EP2192959A1 - Follow-up fall prevention device - Google Patents

Follow-up fall prevention device

Info

Publication number
EP2192959A1
EP2192959A1 EP07848287A EP07848287A EP2192959A1 EP 2192959 A1 EP2192959 A1 EP 2192959A1 EP 07848287 A EP07848287 A EP 07848287A EP 07848287 A EP07848287 A EP 07848287A EP 2192959 A1 EP2192959 A1 EP 2192959A1
Authority
EP
European Patent Office
Prior art keywords
rope
free weight
bearing surface
free
locking system
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
Application number
EP07848287A
Other languages
German (de)
French (fr)
Other versions
EP2192959B1 (en
Inventor
Olivier Miceli
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.)
Eurl Miceli Design
Original Assignee
Eurl Miceli Design
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 Eurl Miceli Design filed Critical Eurl Miceli Design
Publication of EP2192959A1 publication Critical patent/EP2192959A1/en
Application granted granted Critical
Publication of EP2192959B1 publication Critical patent/EP2192959B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the present invention relates to a follower fall arrest device used with a safety rope intended to secure the worker at height, climber, and the like, comprising:
  • a body equipped with a locking system occupying either an active position for blocking the rope during the rapid circulation of said rope in the device generated for example by a fall, or an inactive position allowing the controlled circulation of the rope in the device corresponding to the progression of a person in the direction of the climb, or in the opposite direction during a controlled descent
  • Such a device is for example known from the patents FR2842113, US4923037 and DE 102004019714Al.
  • the locking systems of known fall arrest devices have many disadvantages:
  • the purpose of this invention is to remove all these disadvantages.
  • the device according to this invention is provided with a locking system comprising:
  • the free weight being fit during a fast flow the rope to move towards the inclined bearing surface until the rope is locked between said free weight and the bearing surface of the rope.
  • the device is characterized in that the locking system is provided with a pressure member allowing, during a controlled circulation of the rope, the free weight to always be in contact with the rope and to remain in said part. bottom of the cavity without touching the inclined support surface, whatever the inclination of the rope and whatever the position of the device.
  • the pressure member presses on an axis allowing rotation of the free flyweight on itself and that said axis is free to rotate relative to the free flyweight the latter being a ring.
  • the free weight may comprise an off-center mass
  • the locking system may comprise a running gear located between said free weight and the inclined bearing surface, said weight comprising at least one surface capable of receiving the said running gear.
  • Said free weight has a smooth surface condition so as not to damage the rope.
  • the adhesion of the rope to the free weight is greater than the adhesion of the other contact zones on said free weight.
  • the locking system is provided with a lever for unlocking said free weight when the free weight is locked against the rope and even when this last is under load which allows the braking of the said rope during the descent of the user for example.
  • the device is further characterized in that the locking system is provided with a manually activated thrust member allowing the free weight to be in contact with the rope and with the inclined bearing surface, which allows only the circulation the rope in one direction and the blockage in the other direction.
  • the result of this invention is a safety device, fall arrest follower, blocker and descender.
  • This new device therefore offers the possibility of rope ascending, controlled climb and descent along the fixed rope, a descending function when the user is suspended from the device after a fall or during abseiling and it is also used to secure another person, the device is then attached to a person on the ground who performs the belay accompanying the movement in the device of the mobile rope connected to the other person, allowing the progression of the climber or worker safely.
  • FIG. 1 is a perspective view of the device installed on a rope (1) security
  • FIG. 2 is a perspective view showing the other side of the device
  • FIG. 3 is a sectional view showing the device in "fall arrest" mode
  • FIG. 4 is a sectional view showing the device in "blocker" mode
  • FIG. 5 is a sectional view showing the device in "descending" mode.
  • FIG. 6 is a sectional view showing another embodiment of the pressure member (8).
  • Figures 1 and 2 show an embodiment of the device according to the invention, it is shown in perspective in the use position installed on a rope (1) safety, and a carabiner attachment (12) generally connects the device to the user's shoulder belt, the latter not being represented.
  • the device according to this invention can be used to secure another person with a mobile safety rope, the device will be attached to the person on the ground and installed on a rope (1) mobile connecting the climber, so during a belay "Roping machine", the movable safety rope generally slides in a ring fixed at the top of the wall, or when a climber climbs "in the lead", then it connects the movable safety rope to rings fixed in the wall via carabiners, as it progresses.
  • the device can also be used as a fall arrester follower, the device is then attached to the user and installed on a fixed safety rope attached to the top of the wall, the self device thus ensures the user moving along the said fixed safety rope.
  • the device is in "blocker” mode, it therefore only authorizes the circulation of the rope (1) in a direction corresponding to a displacement of the user uphill and cause a blocking of the rope (1) in the opposite direction during the descent for example.
  • This lever (18) allows the user during the climbing of a cliff for example with the device in "fall arrest” mode, to switch to "blocker” mode to be held by the rope (1) for for example, to cross a passage that is too difficult, then return to the "fall arrest” mode to continue climbing uphill or downhill.
  • the unlocking lever (10) folded inside the body (2). All the parts that make up the device are preferably made of metal, stamped or injected aluminum type.
  • the pressure member (8) is articulated in rotation about the axis (22) and applies a pressure on the free weight (7) by the effect of a tension spring (24).
  • This traction spring (24) largely compensates for the weight of the free weight (7).
  • the pressure member (8) thus allows the free weight (7) to always be in contact with the rope (1) and to remain in said lower part of the cavity (5) without touching the inclined support surface (6), whatever the inclination of the rope (1) and whatever the position of the device.
  • the skidding of the free weight (7) on the low bearing surface (21) and on the pressure member (8) is understood because on the one hand the adhesion of the rope (1) to the free weight ( 7) is more important than the adhesion of the contact zones of the pressure member (8) and the low bearing surface (21), due to the size of the contact surfaces and the nature of the materials, and on the other hand the direction of the pressure of the pressure member (8) on the free weight (7) being towards the rope (l) and towards the low bearing surface (21), therefore the opposite of the inclined bearing surface (6).
  • the device in "fall arrest follower" mode will cause an acceleration of the movement of the rope (1) in the device, thus the acceleration in rotation of the free flyweight (7) which generates an increase in friction on the pressure member (8), thereby causing the free flyweight (7) to move towards the top of the cavity (5) by pushing back the pressure member (8) then said free weight (7) will roll on the inclined bearing surface (6) until the locking of the rope (1) between said free weight (7) and the bearing surface (4).
  • the pressure member (8) gives a high reliability to the device even if it is used with different diameters of rope.
  • FIG. 4 is a partial section of the device in "blocker" mode.
  • the push member (9) integral with the lever (18) is shown in the active position, the user is free to move uphill and the device will cause the locking of the rope (1) in the direction of descent.
  • the thrust member (9) being integral with the lever (18) (shown in dashed lines in FIG.
  • FIG. 5 is a partial section of the device in "descending" mode, that is to say, when the user is suspended from the rope (1) thanks to the blocking of the device, either after a fall or during abseiling.
  • the free weight (7) in the locked position the carabiner attachment (12) partially shown with an arrow indicating the direction of the forces on the device, and we see that the rope (1) is wrapped around the part of friction (26) of the device.
  • the fastening hole (28) in the body (2) of the device being above the locking system when the device is in use position for a rise ( Figures 1, 2, 3 and 4), it causes the device to tilt at the rounded end (27) of the friction portion (26) during the locking of the rope (1).
  • the rope (1) is wrapped around the friction portion (26), which increases the friction, facilitates the control of the abseiling and uses less the ropes.
  • the lever (10) folded, and dotted we see the lever (10) unlocking the free weight (7) thus causing the sliding of the rope (1) so the descent of the user.
  • Figures 3,4,5 were explained when the device is used as fall arrest, but it works the same way when it is used for the belaying of another person, in this case the device is fixed and the rope (1) is mobile.
  • FIG. 6 is a sectional view showing another embodiment of the pressure member (8), the other parts are not shown for clarity.
  • the pressure member (8) this time articulated at the point (30), pressing on either side of the free weight (7) on the axis (29) by the effort a traction spring (31) thus allowing the free weight (7) to always be in contact with the rope (1) .
  • said shaft (29) is free to rotate with respect to the free flyweight (7) the latter being a ring having a central hole about three times larger than the diameter of the axis (29) .
  • the pressure member (8) has a shape to maintain the axis ( 29) in a defined position and that said shape is extended by an inclined portion (32) the latter to maintain the axis (29) down which allows the free weight (7) not to touch the inclined support surface (6) during the controlled circulation of the rope (1).
  • This embodiment of the pressure member (8) makes the device more reliable because the fact that the pressure member (8) bears on the axis (29) reduces the friction on the pressure member ( 8) and can therefore increase the force of the spring (31) which allows excellent contact of the free weight (7) on the rope (1).
  • the free weight (7) is a ring gear increases the contact sensitivity between the said weight and the rope (1), which makes it possible to accentuate the inclined portion (32) of the said reliable pressure member the controlled circulation of the rope (1) and avoiding the inadvertent blocking of the rope.
  • the flyweight free (7) may include an off-center mass to optimize the device as explained above.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

Disclosed is a follow-up fall prevention device used with a cord designed to secure a person. The device includes a blocking system having a pressure mechanism configured, during running of the cord, to be between the free weight and the bearing surface and to bias a free weight toward the cord and away from a bearing surface, thereby enabling the free weight to be always in contact with the cord and remain in the lower part of a cavity without touching the bearing surface, whatever the inclination of the cord and whatever the position of the device. The pressure mechanism includes a spring.

Description

Dispositif antichute suiveur. Fall arrest device.
La présente invention concerne un dispositif antichute suiveur utilisé avec une corde de sécurité destiné à sécuriser le travailleur en hauteur, grimpeur, et autres, comportant :The present invention relates to a follower fall arrest device used with a safety rope intended to secure the worker at height, climber, and the like, comprising:
- un corps équipé d'un système de blocage occupant soit une position active de blocage de la corde lors de la circulation rapide de ladite corde dans le dispositif engendrée par exemple par une chute, soit une position inactive autorisant la circulation contrôlée de la corde dans le dispositif correspondant à la progression d'une personne dans le sens de la montée, ou dans le sens opposé lors d'une descente contrôléea body equipped with a locking system occupying either an active position for blocking the rope during the rapid circulation of said rope in the device generated for example by a fall, or an inactive position allowing the controlled circulation of the rope in the device corresponding to the progression of a person in the direction of the climb, or in the opposite direction during a controlled descent
- des moyens d'attaches pour la liaison du corps du dispositif à un baudrier d'assurance.- Fastening means for connecting the body of the device to an insurance belt.
Un tel dispositif est par exemple connu des brevets FR2842113, US4923037 et DE 102004019714Al. Les systèmes de blocage des dispositifs antichute connus présentent de multiples inconvénients :Such a device is for example known from the patents FR2842113, US4923037 and DE 102004019714Al. The locking systems of known fall arrest devices have many disadvantages:
- ils ont une fiabilité défaillante lors d'une descente contrôlée lorsque la corde est inclinée. Leurs systèmes de blocage est généralement une came pouvant présenter un risque s'il y a une mauvaise manipulation de l'appareil- They have poor reliability during a controlled descent when the rope is inclined. Their locking systems are usually a cam that can present a risk if there is a mishandling of the device
- ils n'ont généralement pas de moyen permettant uniquement la remontée le long de la corde. - ils n'ont généralement pas de moyen permettant de descendre suspendu à la corde après une chute- They usually do not have a means for only the ascent along the rope. - they generally do not have a way to get off the rope after a fall
-ils détériorent très rapidement les cordesthey deteriorate very quickly the strings
-ils sont généralement lourds et encombrantsthey are usually heavy and bulky
-ils ne permettent généralement pas de sécuriser une autre personnethey usually do not allow to secure another person
L'objet de cette invention a pour but de supprimer tous ces inconvénients. Le dispositif selon cette invention est muni d'un système de blocage comportant :The purpose of this invention is to remove all these disadvantages. The device according to this invention is provided with a locking system comprising:
- d'un coté de la corde au moins une surface d'appui de la corde- on one side of the rope at least one support surface of the rope
- de l'autre coté de la corde au moins une cavité contenant en partie basse au moins une masselotte libre et formant en partie haute au moins une surface d'appui inclinée vers la corde, la masselotte libre étant apte lors d'une circulation rapide de la corde à se déplacer vers la surface d'appui inclinée jusqu'au blocage de la corde entre ladite masselotte libre et la surface d'appui de la corde. Le dispositif se caractérise en ce que le système de blocage est muni d'un organe de pression permettant, lors d'une circulation contrôlée de la corde, à la masselotte libre d'être toujours en contact avec la corde et de rester dans ladite partie basse de la cavité sans toucher la surface d'appui inclinée, quelque soit l'inclinaison de la corde et quelque soit la position du dispositif. Une autre caractéristique est que l'organe de pression appuie sur un axe permettant la rotation de la masselotte libre sur elle-même et que ce dit axe est libre en rotation par rapport à la masselotte libre cette dernière étant une couronne. Dans d'autre mode de réalisation la masselotte libre peut comporter une masse décentrée, le système de blocage peut comporter un train de roulement situé entre ladite masselotte libre et la surface d'appui inclinée, ladite masselotte comportant au moins une surface apte à recevoir le dit train de roulement. Ladite masselotte libre a un état de surface lisse pour ne pas détériorer la corde. De plus l'adhérence de la corde sur la masselotte libre est plus importante que l'adhérence des autres zones de contact sur ladite masselotte libre. Une autre caractéristique est que le système de blocage est muni d'un levier permettant de débloquer ladite masselotte libre lorsque la masselotte libre est en position bloquée contre la corde et même lorsque cette dernière est sous charge ce qui autorise la circulation freinée de la dite corde lors de la descente de l'utilisateur par exemple. Le dispositif est encore caractérisé en ce que le système de blocage est muni d'un organe de poussée activé manuellement permettant à la masselotte libre d'être en contact avec la corde et avec la surface d'appui inclinée, ce qui permet uniquement la circulation de la corde dans un sens et le blocage dans l'autre sens.- On the other side of the rope at least one cavity containing in the lower part at least one free flyweight and forming in the upper part at least one support surface inclined towards the rope, the free weight being fit during a fast flow the rope to move towards the inclined bearing surface until the rope is locked between said free weight and the bearing surface of the rope. The device is characterized in that the locking system is provided with a pressure member allowing, during a controlled circulation of the rope, the free weight to always be in contact with the rope and to remain in said part. bottom of the cavity without touching the inclined support surface, whatever the inclination of the rope and whatever the position of the device. Another characteristic is that the pressure member presses on an axis allowing rotation of the free flyweight on itself and that said axis is free to rotate relative to the free flyweight the latter being a ring. In another embodiment the free weight may comprise an off-center mass, the locking system may comprise a running gear located between said free weight and the inclined bearing surface, said weight comprising at least one surface capable of receiving the said running gear. Said free weight has a smooth surface condition so as not to damage the rope. In addition, the adhesion of the rope to the free weight is greater than the adhesion of the other contact zones on said free weight. Another feature is that the locking system is provided with a lever for unlocking said free weight when the free weight is locked against the rope and even when this last is under load which allows the braking of the said rope during the descent of the user for example. The device is further characterized in that the locking system is provided with a manually activated thrust member allowing the free weight to be in contact with the rope and with the inclined bearing surface, which allows only the circulation the rope in one direction and the blockage in the other direction.
Le résultat de cette invention est un dispositif de sécurité, antichute suiveur, bloqueur et descendeur. Ce nouveau dispositif offre donc des possibilités de remontée sur corde fixe, de montée et descente contrôlée le long de la corde fixe, d'une fonction descendeur lorsque l'utilisateur est suspendu au dispositif après une chute ou lors d'une descente en rappel et il s'utilise aussi pour sécuriser une autre personne, le dispositif est alors attaché à une personne au sol qui réalise l'assurage en accompagnant la circulation dans le dispositif de la corde mobile reliée à l'autre personne, permettant ainsi la progression du grimpeur ou travailleur en toute sécurité.The result of this invention is a safety device, fall arrest follower, blocker and descender. This new device therefore offers the possibility of rope ascending, controlled climb and descent along the fixed rope, a descending function when the user is suspended from the device after a fall or during abseiling and it is also used to secure another person, the device is then attached to a person on the ground who performs the belay accompanying the movement in the device of the mobile rope connected to the other person, allowing the progression of the climber or worker safely.
La description qui va suivre est faite à titre d'exemple indicatif et non limitatif en regard des dessins annexés sur lequel : - la figure 1 est une vue en perspective du dispositif installé sur une corde (1) de sécuritéThe following description is given by way of indicative and nonlimiting example with reference to the accompanying drawings in which: - Figure 1 is a perspective view of the device installed on a rope (1) security
- la figure 2 est une vue en perspective montrant l'autre côté du dispositifFIG. 2 is a perspective view showing the other side of the device
- la figure 3 est une vue en coupe représentant le dispositif en mode « antichute suiveur »FIG. 3 is a sectional view showing the device in "fall arrest" mode
- la figure 4 est une vue en coupe représentant le dispositif en mode « bloqueur »FIG. 4 is a sectional view showing the device in "blocker" mode
- la figure 5 est une vue en coupe représentant le dispositif en mode « descendeur ». - la figure 6 est une vue en coupe représentant un autre mode de réalisation de l'organe de pression (8). Les figures 1 et 2 montrent un exemple de réalisation du dispositif selon l'invention, il est représenté en perspective en position d'utilisation installé sur une corde (1) de sécurité, et un mousqueton d'attache (12) relie généralement le dispositif au baudrier de l'utilisateur, ce dernier n'étant pas représenté. Le dispositif selon cette invention peut s'utiliser pour sécuriser une autre personne avec une corde de sécurité mobile, le dispositif sera fixé à la personne au sol et installé sur une corde (1) mobile reliant le grimpeur, donc lors d'un assurage en « moulinette », la corde de sécurité mobile coulisse généralement dans un anneau fixé en haut de la paroi, ou lorsque un grimpeur monte « en tête », alors il relie la corde de sécurité mobile à des anneaux fixés dans la paroi par l'intermédiaire de mousquetons, au fur et à mesure de sa progression. Le dispositif peut aussi s'utiliser comme antichute suiveur, le dispositif est alors attaché à l'utilisateur et installé sur une corde de sécurité fixe attachée en haut de la paroi, le dispositif auto assure donc l'utilisateur se déplaçant le long de cette dite corde de sécurité fixe.- Figure 5 is a sectional view showing the device in "descending" mode. - Figure 6 is a sectional view showing another embodiment of the pressure member (8). Figures 1 and 2 show an embodiment of the device according to the invention, it is shown in perspective in the use position installed on a rope (1) safety, and a carabiner attachment (12) generally connects the device to the user's shoulder belt, the latter not being represented. The device according to this invention can be used to secure another person with a mobile safety rope, the device will be attached to the person on the ground and installed on a rope (1) mobile connecting the climber, so during a belay "Roping machine", the movable safety rope generally slides in a ring fixed at the top of the wall, or when a climber climbs "in the lead", then it connects the movable safety rope to rings fixed in the wall via carabiners, as it progresses. The device can also be used as a fall arrester follower, the device is then attached to the user and installed on a fixed safety rope attached to the top of the wall, the self device thus ensures the user moving along the said fixed safety rope.
Pour simplifier le brevet, le fonctionnement du dispositif sera expliqué dans les figures 3, 4, 5 lorsque le dispositif est utilisé comme antichute installé sur une corde (1) fixe,car le fonctionnement du dispositif est similaire lorsqu'il est utilisé pour sécuriser une autre personne.To simplify the patent, the operation of the device will be explained in Figures 3, 4, 5 when the device is used as fall arrester installed on a rope (1) fixed, because the operation of the device is similar when used to secure a other person.
Lors de l'utilisation comme antichute suiveur en montée ou en descente contrôlée, le dispositif suit le déplacement de l'utilisateur sans engendrer de blocage, le dispositif est libre de circuler le long de la corde (1) quelque soit son inclinaison en montée ou en descente. Sur la figure 1, on voit le corps (2) du dispositif, la pièce (17) solidaire du corps (2), le couvercle (13) rotatif autour de l'axe (14). En pointillé le couvercle (13) est en position « ouvert » et permet donc l'introduction de la corde (1) à l'intérieur du dispositif. Le couvercle (13) se verrouille après la rotation autour de l'axe (14) par l'axe escamotable (15) dans le trou (16) du couvercle (13). Ce système de fermeture du corps (2) est un exemple et ne sera pas défini dans les figures suivantes.When used as a fall arrest device for climbing or controlled descent, the device follows the movement of the user without causing a blockage, the device is free to circulate along the rope (1) regardless of its inclination uphill or downhill. In Figure 1, we see the body (2) of the device, the part (17) integral with the body (2), the lid (13) rotatable about the axis (14). Dotted the cover (13) is in the "open" position and thus allows the introduction of the rope (1) inside the device. The lid (13) is locked after rotation about the axis (14) by the retractable pin (15) in the hole (16) of the lid (13). This body closure system (2) is an example and will not be defined in the following figures.
Sur la figure 2, on voit en bas du corps (2) du dispositif un levier (18) solidaire de l'organe de poussée (9) situé à l'intérieur et l'ensemble étant articulé par l'axe (20). Le levier (18) permet d'activer manuellement l'organe de poussée (9) en le libérant du cran escamotable (19). Lorsque le levier (18) est retenu sous le cran escamotable (19), le dispositif est en mode « antichute suiveur », il autorise une circulation contrôlée de la corde (1) donc un déplacement de l'utilisateur en montée et en descente contrôlée sans engendrer de blocage. Par contre, lorsque le levier (18) est libéré du cran escamotable (19), comme représenté en pointillé sur la figure 2, le dispositif est en mode « bloqueur », il autorise donc uniquement la circulation de la corde (1) dans un sens correspondant à un déplacement de l'utilisateur en montée et occasionnera un blocage de la corde (1) dans le sens opposé lors de la descente par exemple. Ce levier (18) permet à l'utilisateur lors de l'escalade d'une falaise par exemple avec le dispositif en mode « antichute suiveur », de passer en mode « bloqueur » afin d'être tenu par la corde (1) pour franchir un passage trop difficile, par exemple, puis revenir en mode « antichute suiveur » pour continuer sa progression en montée ou en descente. Sur les figures 1 et 2, on voit le levier (10) de déblocage replié a l'intérieur du corps (2). L'ensemble des pièces qui constituent le dispositif sont de préférence réalisées en métal, de type aluminium embouti ou injecté.In Figure 2, there is seen at the bottom of the body (2) of the device a lever (18) integral with the thrust member (9) located inside and the assembly being hinged by the axis (20). The lever (18) allows to manually activate the thrust member (9) by releasing the retractable notch (19). When the lever (18) is retained under the retractable notch (19), the device is in the "fall arrest follower" mode, it allows a controlled circulation of the rope (1) thus a user displacement in ascending and descending controlled without causing blockage. On the other hand, when the lever (18) is released from the retractable notch (19), as shown in dashed lines in FIG. 2, the device is in "blocker" mode, it therefore only authorizes the circulation of the rope (1) in a direction corresponding to a displacement of the user uphill and cause a blocking of the rope (1) in the opposite direction during the descent for example. This lever (18) allows the user during the climbing of a cliff for example with the device in "fall arrest" mode, to switch to "blocker" mode to be held by the rope (1) for for example, to cross a passage that is too difficult, then return to the "fall arrest" mode to continue climbing uphill or downhill. In Figures 1 and 2, we see the unlocking lever (10) folded inside the body (2). All the parts that make up the device are preferably made of metal, stamped or injected aluminum type.
Suivant d'autres modes de réalisation, certains organes essentiels du dispositif pourraient être en acier, puis un surmoulage de plastique résistant de ces dits organes essentiels formerait le corps du dispositif. La figure 3 montre le fonctionnement du dispositif lorsqu'il est en mode « antichute suiveur » (le levier (18) est donc retenu sous le cran escamotable (19) représenté sur la figure 2). On voit les parties nécessaires au fonctionnement du dispositif :According to other embodiments, certain essential organs of the device could be made of steel, then a molding of resistant plastic of these said essential organs would form the body of the device. Figure 3 shows the operation of the device when it is in "fall arrest" mode (the lever (18) is therefore retained under the retractable notch (19) shown in Figure 2). We see the parts necessary for the functioning of the device:
- d'un coté de la corde (1) une surface d'appui (4) de la corde (1)- on one side of the rope (1) a bearing surface (4) of the rope (1)
- de l'autre coté de la corde (1) à l'opposé de la surface d'appui (4) une cavité (5) contenant en partie basse une masselotte libre (7) et formant en partie haute une surface d'appui inclinée (6) vers la corde (1).- On the other side of the rope (1) opposite the bearing surface (4) a cavity (5) containing in the lower part a free weight (7) and forming in the upper part a bearing surface inclined (6) towards the rope (1).
L'organe de pression (8) est articulé en rotation autour de l'axe (22) et applique une pression sur la masselotte libre (7) par l'effet d'un ressort de traction (24). Ce dit ressort de traction (24) compense largement le poids de la masselotte libre (7).The pressure member (8) is articulated in rotation about the axis (22) and applies a pressure on the free weight (7) by the effect of a tension spring (24). This traction spring (24) largely compensates for the weight of the free weight (7).
De part son sens de pression l' organe de pression (8) permet donc à la masselotte libre (7) d'être toujours en contact avec la corde (1) et de rester dans ladite partie basse de la cavité (5) sans toucher la surface d'appui inclinée (6), quelque soit l'inclinaison de la corde (1) et quelque soit la position du dispositif.Because of its direction of pressure the pressure member (8) thus allows the free weight (7) to always be in contact with the rope (1) and to remain in said lower part of the cavity (5) without touching the inclined support surface (6), whatever the inclination of the rope (1) and whatever the position of the device.
Lors du déplacement dans le sens de la montée de l'utilisateur, la masselotte libre (7) roule sur la cordeWhen moving in the direction of the rise of the user, the free weight (7) rolls on the rope
(1) et tourne sur elle-même sur la surface d'appui basse (21) de la cavité (5), la corde (1) entraîne la - A -(1) and turns on itself on the low bearing surface (21) of the cavity (5), the rope (1) causes the - AT -
masselotte libre (7) et on remarque que le sens de rotation tend toujours à plaquer la masselotte libre (7) contre la corde (1) et contre la surface d'appui basse (21), la masselotte libre (7) ne peut donc pas engendrer de blocage. Lors d'une descente contrôlée la masselotte libre (7) roule sur la corde (1) et tourne sur elle-même sur la surface d'appui basse (21), mais son sens de rotation étant inverse, la masselotte libre (7) tend à s'écarter de la corde (1) fixe vers la surface d'appui inclinée (6). On comprend que lors d'une descente contrôlée l'organe de pression (8) va maintenir une pression sur la masselotte libre (7) afin de la positionner toujours en contact avec la corde (1) et en bas de la cavité (5) contre la surface d'appui basse (21), la masselotte libre (7) va donc rouler sur la corde (1), déraper sur la surface d'appui basse (21) et sur l' organe de pression (8) sans occasionner de blocage. Le dérapage de la masselotte libre (7) sur la surface d'appui basse (21) et sur l' organe de pression (8) se comprend car d'une part l'adhérence de la corde (1) sur la masselotte libre (7) est plus importante que l'adhérence des zones de contact de l'organe de pression (8) et de la surface d'appui basse (21), de part la taille des surfaces de contact et de part la nature des matériaux, et d'autre part la direction de la pression de l'organe de pression (8) sur la masselotte libre (7) étant vers la corde (l)et vers la surface d'appui basse (21) donc à l'opposé de la surface d'appui inclinée (6).free weight (7) and note that the direction of rotation always tends to press the free weight (7) against the rope (1) and against the low bearing surface (21), the free weight (7) can not not cause blocking. During a controlled descent the free weight (7) rolls on the rope (1) and turns on itself on the low bearing surface (21), but its direction of rotation being reversed, the free weight (7) tends to move away from the rope (1) fixed towards the inclined bearing surface (6). It is understood that during a controlled descent the pressure member (8) will maintain a pressure on the free weight (7) to position it always in contact with the rope (1) and at the bottom of the cavity (5) against the low bearing surface (21), the free weight (7) will roll on the rope (1), skid on the low bearing surface (21) and on the pressure member (8) without causing blocking. The skidding of the free weight (7) on the low bearing surface (21) and on the pressure member (8) is understood because on the one hand the adhesion of the rope (1) to the free weight ( 7) is more important than the adhesion of the contact zones of the pressure member (8) and the low bearing surface (21), due to the size of the contact surfaces and the nature of the materials, and on the other hand the direction of the pressure of the pressure member (8) on the free weight (7) being towards the rope (l) and towards the low bearing surface (21), therefore the opposite of the inclined bearing surface (6).
On comprend encore que lors d'une chute de l'utilisateur, le dispositif en mode « antichute suiveur», va provoquer une accélération de la circulation de la corde (1) dans le dispositif, donc l'accélération en rotation de la masselotte libre (7) ce qui engendre une augmentation de frottement sur l' organe de pression (8) ce qui entraîne de ce fait le déplacement de la masselotte libre (7) vers le haut de la cavité (5) en repoussant l'organe de pression (8) puis ladite masselotte libre (7) va rouler sur la surface d'appui inclinée (6) jusqu'au blocage de la corde (1) entre ladite masselotte libre (7) et la surface d'appui (4). L'organe de pression (8) donne une grande fiabilité au dispositif même si il est employé avec différents diamètres de corde. Dans une autre version du dispositif, on peut facilement imaginer le réglage de la force de l'organe de pression (8) en ajustant la tension du ressort (24) en positionnant le point d'attache fixe (23) sur un excentrique. De ce fait, on pourra grâce à ce dit excentrique, régler la vitesse à laquelle le dispositif en mode « antichute suiveur » va bloquer la corde (1).It is further understood that during a fall of the user, the device in "fall arrest follower" mode, will cause an acceleration of the movement of the rope (1) in the device, thus the acceleration in rotation of the free flyweight (7) which generates an increase in friction on the pressure member (8), thereby causing the free flyweight (7) to move towards the top of the cavity (5) by pushing back the pressure member (8) then said free weight (7) will roll on the inclined bearing surface (6) until the locking of the rope (1) between said free weight (7) and the bearing surface (4). The pressure member (8) gives a high reliability to the device even if it is used with different diameters of rope. In another version of the device, one can easily imagine adjusting the force of the pressure member (8) by adjusting the tension of the spring (24) by positioning the fixed attachment point (23) on an eccentric. Therefore, it will be possible with this eccentric, adjust the speed at which the device in "fall arrest" mode will block the rope (1).
La dimension, la forme et l'état de surface de la masselotte libre (7) conditionnent les autres paramètres du dispositif. Une masselotte libre de forme triangulaire en vue de côté, comportant un train de roulement entre la dite masselotte libre et la surface d'appui inclinée est une autre façon de réaliser le système de blocage du dispositif; Ainsi on peut donc imaginer de nombreux modes de réalisation selon les caractéristiques de ladite invention, mais un état de surface lisse de la masselotte libre (7) sera préférable pour ne pas détériorer les cordes. La figure 4 est une coupe partielle du dispositif en mode « bloqueur ». L'organe de poussée (9) solidaire du levier (18) extérieur est représenté en position active, l'utilisateur est libre de se déplacer en montée et le dispositif occasionnera le blocage de la corde (1) dans le sens de la descente. L'organe de poussée (9) étant solidaire au levier (18) (représenté en pointillés sur la figure 2), il est donc en position active lorsqu'il est libre de pivoter sur l'axe (20), afin de pousser la masselotte libre (7) contre la corde (1) et contre la surface d'appui inclinée (6), grâce à la force d'un ressort de traction (25). Ce dit ressort de traction (25) possède une force suffisamment importante afin que la masselotte libre (7) repousse l'organe de pression (8) et vienne franchement en butée contre la corde (1) et contre la surface d'appui inclinée (6). L'organe de poussée (9) solidaire du levier (18) est en position inactive comme représenté figure 3, lorsque le levier (18) est retenu sous le cran escamotable (19), comme représenté sur la figure 2. Il faut donc activer manuellement le levier (18) pour passer du modeThe size, shape and surface condition of the free weight (7) condition the other parameters of the device. A free flyweight of triangular shape in side view, comprising a running gear between said free weight and the inclined bearing surface is another way to achieve the locking system of the device; Thus one can imagine many embodiments according to the features of said invention, but a smooth surface state of the free weight (7) will be preferable to not damage the strings. Figure 4 is a partial section of the device in "blocker" mode. The push member (9) integral with the lever (18) is shown in the active position, the user is free to move uphill and the device will cause the locking of the rope (1) in the direction of descent. The thrust member (9) being integral with the lever (18) (shown in dashed lines in FIG. 2), it is therefore in the active position when it is free to pivot on the axis (20), in order to push the free weight (7) against the rope (1) and against the inclined bearing surface (6), thanks to the force of a spring of traction (25). This traction spring (25) has a sufficiently large force so that the free weight (7) pushes the pressure member (8) and comes into abutment against the rope (1) and against the inclined bearing surface ( 6). The thrust member (9) integral with the lever (18) is in the inactive position as shown in FIG. 3, when the lever (18) is retained under the retractable notch (19), as shown in FIG. manually the lever (18) to switch from
« antichute suiveur » au mode « bloqueur »."Fall arrest" in "blocker" mode.
La figure 5 est une coupe partielle du dispositif en mode « descendeur », c'est-à-dire, lorsque l'utilisateur est suspendu à la corde (1) grâce au blocage du dispositif, soit après une chute, soit lors d'une descente en rappel. On voit la masselotte libre (7) en position bloquée, le mousqueton d'attache (12) partiellement représenté avec une flèche indiquant la direction des efforts sur le dispositif, et on voit que la corde (1) est enroulée autour de la partie de frottement (26) du dispositif.FIG. 5 is a partial section of the device in "descending" mode, that is to say, when the user is suspended from the rope (1) thanks to the blocking of the device, either after a fall or during abseiling. We see the free weight (7) in the locked position, the carabiner attachment (12) partially shown with an arrow indicating the direction of the forces on the device, and we see that the rope (1) is wrapped around the part of friction (26) of the device.
En effet, le trou d'attache (28) dans le corps (2) du dispositif étant en dessus du système de blocage lorsque le dispositif est en position d'utilisation pour une montée (figures 1, 2, 3 et 4), il entraîne le basculement du dispositif au niveau de l'extrémité arrondie (27) de la partie de frottement (26) lors du blocage de la corde (1). La corde (1) se trouve enroulée autour de la partie de frottement (26), ce qui augmente les frottements, facilite le contrôle de la descente en rappel et use moins les cordes. On voit le levier (10) replié, et en pointillé, on voit le levier (10) en train de débloquer la masselotte libre (7) engendrant ainsi le glissement de la corde (1) donc la descente de l'utilisateur. Les figures 3,4,5 ont été expliquées lorsque le dispositif est utilisé comme antichute, mais il fonctionne de la même manière lorsqu'il est utilisé pour l'assurage d'une autre personne, dans ce cas le dispositif est fixe et la corde (1) est mobile.Indeed, the fastening hole (28) in the body (2) of the device being above the locking system when the device is in use position for a rise (Figures 1, 2, 3 and 4), it causes the device to tilt at the rounded end (27) of the friction portion (26) during the locking of the rope (1). The rope (1) is wrapped around the friction portion (26), which increases the friction, facilitates the control of the abseiling and uses less the ropes. We see the lever (10) folded, and dotted, we see the lever (10) unlocking the free weight (7) thus causing the sliding of the rope (1) so the descent of the user. Figures 3,4,5 were explained when the device is used as fall arrest, but it works the same way when it is used for the belaying of another person, in this case the device is fixed and the rope (1) is mobile.
La figure 6 est une vue en coupe représentant un autre mode de réalisation de l'organe de pression (8), les autres pièces n'étant pas représentées pour plus de clarté. Dans ce mode de réalisation on voit l'organe de pression (8), cette fois articulé au point (30), appuyant de part et d'autre de la masselotte libre (7) sur l'axe (29) par l'effort d'un ressort de traction (31) permettant ainsi à la masselotte libre (7) d'être toujours en contact avec la corde (l).On remarque que le dit axe (29) est libre en rotation par rapport à la masselotte libre (7) cette dernière étant une couronne comportant un trou central environ trois fois plus grand que le diamètre de l'axe (29).On remarque aussi que l'organe de pression (8) comporte une forme permettant de maintenir l'axe (29) dans une position définie et que cette dite forme est prolongée d'une partie inclinée (32) cette dernière permettant de maintenir l'axe (29) vers le bas ce qui permet donc à la masselotte libre (7) de ne pas toucher la surface d'appui inclinée (6) lors de la circulation contrôlé de la corde (1). Ce mode de réalisation de l'organe de pression (8) permet de fiabiliser le dispositif car le fait que l'organe de pression (8) appui sur l'axe (29), cela diminue les frottements sur l'organe de pression (8) et on peut donc augmenter la force du ressort (31) ce qui permet un excellent contact de la masselotte libre (7) sur la corde (1). De plus le fait que la masselotte libre (7) soit une couronne, augmente la sensibilité de contact entre la dite masselotte et la corde (1), ce qui permet d'accentuer la partie inclinée (32) du dit organe de pression fiabilisant ainsi la circulation contrôlée de la corde (1) et évitant le blocage intempestif de la corde. Dans un autre mode de réalisation de la masselotte libre (7) non représenté, cette dernière peut comporter une masse décentrée permettant d'optimiser le dispositif comme expliquer ci-dessus. Figure 6 is a sectional view showing another embodiment of the pressure member (8), the other parts are not shown for clarity. In this embodiment we see the pressure member (8), this time articulated at the point (30), pressing on either side of the free weight (7) on the axis (29) by the effort a traction spring (31) thus allowing the free weight (7) to always be in contact with the rope (1) .Note that said shaft (29) is free to rotate with respect to the free flyweight (7) the latter being a ring having a central hole about three times larger than the diameter of the axis (29) .No also note that the pressure member (8) has a shape to maintain the axis ( 29) in a defined position and that said shape is extended by an inclined portion (32) the latter to maintain the axis (29) down which allows the free weight (7) not to touch the inclined support surface (6) during the controlled circulation of the rope (1). This embodiment of the pressure member (8) makes the device more reliable because the fact that the pressure member (8) bears on the axis (29) reduces the friction on the pressure member ( 8) and can therefore increase the force of the spring (31) which allows excellent contact of the free weight (7) on the rope (1). In addition, the fact that the free weight (7) is a ring gear increases the contact sensitivity between the said weight and the rope (1), which makes it possible to accentuate the inclined portion (32) of the said reliable pressure member the controlled circulation of the rope (1) and avoiding the inadvertent blocking of the rope. In another embodiment of the flyweight free (7) not shown, the latter may include an off-center mass to optimize the device as explained above.

Claims

REVENDICATIONS
1) Dispositif antichute suiveur utilisé avec une corde (1) de sécurité destiné à sécuriser une personne, comportant :1) Follower anti-fall device used with a safety rope (1) intended to secure a person, comprising:
- un corps (2) équipé d'un système de blocage occupant soit une position active de blocage de la corde (1) lors de la circulation rapide de ladite corde (1) dans le dispositif engendré par exemple par une chute, soit une position inactive de déblocage autorisant la circulation contrôlée de la corde (1) dans le dispositif correspondant à la progression d'une personne dans le sens de la montée, ou dans le sens opposé lors d'une descente contrôléea body (2) equipped with a locking system occupying either an active locking position of the rope (1) during the rapid circulation of said rope (1) in the device generated for example by a fall, or a position inactive deblocking allowing the controlled circulation of the rope (1) in the device corresponding to the progression of a person in the direction of the climb, or in the opposite direction during a controlled descent
- des moyens d'attaches pour la liaison du corps (2) du dispositif à un baudrier d'assurance le système de blocage comportant : - d'un coté de la corde (1) au moins une surface d'appui (4) de la corde (1)- Fastening means for connecting the body (2) of the device to an insurance belt The locking system comprising: - on one side of the rope (1) at least one bearing surface (4) of the rope (1)
- de l'autre coté de la corde (1) au moins une cavité (5) contenant en partie basse au moins une masselotte libre (7) et formant en partie haute au moins une surface d'appui inclinée (6) vers la corde (1), la masselotte libre (7) étant apte lors de la circulation rapide de la corde (1) à se déplacer vers la surface d'appui inclinée (6) jusqu'au blocage de la corde (1) entre ladite masselotte libre (7) et la surface d'appui (4) caractérisé en ce que le système de blocage est en outre muni d'un organe de pression (8) permettant, lors de la circulation contrôlée de la corde (1), à la masselotte libre (7) d'être toujours en contact avec ladite corde (1) et de rester dans ladite partie basse de la cavité (5) sans toucher la surface d'appui inclinée (6), quelque soit l'inclinaison de la corde (1) et quelque soit la position du dispositif.- On the other side of the rope (1) at least one cavity (5) containing in the lower part at least one free weight (7) and forming at the top part at least one inclined bearing surface (6) towards the rope (1), the free weight (7) being adapted during the rapid movement of the rope (1) to move towards the inclined bearing surface (6) until the locking of the rope (1) between said free weight (7) and the bearing surface (4) characterized in that the locking system is further provided with a pressure member (8) allowing, during the controlled circulation of the rope (1), the flyweight free (7) to always be in contact with said rope (1) and to remain in said lower part of the cavity (5) without touching the inclined bearing surface (6), whatever the inclination of the rope ( 1) and whatever the position of the device.
2) Dispositif selon la revendication 1, caractérisé en ce que l'organe de pression (8) appuie sur un axe (29) permettant la rotation de la masselotte libre (7) sur elle-même.2) Device according to claim 1, characterized in that the pressure member (8) bears on an axis (29) for rotation of the free weight (7) on itself.
3) Dispositif selon la revendication 2 caractérisé en ce que le dit axe (29) est libre en rotation par rapport à la masselotte libre (7) cette dernière étant une couronne.3) Device according to claim 2 characterized in that said axis (29) is free to rotate relative to the free weight (7) the latter being a ring.
4) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la masselotte libre (7) comporte une masse décentrée. 5) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de blocage comporte un train de roulement situé entre la masselotte libre (7) et la surface d'appui inclinée (6), ladite masselotte libre (7) comportant au moins une surface apte à recevoir le dit train de roulement. 6) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la masselotte libre (7) a un état de surface lisse. 7) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de blocage est muni d'un levier (10) permettant de débloquer ladite masselotte libre (7) lorsque la elle est en position bloquée contre la corde (1), même lorsque cette dernière est sous charge. 8) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de blocage est muni d'un organe de poussée (9) activé ou désactivé manuellement permettant dans sa position active à la masselotte libre (7) d'être en contact avec la corde (1) et avec la surface d'appui inclinée (6). 9) Utilisation du dispositif selon l'une quelconque des revendications précédentes pour sécuriser une autre personne, le dispositif est alors attaché à une personne qui réalise l'assurage, en accompagnant la circulation dans le dispositif de la corde mobile reliée à l'autre personne. 4) Device according to any one of the preceding claims, characterized in that the free weight (7) comprises an off-center mass. 5) Device according to any one of the preceding claims, characterized in that the locking system comprises a running gear located between the free weight (7) and the inclined bearing surface (6), said free weight (7). having at least one surface adapted to receive said undercarriage. 6) Device according to any one of the preceding claims, characterized in that the free weight (7) has a smooth surface state. 7) Device according to any one of the preceding claims, characterized in that the locking system is provided with a lever (10) for unlocking said free weight (7) when it is in the locked position against the rope (1). ), even when the latter is under load. 8) Device according to any one of the preceding claims, characterized in that the locking system is provided with a thrust member (9) activated or deactivated manually allowing in its active position to the free weight (7) to be in contact with the rope (1) and with the inclined bearing surface (6). 9) Use of the device according to any one of the preceding claims to secure another person, the device is then attached to a person who carries out the belay, accompanying the movement in the device of the moving rope connected to the other person .
EP07848287A 2007-09-26 2007-09-26 Follow-up fall prevention device Active EP2192959B1 (en)

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EP2192959B1 (en) 2011-07-20
US8387751B2 (en) 2013-03-05

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