EP2335781A1 - Vorrichtung zur Erhöhung der Elastizität eines länglichen Elements, längliches Element vom Typ Gurt oder Seil und mit einer solchen Vorrichtung ausgestattete individuelle Schutzausrüstung - Google Patents

Vorrichtung zur Erhöhung der Elastizität eines länglichen Elements, längliches Element vom Typ Gurt oder Seil und mit einer solchen Vorrichtung ausgestattete individuelle Schutzausrüstung Download PDF

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Publication number
EP2335781A1
EP2335781A1 EP10195214A EP10195214A EP2335781A1 EP 2335781 A1 EP2335781 A1 EP 2335781A1 EP 10195214 A EP10195214 A EP 10195214A EP 10195214 A EP10195214 A EP 10195214A EP 2335781 A1 EP2335781 A1 EP 2335781A1
Authority
EP
European Patent Office
Prior art keywords
strap
damping device
corrugation
elongated element
sliding connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10195214A
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English (en)
French (fr)
Inventor
Jacques Benoit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Froment
Original Assignee
Froment
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Froment filed Critical Froment
Publication of EP2335781A1 publication Critical patent/EP2335781A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means

Definitions

  • the present invention relates to a device for increasing the elasticity of an elongated element of the strap or rope type, in its longitudinal direction.
  • the present invention also relates to an elongated element of the strap or rope type which is provided with at least one such device.
  • the present invention relates to personal protective equipment which is provided with at least one such device.
  • an "elongated element” designates an element having at least two ends and capable of being subjected to a tension, that is to say to a traction force exerted on one and / or the other of its ends.
  • a tension that is to say to a traction force exerted on one and / or the other of its ends.
  • Such an elongated element is for example a strap, a rope, a cable, a belt, a strap, a ribbon and other equivalent units.
  • personal protective equipment means equipment intended to ensure the maintenance and / or the integrity of a person or an object, comprising at least one "elongated element".
  • Such personal protective equipment is for example a helmet, a harness, a fall arrest system, etc.
  • FR-A-2 781 349 discloses a damping strap for supporting loads having variations of effort.
  • This damping strap is equipped with a device for increasing its elasticity.
  • This device comprises an elastically deformable portion which is formed by corrugations and which is made of synthetic material overmolded on the strap.
  • the position of the device and the dimensions of the strap must be adapted to each specific use, for example to a schoolbag, a harness, helmet, etc ... It is then necessary to provide a range of specific straps, as well as a large volume of storage.
  • the overmolding of the elastically deformable portion on the strap is a relatively difficult operation technically, therefore expensive, to achieve.
  • this overmoulding operation strongly restricts the choice of the synthetic material constituting the elastically deformable part, as well as the choice of the fabric constituting the straps.
  • the present invention aims to overcome these disadvantages.
  • the present invention relates to an elongated element of the strap or rope type, which is provided with at least one device as previously exposed, the or each elongate element extending in abutment on the or each undulation.
  • the subject of the present invention is personal protective equipment which is provided with at least one such elongated element of the strap or rope type as explained above.
  • the figure 1 illustrates a strap 2 shown partially and belonging to personal protective equipment such as a harness.
  • the strap 2 extends in a longitudinal direction, represented by an axis X 2 -X ' 2 , and which is provided with a damping device 1.
  • the longitudinal axis X 2 -X' 2 represents the median axis of the strap 2, that is to say the axis located at half the width I 2 .
  • the damping device 1 comprises an elastically deformable portion which is formed by a corrugation 10.
  • the corrugation 10 forms a projection which extends generally in a transverse direction represented by an axis Y 2 -Y ' 2 perpendicular to the longitudinal axis X 2 -X ' 2 .
  • the damping device 1 comprises two tabs 21 and 22 which are in the form of loops and which are respectively disposed at each end, along the axis X 2 -X ' 2 , of the corrugation 10.
  • the tabs 21 and 22 have come from material with the corrugation 10, so that each tab 21 or 22 extends one end of the corrugation 10, that is to say the elastically deformable portion of the damping device 1.
  • the damping device 1 further comprises two plates 31 and 32 which are generally planar and which are respectively arranged facing tabs 21 and 22 along the axis X 2 -X ' 2 .
  • each plate 31 or 32 extends in a plane which is parallel to the plane in which the corresponding tab 21 or 22 extends.
  • the tab 21 and the plate 31 have two side walls 25 and 27 extending on each side of the longitudinal axis X 2 -X ' 2 and, more precisely, from each edge of the plate 31 according to a lateral direction Z 2 -Z ' 2 which is perpendicular to the axes X 2 -X' 2 and Y 2 -Y ' 2 .
  • the tab 22 and the plate have two side walls 26 and 28 extending on each side of the longitudinal axis X 2 -X ' 2 and, more precisely, at each edge of the plate 32 in the direction Z 2 -Z ' 2 .
  • the side walls 25 to 28 extend parallel to the longitudinal axis X 2 -X ' 2 .
  • the tab 21 and the plate 31 form two independent parts which belong to a sliding connection means and which are linked to one another by clipping.
  • the tab 31 and the plate 31 comprise respective members of complementary shapes, not shown, which allow the resilient snap of the tab 21 on the plate 31.
  • the segments 21.31 and 22.32 visible to the Figures 3 and 4 represent the limits of the independent parts formed by the lug 21 and the plate 31, on the one hand, and the lug 22 and the plate 32, on the other hand.
  • the tab 22 and the plate 32 form two independent parts linked by clipping of their respective complementary members not shown.
  • one or each sliding connection means may be formed by two one-piece parts, for example a tab and an inseparable plate.
  • the snap elastic of such independent parts can be provided to achieve their removable attachment. It is then possible to detach the tab 21 from the plate 31, for example to mount another tab on the plate 31.
  • the tab 21 is distant from the plate 31 of a height greater than the thickness of the strap 2, considered along the transverse axis Y 2 -Y ' 2 .
  • the side wall 25 is spaced from the side wall 27 of a width 41 greater than the width I 2 of the strap 2 considered along the lateral axis Z 2 -Z ' 2 .
  • the tab 21, the plate 31 and the side walls 25 and 27 together define a closed contour forming an opening 41 which is adapted for the passage of the strap 2.
  • the strap 2 passes through the opening 41, that is to say between the tab 21, the plate 31 and the side walls 25 and 27.
  • the tab 22, the plate 32 and the side walls 26 and 28 together define a closed contour forming an opening 41 which is adapted for the passage of the strap 2.
  • the strap 2 passes through the opening 42, that is to say between the tab 22, the plate 32 and the side walls 26 and 28.
  • the tab 21, the plate 31 and the side walls 25 and 27 form, opposite the opening 41, a closed contour defining an opening 43 which allows the passage of the strap 2 at an end of the corrugation 10.
  • the tab 22, the plate 32 and the side walls 26 and 28 form, opposite the opening 42, a closed contour defining an opening 44 which allows the passage of the strap 2 at the other end of the corrugation 10.
  • the strap 2 and the damping device 1 When the strap 2 and the damping device 1 are assembled, the strap 2, considered along the longitudinal axis X 2 -X ' 2 , passes through the opening 41, then through the opening 43. Then, it s' extends open on the surface of the corrugation 10. In other words, the corrugation 10 receives the strap 2 sliding support.
  • the strap 2 passes through the opening 44 and leaves through the opening 42.
  • the strap 2 is secured to the damping device 1, because it is retained in the loops formed by the openings 41, 43, 44 and 42.
  • the strap is retained by its insertion between the lug 21 and the plate 31, on the one hand, and between the lug 22 and the plate 32, on the other hand.
  • the corrugation 10 consists of a solid and curved ply whose width I 10 , visible at figure 3 is greater than the width I 2 of the strap 2.
  • a corrugated segment 3 belonging to the strap 2 extends along the corrugation 10, whose shape matches.
  • the strap 2 rests slidingly on the corrugation 10.
  • the corrugation 10 has a sufficiently smooth surface to allow the slipping of the strap 2 when the damping device 1 is kept still. On the other hand, there is frictional retention between the surface of the corrugation 10 and the damping device 1 which retains the latter position along the strap 2 in motion.
  • Each opening 41, 42, 43 or 44 has a barlong section in a plane perpendicular to the longitudinal axis X 2 -X ' 2 . This barlongue section is adapted to the dimensions of the strap 2. Given the respective dimensions of the strap 2 and the openings 41, 42, 43 and 44, each opening 41, 42, 43 or 44 forms a sliding connection means of the strap 2 with the damping device 1. Each of these sliding connection means is independent for the strap 2. In other words, the damping device 1 has four separate means of sliding connection.
  • the corrugation 10 is disposed between the sliding connection means constituted by the openings 41 and 43, on the one hand, and the sliding connection means formed by the openings 42 and 44, on the other hand.
  • the strap 2 After threading through the openings 41, 43, 44 and 42 the strap 2 is provided with the damping device 1.
  • the strap 2 may be provided with the damping device 1 after its installation on the corrugation 10 and the clipping of the tabs 21 and 22 respectively on the plates 31 and 32.
  • the tab 21 and the plate 31 respectively have an edge 23 and an edge 33 on their opposite side to the corrugation 10.
  • the tab 22 and the plate 32 respectively have an edge 24 and an edge 34 on their opposite side.
  • the edges 23, 33, 24 and 34 are rounded and symmetrical with respect to the longitudinal axis X 2 -X ' 2 .
  • the rounded shape of the edges 23, 33, 24 and 34 preferably convex, avoids damaging the strap 2 as it slides through the openings 41, 43, 44 and 42.
  • the damping device 1 is composed of a synthetic material which is selected for its elastic properties. Thus, the damping device 1 makes it possible to increase the elasticity of the strap 2 along the longitudinal axis X 2 -X ' 2 .
  • the corrugation 10 when the strap 2 is subjected to a tension F, the corrugation 10 is deformed elastically, which makes it possible to partially absorb the energy supplied by the tension F.
  • its height H 10 along the transverse axis Y 2 -Y ' 2 , decreases while its length L 10 along the longitudinal axis X 2 -X' 2 increases.
  • the corrugation 10 returns to its initial position and to its initial dimensions H 10 and L 10 .
  • the modulus of elasticity of the corrugation 10, which forms the elastically deformable portion of the damping device 1 is selected so as to ensure elastic deformation only when the tension F exerted on the strap 2 exceeds a predetermined threshold of overvoltage .
  • the damping device 1 increases the longitudinal elasticity of the strap 2, which allows the strap 2 to absorb the energy developed by an overvoltage F.
  • overvoltage is exerted for example on the straps constituting a safety harness 6 when his wearer makes a movement.
  • Personal protective equipment according to the invention such as the harness illustrated in figures 7 and 8, then makes it possible to attenuate the effects of its movements on the wearer by providing increased comfort.
  • the dimensions of the damping device 1, in particular the number of corrugations 10, the height H 10 , the length L 10 and the width I 10 as well as the modulus of elasticity of the synthetic material, are selected according to the application intended for the strap 2 or the harness 6, in particular as a function of the predictable overvoltages for such an application.
  • the damping device 1 ensures elastic deformation of large amplitude.
  • the damping device 1 in particular its modulus of elasticity, can be dimensioned so that the corrugation 10 always works in the elastic domain even at its maximum extension in the plane X 2 -X ' 2 , Z 2 - Z ' 2 , that is to say at its minimum extension in the transverse direction Y 2 -Y' 2 ("flat" waveform).
  • the strap 2 sets the elastic limit of the assembly composed of the strap 2 provided with the damping device 1. In the example of Figures 1 to 5 there is only one undulation 10.
  • Another advantage of the invention lies in the mobility of the damping device 1 along the strap 2.
  • the relative sliding of the strap 2 and the damping device 1 offers a maximum amplitude in the adjustment of the position of the device damper 1 along the strap 2.
  • the user slid the strap 2 through the openings 41, 43, 44 and 42 until the desired position.
  • a device of the prior art is irremovable, since it is overmolded directly on the strap, so that its position relative to the strap is not adjustable, especially in the longitudinal direction of the elongated element.
  • the damping device 1 can be detached from the strap 2, or decomposed by separating the independent snap-on parts to release the strap 2, the user can replace the damping device 1, especially in case of rupture or when he wishes to obtain a different elasticity.
  • the damping device 1 when overload or excessive fatigue causes the rupture of the elastically deformable part, it is not possible to replace the damping device on the strap, which implies replacing the complete harness.
  • the damping device 1 offers great modularity, because it is possible to add and remove one or more device (s) damper (s) on the same strap.
  • the number of damping devices 1 equipping the strap 2 is determined by the user according to the desired elasticity. In the example of Figures 1 to 5 , this number is equal to one.
  • the positions of the damping devices 1 on the strap 2 are determined by the user according to the parts of the strap he wishes to make elastic.
  • the damping device 1 is manufactured separately from the strap 2. Therefore, its manufacture is relatively easier and less expensive, because it does not require the simultaneous implementation of several pieces in different materials. In addition, the invention makes it possible to reduce the storage volumes before and after the manufacture of the damping devices 1.
  • the present invention therefore provides a removable damping device, adjustable and modular, replaceable, simple and economical to manufacture
  • the damping device comprises adjustable positioning means, which may be formed by removable fastening means in a predetermined position of the damping device relative to the strap.
  • Such fastening means may comprise foldable branches adapted to grip the strap.
  • the branches When the branches are closed, the damping device is attached to the strap. When the branches are open, the damping device is detached from the strap. The user can then attach the device again damper to the strap, but in a predetermined position different from the previous position.
  • the branches are adjustable positioning means.
  • the figure 5 illustrates a damping device 101 comprising two corrugations 110 and 111 juxtaposed.
  • the description of the damping device 1 given above may be transposed to the damping device 101 taking into account the differences set out below.
  • the corrugations 110 and 111 are identical and they are separated by a curved portion 112.
  • the corrugations 110 and 111 and the curved portion 112 together form the elastically deformable portion of the damping device 101.
  • the portion The elastically deformable device of the damping device 101 comprises two corrugations 110 and 111. However, it could comprise a larger number, depending on the application of the invention.
  • this elastically deformable portion are extended respectively by the tab 121 and by the tab 122 and they are respectively secured to the plate 131 and to the plate 132.
  • the corrugations 110 and 111, the tabs 121 and 122 and the plates 131 and 132 are made of material, for example from molding.
  • the elastically deformable portion has two openings 145 and 146 which are formed on either side of the curved portion 112.
  • the openings 145 and 146 extend over most of the width of the damping device 101.
  • the openings 145 and 146 allow the passage of the strap 102.
  • the strap 102 thus passes from one face to the other of the elastically deformable portion.
  • a first corrugated segment 103 extends on the upper face of the corrugation 110 between the openings 143 and 145. Then a second corrugated segment 104 extends on the lower face of the curved portion 112 between the openings 145 and 146. a third corrugated segment 105 extends on the face upper of the corrugation 111 between the openings 146 and 144. In other words, each corrugation 110 or 111 receives the strap 2 sliding support.
  • the terms "upper” and “lower” are used in a sense relative to the position on the figure 5 of the element to which they relate.
  • Each opening 141, 143, 145, 146, 144 or 142 forms a sliding connection means of the damping device 101 to the strap 102.
  • the damping device 101 thus comprises six separate sliding connection means.
  • Each corrugation 110 and 111 is disposed between sliding connection means.
  • the strap 102 is held in contact with the elastically deformable portion.
  • the corrugated segments 102, 103 and 105 respectively extend along the corrugation 110, the curved portion 112 and the corrugation 111.
  • the damping device 101 When an overvoltage is exerted on the assembly 102, the corrugations 110 and 111 deform elastically so as to absorb all or part of the energy supplied by this overvoltage.
  • the damping device 101 thus makes it possible to increase the elasticity of the strap 102 along its longitudinal direction X 102 -X ' 102 .
  • the damping device 101 is removable and modular because adjustable in longitudinal position.
  • the Figures 6 and 7 illustrate the front and rear portions of a safety harness 6 placed on a user U.
  • the safety harness 6 is a personal protective equipment according to the invention, since it comprises 2A-2D straps each provided with a damping device 1 A-1 F respectively similar to the strap 2 and the damping device 1 of the Figures 1 to 4 .
  • Each of the damping devices 1 A-1 F makes it possible to increase the longitudinal elasticity of the respective strap 2A-2D with which it is assembled, as described above for the damping device 1.
  • the safety harness 6 is further provided with a damping device 201 which comprises at least four sliding connection means to the two straps 2C and 2D crossed and superimposed.
  • the damping device 201 may be composed of two damping devices of type 1 juxtaposed offset.
  • a tab of one of the damping devices can be fixed on one of the plates of the other damping device.
  • the damping device 201 thus has the shape of an "X" in plan view.
  • the damping device 201 can perform the same function as a damping device of type 1 or 101 for each of the straps 2C and 2D, namely to increase their longitudinal elasticity.
  • a damping device is adapted to increase the elasticity of three strands of strap.
  • Such a damping device has a shape of "Y" in plan view. The three strands of strap are then linked together.
  • a damping device according to the invention may be made of metal, for example a spring steel, with dimensions giving it the required elasticity.
  • a damping device may have one or more corrugations having a shape different from those of the corrugations 10, 110 and 111 illustrated in FIGS. Figures 1 to 5 .
  • the corrugation can be asymmetrical with respect to a transverse plane parallel to the axis Z 2 -Z ' 2 .
  • elongate members may be employed to realize the invention, such as a rope, cable, belt, lanyard, ribbon or elongated fabric.
  • the elastically deformable portion of the damping device has an elasticity greater than the own elasticity of the elongated element.
  • personal protective equipment according to the invention may alternatively be constituted by a helmet, a seat belt, etc ...
  • a damping device comprises a single corrugation and only two sliding connection means to the elongated element, each of these means being able to be formed by a simple loop with a closed contour.
  • each opening of the damping device may have an open contour on one side, instead of the closed contour of the openings 41 to 44 of the damping device 1.
  • Such an open contour is for example obtained with type plates 31 and 32 split over their entire length. length at their middle region.
  • the sliding connection means thus defined are lightened and can facilitate the mounting of the strap.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Vibration Dampers (AREA)
EP10195214A 2009-12-16 2010-12-15 Vorrichtung zur Erhöhung der Elastizität eines länglichen Elements, längliches Element vom Typ Gurt oder Seil und mit einer solchen Vorrichtung ausgestattete individuelle Schutzausrüstung Withdrawn EP2335781A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0959063A FR2953728B1 (fr) 2009-12-16 2009-12-16 Disposif pour augmenter l'elasticite d'un element allonge, element allonge de type sangle ou corde et equipement de protection individuelle munis d'un tel dispositif

Publications (1)

Publication Number Publication Date
EP2335781A1 true EP2335781A1 (de) 2011-06-22

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Family Applications (1)

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EP10195214A Withdrawn EP2335781A1 (de) 2009-12-16 2010-12-15 Vorrichtung zur Erhöhung der Elastizität eines länglichen Elements, längliches Element vom Typ Gurt oder Seil und mit einer solchen Vorrichtung ausgestattete individuelle Schutzausrüstung

Country Status (2)

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EP (1) EP2335781A1 (de)
FR (1) FR2953728B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019119150A1 (en) * 2017-12-21 2019-06-27 Simon Fraser University Force-sensitive mechanism for protective devices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781349A1 (fr) 1998-07-23 2000-01-28 Janisset Sa Dispositif amortisseur avec limiteur de course pour sangle
WO2009066832A1 (en) * 2007-11-20 2009-05-28 Seok Dong Kim A strap for bag

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2781349A1 (fr) 1998-07-23 2000-01-28 Janisset Sa Dispositif amortisseur avec limiteur de course pour sangle
WO2009066832A1 (en) * 2007-11-20 2009-05-28 Seok Dong Kim A strap for bag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019119150A1 (en) * 2017-12-21 2019-06-27 Simon Fraser University Force-sensitive mechanism for protective devices

Also Published As

Publication number Publication date
FR2953728A1 (fr) 2011-06-17
FR2953728B1 (fr) 2012-01-13

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