| 摘要 |
Manual braking and blocking system (descender) allowing the controlled descent along a rope or the control of a suspended load. The invention may be used in mountaineering, rock climbing, potholing, rescue or various work requiring the use of ropes. The system proposed makes it possible to control, regulate, cancel out the speed of sliding of the rope by means of the invention associated with two snap shackles (karabiners) b. Its specific form makes it possible to change the points of friction of the rope by easy manual action, this pulling force being decreased by the lever arm phenomenon. The rope makes two main loops, one over the snap shackles (karabiners) b at 13 and the other over the braking piece at 2. The main effort arrives via the rope at a. It is by virtue of slight braking, a pull at e that the user brakes and blocks the rope level with the component. Since the friction 2 and 3 is accentuated, the friction 1, which is the "adjustable" friction is increased. This friction 1 is demultiplied as a function of the load required at a. <IMAGE>
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