| 摘要 |
<p>A fall arrest traveller 1 comprises a housing, which defines a passageway for the safety line 100 and an actuation member 4 with arm 43, which is coupled to an engagement member 5 via a coupling member 6. On falling, the traveller 1 falls downwardly along the safety line 100. Due to the contact of the engagement member 5 with the safety line, friction between the safety line causes the engagement member 5 to move vertically upwards from a second position until it reaches a third position, in which protrusions 77 reach the ends 62 of the second slots 52 (figs 3& 4). As the engagement member 5 moves from a second position to a third position, it translates relative to the actuation member 4, i.e. relative to the coupling member 6, and the arcuate protrusion 93 of the arm 43 and abuts surfaces 74, 75 on the engagement member 5 to increase the force of engagement of the engagement member 5 with the safety line 100.</p> |
