| 摘要 |
A safety anchor ( 20 ) for securing a user to a substantially vertical safety structure, e.g., elevator cable ( 21 ). Safety anchor ( 20 ) includes a back plate ( 26 ) to which are pivotally mounted a roller ( 28 ), inner cam assembly ( 30 ) and outer cam assembly ( 32 ). Each cam assembly ( 30,32 ) includes a lever arm ( 50,36 ) to which is mounted a cam ( 52,42 ). A user ( 25 ) is secured by means of carabiners and a short tether cable, for example, to the free ends of lever arms ( 50,36 ). Cable ( 21 ) threads between cams ( 52,42 ) which are pivoted to compress the cable in response to downward force exerted against the lever arms ( 50, 36 ).
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