Abstract: A fall shock absorber comprises a frame 5 formed by an elongated profile that has a U-shaped cross section. The frame comprises two parallel strips 11 which are attached to each other by a bridge 13. The strips accommodate tapered slots 15 through which a shaft 17 is projected. A bracket 19 to which a safety cable 21 is fixed is present on the shaft. The width of the slot at the wider end 15A is equal to the thickness of the shaft 17 and the width of the slot at the narrower end 15B is smaller than the thickness of the shaft. The material of the shaft 17 is softer than the material of the strips 11, so that when the shaft is displaced through the slots the shaft shows plastic deformation.

Abstract: A runner 7 has a housing 21 with two runner wheels 23 attached to the housing. The housing includes a sleeve 25 that can freely turn around the longitudinal axis 27 in a channel 29 present in the housing. The sleeve constitutes an elongated guide opening by which the runner can be moved over the guide cable. Longitudinal slots extending in axial direction are present in the walls 21A, 25A of the channel 29 and of the sleeve 25. Each slot has a middle section 31A, 33A. The width 34 of the middle section 33A of the longitudinal slot in the sleeve is smaller than the width 32 of the middle section 31A of the longitudinal slot in the housing, and, furthermore, the width 34 of the middle section 33A of the slot 33 in the sleeve is smaller than the diameter of the guide cable 3 the runner 7 is suitable for.