal end of the second jaw member so as to yield a first inward force between the first and second grippers. The device further includes a biasing member mounted to both the first and second jaw members for pulling the distal end of the first jaw member and the distal end of the second jaw member towards one another, causing a permanent second inward force between the first and second grippers that causes the device to automatically grip onto the load when it is installed thereon. The device is particularly suitable to be used for lifting a load, such as a barrel, since the weight of the load can be used as the externally applied force when the device is hung by its flexible element. The first and second jaw members are advantageously in the form of tubes or any other generally flat members so that the center of gravity of the device remains adjacent to the load so as not to unbalance it.
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