EP3666473B1 - Optimized restraining system - Google Patents

Optimized restraining system Download PDF

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Publication number
EP3666473B1
EP3666473B1 EP19212597.9A EP19212597A EP3666473B1 EP 3666473 B1 EP3666473 B1 EP 3666473B1 EP 19212597 A EP19212597 A EP 19212597A EP 3666473 B1 EP3666473 B1 EP 3666473B1
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EP
European Patent Office
Prior art keywords
tool
assembly
cord
fall
assembly according
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EP19212597.9A
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German (de)
French (fr)
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EP3666473A1 (en
Inventor
Régis BONNET
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Georges Renault SAS
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Georges Renault SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H3/00—Storage means or arrangements for workshops facilitating access to, or handling of, work tools or instruments

Definitions

  • the field of the invention is that of secure retaining devices for portable tools.
  • Portable tools such as screwdrivers, drills, riveters or the like, are commonly used by operators to carry out work at a height of several meters.
  • the portable tools are connected to retaining devices so as to retain the tool in the event of a fall if the operator inadvertently releases the tool, makes a false movement or mishandling.
  • Such restraint devices ensure that the tool does not fall to the ground and deteriorate, and that the tool does not strike a machine or a person below the operator's intervention area.
  • the document US-A1-2013062498 describes a retaining device comprising a mooring ring fixed rigidly to the tool by means of a fixing lug.
  • a fixed structure such as scaffolding, a support arm or the like
  • a safety cord one end of which is fixed to the fixed structure. and the other end is fixed to the mooring ring integral with the tool.
  • the document US-A1-20180132600 describes a device according to the preamble of claim 1.
  • the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is attached to the mooring loop attached to the tool.
  • the document US-A1-2018/0084895 describes a retaining device comprising a strap, carrying a mooring ring, intended to be wound around a tool.
  • the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is fixed to the ring mooring attached to the tool.
  • Retaining devices comprising a sheet fixed to the tool and folded to form a mooring point.
  • the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is fixed to the point of mooring attached to the tool.
  • the retaining device In the worst case, if the retaining device is insufficiently sized, it may break under the effect of the forces caused by the fall of the tool so that the fall of the latter to the ground cannot be avoided, leading to a significant risk of irreversibly damaging the tool and/or its environment and causing injury to a person located under the work area.
  • Such a technique makes it possible to cushion the fall of a tool to a certain extent and to reduce the forces absorbed by the latter during its fall.
  • the spring used is however relatively heavy.
  • the small fixing brackets may lack robustness.
  • none of the retention devices of the prior art makes it possible to give a predetermined orientation to a tool at the end of its fall, in particular to limit its bulk with respect to its environment during or at the end of its fall. .
  • Portable tool retainers can thus be further improved.
  • the object of the invention is in particular to provide an effective solution to at least some of these various problems.
  • an object of the invention is to provide a portable tool retaining device which is robust.
  • the object of the invention is to provide such a retaining device which makes it possible to preserve the integrity of a portable tool during its fall.
  • Another object of the invention is, according to at least one embodiment, to provide such a retaining device which makes it possible to give a privileged orientation to a tool during the fall.
  • Another object of the invention is, according to at least one embodiment, to provide such a retaining device which makes it possible to indicate that a tool must undergo an overhaul if the forces it has undergone during a drop exceeds a certain threshold.
  • Another object of the invention is, according to at least one embodiment, to provide such a retaining device which is light.
  • Another object of the invention is, according to at least one embodiment, to provide such a retaining device which is simple in design and/or economical.
  • the invention proposes a retaining assembly capable of being fixed to a portable tool to allow the connection of a safety cord to said tool.
  • the invention proposes a particularly robust retaining assembly, in particular due to the implementation of the fixing plates which are sized to withstand the forces due to the fall of a portable tool intended to be secured to the retaining assembly. .
  • the zone located below an intervention zone at height is thus made safe so that the risk of damaging equipment which might be there or of injuring people who might move there is very low.
  • Such a retaining assembly can in particular allow the secure retention of heavy portable tools having a weight of between 7 and 30 kg.
  • said first and second flexible securing elements are made of a technical textile material.
  • a technical textile is a material made of synthetic or natural fibers with specific properties allowing it to be particularly suitable for a given use.
  • the technical textile chosen will in particular have mechanical properties allowing it to resist the forces caused by the fall of a tool secured to a retaining assembly according to the invention.
  • a technical textile has the advantage of being light. In addition, it can be dimensioned to support significant efforts without significant impact on its weight.
  • the flexible fastening elements made of technical textile material thus make it possible to guarantee robust restraint while keeping the overall weight of the restraint assembly which remains low.
  • a restraint assembly according to the invention thus has the advantage of being very robust while remaining light.
  • the lengths of said first and second securing elements are chosen in order to place said anchoring element with respect to the center of gravity of said tool to which said assembly is intended to be fixed so as to give a predetermined orientation to said tool when it is suspended from said cord by said retaining assembly.
  • the lengths of said first and second securing elements are chosen so as to place said anchoring element along a vertical axis passing through the center of gravity of said tool to which said assembly is intended to be fixed when said assembly is held essentially horizontally.
  • the lengths of said first and second securing elements are chosen so as to place said anchoring element along a vertical axis located on one side or the other of the center of gravity of said tool at which said assembly is intended to be fixed when said assembly is held essentially horizontally.
  • said predetermined orientation is such that the projection on the ground of said tool to which said assembly is intended to be fixed has the smallest possible surface.
  • the lengths of said first and second securing elements are determined so that the largest dimension of said tool to which said assembly is intended to be fixed extends essentially parallel to the longitudinal axis of the cord when said assembly is suspended from said cord.
  • the suspended tool then extends such that its longitudinal axis is essentially vertical.
  • the lengths of said first and second fastening elements are determined so that the head of said tool to which said assembly is intended to be fixed is oriented downwards when said assembly is suspended from said cord.
  • an assembly according to the invention comprises damping means capable of damping the fall of a tool secured to said assembly suspended from said cord.
  • an assembly according to the invention comprises indicator means indicating that a tool fixed to said retaining assembly suspended from said cord has suffered a fall inducing on said tool a force reaching a predetermined threshold beyond which said tool must be revised.
  • At least one of said first and second securing elements is elastically deformable.
  • At least one of said first and second securing elements is plastically deformable beyond said threshold.
  • the forces undergone by the latter reach or exceed a predetermined force threshold, at least one of the securing elements deforms irreversibly. An operator can then easily identify visually that a tool has undergone such forces during its fall that it must be repaired.
  • At least one of said first and second fixing plates is plastically deformable beyond said threshold.
  • the forces undergone by the latter reach or exceed a predetermined force threshold, at least one of the fixing plates deforms irreversibly. An operator can then easily identify visually that a tool has undergone such forces during its fall that it must be repaired.
  • each of said holes is surrounded by an eyelet and said damping end is made of an elastically deformable material.
  • said holes and said damping end are dimensioned such that said predetermined force threshold undergone by said tool during a fall beyond which said tool must be revised is reached after said end d damping has passed a predetermined minimum number of holes.
  • This solution also makes it possible to visualize if a tool has undergone during a fall a force exceeding a force threshold beyond which it must be repaired by looking at the number of holes through which the damping end has passed during a fall.
  • such a restraint assembly 1 comprises a first 10 and a second 11 fixing plates.
  • fixing plates 10, 11 are suitable for being secured to a portable tool by enclosing the body of the latter, as will emerge more clearly subsequently.
  • These fixing plates 10, 11 are preferably made of a metallic material such as, for example, steel or the like. They could alternatively be made of a plastic material, in particular of a composite material.
  • the fixing plates 10, 11 will be sized to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.
  • the fixing plates 10, 11 here essentially have the shape of a "U”, that is to say a shape having an open profile, essentially like a fork, to facilitate the installation of the plates around the body of a portable tool. They could have another shape, in particular a closed contour of essentially rectangular shape, which nevertheless makes them less easy to put in place on the body of a portable tool.
  • the fixing plates 10, 11 are traversed by holes 101, 111 allowing the passage of fixing screws 13 in order to secure the fixing plates 10, 11 to the body of a portable tool.
  • These screws 13 will also be sized to withstand the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.
  • the restraint assembly comprises an anchoring element here taking the form of a ring 14. It could alternatively be a hook or the like.
  • such a ring 14 is capable of allowing the attachment of a safety cord also called retaining cord.
  • a safety cord also called retaining cord.
  • the ring 14 is crossed by a hole 142.
  • Such a safety cord makes it possible to hang up the retaining assembly, and the tool which is secured thereto, to a fixed structure located at height such as for example a scaffolding, a gantry, a nacelle or other.
  • This ring 14 is preferably made of a metallic material such as steel or the like. It may alternatively be made of a plastic material, in particular of a composite material.
  • the ring 14 will be sized to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.
  • the retaining assembly further comprises a first 15 and a second 16 flexible securing elements making it possible to make the ring 14 integral with the fixing plates 10, 11.
  • each securing element 15, 16 is connected at one of its ends to the ring 14 and at the other of its ends respectively to the first fixing plate 10 and to the second fixing plate 11.
  • the ring 14 therefore has two slots 140 with a closed contour allowing the introduction of the corresponding end of the securing elements 15, 16 and delimiting the fixing rods 141.
  • the attachment of an attachment element 15, 16 to the ring 14 is obtained by introducing the corresponding first free end 151, 161 of the fastening element 15, 16 into the corresponding slot 140 of the ring 14.
  • the free end 151, 161 is then wound around the fixing rod 141 to form a loop around it.
  • the free end 151, 161 is secured to the body 150, 160 of the corresponding securing element 15, 16.
  • This connection is preferably made by means of seams.
  • any other suitable fixing solution can be implemented, such as welding or gluing in particular.
  • each attachment element 15, 16 and the ring 14 is dimensioned such that it is irreversible and to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly. .
  • connection between each securing element 15, 16 and the ring 14 essentially constitutes a pivot connection, the axis of which essentially coincides with the longitudinal axis of the corresponding fixing rod 141.
  • the fixing plates 10, 11 are each traversed by a slot 102, 112 with a closed contour allowing the introduction of the corresponding end of the securing elements 15, 16 and delimiting the fixing rods 103, 113.
  • the fastening of a fastening element 15, 16 to a fixing plate 10, 11 is respectively obtained by introducing the corresponding second free end 152, 162 of the fastening element 15, 16 into the slot 102, 112 corresponding to a fixing plate 10, 11.
  • the free end 152, 162 is then wrapped around the fixing rod 103, 113 to form a loop around the latter.
  • the free end 152, 162 is secured to the body 150, 160 of the corresponding securing element 15, 16.
  • This connection is preferably made by means of seams.
  • any other suitable fixing solution can be implemented, such as welding or gluing in particular.
  • each attachment element 15, 16 and each fixing plate 10, 11 is dimensioned such that it is irreversible and to withstand the forces due to the fall over a predetermined height of a portable tool secured to the restraint assembly.
  • connection between each securing element 15, 16 and each fixing plate 10, 11 thus essentially constitutes a pivot connection whose axis is essentially coincides with the longitudinal axis of the corresponding fixing rod 103, 113.
  • the securing elements 15, 16 are preferably made of a technical textile material.
  • a technical textile is a material made of synthetic or natural fibers with specific properties allowing it to be particularly suitable for a given use.
  • the technical textile chosen will in particular have mechanical properties allowing it to resist the forces caused by the fall of a tool secured to a retaining assembly according to the invention.
  • the technical textile may for example be a knit, a fabric, a non-woven, a rope, a braid or the like.
  • the fibers composing it will preferably be non-metallic.
  • nylon fibers They are preferably nylon fibers. Nevertheless, any other material capable of forming fibers and of resisting high mechanical stresses could be envisaged.
  • It may, for example, be a material of the tie-down strap type or automobile seat belt strap.
  • a technical textile has the advantage of being light. In addition, it can be dimensioned to support significant efforts without significant impact on its weight.
  • the flexible fastening elements made of technical textile material thus make it possible to guarantee robust restraint while keeping the overall weight of the restraint assembly which remains low.
  • the fixing plates may be common to several types of tools while the securing elements may be adapted from one type of tool to another depending on the forces caused by the fall of the type of tool supported. A great modularity is thus obtained by a common use of identical fixing plates for different types of tool.
  • the fixing plates will be common to several types of tool insofar as they are capable of withstanding the forces caused by the fall of the type of tool supported. Otherwise, they will be dimensioned to resist the forces caused by the fall of the type of tool supported.
  • At least one of the securing elements 15, 16 may be made of a material that is at least partly elastic, such as for example an elastomer or the like.
  • the elastic deformation of the element of corresponding attachment will cushion the fall of a tool attached to the restraint system suspended from a safety cord. This damping will preserve the tool from damage.
  • the axes of the pivot connections between the fastening elements 15, 16 and the ring 14 on the one hand and the fixing plates 10, 11 on the other hand are preferably essentially parallel to the longitudinal axis of the hole 142 of the ring 14. In variants, they could not be essentially parallel but be essentially orthogonal to the longitudinal axis of the hole 142 of the ring 14.
  • the first 15 and second 16 securing elements preferably have different lengths. As will be explained in more detail later, this allows the ring 14 to be placed on one side or the other of the center of gravity G of a tool 3 to which the retaining assembly is intended to be fixed when the cord 14 is maintained essentially vertically and the longitudinal axis A of the tool 3 is maintained essentially horizontally (cf. picture 3 ).
  • the length of the first 15 and second 16 securing elements is preferably determined so that the longitudinal axis A of the tool 3 to which the retaining assembly is intended to be fixed s extends essentially parallel to the longitudinal axis B of the cord 14 when the restraint assembly is suspended from the cord 14 (cf. figure 4 ).
  • Essentially parallel means that the angle of inclination ⁇ between the axes A and B may for example be between 0 and 15°.
  • the length of the first 15 and second 16 securing elements is determined so that the head 31 of the tool 3 (part carrying a working tool such as a drill, a milling cutter, a screw socket or other%) to which the retaining assembly is intended to be fixed is oriented downwards, that is to say towards the ground, when the retaining assembly is suspended from the cord.
  • the body 30 of the portable tool 3 which it is desired to secure to the retaining assembly is inserted inside the fixing plates 10, 11 through their opening.
  • the fixing plates 10, 11 are then secured to the body 30 by means of the screws 13.
  • the body 30 is then clamped between the two fixing plates 10, 11.
  • a hook 4 secured to one end of the safety cord 2 is then passed through the hole 142 of the ring 14.
  • the other end of cord 2 is fixed to a fixed structure such as here a gantry 5 (partially shown).
  • the gantry 5 is placed in height at the level of the intervention zone of the operator.
  • the length of cord 2 is chosen according to the height of the intervention zone relative to the ground. It is chosen so that when a portable tool is suspended from the cord after having fallen, it is high enough in relation to the surface of the ground not to hit a person or equipment located under the intervention zone.
  • tool 3 When an operator is working at height and inadvertently drops tool 3, it falls within the limit of the length of cord 2. Once the fall height is such that the cord is taut, tool 3 orients itself naturally (under the effect of gravity) in a privileged position imposed by the relative position of the center of gravity G of the tool and of the ring 14.
  • the privileged position of the tool 3 is such that its longitudinal axis A is essentially parallel, or slightly inclined, with respect to the axis B of the cord extending vertically, and that its head 31 is is oriented towards the ground.
  • the tool is then in a position in which it takes up the least space vis-à-vis its environment.
  • the preferred orientation of the tool after the fall is such that the projected surface of the tool on the ground is as small as possible in order to reduce the risk of collision with its environment.
  • this is the orientation in which the tool's greatest dimension (length, width, or height) is substantially parallel to the B-axis of the cord extending vertically when the tool is attached to the device. restrained and suspended from the cord.
  • the preferred orientation may also be such that the longest dimension of the tool extends substantially perpendicular to the vertical when the tool is attached to the retainer and hanging from the cord.
  • the ring is placed along a vertical axis passing through the center of gravity of the tool when the retainer is held horizontally.
  • the latter will deform elastically during the fall of the tool so as to cushion it. This limits the forces to which the tool is subjected during its fall so as to preserve its integrity and avoid its deterioration.
  • one of the first 15 and second 16 securing elements in this case the second even if it could be the first, is traversed by a plurality of holes 163 and is able to be accordion-folded so as to place the holes aligned along the same axis.
  • the figure 9 illustrates the second securing element 16 which takes the form of a strip. This band is traversed by a plurality of holes 163. These holes 163 are arranged along transverse axes perpendicular to the longitudinal axis C of the strip. They are distributed equidistantly along this longitudinal axis C.
  • This band can be at least partly folded on itself like an accordion and thus have a plurality of folds 164.
  • the holes 163 located on the folds 164 are then aligned along the same axis D parallel to the longitudinal axis C .
  • the second fastening element 16 can be kept thus accordion-folded by passing a retaining rod 60 (also called retaining element) through the holes, one of the ends 61 of the rod being snapped into the slot 140 of the hook 14 while the other end carries a damping ball 62 whose section is of dimension(s) greater than that(s) of the holes.
  • a retaining rod 60 also called retaining element
  • the retaining ball 60 will preferably be made of an elastic material such as, for example, elastomer, foam, or another suitable material.
  • An eyelet may delimit the peripheral contour of each hole of the second fastening element.
  • the holes of the securing element 16 and the damping ball 60 are dimensioned such that a predetermined force threshold undergone by the tool during a fall beyond which the tool to be serviced is reached after the damping ball 60 has passed a predetermined minimum number of holes. This threshold can for example be exceeded as soon as the damping ball passes through only one of the holes.
  • the retaining assembly thus comprises means indicating that a tool to which the retaining assembly suspended from the cord is attached has suffered a fall inducing on the tool a force reaching a predetermined threshold beyond which the tool must be revised.
  • Such indicator means may alternatively or in addition be obtained, in the first as in the second embodiment, by sizing at least one of the securing elements 15, 16 and/or at least one of the fixing plates 10 , 11 so that it (s) is (are) t plastically deformable (s) beyond a threshold of force undergone by a tool during a fall inducing that it must be revised.
  • the second securing element 16 may be two-tone: it may have a first color, for example green, over a first part of its length (placed on the side of the ball 60 when it is in a state of rest) and a second color, for example red, over a second part of its length.
  • a first color for example green
  • red for example

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
  • Emergency Lowering Means (AREA)

Description

1. Domaine de l'invention1. Field of the invention

Le domaine de l'invention est celui des dispositifs de retenue sécurisée pour outils portatifs.The field of the invention is that of secure retaining devices for portable tools.

2. Art antérieur2. Prior Art

Des outils portatifs, tels que des visseuses, des perceuses, des riveteuses ou autres, sont couramment utilisés par des opérateurs pour réaliser des travaux à plusieurs mètres de hauteur.Portable tools, such as screwdrivers, drills, riveters or the like, are commonly used by operators to carry out work at a height of several meters.

Dans ce cas, afin de sécuriser les sites d'intervention, les outils portatifs sont reliés à des dispositifs de retenue de sorte à retenir l'outil en cas de chute si l'opérateur relâche par mégarde l'outil, fait un faux mouvement ou une mauvaise manipulation.In this case, in order to secure the intervention sites, the portable tools are connected to retaining devices so as to retain the tool in the event of a fall if the operator inadvertently releases the tool, makes a false movement or mishandling.

De tels dispositifs de retenue permettent de garantir que l'outil ne tombe pas sur le sol et se détériore, et que l'outil ne heurte pas une machine ou une personne en dessous de la zone d'intervention de l'opérateur.Such restraint devices ensure that the tool does not fall to the ground and deteriorate, and that the tool does not strike a machine or a person below the operator's intervention area.

Il existe différents types de dispositifs de retenue.There are different types of retainers.

Le document US-A1-2013062498 décrit un dispositif de retenue comprenant un anneau d'amarrage fixé de manière rigide à l'outil au moyen d'une patte de fixation. Pour sécuriser la zone en cas de chute de l'outil, l'outil est relié à une structure fixe, comme un échafaudage, un bras support ou autre, au moyen d'un cordon de sécurité dont une extrémité est fixée à la structure fixe et l'autre extrémité est fixée à l'anneau d'amarrage solidaire de l'outil.The document US-A1-2013062498 describes a retaining device comprising a mooring ring fixed rigidly to the tool by means of a fixing lug. To secure the area in the event of the tool falling, the tool is connected to a fixed structure, such as scaffolding, a support arm or the like, by means of a safety cord, one end of which is fixed to the fixed structure. and the other end is fixed to the mooring ring integral with the tool.

Le document US-A1-20180132600 décrit un dispositif selon le préambule de la revendication 1. Pour sécuriser la zone en cas de chute de l'outil, l'outil est relié à une structure fixe au moyen d'un cordon de sécurité dont une extrémité est fixée à la structure fixe et l'autre extrémité est fixée à la boucle d'amarrage solidaire de l'outil.The document US-A1-20180132600 describes a device according to the preamble of claim 1. To secure the area in the event of the tool falling, the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is attached to the mooring loop attached to the tool.

Le document US-A1-2018/0084895 décrit un dispositif de retenue comprenant une sangle, portant un anneau d'amarrage, prévue pour être enroulée autour d'un outil. Pour sécuriser la zone en cas de chute de l'outil, l'outil est relié à une structure fixe au moyen d'un cordon de sécurité dont une extrémité est fixée à la structure fixe et l'autre extrémité est fixée à l'anneau d'amarrage solidaire de l'outil.The document US-A1-2018/0084895 describes a retaining device comprising a strap, carrying a mooring ring, intended to be wound around a tool. To secure the area in the event of the tool falling, the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is fixed to the ring mooring attached to the tool.

On connaît également des dispositifs de retenue comprenant une tôle fixée à l'outil et pliée pour former un point d'amarrage. Pour sécuriser la zone en cas de chute de l'outil, l'outil est relié à une structure fixe au moyen d'un cordon de sécurité dont une extrémité est fixée à la structure fixe et l'autre extrémité est fixée au point d'amarrage solidaire de l'outil.Retaining devices are also known comprising a sheet fixed to the tool and folded to form a mooring point. To secure the area in the event of the tool falling, the tool is connected to a fixed structure by means of a safety cord, one end of which is fixed to the fixed structure and the other end is fixed to the point of mooring attached to the tool.

La mise en œuvre de ces dispositifs permet de retenir l'outil, au bout d'une chute de plusieurs mètres, généralement trois à quatre mètres, le cordon de sécurité étant dimensionné pour stopper la chute de l'outil suffisamment haut par rapport au sol pour éviter qu'il ne heurte le sol et des machines ou des personnes situées sous la zone d'intervention de l'opérateur.The implementation of these devices makes it possible to retain the tool, after a fall of several meters, generally three to four meters, the safety cord being sized to stop the fall of the tool sufficiently high in relation to the ground. to prevent it from hitting the ground and machines or people below the operator's intervention zone.

Au cours d'une telle chute, l'outil accumule de l'énergie cinétique. L'arrêt de l'outil au bout de sa chute engendre un freinage brutal de celui-ci induisant l'encaissement pour l'outil d'un effort important. Cet effort est d'autant plus important que les dispositifs de retenue décrits ci-avant ne permettent pas d'amortir la chute de l'outil. En effet, ces dispositifs permettent de solidariser, de manière fixe, le cordon de sécurité à l'outil.During such a fall, the tool accumulates kinetic energy. The stopping of the tool at the end of its fall generates a sudden braking of the latter inducing the cashing for the tool of a significant effort. This effort is all the greater since the retaining devices described above do not make it possible to cushion the fall of the tool. Indeed, these devices make it possible to secure, in a fixed manner, the safety cord to the tool.

Compte tenu de ces efforts, il peut arriver que des pièces internes de l'outil se déplacent ou se brisent induisant la nécessité de pratiquer une campagne de maintenance pour réparer l'outil ce qui représente un poste de coût important.Given these efforts, it may happen that internal parts of the tool move or break, leading to the need to carry out a maintenance campaign to repair the tool, which represents a major cost item.

Dans le pire des cas, si le dispositif de retenue est insuffisamment dimensionné, il peut arriver qu'il se brise sous l'effet des efforts occasionnés par la chute de l'outil si bien que la chute de celui-ci jusqu'au sol ne peut être évitée induisant un risque important de détériorer l'outil et/ou son environnement de manière irréversible et d'occasionner des blessures chez une personne se trouvant sous la zone d'intervention.In the worst case, if the retaining device is insufficiently sized, it may break under the effect of the forces caused by the fall of the tool so that the fall of the latter to the ground cannot be avoided, leading to a significant risk of irreversibly damaging the tool and/or its environment and causing injury to a person located under the work area.

Le document US-A1-20170119137 décrit la mise en œuvre de deux petites pattes de fixation destinées à être solidarisées au carter d'un outil et reliées entre elles au moyen d'un ressort à spirale formant une boucle d'amarrage à un cordon de sécurité.The document US-A1-20170119137 describes the implementation of two small fixing lugs intended to be secured to the casing of a tool and connected to each other by means of a spiral spring forming a mooring loop to a safety cord.

Une telle technique permet d'amortir dans une certaine mesure la chute d'un outil et de réduire les efforts encaissés par celui-ci au cours de sa chute.Such a technique makes it possible to cushion the fall of a tool to a certain extent and to reduce the forces absorbed by the latter during its fall.

Le ressort mis en œuvre est toutefois relativement lourd. En outre, les petites pattes de fixation peuvent manquer de robustesse.The spring used is however relatively heavy. In addition, the small fixing brackets may lack robustness.

Par ailleurs, aucun des dispositifs de retenue de l'art antérieur ne permet de donner une orientation prédéterminée à un outil à l'issue de sa chute notamment pour limiter son encombrement par rapport à son environnement au cours ou à l'issue de sa chute.Furthermore, none of the retention devices of the prior art makes it possible to give a predetermined orientation to a tool at the end of its fall, in particular to limit its bulk with respect to its environment during or at the end of its fall. .

Les dispositifs de retenue d'outils portatifs peuvent ainsi encore être améliorés.Portable tool retainers can thus be further improved.

3. Objectifs de l'invention3. Objects of the invention

L'invention a notamment pour objectif d'apporter une solution efficace à au moins certains de ces différents problèmes.The object of the invention is in particular to provide an effective solution to at least some of these various problems.

En particulier, selon au moins un mode de réalisation, un objectif de l'invention est de fournir un dispositif de retenue d'outil portatif qui soit robuste.In particular, according to at least one embodiment, an object of the invention is to provide a portable tool retaining device which is robust.

Notamment, l'invention a pour objectif, selon au moins un mode de réalisation, de fournir un tel dispositif de retenue qui permet de préserver l'intégrité d'un outil portatif au cours de sa chute.In particular, the object of the invention, according to at least one embodiment, is to provide such a retaining device which makes it possible to preserve the integrity of a portable tool during its fall.

Un autre objectif de l'invention est, selon au moins un mode de réalisation, de fournir un tel dispositif de retenue qui permet de donner une orientation privilégiée à un outil en cours de chute.Another object of the invention is, according to at least one embodiment, to provide such a retaining device which makes it possible to give a privileged orientation to a tool during the fall.

Un autre objectif de l'invention est, selon au moins un mode de réalisation, de fournir un tel dispositif de retenue qui permet d'indiquer qu'un outil doit subir une révision si les efforts qu'il a subit au cours d'une chute dépassent un certain seuil.Another object of the invention is, according to at least one embodiment, to provide such a retaining device which makes it possible to indicate that a tool must undergo an overhaul if the forces it has undergone during a drop exceeds a certain threshold.

Un autre objectif de l'invention est, selon au moins un mode de réalisation, de fournir un tel dispositif de retenue qui soit léger.Another object of the invention is, according to at least one embodiment, to provide such a retaining device which is light.

Un autre objectif de l'invention est, selon au moins un mode de réalisation, de fournir un tel dispositif de retenue qui soit simple de conception et/ou économique.Another object of the invention is, according to at least one embodiment, to provide such a retaining device which is simple in design and/or economical.

4. Présentation de l'invention4. Presentation of the invention

Pour ceci, l'invention propose un ensemble de retenue apte à être fixé à un outil portatif pour permettre le raccordement d'un cordon de sécurité audit outil.For this, the invention proposes a retaining assembly capable of being fixed to a portable tool to allow the connection of a safety cord to said tool.

Selon l'invention, un tel ensemble comprend :

  • une première et une deuxième plaques de fixation aptes à être solidarisées audit outil portatif en enserrant le corps de celui-ci ;
  • un anneau apte à permettre l'accrochage dudit cordon ;
  • un premier et un deuxième éléments de solidarisation souples présentant chacun une extrémité solidaire dudit anneau et une extrémité respectivement solidaire de ladite première et de ladite deuxième plaques de fixation.
According to the invention, such a set comprises:
  • a first and a second fixing plates capable of being secured to said portable tool by enclosing the body of the latter;
  • a ring adapted to allow said cord to be attached;
  • a first and a second flexible securing elements each having an end secured to said ring and an end secured respectively to said first and said second fixing plates.

Ainsi, l'invention propose un ensemble de retenue particulièrement robuste notamment du fait de la mise en œuvre des plaques de fixation qui sont dimensionnées pour supporter les efforts dus à la chute d'un outil portatif destiné à être solidarisé à l'ensemble de retenue.Thus, the invention proposes a particularly robust retaining assembly, in particular due to the implementation of the fixing plates which are sized to withstand the forces due to the fall of a portable tool intended to be secured to the retaining assembly. .

Ainsi, au cours de la chute d'un outil portatif, le risque que l'ensemble de retenue ne rompe et que l'outil tombe au sol est nul ou à tout le moins extrêmement faible.Thus, during the fall of a portable tool, the risk that the retaining assembly will break and that the tool will fall to the ground is nil or at the very least extremely weak.

La zone située en dessous d'une zone d'intervention en hauteur est ainsi sécurisée si bien que le risque de détériorer des équipements qui pourraient s'y trouver ou de blesser des personnes qui pourrait y évoluer est très faible.The zone located below an intervention zone at height is thus made safe so that the risk of damaging equipment which might be there or of injuring people who might move there is very low.

Un tel ensemble de retenue peut notamment permettre la retenue sécurisée d'outils portatifs lourds ayant un poids compris entre 7 et 30 kg.Such a retaining assembly can in particular allow the secure retention of heavy portable tools having a weight of between 7 and 30 kg.

Selon une caractéristique possible, lesdits premier et deuxième éléments de solidarisation souples sont réalisés dans un matériau textile technique.According to one possible characteristic, said first and second flexible securing elements are made of a technical textile material.

De manière générale, un textile technique est un matériau constitué de fibres synthétiques ou naturelles possédant des propriétés spécifiques lui permettant d'être particulièrement adapté à un usage donné. En l'espèce, le textile technique choisi aura notamment des propriétés mécaniques lui permettant de résister aux efforts occasionnés par la chute d'un outil solidarisé à un ensemble de retenue selon l'invention.In general, a technical textile is a material made of synthetic or natural fibers with specific properties allowing it to be particularly suitable for a given use. In this case, the technical textile chosen will in particular have mechanical properties allowing it to resist the forces caused by the fall of a tool secured to a retaining assembly according to the invention.

Un textile technique présente l'avantage d'être léger. En outre, il peut être dimensionné pour supporter des efforts importants sans grande incidence sur son poids. Les éléments de solidarisation souples en matériau textile technique permettent ainsi de garantir une retenue robuste tout en gardant un poids global de l'ensemble de retenue qui reste faible.A technical textile has the advantage of being light. In addition, it can be dimensioned to support significant efforts without significant impact on its weight. The flexible fastening elements made of technical textile material thus make it possible to guarantee robust restraint while keeping the overall weight of the restraint assembly which remains low.

Un ensemble de retenue selon l'invention présente ainsi l'avantage d'être très robuste tout en restant léger.
Selon une caractéristique possible, les longueurs desdits premier et deuxième éléments de solidarisation sont choisies afin de placer ledit élément d'ancrage par rapport au centre de gravité dudit outil auquel ledit ensemble est destiné à être fixé de sorte à donner une orientation prédéterminée audit outil lorsqu'il est suspendu audit cordon par ledit ensemble de retenue.A restraint assembly according to the invention thus has the advantage of being very robust while remaining light.
According to a possible characteristic, the lengths of said first and second securing elements are chosen in order to place said anchoring element with respect to the center of gravity of said tool to which said assembly is intended to be fixed so as to give a predetermined orientation to said tool when it is suspended from said cord by said retaining assembly.

Selon une caractéristique possible, les longueurs desdits premier et deuxième éléments de solidarisation sont choisies de sorte à placer ledit élément d'ancrage le long d'un axe vertical passant par le centre de gravité dudit outil auquel ledit ensemble est destiné à être fixé lorsque ledit ensemble est maintenu essentiellement horizontalement.According to one possible characteristic, the lengths of said first and second securing elements are chosen so as to place said anchoring element along a vertical axis passing through the center of gravity of said tool to which said assembly is intended to be fixed when said assembly is held essentially horizontally.

Ceci permet de placer l'outil sensiblement en équilibre par rapport à son centre de gravité lorsqu'il est suspendu. Si l'outil est par exemple linéaire, il aura tendance à se placer tel que son axe longitudinal soit sensiblement horizontal.
Selon une caractéristique possible, les longueurs desdits premier et deuxième éléments de solidarisation sont choisies de sorte à placer ledit élément d'ancrage le long d'un axe vertical situé d'un côté ou de l'autre du centre de gravité dudit outil auquel ledit ensemble est destiné à être fixé lorsque ledit ensemble est maintenu essentiellement horizontalement.This makes it possible to place the tool substantially in equilibrium with respect to its center of gravity when it is suspended. If the tool is for example linear, it will tend to position itself such that its longitudinal axis is substantially horizontal.
According to a possible characteristic, the lengths of said first and second securing elements are chosen so as to place said anchoring element along a vertical axis located on one side or the other of the center of gravity of said tool at which said assembly is intended to be fixed when said assembly is held essentially horizontally.

Ceci permet de faire basculer l'outil par rapport à son centre de gravité. Si l'outil est par exemple linéaire, il aura tendance à se placer tel que son axe longitudinal soit sensiblement vertical ou incliné par rapport à la verticale.
Selon une caractéristique possible, ladite orientation prédéterminée est telle que le projeté sur le sol dudit outil auquel ledit ensemble est destiné à être fixé a la plus faible surface possible.This allows the tool to tilt relative to its center of gravity. If the tool is for example linear, it will tend to position itself such that its longitudinal axis is substantially vertical or inclined with respect to the vertical.
According to one possible characteristic, said predetermined orientation is such that the projection on the ground of said tool to which said assembly is intended to be fixed has the smallest possible surface.

On réduit ainsi l'encombrement de l'outil lorsqu'il est suspendu après une chute si bien qu'on limite le risque qu'il endommage son environnement ou des personnes se trouvant en dessous de la zone de travail.This reduces the bulk of the tool when it is suspended after a fall, so that the risk of it damaging its environment or people located below the work area is limited.

Selon une caractéristique possible, les longueurs desdits premier et deuxième éléments de solidarisation sont déterminées de sorte à ce que la plus grande dimension dudit outil auquel ledit ensemble est destiné à être fixé s'étende essentiellement parallèlement à l'axe longitudinal du cordon lorsque ledit ensemble est suspendu audit cordon.According to a possible characteristic, the lengths of said first and second securing elements are determined so that the largest dimension of said tool to which said assembly is intended to be fixed extends essentially parallel to the longitudinal axis of the cord when said assembly is suspended from said cord.

L'outil suspendu s'étend alors tel que son axe longitudinal soit essentiellement vertical.The suspended tool then extends such that its longitudinal axis is essentially vertical.

Selon un caractéristique possible, les longueurs desdits premier et deuxième éléments de solidarisation sont déterminées de sorte à ce que la tête dudit outil auquel ledit ensemble est destiné à être fixé soit orientée vers le bas lorsque ledit ensemble est suspendu audit cordon.According to one possible characteristic, the lengths of said first and second fastening elements are determined so that the head of said tool to which said assembly is intended to be fixed is oriented downwards when said assembly is suspended from said cord.

Selon une caractéristique possible, un ensemble selon l'invention comprend des moyens d'amortissement aptes à amortir la chute d'un outil solidarisé audit ensemble suspendu dudit cordon.According to one possible characteristic, an assembly according to the invention comprises damping means capable of damping the fall of a tool secured to said assembly suspended from said cord.

Ceci permet de limiter les effort encaissés par un outil au cours de sa chute et ainsi de préserver son intégrité.This makes it possible to limit the forces absorbed by a tool during its fall and thus to preserve its integrity.

Selon une caractéristique possible, un ensemble selon l'invention comprend des moyens indicateurs indiquant qu'un outil fixé audit ensemble de retenue suspendu audit cordon a subi une chute induisant sur ledit outil une force atteignant un seuil prédéterminé au-delà duquel ledit outil doit être révisé.According to one possible characteristic, an assembly according to the invention comprises indicator means indicating that a tool fixed to said retaining assembly suspended from said cord has suffered a fall inducing on said tool a force reaching a predetermined threshold beyond which said tool must be revised.

Un opérateur peut ainsi facilement détecter qu'un outil a subi au cours de sa chute des efforts tels qu'il doit être réparé. Ceci permet de réaliser une campagne de maintenance de l'outil seulement lorsqu'elle est nécessaire et d'éviter de continuer d'utiliser un outil qui pourrait être partiellement défectueux.An operator can thus easily detect that a tool has undergone such forces during its fall that it must be repaired. This makes it possible to carry out a maintenance campaign of the tool only when it is necessary and to avoid continuing to use a tool which could be partially defective.

Selon une caractéristique possible, au moins un desdits premier et deuxième éléments de solidarisation est déformable élastiquement.According to one possible characteristic, at least one of said first and second securing elements is elastically deformable.

Ceci permet de constituer facilement un moyen d'amortissement.This makes it possible to easily constitute a damping means.

Selon une caractéristique possible, au moins un desdits premier et deuxième éléments de solidarisation est déformable plastiquement au-delà dudit seuil.According to a possible characteristic, at least one of said first and second securing elements is plastically deformable beyond said threshold.

Ainsi, dès qu'au cours de la chute d'un outil, les efforts subis par celui-ci atteignent ou dépassent un seuil d'effort prédéterminé, au moins un des éléments de solidarisation se déforme de manière irréversible. Un opérateur peut alors facilement repérer visuellement qu'un outil a subi au cours de sa chute des efforts tels qu'il doit être réparé.Thus, as soon as during the fall of a tool, the forces undergone by the latter reach or exceed a predetermined force threshold, at least one of the securing elements deforms irreversibly. An operator can then easily identify visually that a tool has undergone such forces during its fall that it must be repaired.

Selon une caractéristique possible, au moins une desdites première et deuxième plaques de fixation est déformable plastiquement au-delà dudit seuil.According to a possible characteristic, at least one of said first and second fixing plates is plastically deformable beyond said threshold.

Ainsi, dès qu'au cours de la chute d'un outil, les efforts subis par celui-ci atteignent ou dépasse un seuil d'effort prédéterminé, au moins une des plaques de fixation se déforme de manière irréversible. Un opérateur peut alors facilement repérer visuellement qu'un outil a subi au cours de sa chute des efforts tels qu'il doit être réparé.Thus, as soon as during the fall of a tool, the forces undergone by the latter reach or exceed a predetermined force threshold, at least one of the fixing plates deforms irreversibly. An operator can then easily identify visually that a tool has undergone such forces during its fall that it must be repaired.

Selon une caractéristique possible, au moins un desdits éléments de solidarisation peut prendre :

  • un état de repos dans lequel il est au moins en partie replié en accordéon, chacun des plis étant traversé par un trou, lesdits trous s'étendant essentiellement le long d'un même axe et étant tous traversés par un élément de retenue dont une première extrémité est solidarisée audit élément d'ancrage et l'autre extrémité dite d'amortissement présentant une section supérieure à celle desdits trous, et
  • un état final pris après la chute d'un outil solidarisé audit ensemble suspendu à l'extrémité dudit cordon, chute au cours de laquelle ladite extrémité d'amortissement passe à travers au moins un desdits trous en freinant la chute dudit outil par friction sur les bords dudit au moins un trou lorsqu'un seuil de tension prédéterminé sur ledit cordon est atteint.
According to a possible characteristic, at least one of said securing elements can take:
  • a state of rest in which it is at least partly folded like an accordion, each of the folds being crossed by a hole, the said holes extending essentially along the same axis and being all crossed by a retaining element, a first of which end is secured to said anchoring element and the other so-called damping end having a section greater than that of said holes, and
  • a final state taken after the fall of a tool secured to said assembly suspended at the end of said cord, fall during which said damping end passes through at least one of said holes by slowing the fall of said tool by friction on the edges of said at least one hole when a predetermined voltage threshold on said bead is reached.

Ceci est une solution simple et efficace pour amortir la chute d'un outil et ainsi préserver son intégrité.This is a simple and effective solution to cushion the fall of a tool and thus preserve its integrity.

Selon une caractéristique possible, chacun desdits trous est entouré par un oeillet et ladite extrémité d'amortissement est réalisée dans une matière élastiquement déformable.According to one possible characteristic, each of said holes is surrounded by an eyelet and said damping end is made of an elastically deformable material.

Selon une caractéristique possible, lesdits trous et ladite extrémité d'amortissement sont dimensionnés de telle sorte que ledit seuil de force prédéterminé subi par ledit outil au cours d'une chute au-delà duquel ledit outil doit être révisé est atteint après que ladite extrémité d'amortissement ait passé un nombre minimum prédéterminé de trous.According to a possible characteristic, said holes and said damping end are dimensioned such that said predetermined force threshold undergone by said tool during a fall beyond which said tool must be revised is reached after said end d damping has passed a predetermined minimum number of holes.

Cette solution permet également de visualiser si un outil a subi au cours d'une chute un effort dépassant un seuil d'effort au-delà duquel il doit être réparé en regardant le nombre de trous à travers lesquels l'extrémité d'amortissement est passée au cours d'une chute.This solution also makes it possible to visualize if a tool has undergone during a fall a force exceeding a force threshold beyond which it must be repaired by looking at the number of holes through which the damping end has passed during a fall.

5. Description des figures5. Description of figures

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante de modes de réalisation particuliers, donnée à titre de simple exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • [Fig 1] la figure 1 illustre une vue en perspective d'un ensemble de retenue selon un premier mode de réalisation de l'invention ;
  • [Fig 2] la figure 2 illustre une vue de face de l'ensemble de retenue de la figure 1 ;
  • [Fig 3] la figure 3 illustre une vue de face de l'ensemble des figures précédentes auquel un outil est solidarisé et maintenu en position horizontale alors que le cordon s'étend verticalement ;
  • [Fig 4] la figure 4 illustre une vue de face de l'ensemble de la figure 3 après chute de l'outil ;
  • [Fig 5] la figure 5 illustre une vue en perspective d'un ensemble de retenue selon un deuxième mode de réalisation de l'invention ;
  • [Fig 6] la figure 6 illustre une vue de face de l'ensemble de retenue de la figure 5 ;
  • [Fig 7] la figure 7 illustre une vue de face de l'ensemble des figures 5 et 6 auquel un outil est solidarisé et maintenu en position horizontale alors que le cordon s'étend verticalement ;
  • [Fig 8] la figure 8 illustre une vue de face de l'ensemble de la figure 7 après chute de l'outil ;
  • [Fig 9] la figure 9 illustre une vue en perspective d'un élément de solidarisation souple de l'ensemble de retenue illustré aux figures 5 à 8.
Other characteristics and advantages of the invention will appear on reading the following description of particular embodiments, given by way of a simple illustrative and non-limiting example, and the appended drawings, among which:
  • [ Fig 1 ] the figure 1 illustrates a perspective view of a restraint assembly according to a first embodiment of the invention;
  • [ Fig 2 ] the figure 2 illustrates a front view of the retainer assembly of the figure 1 ;
  • [ Fig.3 ] the picture 3 illustrates a front view of all of the preceding figures to which a tool is secured and held in a horizontal position while the cord extends vertically;
  • [ Fig 4 ] the figure 4 illustrates a front view of the entire picture 3 after tool drop;
  • [ Fig.5 ] the figure 5 illustrates a perspective view of a restraint assembly according to a second embodiment of the invention;
  • [ Fig 6 ] the figure 6 illustrates a front view of the retainer assembly of the figure 5 ;
  • [ Fig 7 ] the figure 7 illustrates a front view of all the figure 5 and 6 to which a tool is secured and held in a horizontal position while the cord extends vertically;
  • [ Fig.8 ] the figure 8 illustrates a front view of the entire figure 7 after tool drop;
  • [ Fig.9 ] the figure 9 illustrates a perspective view of a flexible fastening element of the restraint assembly shown in figures 5 to 8 .

6. Description de modes de réalisation particuliers6. Description of particular embodiments 6.1. Premier mode de réalisation6.1. First embodiment 6.1.1. Architecture6.1.1. Architecture

On présente en relation avec les figures 1 à 4 un premier mode de réalisation d'un ensemble de retenue selon l'invention.We present in relation to the figures 1 to 4 a first embodiment of a restraint assembly according to the invention.

Ainsi que cela est représenté, un tel ensemble de retenue 1 comprend une première 10 et une deuxième 11 plaques de fixation.As shown, such a restraint assembly 1 comprises a first 10 and a second 11 fixing plates.

Ces plaques de fixation 10, 11 sont aptes à être solidarisées à un outil portatif en enserrant le corps de celui-ci, comme cela ressortira plus clairement par la suite.These fixing plates 10, 11 are suitable for being secured to a portable tool by enclosing the body of the latter, as will emerge more clearly subsequently.

Ces plaques de fixation 10, 11 sont préférentiellement réalisées dans un matériau métallique comme par exemple de l'acier ou autre. Elles pourraient alternativement être réalisées dans un matériau plastique, notamment dans un matériau composite.These fixing plates 10, 11 are preferably made of a metallic material such as, for example, steel or the like. They could alternatively be made of a plastic material, in particular of a composite material.

Quoi qu'il en soit, les plaques de fixation 10, 11 seront dimensionnées pour résister aux efforts dus à la chute sur une hauteur prédéterminée d'un outil portatif solidarisé à l'ensemble de retenue.Be that as it may, the fixing plates 10, 11 will be sized to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.

Les plaques de fixation 10, 11 présentent ici essentiellement la forme d'un « U », c'est-à-dire une forme présentant un profil ouvert, essentiellement comme une fourche, pour faciliter la mise en place des plaques autour du corps d'un outil portatif. Elles pourraient présenter une autre forme, notamment un contour fermé de forme essentiellement rectangulaire ce qui rend néanmoins leur mise en place sur le corps d'un outil portatif moins aisée.The fixing plates 10, 11 here essentially have the shape of a "U", that is to say a shape having an open profile, essentially like a fork, to facilitate the installation of the plates around the body of a portable tool. They could have another shape, in particular a closed contour of essentially rectangular shape, which nevertheless makes them less easy to put in place on the body of a portable tool.

Les plaques de fixation 10, 11 sont traversées par des trous 101, 111 permettant le passage de vis de fixation 13 afin de solidariser les plaques de fixation 10, 11 au corps d'un outil portatif.The fixing plates 10, 11 are traversed by holes 101, 111 allowing the passage of fixing screws 13 in order to secure the fixing plates 10, 11 to the body of a portable tool.

Ces vis 13 seront également dimensionnées pour résister aux efforts dus à la chute sur une hauteur prédéterminée d'un outil portatif solidarisé à l'ensemble de retenue.These screws 13 will also be sized to withstand the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.

L'ensemble de retenue comprend un élément d'ancrage prenant ici la forme d'un anneau 14. Il pourra alternativement s'agir d'un crochet ou autre.The restraint assembly comprises an anchoring element here taking the form of a ring 14. It could alternatively be a hook or the like.

Ainsi qu'il sera décrit plus en détail par la suite, un tel anneau 14 est apte à permettre l'accrochage d'un cordon de sécurité encore appelé cordon de retenue. Pour cela, l'anneau 14 est traversé par un trou 142. Un tel cordon de sécurité permet de raccrocher l'ensemble de retenue, et l'outil qui y est solidarisé, à une structure fixe située en hauteur comme par exemple un échafaudage, un portique, une nacelle ou autre.As will be described in more detail below, such a ring 14 is capable of allowing the attachment of a safety cord also called retaining cord. For this, the ring 14 is crossed by a hole 142. Such a safety cord makes it possible to hang up the retaining assembly, and the tool which is secured thereto, to a fixed structure located at height such as for example a scaffolding, a gantry, a nacelle or other.

Cet anneau 14 est préférentiellement réalisé dans un matériau métallique comme de l'acier ou autre. Il pourra alternativement être réalisé dans un matériau plastique, notamment dans un matériau composite.This ring 14 is preferably made of a metallic material such as steel or the like. It may alternatively be made of a plastic material, in particular of a composite material.

Quoi qu'il en soit, l'anneau 14 sera dimensionné pour résister aux efforts dus à la chute sur une hauteur prédéterminée d'un outil portatif solidarisé à l'ensemble de retenue.Be that as it may, the ring 14 will be sized to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly.

L'ensemble de retenue comprend en outre un premier 15 et un deuxième 16 éléments de solidarisation souples permettant de rendre solidaire l'anneau 14 des plaques de fixation 10, 11.The retaining assembly further comprises a first 15 and a second 16 flexible securing elements making it possible to make the ring 14 integral with the fixing plates 10, 11.

Pour cela, chaque élément de solidarisation 15, 16 est relié à l'une de ses extrémité à l'anneau 14 et à l'autre de ses extrémités respectivement à la première plaque de fixation 10 et à la deuxième plaque de fixation 11.For this, each securing element 15, 16 is connected at one of its ends to the ring 14 and at the other of its ends respectively to the first fixing plate 10 and to the second fixing plate 11.

L'anneau 14 présente pour cela deux fentes 140 à contour fermé permettant l'introduction de l'extrémité correspondante des éléments de solidarisation 15, 16 et délimitant des tiges de fixation 141.The ring 14 therefore has two slots 140 with a closed contour allowing the introduction of the corresponding end of the securing elements 15, 16 and delimiting the fixing rods 141.

La solidarisation d'un élément de solidarisation 15, 16 à l'anneau 14 est obtenue en introduisant la première extrémité libre 151, 161 correspondante de l'élément de solidarisation 15, 16 dans la fente 140 correspondante de l'anneau 14. L'extrémité libre 151, 161 est ensuite enroulée autour de la tige de fixation 141 pour former une boucle autour de celle-ci. Enfin, l'extrémité libre 151, 161 est solidarisée au corps 150, 160 de l'élément de solidarisation 15, 16 correspondant. Cette solidarisation est préférentiellement réalisée au moyen de coutures. Bien entendu, toute autre solution de fixation adaptée pourra être mise en œuvre comme notamment le soudage ou le collage.The attachment of an attachment element 15, 16 to the ring 14 is obtained by introducing the corresponding first free end 151, 161 of the fastening element 15, 16 into the corresponding slot 140 of the ring 14. The free end 151, 161 is then wound around the fixing rod 141 to form a loop around it. Finally, the free end 151, 161 is secured to the body 150, 160 of the corresponding securing element 15, 16. This connection is preferably made by means of seams. Of course, any other suitable fixing solution can be implemented, such as welding or gluing in particular.

La solidarisation entre chaque élément de solidarisation 15, 16 et l'anneau 14 est dimensionnée de telle sorte qu'elle soit irréversible et pour résister aux efforts dus à la chute sur une hauteur prédéterminée d'un outil portatif solidarisé à l'ensemble de retenue.The attachment between each attachment element 15, 16 and the ring 14 is dimensioned such that it is irreversible and to resist the forces due to the fall over a predetermined height of a portable tool secured to the retaining assembly. .

La liaison entre chaque élément de solidarisation 15, 16 et l'anneau 14 constitue essentiellement une liaison pivot dont l'axe est essentiellement confondu avec l'axe longitudinal de la tige de fixation 141 correspondante.The connection between each securing element 15, 16 and the ring 14 essentially constitutes a pivot connection, the axis of which essentially coincides with the longitudinal axis of the corresponding fixing rod 141.

Les plaques de fixation 10, 11 sont chacune traversées par une fente 102, 112 à contour fermé permettant l'introduction de l'extrémité correspondante des éléments de solidarisation 15, 16 et délimitant des tiges de fixation 103, 113.The fixing plates 10, 11 are each traversed by a slot 102, 112 with a closed contour allowing the introduction of the corresponding end of the securing elements 15, 16 and delimiting the fixing rods 103, 113.

La solidarisation d'un élément de solidarisation 15, 16 à une plaque de fixation 10, 11 est respectivement obtenue en introduisant la deuxième extrémité libre 152, 162 correspondante de l'élément de solidarisation 15, 16 dans la fente 102, 112 correspondante d'une plaque de fixation 10, 11. L'extrémité libre 152, 162 est ensuite enroulée autour de la tige de fixation 103, 113 pour former une boucle autour de celle-ci. Enfin, l'extrémité libre 152, 162 est solidarisée au corps 150, 160 de l'élément de solidarisation 15, 16 correspondant. Cette solidarisation est préférentiellement réalisée au moyen de coutures. Bien entendu, toute autre solution de fixation adaptée pourra être mise en œuvre comme notamment le soudage ou le collage.The fastening of a fastening element 15, 16 to a fixing plate 10, 11 is respectively obtained by introducing the corresponding second free end 152, 162 of the fastening element 15, 16 into the slot 102, 112 corresponding to a fixing plate 10, 11. The free end 152, 162 is then wrapped around the fixing rod 103, 113 to form a loop around the latter. Finally, the free end 152, 162 is secured to the body 150, 160 of the corresponding securing element 15, 16. This connection is preferably made by means of seams. Of course, any other suitable fixing solution can be implemented, such as welding or gluing in particular.

La solidarisation entre chaque élément de solidarisation 15, 16 et chaque plaque de fixation 10, 11 est dimensionnée de telle sorte qu'elle soit irréversible et pour résister aux efforts dus à la chute sur une hauteur prédéterminée d'un outil portatif solidarisé à l'ensemble de retenue.The attachment between each attachment element 15, 16 and each fixing plate 10, 11 is dimensioned such that it is irreversible and to withstand the forces due to the fall over a predetermined height of a portable tool secured to the restraint assembly.

La liaison entre chaque élément de solidarisation 15, 16 et chaque plaque de fixation 10, 11 constitue ainsi essentiellement une liaison pivot dont l'axe est essentiellement confondu avec l'axe longitudinal de la tige de fixation 103, 113 correspondante.The connection between each securing element 15, 16 and each fixing plate 10, 11 thus essentially constitutes a pivot connection whose axis is essentially coincides with the longitudinal axis of the corresponding fixing rod 103, 113.

Les éléments de solidarisation 15, 16 sont préférentiellement réalisés dans un matériau textile technique.The securing elements 15, 16 are preferably made of a technical textile material.

De manière générale, un textile technique est un matériau constitué de fibres synthétiques ou naturelles possédant des propriétés spécifiques lui permettant d'être particulièrement adapté à un usage donné. En l'espèce, le textile technique choisi aura notamment des propriétés mécaniques lui permettant de résister aux efforts occasionnés par la chute d'un outil solidarisé à un ensemble de retenue selon l'invention.In general, a technical textile is a material made of synthetic or natural fibers with specific properties allowing it to be particularly suitable for a given use. In this case, the technical textile chosen will in particular have mechanical properties allowing it to resist the forces caused by the fall of a tool secured to a retaining assembly according to the invention.

Le textile technique pourra par exemple être un tricot, un tissu, un non-tissé, une corde, une tresse ou autre.The technical textile may for example be a knit, a fabric, a non-woven, a rope, a braid or the like.

Les fibres le composant seront préférentiellement non métalliques.The fibers composing it will preferably be non-metallic.

Il s'agit de préférence de fibres de nylon. Néanmoins, tout autre matériau apte à former des fibres et à résister à de fortes contraintes mécaniques pourrait être envisagé.They are preferably nylon fibers. Nevertheless, any other material capable of forming fibers and of resisting high mechanical stresses could be envisaged.

Il pourra par exemple s'agir d'un matériau du type sangle d'arrimage ou sangle de ceinture de sécurité automobile.It may, for example, be a material of the tie-down strap type or automobile seat belt strap.

Un textile technique présente l'avantage d'être léger. En outre, il peut être dimensionné pour supporter des efforts importants sans grande incidence sur son poids. Les éléments de solidarisation souples en matériau textile technique permettent ainsi de garantir une retenue robuste tout en gardant un poids global de l'ensemble de retenue qui reste faible.A technical textile has the advantage of being light. In addition, it can be dimensioned to support significant efforts without significant impact on its weight. The flexible fastening elements made of technical textile material thus make it possible to guarantee robust restraint while keeping the overall weight of the restraint assembly which remains low.

Les platines de fixation pourront être communes à plusieurs types d'outils alors que les éléments de solidarisation pourront être adaptées d'un type d'outil à un autre en fonction des efforts occasionnés par la chute du type d'outil supporté. On obtient ainsi une grande modularité par une utilisation commune de platines de fixations identiques pour différents types d'outil. Bien entendu, les platines de fixation seront communes à plusieurs types d'outil dans la limite d'être capables de résister aux efforts occasionnés par la chute du type d'outil supporté. Sinon, elles seront dimensionnées pour résister aux efforts occasionnés par la chute du type d'outil supporté.The fixing plates may be common to several types of tools while the securing elements may be adapted from one type of tool to another depending on the forces caused by the fall of the type of tool supported. A great modularity is thus obtained by a common use of identical fixing plates for different types of tool. Of course, the fixing plates will be common to several types of tool insofar as they are capable of withstanding the forces caused by the fall of the type of tool supported. Otherwise, they will be dimensioned to resist the forces caused by the fall of the type of tool supported.

Dans d'autres variantes, l'un au moins des éléments de solidarisation 15, 16 pourra être réalisé dans un matériau au moins en partie élastique, comme par exemple un élastomère ou autre. Dans ce cas, la déformation élastique de l'élément de solidarisation correspondant permettra d'amortir la chute d'un outil fixé à l'ensemble de retenue suspendu à un cordon de sécurité. Cet amortissement permettra de préserver l'outil d'avarie.In other variants, at least one of the securing elements 15, 16 may be made of a material that is at least partly elastic, such as for example an elastomer or the like. In this case, the elastic deformation of the element of corresponding attachment will cushion the fall of a tool attached to the restraint system suspended from a safety cord. This damping will preserve the tool from damage.

Les axes des liaisons pivot entre les éléments de solidarisation 15, 16 et l'anneau 14 d'une part et les plaques de fixation 10, 11 d'autre part sont de préférence essentiellement parallèles à l'axe longitudinal du trou 142 de l'anneau 14. Dans des variantes, ils pourraient ne pas être essentiellement parallèles mais être essentiellement orthogonaux à l'axe longitudinal du trou 142 de l'anneau 14.The axes of the pivot connections between the fastening elements 15, 16 and the ring 14 on the one hand and the fixing plates 10, 11 on the other hand are preferably essentially parallel to the longitudinal axis of the hole 142 of the ring 14. In variants, they could not be essentially parallel but be essentially orthogonal to the longitudinal axis of the hole 142 of the ring 14.

Les premier 15 et deuxième 16 éléments de solidarisation présentent préférentiellement des longueurs différentes. Comme cela sera expliqué plus en détail par la suite, cela permet de placer l'anneau 14 d'un côté ou de l'autre du centre de gravité G d'un outil 3 auquel l'ensemble de retenue est destiné à être fixé lorsque le cordon 14 est maintenu essentiellement verticalement et que l'axe longitudinal A de l'outil 3 est maintenu essentiellement horizontalement (cf. figure 3).The first 15 and second 16 securing elements preferably have different lengths. As will be explained in more detail later, this allows the ring 14 to be placed on one side or the other of the center of gravity G of a tool 3 to which the retaining assembly is intended to be fixed when the cord 14 is maintained essentially vertically and the longitudinal axis A of the tool 3 is maintained essentially horizontally (cf. picture 3 ).

Comme il ressortira plus clairement par la suite, la longueur des premier 15 et deuxième 16 éléments de solidarisation est préférentiellement déterminée de sorte à ce que l'axe longitudinal A de l'outil 3 auquel l'ensemble de retenue est destiné à être fixé s'étende essentiellement parallèlement à l'axe longitudinal B du cordon 14 lorsque l'ensemble de retenue est suspendu au cordon 14 (cf. figure 4). On entend par essentiellement parallèlement que l'angle d'inclinaison α entre les axes A et B pourra par exemple être compris entre 0 et 15°.As will emerge more clearly subsequently, the length of the first 15 and second 16 securing elements is preferably determined so that the longitudinal axis A of the tool 3 to which the retaining assembly is intended to be fixed s extends essentially parallel to the longitudinal axis B of the cord 14 when the restraint assembly is suspended from the cord 14 (cf. figure 4 ). Essentially parallel means that the angle of inclination α between the axes A and B may for example be between 0 and 15°.

Comme il ressortira également plus clairement par la suite, la longueur des premier 15 et deuxième 16 éléments de solidarisation est déterminée de sorte à ce que la tête 31 de l'outil 3 (partie portant un outil de travail comme un foret, une fraise, une douille de vissage ou autre...) auquel l'ensemble de retenue est destiné à être fixé soit orientée vers le bas, c'est-à-dire vers le sol, lorsque l'ensemble de retenue est suspendu au cordon.As will also emerge more clearly subsequently, the length of the first 15 and second 16 securing elements is determined so that the head 31 of the tool 3 (part carrying a working tool such as a drill, a milling cutter, a screw socket or other...) to which the retaining assembly is intended to be fixed is oriented downwards, that is to say towards the ground, when the retaining assembly is suspended from the cord.

6.1.2. Fonctionnement6.1.2. Functioning

On présente en relation avec les figures 3 et 4 la mise en œuvre d'un ensemble de retenue selon le premier mode de réalisation.We present in relation to the figure 3 and 4 the implementation of a restraint assembly according to the first embodiment.

Le corps 30 de l'outil portatif 3 qu'il est souhaité de solidariser à l'ensemble de retenue est inséré à l'intérieur des plaques de fixation 10, 11 par leur ouverture. Les plaques de fixation 10, 11 sont ensuite solidarisées au corps 30 au moyen des vis 13.The body 30 of the portable tool 3 which it is desired to secure to the retaining assembly is inserted inside the fixing plates 10, 11 through their opening. The fixing plates 10, 11 are then secured to the body 30 by means of the screws 13.

Le corps 30 se trouve alors enserré entre les deux plaques de fixation 10, 11.The body 30 is then clamped between the two fixing plates 10, 11.

Un crochet 4 solidarisé à une extrémité du cordon de sécurité 2 est ensuite passé à travers le trou 142 de l'anneau 14.A hook 4 secured to one end of the safety cord 2 is then passed through the hole 142 of the ring 14.

L'autre extrémité du cordon 2 est fixée à une structure fixe comme ici un portique 5 (partiellement représenté).The other end of cord 2 is fixed to a fixed structure such as here a gantry 5 (partially shown).

Le portique 5 est placé en hauteur au niveau de la zone d'intervention de l'opérateur.The gantry 5 is placed in height at the level of the intervention zone of the operator.

La longueur du cordon 2 est choisie en fonction de la hauteur de la zone d'intervention par rapport au sol. Elle est choisie de sorte que lorsqu'un outil portatif se trouve suspendu au cordon après avoir chuté, il se trouve suffisamment haut par rapport à la surface du sol pour ne pas heurter une personne ou un équipement se trouvant sous la zone d'intervention.The length of cord 2 is chosen according to the height of the intervention zone relative to the ground. It is chosen so that when a portable tool is suspended from the cord after having fallen, it is high enough in relation to the surface of the ground not to hit a person or equipment located under the intervention zone.

Lorsqu'un opérateur travaille en hauteur et laisse par mégarde tomber l'outil 3, celui-ci chute dans la limite de la longueur du cordon 2. Une fois que la hauteur de chute est telle que le cordon est tendu, l'outil 3 s'oriente naturellement (sous l'effet de la gravité) dans une position privilégiée imposée par la position relative du centre de gravité G de l'outil et de l'anneau 14.When an operator is working at height and inadvertently drops tool 3, it falls within the limit of the length of cord 2. Once the fall height is such that the cord is taut, tool 3 orients itself naturally (under the effect of gravity) in a privileged position imposed by the relative position of the center of gravity G of the tool and of the ring 14.

Dans ce mode de réalisation, la position privilégiée de l'outil 3 est telle que son axe longitudinal A se trouve essentiellement parallèle, ou faiblement incliné, par rapport à l'axe B du cordon s'étendant verticalement, et que sa tête 31 se trouve orientée vers le sol.In this embodiment, the privileged position of the tool 3 is such that its longitudinal axis A is essentially parallel, or slightly inclined, with respect to the axis B of the cord extending vertically, and that its head 31 is is oriented towards the ground.

L'outil se trouve alors dans une position dans laquelle il prend le moins de place vis-à-vis de son environnement.The tool is then in a position in which it takes up the least space vis-à-vis its environment.

Bien entendu, selon la forme du corps de l'outil, l'orientation privilégiée qu'il devra prendre en fin de chute pour prendre le moins de place vis-à-vis de son environnement pourra être différente.Of course, depending on the shape of the body of the tool, the preferred orientation that it will have to take at the end of the drop to take up the least space vis-à-vis its environment may be different.

De manière préférentielle, l'orientation privilégiée de l'outil à l'issue de la chute est telle que la surface projetée de l'outil sur le sol soit la plus réduite possible afin de réduire le risque de collision avec son environnement. Ainsi, il s'agit de l'orientation dans laquelle la plus grande dimension de l'outil (longueur, largeur ou hauteur) est essentiellement parallèle à l'axe B du cordon s'étendant verticalement lorsque l'outil est fixé au dispositif de retenue et suspendu au cordon.Preferably, the preferred orientation of the tool after the fall is such that the projected surface of the tool on the ground is as small as possible in order to reduce the risk of collision with its environment. Thus, this is the orientation in which the tool's greatest dimension (length, width, or height) is substantially parallel to the B-axis of the cord extending vertically when the tool is attached to the device. restrained and suspended from the cord.

Si le risque de collision avec l'environnement est réduit, l'orientation privilégiée peut également être telle que la plus grande dimension de l'outil s'étende essentiellement perpendiculairement par rapport à la verticale lorsque l'outil est fixé au dispositif de retenue et suspendu au cordon. Dans ce cas, l'anneau est placé le long d'un axe vertical passant par le centre de gravité de l'outil lorsque le dispositif de retenu est maintenu horizontalement.If the risk of collision with the environment is reduced, the preferred orientation may also be such that the longest dimension of the tool extends substantially perpendicular to the vertical when the tool is attached to the retainer and hanging from the cord. In this case, the ring is placed along a vertical axis passing through the center of gravity of the tool when the retainer is held horizontally.

Dans la variante selon laquelle au moins un des premier 15 et deuxième 16 éléments de solidarisation est au moins en partie élastique, celui-ci se déformera élastiquement au cours de la chute de l'outil de manière à l'amortir. On limite ainsi les efforts subis par l'outil au cours de sa chute de façon à préserver son intégrité et à éviter sa détérioration.In the variant according to which at least one of the first 15 and second 16 securing elements is at least partly elastic, the latter will deform elastically during the fall of the tool so as to cushion it. This limits the forces to which the tool is subjected during its fall so as to preserve its integrity and avoid its deterioration.

6.2. Deuxième mode de réalisation6.2. Second embodiment 6.2.1. Architecture6.2.1. Architecture

On présente, en relation avec les figures 5 à 8, un deuxième mode de réalisation d'un ensemble de retenue selon l'invention.We present, in relation to the figures 5 to 8 , a second embodiment of a restraint assembly according to the invention.

Seules les principales différences entre des ensembles de retenue selon les premier et deuxième modes de réalisation sont décrites en détail par la suite.Only the main differences between restraint assemblies according to the first and second embodiments are described in detail below.

Dans ce deuxième mode de réalisation, l'un des premier 15 et deuxième 16 éléments de solidarisation, en l'occurrence le deuxième même s'il pourrait s'agir du premier, est traversé par une pluralité de trous 163 et est apte à être plié en accordéon de manière à placer les trous alignés le long d'un même axe.In this second embodiment, one of the first 15 and second 16 securing elements, in this case the second even if it could be the first, is traversed by a plurality of holes 163 and is able to be accordion-folded so as to place the holes aligned along the same axis.

La figure 9 illustre le deuxième élément de solidarisation 16 qui prend la forme d'une bande. Cette bande est traversée par une pluralité de trous 163. Ces trous 163 sont ménagés selon des axes transversaux perpendiculaires à l'axe longitudinal C de la bande. Ils sont répartis de manière équidistante le long de cet axe longitudinal C.The figure 9 illustrates the second securing element 16 which takes the form of a strip. This band is traversed by a plurality of holes 163. These holes 163 are arranged along transverse axes perpendicular to the longitudinal axis C of the strip. They are distributed equidistantly along this longitudinal axis C.

Cette bande peut être au moins en partie repliée sur elle même en accordéon et ainsi présenter une pluralité de plis 164. Les trous 163 situés sur les plis 164 se trouvent alors alignés le long d'un même axe D parallèle à l'axe longitudinal C.This band can be at least partly folded on itself like an accordion and thus have a plurality of folds 164. The holes 163 located on the folds 164 are then aligned along the same axis D parallel to the longitudinal axis C .

Le deuxième élément de solidarisation 16 peut être maintenu ainsi plié en accordéon en faisant passer une tige de retenue 60 (encore appelée élément de retenue) à travers les trous, l'une des extrémités 61 de la tige étant encliquetée dans la fente 140 du crochet 14 alors que l'autre extrémité porte une boule d'amortissement 62 dont la section est de dimension(s) supérieure(s) à celle(s) des trous.The second fastening element 16 can be kept thus accordion-folded by passing a retaining rod 60 (also called retaining element) through the holes, one of the ends 61 of the rod being snapped into the slot 140 of the hook 14 while the other end carries a damping ball 62 whose section is of dimension(s) greater than that(s) of the holes.

Le deuxième élément de solidarisation 16 peut alors prendre :

  • un état de repos (illustré au figures 5, 6 et 7) dans lequel il est au moins en partie replié en accordéon et maintenu ainsi par la tige de retenue 60, et
  • un état final (illustré à la figure 8) pris après la chute d'un outil solidarisé à l'ensemble de retenue suspendu à l'extrémité du cordon, chute au cours de laquelle la boule d'amortissement 62 passe à travers au moins un des trous 163 en freinant la chute de l'outil par friction sur les bords de l'au moins un trou 163 lorsqu'un seuil de tension prédéterminé sur le cordon est atteint.
The second securing element 16 can then take:
  • a state of rest (shown in figure 5 , 6 and 7 ) in which it is at least partly accordion-folded and thus held by the retaining rod 60, and
  • a final state (shown in figure 8 ) taken after the fall of a tool secured to the retaining assembly suspended at the end of the cord, fall during which the damping ball 62 passes through at least one of the holes 163 by slowing the fall of the tool by friction on the edges of the at least one hole 163 when a predetermined tension threshold on the bead is reached.

Il peut être observé sur le figure 8, qui illustre un outil suspendu à un ensemble de retenue après une chute, que la longueur du deuxième élément de solidarisation 16 est plus grande qu'avant la chute (cf. figures 5, 6 et 7). La boule d'amortissement 62 est donc passée à travers plusieurs trous 163 du deuxième élément de solidarisation induisant à chaque fois un amortissement par friction. Cet amortissement par friction permet de limiter les efforts subis par l'outil et donc de préserver son intégrité et limiter sa détérioration.It can be observed on the figure 8 , which illustrates a tool suspended from a retaining assembly after a fall, that the length of the second securing element 16 is greater than before the fall (cf. figure 5 , 6 and 7 ). The damping ball 62 has therefore passed through several holes 163 of the second securing element each time inducing a damping by friction. This damping by friction makes it possible to limit the forces undergone by the tool and therefore to preserve its integrity and limit its deterioration.

La boule de retenue 60 sera préférentiellement réalisée dans un matériau élastique comme par exemple en élastomère, en mousse, ou autre matériau adapté.The retaining ball 60 will preferably be made of an elastic material such as, for example, elastomer, foam, or another suitable material.

Un œillet pourra délimiter le contour périphérique de chaque trou du deuxième élément de solidarisation.An eyelet may delimit the peripheral contour of each hole of the second fastening element.

Dans une variante préférentielle, les trous de l'élément de solidarisation 16 et la boule d'amortissement 60 sont dimensionnés de telle sorte qu'un seuil de force prédéterminé subi par l'outil au cours d'une chute au-delà duquel l'outil doit être révisé est atteint après que la boule d'amortissement 60 ait passé un nombre minimum prédéterminé de trous. Ce seuil peut par exemple être dépassé dès le passage de la boule d'amortissement à travers un seul des trous.In a preferred variant, the holes of the securing element 16 and the damping ball 60 are dimensioned such that a predetermined force threshold undergone by the tool during a fall beyond which the tool to be serviced is reached after the damping ball 60 has passed a predetermined minimum number of holes. This threshold can for example be exceeded as soon as the damping ball passes through only one of the holes.

L'ensemble de retenue comprend ainsi des moyens indicateurs de ce qu'un outil auquel l'ensemble de retenue suspendu au cordon est fixé a subi une chute induisant sur l'outil une force atteignant un seuil prédéterminé au-delà duquel l'outil doit être révisé. Ces moyens indicateurs sont simples à mettre en œuvre et fournissent de manière aisément indentifiable l'information de la nécessité de réviser l'outil.The retaining assembly thus comprises means indicating that a tool to which the retaining assembly suspended from the cord is attached has suffered a fall inducing on the tool a force reaching a predetermined threshold beyond which the tool must be revised. These means of indicators are simple to implement and provide easily identifiable information on the need to revise the tool.

De tels moyens indicateurs pourront alternativement ou en complément être obtenus, dans le premier comme dans le deuxième mode de réalisation, en dimensionnant au moins l'un des éléments de solidarisation 15, 16 et/ou au moins l'une des plaques de fixation 10, 11 de sorte qu'il(s) soi(en)t plastiquement déformable(s) au-delà d'un seuil d'effort subi par un outil au cours d'une chute induisant qu'il doit être révisé.Such indicator means may alternatively or in addition be obtained, in the first as in the second embodiment, by sizing at least one of the securing elements 15, 16 and/or at least one of the fixing plates 10 , 11 so that it (s) is (are) t plastically deformable (s) beyond a threshold of force undergone by a tool during a fall inducing that it must be revised.

6.2.2. Fonctionnement6.2.2. Functioning

Au cours de la chute d'un outil 3, et à partir du moment où le cordon est tendu, la chute de l'outil est amortie par le passage de la boule d'amortissement 62 à travers quelques trous de l'élément de solidarisation 16 qui se déplie en partie.During the fall of a tool 3, and from the moment the cord is stretched, the fall of the tool is damped by the passage of the damping ball 62 through a few holes of the securing element 16 which partially unfolds.

On préserve ainsi l'intégrité de l'outil.This preserves the integrity of the tool.

Si la boule d'amortissement 62 traverse au cours de la chute de l'outil un nombre de trous prédéterminé correspondant à l'atteinte par les efforts subis par l'outil d'un seuil au-delà duquel il doit être révisé, l'opérateur pourra le constater visuellement.If the damping ball 62 crosses during the fall of the tool a predetermined number of holes corresponding to the achievement by the forces undergone by the tool of a threshold beyond which it must be revised, the operator will be able to see this visually.

Pour faciliter la lecture de cette information, le deuxième élément de solidarisation 16 pourra être bicolore : il pourra présenter une première couleur par exemple vert sur une première partie de sa longueur (placée du côté de la boule 60 lorsque qu'il est en état de repos) et une deuxième couleur par exemple rouge sur une deuxième partie de sa longueur. Tant qu'au cours d'une chute le deuxième élément de solidarisation se dépliera sur sa portion verte, alors les efforts subis par l'outil au cours de sa chute seront inférieurs au seuil au-delà duquel il doit être révisé. Si au contraire, le deuxième élément de solidarisation se déplie sur sa portion rouge, alors les efforts subis par l'outil au cours de sa chute seront supérieurs au seuil au-delà duquel il doit être révisé.To facilitate the reading of this information, the second securing element 16 may be two-tone: it may have a first color, for example green, over a first part of its length (placed on the side of the ball 60 when it is in a state of rest) and a second color, for example red, over a second part of its length. As long as during a fall the second fastening element unfolds on its green portion, then the forces undergone by the tool during its fall will be lower than the threshold beyond which it must be revised. If, on the contrary, the second securing element is unfolds on its red portion, then the forces undergone by the tool during its fall will be greater than the threshold beyond which it must be serviced.

Claims (15)

  1. Restraining assembly (1) able to be attached to a portable tool (3) to allow the connection of a safety cord (2) to said tool (3), said assembly (1) comprising:
    - a first (10) and a second (11) attachment plate suitable for being secured to said portable tool (3) while gripping the body (30) thereof;
    - an anchoring element (14) suitable for attaching said cord (2);
    - a first (15) and a second (16) flexible securing element each having an end secured to said anchoring element (14) and an end respectively secured to said first (10) and said second (11) attachment plate, characterised in that the lengths of said first (15) and second (16) securing elements are selected so as to place said anchoring element (14) with respect to the centre of gravity (G) of said tool (3) to which said assembly (1) is intended to be attached so as to give a predetermined orientation to said tool (3) when it is suspended from said cord (2) by said restraining assembly (1).
  2. Assembly according to claim 1, wherein said first (15) and second (16) flexible securing elements are made from a technical textile material.
  3. Assembly according to claim 1 or 2, wherein the lengths of said first (15) and second (16) securing elements are selected so as to place said anchoring element (14) along a vertical axis (B) passing through the centre of gravity (G) of said tool (3) to which said assembly (1) is intended to be attached when said assembly (1) is held essentially horizontally.
  4. Assembly according to claim 1, wherein the lengths of said first (15) and second (16) securing elements are selected so as to place said anchoring element (14) along a vertical axis (B) located on one side or the other of the centre of gravity (G) of said tool (3) to which said assembly (1) is intended to be attached when said assembly (1) is held essentially horizontally.
  5. Assembly according to any one of claims 1 to 3, wherein said predetermined orientation is such that the projection onto the ground of said tool (3) to which said assembly (1) is intended to be attached has the smallest possible surface area.
  6. Assembly according to claim 5, wherein the lengths of said first (15) and second (16) securing elements are determined so that the largest dimension of said tool (3) to which said assembly (1) is intended to be attached extends essentially parallel to the longitudinal axis of the cord (2) when said assembly (1) is suspended from said cord (2).
  7. Assembly according to claim 6, wherein the lengths of said first (15) and second (16) securing elements are determined so that the head (31) of said tool (3) to which said assembly (1) is intended to be attached is oriented downwards when said assembly (1) is suspended from said cord (2).
  8. Assembly according to any one of claims 1 to 7, comprising damping means suitable for damping the fall of a tool (3) secured to said assembly (1) suspended from said cord (2).
  9. Assembly according to any one of claims 1 to 8, comprising indicator means indicating that a tool (3) attached to said restraining assembly (1) suspended from said cord (2) has suffered a fall inducing on said tool (3) a force reaching a predetermined threshold beyond which said tool (3) must be checked.
  10. Assembly according to claim 8 or 9, wherein at least one of said first (15) and second (16) securing elements is elastically deformable.
  11. Assembly according to claim 9, wherein at least one of said first (15) and second (16) securing elements is plastically deformable beyond said threshold.
  12. Assembly according to claim 9, wherein at least one of said first (10) and second (11) attachment plates is plastically deformable beyond said threshold.
  13. Assembly according to any one of claims 8 to 12, wherein at least one of said securing elements (15, 16) can adopt:
    - a state of rest wherein it is at least partly folded in an accordion, each of said folds (164) having a hole (163) pass through it, said holes (163) extending essentially along the same axis and all having at least one restraining element (60) pass through it, a first end of which is secured to said anchoring element (14) and the other so-called damping end having a cross section greater than that of said holes (163), and
    - a final state adopted after the fall of a tool (3) secured to said assembly (1) suspended at the end of said cord (2), a fall during which said damping end passes through at least one of said holes (163) while braking the fall of said tool (3) by friction on the edges of said at least one hole (163) when a predetermined tension threshold on said cord (2) is reached.
  14. Assembly according to claim 13, wherein each of said holes (163) is surrounded by an eyelet and said damping end is made from an elastically deformable material.
  15. Assembly according to claim 13 or 14, wherein said holes (163) and said damping end are sized so that said predetermined force threshold suffered by said tool (3) in the course of a fall beyond which said tool (3) must be checked is reached after said damping end has passed a predetermined number of holes (163).
EP19212597.9A 2018-12-14 2019-11-29 Optimized restraining system Active EP3666473B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1872947A FR3089839B1 (en) 2018-12-14 2018-12-14 Optimized restraint system

Publications (2)

Publication Number Publication Date
EP3666473A1 EP3666473A1 (en) 2020-06-17
EP3666473B1 true EP3666473B1 (en) 2022-07-13

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Application Number Title Priority Date Filing Date
EP19212597.9A Active EP3666473B1 (en) 2018-12-14 2019-11-29 Optimized restraining system

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EP (1) EP3666473B1 (en)
FR (1) FR3089839B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE457424B (en) * 1987-12-04 1988-12-27 Atlas Copco Ab HANGING DEVICE FOR MACHINE TOOLS
US8011541B2 (en) * 2005-11-21 2011-09-06 Castle Mountain Enterprises Llc Tool containment system
JP2013059837A (en) 2011-09-14 2013-04-04 Makita Corp Power tool, and suspension device for the power tool
US10045606B2 (en) 2015-11-02 2018-08-14 Black & Decker Inc. Impact-absorbing tethering attachment
US10383429B2 (en) 2016-09-23 2019-08-20 Ty-Flot, Inc. Drop-prevention tool harness and method for pistol-grip hand tools
US10449662B2 (en) 2016-11-16 2019-10-22 Ty-Flot, Inc. Tethering assembly and method for grinders and like tools

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Publication number Publication date
FR3089839A1 (en) 2020-06-19
EP3666473A1 (en) 2020-06-17
FR3089839B1 (en) 2021-07-23

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