| 摘要 |
Multiple attachment points for receiving universal adapters are retained by a relatively rigid structure in a generally rectangular orientation. The structure is rigidly attached to a structurally sturdy member such as the underframe of a vehicle. One arrangement of the attachment points employs four slots which are oriented at the effective corners of a rectangle and parallel to the anticipated direction of main tension loading. These slots are arranged to receive extension arms of a bracket-like adapter to which any of a wide variety of accessories can be mounted. For a vehicle, the slot-retaining frame can be rigidly secured to the underframe between the vehicle body and the protective bumper, attached to or included within a surface of the bumper or even mounted upon the flat bed surface of the vehicle body. In yet another arrangement of the mounting points, an arrangement of bars is rigidly secured to a box-like structure which is in turn secured to the vehicle body. A pivotal and slidable clamping arrangement permits engaging of the bars so as to secure the adapter to the vehicle frame.
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