EP2412408A1 - Energy absorption device for the anchor of a life line or similar - Google Patents
Energy absorption device for the anchor of a life line or similar Download PDFInfo
- Publication number
- EP2412408A1 EP2412408A1 EP11171596A EP11171596A EP2412408A1 EP 2412408 A1 EP2412408 A1 EP 2412408A1 EP 11171596 A EP11171596 A EP 11171596A EP 11171596 A EP11171596 A EP 11171596A EP 2412408 A1 EP2412408 A1 EP 2412408A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy absorbing
- absorbing device
- cable
- friction ring
- cable portion
- 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.)
- Granted
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- 238000010521 absorption reaction Methods 0.000 title description 21
- 238000004873 anchoring Methods 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 230000035939 shock Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
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 anchoring a lifeline or the like.
- the device in question relates to the field of safety against falls of people involved at height, especially on roofs of buildings or other structures.
- a harness intended to be fixed to an anchor point, or to a life line via a carabiner.
- anchorage point which is fixed for example to a wall, a frame or a roof which ensures the restraint of the person during his fall.
- the lifeline can be constituted for example by a cable or straps. Life lines which are fixed at their ends on structures, transmit to the fastening zones on the structures efforts that can be very important. These efforts depend on different parameters, such as composition and length of the lifeline, spacing of intermediate and angle checkpoints, number of people connected simultaneously.
- the structure on which is fixed the life line does not always have sufficient strength to withstand significant effort, as is the case when a person falls. It is therefore appropriate, in such cases, that the anchoring device of the lifeline has an energy absorbing capacity, operating in the manner of a shock absorber.
- shock absorbers comprise damping means which involve the compression or traction of elastic components, in particular springs. Such dampers are most often disposable and deform even when low stresses are exerted on them.
- the document EP 2 095 847 discloses an energy absorbing device comprising a cylindrical housing provided with fixing means at a fixed point, a piston displaceable axially inside the cylindrical housing, a rod whose one end is integral with the piston and whose the other end protrudes outside the housing and is provided with connection means to a lifeline, and a damping element housed in the cylindrical housing and intended to be compressed by the piston.
- a traction force is exerted on the connection means, and thus on the rod, which causes the piston to move and compression of the damping element. This results in an absorption of part of the energy generated by the fall of the operator.
- This type of energy absorbing device uses the stroke of a piston inside a cylindrical housing to absorb shocks.
- a piston inside a cylindrical housing to absorb shocks.
- the present invention aims to remedy these disadvantages.
- the technical problem underlying the invention therefore consists in providing an energy absorption device which is of simple structure, economical and compact, which does not deform below a certain threshold of constraints, and which be safe to use.
- connection means which causes a displacement. relative to the first cable portion with respect to the friction ring, and more particularly a sliding of the first portion of cable inside the latter.
- the friction generated by such displacement of the first cable portion absorbs at least part of the energy due to impact.
- connection means Under normal conditions of use, the operator connected to the lifeline exerts a low tensile force on the connection means, which prevents any relative movement between the first cable portion and the friction ring.
- the energy absorbing device according to the invention does not deform below a certain stress threshold, which prevents inadvertent tripping of the energy absorbing device.
- the energy absorption device comprises a second cable portion having a first end connected to the fixing means and a second end connected to the connection means.
- the first and second cable portions and the connection means are formed by the same cable.
- the first cable portion has a free end opposite to the connection means and comprises an end stop intended to cooperate with the friction ring.
- the abutment means comprise an abutment ring having a through opening through which the first portion of cable extends.
- the energy absorption device comprises two plates spaced from each other and each having at least a first portion disposed inside the housing and a second portion protruding outside the housing, the abutment means being secured to the first portions of said plates, and the second portions of said plates forming at least partly the fixing means.
- the fastening means further comprise a fastening key intended to be engaged and locked in eyelets formed in the second portions of said plates.
- the fixing means are mounted movable relative to the housing between a first position, said retracted, wherein the fastening means are located near the housing and a second position, said outlet, wherein the fastening means are remote from the casing, the fixing means being arranged to be moved in the second position when a tensile force greater than a predetermined value is exerted on the connecting means, and the energy absorbing device comprises at least one visual indicator of biasing, advantageously brightly colored, arranged to be visible from outside the housing when the fastening means are in the second position.
- the first end of the second cable portion is connected to the fastening means by means of a yoke pivotally mounted on the fastening means.
- the friction ring is crimped to the first cable portion.
- the energy absorbing device 2 comprises a casing 4 advantageously consisting of two half-shells made for example of synthetic material.
- the energy absorbing device 2 further comprises a first portion of cable 5 wound inside the casing 4.
- the first cable portion 5 has a first end 6 secured to connection means 7 protruding outside of the housing and intended to be connected to a lifeline, and a second free end 8, opposite to the connection means 7, provided with a limit stop 9.
- the energy absorbing device 2 also comprises a friction ring 10 mounted by crimping on the first cable portion 5 so as to exert a clamping force on the latter.
- the strength of clamping exerted by the friction ring 10 on the first cable portion 5 is predetermined so as to allow relative movement of the first cable portion 5 with respect to the friction ring 10 when a pulling force greater than a predetermined value is exerted on the connecting means 7.
- the predetermined value is for example equal to about 4.5 kN.
- the energy absorbing device 2 further comprises an abutment ring 11 having a through opening 12 through which extends the first cable portion 5.
- the abutment ring 11 is disposed in the housing 4 along a portion of the first cable portion 5 extending between the connecting means 7 and the friction ring 10. As shown in FIG. figure 5b , the end of the friction ring 10 turned on the side of the connecting means 7 bears against the abutment ring 11, and more particularly against a shoulder surrounding the through opening 12.
- the abutment ring 11 advantageously extends substantially perpendicular to the friction ring 10.
- the energy absorbing device 2 comprises two rigid plates 13, preferably metallic, substantially identical and parallel.
- the two plates 13 are spaced from each other and each have a mounting portion 13a disposed inside the casing 4 and a fixing portion 13b protruding outside the casing 4.
- the mounting portions 13a each comprise an eyelet 14 for crimping the end portions of the stop ring 11.
- the fixing portions 13b each comprise an eyelet 15 in which is intended to be engaged and locked a fastening key 16 so as to allow attachment of the housing 4 on a fixed point.
- the energy absorbing device 2 further comprises a second cable portion 17 having a first end 18 connected to the plates 13 by means of a yoke 19 pivotally mounted around the securing key 16, and a second end Connected to the connection means 7.
- the second cable portion 17 comprises a first part extending inside the casing 4 and a second part extending outside the casing 4, the second part protruding from the casing 4. outside the housing through an opening 21 delimited by the latter.
- the first and second cable portions 5, 17 may each be made from a single-strand or multi-strand cable made for example of stainless steel.
- the first and second cable portions 5, 17 and the connecting means 7 are advantageously formed by the same cable folded on itself so as to form a connecting loop 7 forming the connecting means, and two cable portions forming the first and second cable portions 5, 17.
- the figure 8 represents a lifeline 22 equipped with the energy absorbing device 2.
- the lifeline 22 comprises a cable 23, one end of which is connected to the connection means 7 of the energy absorbing device 2 by the intermediate of a tensioner, and whose other end is fixed to a fixed point 24. It should be noted that the fixing portions 13b and the securing key 16 ensure the attachment of the energy absorbing device 2 to a fixed point 25.
- the plates 13 are mounted movable relative to the casing 4 between a first, so-called retracted position, in which the fixing portions 13b are located near the casing (see FIG. figure 10 ) and a second position, said outlet, in which the fixing portions 13b are remote from the housing (see figure 11 ), the plates 13 being arranged to be displaced in the second position when a tensile force greater than a predetermined value is exerted on the connecting means 7.
- the energy absorbing device 2 comprises at least one visual biasing indicator 27, advantageously brightly colored, formed on one of the plates 13 and arranged to be visible from outside the housing 4 when the fastening portions 13b are in the second position.
- the invention is not limited to the sole embodiment of this energy absorption device, described above as an example, it encompasses all the variants of embodiment. .
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Vibration Dampers (AREA)
- Emergency Lowering Means (AREA)
Abstract
Description
La présente invention concerne un dispositif d'absorption d'énergie pour l'ancrage d'une ligne de vie ou similaire.The present invention relates to an energy absorbing device for anchoring a lifeline or the like.
Le dispositif dont il s'agit concerne le domaine de la sécurité contre les chutes de personnes intervenant en hauteur, notamment sur des toits de bâtiments ou autres ouvrages.The device in question relates to the field of safety against falls of people involved at height, especially on roofs of buildings or other structures.
Pour assurer la sécurité d'une personne, celle-ci est équipée d'un harnais, destiné à être fixé à un point d'ancrage, ou à une ligne de vie par l'intermédiaire d'un mousqueton. En cas de chute, c'est le point d'ancrage qui est fixé par exemple à un mur, une charpente ou une toiture qui assure la retenue de la personne au cours de sa chute. La ligne de vie peut être constituée par exemple par un câble ou par des sangles. Les lignes de vie qui sont fixées à leurs extrémités sur des structures, transmettent aux zones de fixation sur les structures des efforts qui peuvent être très importants. Ces efforts dépendent de différents paramètres, tels que composition et longueur de la ligne de vie, espacement des points de reprise intermédiaire et d'angle, nombre de personnes connectées simultanément.To ensure the safety of a person, it is equipped with a harness, intended to be fixed to an anchor point, or to a life line via a carabiner. In the event of a fall, it is the anchorage point which is fixed for example to a wall, a frame or a roof which ensures the restraint of the person during his fall. The lifeline can be constituted for example by a cable or straps. Life lines which are fixed at their ends on structures, transmit to the fastening zones on the structures efforts that can be very important. These efforts depend on different parameters, such as composition and length of the lifeline, spacing of intermediate and angle checkpoints, number of people connected simultaneously.
Or, la structure sur laquelle est fixée la ligne de vie ne présente pas toujours une résistance suffisante pour encaisser des efforts importants, comme tel est le cas lors de la chute d'une personne. Il convient donc, dans de tels cas, que le dispositif d'ancrage de la ligne de vie dispose d'une capacité d'absorption d'énergie, fonctionnant à la façon d'un amortisseur de choc.However, the structure on which is fixed the life line does not always have sufficient strength to withstand significant effort, as is the case when a person falls. It is therefore appropriate, in such cases, that the anchoring device of the lifeline has an energy absorbing capacity, operating in the manner of a shock absorber.
Certains amortisseurs de chocs connus comportent des moyens d'amortissement qui font appel à la compression ou à la traction de composants élastiques, notamment de ressorts. De tels amortisseurs sont le plus souvent à usage unique et se déforment y compris lorsque de faibles contraintes sont exercées sur ces derniers.Some known shock absorbers comprise damping means which involve the compression or traction of elastic components, in particular springs. Such dampers are most often disposable and deform even when low stresses are exerted on them.
Le document
Ce type de dispositif d'absorption d'énergie utilise la course d'un piston à l'intérieur d'un logement cylindrique pour absorber les chocs. Ainsi, afin d'obtenir une absorption d'énergie satisfaisante, il est nécessaire de prévoir un dispositif encombrant pour assurer une course satisfaisante d'un tel piston.This type of energy absorbing device uses the stroke of a piston inside a cylindrical housing to absorb shocks. Thus, in order to obtain a satisfactory energy absorption, it is necessary to provide a bulky device to ensure a satisfactory race of such a piston.
La présente invention vise à remédier à ces inconvénients.The present invention aims to remedy these disadvantages.
Le problème technique à la base de l'invention consiste donc à fournir un dispositif d'absorption d'énergie qui soit de structure simple, économique et peu encombrante, qui ne se déforme pas en dessous d'un certain seuil de contraintes, et qui soit sûr d'utilisation.The technical problem underlying the invention therefore consists in providing an energy absorption device which is of simple structure, economical and compact, which does not deform below a certain threshold of constraints, and which be safe to use.
A cet effet, la présente invention concerne un dispositif d'absorption d'énergie pour l'ancrage d'une ligne de vie ou similaire, caractérisé en ce qu'il comprend :
- un carter,
- des moyens de fixation agencés pour fixer le carter sur un point fixe,
- une première portion de câble enroulée à l'intérieur du carter,
- des moyens de raccordement solidaires de la première portion de câble et destinés à être raccordés à une ligne de vie,
- une bague de friction montée sur la première portion de câble de manière à exercer une force de serrage sur cette dernière, et
- des moyens de butée disposés dans le carter le long d'une partie de la première portion de câble s'étendant entre les moyens de raccordement et la bague de friction, et contre lesquels est destinée à prendre appui la bague de friction,
- a housing,
- fastening means arranged to fix the casing on a fixed point,
- a first portion of cable wound inside the housing,
- connection means secured to the first portion of cable and intended to be connected to a lifeline,
- a friction ring mounted on the first portion of cable so as to exert a clamping force on the latter, and
- stop means disposed in the housing along a portion of the first cable portion extending between the connecting means and the friction ring, and against which is intended to bear the friction ring,
En cas d'une chute d'un opérateur raccordé à une ligne de vie équipée d'un dispositif d'absorption d'énergie selon l'invention, une force de traction importante est exercée sur les moyens de raccordement, ce qui provoque un déplacement relatif de la première portion de câble par rapport à la bague de friction, et plus particulièrement un coulissement de la première portion de câble à l'intérieur de cette dernière. Le frottement engendré par un tel déplacement de la première portion de câble absorbe au moins en partie l'énergie due au choc.In the event of a fall of an operator connected to a lifeline equipped with a device for absorbing energy according to the invention, a significant traction force is exerted on the connection means, which causes a displacement. relative to the first cable portion with respect to the friction ring, and more particularly a sliding of the first portion of cable inside the latter. The friction generated by such displacement of the first cable portion absorbs at least part of the energy due to impact.
En conditions normales d'utilisation, l'opérateur raccordé à la ligne de vie exerce une faible force de traction sur les moyens de raccordement, ce qui empêche tout mouvement relatif entre la première portion de câble et la bague de friction.Under normal conditions of use, the operator connected to the lifeline exerts a low tensile force on the connection means, which prevents any relative movement between the first cable portion and the friction ring.
Ainsi, le dispositif d'absorption d'énergie selon l'invention ne se déforme donc pas en dessous d'un certain seuil de contraintes, ce qui évite tout déclenchement intempestif du dispositif d'absorption d'énergie.Thus, the energy absorbing device according to the invention does not deform below a certain stress threshold, which prevents inadvertent tripping of the energy absorbing device.
De plus, l'utilisation d'une portion de câble enroulée à l'intérieur d'un carter en vue d'absorber l'énergie d'un choc permet d'obtenir une course d'absorption importante, tout en conservant un dispositif peu encombrant.In addition, the use of a portion of cable wound inside a housing to absorb the energy of a shock provides a significant absorption stroke, while retaining a little device. cumbersome.
En outre, l'obtention d'une course d'absorption importante permet d'améliorer la sécurité d'utilisation du dispositif d'absorption d'énergie selon l'invention.In addition, obtaining a significant absorption stroke improves the safety of use of the energy absorbing device according to the invention.
Avantageusement, le dispositif d'absorption d'énergie comprend une deuxième portion de câble comportant une première extrémité reliée aux moyens de fixation et une deuxième extrémité reliée aux moyens de raccordement. Ces dispositions permettent d'assurer une retenue d'un opérateur en cas de rupture de la première portion de câble, et donc d'améliorer encore la sécurité d'utilisation du dispositif d'absorption d'énergie.Advantageously, the energy absorption device comprises a second cable portion having a first end connected to the fixing means and a second end connected to the connection means. These arrangements make it possible to ensure retention of an operator in the event of breakage of the first portion of cable, and thus to further improve the safety of use of the energy absorption device.
De préférence, les première et seconde portions de câble et les moyens de raccordement sont formés par un même câble.Preferably, the first and second cable portions and the connection means are formed by the same cable.
De façon avantageuse, la première portion de câble comporte une extrémité libre opposée aux moyens de raccordement et comprenant une butée de fin de course destinée à coopérer avec la bague de friction.Advantageously, the first cable portion has a free end opposite to the connection means and comprises an end stop intended to cooperate with the friction ring.
De façon préférentielle, les moyens de butée comportent une bague de butée présentant une ouverture traversante à travers laquelle s'étend la première portion de câble.Preferably, the abutment means comprise an abutment ring having a through opening through which the first portion of cable extends.
Selon un mode de réalisation de l'invention, le dispositif d'absorption d'énergie comprend deux plaques espacées l'une de l'autre et présentant chacune au moins une première portion disposée à l'intérieur du carter et une deuxième portion faisant saillie à l'extérieur du carter, les moyens de butée étant solidaires des premières portions desdites plaques, et les deuxièmes portions desdites plaques formant au moins en partie les moyens de fixation.According to one embodiment of the invention, the energy absorption device comprises two plates spaced from each other and each having at least a first portion disposed inside the housing and a second portion protruding outside the housing, the abutment means being secured to the first portions of said plates, and the second portions of said plates forming at least partly the fixing means.
De préférence, les moyens de fixation comportent en outre une clavette de fixation destinée à être engagée et verrouillée dans des oeillets ménagés dans les deuxièmes portions desdites plaques.Preferably, the fastening means further comprise a fastening key intended to be engaged and locked in eyelets formed in the second portions of said plates.
Avantageusement, les moyens de fixation sont montés mobiles par rapport au carter entre une première position, dite rentrée, dans laquelle les moyens de fixation sont situés à proximité du carter et une seconde position, dite sortie, dans laquelle les moyens de fixation sont éloignés du carter, les moyens de fixation étant agencés pour être déplacés dans la seconde position lorsqu'une force de traction supérieure à une valeur prédéterminée est exercée sur les moyens de raccordement, et le dispositif d'absorption d'énergie comporte au moins un témoin visuel de sollicitation, avantageusement de couleur vive, agencé pour être visible depuis l'extérieur du carter lorsque les moyens de fixation sont dans la seconde position. Ces dispositions permettent de visualiser de manière sûre et indiscutable toute sollicitation du dispositif selon l'invention.Advantageously, the fixing means are mounted movable relative to the housing between a first position, said retracted, wherein the fastening means are located near the housing and a second position, said outlet, wherein the fastening means are remote from the casing, the fixing means being arranged to be moved in the second position when a tensile force greater than a predetermined value is exerted on the connecting means, and the energy absorbing device comprises at least one visual indicator of biasing, advantageously brightly colored, arranged to be visible from outside the housing when the fastening means are in the second position. These arrangements make it possible to display in a safe and indisputable manner any solicitation of the device according to the invention.
Selon un mode de réalisation de l'invention, la première extrémité de la deuxième portion de câble est reliée aux moyens de fixation par l'intermédiaire d'une chape montée pivotante sur les moyens de fixation.According to one embodiment of the invention, the first end of the second cable portion is connected to the fastening means by means of a yoke pivotally mounted on the fastening means.
De préférence, la bague de friction est montée par sertissage sur la première portion de câble.Preferably, the friction ring is crimped to the first cable portion.
De toute façon l'invention sera bien comprise à l'aide de la description qui suit en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution de ce dispositif d'absorption d'énergie.
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Figure 1 est une vue en perspective d'un dispositif d'absorption d'énergie selon l'invention. -
Figure 2 est une vue en perspective du dispositif d'absorption d'énergie de lafigure 1 après sollicitation des moyens de raccordement. -
Figure 3 est une vue éclatée du dispositif d'absorption d'énergie de lafigure 1 . -
Figure 4a est une vue partielle en perspective du dispositif d'absorption d'énergie de lafigure 1 . -
Figure 4b est une vue à l'échelle agrandie d'un détail de lafigure 4a . -
Figure 5a est une vue en coupe selon la ligne V-V de lafigure 4a . -
Figure 5b est une vue à l'échelle agrandie d'un détail de lafigure 5a . -
Figure 6 et 7 sont des vues partielles du dispositif d'absorption d'énergie de lafigure 1 montrant ce dernier dans deux positions différentes de sollicitation. -
Figure 8 est une vue de côté d'une ligne de vie équipée d'un dispositif d'absorption d'énergie selon lafigure 1 , en conditions normales d'utilisation. -
Figure 9 est une vue de côté d'une ligne de vie équipée d'un dispositif d'absorption d'énergie selon lafigure 1 , après une chute d'un opérateur raccordé à la ligne de vie. -
Figures 10 et 11 sont des vues de côté d'un dispositif d'absorption d'énergie selon une variante de réalisation de l'invention montrant respectivement ce dernier avant et après sollicitation des moyens de raccordement. - Les
figures 1 à 7 représentent un dispositif d'absorption d'énergie 2 pour l'ancrage d'une ligne de vie.
-
Figure 1 is a perspective view of an energy absorbing device according to the invention. -
Figure 2 is a perspective view of the energy absorbing device of thefigure 1 after solicitation of the connection means. -
Figure 3 is an exploded view of the energy absorbing device of thefigure 1 . -
Figure 4a is a partial perspective view of the energy absorption device of thefigure 1 . -
Figure 4b is an enlarged view of a detail of thefigure 4a . -
Figure 5a is a sectional view along line VV of thefigure 4a . -
Figure 5b is an enlarged view of a detail of thefigure 5a . -
Figure 6 and 7 are partial views of the energy absorbing device of thefigure 1 showing the latter in two different positions of solicitation. -
Figure 8 is a side view of a lifeline equipped with an energy absorbing device according to thefigure 1 , under normal conditions of use. -
Figure 9 is a side view of a lifeline equipped with an energy absorbing device according to thefigure 1 , after a fall of an operator connected to the lifeline. -
Figures 10 and 11 are side views of a power absorbing device according to an alternative embodiment of the invention respectively showing the latter before and after solicitation of the connection means. - The
Figures 1 to 7 represent a device for absorbingenergy 2 for anchoring a lifeline.
Le dispositif d'absorption d'énergie 2 comprend un carter 4 constitué avantageusement de deux demi-coquilles réalisées par exemple en matière synthétique.The
Le dispositif d'absorption d'énergie 2 comprend en outre une première portion de câble 5 enroulée à l'intérieur du carter 4. La première portion de câble 5 comporte une première extrémité 6 solidaire de moyens de raccordement 7 faisant saillie à l'extérieur du carter et destinés à être raccordés à une ligne de vie, et une deuxième extrémité libre 8, opposée aux moyens de raccordement 7, munie d'une butée de fin de course 9.The
Le dispositif d'absorption d'énergie 2 comprend également une bague de friction 10 montée par sertissage sur la première portion de câble 5 de manière à exercer une force de serrage sur cette dernière. La force de serrage exercée par la bague de friction 10 sur la première portion de câble 5 est prédéterminée de manière à autoriser un déplacement relatif de la première portion de câble 5 par rapport à la bague de friction 10 lorsqu'une force de traction supérieure à une valeur prédéterminée est exercée sur les moyens de raccordement 7. La valeur prédéterminée est par exemple égale à environ 4,5 kN.The
Le dispositif d'absorption d'énergie 2 comprend de plus une bague de butée 11 présentant une ouverture traversante 12 à travers laquelle s'étend la première portion de câble 5. La bague de butée 11 est disposée dans le carter 4 le long d'une partie de la première portion de câble 5 s'étendant entre les moyens de raccordement 7 et la bague de friction 10. Comme montré sur la
Le dispositif d'absorption d'énergie 2 comprend deux plaques rigides 13, de préférence métalliques, sensiblement identiques et parallèles. Les deux plaques 13 sont espacées l'une de l'autre et présentent chacune une portion de montage 13a disposée à l'intérieur du carter 4 et une portion de fixation 13b faisant saillie à l'extérieur du carter 4.The
Comme montré sur la
Le dispositif d'absorption d'énergie 2 comprend en outre une deuxième portion de câble 17 comportant une première extrémité 18 reliée aux plaques 13 par l'intermédiaire d'une chape 19 montée pivotante autour de la clavette de fixation 16, et une deuxième extrémité 20 reliée aux moyens de raccordement 7. La deuxième portion de câble 17 comprend une première partie s'étendant à l'intérieur du carter 4 et une deuxième partie s'étendant à l'extérieur du carter 4, la deuxième partie faisant saillie à l'extérieur du carter par l'intermédiaire d'une ouverture 21 délimitée par ce dernier.The
Les première et seconde portions de câble 5, 17 peuvent chacune être réalisées à partir d'un câble monobrin ou multibrins réalisé par exemple en acier inoxydable.The first and
Les première et seconde portions de câble 5, 17 et les moyens de raccordement 7 sont avantageusement formés par un même câble replié sur lui-même de manière à former une boucle de raccordement 7 formant les moyens de raccordement, et deux portions de câble formant les première et seconde portions de câble 5, 17.The first and
La
En conditions normales d'usage, un opérateur 26 raccordé à la ligne de vie 22 exerce une faible traction sur le câble 23 de la ligne de vie 22. Par conséquent, la force de traction exercée sur les moyens de raccordement 7 est faible par rapport à la force de serrage exercée par la bague de friction 10 sur la première portion de câble 5, et ne permet pas un déplacement relatif entre la première portion de câble 5 et la bague de friction 10. Ceci permet d'éviter tout déclenchement intempestif du dispositif d'absorption d'énergie 2.Under normal conditions of use, an
Lors d'une chute accidentelle de l'opérateur 26 raccordé à la ligne de vie (voir la
Durant ce déplacement de la première portion de câble 5, la paroi extérieure de cette dernière se déplace en frottant sur la paroi intérieure de la bague de friction 10, ce qui produit une absorption d'énergie et permet donc d'absorber au moins en partie l'énergie engendrée par la chute de l'opérateur.During this movement of the
Il doit être noté que le déplacement de la première portion de câble 5 est susceptible de se poursuivre jusqu'à ce que la butée de fin de course 9 montée au niveau la deuxième extrémité 8 de la première portion de câble 5 vienne en butée contre la bague de friction 10 (voir la
Il ressort notamment de la
Selon une variante de réalisation de l'invention montrée sur les
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce dispositif d'absorption d'énergie, décrite ci-dessus à titre d'exemple, elle en embrasse au contraire toutes les variantes de réalisation.As goes without saying, the invention is not limited to the sole embodiment of this energy absorption device, described above as an example, it encompasses all the variants of embodiment. .
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1056242A FR2963245B1 (en) | 2010-07-29 | 2010-07-29 | ENERGY ABSORPTION DEVICE FOR ANCHORING A LIFE LINE OR THE LIKE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2412408A1 true EP2412408A1 (en) | 2012-02-01 |
EP2412408B1 EP2412408B1 (en) | 2019-03-27 |
Family
ID=43661924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11171596.7A Active EP2412408B1 (en) | 2010-07-29 | 2011-06-27 | Energy absorption device for the anchor of a life line or similar |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120024640A1 (en) |
EP (1) | EP2412408B1 (en) |
ES (1) | ES2731597T3 (en) |
FR (1) | FR2963245B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9513803B2 (en) * | 2012-12-21 | 2016-12-06 | Intel Corporation | Tagging in a storage device |
US10512802B2 (en) * | 2017-10-20 | 2019-12-24 | Werner Co. | Energy absorber cover and horizontal lifeline system including the same |
EP3895138A4 (en) | 2019-01-14 | 2022-01-19 | MSA Technology, LLC | Fall protection compliance system and method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006103259A1 (en) * | 2005-04-01 | 2006-10-05 | Capital Safety Group Emea | Energy-absorbing device |
FR2886165A1 (en) * | 2005-05-24 | 2006-12-01 | Capital Safety Group Emea Sa | METHOD FOR MOUNTING A SAFETY LINE CABLE ON A TENDER |
EP2095847A1 (en) | 2008-02-26 | 2009-09-02 | SKYLOTEC GmbH | Fall damper |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US297843A (en) * | 1884-04-29 | Chaeles inglis pittman | ||
CA872446A (en) * | 1966-04-15 | 1971-06-01 | Slater Steel Industries Limited | Vibration dampers |
US3949832A (en) * | 1974-12-04 | 1976-04-13 | Hunter Cloyce R | Portable fire escape |
DE20102758U1 (en) * | 2001-02-16 | 2001-06-28 | TRW Occupant Restraint Systems GmbH & Co. KG, 73553 Alfdorf | Belt tensioners |
US7237650B2 (en) * | 2004-05-19 | 2007-07-03 | D B Industries, Inc. | Tension device for use with a self-retracting lifeline |
GB0615723D0 (en) * | 2006-08-08 | 2006-09-20 | Wellstream Int Ltd | Apparatus and method for controlling motion of a ben stiffener |
-
2010
- 2010-07-29 FR FR1056242A patent/FR2963245B1/en not_active Expired - Fee Related
-
2011
- 2011-06-27 EP EP11171596.7A patent/EP2412408B1/en active Active
- 2011-06-27 ES ES11171596T patent/ES2731597T3/en active Active
- 2011-07-25 US US13/189,618 patent/US20120024640A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006103259A1 (en) * | 2005-04-01 | 2006-10-05 | Capital Safety Group Emea | Energy-absorbing device |
FR2886165A1 (en) * | 2005-05-24 | 2006-12-01 | Capital Safety Group Emea Sa | METHOD FOR MOUNTING A SAFETY LINE CABLE ON A TENDER |
EP2095847A1 (en) | 2008-02-26 | 2009-09-02 | SKYLOTEC GmbH | Fall damper |
Also Published As
Publication number | Publication date |
---|---|
EP2412408B1 (en) | 2019-03-27 |
FR2963245A1 (en) | 2012-02-03 |
FR2963245B1 (en) | 2012-08-10 |
ES2731597T3 (en) | 2019-11-18 |
US20120024640A1 (en) | 2012-02-02 |
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