| 摘要 |
A Simple Climber's Multi-Tool ( 10 ) is presented which performs multiple safety functions for the field of rock climbing. Most importantly, the device fulfills a heretofore unmet need for a convenient effective safety back-up device to be used with a solo lead climbing belay device. The Simple Climber's Multi-Tool ( 10 ) also functions as a standard belay and rappel device. With the addition of an Attachment Snap Hook ( 52 ), the device is an auto-locking belay device for one or two ropes. With the addition of a loop of cord, it can perform functions otherwise performed with specialty knots for safety and self-rescue such as the Prusik knot, Bachman knot, and Klemheist knot. The device comprises a Main Body ( 12 ) to which is attached a Snap Hook Containment Loop ( 20 ), and a First Snap Hook ( 24 ). A Rope Channel ( 18 ) runs through the device. A unique shape of the Back Face ( 15 ) of the device is of primary importance to its rope jamming capability. When used as a movable rope jam, the device can be easily moved along the rope when the First Snap Hook ( 24 ) is gripped and pulled with respect to either end of the rope, but will jam the rope against movement when the Main Body ( 12 ) of the device is constrained from movement and an end of the rope is pulled with respect to the device. Unlike the aforementioned specialty knots, which in order to jam a rope require that a pulling force be exerted on the knot from the direction upstream relative to the rope movement, the subject invention will jam the rope when the Main Body ( 12 ) encounters a constraining force which can either be a pulling force from upstream of the device or a pushing force from downstream of the device.
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