| 摘要 |
An accessory for belaying and/or rappelling on a single or double rope. This accessory is a one piece component having a first through hole of a shape allowing a carabiner to be passed through it, a second through hole situated in a central position to the component the said first hole, the second hole allowing at least two strands of the rope to be passed through it, and a slot forming a notch communicating at its top, widest end with the second hole to allow the strand of rope from the second hole to be inserted into and locked in the slot. The accessory also includes between the first hole and the bottom, narrowest end of said slot, a boss extending transversely to the surface of the one-piece component and locally increasing the thickness of the component by at least as much as the diameter of the strand of rope. This boss forms on the surface of the one piece component a rope return element that makes it easier to manually release a strand of rope jammed in the slot.
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