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WO1997010876A1 - Dispositif d'absorption d'energie - Google Patents

Dispositif d'absorption d'energie Download PDF

Info

Publication number
WO1997010876A1
WO1997010876A1 PCT/GB1996/002327 GB9602327W WO9710876A1 WO 1997010876 A1 WO1997010876 A1 WO 1997010876A1 GB 9602327 W GB9602327 W GB 9602327W WO 9710876 A1 WO9710876 A1 WO 9710876A1
Authority
WO
WIPO (PCT)
Prior art keywords
lanyard
energy absorbing
absorbing device
slot
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1996/002327
Other languages
English (en)
Inventor
Paul Farr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spanset Inter AG
Original Assignee
Spanset Inter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spanset Inter AG filed Critical Spanset Inter AG
Priority to EP96931163A priority Critical patent/EP0851779B1/fr
Priority to DE69609979T priority patent/DE69609979T2/de
Priority to AU69958/96A priority patent/AU698797B2/en
Publication of WO1997010876A1 publication Critical patent/WO1997010876A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means

Definitions

  • the present invention relates to an energy absorbing device for use in an energy absorbing system coupled to an object, for example a fall arresting system.
  • the invention relates to a device which is used with a
  • the lanyard is extensible and incorporates an energy absorbing device whereby frictional contact between the lanyard and said device controls the force applied to the work person in a fall
  • An energy absorbing device of this kind is described in European Patent Application No. 92904028.5 b ⁇ Henry Crawford and comprises a body defining a longitudinal slot passing therethrough for receiving at least two layers of lanyard material in a tight- fitting relationship, the layers being movable in opposite directions, and communication means for permitting formation of a loop of lanyard material externally of said body, whereby in the event of energy absorption demand, said lanyard material is moved relative to said energy absorbing device and friction between said lanyard and said device controls the force applied to the object.
  • a disadvantage of known energy absorbing devices such as the Crawford device is that after a fall the work person is left suspended in a position from which it may be difficult to rescue him.
  • an energy absorbing device for use in an energy absorbing system coupled to an object, said energy
  • absorbing device comprising: a body defining a longitudinal slot passing therethrough for receiving at least two layers of lanyard material in a tight- fitting relationship, the layers being movable in opposite directions, whereby, in the event of energy absorption demand, said lanyard material is moved relative to said energy absorbing device and friction between said lanyard and said device controls the force supplied to the object, characterised in that means is
  • said slot is defined by a fixed body part and a movable body part associated with a manually operable adjustment screw.
  • the slot width may be pre-set during manufacture and means is preferably provided for preventing inadvertent operation of said adjustment screw.
  • the preventing means is preferably a sheer pin interconnecting the body with a head of the adjustment screw so as to immobilise said screw.
  • the slot is preferably divided into
  • the energy absorbing device is preferably provided in combination with a length of lanyard material having looped ends for securing the device by hook means to an anchor point and a harness.
  • An intermediate section of the lanyard material is preferably folded into multiple layers so as to provide sufficient length of material for energy absorption and said further movement.
  • Fig. 1 shows a workman in an elevated position wearing a general purpose safet harness attached to a lanyard incorporating an energy absorbing
  • Fig. 2 shows the lanyard in greater detail with insets showing the energy absorbing device of the invention to an enlarged scale
  • Fig. 3 is a longitudinal section of the lanyard of Fig. 2
  • Fig. 4 is an exploded view of the energy absorbing device of the invention.
  • the illustrated lanyard indicated generally at 1 comprises an energy absorbing device 2 and a length of lanyard material 3.
  • the energy absorbing device 2 may be encapsulated in tough plastics material 4 in order to prevent tampering.
  • the lanyard material 3 is provided in a continuous length and has a relatively short section 3a extending to one side of the energy absorbing device 2 and a relatively long section 3b extending to the opposite side of the energ absorbing device 2.
  • Each lanyard section 3a, 3b terminates in a loop 5, 6 which is connected by hooks
  • the energy absorbing device 2 comprises a body 10 having two halves 10a, 10b defining therebetween a longitudinal slot 1 1.
  • the main body part 10b has a channel 12 flanked by side walls 13, 14 penetrated by holes 15 for socket headed cap screws one of which is shown at 16.
  • the through holes 15 are aligned with tapped holes (not shown) in the underside of the cover body part 10a.
  • the cover part 10a of the body 10 is also provided with a channel 17, facing the channel 12 and having terminal recesses 18, 19.
  • the channels 12, 17 define a longitudinal passageway of fixed width determined by the spacing in between the
  • a slipper 20 in the form of a rectangular plate with upturned ends 21, 22 defines between its underside as seen in Fig. 4 and the floor of channel 12 the slot 11 which is of variable width.
  • a separator plate 23 for dividing the slot 11 into two passages to either side of the plate 23 is located
  • An adjusting screw 28 (see inset to Fig. 2 and Fig. 3) has a head 29 in the form of a manual control knob and is in screw-threaded engagement with a tapped hole 30 in the cover 10a. The adjusting screw 28 extends through the hole 30 into engagement with the upper surface of the central part of the slipper 20 thereby urging the slipper 20 a predetermined
  • the energy absorbing device 2 is factory assembled with the slot 11 set to a predetermined width and the control knob 29 temporarily fixed in the corresponding position by means of a sheer pin
  • the side walls 13, 14 of the main body part 10b extend beyond the channel 12 to provide locating pins 32, 33 for loops of lanyard material.
  • lanyard sections 3a, 3b are provided by a continuous length of lanyard material which is looped at its one end about the pin 33, is folded to form the loop 5 at the outer end of the section 3a and is then returned over the underside of the energy absorbing device 2 within the plastics sleeve 4 and via multiple folded layers 34 through the slot 11 in one direction under the separator plate 23, around the pin
  • the lanyard section 3a has its various layers stitched together while the layers of webbing material constituting the lanyard section 3b are encased in a sheath 35 to permit movement in use as will now be described.
  • an initial free fall is arrested by the energy absorbing device 2 in known manner in that the layers of webbing material trapped in the slot 11 to either side of the separating plate 23 are caused to move relative to each other with
  • the work person or a rescuer can turn the control knob 29, after initially shearing the pin 31 so as to release the adjusting screw 28.
  • the slot 11 is thus enlarged to permit relative movement of the webbing material in the slot 11 and enable a controlled decent of the work person to the extent permitted by the webbing material remaining in the lanyard section 3b. It should be noted that full release of the adjusting screw 28 increases the width of the slot 11 to an extent sufficient to permit fairly rapid descent but not completely uncontrolled descent, i.e. with the screw 28 fully retracted the maximum width of the slot 11 relative to the thickness of the webbing material is
  • the means for preventing inadvertent rotation of the control knob may involve, in place of the sheer pin 31, containment of the control knob 29 within the plastic sheath 4, although a sheer pin is preferred as giving a visible indication that the control knob has not been tampered with.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

La présente invention a pour objet un dispositif d'absorption d'énergie associé à un objet. Ledit dispositif contient une partie corps dotée d'une fente longitudinale pouvant recevoir au moins deux couches de cordon ajustées serrées. Les couches peuvent se déplacer dans des directions opposées ce qui, en cas de nécessité d'absorption d'énergie, entraîne un déplacement du cordon par rapport audit dispositif. La friction entre le cordon et le dispositif contrôle la force de l'objet. Il est possible d'augmenter la largeur de la fente après arrêt de l'objet, ce qui réduit la friction et permet de contrôler la suite du mouvement de l'objet. L'invention prévoit une chute à deux étapes avec contrôle de la descente après la première chute.
PCT/GB1996/002327 1995-09-21 1996-09-20 Dispositif d'absorption d'energie Ceased WO1997010876A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP96931163A EP0851779B1 (fr) 1995-09-21 1996-09-20 Dispositif d'absorption d'energie
DE69609979T DE69609979T2 (de) 1995-09-21 1996-09-20 Eine energieabsorbierende vorrichtung
AU69958/96A AU698797B2 (en) 1995-09-21 1996-09-20 An energy absorbing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9519250.6A GB9519250D0 (en) 1995-09-21 1995-09-21 An energy absorbing device
GB9519250.6 1995-09-21

Publications (1)

Publication Number Publication Date
WO1997010876A1 true WO1997010876A1 (fr) 1997-03-27

Family

ID=10781021

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002327 Ceased WO1997010876A1 (fr) 1995-09-21 1996-09-20 Dispositif d'absorption d'energie

Country Status (7)

Country Link
EP (1) EP0851779B1 (fr)
AU (1) AU698797B2 (fr)
CA (1) CA2228035A1 (fr)
DE (1) DE69609979T2 (fr)
ES (1) ES2150691T3 (fr)
GB (1) GB9519250D0 (fr)
WO (1) WO1997010876A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034147A1 (fr) * 2005-09-23 2007-03-29 Uniline Safety Systems Limited Absorbeur d'energie
US7665575B2 (en) 2004-03-01 2010-02-23 Ykk Corporation Of America Shock absorbing fabric structures
US7726350B2 (en) 2005-08-16 2010-06-01 Ykk Corporation Of America Energy absorbing webbings
GB2490682A (en) * 2011-05-10 2012-11-14 Checkmate Ltd Fall arrest device with energy dissipation by friction
US8316988B2 (en) 2010-08-12 2012-11-27 Ykk Corporation Of America Shock absorbing fabric structures
US8387749B2 (en) 2004-03-01 2013-03-05 Ykk Corporation Of America Shock absorbing fabric structures
US9328436B2 (en) 2013-03-14 2016-05-03 Ykk Corporation Of America Energy absorbing fabric and method of manufacturing same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100996A (en) * 1977-06-06 1978-07-18 Sharp Jonathan E Shock absorber for a safety belt lanyard
WO1986004507A1 (fr) * 1985-02-04 1986-08-14 Meschke Juergen Peter Erich Fixation et harnais pour corde de rappel
WO1991010475A1 (fr) * 1990-01-18 1991-07-25 Michael Bell Systeme de descente et de securite empechant les chutes, procedes d'utilisation et organes de retenue du corps utilisables avec ledit systeme
WO1992013601A1 (fr) * 1991-02-06 1992-08-20 Henry Crawford Dispositif d'absorption d'energie
US5379858A (en) * 1993-09-20 1995-01-10 Sandoval; Alfredo R. Compact emergency descender system
WO1995001815A2 (fr) * 1993-07-06 1995-01-19 Latchways Limited Dispositif antichute a absorption d'energie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100996A (en) * 1977-06-06 1978-07-18 Sharp Jonathan E Shock absorber for a safety belt lanyard
WO1986004507A1 (fr) * 1985-02-04 1986-08-14 Meschke Juergen Peter Erich Fixation et harnais pour corde de rappel
WO1991010475A1 (fr) * 1990-01-18 1991-07-25 Michael Bell Systeme de descente et de securite empechant les chutes, procedes d'utilisation et organes de retenue du corps utilisables avec ledit systeme
WO1992013601A1 (fr) * 1991-02-06 1992-08-20 Henry Crawford Dispositif d'absorption d'energie
WO1995001815A2 (fr) * 1993-07-06 1995-01-19 Latchways Limited Dispositif antichute a absorption d'energie
US5379858A (en) * 1993-09-20 1995-01-10 Sandoval; Alfredo R. Compact emergency descender system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7665575B2 (en) 2004-03-01 2010-02-23 Ykk Corporation Of America Shock absorbing fabric structures
US7677360B2 (en) 2004-03-01 2010-03-16 Ykk Corporation Of America Shock absorbing fabric structures
US8387749B2 (en) 2004-03-01 2013-03-05 Ykk Corporation Of America Shock absorbing fabric structures
US8387750B2 (en) 2004-03-01 2013-03-05 Ykk Corporation Of America Shock absorbing fabric structures
US7726350B2 (en) 2005-08-16 2010-06-01 Ykk Corporation Of America Energy absorbing webbings
WO2007034147A1 (fr) * 2005-09-23 2007-03-29 Uniline Safety Systems Limited Absorbeur d'energie
AU2006293721B2 (en) * 2005-09-23 2011-04-14 Uniline Safety Systems Limited Energy absorber
US8316988B2 (en) 2010-08-12 2012-11-27 Ykk Corporation Of America Shock absorbing fabric structures
US8567559B2 (en) 2010-08-12 2013-10-29 Ykk Corporation Of America Shock absorbing fabric structures
GB2490682A (en) * 2011-05-10 2012-11-14 Checkmate Ltd Fall arrest device with energy dissipation by friction
EP2522399A3 (fr) * 2011-05-10 2014-02-26 Checkmate Limited Appareil antichute
US9328436B2 (en) 2013-03-14 2016-05-03 Ykk Corporation Of America Energy absorbing fabric and method of manufacturing same

Also Published As

Publication number Publication date
CA2228035A1 (fr) 1997-03-27
DE69609979D1 (de) 2000-09-28
DE69609979T2 (de) 2001-01-18
ES2150691T3 (es) 2000-12-01
AU6995896A (en) 1997-04-09
AU698797B2 (en) 1998-11-05
GB9519250D0 (en) 1995-11-22
EP0851779A1 (fr) 1998-07-08
EP0851779B1 (fr) 2000-08-23

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