| 摘要 |
A band ( 30 ) is buckled around a pole ( 50 ). A hanger arm ( 18 ) has a top end attached to the band ( 30 ) at an attachment point ( 44 ), and has a bottom end with a load hook ( 20 ). A high-friction cam surface ( 24 ) is formed on the hanger arm ( 18 ). The relative positions of the cam ( 24 ), the band attachment point ( 44 ), and the load hook ( 20 ) cause the band attachment point ( 44, 46 ) to move away from the pole ( 50 ) as the hanger arm is loaded, tightening the band ( 30 ) on the pole ( 50 ). This automatically adjusts the hoop tension in the encircling band ( 30 ) depending on the arm loading ( 52 ).
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