| 摘要 |
A self-belay device for controlling climbing and descending along a rope. The self-belay device comprises a hollow casing, a linear frictionless track fixed inside the casing and a braking unit disposed in the casing and mounted on the track for reciprocating sliding movement along the track between a first position and a second position. The braking unit is normally biased to the first position. The braking unit has a passage there through for passing of the rope. The rope is moveable through the passage in the braking unit in the first position, while the movement of the rope through the passage in the braking unit prevented in the second position thereof. |
