| 摘要 |
A climbing device having an anchoring head on the end of a flexible main cable for insertion into a crevice in a rock wall. The head has multiple spring-biased cams which are wedged by a camming action into engagement with the walls of the crevice by pulling on the cable. For placement, the cams are actuated against the spring bias by an elongated flexible sleevelike structure coaxially supported and slidable on the cable. The sleeve structure has at one end a first plate connected by small flexible wire-like members to the cams for operating the cams against their spring bias. The sleeve structure has at its other end a second plate engageable by fingers of the climber to pull the structure along the main cable in the direction away from the cams and against the spring bias, the length of the structure permitting the cams and the first plate to be inserted deeply into the crevice where the first plate cannot be directly manipulated, the cable having a loop engageable by the thumb of the climber to permit one-hand insertion of the device into and release from the crevice by pushing the thumb toward the cams and pulling the sleeve structure by two fingers engaging the second plate. The flexibility of the coaxial main cable and sleeve allow movement of the second plate and the looped portion of the cable without causing movement of the cams from a wedged position.
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