EP3713868A1 - Portable hoisting device - Google Patents

Portable hoisting device

Info

Publication number
EP3713868A1
EP3713868A1 EP18821702.0A EP18821702A EP3713868A1 EP 3713868 A1 EP3713868 A1 EP 3713868A1 EP 18821702 A EP18821702 A EP 18821702A EP 3713868 A1 EP3713868 A1 EP 3713868A1
Authority
EP
European Patent Office
Prior art keywords
mast
attachment
ladder
bar
boom
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18821702.0A
Other languages
German (de)
French (fr)
Other versions
EP3713868B1 (en
Inventor
Pascal CHAUSSONNET
Laurent CHRISTIN
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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 Commissariat a lEnergie Atomique CEA, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP3713868A1 publication Critical patent/EP3713868A1/en
Application granted granted Critical
Publication of EP3713868B1 publication Critical patent/EP3713868B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
    • B66C23/24—Mobile wall cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
    • B66C23/203—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided by posts, e.g. scaffolding, trees or masts
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/12—Lifts or other hoisting devices on ladders

Definitions

  • the present invention relates to a portable lifting device for a ladder, in particular a portable hoisting device for a fixed ladder, in particular for a crinoline ladder.
  • the hoisting and lowering of the object are all the more difficult as the object is bulky, heavy, and / or fragile, and it is frequent that no lifting device likely to facilitate these actions is integrated into the object. 'installation.
  • JPH11159270 discloses a spacer device for a movable ladder which can be secured to two adjacent ladder bars by fixed hooks and sliding hooks on which support springs.
  • the body of the spacer device comprises a main portion comprising an assembly of tubes forming an "H” and arranged to extend along the scale, "under” the scale ie. between the ladder and the wall of a building against which the ladder is supported by means of the spacer device.
  • the body of the device further comprises a bearing portion on the building wall, which forms an angle with the longitudinal axis of the scale and which comprises several bars.
  • This device is used with a hoist hooked to one of the bars and allowing an operator on the ground to hoist an air conditioning unit "under" the ladder, from the ground on which the ladder rests to a support previously attached to the wall against which the ladder is supported.
  • This device that extends between the ladder and the wall against which the scale is based, is not suitable for hoisting a load along a ladder rigidly attached to a wall.
  • This device is bulky, especially because of the rigid connection between the main portion shaped "H" and the support portion; therefore, it is not suitable for hoisting a load along a ladder equipped with a crinoline, inside the crinoline, and it is also not suitable to be worn by an operator climbing a ladder, especially a crinoline ladder.
  • This bulky device is also unsuitable to be secured to a ladder, and then detached from the ladder, by an operator located on the ladder.
  • This device does not allow an operator to respect the basic rules of safety that must be applied to climb a ladder and perform work at height, especially the rule requiring the operator to constantly have three points of support on the scale .
  • An object of the invention is to provide a portable hoisting device for a fixed scale, which remedies, in part at least, the shortcomings or disadvantages of known devices.
  • a portable device for hoisting a load along a fixed ladder which is light, compact, safe to use, adaptable to different types of ladders in diameter and spacing bars, portable otherwise than by hand, which can be secured to the ladder quickly and with one hand, so as to allow an operator carrying the device to climb the ladder, to secure the device to scale, and continue its progression on scale, safely.
  • a hoisting device which comprises a bracket comprising a mast and a load arm retractable along the mast, means of engagement (hanging) reversible mast with two bars of a ladder, a port member of the device, and a support beam on one of the bars, the port member and the cross member being integral with the mast.
  • the reversible engagement means of the mast with two bars of a ladder preferably comprise a first attachment member to a first ladder rung (which is hereinafter referred to as "upper rung"), which is attached to the mast of the ladder. preferably rigidly, and a second attachment member to a second ladder rung (which is hereinafter referred to as “lower rung” and is substantially parallel to the first ladder rung), which is movably mounted relative to the mast, of so that the reversible engagement means are adjustable (deformable), and the reversible engagement means comprise means for biasing the fastening members towards one another.
  • a hoisting device which comprises:
  • a mast having a longitudinal axis
  • a support piece (on an upper bar) secured to the mast, which extends transversely (relative to the longitudinal axis), and door (or comprises) a first attachment member (to the upper bar) extending on either side of the mast, preferably substantially symmetrically with respect to the longitudinal axis;
  • a second attachment member (the lower bar) slidably mounted relative to the mast, in the vicinity of a second longitudinal end (or base) of the mast;
  • the boom is retractable along the mast, capable of passing from an expanded configuration in which the free end of the boom extends at a first distance from the longitudinal axis, to a retracted configuration in which the end free of the arrow extends to a second distance from the longitudinal axis which is less than the first distance.
  • Each of the attachment members may have a form of bent tongue, hook, or rider, the shape and dimensions of each attachment member being adapted / selected so that the member can overlap (or partially surround) a portion longitudinal scale bar, so as to hold the device in contact with the ladder bar.
  • the invention makes it possible to have, when the boom is retracted, a compact device, slender and balanced shape, which can easily be grasped and manipulated with one hand by an operator standing on the ladder and grasping the device by the mast, both to engage on his shoulder than to release it from his shoulder, to secure it to two parallel bars by deformation (extension) reversible engagement means, and to separate the bars by manipulation reverse.
  • the wearing member of the device may comprise or consist essentially of a first deformable link, of elongated shape, for example a strap or strip of textile material, whose two ends are secured to the mast, preferably respectively in the vicinity of both ends of the mast.
  • the first deformable link can be elastic; alternatively, the length of the link may be greater than the distance between the two attachment points of the link to the mast, so that an operator can engage his arm between the mast and the link to suspend the device to his shoulder, the link forming a strap.
  • the extension of the reversible engagement means is accompanied by an elongation of a return member (such as a spring) of the biasing means.
  • this extension is accompanied by compression of this return member.
  • the extension of the reversible engagement means can be obtained, after the second attachment member has been engaged with the lower bar, by traction exerted by the operator on the mast, substantially along the longitudinal axis of the mast and towards the upper bar, with a sufficient traction force to overcome the restoring forces exerted by the biasing means and the frictional forces during sliding of the second fastening member along the mast.
  • the intensity of this traction force can be in a range from about one Newton (IN) to about ten Newton (ION).
  • the device comprises a member or device for locking reversible engagement means, in particular a locking member preventing the sliding of the second fastening member along the mast, such as a cam clamping lever.
  • the retractable and deployable boom may comprise one or two articulated arms (s) on the mast, in particular one or two arms pivoting along one or two pivot axes which is (are) substantially perpendicular (s) to the longitudinal axis of the mast , in particular parallel (s) to the longitudinal axis of the support piece.
  • the boom comprises a pulling arm and a load arm.
  • the arrow may comprise an arm of load and a deformable tie, such as a cable, which connects the load arm to the mast.
  • At least a portion of the mast may have, in cross section, a concavity oriented towards the (s) arm of the boom.
  • This concave portion can thus receive a portion of the arm, in the retracted position of the boom, while ensuring the rigidity of the mast.
  • the device may comprise a mutually reversible fastener of the two arms of the boom, such as a pin, this fastener being secured to the device, in particular integral with the load arm, by a second deformable link such as a cablet.
  • the device may comprise a locking member of the mutual reversible fastener of the two arms, which may be integral with - in particular integrated with - the mutual attachment member of the arms, this locking member being for example constituted by a ball of a safety ball pin.
  • the device may further comprise a shackle fixed in the vicinity of the free end of the boom, and / or a carabiner for suspending a lifting pulley at the shackle and / or the boom, the pulley possibly comprising a brake for a cable or hoisting rope engaged in the pulley.
  • the invention provides a compact hauling device, lightweight, and easy to wear on the shoulder.
  • the dimensions of the parts of the hauling device and the materials chosen to achieve them can provide a device whose mass is less than 5 or 10 kilograms, the device for hoisting a load of several tens of kilograms.
  • a method of installing the device on a scale may include the following:
  • a method of removing the device may comprise the following operations:
  • Figure 1 illustrates, in perspective view, a hoisting device whose boom is deployed.
  • Figure 2 is a perspective view from another angle of the device shown in Figure 1.
  • Figure 3 illustrates, in side view, the hoisting device illustrated in Figures 1 and 2.
  • Each of Figures 1 to 3 further comprises, in the lower part of the figure, a cutaway illustrating an end position of the movable lower member hooking the device to a ladder bar.
  • Figure 4 illustrates, in side view, the device shown in Figure 3 in a retraction configuration of the boom obtained by inclining the arms of the arrow along the mast of the device.
  • FIG. 5 illustrates, in plan view, the device illustrated in FIG. 3 and is a view along V of FIG.
  • FIG. 6 schematically illustrates an operation of engagement of a lower fastening member of the hoisting device with a lower ladder rung
  • FIG. 7 schematically illustrates a subsequent operation of engagement of an upper fastening member. and supporting the hoisting device with another bar extending above the lower bar.
  • FIG. 8 schematically illustrates an operation of hoisting an object using a hoisting device secured to the two upper bars of a "non-opening" ladder, ie whose summit extends at a platform on which an operator can stand
  • FIG. 9 schematically illustrates an operation of hoisting an object using a hoisting device secured to two successive bars of 'an open ladder', ie whose summit extends over a platform on which can be held an operator.
  • the device 10 is used to hoist a load 104 (FIGS. 8 and 9), which is suspended from a deformable link such as a rope, along a fixed scale 102 comprising at least two bars 100 , 101 superimposed to which the device 10 is temporarily secured for this purpose.
  • a load 104 FIGS. 8 and 9
  • a deformable link such as a rope
  • the device 10 comprises a bracket 20 comprising a mast 21 extending along a longitudinal axis 70, and two arms 22, 23 articulated with respect to the mast and forming a retractable boom along the mast.
  • traction is performed by an operator on a rope (not shown) engaged in a pulley (not shown) suspended from the boom 22, 23.
  • the device may comprise, as shown in Figures 1 to 3, a shackle 90 fixed in the vicinity of the free end of the boom, and a carabiner suspended from the shackle and supporting the hoisting pulley.
  • the pulley may include a brake for the hoisting rope engaged in the pulley.
  • the mast 21 consists of a bar whose cross section has a shape of "U".
  • the upper arm 23, acting as a tie rod, is fixed to the upper end 74 of the mast 21, between the flanges of the U-shaped section 21, by a pivot pin 72 perpendicular to the axis 70.
  • the arms 22, 23 may thus extend in part between the flanges of the U-shaped section 21, along this section, when their free ends respective ones have been mutually separated, as illustrated in FIGS. 4, 6 and 7.
  • Each arm 22, 23 respectively comprises a yoke 26, 27 (see FIG. 4) pierced with a hole for the passage of a pin 80 with a ball (see FIG. 3 in particular) serving as a reversible mutual fastening member for the arms 22. , 23.
  • the operator pivots the arms 22, 23, from their retracted position along the mast to an extended position shown in FIGS. 1 to 3 and 5, in which position the orifices of the yokes 26, 27 are aligned. so that the operator can engage the pin 80 in these orifices.
  • the pin is connected to one of the parts of the device by a deformable link 81 (see Figure 3); the pin is for example connected, by the link 81, to another clevis 28 provided on the arm 22.
  • the pin comprises a locking member formed by a ball.
  • the device 10 comprises a crosspiece 50 (see FIG. 2 in particular) for supporting and hooking on a ladder rung, which is fixed rigidly to the arm 21, in a substantially "central" portion of the mast, ie d. in an intermediate portion between the upper ends 74 and lower 75 of the mast.
  • the crosspiece 50 extends along a transverse axis 73 (with reference to the axis 70) which is parallel to the axes 71, 72 of pivoting arms.
  • the arms 22, 23 extend from one side of the mast 21, while the cross member 50 extends from a second side of the mast opposite the first side.
  • the crosspiece 50 comprises - and essentially consists of - three flat wings (see Figure 4 in particular) elongated along the axis 73:
  • a first flange 34 serves to fix (rigidly) the cross member 50 to the mast 21; a "central" wing 31, which forms a right angle with the wing 34 so as to extend in a plane perpendicular to the axis 70 of the mast; and
  • a third flange 32 which forms an obtuse angle with the flange 34, serves to retain the cross member 50 (and the device 10) engaged with the bar 100 as the cross rests on this bar.
  • the central wing 31 can serve as a bearing surface on a bar 100 of upper scale, when the diameter of this bar is less than or equal to the width of the wing 31.
  • the crossbar 50 of support and hooking bears on the bar 100 by its two lateral wings 32 and 34.
  • the length of the crossbar 50 is greater than the width of the mast to ensure a stable support and attachment of the device on the bar 100.
  • the central part of the attachment wing 32 is provided with a cutout 32a serving to reduce the mass of the crossmember. Consequently, the fastening flange 32 comprises two projecting tabs extending respectively at the two longitudinal ends of the crossmember 50, so that these attachment tabs extend on either side of the mast.
  • the cross member 50 has a jumper shape whose concavity is directed towards the lower end 75 of the mast.
  • the device 10 comprises a second attachment member 33 with a second bar 101 of scale parallel to the first scale bar 100, which is fixed rigidly to a blade 29 slidably mounted relative to the mast, between the wings of the mast and against the core of the mast, along the longitudinal axis 70 of the mast, near the lower end 75 of the mast, so that the fastening member 33 is movable (sliding) relative to the mast 21.
  • the mobile attachment member 33 extends opposite the cross member 50 and has an upwardly flared jumper shape, the concavity of which is directed towards the upper end 74 of the mast and towards the cross member 50. As illustrated in FIGS. 2 to 4, the mobile attachment member 33 is formed of three flat wings parallel to the axis 73, and has a cross section identical to that of the crossmember 50.
  • the shape and dimensions of the crossmember 50 and the movable member 33 hooking are adapted so that each of these parts 33, 50 can partially surround a longitudinal portion of a ladder bar: the cross member 50 overlaps the portion upper portion of a longitudinal portion of the upper bar 100, and the movable member 33 hooking surrounds the lower portion of a longitudinal portion of the lower bar 101 (see Figures 3 and 7 to 9).
  • the flared shape of the crosspiece 50 and the movable member 33 hooking allows them to adapt to bars of different diameters by self-centering.
  • the device 10 also comprises a return member constituted by a spring 35 (see Figures 6 and 7), a first end is fixed to the blade 29 and a second end is fixed to the mast, so that the spring is biased in traction when the movable member 33 of attachment is spaced from the lower end 75 of the mast, as illustrated schematically in Figures 1 to 3 and 6.
  • a return member constituted by a spring 35 (see Figures 6 and 7)
  • a first end is fixed to the blade 29 and a second end is fixed to the mast, so that the spring is biased in traction when the movable member 33 of attachment is spaced from the lower end 75 of the mast, as illustrated schematically in Figures 1 to 3 and 6.
  • the spring 35 serves to return the blade 29 and the member 33 towards the upper end of the mast, ie. to the crossing 50.
  • the spring 35 allows self-maintaining the device to scale when not locked.
  • spring 35 is also used to self adapt the support members and attachment (31 to 34) depending on the distance between the ladder bars.
  • the blade 29 is pierced with a longitudinal opening through which extends a rod fixed to the core of the mast and which is secured to a lever 24 to pivoting cam 36 which can press the blade 29.
  • the cam lever 24 serves to prevent, in a first configuration (orientation) of the lever, and conversely to allow in a second configuration (orientation) of the lever, the sliding of the blade 29 and the second member 33 hooking relative to the mast.
  • the cross member 50 and its supporting and hooking members 31, 32, 34 can be positioned eccentrically on the mat, ie. closer to the lower end 75 of the mast than the upper end 74, so that the boom of the device extends above the bearing 103 (or platform shown in Figures 8 and 9), especially when the ladder stops at the level of the bearing as illustrated in FIG 8, allowing the operator in charge to recover the object 104 and located on the bearing, to grasp the object more easily.
  • the device 10 further comprises a strap 40 for transporting the device (see FIG. 7), the two ends 41, 42 of which are secured to the mast, respectively in the vicinity of the two ends 74, 75 of the mast.
  • the strap 40 is elastic, its length is greater than the distance between its two points 41, 42 of attachment to the mast.
  • the device can be used as follows:
  • the operator engages the mobile lower attachment member 33 of the device under a ladder bar 101 extending for example slightly above its belt, while maintaining (with its left hand) the inclined mast as illustrated in FIG. , i.e. whose end upper 74 extends away from the bars of the ladder, between the scale and the torso of the operator;
  • the operator can then release the mast of the device, slide the strap along its arm (left), and lock (by its left hand) the sliding of the blade 29 by acting on the cam lever 24;
  • the operator can then continue his progression on the ladder to a platform near the top of the mast (and the ladder), then deploy the boom of the bracket, lock the mutual assembly of the arms 22, 23 by the ball pin, engage a carabiner bearing a pulley in the shackle hanging from the boom, and engage a lifting rope into the pulley.
  • a second operator at a lower level at the bottom of the ladder can then lift a load suspended from the lifting rope.
  • the operator can proceed, in reverse order to the previous one, the reverse operations to retract the boom, put the strap of the device to the shoulder, and then disengage the device from the ladder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)

Abstract

The invention relates to a hoisting device (10) that comprises: a bracket (20) comprising a strut (21) and a load arm (22, 23) - or jib - which is retractable along the strut; deformable means (30) of reversible engagement of the strut with two bars of a ladder; a member (40) for carrying the device; and a supporting crossbar (50) on one of the bars, the carrying member and the crossbar being solidly fixed to the strut.

Description

Dispositif de hissage portatif DOMAINE TECHNIQUE  Portable hoisting device TECHNICAL DOMAIN
La présente invention est relative à un dispositif de levage portatif pour une échelle, en particulier un dispositif de hissage portatif pour une échelle fixe, notamment pour une échelle à crinoline.  The present invention relates to a portable lifting device for a ladder, in particular a portable hoisting device for a fixed ladder, in particular for a crinoline ladder.
ETAT DE LA TECHNIQUE  STATE OF THE ART
De nombreux bâtiments et installations industriels, notamment des installations pour la production d’électricité à partir de combustible, comportent des échelles fixées (« à demeure ») à des parois et permettant à des opérateurs de se déplacer dans l’installation ou le bâtiment, par exemple pour effectuer des opérations de maintenance ou de contrôle.  Many buildings and industrial facilities, including fuel-based electricity generation facilities, have fixed ("fixed") ladders to walls and allow operators to move around the facility or building, for example to carry out maintenance or control operations.
Lorsque ces opérations nécessitent l’emploi d’un objet, par exemple d’un outil ou d’un appareil de mesure, et qu’aucun moyen fixe de  When these operations require the use of an object, for example a tool or measuring device, and no fixed means of
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tiissage n’est prévu à proximité d’une échelle, il peut être nécessaire pour an opérateur ayant gravi l’échelle, de hisser l’objet suspendu à un lien déformable tel qu’une corde, le long de l’échelle, ou inversement de faire descendre l’objet suspendu à un lien déformable, également le long de ί 'échelle. In the vicinity of a ladder, it may be necessary for an operator having climbed the ladder to hoist the suspended object to a deformable link such as a rope, along the ladder, or vice versa. to lower the suspended object to a deformable link, also along the scale.
Le hissage et l’abaissement de l’objet sont d’autant plus difficiles que l’objet est volumineux, pesant, et/ou fragile, et il est fréquent qu’aucun dispositif de levage susceptible de faciliter ces actions ne soit ntégré à l’installation.  The hoisting and lowering of the object are all the more difficult as the object is bulky, heavy, and / or fragile, and it is frequent that no lifting device likely to facilitate these actions is integrated into the object. 'installation.
Il existe donc un besoin d’un dispositif de hissage qui puisse être iacilement transporté et mis en place par un opérateur gravissant une îchelle.  There is therefore a need for a hoisting device that can be easily transported and set up by an operator climbing a scale.
Le brevet JPH11159270 décrit un dispositif d’écartement pour une échelle mobile qui peut être solidarisé à deux barreaux adjacents de 'échelle par des crochets fixes et par des crochets coulissants sur esquels appuient des ressorts.  JPH11159270 discloses a spacer device for a movable ladder which can be secured to two adjacent ladder bars by fixed hooks and sliding hooks on which support springs.
Le corps du dispositif écarteur comporte une portion principale comportant un assemblage de tubes formant un « H » et agencée pour s’étendre le long de l’échelle, « sous » l’échelle c.à.d. entre l’échelle et la paroi d’un bâtiment contre laquelle l’échelle est mise en appui par l’intermédiaire du dispositif écarteur. The body of the spacer device comprises a main portion comprising an assembly of tubes forming an "H" and arranged to extend along the scale, "under" the scale ie. between the ladder and the wall of a building against which the ladder is supported by means of the spacer device.
Le corps du dispositif comporte en outre une portion d’appui sur la paroi de bâtiment, qui forme un angle avec l’axe longitudinal de l’échelle et qui comporte plusieurs barres.  The body of the device further comprises a bearing portion on the building wall, which forms an angle with the longitudinal axis of the scale and which comprises several bars.
Ce dispositif est utilisé avec un palan accroché à l’une des barres et permettant à un opérateur au sol de hisser une unité de conditionnement d’air « sous » l’échelle, depuis le sol sur lequel repose l’échelle jusqu’à un support préalablement fixé à la paroi contre laquelle l’échelle s’appuie.  This device is used with a hoist hooked to one of the bars and allowing an operator on the ground to hoist an air conditioning unit "under" the ladder, from the ground on which the ladder rests to a support previously attached to the wall against which the ladder is supported.
Ce dispositif qui s’étend entre l’échelle et la paroi contre laquelle s’appuie l’échelle, n’est pas adapté pour hisser une charge le long d’une échelle fixée rigidement à une paroi.  This device that extends between the ladder and the wall against which the scale is based, is not suitable for hoisting a load along a ladder rigidly attached to a wall.
Ce dispositif est volumineux, en raison notamment de la liaison rigide entre la portion principale en forme de « H » et la portion d’appui ; en conséquence, il n’est pas adapté pour hisser une charge le long d’une échelle équipée d’une crinoline, à l’intérieur de la crinoline, et il n’est pas non plus adapté pour être porté par un opérateur gravissant une échelle, en particulier une échelle à crinoline.  This device is bulky, especially because of the rigid connection between the main portion shaped "H" and the support portion; therefore, it is not suitable for hoisting a load along a ladder equipped with a crinoline, inside the crinoline, and it is also not suitable to be worn by an operator climbing a ladder, especially a crinoline ladder.
Ce dispositif encombrant est également inadapté pour être solidarisé à une échelle, puis désolidarisé de l’échelle, par un opérateur situé sur l’échelle.  This bulky device is also unsuitable to be secured to a ladder, and then detached from the ladder, by an operator located on the ladder.
Ce dispositif ne permet pas à un opérateur de respecter les règles élémentaires de sécurité qui doivent être appliquées pour gravir une échelle et effectuer des travaux en hauteur, en particulier la règle obligeant l’opérateur à avoir constamment trois points d’appui sur l’échelle.  This device does not allow an operator to respect the basic rules of safety that must be applied to climb a ladder and perform work at height, especially the rule requiring the operator to constantly have three points of support on the scale .
EXPOSÉ DE L'INVENTION  STATEMENT OF THE INVENTION
Un objectif de l’invention est de proposer un dispositif de hissage portatif pour une échelle fixe, qui remédie, en partie au moins, aux Lacunes ou inconvénients des dispositifs connus. Il est en particulier recherché un dispositif portatif de hissage d’une charge le long d’une échelle fixe, qui soit léger, compact, sûr à utiliser, adaptable à différents types d’échelles en diamètre et écartement des barreaux, portable autrement qu’à la main, pouvant être solidarisé à l’échelle rapidement et d’une seule main, de façon à permette à un opérateur portant le dispositif de gravir l’échelle, de solidariser le dispositif à l’échelle, et de poursuivre sa progression sur l’échelle, en toute sécurité. An object of the invention is to provide a portable hoisting device for a fixed scale, which remedies, in part at least, the shortcomings or disadvantages of known devices. In particular, it is sought a portable device for hoisting a load along a fixed ladder, which is light, compact, safe to use, adaptable to different types of ladders in diameter and spacing bars, portable otherwise than by hand, which can be secured to the ladder quickly and with one hand, so as to allow an operator carrying the device to climb the ladder, to secure the device to scale, and continue its progression on scale, safely.
Selon un aspect de l’invention, il est proposé un dispositif de hissage qui comporte une potence comportant un mât et un bras de charge escamotable le long du mât, des moyens d’engagement (d’accrochage) réversible du mât avec deux barreaux d’une échelle, un organe de port du dispositif, et une traverse d’appui sur l’un des barreaux, l’organe de port et la traverse étant solidaires du mât.  According to one aspect of the invention, there is provided a hoisting device which comprises a bracket comprising a mast and a load arm retractable along the mast, means of engagement (hanging) reversible mast with two bars of a ladder, a port member of the device, and a support beam on one of the bars, the port member and the cross member being integral with the mast.
Les moyens d’engagement réversible du mât avec deux barreaux d’une échelle comportent de préférence un premier organe d’accrochage à un premier barreau d’échelle (qui est désigné ci-après « barreau supérieur »), qui est fixé au mât de préférence rigidement, et un second organe d’accrochage à un second barreau d’échelle (qui est désigné ci- après « barreau inférieur » et est sensiblement parallèle au premier barreau d’échelle), qui est monté mobile par rapport au mât, de sorte que les moyens d’engagement réversible sont ajustables (déformables), et les moyens d’engagement réversible comportent des moyens de rappel des organes d’accrochage l’un vers l’autre.  The reversible engagement means of the mast with two bars of a ladder preferably comprise a first attachment member to a first ladder rung (which is hereinafter referred to as "upper rung"), which is attached to the mast of the ladder. preferably rigidly, and a second attachment member to a second ladder rung (which is hereinafter referred to as "lower rung" and is substantially parallel to the first ladder rung), which is movably mounted relative to the mast, of so that the reversible engagement means are adjustable (deformable), and the reversible engagement means comprise means for biasing the fastening members towards one another.
En d’autres termes et selon un autre aspect de l’invention, il est proposé un dispositif de hissage qui comporte :  In other words and according to another aspect of the invention, there is provided a hoisting device which comprises:
- un mât présentant un axe longitudinal ;  a mast having a longitudinal axis;
- une flèche - ou bras de charge - solidaire du mât au voisinage d’une première extrémité longitudinale (ou sommet) du mât ;  - An arrow - or load arm - secured to the mast in the vicinity of a first longitudinal end (or top) of the mast;
- un organe de port du dispositif qui est solidaire du mât ;  a device carrying member which is integral with the mast;
- une pièce d’appui (sur un barreau supérieur) solidaire du mât, qui s’étend transversalement (par rapport à l’axe longitudinal), et qui porte (ou comporte) un premier organe d’accrochage (au barreau supérieur) s’étendant de part et d’autre du mât, de préférence sensiblement symétriquement par rapport à l’axe longitudinal ; - a support piece (on an upper bar) secured to the mast, which extends transversely (relative to the longitudinal axis), and door (or comprises) a first attachment member (to the upper bar) extending on either side of the mast, preferably substantially symmetrically with respect to the longitudinal axis;
- un second organe d’accrochage (au barreau inférieur) monté coulissant par rapport au mât, au voisinage d’une seconde extrémité longitudinale (ou base) du mât ;  - A second attachment member (the lower bar) slidably mounted relative to the mast, in the vicinity of a second longitudinal end (or base) of the mast;
- un organe de rappel du second organe d’accrochage vers le premier organe d’accrochage;  - A return member of the second latching member to the first latching member;
et dans lequel la flèche est escamotable le long du mât, pouvant passer d’une configuration déployée dans laquelle l’extrémité libre de la flèche s’étend à une première distance de l’axe longitudinal, à une configuration escamotée dans laquelle l’extrémité libre de la flèche s’étend à une seconde distance de l’axe longitudinal qui est inférieure à la première distance.  and wherein the boom is retractable along the mast, capable of passing from an expanded configuration in which the free end of the boom extends at a first distance from the longitudinal axis, to a retracted configuration in which the end free of the arrow extends to a second distance from the longitudinal axis which is less than the first distance.
Chacun des organes d’accrochage peut présenter une forme de languette coudée, de crochet, ou de cavalier, la forme et les dimensions de chaque organe d’accrochage étant adaptées/ choisies pour que l’organe puisse chevaucher (ou entourer partiellement) une portion longitudinale d’un barreau d’échelle, de façon à retenir le dispositif au contact du barreau d’échelle.  Each of the attachment members may have a form of bent tongue, hook, or rider, the shape and dimensions of each attachment member being adapted / selected so that the member can overlap (or partially surround) a portion longitudinal scale bar, so as to hold the device in contact with the ladder bar.
L’invention permet de disposer, lorsque la flèche est escamotée, d’un dispositif compact, de forme élancée et équilibrée, qui peut facilement être saisi et manipulé d’une seule main par un opérateur se tenant debout sur l’échelle et saisissant le dispositif par le mât, aussi bien pour l’engager sur son épaule que pour le dégager de son épaule, pour le solidariser à deux barreaux parallèles par déformation (extension) des moyens d’engagement réversible, et pour le désolidariser des barreaux par une manipulation en sens inverse.  The invention makes it possible to have, when the boom is retracted, a compact device, slender and balanced shape, which can easily be grasped and manipulated with one hand by an operator standing on the ladder and grasping the device by the mast, both to engage on his shoulder than to release it from his shoulder, to secure it to two parallel bars by deformation (extension) reversible engagement means, and to separate the bars by manipulation reverse.
L’organe de port du dispositif peut comporter ou être essentiellement constitué par un premier lien déformable, de forme allongée, par exemple une sangle ou bande en matériau textile, dont les deux extrémités sont solidarisées au mât, de préférence respectivement au voisinage des deux extrémités du mât. The wearing member of the device may comprise or consist essentially of a first deformable link, of elongated shape, for example a strap or strip of textile material, whose two ends are secured to the mast, preferably respectively in the vicinity of both ends of the mast.
Le premier lien déformable peut être élastique ; alternativement, la longueur du lien peut être supérieure à la distance séparant les deux points de fixation du lien au mât, de sorte qu’un opérateur peut engager son bras entre le mât et le lien jusqu’à suspendre le dispositif à son épaule, le lien formant alors une bretelle.  The first deformable link can be elastic; alternatively, the length of the link may be greater than the distance between the two attachment points of the link to the mast, so that an operator can engage his arm between the mast and the link to suspend the device to his shoulder, the link forming a strap.
Selon un mode de réalisation, l’extension des moyens d’engagement réversible s’accompagne d’une élongation d’un organe de rappel (tel qu’un ressort) des moyens de rappel. Alternativement, cette extension s’accompagne d’une compression de cet organe de rappel.  According to one embodiment, the extension of the reversible engagement means is accompanied by an elongation of a return member (such as a spring) of the biasing means. Alternatively, this extension is accompanied by compression of this return member.
L’extension des moyens d’engagement réversible peut être obtenue, après que le second organe d’accrochage ait été engagé avec le barreau inférieur, par une traction exercée par l’opérateur sur le mât, sensiblement selon l’axe longitudinal du mât et en direction du barreau supérieur, avec un effort de traction suffisant pour vaincre les forces de rappel exercées par les moyens de rappel ainsi que les forces de frottement lors du coulissement du second organe d’accrochage le long du mât.  The extension of the reversible engagement means can be obtained, after the second attachment member has been engaged with the lower bar, by traction exerted by the operator on the mast, substantially along the longitudinal axis of the mast and towards the upper bar, with a sufficient traction force to overcome the restoring forces exerted by the biasing means and the frictional forces during sliding of the second fastening member along the mast.
L’intensité de cet effort de traction peut être situé dans une plage allant de un Newton (IN) environ jusqu’à dix Newton (ION) environ.  The intensity of this traction force can be in a range from about one Newton (IN) to about ten Newton (ION).
Le dispositif comporte un organe ou dispositif de verrouillage des moyens d’engagement réversible, en particulier un organe de blocage empêchant le coulissement du second organe d’accrochage le long du mât, tel qu’un levier de serrage à came.  The device comprises a member or device for locking reversible engagement means, in particular a locking member preventing the sliding of the second fastening member along the mast, such as a cam clamping lever.
La flèche escamotable et déployable peut comporter un ou deux bras articulé(s) sur le mât, en particulier un ou deux bras pivotant selon un ou deux axes de pivotement qui est (sont) sensiblement perpendiculaire (s) à l’axe longitudinal du mât, notamment parallèle(s) à l’axe longitudinal de la pièce d’appui.  The retractable and deployable boom may comprise one or two articulated arms (s) on the mast, in particular one or two arms pivoting along one or two pivot axes which is (are) substantially perpendicular (s) to the longitudinal axis of the mast , in particular parallel (s) to the longitudinal axis of the support piece.
Selon un mode de réalisation, la flèche comporte un bras tirant et un bras de charge. Alternativement, la flèche peut comporter un bras de charge et un tirant déformable, tel qu’un câble, qui relie le bras de charge au mât. According to one embodiment, the boom comprises a pulling arm and a load arm. Alternatively, the arrow may comprise an arm of load and a deformable tie, such as a cable, which connects the load arm to the mast.
Ceci permet d’escamoter la flèche par un pivotement du (ou des) bras par rapport au mât.  This allows to retract the boom by pivoting the (or) arm relative to the mast.
A cet effet notamment, une partie au moins du mât peut présenter, en section transversale, une concavité orientée vers le (s) bras de la flèche. Cette partie concave peut ainsi recevoir une partie du bras, en position d’escamotage de la flèche, tout en assurant la rigidité du mât.  For this purpose in particular, at least a portion of the mast may have, in cross section, a concavity oriented towards the (s) arm of the boom. This concave portion can thus receive a portion of the arm, in the retracted position of the boom, while ensuring the rigidity of the mast.
Le dispositif peut comporter un organe de fixation réversible mutuelle des deux bras de la flèche, tel qu’une goupille, cet organe de fixation étant maintenu solidaire du dispositif, en particulier solidaire du bras de charge, par un second lien déformable tel qu’une câblette.  The device may comprise a mutually reversible fastener of the two arms of the boom, such as a pin, this fastener being secured to the device, in particular integral with the load arm, by a second deformable link such as a cablet.
Le dispositif peut comporter un organe de verrouillage de l’organe de fixation réversible mutuelle des deux bras, qui peut être solidaire de - en particulier intégré à - l’organe de fixation mutuelle des bras, cet organe de verrouillage étant par exemple constitué par une bille d’une goupille à bille de sécurité.  The device may comprise a locking member of the mutual reversible fastener of the two arms, which may be integral with - in particular integrated with - the mutual attachment member of the arms, this locking member being for example constituted by a ball of a safety ball pin.
Le dispositif peut en outre comporter une manille fixée au voisinage de l’extrémité libre de la flèche, et/ ou un mousqueton servant à suspendre une poulie de levage à la manille et/ou à la flèche, la poulie pouvant comporter un frein pour un câble ou une corde de hissage engagé(e) dans la poulie.  The device may further comprise a shackle fixed in the vicinity of the free end of the boom, and / or a carabiner for suspending a lifting pulley at the shackle and / or the boom, the pulley possibly comprising a brake for a cable or hoisting rope engaged in the pulley.
L’invention permet d’obtenir un dispositif de hissage compact, léger, et facile à porter à l’épaule. En particulier, les dimensions des pièces du dispositif de hissage et les matériaux choisis pour les réaliser peuvent permettre d’obtenir un dispositif dont la masse est inférieure à 5 ou 10 kilogramme, le dispositif permettant de hisser une charge de plusieurs dizaines de kilogramme.  The invention provides a compact hauling device, lightweight, and easy to wear on the shoulder. In particular, the dimensions of the parts of the hauling device and the materials chosen to achieve them can provide a device whose mass is less than 5 or 10 kilograms, the device for hoisting a load of several tens of kilograms.
Un procédé d’installation du dispositif sur une échelle peut comporter les opérations suivantes :  A method of installing the device on a scale may include the following:
- porter le dispositif à l’épaule, sur le devant du corps ; - gravir une échelle jusqu’au voisinage d’une plateforme qui peut être prévue au voisinage du sommet de l’échelle ; - wear the device on the shoulder, on the front of the body; - climbing a ladder to the vicinity of a platform that can be provided near the top of the ladder;
- engager l’organe d’accrochage mobile sous un barreau « inférieur » de l’échelle s’étendant sensiblement au niveau de la taille de l’opérateur ;  - Engage the mobile attachment member under a "lower" bar of the scale extending substantially at the size of the operator;
- en tenant le dispositif d’une main par le mât, provoquer l’extension des moyens d’engagement réversible puis engager l’organe d’accrochage fixe sur un barreau « supérieur » de l’échelle, en rabattant le mât contre ce barreau ;  - By holding the device with one hand by the mast, cause the extension of the reversible engagement means and engage the fixed fastening member on an "upper" bar of the scale, by folding the mast against the bar ;
- verrouiller les moyens d’engagement réversible ; puis, l’opérateur se tenant sur la plateforme :  - lock the reversible engagement means; then, the operator standing on the platform:
- déployer la potence ;  - deploy the gallows;
- accoupler le bras de charge au tirant par la goupille à bille ; et - couple the load arm to the tie rod by the ball pin; and
- suspendre une poulie de levage au bras de charge. - Hang a lifting pulley on the load arm.
Inversement, un procédé de dépose du dispositif peut comporter les opérations suivantes :  Conversely, a method of removing the device may comprise the following operations:
- séparer la poulie de levage du bras de charge ;  - separate the lifting pulley from the load arm;
- désaccoupler le bras de charge du tirant par extraction de la goupille à bille, de sorte que le bras de charge et le tirant pivotent et s’escamotent le long du mât ; puis, l’opérateur se positionnant sur l’échelle devant le dispositif :  - Uncouple the load arm of the tie rod by extracting the ball pin, so that the load arm and the tie pivot and retract along the mast; then, the operator is positioned on the scale in front of the device:
- mettre l’organe de port à l’épaule ;  - put the wearing organ on the shoulder;
- déverrouiller les moyens d’engagement réversible ;  - Unlock the reversible engagement means;
- en tenant le dispositif d’une main par le mât, provoquer l’extension des moyens d’engagement réversible puis dégager l’organe d’accrochage fixe du barreau « supérieur » de l’échelle, en écartant la partie supérieure du mât de ce barreau ; puis  - By holding the device with one hand by the mast, cause the extension of the reversible engagement means and then release the fixed attachment member of the "upper" bar of the scale, by removing the upper part of the mast. this bar; then
- dégager l’organe d’accrochage mobile de sous le barreau « inférieur » de l’échelle.  - Release the movable fastener from under the "lower" bar of the scale.
D’autres aspects, caractéristiques, et avantages de l’invention apparaissent dans la description suivante qui se réfère aux figures annexées et illustre, sans aucun caractère limitatif, des modes de réalisation de l’invention. Other aspects, features, and advantages of the invention appear in the following description which refers to the figures annexed and illustrates, without any limiting character, embodiments of the invention.
BREVE DESCRIPTION DES FIGURES  BRIEF DESCRIPTION OF THE FIGURES
La figure 1 illustre, en vue en perspective, un dispositif de hissage dont la flèche est déployée. La figure 2 est une vue en perspective sous un autre angle du dispositif illustré figure 1.  Figure 1 illustrates, in perspective view, a hoisting device whose boom is deployed. Figure 2 is a perspective view from another angle of the device shown in Figure 1.
La figure 3 illustre, en vue de côté, le dispositif de hissage illustré figures 1 et 2.  Figure 3 illustrates, in side view, the hoisting device illustrated in Figures 1 and 2.
Chacune des figures 1 à 3 comporte en outre, en partie inférieure de la figure, un arrachement illustrant une position extrême de l’organe inférieur mobile d’accrochage du dispositif à un barreau d’échelle.  Each of Figures 1 to 3 further comprises, in the lower part of the figure, a cutaway illustrating an end position of the movable lower member hooking the device to a ladder bar.
La figure 4 illustre, en vue de côté, le dispositif illustré figure 3 dans une configuration d’escamotage de la flèche obtenue par inclinaison des bras de la flèche le long du mât du dispositif.  Figure 4 illustrates, in side view, the device shown in Figure 3 in a retraction configuration of the boom obtained by inclining the arms of the arrow along the mast of the device.
La figure 5 illustre, en vue de dessus, le dispositif illustré figure 3 et est une vue selon V de la figure 3.  FIG. 5 illustrates, in plan view, the device illustrated in FIG. 3 and is a view along V of FIG.
La figure 6 illustre schématiquement une opération d’engagement d’un organe inférieur d’accrochage du dispositif de hissage avec un barreau d’échelle inférieur, et la figure 7 illustre schématiquement une opération ultérieure d’engagement d’un organe supérieur d’accrochage et d’appui du dispositif de hissage avec un autre barreau s’étendant au- dessus du barreau inférieur.  FIG. 6 schematically illustrates an operation of engagement of a lower fastening member of the hoisting device with a lower ladder rung, and FIG. 7 schematically illustrates a subsequent operation of engagement of an upper fastening member. and supporting the hoisting device with another bar extending above the lower bar.
La figure 8 illustre schématiquement une opération de hissage d’un objet à l’aide d’un dispositif de hissage solidarisé aux deux barreaux supérieurs d’une échelle « non débouchante », c.à.d. dont le sommet s’étend au niveau d’une plateforme sur laquelle peut se tenir un opérateur, et la figure 9 illustre schématiquement une opération de hissage d’un objet à l’aide d’un dispositif de hissage solidarisé à deux barreaux successifs d’une échelle « débouchante », c.à.d. dont le sommet s’étend au dessus d’une plateforme sur laquelle peut se tenir un opérateur.  FIG. 8 schematically illustrates an operation of hoisting an object using a hoisting device secured to the two upper bars of a "non-opening" ladder, ie whose summit extends at a platform on which an operator can stand, and FIG. 9 schematically illustrates an operation of hoisting an object using a hoisting device secured to two successive bars of 'an open ladder', ie whose summit extends over a platform on which can be held an operator.
DESCRIPTION DETAILLEE DE L'INVENTION Sauf indication explicite ou implicite contraire, des éléments ou organes - structurellement ou fonctionnellement - identiques ou similaires, sont désignés par des repères identiques sur les différentes figures. DETAILED DESCRIPTION OF THE INVENTION Unless otherwise explicitly or implicitly stated, elements or members - structurally or functionally identical or similar - are designated by identical reference numerals in the different figures.
Par référence aux figures 1 à 9, le dispositif 10 sert à hisser une charge repérée 104 figures 8 et 9, qui est suspendue à un lien déformable tel qu’une corde, le long d’une échelle 102 fixe comportant à minima deux barreaux 100, 101 superposés auxquels le dispositif 10 est solidarisé temporairement à cet effet.  With reference to FIGS. 1 to 9, the device 10 is used to hoist a load 104 (FIGS. 8 and 9), which is suspended from a deformable link such as a rope, along a fixed scale 102 comprising at least two bars 100 , 101 superimposed to which the device 10 is temporarily secured for this purpose.
Le dispositif 10 comporte une potence 20 comportant un mât 21 s’étendant selon un axe 70 longitudinal, et deux bras 22, 23 articulés par rapport au mât et formant une flèche escamotable le long du mât.  The device 10 comprises a bracket 20 comprising a mast 21 extending along a longitudinal axis 70, and two arms 22, 23 articulated with respect to the mast and forming a retractable boom along the mast.
Pour le hissage d’une charge, une traction est effectuée par un opérateur sur une corde (non représentée) engagée dans une poulie (non représentée) suspendue à la flèche 22, 23.  For hoisting a load, traction is performed by an operator on a rope (not shown) engaged in a pulley (not shown) suspended from the boom 22, 23.
A cet effet le dispositif peut comporter, comme illustré figures 1 à 3, une manille 90 fixée au voisinage de l’extrémité 25 libre de la flèche, et un mousqueton suspendu à la manille et soutenant la poulie de levage.  For this purpose the device may comprise, as shown in Figures 1 to 3, a shackle 90 fixed in the vicinity of the free end of the boom, and a carabiner suspended from the shackle and supporting the hoisting pulley.
La poulie peut comporter un frein pour la corde de hissage engagée dans la poulie.  The pulley may include a brake for the hoisting rope engaged in the pulley.
Dans les modes de réalisation illustrés figures 1 à 5, le mât 21 est constitué d’une barre dont la section transversale présente une forme de « U ».  In the embodiments illustrated in Figures 1 to 5, the mast 21 consists of a bar whose cross section has a shape of "U".
Le bras supérieur 23, servant de tirant, est fixé à l’extrémité supérieure 74 du mât 21, entre les ailes du profilé 21 en U, par un pivot d’axe 72 perpendiculaire à l’axe 70.  The upper arm 23, acting as a tie rod, is fixed to the upper end 74 of the mast 21, between the flanges of the U-shaped section 21, by a pivot pin 72 perpendicular to the axis 70.
Le bras inférieur 22, servant de bras de charge et à l’extrémité libre duquel est fixée la manille 90, est fixé à distance de l’extrémité supérieure 74 du mât 21, entre les ailes du profilé 21 en U, par un pivot d’axe 71 parallèle à l’axe 72.  The lower arm 22, serving as load arm and at the free end of which is fixed the shackle 90, is fixed at a distance from the upper end 74 of the mast 21, between the flanges of the U-shaped section 21, by a pivot pin. 71 axis parallel to the axis 72.
Les bras 22, 23 peuvent ainsi s’étendre en partie entre les ailes du profilé 21 en U, le long de ce profilé, lorsque leurs extrémités libres respectives ont été mutuellement désolidarisées, comme illustré figures 4, 6, et 7. The arms 22, 23 may thus extend in part between the flanges of the U-shaped section 21, along this section, when their free ends respective ones have been mutually separated, as illustrated in FIGS. 4, 6 and 7.
Chaque bras 22, 23 comporte respectivement une chape 26, 27 (cf. figure 4) percée d’un orifice de passage d’un goupille 80 à bille (cf. figure 3 notamment) servant d’organe de fixation mutuelle réversible des bras 22, 23.  Each arm 22, 23 respectively comprises a yoke 26, 27 (see FIG. 4) pierced with a hole for the passage of a pin 80 with a ball (see FIG. 3 in particular) serving as a reversible mutual fastening member for the arms 22. , 23.
Pour déployer la flèche, l’opérateur fait pivoter les bras 22, 23, depuis leur position escamotée le long du mât jusqu’à une position déployée illustrée figure 1 à 3 et 5, position dans laquelle les orifices des chapes 26, 27 sont alignés de sorte que l’opérateur peut engager la goupille 80 dans ces orifices.  To deploy the boom, the operator pivots the arms 22, 23, from their retracted position along the mast to an extended position shown in FIGS. 1 to 3 and 5, in which position the orifices of the yokes 26, 27 are aligned. so that the operator can engage the pin 80 in these orifices.
Pour éviter la chute ou la perte de la goupille lorsque celle-ci n’est pas engagée dans les orifices des chapes, la goupille est reliée à une des pièces du dispositif par un lien déformable 81 (cf. figure 3) ; la goupille est par exemple reliée, par le lien 81, à une autre chape 28 prévue sur le bras 22.  To prevent the fall or loss of the pin when it is not engaged in the openings of the yokes, the pin is connected to one of the parts of the device by a deformable link 81 (see Figure 3); the pin is for example connected, by the link 81, to another clevis 28 provided on the arm 22.
Pour éviter la sortie intempestive de la goupille 80 hors des chapes, la goupille comporte un organe de verrouillage formé par une bille.  To prevent the accidental release of the pin 80 from the yokes, the pin comprises a locking member formed by a ball.
Le dispositif 10 comporte une traverse 50 (cf. Figure 2 notamment) d’appui et d’accrochage sur un barreau d’échelle, qui est fixée rigidement au bras 21, dans une portion sensiblement « centrale » du mât, c.à.d. dans une portion intermédiaire entre les extrémités supérieure 74 et inférieure 75 du mât.  The device 10 comprises a crosspiece 50 (see FIG. 2 in particular) for supporting and hooking on a ladder rung, which is fixed rigidly to the arm 21, in a substantially "central" portion of the mast, ie d. in an intermediate portion between the upper ends 74 and lower 75 of the mast.
La traverse 50 s’étend selon un axe 73 transversal (par référence à l’axe 70) qui est parallèle aux axes 71, 72 de pivotement des bras.  The crosspiece 50 extends along a transverse axis 73 (with reference to the axis 70) which is parallel to the axes 71, 72 of pivoting arms.
Les bras 22, 23 s’étendent d’un premier coté du mât 21, tandis que la traverse 50 s’étend d’un second coté du mât opposé au premier coté.  The arms 22, 23 extend from one side of the mast 21, while the cross member 50 extends from a second side of the mast opposite the first side.
La traverse 50 comporte - et est essentiellement constituée par - trois ailes planes (cf. figure 4 notamment) allongées le long de l’axe 73 :  The crosspiece 50 comprises - and essentially consists of - three flat wings (see Figure 4 in particular) elongated along the axis 73:
- une première aile 34 sert à fixer (rigidement) la traverse 50 au mât 21 ; - une aile « centrale » 31, qui forme un angle droit avec l’aile 34 de façon à s’étendre dans un plan perpendiculaire à l’axe 70 du mât ; et- A first flange 34 serves to fix (rigidly) the cross member 50 to the mast 21; a "central" wing 31, which forms a right angle with the wing 34 so as to extend in a plane perpendicular to the axis 70 of the mast; and
- une troisième aile 32, qui forme un angle obtus avec l’aile 34, sert à retenir la traverse 50 (et le dispositif 10) engagée avec le barreau 100 tant que la traverse repose sur ce barreau. - A third flange 32, which forms an obtuse angle with the flange 34, serves to retain the cross member 50 (and the device 10) engaged with the bar 100 as the cross rests on this bar.
L’aile centrale 31 peut servir de surface d’appui sur un barreau 100 supérieur d’échelle, lorsque le diamètre de ce barreau est inférieur ou égal à la largeur de l’aile 31. Dans le cas contraire, la traverse 50 d’appui et d’accrochage prend appui sur le barreau 100 par ses deux ailes latérales 32 et 34.  The central wing 31 can serve as a bearing surface on a bar 100 of upper scale, when the diameter of this bar is less than or equal to the width of the wing 31. In the opposite case, the crossbar 50 of support and hooking bears on the bar 100 by its two lateral wings 32 and 34.
La longueur de la traverse 50 est supérieure à la largeur du mât pour assurer un appui et un accrochage stables du dispositif sur le barreau 100.  The length of the crossbar 50 is greater than the width of the mast to ensure a stable support and attachment of the device on the bar 100.
Comme illustré figure 2, la partie centrale de l’aile 32 d’accrochage est munie d’une découpe 32a servant à réduire la masse de la traverse. En conséquence, l’aile 32 d’accrochage comporte deux languettes saillantes s’étendant respectivement aux deux extrémités longitudinales de la traverse 50, de sorte que ces languettes d’accrochage s’étendent de part et d’autre du mât.  As illustrated in FIG. 2, the central part of the attachment wing 32 is provided with a cutout 32a serving to reduce the mass of the crossmember. Consequently, the fastening flange 32 comprises two projecting tabs extending respectively at the two longitudinal ends of the crossmember 50, so that these attachment tabs extend on either side of the mast.
Comme illustré figures 2 et 3 notamment, la traverse 50 présente une forme de cavalier dont la concavité est dirigée vers l’extrémité inférieure 75 du mât.  As shown in Figures 2 and 3 in particular, the cross member 50 has a jumper shape whose concavity is directed towards the lower end 75 of the mast.
Le dispositif 10 comporte un second organe 33 d’accrochage avec un second barreau 101 d’échelle parallèle au premier barreau 100 d’échelle, qui est fixé rigidement à une lame 29 montée coulissante par rapport au mât, entre les ailes du mât et contre l’âme du mât, le long de l’axe longitudinal 70 du mât, au voisinage de l’extrémité 75 inférieure du mât, de sorte que l’organe 33 d’accrochage est mobile (coulissant) par rapport au mât 21.  The device 10 comprises a second attachment member 33 with a second bar 101 of scale parallel to the first scale bar 100, which is fixed rigidly to a blade 29 slidably mounted relative to the mast, between the wings of the mast and against the core of the mast, along the longitudinal axis 70 of the mast, near the lower end 75 of the mast, so that the fastening member 33 is movable (sliding) relative to the mast 21.
L’organe mobile 33 d’accrochage s’étend en regard de la traverse 50 et présente une forme de cavalier évasé vers le haut, dont la concavité est dirigée vers l’extrémité supérieure 74 du mât et vers la traverse 50. Comme illustré figures 2 à 4, l’organe mobile 33 d’accrochage est formé de trois ailes planes parallèles à l’axe 73, et présente une section transversale identique à celle de la traverse 50. The mobile attachment member 33 extends opposite the cross member 50 and has an upwardly flared jumper shape, the concavity of which is directed towards the upper end 74 of the mast and towards the cross member 50. As illustrated in FIGS. 2 to 4, the mobile attachment member 33 is formed of three flat wings parallel to the axis 73, and has a cross section identical to that of the crossmember 50.
La forme et les dimensions de la traverse 50 et de l’organe mobile 33 d’accrochage sont adaptées pour que chacune de ces pièces 33, 50 puisse entourer partiellement une portion longitudinale d’un barreau d’échelle : la traverse 50 chevauche la partie supérieure d’une portion longitudinale du barreau supérieur 100, et l’organe mobile 33 d’accrochage entoure la partie inférieure d’une portion longitudinale du barreau inférieur 101 (cf. ligures 3 et 7 à 9).  The shape and dimensions of the crossmember 50 and the movable member 33 hooking are adapted so that each of these parts 33, 50 can partially surround a longitudinal portion of a ladder bar: the cross member 50 overlaps the portion upper portion of a longitudinal portion of the upper bar 100, and the movable member 33 hooking surrounds the lower portion of a longitudinal portion of the lower bar 101 (see Figures 3 and 7 to 9).
La forme évasée de la traverse 50 et de l’organe mobile 33 d’accrochage leur permet de s’adapter à des barreaux de différents diamètres par un auto-centrage.  The flared shape of the crosspiece 50 and the movable member 33 hooking allows them to adapt to bars of different diameters by self-centering.
Le dispositif 10 comporte également un organe de rappel constitué par un ressort 35 (cf. figures 6 et 7) dont une première extrémité est fixée à la lame 29 et dont une seconde extrémité est fixée au mât, de sorte que ce ressort est sollicité en traction lorsque l’organe mobile 33 d’accrochage est écarté de l’extrémité inférieure 75 du mât, comme illustré schématiquement sur les figures 1 à 3 et 6.  The device 10 also comprises a return member constituted by a spring 35 (see Figures 6 and 7), a first end is fixed to the blade 29 and a second end is fixed to the mast, so that the spring is biased in traction when the movable member 33 of attachment is spaced from the lower end 75 of the mast, as illustrated schematically in Figures 1 to 3 and 6.
Le ressort 35 sert à rappeler la lame 29 et l’organe 33 vers l’extrémité supérieure du mât, c.à.d. vers la traverse 50.  The spring 35 serves to return the blade 29 and the member 33 towards the upper end of the mast, ie. to the crossing 50.
Le ressort 35 permet l’auto maintien du dispositif à l’échelle lorsqu’il n’est pas verrouillé.  The spring 35 allows self-maintaining the device to scale when not locked.
De plus le ressort 35 sert également à auto adapter les organes d’appui et d’accrochage (31 à 34) en fonction de l’entraxe des barreaux d’échelle.  In addition the spring 35 is also used to self adapt the support members and attachment (31 to 34) depending on the distance between the ladder bars.
La lame 29 est percée d’une ouverture longitudinale au travers de laquelle s’étend une tige fixée à l’âme du mât et dont est solidaire un levier 24 à came 36 pivotant pouvant appuyer sur la lame 29.  The blade 29 is pierced with a longitudinal opening through which extends a rod fixed to the core of the mast and which is secured to a lever 24 to pivoting cam 36 which can press the blade 29.
Le levier 24 à came sert à empêcher, dans une première configuration (orientation) du levier, et inversement à permettre dans une seconde configuration (orientation) du levier, le coulissement de la lame 29 et du second organe 33 d’accrochage par rapport au mât. The cam lever 24 serves to prevent, in a first configuration (orientation) of the lever, and conversely to allow in a second configuration (orientation) of the lever, the sliding of the blade 29 and the second member 33 hooking relative to the mast.
La traverse 50 et ses organes d’appui et d’accrochage 31, 32, 34 peuvent être positionnés de façon excentrée sur le mat, c.à.d. plus près de l’extrémité 75 inférieure du mât que de l’extrémité supérieure 74, afin que la flèche du dispositif s’étende au dessus du palier 103 (ou plateforme illustrée figures 8 et 9), notamment lorsque l’échelle s’arrête au niveau du palier comme illustré figure 8, permettant ainsi à l’opérateur en charge de récupérer l’objet 104 et situé sur le palier, de saisir l’objet plus facilement.  The cross member 50 and its supporting and hooking members 31, 32, 34 can be positioned eccentrically on the mat, ie. closer to the lower end 75 of the mast than the upper end 74, so that the boom of the device extends above the bearing 103 (or platform shown in Figures 8 and 9), especially when the ladder stops at the level of the bearing as illustrated in FIG 8, allowing the operator in charge to recover the object 104 and located on the bearing, to grasp the object more easily.
Le dispositif 10 comporte en outre une sangle 40 de transport du dispositif (cf. figure 7), dont les deux extrémités 41, 42 sont solidarisées au mât, respectivement au voisinage des deux extrémités 74, 75du mât.  The device 10 further comprises a strap 40 for transporting the device (see FIG. 7), the two ends 41, 42 of which are secured to the mast, respectively in the vicinity of the two ends 74, 75 of the mast.
A moins que la sangle 40 ne soit élastique, sa longueur est supérieure à la distance séparant ses deux points 41, 42 de fixation au mât.  Unless the strap 40 is elastic, its length is greater than the distance between its two points 41, 42 of attachment to the mast.
Le dispositif peut être utilisé de la façon suivante :  The device can be used as follows:
- un opérateur portant le dispositif 10 (dont la flèche est escamotée) à l’épaule (par exemple l’épaule gauche) par la sangle 40 gravit une échelle jusqu’à une hauteur déterminée, le dispositif étant soutenu à l’épaule, entre l’opérateur et l’échelle ;  - An operator wearing the device 10 (whose arrow is retracted) to the shoulder (for example the left shoulder) by the strap 40 climbs a ladder to a given height, the device being supported on the shoulder, between operator and scale;
- l’opérateur se tenant avec sa main ne correspondant pas à l’épaule portant le dispositif (par exemple sa main droite) serrée/accrochée à un barreau de l’échelle, sépare sa main opposée (sa main gauche) de l’échelle, saisit le dispositif par son mât, d’une main (de sa main gauche), en conservant la sangle à l’épaule afin d’éviter une chute accidentelle du dispositif ;  - the operator standing with his hand not corresponding to the shoulder carrying the device (for example his right hand) tight / attached to a rung of the ladder, separates his opposite hand (his left hand) from the ladder , grasps the device by its mast, with one hand (of his left hand), keeping the strap on the shoulder in order to avoid an accidental fall of the device;
- l’opérateur engage l’organe 33 inférieur mobile d’accrochage du dispositif sous un barreau 101 d’échelle s’étendant par exemple légèrement au dessus de sa ceinture, en maintenant (par sa main gauche) le mât incliné comme illustré figure 6, c.à.d. dont l’extrémité supérieure 74 s’étend à distance des barreaux de l’échelle, entre l’échelle et le torse de l’opérateur ; the operator engages the mobile lower attachment member 33 of the device under a ladder bar 101 extending for example slightly above its belt, while maintaining (with its left hand) the inclined mast as illustrated in FIG. , i.e. whose end upper 74 extends away from the bars of the ladder, between the scale and the torso of the operator;
- l’opérateur exerce alors (par sa main gauche) une traction verticale ascendante sur le mât illustrée figure 6 par la flèche 95, qui est suffisante pour provoquer l’extension du ressort 35 et le coulissement de la lame 29 et de l’organe 33 inférieur d’accrochage, par rapport au mât, jusqu’à la configuration illustrée figure 6 dans laquelle les organes 31, 32 supérieurs d’engagement s’étendent au-dessus du barreau 100 surplombant le barreau 101 avec lequel est engagé l’organe 33 ;  the operator then exerts (by his left hand) an upward vertical pull on the mast illustrated in FIG. 6 by the arrow 95, which is sufficient to cause the extension of the spring 35 and the sliding of the blade 29 and the member 33 lower attachment, relative to the mast, to the configuration shown in Figure 6 wherein the upper members 31, 32 of engagement extend above the bar 100 overhanging the bar 101 with which is engaged the organ 33;
- dans cette configuration, l’opérateur plaque (par sa main gauche), par un mouvement de pivotement illustrée figure 6 par la flèche 96, le mât contre les barreaux d’échelle, puis relâche son effort de traction (95) de sorte que les organes 31, 32, 34 d’engagement s’engagent avec le barreau 100 et que la traverse 50 vienne en appui sur ce barreau ;  in this configuration, the plate operator (by his left hand), by a pivoting movement illustrated in FIG. 6 by the arrow 96, the mast against the ladder rungs, then releases his traction force (95) so that the engagement members 31, 32, 34 engage with the bar 100 and the cross member 50 bears on the bar;
- l’opérateur peut alors lâcher le mât du dispositif, faire coulisser la sangle le long de son bras (gauche), et verrouiller (par sa main gauche) le coulissement de la lame 29 en agissant sur le levier 24 à came 36 ;  the operator can then release the mast of the device, slide the strap along its arm (left), and lock (by its left hand) the sliding of the blade 29 by acting on the cam lever 24;
- l’opérateur peut ensuite continuer sa progression sur l’échelle jusqu’à une plateforme proche du sommet du mât (et de l’échelle), déployer ensuite la flèche de la potence, verrouiller l’assemblage mutuel des bras 22, 23 par la goupille à bille, engager un mousqueton portant une poulie dans la manille suspendue à la flèche, et engager une corde de levage dans la poulie.  the operator can then continue his progression on the ladder to a platform near the top of the mast (and the ladder), then deploy the boom of the bracket, lock the mutual assembly of the arms 22, 23 by the ball pin, engage a carabiner bearing a pulley in the shackle hanging from the boom, and engage a lifting rope into the pulley.
Un second opérateur situé à un niveau inférieur, en bas de l’échelle, peut alors procéder au levage d’une charge suspendue à la corde de levage.  A second operator at a lower level at the bottom of the ladder can then lift a load suspended from the lifting rope.
Une fois la charge déposée sur la plateforme, l’opérateur peut procéder, dans un ordre inverse au précédent, aux opérations inverses pour escamoter la flèche, remettre la sangle du dispositif à l’épaule, puis désolidariser le dispositif de l’échelle.  Once the load deposited on the platform, the operator can proceed, in reverse order to the previous one, the reverse operations to retract the boom, put the strap of the device to the shoulder, and then disengage the device from the ladder.

Claims

Revendications  claims
1 - Dispositif (10) de hissage caractérisé en ce qu’il comporte :1 - Device (10) hoisting characterized in that it comprises:
- une potence (20) comportant un mât (21) et un bras (22, 23) de charge - ou flèche - escamotable le long du mât ; - A bracket (20) having a mast (21) and an arm (22, 23) load - or boom - retractable along the mast;
- des moyens (30) d’engagement réversible du mât avec deux barreaux (100, 101) d’une échelle ;  means (30) for reversibly engaging the mast with two bars (100, 101) of a ladder;
- un organe (24) de verrouillage des moyens d’engagement réversible ;  a member (24) for locking the reversible engagement means;
- un organe (40) de port à l’épaule du dispositif ; et  an organ (40) for carrying the device at the shoulder; and
- une traverse (50) d’appui sur l’un des barreaux,  a support beam (50) on one of the bars,
et en ce que l’organe de port et la traverse sont solidaires du mât. and in that the port member and the cross member are integral with the mast.
2 - Dispositif selon la revendication 1 dans lequel les moyens (30) d’engagement réversible du mât avec deux barreaux d’une échelle comportent un premier organe (31, 32, 34) d’accrochage à un premier barreau (100) d’échelle, qui est fixé au mât, un second organe (33) d’accrochage à un second barreau (101) d’échelle qui est monté mobile par rapport au mât, et des moyens (35) de rappel des organes (31 à 34) d’accrochage l’un vers l’autre. 2 - Device according to claim 1 wherein the means (30) of reversible engagement of the mast with two bars of a ladder comprise a first member (31, 32, 34) for attachment to a first bar (100) of scale, which is fixed to the mast, a second member (33) for attachment to a second ladder bar (101) which is mounted to move relative to the mast, and means (35) for returning the members (31 to 34 ) hooking towards each other.
3 - Dispositif selon la revendication 1 ou 2 dans lequel :  3 - Device according to claim 1 or 2 wherein:
- le mât présente un axe (70) longitudinal ;  the mast has a longitudinal axis (70);
- le bras de charge - ou flèche - est solidaire du mât au voisinage d’une première extrémité (74) longitudinale du mât ;  - The load arm - or boom - is secured to the mast in the vicinity of a first end (74) of the longitudinal mast;
- la traverse (50) d’appui s’étend transversalement (73) par rapport à l’axe (70) longitudinal, et porte (ou comporte) un premier organe (31, 32, 34) d’accrochage à un premier barreau (100) d’échelle qui s’étend de part et d’autre du mât, de préférence sensiblement symétriquement par rapport à l’axe (70) longitudinal ;  the support crosspiece (50) extends transversely (73) with respect to the longitudinal axis (70) and carries (or comprises) a first member (31, 32, 34) for attaching to a first bar Scale (100) which extends on either side of the mast, preferably substantially symmetrically with respect to the longitudinal axis (70);
- le dispositif comporte un second organe (33) d’accrochage à un second barreau (101) d’échelle parallèle au premier barreau d’échelle, ledit second organe (33) d’accrochage étant monté coulissant par rapport au mât, au voisinage d’une seconde extrémité (75) longitudinale du mât ; - The device comprises a second member (33) for attachment to a second bar (101) of scale parallel to the first scale bar, said second member (33) of attachment being slidably mounted by relative to the mast, in the vicinity of a second longitudinal end (75) of the mast;
- le dispositif comporte un organe (35) de rappel du second organe (33) d’accrochage vers le premier organe (31, 32, 34) d’accrochage;  - The device comprises a member (35) for returning the second member (33) for hooking to the first member (31, 32, 34) of attachment;
- la flèche escamotable peut passer d’une configuration déployée dans laquelle l’extrémité libre de la flèche s’étend à une première distance de l’axe (70) longitudinal, à une configuration escamotée dans laquelle l’extrémité libre de la flèche s’étend à une seconde distance de l’axe (70) longitudinal qui est inférieure à la première distance ;  the retractable boom can pass from an expanded configuration in which the free end of the boom extends at a first distance from the longitudinal axis (70), to a retracted configuration in which the free end of the boom is extends at a second distance from the longitudinal axis (70) which is less than the first distance;
la forme et les dimensions de chaque organe (31 à 34) d’accrochage étant adaptées pour que l’organe d’accrochage puisse chevaucher ou entourer partiellement une portion d’un barreau (100, 101) d’échelle.  the shape and dimensions of each member (31 to 34) of attachment being adapted so that the attachment member can overlap or partially surround a portion of a bar (100, 101) scale.
4 - Dispositif selon l’une quelconque des revendications 1 à 3 dans lequel l’organe (40) de port comporte- ou est essentiellement constitué par - un premier lien déformable dont les deux extrémités sont solidarisées au mât, de préférence respectivement au voisinage des deux extrémités (74, 75) du mât, et dont la longueur peut être supérieure à la distance séparant les deux points de fixation du lien au mât.  4 - Device according to any one of claims 1 to 3 wherein the member (40) port comprises- or consists essentially of - a first deformable link whose two ends are secured to the mast, preferably respectively in the vicinity of two ends (74, 75) of the mast, and whose length may be greater than the distance between the two attachment points of the link to the mast.
5 - Dispositif selon l’une quelconque des revendications 2 à 4 dans lequel l’organe (24) de verrouillage est un organe de blocage empêchant le coulissement du second organe (33) d’accrochage, tel qu’un levier de serrage à came.  5 - Device according to any one of claims 2 to 4 wherein the locking member (24) is a locking member preventing the sliding of the second member (33) hooking, such as a cam clamping lever .
6 - Dispositif selon l’une quelconque des revendications 1 à 5 dans lequel la potence (20) comporte un ou deux bras (22, 23) articulé (s) sur le mât (21), en particulier un ou deux bras pivotant selon un ou deux axes (71, 72) de pivotement qui est (sont) sensiblement perpendiculaire(s) à l’axe (70) longitudinal du mât, notamment parallèle(s) à l’axe (73) longitudinal de la traverse (50) d’appui et d’accrochage. 7 - Dispositif selon l’une quelconque des revendications 1 à 6 dans lequel une partie au moins du mât (21) présente, en section transversale, une concavité orientée vers le(s) bras (22, 23), une partie au moins du mât pouvant présenter une section transversale en forme de « U » dont l’ouverture est orientée vers le(s) bras (22, 23). 6 - Device according to any one of claims 1 to 5 wherein the bracket (20) comprises one or two arms (22, 23) hinged (s) on the mast (21), in particular one or two pivoting arm according to a or two axes (71, 72) of pivoting which is (are) substantially perpendicular (s) to the axis (70) of the longitudinal mast, in particular parallel (s) to the axis (73) of the longitudinal cross member (50) support and hooking. 7 - Device according to any one of claims 1 to 6 wherein at least a portion of the mast (21) has, in cross section, a concavity oriented towards the (s) arm (22, 23), at least a portion of the mast which may have a U-shaped cross section whose opening is oriented towards the arm (s) (22, 23).
8 - Dispositif selon l’une quelconque des revendications 1 à 7 qui comporte un organe (80) de fixation réversible mutuelle de deux bras (22, 23) de la flèche, tel qu’une goupille, cet organe de fixation étant maintenu solidaire du dispositif, en particulier solidaire du bras (22) de charge, par un second lien (81) déformable tel qu’une câblette.  8 - Device according to any one of claims 1 to 7 which comprises a member (80) for mutually reversible attachment of two arms (22, 23) of the boom, such as a pin, said fastener being secured to the device, in particular integral with the load arm (22), by a second deformable link (81) such as a cable.
9 - Dispositif selon la revendication 8 qui comporte un organe de verrouillage de l’organe (80) de fixation réversible mutuelle des bras, qui est de préférence solidaire de - en particulier intégré à - l’organe (80) de fixation mutuelle des bras.  9 - Device according to claim 8 which comprises a locking member of the member (80) for mutually reversible attachment of the arms, which is preferably secured to - in particular integrated - the member (80) for mutual attachment of the arms .
EP18821702.0A 2017-11-22 2018-11-16 Portable hoisting device Active EP3713868B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1771246A FR3073834B1 (en) 2017-11-22 2017-11-22 PORTABLE HANDAGE DEVICE
PCT/FR2018/000251 WO2019102078A1 (en) 2017-11-22 2018-11-16 Portable hoisting device

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EP3713868A1 true EP3713868A1 (en) 2020-09-30
EP3713868B1 EP3713868B1 (en) 2021-09-22

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CN110127537B (en) * 2019-05-31 2024-03-08 中交一航局第二工程有限公司 Building template lifting device, cross-floor conveying system comprising building template lifting device and conveying method

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Publication number Priority date Publication date Assignee Title
FR1329419A (en) * 1962-07-24 1963-06-07 Lift adaptable on ladder
US20120061179A1 (en) * 2004-12-30 2012-03-15 Jody James English Telescoping ladder jack
US10260283B2 (en) * 2014-04-11 2019-04-16 Michael Gregory Stepladder based crane system

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FR3073834A1 (en) 2019-05-24
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ES2901691T3 (en) 2022-03-23
EP3713868B1 (en) 2021-09-22

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