| 摘要 |
A rope grab is disclosed that has particular, but not exclusive, application to providing a fall arrest safety system for rope access climbers. The rope grab comprises a rope path that extends between a cam 14 and an abutment 16 located between two metal plates 10, 12. Holes 36 in the plates serve as connection means, by which the grab can be attached to a connecting line by a connector. When the device is supported from the connection means, the cam is urged by the rope 32 to a position in which it has a point of minimum radius proximal to the abutment such that the rope can slide between the cam and the abutment. When the connection means is pulled downwards, the cam is urged to a position in which a point of greater radius is proximal to the abutment. The rope is thus gripped between the cam and the abutment thereby resisting it movement through the rope grab. |
