EP2011546A1 - Absturzsicherungsvorrichtung und Sicherheitsanlage, die eine solche Vorrichtung umfasst - Google Patents

Absturzsicherungsvorrichtung und Sicherheitsanlage, die eine solche Vorrichtung umfasst Download PDF

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Publication number
EP2011546A1
EP2011546A1 EP08356099A EP08356099A EP2011546A1 EP 2011546 A1 EP2011546 A1 EP 2011546A1 EP 08356099 A EP08356099 A EP 08356099A EP 08356099 A EP08356099 A EP 08356099A EP 2011546 A1 EP2011546 A1 EP 2011546A1
Authority
EP
European Patent Office
Prior art keywords
pulley
rollers
groove
cable
zone
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.)
Withdrawn
Application number
EP08356099A
Other languages
English (en)
French (fr)
Inventor
Bernard Georges Cuny
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.)
Gamesystem
Original Assignee
Gamesystem
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 Gamesystem filed Critical Gamesystem
Publication of EP2011546A1 publication Critical patent/EP2011546A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope
    • 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
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/186—Rail or rope for guiding a safety attachment, e.g. a fall arrest system

Definitions

  • the invention relates to an anti-fall device and to an installation comprising, among others, at least one such device.
  • the invention intends to remedy more particularly by proposing a new fall arrest device whose efficiency is comparable to that of known equipment but which allows a progressive blocking of a user in case of a fall.
  • the invention relates to an anti-fall device which comprises a braked pulley and two rollers, this pulley and these rollers being rotatably mounted relative to a body of the device and each provided with a peripheral receiving groove of a belay cable, the braked pulley being equipped with at least one ratchet adapted to come, under the effect of the centrifugal force bearing against an abutment integral with the body, while the rollers are mounted idle relative to the body which defines an attachment zone of a security organ linked to a user.
  • This device is characterized in that the respective diameters of the pulley and rollers and the positions of their respective axes of rotation relative to the aforementioned body are such that a tensioned cable engaged in the grooves of the pulley and rollers is received in the groove of the pulley, resting on the sides or the bottom of the groove, on a sector whose angle at the summit is less than or equal to 135 °.
  • the braked pulley in the case of rapid movement of the device along a cable, the braked pulley is blocked when its pawl or pawls abut against the corresponding part of the body and, to the extent that the cable is received in the groove of this braked pulley on a relatively small corner angle at the relatively small vertex, this cable can slide slightly in the groove of this pulley, which allows a corresponding absorption of the impact energy and reduces the risk of injury to the patient. 'user.
  • the invention also relates to a safety installation, which can be reported on a vertical structure such as a pylon or a pole and which comprises at least one stretched belay cable and at least one device as previously described.
  • its rounded bottom may be in an arc of circle, with a radius included with 50% and 70% of the nominal radius of the cable, preferably between 60 and 65% of this radius.
  • the pylon 1 represented at figure 1 is provided with a ladder 2 allowing a user 3 to climb to the vicinity of its vertex 4 to perform installation or maintenance operations, then down.
  • a cable 5 is hooked by a loop 5a to a tab 6 provided near the vertex 4.
  • the cable 5 is stretched under the effect of the weight of a ballast 7 fixed to the lower end of the cable 5.
  • the user 3 is equipped with a harness 8 connected by a strap 9 to a carabiner 10 hooked on an anti-fall device 20 intended to circulate along the cable 5 by accompanying the user in his normal movement of ascent and descent on the scale 2.
  • the device 20 comprises a body 21 formed of two flanges 21a and 21b, the flange 21b not being shown on the figure 2 for the clarity of the drawing.
  • the flanges 21a and 21b are hinged relative to each other about an axis X 21 materialized by two hinges 21c and 21d.
  • the flanges 21a and 21b are hinged relative to each other by means of a single hinge.
  • the body 21 is equipped with three shafts 22, 23 and 24 respectively defining articulation axes X 22 , X 23 and X 24 for a braked pulley 32 and for two identical rollers 33 and 34 mounted idle about the axes X 23 and X 24 .
  • Bearings 22a, 23a and 24a are arranged between the shafts 22 to 24 and the pulleys or rollers 32 to 34.
  • the pulley 32 is equipped with two pawls 321 and 322 each articulated around a pin 323, respectively 324, extending parallel to the shaft 22.
  • a coil spring 325 connects the pawls 321 and 322 and opposes a force centrifugal exerted on the pawls 321 and 322 in case of rotation of the pulley 32, under the effect of the inertia of these pawls.
  • Two stops 326 limit the approaching action exerted by the spring 325 in the vicinity of the ends 321a and 322a pawls 321 opposite the pins 324 and 325.
  • the pawls 321 and 322 are mounted on the side 327 of the pulley 32 facing the flange 21a which is equipped with four stops 21e intended to receive bearing one or the other of the ends 321a and 322a when the centrifugal force resulting from the rotation of the pulley 32 is sufficient to spread the ends 321 and 322a stops 326 to the point that their trajectory meets one of the stops 21 e.
  • the pulley 32 is provided with a peripheral groove 328 in which a portion of the cable 5 is received when the device 20 is mounted on this cable.
  • the rollers 33 and 34 are also each provided with a peripheral groove 338, respectively 348, in which is also received a portion of the cable 5 in the mounted configuration of the device.
  • the flange 21b can pivot relative to the flange 21a, around the axis X 21 , to allow access to the elements 32 to 34 to install the cable 5 in the grooves 328, 338 and 348.
  • the orifices 21f and equivalents thus constitute a hooking zone of the safety carabiner 10 which is shown in section at the figure 2 .
  • a not shown lock makes it possible to maintain the flanges 21a and 21b in a parallel configuration around the elements 32 to 34.
  • the carabiner 10 When the cable 5 has to be taken out of the device 20, the carabiner 10 is removed and the flanges 21a and 21b are opened to release the cable 5 from the grooves 328, 338 and 348.
  • D 32 , D 33 and D 34 denote the diameters of the elements 32 to 34 respectively.
  • the path of the cable 5 in the device 20 is imposed by the positioning of the axes X 22 , X 23 and X 24 with respect to the body 21, the values of the diameters D 32 , D 33 and D 34 and, to a lesser extent, the geometry of the grooves 328, 338 and 348.
  • This positioning and this diameter are chosen so that the angular sector S on which the cable 5 is received in the groove 328, bearing on the sides or the bottom of this groove, at an apex angle ⁇ of about 90 °.
  • This sector S is represented in gray at the figure 2
  • rollers 33 and 34 which are mounted idle, do not rotate about their respective axes X 23 and X 24 due to the penetration of the cable 5 into their respective grooves 338 and 348.
  • the diameters D 33 and D 34 are smaller than the diameter D 32 .
  • the diameter D 32 may be of the order of 70 mm, while the diameters D 33 and D 34 are of the order of 40 mm.
  • the diameter of the idle rollers is between 60 and 70% of the diameter of the braked pulley, preferably of the order of 2/3 of this diameter.
  • the pulley 32 and the rollers 33 and 34 are made of aluminum type AU-7G, while the cable 5 is made of stainless steel. This avoids the risk of seizure between, on the one hand, the pulley and the rollers and, on the other hand, the cable, such a risk may occur if all these elements are made of stainless steel. It is important to avoid, as far as possible, the seizure of the cable in the grooves of the rotating parts.
  • AU-7G aluminum can be easily cast for the production of parts 32 to 34 and has good mechanical stability, which allows it to effectively withstand the forces to which these parts are subjected.
  • an aluminum alloy may be used for the manufacture of parts 32 to 34.
  • a synthetic resin-based composite material filled with reinforcing fibers may be envisaged, for example polyamide heavily loaded with glass fibers or aramid fibers.
  • the X axes 23 and X 24 are offset in the direction of the X axis 21 , to which they are perpendicular, by a distance d with respect to the X axis 22 , to which they are parallel.
  • the X axes 23 and X 24 are located, with respect to the X axis 22 , on the same side as the angular sector S. This makes it possible to reduce the value of the angle ⁇ .
  • the value of the angle ⁇ is greater than 60 ° to ensure that the cable 5 bears on the sides or bottom of the groove 328 over a length at least equal to the pitch of the strands constituting the cable 5, which allows the distribute the force exerted on this cable, particularly in the event of a fall.
  • the diameters D 33 and D 34 of the rollers 33 and 34 may be substantially equal to, or greater than, the diameter D 32 of the pulley 32. It is indeed possible to play on the distance d to maintain at the angular sector S an angle ⁇ at the summit less than 135 °.
  • the X axes 23 and X 24 may not be located, with respect to the X axis 22 , on the same side as the angular sector S. Indeed, it is it is possible to adapt the diameters D 33 and D 34 of the rollers 33 and 34 to this situation and to accommodate a slight increase in the value of the angle ⁇ , provided that it remains less than 135 °.
  • the geometry of the groove 328 emerges more particularly from the figure 4 where it is noted that it can be decomposed into three zones Z 1 , Z 2 and Z 3 , the zone Z 1 constituting the bottom of the groove 328, while the zone Z 2 constitutes a transition zone between the zone Z 1 and the zone Z 3 extending to the outer radial surface 329 of the wheel 32.
  • the zone Z 1 is defined by an arc of a circle of radius R 1 equal to Approximately 1.5 mm when the cable 5 has a diameter of 4.8 mm.
  • the cable 5 is shown in its normal configuration while the device 20 is moving along the cable 5, at the level of the arrow IV-IV at the figure 2 .
  • the groove 328 has a generally open V shape in the direction of the surface 329.
  • the sides 328a and 328b of the groove 328 move away from one another. the other approaching the surface 329.
  • the opening half-angle ⁇ opening of the groove 328 has a value between 10 and 15 ° at the Z 2 zone, while the half-angle at the top ⁇ opening of the sides 328a and 328b of the groove 328 at the zone Z 3 has a value between 5 and 10 °.
  • the angle ⁇ advantageously has a value between 12 and 13 °, while the angle ⁇ has a value between 6 and 7 °.
  • the cable 5 which tends to slide towards the zone Z 1 in which it does not fully enter, is partially engaged in the zone Z 2 which is more "open That the zone Z 3 , so that the cable 5 is received without being crushed or "pinched" near the bottom of the groove 328.
  • the zones Z 1 and Z 2 have radial dimensions, equal to their heights on the figure 4 , substantially equal, of the order of 1 to 1.2 mm, while the zone Z 3 has a substantially greater radial dimension, of the order of 5 to 6 mm.
  • the zone Z 3 plays a role of convergent entry of the cable 5 to the zones Z 1 and Z 2 in the event of blockage of the pulley 32.
  • the geometry of the groove 338 is more particularly apparent from the figure 5 , it being understood that the groove 348 is identical.
  • This groove is generally open V-shaped with a rounded bottom. It can be decomposed into two zones, namely a bottom zone Z ' 1 of geometry substantially identical to that of the zone Z 1 of the groove 328 and a zone Z' 2 diverging in the direction of the outer peripheral surface 339 of the roller 33
  • the sides 338a and 338b of the groove 338 move away from each other from the zone Z' 1 towards the surface 339, with a half-angle at the apex ⁇ of between 6 and 8 °, preferably of the order of 7 °.
  • the cable 5 shown only in phantom at the figure 5 can thus bear in the vicinity of the bottom of the groove 338 by being in contact with the bottom and the sides of this groove about 2/3 of its diameter, which avoids a crushing of this cable as it could s' to produce if the groove 338 was in the form of a circular arc to the level of the surface 339.
  • the cable does not tend to deform and all strands and son constituting it work substantially the same way, which is advantageous.
  • the clearance in the hinges allows the opening of the body 21.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Braking Arrangements (AREA)
EP08356099A 2007-07-03 2008-07-03 Absturzsicherungsvorrichtung und Sicherheitsanlage, die eine solche Vorrichtung umfasst Withdrawn EP2011546A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0704802A FR2918287B1 (fr) 2007-07-03 2007-07-03 Dispositif anti-chute et installation de securite incorporant un tel dispositif

Publications (1)

Publication Number Publication Date
EP2011546A1 true EP2011546A1 (de) 2009-01-07

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EP08356099A Withdrawn EP2011546A1 (de) 2007-07-03 2008-07-03 Absturzsicherungsvorrichtung und Sicherheitsanlage, die eine solche Vorrichtung umfasst

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EP (1) EP2011546A1 (de)
FR (1) FR2918287B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2095846A1 (de) * 2008-02-26 2009-09-02 Bornack GmbH & Co. KG Sicherungseinrichtung
CN101898015A (zh) * 2010-07-08 2010-12-01 重庆理工大学 轻轨高空逃生装置
CN102247664A (zh) * 2011-07-13 2011-11-23 周廷华 一种高楼逃生器
CN105536159A (zh) * 2016-01-04 2016-05-04 刘雷 一种高层建筑物逃生用安全钢索
EP3093050A3 (de) * 2015-04-22 2017-03-22 Oberalp Spa Sicherungsgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149047A5 (de) 1972-04-05 1973-03-23 Fertier Raymond
US5799753A (en) * 1994-01-05 1998-09-01 Peltier; Marcel Jose Anti-fall security apparatus
DE20015164U1 (de) * 2000-07-03 2000-12-28 Wimmer, Hans, 12055 Berlin Abseileinrichtung für Personen und Lasten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149047A5 (de) 1972-04-05 1973-03-23 Fertier Raymond
US5799753A (en) * 1994-01-05 1998-09-01 Peltier; Marcel Jose Anti-fall security apparatus
DE20015164U1 (de) * 2000-07-03 2000-12-28 Wimmer, Hans, 12055 Berlin Abseileinrichtung für Personen und Lasten

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2095846A1 (de) * 2008-02-26 2009-09-02 Bornack GmbH & Co. KG Sicherungseinrichtung
CN101898015A (zh) * 2010-07-08 2010-12-01 重庆理工大学 轻轨高空逃生装置
CN102247664A (zh) * 2011-07-13 2011-11-23 周廷华 一种高楼逃生器
EP3093050A3 (de) * 2015-04-22 2017-03-22 Oberalp Spa Sicherungsgerät
EP3725383A1 (de) * 2015-04-22 2020-10-21 Oberalp Spa Sicherungsgerät
CN105536159A (zh) * 2016-01-04 2016-05-04 刘雷 一种高层建筑物逃生用安全钢索
CN105536159B (zh) * 2016-01-04 2018-10-12 泉州市华凯智能科技有限公司 一种高层建筑物逃生用安全钢索

Also Published As

Publication number Publication date
FR2918287A1 (fr) 2009-01-09
FR2918287B1 (fr) 2009-10-09

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