EP1878688B1 - Device for lifting a load, in particular a framework beam or flashboard, comprising a chassis bearing a tilted mast and comprising means for rigidification and/or stabilisation - Google Patents

Device for lifting a load, in particular a framework beam or flashboard, comprising a chassis bearing a tilted mast and comprising means for rigidification and/or stabilisation Download PDF

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Publication number
EP1878688B1
EP1878688B1 EP07111127A EP07111127A EP1878688B1 EP 1878688 B1 EP1878688 B1 EP 1878688B1 EP 07111127 A EP07111127 A EP 07111127A EP 07111127 A EP07111127 A EP 07111127A EP 1878688 B1 EP1878688 B1 EP 1878688B1
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EP
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Prior art keywords
mast
lifting
load
ground
chassis
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EP07111127A
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German (de)
French (fr)
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EP1878688A1 (en
Inventor
Bernard Loizeau
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Mc Loizeau
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Mc Loizeau
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    • 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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • 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
    • B66C23/36—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 mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/48—Manually-movable jib cranes for use in workshops

Definitions

  • the field of the invention is that of load lifting equipment. More specifically, the invention relates to a mobile lifting device (rolling), relatively light structure, intended in particular, but not exclusively to the lifting of a frame member.
  • Some existing elevators have the ability to lift small farms and traditional timbers. However, all these devices are either oversized or undersized in relation to the scale of a traditional framing company.
  • Nacelles for their part, are designed to mount exclusively people and therefore must lift no load.
  • the crane comprises a chassis equipped with rolling means, a bridge fitted on the chassis and a manually operable winch carried by the bridge.
  • the crane also has a lifting mast hinged at the top of the bridge and provided at both ends with guide and return means for a lifting cable actuated from the winch.
  • the frame, the easel and the mast of this crane are constituted by polygonal cross-section tubes which allow a removable assembly by fitting and pinning, in the absence of any clamping element.
  • a counterweight consisting of a load is attached to the frame opposite the vertical bridge or bracket.
  • a major disadvantage of this crane lies in its general confirguration. Indeed, the upper end of the mast, in the upward position, is vertically outside the perimeter defined by the frame. Also, when the crane is in charge, its center of gravity tends to be deported outward of the perimeter defined by the frame, this despite the presence of counterweight.
  • such a crane has a weight, once assembled, of about 250 kg.
  • a weight makes the crane, equipped with wheels, difficult to move by people, especially on a site whose floor is classically irregular.
  • This weight is also detrimental when it is necessary to have a lifting assistance at the level of a floor, such a crane can only very difficult to be hoisted itself in height.
  • variable inclination of the mast involves significant risks in case of ineffective or faulty attachment, likely to lead to endangering people in the vicinity of the crane.
  • the invention particularly aims to overcome the disadvantages of the prior art.
  • the invention aims to provide a mobile load lifting device, light structure, which has a high stability, including load and under the effect of wind.
  • the invention also aims to provide such a device that can be brought and commissioned on a job site in a simple manner.
  • the invention also aims to provide such a device that can be moved easily on a site for repeated movements.
  • the invention also aims to provide such a device that can be hoisted at a floor of a building.
  • Yet another object of the invention is to provide such a device that is compliant in terms of security to the texts in force at the legal, normative and regulatory levels.
  • Yet another object of the invention is to provide such a device which is simple in design, easy to implement and inexpensive to produce.
  • a lifting device thus formed has great stability on the ground, including in the event of wind likely to cause a rocking movement of the lifted load.
  • a device according to the invention thus makes it possible to lift loads, such as as structural elements, in complete safety for the workers moving in the vicinity of the device, this in the respect of the legal, normative and regulatory texts.
  • the structure of the stiffening and / or stabilization means contributes to the good "sitting" on the ground of the device, this moreover ensuring a distribution and a dissipation of the stresses which make it possible to produce the device with relatively light structural elements (Calculated of course to ensure a satisfactory resistance of the whole).
  • this device called console can be made from light structural elements, we obtain a set of relatively reduced weight of the order of about 30 kg.
  • Such a lifting device can therefore be moved manually on site, from station to station, quickly and easily thanks to the wheels mounted on the axle and thanks to the near-equilibrium position of the system whose center of gravity is located in the vertical position. wheel axis.
  • a lifting device according to the invention to hoist it at a floor of a building, this without great difficulty and / or without the implementation of heavy or expensive means.
  • said stiffening means are connected to said mast so as to transmit stresses tangentially, or almost, to said mast.
  • This characteristic also contributes to distribute or even dissipate the stresses on the mast, the latter can therefore be realized with a reduced section to reduce as much as possible its weight.
  • said stiffening and / or stabilizing means comprise at least two consoles extending from said mast and diverging towards two ground support points each forming a front end of said device.
  • said consoles each comprise said crossbar, an assembly bar to said mast or a support of said mast, and a curved bar connecting the opposite ends of said crossbar and said assembly bar.
  • This provides simple stiffening and / or stabilizing means of design, easy to make and mount, and inexpensive to manufacture.
  • said brackets comprise at least one strut connecting on the one hand said bent bar and, on the other hand, said crossbar and / or said assembly bar.
  • said consoles are coupled to said chassis in a demountable manner.
  • said frame has a sleeve for receiving said mast removably.
  • This also contributes to the ability of the device to switch from a usage configuration to a transport configuration, with means for moving quickly and easily from one configuration to another.
  • said mast is intended to be coupled alternately to a haul end and a towing tip.
  • the device according to the invention can be presented in a road transport configuration, a configuration in which it can easily be towed by a vehicle.
  • the device comprises two ground support feet in the vicinity of said rear end of said device.
  • said chassis has an axle carrying at least one wheel at each of its ends, said device preferably comprising a winch from which extends a hauling cable, said chassis carrying a set of at least two pulleys around which said cable may be wound, said pulleys being mounted on sliding elements along the axis of said mast, one of said sliding elements being integral with said axle, so that pulling the cable by said winch brings the two elements closer together sliding, said device being supported on the ground via said feet.
  • the invention relates to a mobile mobile lifting device, capable of being towed by a vehicle to get to the job site, for vertically lifting structural members of farms, breakdowns, trusses, beams and other loads that can be used in the construction of buildings, the device comprising stiffening and / or stabilization means designed to ensure a high ground stability of the device and to dissipate the stresses that are exerted on it.
  • the invention is particularly intended for the lifting of industrialized frameworks (trusses), but it can also be intended, according to different mounting configurations, for other uses of hoist in other trades (masons, plasterers etc.). ..).
  • a lifting device has a lifting capacity of about 400 kg and thus allows the hoisting of various loads.
  • a hoisting device comprises a mast 1 consisting of a fixed lower part 1B and a part 1A that can be disassembled by sleeving or moved in translation with respect to 1B, for example, a telescopic boom.
  • This mast 1 is inclined at an angle and provided at its top with a return idler pulley 2 for guiding a cable 3 at the end of which a load 4 is likely to be hooked via a means of hanging 5.
  • the mast 1 extends from one end of the device with an angle provided so that the vertical projection of the upper end of the mast (corresponding substantially to the vertical projection of the center of gravity of the load 4) is located in "O" and that this point is always inside the support polygon formed by the support points on the ground (P, Q, R and S) so that the whole system is in static equilibrium in the limits of use and safety required.
  • Control of the center of gravity is provided by a spherical vial level.
  • the angle is about 6 ° relative to the vertical.
  • This angle of 6 ° is calculated for a mast about 6 m high and allows, in addition to contributing to the overall stability of the device, the movement of the device so as to hoist frame members or trusses generally distributed on the frame every 60 cm as illustrated by the figure 12 .
  • the vertical hoisting of the load 4 is performed by an electric winch 9 (220V) or a low-voltage winch (or thermal according to another conceivable embodiment), preferably remotely controlled.
  • counterweights 8 make it possible to increase the self weight of the system, thus increasing the limit values of the hypothetical accidental tilting.
  • the connecting bar 62 takes the form of a bent bar so that it transmits tangentially not only the cross-member 61 (via a connecting flange 621) on which the cross-member 61 and the bar 62 are fixed by welding or bolting) but also to the mast 1.
  • consoles 6 comprise struts 622 mounted between the bar 62 and the cross member 61 or the assembly bar 63.
  • consoles 6 are two in number and diverge from one another towards the points P and Q.
  • consoles 6 in particular by the presence of curved bars 62, makes it possible to form two support ramps of the load to be hoisted.
  • the load 4 (shown in dashed lines) is initially placed on the brackets 6 at the front ends thereof, and the cable 3 is hooked to the load.
  • the cable 3 because of the position of the upper end of the mast, does not occupy a vertical position.
  • the winch is engaged, the load rises by sliding on the bars 62 of the consoles, these bars 62 forming a support ramp for guiding the load until the cable 3 reaches a vertical position. This avoids a sudden change from the starting position of the load to the purely vertical hoisting position.
  • consoles 6 are removably mounted on the device, so as to reduce the size of the device to present it in a transport configuration such as that illustrated by the figures 6 and 7 .
  • the device comprises a frame 10 carrying a axle at the ends of which are mounted wheels 101 so that, in a transport configuration, the device can be towed on the road.
  • the chassis 10 comprises two longitudinal members 1010 on which the axle of the wheels is mounted.
  • the frame carries a sheath 11 in which the mast is fitted and fixed removably.
  • the frame carries on its rear part a plate 1011 carrying various organs (traffic lights, registration ...) ensuring the road standards for the device for towing on the road.
  • the mast 1 is provided to receive by nesting at its end is a hoist end provided with a pulley 2, or a towing end to be coupled to a vehicle coupling.
  • the device also comprises, at its rear end, two feet 7 of ground support, intended to constitute the points of support S and R ( figure 1 ).
  • feet 7 are pivotally mounted on lateral elements 71 secured to the frame.
  • the feet can be brought into a ground support position as illustrated by the figure 8 , or in a folded position for transporting the device as illustrated by the figures 6 and 7 .
  • the sheath 11 is slidably mounted relative to a square tube 12 integral with the frame (and the wheel axle).
  • a pulley 111 is mounted on the sleeve 11 and a pulley 121 is mounted on the tube 12.
  • a cable 30 is wound around the pulleys 11, 12 and is connected to a pull rod 301 intended to be connected to the hook 5 of the cable 3 connected to the winch.
  • pulling upwardly of a rocking lever 301 (or other system) via the hook 5 causes a pull of the cable 30, which generates a bringing the pulleys 11, 12 closer together and thus detaching the wheels 101 from the ground (the rear of the device then resting on the ground only via the stabilizing feet 7).
  • the device which has just been described may be completed by a docking device with a stage or an upper platform 13.
  • the attachment means 5 is fixed to an anchor point 14 located in the alignment of the docking device 12, then through the winch 9 controlled remotely.
  • the apparatus hoist itself by the rope 3 and the pulley 15 rendered driving and steering by the winding of the rope of a turn around itself.
  • This docking device 12 on the floor is placed at the edge of the concrete slab 13 so that the foot 17 in the shape of "L” matches the angle of this slab.
  • the combination of the forces of the rope on said device 12 tends to permanently press the "L” shape of 17 against the edge of the slab.
  • additional retention securing the docking device on the slab is the wire guide 19 which thus receives the rope in the hollow of its "U” shape, as well as the pulley 15 whose external shapes are complementary to those of 19.
  • the attachment system allows to separate the load chain 50 of the mounted element.
  • the load chain 50 relaxes, then by pulling a rope from the ground, the operator controls the stall of this frame member.
  • a safety element such as a rupture member (brittle) or an elastic member (spring blade) calibrated to a value of traction which does not disturb the stability of the system during untimely clashes with this rope.
  • the principle is to equip the hook, without any modification to its manufacturing standards, a quick link 51 of adequate size on the back of the hook, the link receiving the load chain 50, the weight of the latter to find a point of support on the link where the brittle 52 passes to actuate a safety latch 53 of the hook 5.
  • the system can also be used in freight elevator.
  • This option consists of two main elements, comprises two arms 90 at the end of which are fixed two wheels 91.
  • the first position ( Figures 13 and 14 ) is to orient the wheels 91 so that their axes are concurrent in "O" with the axis of the axle of the machine.
  • This first configuration corresponds to the case where an obstacle 92 (wall, posts, ...) is located behind the machine.
  • the position of the wheels is such that they are oriented in the same direction as those of the machine ( Figures 15 and 16 ).
  • a security element ensures the locking of the wheels with shims fixed to a rigid element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

The device has a rolling frame to support an inclined post (1) such that upper end of the post is vertical from the perimeter to the ground delimited by support points at the ground. Rigidification and/or stabilization unit under the form of column (6) has a cross-piece (61) extending between the frame and the support points at a front end of the device. The unit has a connection bar (62) extending between the post and the cross-piece so as to transmit the constraints tangentially/partially to the crosspiece and towards the front end.

Description

Le domaine de l'invention est celui des équipements de levage de charge. Plus précisément, l'invention concerne un dispositif de levage mobile (roulant), de structure relativement légère, destiné en particulier, mais non exclusivement au levage d'un élément de charpente.The field of the invention is that of load lifting equipment. More specifically, the invention relates to a mobile lifting device (rolling), relatively light structure, intended in particular, but not exclusively to the lifting of a frame member.

Actuellement, la majeure partie des petites et moyennes entreprises de charpente traditionnelle bois ou métallique se trouve confrontée à un aspects précis de leur métier qui concerne le levage de charpentes industrialisées (ou fermettes).Currently, the majority of small and medium-sized traditional timber or metal frame companies are confronted with a specific aspect of their trade that involves the lifting of industrialized frames (or farmhouses).

Les difficultés rencontrées sur un chantier quand l'entreprise doit aller monter une charpente sur les murs d'une maison en cours de construction (ou de rénovation) sont liées notamment aux aspects suivants :

  • la fermette est une pièce encombrante (qui implique de ce fait des risques de prise au vent) ;
  • la manipulation des fermettes se doit d'être sécurisée pour les travailleurs ;
  • le levage des fermettes doit être précis (les fermettes se posent tous les 60 cm) ;
  • l'employeur doit éviter tout risque de chute des travailleurs se déplaçant en hauteur tandis qu'il portent des éléments de charpente.
The difficulties encountered on a construction site when the company has to build a frame on the walls of a house under construction (or renovation) are related in particular to the following aspects:
  • the farmhouse is a cumbersome room (which therefore involves the risk of catching wind);
  • farmhouse handling must be secure for workers;
  • the lifting of the farmhouses must be precise (the farmhouses are raised every 60 cm);
  • the employer must avoid any risk of falling workers moving upwards while carrying structural elements.

En général, dans la plupart des entreprises de mise en oeuvre de charpente traditionnelle et industrialisée, le levage et la pose des élément de charpente se fait traditionnellement comme suit : sur le chantier extérieur, deux ou trois ouvriers soulèvent manuellement les éléments de charpente sur leurs épaules et montent chacun sur une échelle pour aller poser ces éléments sur les murs de la maison en cours de construction (une fois la maçonnerie de cette maison achevée).Typically, in most traditional and industrialized framing companies, the lifting and laying of structural members is traditionally done as follows: on the worksite, two or three workers manually lift the framing members onto their shoulders and climb each on a ladder to put these elements on the walls of the house under construction (once the masonry of this house completed).

Or, conformément à des dispositions juridiques récentes, il est strictement interdit, par le Code du Travail, à un salarié d'élever une charge pendant qu'il monte sur une échelle.However, according to recent legal provisions, it is strictly forbidden by the Labor Code for an employee to raise a load while climbing a ladder.

En d'autres termes, le travailleur doit monter les mains vides. Ceci est clairement imposé par l'article R.233-13-22 du Code du Travail qui stipule que « les échelles ne doivent pas être utilisées comme poste de travail ».In other words, the worker must go up empty handed. This is clearly required by article R.233-13-22 of the Labor Code, which states that "ladders must not be used as workstations".

Le Code du Travail souligne également dans l'article R.233-13-22 que « la priorité doit être donnée aux équipements permettant d'assurer la protection collective des travailleurs ».The Labor Code also stresses in article R.233-13-22 that "priority must be given to equipment to ensure the collective protection of workers".

Parallèlement, les textes insistent sur le fait que chaque entreprise doit mettre en place tous les éléments de sécurité indispensables pour assurer la protection de ses travailleurs.At the same time, the texts insist that each company must put in place all the necessary security elements to ensure the protection of its workers.

Il est donc impératif pour les entreprises de charpente de trouver une solution pour effectuer le levage des fermettes et des éléments de charpente traditionnelle en évitant tout risque de chute du travailleur, et par là même en assurant la sécurité.It is therefore imperative for the framing companies to find a solution to carry out the lifting of the trusses and traditional structural elements, avoiding any risk of falling of the worker, and thus ensuring safety.

Certains appareils de levage existants présentent la capacité d'assurer le levage des fermettes et des éléments de charpente traditionnelle. Toutefois, tous ces appareils sont soit surdimensionnés, soit sous-dimensionnés par rapport à l'envergure d'une entreprise artisanale de charpente.Some existing elevators have the ability to lift small farms and traditional timbers. However, all these devices are either oversized or undersized in relation to the scale of a traditional framing company.

On connaît notamment trois types d'appareils de levage destinés au secteur du bâtiment (grue, chariot élévateur à fourche et nacelle), mais aucun des trois n'est adapté au levage des fermettes pour les raisons suivantes.Three types of lifting devices are known for the building sector (crane, forklift and bucket), but none of the three are suitable for lifting small farms for the following reasons.

Les grues à tour ou sur camion et chariot élévateur télescopique de chantier impliquent notamment les inconvénients suivants :

  • ils exigent un permis poids lourds, de grutier ou cariste ;
  • ils représentent un coût considérable pour une petite entreprise de charpente traditionnelle ;
  • ils s'avèrent être des appareils de levage disproportionnés (surdimensionnés) par rapport à l'utilisation demandée (levage de fermettes de 70 kg) ;
  • ils nécessitent des temps de mise en place de l'appareil de levage aussi longs que le temps passé pour la pose de la charpente sur le chantier.
Tower cranes or truck cranes and telescopic forklift trucks involve the following disadvantages:
  • they require a HGV, crane operator or driver license;
  • they represent a considerable cost for a small traditional carpentry firm;
  • they prove to be disproportionate (oversized) lifting devices in relation to the required use (lifting of 70 kg trusses);
  • they require installation times of the hoist as long as the time spent installing the structure on site.

Les chariots élévateurs à fourche ou potence d'atelier sont quant à eux inadaptés aux chantiers de montage de charpente du fait de :

  • leur conception pour un travail d'atelier;
  • leur inopérabilité sur tout type terrain ;
  • leur non adaptation aux effet du vent sur les chantiers d'extérieur.
Forklifts or workshop jacks are unsuitable for framing work because of:
  • their design for workshop work;
  • their inoperability on any type of terrain;
  • their non-adaptation to the effect of the wind on outdoor sites.

Les nacelles, pour leur part, sont conçues pour monter exclusivement des personnes et ne doivent donc lever aucune charge.Nacelles, for their part, are designed to mount exclusively people and therefore must lift no load.

Il a également été proposé par l'art antérieur une grue pour la mise en place de charpentes légères, décrite dans le document de brevet publié sous le numéro FR-2 358 353 .It has also been proposed by the prior art a crane for the installation of light frameworks, described in the patent document published under the number FR-2 358 353 .

Selon la technique décrite, la grue comprend un châssis équipé de moyens de roulement, un chevalet emboîté sur le châssis et un treuil manoeuvrable à la main porté par le chevalet. La grue comporte également un mât de levage articulé au sommet du chevalet et muni, à ses deux extrémités, de moyens de guidage et de renvoi pour un câble de levage actionné à partir du treuil.According to the technique described, the crane comprises a chassis equipped with rolling means, a bridge fitted on the chassis and a manually operable winch carried by the bridge. The crane also has a lifting mast hinged at the top of the bridge and provided at both ends with guide and return means for a lifting cable actuated from the winch.

Le châssis, le chevalet et le mât de cette grue sont constitués par des tubes à section droite polygonale qui permettent un assemblage démontable par emboîtage et goupillage, en l'absence de tout élément de serrage.The frame, the easel and the mast of this crane are constituted by polygonal cross-section tubes which allow a removable assembly by fitting and pinning, in the absence of any clamping element.

Un contre-poids constitué par une charge est fixé au châssis à l'opposé du chevalet ou potence verticale.A counterweight consisting of a load is attached to the frame opposite the vertical bridge or bracket.

Selon la solution décrite, le mât de levage est articulé au sommet du chevalet, dans sa partie médiane, tandis qu'il peut coopérer avec des moyens d'ancrage de l'extrémité libre du câble ou des moyens de blocage solidaires du châssis pour permettre, par l'intermédiaire du câble, de réaliser respectivement l'une ou l'autre des opérations suivantes :

  • modification de l'orientation du mât ;
  • levage d'une charge.
According to the solution described, the lifting mast is articulated at the top of the bridge, in its middle part, while it can cooperate with means for anchoring the free end of the cable or locking means integral with the frame to allow, by means of the cable, respectively to perform one or other of the following operations:
  • modification of the orientation of the mast;
  • lifting a load.

Cette solution présente de nombreux inconvénients.This solution has many disadvantages.

Un inconvénient majeur de cette grue réside dans sa confirguration générale. En effet, l'extrémité supérieure du mât, en position vers le haut, est verticalement en dehors du périmètre défini par le châssis. Aussi, lorsque la grue est en charge, son centre de gravité tend à être déporté vers l'extérieur du périmètre défini par le châssis, ceci malgré la présence du contre-poids.A major disadvantage of this crane lies in its general confirguration. Indeed, the upper end of the mast, in the upward position, is vertically outside the perimeter defined by the frame. Also, when the crane is in charge, its center of gravity tends to be deported outward of the perimeter defined by the frame, this despite the presence of counterweight.

Or, sous l'effet du vent, la charge peut être amenée à être animée d'un mouvement de balancier, conduisant à une situation très périlleuse d'instabilité de la grue.However, under the effect of wind, the load can be brought to be driven by a pendulum movement, leading to a very perilous situation of instability of the crane.

Ceci est bien entendu inacceptable.This is of course unacceptable.

De plus, une telle grue a un poids, une fois assemblée, d'environ 250 kg. Un tel poids rend la grue, équipée de roulettes, difficile à déplacer par des personnes, en particulier sur un chantier dont le sol est classiquement irrégulier.In addition, such a crane has a weight, once assembled, of about 250 kg. Such a weight makes the crane, equipped with wheels, difficult to move by people, especially on a site whose floor is classically irregular.

Ce poids est aussi préjudiciable lorsqu'il est nécessaire de disposer d'une assistance au levage au niveau d'un étage, une telle grue ne pouvant que très difficilement être hissée elle-même en hauteur.This weight is also detrimental when it is necessary to have a lifting assistance at the level of a floor, such a crane can only very difficult to be hoisted itself in height.

Un autre inconvénient de cette solution est liée à son assemblage qui implique de nombreuses opérations et donc un temps de réalisation relativement important. Il en va de même lors du démontage d'une telle grue.Another disadvantage of this solution is related to its assembly which involves many operations and therefore a relatively large completion time. The same goes for the dismantling of such a crane.

En outre, l'inclinaison variable du mât implique des risques importants en cas d'accrochage inefficace ou défaillant, susceptible de conduire à la mise en danger des personnes au voisinage de la grue.In addition, the variable inclination of the mast involves significant risks in case of ineffective or faulty attachment, likely to lead to endangering people in the vicinity of the crane.

L'invention a notamment pour objectif de pallier les inconvénients de l'art antérieur.The invention particularly aims to overcome the disadvantages of the prior art.

Plus précisément, l'invention a pour objectif de proposer un dispositif de levage de charges mobile, de structure légère, qui présente une grande stabilité, y compris en charge et sous l'effet du vent.More specifically, the invention aims to provide a mobile load lifting device, light structure, which has a high stability, including load and under the effect of wind.

L'invention a également pour objectif de fournir un tel dispositif qui puisse être amené et mis en service sur un chantier de façon simple.The invention also aims to provide such a device that can be brought and commissioned on a job site in a simple manner.

L'invention a aussi pour objectif de fournir un tel dispositif qui puisse être déplacé aisément sur un chantier en vue de déplacements répétés.The invention also aims to provide such a device that can be moved easily on a site for repeated movements.

L'invention a encore pour objectif de fournir un tel dispositif qui puisse être hissé au niveau d'un étage d'une construction.The invention also aims to provide such a device that can be hoisted at a floor of a building.

Encore un autre objectif de l'invention est de fournir un tel dispositif qui soit conforme en termes de sécurité aux textes en vigueur sur les plans juridique, normatif et réglementaire.Yet another object of the invention is to provide such a device that is compliant in terms of security to the texts in force at the legal, normative and regulatory levels.

Encore un autre objectif de l'invention est de fournir un tel dispositif qui soit simple de conception, facile à mettre en oeuvre et peu coûteux à réaliser.Yet another object of the invention is to provide such a device which is simple in design, easy to implement and inexpensive to produce.

Ces objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints grâce à l'invention qui a pour objet un dispositif de levage d'une charge tel que défini dans la revendication 1.These objectives, as well as others which will appear later, are achieved thanks to the invention which relates to a device for lifting a load as defined in claim 1.

Un dispositif de levage ainsi constitué présente une grande stabilité au sol, y compris en cas de vent susceptible d'entraîner un mouvement de balancier de la charge levée.A lifting device thus formed has great stability on the ground, including in the event of wind likely to cause a rocking movement of the lifted load.

Un dispositif selon l'invention permet donc de lever des charges, telles que des éléments de charpentes, en toute sécurité pour les ouvriers évoluant au voisinage du dispositif, ceci dans le respects des textes juridiques, normatifs et réglementaires.A device according to the invention thus makes it possible to lift loads, such as as structural elements, in complete safety for the workers moving in the vicinity of the device, this in the respect of the legal, normative and regulatory texts.

Par ailleurs, la structure des moyens de rigidification et/ou de stabilisation contribue à la bonne « assise » au sol du dispositif, ceci de plus en assurant une distribution et une dissipation des contraintes qui permettent de réaliser le dispositif avec des éléments structurels relativement légers (calculés bien entendu pour assurer une résistance satisfaisante de l'ensemble).Furthermore, the structure of the stiffening and / or stabilization means contributes to the good "sitting" on the ground of the device, this moreover ensuring a distribution and a dissipation of the stresses which make it possible to produce the device with relatively light structural elements (Calculated of course to ensure a satisfactory resistance of the whole).

Aussi, ce dispositif appelé console pouvant être réalisé à partir d'éléments structurels légers, on obtient un ensemble de poids relativement réduit de l'ordre d'environ 30 kg.Also, this device called console can be made from light structural elements, we obtain a set of relatively reduced weight of the order of about 30 kg.

Un tel dispositif de levage peut donc être déplacé manuellement sur le chantier, de poste en poste, rapidement et aisément grâce aux roues montées sur essieu et grâce à la position de quasi équilibre du système dont le centre de gravité est situé à la verticale de l'axe des roues.Such a lifting device can therefore be moved manually on site, from station to station, quickly and easily thanks to the wheels mounted on the axle and thanks to the near-equilibrium position of the system whose center of gravity is located in the vertical position. wheel axis.

En outre, comme cela va être explicité plus en détails par la suite, il est envisageable avec un dispositif de levage selon l'invention de hisser celui-ci au niveau d'un étage d'une construction, ceci sans grandes difficultés et/ou sans la mise en oeuvre de moyens lourds ou coûteux.In addition, as will be explained in more detail later, it is possible with a lifting device according to the invention to hoist it at a floor of a building, this without great difficulty and / or without the implementation of heavy or expensive means.

Selon une solution préférée, lesdits moyens de rigidification sont reliés audit mât de façon à transmettre des contraintes tangentiellement, ou quasiment, audit mât.According to a preferred solution, said stiffening means are connected to said mast so as to transmit stresses tangentially, or almost, to said mast.

Cette caractéristique contribue également à distribuer voire dissiper les contraintes sur le mât, ce dernier pouvant de ce fait être réalisé avec une section réduite en vue de réduire tant que faire se peut son poids.This characteristic also contributes to distribute or even dissipate the stresses on the mast, the latter can therefore be realized with a reduced section to reduce as much as possible its weight.

Selon l'invention, lesdits moyens de rigidification et/ou de stabilisation comprennent au moins deux consoles s'étendant à partir dudit mât et divergentes vers deux points d'appui au sol formant chacun une extrémité avant dudit dispositif.According to the invention, said stiffening and / or stabilizing means comprise at least two consoles extending from said mast and diverging towards two ground support points each forming a front end of said device.

Dans ce cas, lesdites consoles comprennent chacune ladite traverse, une barre d'assemblage audit mât ou à un support dudit mât, et une barre cintrée reliant les extrémités opposées de ladite traverse et de ladite barre d'assemblage.In this case, said consoles each comprise said crossbar, an assembly bar to said mast or a support of said mast, and a curved bar connecting the opposite ends of said crossbar and said assembly bar.

On obtient ainsi des moyens de rigidification et/ou de stabilisation simples de conception, facile à réaliser et à monter, et peu coûteux à fabriquer.This provides simple stiffening and / or stabilizing means of design, easy to make and mount, and inexpensive to manufacture.

Avantageusement, lesdites consoles comprennent au moins une jambe de force reliant d'une part ladite barre cintrée et, d'autre part, ladite traverse et/ou ladite barre d'assemblage.Advantageously, said brackets comprise at least one strut connecting on the one hand said bent bar and, on the other hand, said crossbar and / or said assembly bar.

On améliore encore de cette façon la rigidité des consoles, ceci sans devoir les alourdir considérablement.In this way, the rigidity of the consoles is further improved without having to make them considerably heavier.

Selon une solution avantageuse, lesdites consoles sont couplées audit châssis de façon démontable.According to an advantageous solution, said consoles are coupled to said chassis in a demountable manner.

On peut ainsi, comme cela va apparaître plus clairement par la suite, présenter le dispositif avec un encombrement réduit, ceci en démontant les consoles, ce qui permet de passer le dispositif dans une configuration de transport en vue de l'amener par voie routière sur le chantier (ou de le retirer du chantier).It is thus possible, as will appear more clearly later, to present the device with a small footprint, this by dismounting the consoles, which allows to pass the device in a transport configuration to bring it by road on the site (or remove it from the site).

Avantageusement, ledit châssis présente un fourreau destiné à recevoir ledit mât de façon amovible.Advantageously, said frame has a sleeve for receiving said mast removably.

Ceci contribue également à la capacité du dispositif à passer d'une configuration d'utilisation à une configuration de transport, ceci avec des moyens pour passer rapidement et aisément d'une configuration à l'autre.This also contributes to the ability of the device to switch from a usage configuration to a transport configuration, with means for moving quickly and easily from one configuration to another.

Selon une solution avantageuse, ledit mât est destiné à être couplé alternativement à un embout de hissage et à un embout de tractage.According to an advantageous solution, said mast is intended to be coupled alternately to a haul end and a towing tip.

On comprend ainsi que le dispositif selon l'invention peut être présenté dans une configuration de transport sur voie routière, configuration dans laquelle il peut aisément être tracté par un véhicule.It is thus understood that the device according to the invention can be presented in a road transport configuration, a configuration in which it can easily be towed by a vehicle.

Selon une autre caractéristique, le dispositif comprend deux pieds d'appui au sol au voisinage de ladite extrémité arrière dudit dispositif.According to another characteristic, the device comprises two ground support feet in the vicinity of said rear end of said device.

On peut ainsi renforcer la stabilité et le maintient dans une position fixée au sol du dispositif de levage, ceci en augmentant le nombre d'appui au sol.It is thus possible to reinforce the stability and maintain it in a fixed position on the ground of the lifting device, this by increasing the number of ground support.

Dans ce cas, ledit châssis présente un essieu portant au moins une roue à chacune de ses extrémités, ledit dispositif comprenant préférentiellement un treuil à partir duquel s'étend un câble de hissage, ledit châssis portant un jeu d'au moins deux poulies autour desquelles ledit câble peut être enroulé, lesdites poulies étant montées sur des éléments coulissants selon l'axe dudit mât, l'un desdits éléments coulissants étant solidaire dudit essieu, de telle sorte qu'une traction du câble par ledit treuil entraîne le rapprochement des deux éléments coulissants, ledit dispositif étant en appui au sol par l'intermédiaire desdits pieds.In this case, said chassis has an axle carrying at least one wheel at each of its ends, said device preferably comprising a winch from which extends a hauling cable, said chassis carrying a set of at least two pulleys around which said cable may be wound, said pulleys being mounted on sliding elements along the axis of said mast, one of said sliding elements being integral with said axle, so that pulling the cable by said winch brings the two elements closer together sliding, said device being supported on the ground via said feet.

Ainsi, on supprime temporairement les moyens de mobilité au sol du dispositif et donc le risque de voir celui-ci se déplacer de façon inopportune.Thus, it removes temporarily the ground mobility means of the device and therefore the risk of it moving inappropriately.

De plus, on peut ainsi relever rapidement les roues du dispositif par rapport au sol, ceci sans effort.In addition, it can quickly lift the wheels of the device relative to the ground, this without effort.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation préférentiel de l'invention, donné à titre d'exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • les figures 1 à 3 sont des représentations schématiques d'un dispositif de levage selon l'invention respectivement vu de côté, de face et de dessus ;
  • la figure 4 est une vue en perspective de l'avant d'un dispositif de levage selon l'invention, en configuration et position de hissage ;
  • la figure 5 est une vue partielle en perspective de l'arrière d'un dispositif de levage selon l'invention, en configuration et position de hissage ;
  • les figures 6 et 7 sont des vues en perspective, respectivement de l'avant et de l'arrière d'un dispositif de levage selon l'invention, en configuration et position de transport ;
  • la figure 8 est une vue partielle d'un dispositif de levage selon l'invention permettant d'illustrer le système de levée des roues d'un dispositif de levage de l'invention ;
  • les figures 9 et 10 sont des représentations schématiques, respectivement de côté et de face d'un système de hissage au niveau d'un étage d'un dispositif de levage selon l'invention ;
  • la figure 11 est une vue d'un système de décrochage à distance d'une charge, destiné à équiper un dispositif de levage selon l'invention ;
  • la figure 12 est une vue d'un dispositif selon l'invention dans son contexte d'intervention ;
  • les figures 13 à 16 sont des vues d'une application particulière d'un dispositif selon l'invention.
Other characteristics and advantages of the invention will emerge more clearly on reading the following description of a preferred embodiment of the invention, given by way of illustrative and nonlimiting example, and the appended drawings among which:
  • the Figures 1 to 3 are schematic representations of a lifting device according to the invention respectively seen from the side, from the front and from above;
  • the figure 4 is a perspective view of the front of a lifting device according to the invention, in configuration and hoisting position;
  • the figure 5 is a partial perspective view of the rear of a lifting device according to the invention, in configuration and hoisting position;
  • the figures 6 and 7 are perspective views, respectively of the front and rear of a lifting device according to the invention, in configuration and transport position;
  • the figure 8 is a partial view of a lifting device according to the invention for illustrating the lifting system of the wheels of a lifting device of the invention;
  • the Figures 9 and 10 are schematic representations, respectively of side and front of a hoisting system at a floor of a lifting device according to the invention;
  • the figure 11 is a view of a remote stall system of a load, intended to equip a lifting device according to the invention;
  • the figure 12 is a view of a device according to the invention in its context of intervention;
  • the Figures 13 to 16 are views of a particular application of a device according to the invention.

Tel qu'indiqué précédemment, l'invention concerne un dispositif de levage mobile roulant, susceptible d'être tracté par un véhicule pour se rendre sur le chantier, destiné à lever verticalement des pièces de charpente de type fermes, pannes, fermettes, poutres et autres charges pouvant être utilisées dans la construction de bâtiments, le dispositif comprenant des moyens de rigidification et/ou de stabilisation conçus pour assurer une grande stabilité au sol du dispositif et dissiper les contraintes qui s'exercent sur lui.As indicated above, the invention relates to a mobile mobile lifting device, capable of being towed by a vehicle to get to the job site, for vertically lifting structural members of farms, breakdowns, trusses, beams and other loads that can be used in the construction of buildings, the device comprising stiffening and / or stabilization means designed to ensure a high ground stability of the device and to dissipate the stresses that are exerted on it.

L'invention est particulièrement destinée au levage de charpentes industrialisées (fermettes), mais elle peut également être destinée, suivant des configurations de montage différentes, à d'autres usages de monte charge dans d'autres corps de métier (maçons, plâtriers etc...).The invention is particularly intended for the lifting of industrialized frameworks (trusses), but it can also be intended, according to different mounting configurations, for other uses of hoist in other trades (masons, plasterers etc.). ..).

Un dispositif de levage selon l'invention présente une capacité de levage d'environ 400 kg et permet de ce fait le hissage de charges variées.A lifting device according to the invention has a lifting capacity of about 400 kg and thus allows the hoisting of various loads.

En référence aux figures 1 à 3, un dispositif de levage selon le présent mode de réalisation comprend un mât 1 constitué d'une partie inférieure 1B fixe et d'une partie 1A démontable par manchonnage ou animée d'un mouvement de translation par rapport à 1B, comme par exemple, une flèche télescopique.With reference to Figures 1 to 3 a hoisting device according to the present embodiment comprises a mast 1 consisting of a fixed lower part 1B and a part 1A that can be disassembled by sleeving or moved in translation with respect to 1B, for example, a telescopic boom.

Ce mât 1 est incliné d'un angle a et muni en son sommet d'une poulie folle de retour 2 permettant de guider un câble 3 au bout duquel une charge 4 est susceptible d'être accroché par l'intermédiaire d'un moyen d'accrochage 5.This mast 1 is inclined at an angle and provided at its top with a return idler pulley 2 for guiding a cable 3 at the end of which a load 4 is likely to be hooked via a means of hanging 5.

Le mât 1 s'étend à partir d'une extrémité du dispositif avec un angle prévu de telle sorte que la projection verticale de l'extrémité supérieure du mât (correspondant sensiblement à la projection verticale du centre de gravité de la charge 4) est située en « O » et que ce point se trouve toujours à l'intérieur du polygone de sustentation formé par les points d'appui au sol (P, Q, R et S) pour que l'ensemble du système se trouve en équilibre statique dans les limites d'utilisation et de sécurité requises. Le contrôle du centre de gravité est assuré par un niveau à fiole sphérique.The mast 1 extends from one end of the device with an angle provided so that the vertical projection of the upper end of the mast (corresponding substantially to the vertical projection of the center of gravity of the load 4) is located in "O" and that this point is always inside the support polygon formed by the support points on the ground (P, Q, R and S) so that the whole system is in static equilibrium in the limits of use and safety required. Control of the center of gravity is provided by a spherical vial level.

Préférentiellement, l'angle est d'environ 6° par rapport à la verticale. Cet angle de 6° est calculé pour un mât d'environ 6 m de hauteur et permet, outre de contribuer à la stabilité globale du dispositif, le déplacement du dispositif de façon à hisser des éléments de charpente ou des fermettes généralement réparties sur la charpente tous les 60 cm tel qu'illustré par la figure 12.Preferably, the angle is about 6 ° relative to the vertical. This angle of 6 ° is calculated for a mast about 6 m high and allows, in addition to contributing to the overall stability of the device, the movement of the device so as to hoist frame members or trusses generally distributed on the frame every 60 cm as illustrated by the figure 12 .

Tel que cela apparaît sur la figure 5, le hissage vertical de la charge 4 est effectué par un treuil 9 électrique (220V) ou un treuil à basse tension (ou thermique selon un autre mode de réalisation envisageable) de préférence piloté à distance.As it appears on the figure 5 the vertical hoisting of the load 4 is performed by an electric winch 9 (220V) or a low-voltage winch (or thermal according to another conceivable embodiment), preferably remotely controlled.

Pour des raisons de sécurité, des contre-poids 8 permettent d'augmenter le poids propre du système, ce qui accroît ainsi les valeurs limites de l'hypothétique basculement accidentel.For safety reasons, counterweights 8 make it possible to increase the self weight of the system, thus increasing the limit values of the hypothetical accidental tilting.

Selon le principe de l'invention, le dispositif de levage comprend des moyens de rigidification et/ou de stabilisation comprenant :

  • au moins une traverse 61 s'étendant entre le châssis du dispositif de la base du mât 1 et un point d'appui au sol à l'extrémité avant du dispositif (les points P ou Q sur les figures 3 et 4) ;
  • une barre de liaison 62 s'étendant entre le mât 1 et la traverse 61 de façon à transmettre des contraintes tangentiellement à la traverse et dirigées vers les points Q (ou P).
According to the principle of the invention, the lifting device comprises stiffening and / or stabilizing means comprising:
  • at least one cross member 61 extending between the frame of the device of the base of the mast 1 and a ground support point at the front end of the device (the points P or Q on the figures 3 and 4 );
  • a connecting bar 62 extending between the mast 1 and the cross member 61 so as to transmit stresses tangentially to the cross and directed towards the points Q (or P).

Ces moyens de rigidification et/ou de stabilisation sont réalisés sous forme de consoles 6 comprenant chacune :

  • une traverse 61 ;
  • une barre d'assemblage 63;
  • une barre de liaison 62.
These stiffening and / or stabilizing means are made in the form of consoles 6 each comprising:
  • a cross member 61;
  • an assembly bar 63;
  • a link bar 62.

Tel qu'illustré par la figue 4 qui montre un dispositif de levage selon l'invention dans une configuration de hissage, la barre de liaison 62 prend la forme d'une barre cintrée de telle sorte qu'elle transmette des contraintes tangentiellement non seulement à la traverse 61 (par l'intermédiaire d'une joue de raccordement 621) sur laquelle la traverse 61 et la barre 62 sont fixées par soudage ou par boulonnage) mais également au mât 1.As illustrated by Fig. 4 which shows a lifting device according to the invention in a hoisting configuration, the connecting bar 62 takes the form of a bent bar so that it transmits tangentially not only the cross-member 61 (via a connecting flange 621) on which the cross-member 61 and the bar 62 are fixed by welding or bolting) but also to the mast 1.

En outre, les consoles 6 comprennent des jambes de force 622 montées entre la barre 62 et la traverse 61 ou la barre d'assemblage 63.In addition, the consoles 6 comprise struts 622 mounted between the bar 62 and the cross member 61 or the assembly bar 63.

Comme cela apparaît sur les figures 3 et 4, les consoles 6 sont au nombre de deux et divergent l'une de l'autre en direction des points P et Q.As it appears on the figures 3 and 4 the consoles 6 are two in number and diverge from one another towards the points P and Q.

Par ailleurs, la structure des consoles 6, en particulier de par la présence des barres cintrées 62, permet de constituer deux rampes support de la charge à hisser.Moreover, the structure of the consoles 6, in particular by the presence of curved bars 62, makes it possible to form two support ramps of the load to be hoisted.

En effet, tel qu'illustré par la figure 1, la charge 4 (représentée en traits pointillés) est dans un premier temps posé sur les consoles 6, aux extrémités avant de celles-ci, et le câble 3 est accroché à la charge. Dans cette position de départ, le câble 3, du fait de la position de l'extrémité supérieure du mât, n'occupe pas une position verticale. Lorsque le treuil est enclenché, la charge s'élève en glissant sur les barres 62 des consoles, ces barres 62 formant une rampe d'appui de guidage de la charge jusqu'à ce que le câble 3 rejoigne une position verticale. On évite ainsi un passage brutal de la position de départ de la charge à la position de hissage purement vertical.Indeed, as illustrated by the figure 1 , the load 4 (shown in dashed lines) is initially placed on the brackets 6 at the front ends thereof, and the cable 3 is hooked to the load. In this starting position, the cable 3, because of the position of the upper end of the mast, does not occupy a vertical position. When the winch is engaged, the load rises by sliding on the bars 62 of the consoles, these bars 62 forming a support ramp for guiding the load until the cable 3 reaches a vertical position. This avoids a sudden change from the starting position of the load to the purely vertical hoisting position.

On note que les consoles 6 sont montées de façon démontable sur le dispositif, de façon à pouvoir réduire l'encombrement du dispositif en vue de le présenter dans une configuration de transport telle que celle illustrée par les figures 6 et 7.Note that the consoles 6 are removably mounted on the device, so as to reduce the size of the device to present it in a transport configuration such as that illustrated by the figures 6 and 7 .

En référence à la figure 6, le dispositif comprend un châssis 10 portant un essieu aux extrémités duquel sont montées des roues 101 de telle sorte que, dans une configuration de transport, le dispositif puisse être tracté sur voie routière.With reference to the figure 6 , the device comprises a frame 10 carrying a axle at the ends of which are mounted wheels 101 so that, in a transport configuration, the device can be towed on the road.

Le châssis 10 comprend deux longerons 1010 sur lesquels est monté l'essieu des roues.The chassis 10 comprises two longitudinal members 1010 on which the axle of the wheels is mounted.

En outre, le châssis porte un fourreau 11 dans lequel le mât est emboîté et fixé de façon amovible.In addition, the frame carries a sheath 11 in which the mast is fitted and fixed removably.

De plus, tel que cela apparaît sur la figure 7, le châssis porte sur sa partie arrière une plaque 1011 portant différents organes (feux de signalisation, immatriculation...) assurant la mise aux normes routières du dispositif en vue de son remorquage sur route.Moreover, as it appears on the figure 7 , the frame carries on its rear part a plate 1011 carrying various organs (traffic lights, registration ...) ensuring the road standards for the device for towing on the road.

Par ailleurs, le mât 1 est prévu pour recevoir par emboîtement à son extrémité soit un embout de hissage pourvu d'une poulie 2, soit un embout de tractage destiné à être couplé à un attelage de véhicule.Furthermore, the mast 1 is provided to receive by nesting at its end is a hoist end provided with a pulley 2, or a towing end to be coupled to a vehicle coupling.

Selon une autre caractéristique, le dispositif comprend également, à son extrémité arrière, deux pieds 7 d'appui au sol, destinés à constituer les points d'appui S et R (figure 1).According to another characteristic, the device also comprises, at its rear end, two feet 7 of ground support, intended to constitute the points of support S and R ( figure 1 ).

Ces pieds 7 sont montés pivotants sur des éléments latéraux 71 solidaires du châssis.These feet 7 are pivotally mounted on lateral elements 71 secured to the frame.

Aussi, les pieds peuvent être amenés dans une position d'appui au sol tel qu'illustré par la figure 8, ou dans une position repliée en vue du transport du dispositif tel qu'illustré par les figures 6 et 7.Also, the feet can be brought into a ground support position as illustrated by the figure 8 , or in a folded position for transporting the device as illustrated by the figures 6 and 7 .

Selon encore une autre caractéristique de l'invention, le fourreau 11 est monté coulissant par rapport à un tube carré 12 solidaire du châssis (et de l'essieu de roues).According to yet another characteristic of the invention, the sheath 11 is slidably mounted relative to a square tube 12 integral with the frame (and the wheel axle).

Une poulie 111 est montée sur le fourreau 11 et une poulie 121 est monté sur le tube 12.A pulley 111 is mounted on the sleeve 11 and a pulley 121 is mounted on the tube 12.

Un câble 30 est enroulé autour des poulies 11, 12 et est relié à une bielle de traction 301 destinée à être reliée au crochet 5 du câble 3 relié au treuil. Ainsi, une traction vers le haut d'un levier à bascule 301 (ou autre système), par l'intermédiaire du crochet 5 entraîne une traction du câble 30, ce qui engendre un rapprochement des poulies 11, 12 et donc un décollement des roues 101 par rapport au sol (l'arrière du dispositif étant alors en appui au sol seulement par l'intermédiaire des pieds stabilisateurs 7).A cable 30 is wound around the pulleys 11, 12 and is connected to a pull rod 301 intended to be connected to the hook 5 of the cable 3 connected to the winch. Thus, pulling upwardly of a rocking lever 301 (or other system), via the hook 5 causes a pull of the cable 30, which generates a bringing the pulleys 11, 12 closer together and thus detaching the wheels 101 from the ground (the rear of the device then resting on the ground only via the stabilizing feet 7).

On note qu'entre chaque levage d'une charge, on déleste les pieds stabilisateurs et le contrepoids, ce qui permet la remise sur essieu pour que les roues redeviennent porteuses et ainsi que l'appareil puise être déplacé à son nouveau poste de levage rapidement et fréquemment sans démontage.It is noted that between each lifting of a load, the stabilizing feet and the counterweight are unloaded, which allows the re-setting axle so that the wheels become carriers and so that the device can be moved to its new lifting station quickly and frequently without disassembly.

Par ailleurs, en référence aux figures 9 et 10, le dispositif qui vient d'être décrit peut être complété par un dispositif d'accostage à un étage ou à une plate-forme supérieure 13.Moreover, with reference to Figures 9 and 10 , the device which has just been described may be completed by a docking device with a stage or an upper platform 13.

Dans ce cas, le moyen d'accrochage 5 est fixé à un point d'ancrage 14 situé dans l'alignement du dispositif d'accostage 12, puis grâce au treuil 9 commandé à distance,. L'appareil se hisse lui-même par le filin 3 et la poulie 15 rendue motrice et directrice par l'enroulement du filin d'un tour autour d'elle-même.In this case, the attachment means 5 is fixed to an anchor point 14 located in the alignment of the docking device 12, then through the winch 9 controlled remotely. The apparatus hoist itself by the rope 3 and the pulley 15 rendered driving and steering by the winding of the rope of a turn around itself.

Ce dispositif d'accostage 12 à l'étage est posé au bord de la dalle de béton 13 de manière à ce que le pied 17 en forme de « L » épouse l'angle de cette dalle. La combinaison des efforts du filin sur ledit dispositif 12 tend à plaquer en permanence la forme en « L » de 17 contre le bord de la dalle. Pour éliminer les risques de chute, il pourra être envisagé un maintien supplémentaire de fixation du dispositif d'accostage sur la dalle. La partie active de cet ensemble est le guide filin 19 qui reçoit donc le filin dans le creux de sa forme en « U », ainsi que la poulie 15 dont les formes extérieures sont complémentaires à celles de 19.This docking device 12 on the floor is placed at the edge of the concrete slab 13 so that the foot 17 in the shape of "L" matches the angle of this slab. The combination of the forces of the rope on said device 12 tends to permanently press the "L" shape of 17 against the edge of the slab. To eliminate the risk of falling, it may be envisaged additional retention securing the docking device on the slab. The active part of this assembly is the wire guide 19 which thus receives the rope in the hollow of its "U" shape, as well as the pulley 15 whose external shapes are complementary to those of 19.

Selon une autre caractéristique avantageuse illustrée par la figure 11, le système d'accrochage permet de désolidariser la chaîne de charge 50 de l'élément monté. Dès que la charge 4 repose sur son support, la chaîne de charge 50 se détend, puis par traction d'un cordage depuis le sol, l'opérateur commande le décrochage de cet élément de charpente. A l'extrémité haute du cordage, un élément de sécurité, tel un organe de rupture (cassant) ou un organe élastique (lame ressort) taré à une valeur de traction qui ne perturbe pas la stabilité du système lors d'accrochages inopinés avec ce cordage.According to another advantageous characteristic illustrated by the figure 11 , the attachment system allows to separate the load chain 50 of the mounted element. As soon as the load 4 rests on its support, the load chain 50 relaxes, then by pulling a rope from the ground, the operator controls the stall of this frame member. At the upper end of the rope, a safety element, such as a rupture member (brittle) or an elastic member (spring blade) calibrated to a value of traction which does not disturb the stability of the system during untimely clashes with this rope.

Le principe consiste à équiper le crochet, sans aucune modification à ses normes de fabrication, d'un maillon rapide 51 de dimension adéquate sur le dos du crochet, ce maillon recevant la chaîne de charge 50, le poids de cette dernière permettant de trouver un point d'appui sur le maillon où passe le cassant 52 pour actionner un linguet de sécurité 53 du crochet 5. La traction vers le bas sur un cordage 54 couplé à la chaîne 50 en arrière de la charge en même temps que la descente du treuil (une fois la charge déposée) font de cette manoeuvre un décrochage à distance du maillon ovale 54 retenu à l'intérieur du crochet à l'autre extrémité de chaîne 50, réglée bien entendu à la section de la charge à manutentionner.The principle is to equip the hook, without any modification to its manufacturing standards, a quick link 51 of adequate size on the back of the hook, the link receiving the load chain 50, the weight of the latter to find a point of support on the link where the brittle 52 passes to actuate a safety latch 53 of the hook 5. The pull down on a rope 54 coupled to the chain 50 behind the load at the same time as the descent of the winch (Once the load deposited) make this maneuver a remote stall of the oval link 54 retained within the hook at the other end of chain 50, set course to the section of the load to handle.

Ce principe permet, sans risque, d'éliminer la manutention d'une échelle (appuyée au centre d'une pièce juste déposée et par conséquent, non fixée, ce qui suppose un risque) : le travailleur n'a donc plus à monter et descendre l'échelle. Ce système de décrochage est donc un gage de sécurité et d'allègement de pénibilité indéniable pour les travailleurs.This principle allows, without risk, to eliminate the handling of a ladder (supported in the center of a fair piece and therefore not fixed, which implies a risk): the worker no longer has to climb and go down the ladder. This stall system is therefore a guarantee of safety and undeniable hardship for workers.

Dans un autre cas d'application, et suivant les besoins des utilisateurs, le système pourra être également utilisé en monte-charge.In another case of application, and according to the needs of users, the system can also be used in freight elevator.

Cette option, constituée de deux éléments principaux, comprend deux bras 90 au bout desquels sont fixées deux roues 91.This option consists of two main elements, comprises two arms 90 at the end of which are fixed two wheels 91.

Il est possible d'orienter les roues 91 dans deux positions différentes. La première position (figures 13 et 14) consiste à orienter les roues 91 de manière à ce que leurs axes soient concourants en « O » avec l'axe de l'essieu de la machine.It is possible to orient the wheels 91 in two different positions. The first position ( Figures 13 and 14 ) is to orient the wheels 91 so that their axes are concurrent in "O" with the axis of the axle of the machine.

Ainsi, pour décharger l'élément monté, l'appareil sera déplacé par rotation autour du point « O ». Cette première configuration correspond au cas où un obstacle 92 (mur, poteaux, ...) est situé derrière la machine.Thus, to unload the mounted element, the apparatus will be rotated around the "O" point. This first configuration corresponds to the case where an obstacle 92 (wall, posts, ...) is located behind the machine.

Selon une deuxième position des roues 91 dans laquelle un obstacle est placé sur le côté du monte charge, la position des roues est telle que celles-ci sont orientées dans le même sens que celles de la machine (figures 15 et 16).According to a second position of the wheels 91 in which an obstacle is placed on the side of the hoist, the position of the wheels is such that they are oriented in the same direction as those of the machine ( Figures 15 and 16 ).

Ceci permet d'obtenir un déplacement par translation de l'appareil. Dans ce cas, un élément de sécurité assure le blocage des roues à l'aide de cales fixées à un élément rigide.This makes it possible to obtain a displacement by translation of the apparatus. In this case, a security element ensures the locking of the wheels with shims fixed to a rigid element.

Claims (8)

  1. Device for lifting a load, in particular a structural element, of the type comprising a rolling chassis (10) which is intended to support a mast (1) that is inclined so that the upper end of the mast (1) is at the vertical of a perimeter on the ground delimited by at least three support points on the ground for the device, the mast (1) being mounted in a region of one end of the device,
    characterised in that the device comprises rigidification and/or stabilisation means (6) comprising at least one cross-member (61) which extends between the chassis (10) and one of the support points at a front end of the device and at least one connection bar (62) which extends between the mast (1) and the cross-member (61), the rigidification and/or stabilisation means (6) comprising at least two consoles which extend from the mast (1) and which diverge towards two support points on the ground, each forming a front end of the device, the consoles (6) each comprising the cross-member (61), a bar (63) for assembly of the mast or a support of the mast and the connection bar which is a curved bar (62) which connects the opposing ends of the cross-member and the assembly bar in order to transmit applied loads tangentially, or substantially tangentially, to the cross-member (61) and in a manner directed towards the front end.
  2. Device for lifting a load according to claim 1, characterised in that the rigidification means (6) are connected to the mast (1) by the curved bar in order to transmit applied loads to the mast (1) tangentially or substantially tangentially.
  3. Device for lifting a load according to claim 1 or claim 2, characterised in that the consoles (6) comprise at least one force member (622) which connects, on the one hand, the curved bar (62) and, on the other hand, the cross-member (61) and/or the assembly bar (63).
  4. Device for lifting a load according to any one of claims 1 to 3, characterised in that the consoles (6) are removably coupled to the chassis.
  5. Device for lifting a load according to any one of claims 1 to 4, characterised in that the chassis (10) has a sheath (11) which is intended to receive the mast in a removable manner.
  6. Device for lifting a load according to any one of claims 1 to 5, characterised in that the mast (1) is intended to be coupled alternatively to a hoisting end-piece and a drawing end-piece.
  7. Device for lifting a load according to any one of claims 1 to 6, characterised in that it comprises two feet (7) for support on the ground in the region of the rear end of the device.
  8. Device for lifting a load according to claim 7, characterised in that the chassis (10) has an axle which carries at least one wheel (101) at each of the ends thereof, the device comprising a winch (9) from which a hoisting cable (3) extends, the chassis (10) carrying a set of at least two pulleys (111), (121) around which the cable (3) can be wound, the pulleys (111), (121) being mounted on sliding elements (11), (12) along the axis of the mast (1), one of the sliding elements (12) being fixedly joined to the axle, in such a manner that traction of the cable (3) by the winch (9) moves the two sliding elements (11), (12) closer together, the device being supported on the ground by means of the feet (7).
EP07111127A 2006-07-06 2007-06-27 Device for lifting a load, in particular a framework beam or flashboard, comprising a chassis bearing a tilted mast and comprising means for rigidification and/or stabilisation Not-in-force EP1878688B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0606133A FR2903396B1 (en) 2006-07-06 2006-07-06 DEVICE FOR LIFTING A LOAD, IN PARTICULAR A BEAM OR FRAMEWORK, COMPRISING A CHASSIS CARRYING A MAT INCLINED AND COMPRISING RIGIDIFICATION AND / OR STABILIZATION MEANS

Publications (2)

Publication Number Publication Date
EP1878688A1 EP1878688A1 (en) 2008-01-16
EP1878688B1 true EP1878688B1 (en) 2011-11-30

Family

ID=37622122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07111127A Not-in-force EP1878688B1 (en) 2006-07-06 2007-06-27 Device for lifting a load, in particular a framework beam or flashboard, comprising a chassis bearing a tilted mast and comprising means for rigidification and/or stabilisation

Country Status (3)

Country Link
EP (1) EP1878688B1 (en)
AT (1) ATE535486T1 (en)
FR (1) FR2903396B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1266569A (en) * 1916-03-02 1918-05-21 Pull U Out Sales Co Portable crane.
US1435065A (en) * 1921-06-04 1922-11-07 Ernest Holmes Company Towing and hoisting device
DE848995C (en) * 1951-03-01 1952-09-11 Georg Kirsten Assembly crane
FR2358353A1 (en) * 1976-07-13 1978-02-10 Bonny Pierre Mobile crane for light loads - has wheeled tripod base and vertical swinging jib with manual winch and is of tubular construction for dismantling

Also Published As

Publication number Publication date
ATE535486T1 (en) 2011-12-15
EP1878688A1 (en) 2008-01-16
FR2903396A1 (en) 2008-01-11
FR2903396B1 (en) 2008-09-19

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