EP3552668B1 - Descendeur autobloquant a poignee debrayable - Google Patents

Descendeur autobloquant a poignee debrayable Download PDF

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Publication number
EP3552668B1
EP3552668B1 EP19164787.4A EP19164787A EP3552668B1 EP 3552668 B1 EP3552668 B1 EP 3552668B1 EP 19164787 A EP19164787 A EP 19164787A EP 3552668 B1 EP3552668 B1 EP 3552668B1
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EP
European Patent Office
Prior art keywords
handle
cam
pin
stop
ramp
Prior art date
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Active
Application number
EP19164787.4A
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German (de)
English (en)
French (fr)
Other versions
EP3552668A1 (fr
Inventor
Pierre-Olivier Chabod
Christophe Quillard
Aurélie BERGEZ
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.)
Zedel SAS
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Zedel SAS
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Publication of EP3552668A1 publication Critical patent/EP3552668A1/fr
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Publication of EP3552668B1 publication Critical patent/EP3552668B1/fr
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    • 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

Definitions

  • the invention relates to a self-locking descender for descent along a rope according to the preamble of claim 1.
  • the invention also relates to a method of using a self-locking descender according to the preamble of claim 4 .
  • the disengagement threshold depends on the angular position of the handle, and on the force to be supplied according to the load applied to the device.
  • the document EP 2018894 describes an improvement of a self-locking descender which has a controlled disengagement of the mechanical connection between the pulley and the handle.
  • the descender has a so-called “anti-panic” function which allows when the friction force regulation handle reaches a threshold position to break the mechanical connection between the handle and the cam which performs the friction against the rope. Once the mechanical connection is lost, the cam returns to a blocking position which locks the rope and stops the descent. It is possible to reset the descender by moving the handle in the opposite direction.
  • the descender also has a button mounted on the end of the handle which cooperates with a ramp to form another mechanical contact between the handle and the cam so as to authorize the descent of the user when the handle is above. beyond the threshold position. By pressing the button, the anti-panic function is deactivated.
  • the object of the invention is to produce a self-locking descender with controlled disengagement of the mechanical connection between the cam and the handle, the disengagement being carried out automatically while informing the user that the handle is close to the threshold position.
  • the second pin and the second stop are arranged so that, during the first movement of the handle in the first direction of movement, the second pin comes into contact with the second stop before the handle forces the spring and reaches the threshold position.
  • the invention also relates to a method of using a descender which is easier to use.
  • the method is also remarkable in that the handle constrains a spring between the descent position and the first threshold position before reaching the threshold position.
  • the stressing of the spring makes it possible to impose a minimal and predetermined force on the handle to allow the user to better feel that he is approaching the threshold position.
  • the figure 1 illustrates a self-locking safety descender for descent along a rope 1.
  • the descender has a through hole intended to cooperate with a connector 2, for example a carabiner in order to mechanically fix the descender to the user and advantageously fix the descender to a harness worn by the user.
  • the descender has two entry/exit orifices which meet for the circulation of the rope 1 inside the descender.
  • the descender has a first flange 3 presented as a fixed flange and a second flange 4 presented as a mobile flange.
  • the movable flange 4 is mounted so as to be able to rotate with respect to the fixed flange 3 around an axis of rotation 4a. others configurations are possible.
  • the first and/or the second flanges 3 and 4 can be made of metal, for example of aluminum or aluminum alloy and also of steel or another iron-based alloy.
  • the second flange 4 is advantageously mounted to tilt to allow easy positioning of the rope 1.
  • the descender has an actuating handle 5 which is rotatably mounted relative to the fixed flange 3 at least.
  • the handle 5 is configured to move in a first direction of movement, for example counterclockwise or possibly clockwise.
  • the handle 5 can be mounted so as to rotate around an axis 5a.
  • the handle 5 is for example made of plastic or metal and it defines a cavity.
  • the handle 5 has an actuation zone, that is to say the zone where the user's hand will be placed to manage the position of the handle and therefore the friction on the rope 1.
  • the self-locking descender comprises a first flange 3 and a cam 6 which is mounted on the first flange 1.
  • the cam 6 is movably mounted on the first flange 1 and preferably mobile in rotation about an axis 6a which facilitates realization of the descender and the use of the cam 6.
  • the movement of the cam 6 with respect to the first flange 1 is different from one rotation or includes a rotation and another movement.
  • the cam 6 is movably mounted around the axis 2a.
  • the first flange 1 defines a rope circulation path by means of a side wall so that the rope circulates around the cam 6, more precisely between the cam 6 and a shoe 7 fixed to the first flange 3 or formed by the side wall of the first flange 3.
  • the cam 6 is equipped with a groove for winding the rope 1.
  • the cam 6 moves successively between a first cam position 6 called the rope locking position ( figure 4B and 5B ), a second position of cam 6 called the descent position authorizing the circulation of the rope 1 between the pad and the cam 6 ( figure 6B ).
  • the first position of cam 6 is a locking position where the distance between cam 6 and the pad is such that rope 1 is locked and cannot slip.
  • the blocking position the user is attached to the rope 1.
  • the blocking position corresponds to the minimum distance between the cam 6 and the shoe 7.
  • the movement of the handle 5 causes the movement of the cam 6. According to the movement of the cam 6, the distance between the cam 6 and the pad 7 increases or decreases to define the locking position and the intensity of the friction force .
  • the descent position is a position allowing the descent of the user along the rope 1 and therefore the sliding of the rope 1 between the cam 6 and the shoe 7.
  • the descent position is illustrated on the figure 6B .
  • the cam 6 is mounted with limited rotation around a first axis 6a, and cooperates with a braking surface of a fixed pad 7 to block or unblock the rope 1.
  • the axis 6a and the pad 7 are mounted on the first flange 3.
  • a return spring can be mounted so as to urge the cam 6 towards the blocking position to facilitate the blocking of the rope 1.
  • the spring can be a torsion spring which is preferably threaded onto the axis 6a. In the example illustrated, the descender does not have such a spring.
  • the modulation of the intensity of the frictional forces is carried out continuously by modulating the shape of the side wall of the cam 6 in order to modulate the space which exists between the side wall of the cam 6 and the side wall of the path circulation defined by the first flange 1.
  • the descender also has an interruptible mechanical connector which is configured to make a first mechanical connection between the actuating handle 5 and the cam 6 so that a first movement of the handle 5 causes the cam 6 to move from the first position. up to the second position. This displacement is illustrated between the figure 5A and 6A as well as between figure 5B and 6B .
  • a movement of the handle 5 causes a movement of the cam 6 which allows the cam 6 to move between the locking position and one or more lowering positions.
  • the handle 5 moves in the first direction of movement, for example from a standby position where the handle is not stressed, the handle 5 comes to form the first mechanical connection and then causes a movement of the cam 6 from the blocking position to the descent position.
  • the cam 6 can be shaped as self-locking and/or it can be associated with a spring which brings it back into the locking position so that a movement of the handle 5 according to a second direction of movement opposite to the first direction of movement causes a return of cam 6 to the blocking position by means of the rope under tension or the spring.
  • the descender has an "anti-panic" function, that is to say a configuration where the first mechanical connection between the handle 5 and the cam 6 is interrupted when the position of the handle 5 exceeds a threshold position during movement in the first direction of movement.
  • the threshold position is illustrated in figures 7A and 7B .
  • the interruptible mechanical connector is configured so that when the handle 5 reaches the threshold position in the first direction of movement, the first mechanical connection disappears.
  • cam 6 can be self-locking and/or be associated with a spring so that cam 6 returns to the first position, i.e. blocks rope 1.
  • the handle 5 mounted movably and can successively define a first position which corresponds to a blocking of the rope 1, a second position where the rope 1 slides in the descender and a third position also called the threshold position where the “anti-panic” function is triggered, that is to say where the first mechanical connection is interrupted.
  • the handle 5 is mechanically linked to the cam 6 so that the displacement of the handle 5 causes a displacement of the cam 6 to increase the distance between the side wall of the cam 6 and the side wall of the skate. 7. This increase in distance occurs until the position of the handle 5 relative to the first flange 3 reaches a threshold position. Once this threshold value has been reached, the first mechanical connection disappears and the cam 6 automatically returns to its blocking position. This loss of mechanical connection advantageously results in a handle 5 which is much more easily maneuverable so that the user is aware of the disengagement.
  • This hard point corresponds to a minimum force to be applied to the handle 5 to reach the threshold position. It appeared that the creation of this hard point makes it easy for the user to know that he is close to the threshold position and therefore to avoid losing the first mechanical connection. This hard point can be detected by the user without looking at the descender.
  • the force applied to the cam 6 may be low.
  • the user detects the hard point in the handle 5 and he can avoid losing the first mechanical connection by avoiding passing beyond the threshold position.
  • the additional force introduced by the descender to signal the threshold position is small compared to the force applied by the user to the handle 5 to manage his descent. This effort may not be noticed and will not prevent reaching the threshold position.
  • the inventors have noticed that it is particularly advantageous to provide for the additional force to be introduced by means of a second mechanical contact between the handle 5 and the cam 6 or the first flange 3.
  • the second mechanical contact makes it possible not to modify the behavior of the descender before the threshold position.
  • the handle 5 is associated with a spring 8 ( picture 3 ) which is configured to move the handle in the second direction of movement to a rest position.
  • the second mechanical contact between the cam and the handle is formed and the handle constrains a second spring 9.
  • the user must exert an additional effort which makes it possible to warn that the handle 5 is being brought closer to the threshold position.
  • the handle 5 forms a first cavity 5b intended to cooperate with an axis 5a projecting from the first flange 3 to define the axis of rotation 5a.
  • the handle 5 also has a first pin 10 arranged to cooperate with a first stop 11 of the cam 6.
  • the handle 5 and the cam 6 are configured so that the first pin 10 and the stop 11 form the first mechanical connection and the first pin 10 slides along the abutment so that when the handle reaches the threshold position, the first pin 10 escapes from the abutment 11 to interrupt the first mechanical connection.
  • the first pin 10 is fixed to a plate 12 itself fixed to the handle 5.
  • the plate 12 is for example fixed to the handle by means of one or more screws 13, but other fixing means are conceivable.
  • the first pin 10 is formed by a first rotating rod.
  • the first link 10 is fixed to the handle 5.
  • the first link 10 is mounted to move relative to the handle 5, for example by rotation by means of a rotation axis 10a fixed to the handle 5.
  • the first rod comes into contact with the cam 6 to form the first mechanical connection so that the movement of the handle 5 causes a movement of the rod which causes a movement of the cam 6.
  • the first link 10 is fixed to the plate by means of its axis of rotation 10a.
  • the first link 10 is associated with a third spring 13 configured to return the first link 10 to a rest position ( figure 2 ).
  • the rotation of the first connecting rod makes it possible to reset the first mechanical connection by facilitating the return of the first pin 10 facing the first stop 11 after the handle 5 has moved in the second direction of movement.
  • a ramp 14 is mounted on the handle 5.
  • the ramp 14 defines a second stop 15 intended to come into contact with a second pin 16 of the cam 6 to form the second mechanical connection between the handle 5 and the cam 6 which allows the spring stress 9.
  • the spring 9 is mounted so as to move the ramp 14 into a rest position.
  • the second stop moves along with the ramp out of the rest position and constrains the spring 9 which forces the user to apply a constraint to the handle 5.
  • the second mechanical connection between the handle 5 and the cam 6 is created before the handle 5 reaches the threshold position.
  • the spring 9 is constrained by the handle 5 before the handle 5 reaches the threshold position.
  • the ramp 14 is fixed to a support 17 by means of one or more screws 18.
  • the support 17 cooperates with the plate 12 which defines a guide ensuring the controlled movement in the ramp as the deformation of the spring 9 progresses. .
  • the cam 6 comes into contact with the ramp 14 and engages the second stop 15 stop, for example in the form of a bump just before the threshold position.
  • the second stop 15 can be formed by a bump or any other change in slope or shape which allows the cam 6 to slide then escape.
  • the handle 5 To continue to move the handle 5 in the first direction of movement, the handle 5 must act against the force applied by the rope 1 on the cam 6 as well as against the force applied by the spring 9.
  • the spring 9 opposes the movement of the handle 5 according to the first direction of movement and it defines a force to be overcome. This effort can be felt by the user who can deduce that he is close to the threshold position of the handle 5.
  • the ramp 14 is movably mounted inside a guide which makes it possible to define its movement.
  • the displacement is curvilinear and is substantially according to an arc of a circle around the axis of rotation 5a of the handle 5.
  • the ramp 14 cooperates with the second pin 16 mounted on the cam 6 so that the pin 16 slides along the ramp during the first movement of the handle 5 to come against the stop 15 of the ramp 14.
  • the second pin 16 moves and comes into contact with the second stop 15.
  • the second pin moves the second stop 15 when the handle rotates like this is illustrated in figures 6A and 7A .
  • the second pawn slides on the second stop 15 at the same time as the first pawn 10 slides on the first stop 11.
  • the second pin 16 slides on the second stop 15 and escapes the ramp 14. Simultaneously or almost simultaneously, the first pin 10 escapes from the first stop 11.
  • FIG 5A and 6A show a movement of the cam 6 relative to the shoe 7 caused by the handle 5 which induces a slippage of the rope 1.
  • Figure 7A the first mechanical link is interrupted and the cam will return to the blocking position as shown in figure 8A .
  • the figure 8B shows that the displacement of the handle 5 according to the first direction of displacement beyond the threshold position does not make it possible to form a new mechanical connection between the handle and the cam 6.
  • first stop 11 and the first pin 10 are arranged so that the first mechanical connection disappears for the same position of handle 5 as the second mechanical connection between the second pin 16 and the second stop 15. In such a way simultaneous or quasi-simultaneous the two mechanical connections between the handle 5 and the cam 6 disappear which induces an ease of movement of the handle 5 relative to the cam 6 warning the user that the threshold position has been reached.
  • the cam 6 has a second ramp 19 surmounted by the second pin 16.
  • the second ramp 19 is configured to define the first stop 11 and thus come into contact with the first pin 10.
  • the second ramp 19 is rotatably mounted relative to the cam 6 around an axis 19a.
  • the second ramp 19 is mounted to move relative to the cam 6 so that the movement of the pin 16 causes the movement of the cam 6.
  • the second ramp defines stop 11 providing the first mechanical connection between handle 5 and cam 6 and movable relative to cam 6.
  • the rotation of the handle 5 according to the first direction of movement causes the contact of the pin 10 fixed to the handle 5 with the stop 11 of the cam 6 to form the first mechanical connection and causes the movement of cam 6 to a sliding position of rope 1.
  • the pin 16 is arranged at a distance from the axis of rotation 19a so as to force the rotation of the ramp 19.
  • the use of a mobile ramp 19 facilitates the escape of the first pin 10 with the first stop 11.
  • the force applied by the spring 9 is low compared to the friction provided by the rope 1 so that the additional force provided by the spring before losing the first mechanical bond is weak.
  • the operation of the descender is close to that of the prior art.
  • the additional force provided by the spring 9 makes it possible to define a hard point at the level of the handle 5 which makes it easier for the user to find the position of the handle. 5 just before the loss of the first mechanical connection.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
EP19164787.4A 2018-04-11 2019-03-24 Descendeur autobloquant a poignee debrayable Active EP3552668B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1853186A FR3080045B1 (fr) 2018-04-11 2018-04-11 Descendeur autobloquant a poignee debrayable

Publications (2)

Publication Number Publication Date
EP3552668A1 EP3552668A1 (fr) 2019-10-16
EP3552668B1 true EP3552668B1 (fr) 2022-04-06

Family

ID=62455738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19164787.4A Active EP3552668B1 (fr) 2018-04-11 2019-03-24 Descendeur autobloquant a poignee debrayable

Country Status (5)

Country Link
US (1) US11071879B2 (es)
EP (1) EP3552668B1 (es)
CN (1) CN210205628U (es)
ES (1) ES2915584T3 (es)
FR (1) FR3080045B1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2928081C (en) * 2015-04-24 2018-09-18 Buckingham Manufacturing Company, Inc. Cam assembly for use with pole climbing fall restriction device
US10987525B2 (en) * 2017-05-22 2021-04-27 Cmc Rescue, Inc. Descending apparatus and methods for use of same
USD947461S1 (en) * 2019-01-30 2022-03-29 Sayfa R&D Pty Ltd Vertical fall arrest safety device
CN113908456B (zh) * 2020-07-08 2022-10-11 浙江唯海科技有限公司 一种多模式偏心轮防恐慌下降器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688581B1 (fr) * 1994-06-23 1999-09-08 Zedel Descendeur débrayable à autoblocage de la corde
EP2018894B1 (fr) * 2007-07-26 2014-11-26 Zedel Descendeur autobloquant à poignée débrayable

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721523B1 (fr) * 1994-06-23 1996-08-14 Zedel Descendeur à verrouillage de la poulie pour le blocage permanent de la corde.
FR2898506B1 (fr) * 2006-03-15 2008-05-30 Zedel Soc Par Actions Simplifi Appareil multifonctionnel d'assurage pour corde
FR2950536B1 (fr) * 2009-09-25 2011-10-07 Zedel Dispositif d'assurance autobloquant pour corde
EP2554219B1 (en) * 2011-08-03 2023-11-29 Camp S.p.A. Assisted safety locking device equipped with anti-panic device
FR3000898B1 (fr) * 2013-01-16 2015-06-26 Zedel Appareil de securite sur corde a voyant indicateur de l'etat indicateur de l'etat de fermeture des flasques
US9623269B2 (en) * 2013-03-14 2017-04-18 Black Diamond Equipment, Ltd. Systems for assisted braking belay with a cam-clutch mechanism
GB2522179B (en) * 2013-11-14 2019-02-13 Int Safety Components Ltd Improvements in and relating to rope descenders
FR3015963B1 (fr) * 2013-12-27 2016-01-22 Zedel Dispositif de mouflage ameliore
FR3032354A1 (fr) * 2015-02-11 2016-08-12 Zedel Dispositif assureur descendeur sur corde a demultiplication et blocage anti-panique
CA2982124C (en) * 2015-04-07 2023-04-25 Harken, Incorporated High load descender with adaptive release linkage
FR3059559B1 (fr) * 2016-12-07 2022-06-10 Zedel Descendeur autobloquant
CN110072595B (zh) * 2016-12-16 2020-06-12 3M创新有限公司 具有制动系统的坠落保护设备
US10035028B1 (en) * 2017-01-04 2018-07-31 Mallory Safety+Supply Emergency descender device
FR3084264B1 (fr) * 2018-07-24 2020-09-18 Zedel Descendeur a poulie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0688581B1 (fr) * 1994-06-23 1999-09-08 Zedel Descendeur débrayable à autoblocage de la corde
EP2018894B1 (fr) * 2007-07-26 2014-11-26 Zedel Descendeur autobloquant à poignée débrayable

Also Published As

Publication number Publication date
US20190314651A1 (en) 2019-10-17
ES2915584T3 (es) 2022-06-23
FR3080045B1 (fr) 2020-05-15
EP3552668A1 (fr) 2019-10-16
CN210205628U (zh) 2020-03-31
FR3080045A1 (fr) 2019-10-18
BR102019007149A2 (pt) 2019-10-29
US11071879B2 (en) 2021-07-27

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