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EP0701963B1 - Motorised lift truck with telescopic arm - Google Patents

Motorised lift truck with telescopic arm Download PDF

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Publication number
EP0701963B1
EP0701963B1 EP95402069A EP95402069A EP0701963B1 EP 0701963 B1 EP0701963 B1 EP 0701963B1 EP 95402069 A EP95402069 A EP 95402069A EP 95402069 A EP95402069 A EP 95402069A EP 0701963 B1 EP0701963 B1 EP 0701963B1
Authority
EP
European Patent Office
Prior art keywords
telescopic arm
truck
truck according
chassis
lifting
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.)
Expired - Lifetime
Application number
EP95402069A
Other languages
German (de)
French (fr)
Other versions
EP0701963B2 (en
EP0701963A1 (en
Inventor
Marcel-Claude Braud
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.)
Manitou BF SA
Original Assignee
Manitou BF SA
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
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Priority claimed from FR9410953A external-priority patent/FR2724374B1/en
Priority claimed from FR9500033A external-priority patent/FR2728884A1/en
Application filed by Manitou BF SA filed Critical Manitou BF SA
Publication of EP0701963A1 publication Critical patent/EP0701963A1/en
Application granted granted Critical
Publication of EP0701963B1 publication Critical patent/EP0701963B1/en
Publication of EP0701963B2 publication Critical patent/EP0701963B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07563—Fork-lift trucks adapted to be carried by transport vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/065—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted
    • B66F9/0655—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted with a telescopic boom

Definitions

  • the invention relates to a carriage motorized handling, especially of the kind capable of being on board the back of a carrier vehicle.
  • carts suitable to be loaded on a carrier vehicle such as a truck, which can be used loading and unloading the truck and then be attached to the back of it for transportation.
  • This kind of cart is generally of little realization bulky, so as to protrude from the truck by a small distance, its chassis being constructed so that the front wheels are near the front end of its loading fork.
  • motorized handling trucks of the aforementioned type generally include a chassis having a U-shaped configuration open towards the front, equipped with two front wheels and one rear wheel so that the lifting means extend thus in their most retracted position between the lateral branches of the U-shaped chassis.
  • a general constraint for the design of truck mounted carts is that these carts must be as light as possible so as not to decrease notably the payload of the truck. This is the reason which on-board carts are generally without counterweights and designed so that the load is arranged between the wheel arms at the rear of the wheels front of the truck in transport position. However, he is necessary to be able to deposit or take charge on the truck bed if the front wheels are not can not pass under said plate, to provide auxiliary devices for advancing the loading forks in front of the front wheels: in this static position of loading, the load can be lifted by a trolley on board is substantially equal to the total weight at cart empty.
  • Document US 4,826,474 describes a carriage motorized handling unit capable of being loaded at the rear of a carrier vehicle, while the document EP 325064 describes a self-propelled forklift which is not suitable for be on the back of a carrier vehicle.
  • on-board carts of known type are generally produced in the form of a double-effect vertical mast carriage: this double-acting vertical mast allows handling and transport and also facilitates the loading of the trolley the rear of the truck using a known technique for example according to document FR 2 298 454.
  • the ancillary devices known for moving the forks at the front of the front wheels in the case of a grip load in front of the front wheels are of the fork type telescopic, fork extender, or mast retractable.
  • each telescopic fork has a sliding sleeve on a support guided by slides or rollers and driven by a jack synchronized with the deployment of the other fork.
  • This arrangement had the disadvantage that the telescopic forks are subjected to a rapid wear by friction in contact with the ground and requires keep the forks perfectly horizontal when they are in the deployed position, because the load located far from the load backrest and the apron of the mast, is likely to slide abruptly until load backrest and thus cause accidents undesirable.
  • this provision leads to high manufacturing costs and maintenance costs important for operational reliability relatively small.
  • a deformable scissor structure connects the vertical mast and the apron supporting the forks, thus displacing the forks horizontally forward when deformation of the scissor structure.
  • This system presents on the one hand the disadvantage of increasing the total overshoot from the carriage to the rear of the truck, from a distance corresponding to the length of the deformable structure at scissors in the folded position, which increases the length of the total rolling assembly including the carrier vehicle and the on-board cart, and on the other hand the disadvantage of reducing the payload of the vehicle corresponding carrier of the additional weight added by the presence of this deformable structure with scissors.
  • the front forks are deported from the mast of the value corresponding to this spacing, which reduces the transport capacity of truck load; while in loading position static on site, the payload of the truck is reduced due to the displacement of the center of gravity resulting from the additional weight of the deformable scissor structure, weight applied in front of the front wheels.
  • the mast In retractable mast devices, the mast is mounted on a structure that slides inside the carriage chassis.
  • This layout has the same disadvantages that the fork extensor system in due to the fact that the forward displacement of the assembly comprising the mast and its supporting structure causes a significant forward movement of the center of gravity of the carriage, displacement resulting in a reduction notable load carrying capacity and stability in static loading on site.
  • mast trolleys vertical which is not covered by the present invention, move the load-bearing forks sideways to position in correspondence with the charges to handle.
  • the lateral movement of the entire lifting structure comprising a vertical mast carrying one or more aprons can also be made in relation to the supporting frame by appropriate means.
  • the implementation of the lateral displacement of the forks requires setting up intermediate decks or load-bearing structures important intermediaries that increase the cost of forklift and in particular increase its weight total laden, so the payload of the truck is reduced to total weight under constant load, and so that the manufacturing cost of the cart is increased by noticeably.
  • the object of the invention is to remedy the aforementioned drawbacks of the prior art, by creating a new motorized handling cart capable of being on the back of a carrier vehicle so simple and fast.
  • the invention also aims to apply the principle of lateral displacement of the supporting structure at trolley with telescopic arm, without significant increase mechanical organ, while allowing exploitation presenting the same performances as those of art prior.
  • a trolley according to the invention comprises a chassis 1 having a U-shaped configuration opening towards the front, a line 2, a powertrain 3 and means for lifting 4.
  • a branch 1a of the chassis carries a front wheel 5 while the other branch 1b carries the other front wheel 6.
  • the rear steering wheel 7 is mounted substantially at the middle of the main body of the chassis. Rear wheel steering 7 is controlled by a steering wheel 8 located in the operator station 2 which also includes all the components for controlling the lifting means 4.
  • the powertrain 3 is preferably a group comprising a heat engine driving a pump hydraulics, distribution and control components necessary being grouped with powertrain 3 and controlled directly from the cockpit 2.
  • the lifting means 4 have a telescopic arm 9 pivotally mounted around a substantially horizontal axis 10 located at the rear of the chassis 1 substantially above the rear wheel director 7.
  • the control and driving position is located on one side of the truck, the powertrain 3 is located side opposite to the control and driving position, and the arm telescopic 9 in its lowered and retracted position corresponding to the transport of a load passes between the operator station 2 and powertrain 3.
  • This arrangement thus provides excellent visibility on the load and on the lifting means 4, unlike the arrangement of the prior art where the mast retractable obstructed operator visibility.
  • the telescopic arm 9 carries at its end distant from the pivot axis 10 a gripping member 11 swiveling about a horizontal axis 12 under the action of an actuating cylinder not shown and of a type known per se.
  • the gripping member 11 is preferably shaped like an apron supporting forks 13a, 13b.
  • the forks 13a, 13b can start from the lowered position and retracted from the telescopic arm 9 corresponding to the transport of a charge and shown in solid lines, to go to other horizontal or tilted positions digging or a direction of discharge shown in lines dotted.
  • the telescopic arm 9 is extendable under the action an internal cylinder not shown and pivots under the action a lifting cylinder 14 disposed laterally relative to the arm and fixed to a bracket fixed to the beam of the arm telescopic 9.
  • the trolley is advantageously fitted according to the invention of a compensation cylinder, capable of maintaining the forks 13a, 13b horizontal during transport of the load in case of carriage movement on ground crashed.
  • the lifting cylinder 14 and the cylinder compensation 15 are mounted on either side of the beam of the telescopic arm 9, in one position does not interfere with driver visibility when the telescopic arm 9 is in the transport position, fully lowered and retracted.
  • all of the lifting means 4 can be moved transversely from a distance predetermined d so as to allow precise adjustment of the positioning of the lifting means during gripping of the load.
  • the lifting means 4 comprising the arm telescopic 9 are movable on the stroke d according to a controlled and preferably controlled movement hydraulically under the action of means of translation arranged in the vicinity of the pivot axis 10.
  • the actuating means hydraulics include at least one hydraulic cylinder, of which the direction of actuation is substantially parallel to the pivot axis 10.
  • a carriage according the invention presents a stability diagram without crutch corresponding to the lifting of a load of 9000 N at a distance of 1 meter in front of the front wheels: thus obtains performances equivalent to or better than those of on-board carriages of the prior art.
  • the carts according to the invention have a range at the front of the wheels significantly higher than the carts prior art.
  • Figure 5 shows a stability diagram with stand even better compared to the diagram stability without stand in Figure 4 and relative to characteristics of the on-board carriages of the prior art, in the case where one equips a trolley according to the invention of 16 retractable stabilizers able to come to bear on the ground in front of the contact point P of a front wheel 5 with the ground.
  • the retractable stabilizers 16 able to come in support on the ground in front of the wheel contact points front 5 with the ground are fixed to the chassis 1 of the carriage according to the invention in a manner known per se for the attachment of stabilizers on on-board trucks prior art and analogously controlled by a actuating cylinder substantially pushing vertical.
  • a method of loading a trolley according to the invention and securing to a carrier vehicle comprises the steps described below.
  • the carriage then rests under the effect of its own weight on the support 21 on which it is applied by the telescopic arm in fully retracted position: the balancing position of the machine load according to the invention embedded in the back of the carrier vehicle is perfectly stable and allows transport over long distances.
  • a means is provided for additional locking of the truck mounted on the carrier vehicle with the support 21 secured to the vehicle carrier.
  • This locking means can for example have two side locks controlled directly from the by means of a lever arranged in the driving station 2 and control unit. These side locks can be mechanical or hydraulic locks, or electrically operated.
  • the means lock is controlled by stopping the engine trolley or the interruption of electric power to the trolley, or the hydraulic power interruption of the truck.
  • the powertrain 3 can advantageously be constituted by an electric group operating on battery in the case of applications prohibiting the use of heat engines.
  • a piston 30 secured to the axis pivot 10 of the telescopic arm is shown schematically by its main beam 9.
  • the piston 30 delimits two chambers 31a and 31b inside a shirt 32.
  • a first drilling 33a made substantially coaxially to the axis of pivoting 10 and a second drilling 33b made substantially coaxial to the pivot axis 10 allow the feeding of each room respectively 31a or 31b in hydraulic fluid.
  • the axis 10 is mounted integral with the chassis 1 by via two mounting parts 34a, 34b assembled to chassis 1 by screwing, for example screws not exceeding 35a, 35b, or by any other means allowing the establishment of the pivot axis 10 and the passage of the piston 30 by an orifice of diameter provided for this purpose.
  • the shirt 32 is closed at its ends by two closure rings 38a, 38b carrying seals sealing rings, the rings 38a, 38b being fixed in a manner known per se by screwing or equivalent means.
  • the structure thus described presents a double rod cylinder configuration, in which the piston 30 is fixed and the shirt 32 moves in a first sense when chamber 31a is pressurized hydraulic and in a second direction opposite to said first sense when chamber 31b is pressurized hydraulic.
  • a person skilled in the art can thus determine without difficulty a transverse displacement race d in function of the internal dimensions of the jacket 32 and the width of the piston 30 remaining stationary relative to the axis pivot 10 and relative to chassis 1 of the carriage elevator.
  • each support sleeve 36a or 36b is integral with a bracket 37a or 37b which is itself connected to the main beam of the telescopic lifting arm of the trolley according to the invention.
  • the invention makes it possible to carry out in a manner simple lateral movement that does not hinder the pivoting of the telescopic arm, the displacement means lateral allowing the arm to pivot simultaneously telescopic around the substantially horizontal axis 10.
  • a piston 40 is integral with the pivot axis 10 of the telescopic arm shown schematically by its main beam 9.
  • the piston 40 delimits two chambers 41a and 41b inside a shirt 42.
  • two supply or discharge orifices are made hydraulic fluids 43a, 43b directly in the jacket 42.
  • Such threaded orifices 43a, 43b for supplying hydraulic fluid are of known type and do not require no more detailed description.
  • the axis 10 is mounted integral with the chassis 1 by through two mounting pieces 44a, 44b assembled to chassis 1 for example by screwing, screws not exceeding 45a, 45b, or by any other means allowing the establishment of the pivot axis 10 and the passage of the piston 40 by an orifice of diameter provided for this purpose.
  • the shirt 42 is closed at its ends by two closure rings 48a, 48b carrying seals suitable sealing, the rings 48a, 48b being fixed in a manner known per se by screwing or equivalent means.
  • the structure thus described presents a double rod cylinder configuration, in which the piston 40 is fixed and the shirt 42 moves in a first sense when chamber 41a is pressurized hydraulic and in a second direction opposite to said first sense when chamber 41b is pressurized hydraulic.
  • a person skilled in the art can thus determine without difficulty a transverse displacement race d in function of the internal dimensions of the jacket 42 and the width of the piston 40 remaining stationary relative to the axis pivot 10 and relative to chassis 1 of the carriage elevator.
  • each support sleeve 46a or 46b is integral with a bracket 47a or 47b which is itself connected to the main beam of the telescopic lifting arm of the trolley according to the invention.
  • the invention makes it possible to carry out in a manner simple lateral movement that does not hinder the pivoting of the telescopic arm, the displacement means lateral allowing the arm to pivot simultaneously telescopic around the substantially horizontal axis 10.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Handcart (AREA)

Description

L'invention est relative à un chariot de manutention motorisé, notamment du genre apte à être embarqué à l'arrière d'un véhicule porteur.The invention relates to a carriage motorized handling, especially of the kind capable of being on board the back of a carrier vehicle.

On connaít des chariots aptes à être embarqués sur un véhicule porteur tel qu'un camion, pouvant être utilisés au chargement et au déchargement du camion et ensuite être fixés à l'arrière de celui-ci pour être ainsi transportés. Ce genre de chariot est généralement de réalisation peu encombrante, de manière à dépasser du camion d'une faible distance, son châssis étant réalisé de manière que les roues avant soient voisines de l'extrémité avant de sa fourche de chargement.We know of carts suitable to be loaded on a carrier vehicle such as a truck, which can be used loading and unloading the truck and then be attached to the back of it for transportation. This kind of cart is generally of little realization bulky, so as to protrude from the truck by a small distance, its chassis being constructed so that the front wheels are near the front end of its loading fork.

A cet effet, les chariots de manutention motorisés du type précité comportent généralement un châssis présentant une conformation en U ouvert vers l'avant, équipé de deux roues avant et d'une roue arrière directrice, de sorte que les moyens de levage s'étendent ainsi dans leur position la plus rétractée entre les branches latérales du châssis en U.To this end, motorized handling trucks of the aforementioned type generally include a chassis having a U-shaped configuration open towards the front, equipped with two front wheels and one rear wheel so that the lifting means extend thus in their most retracted position between the lateral branches of the U-shaped chassis.

Une contrainte générale pour la conception des chariots embarqués sur camion est que ces chariots doivent être aussi légers que possible pour ne pas diminuer notablement la charge utile du camion. C'est la raison pour laquelle les chariots embarqués sont généralement dépourvus de contrepoids et conçus de manière que la charge soit disposée entre les bras de roues à l'arrière des roues avant du chariot en position de transport. Cependant, il est nécessaire pour pouvoir déposer ou prendre une charge sur le plateau du camion dans le cas où les roues avant ne peuvent pas passer sous ledit plateau, de prévoir des dispositifs annexes pour avancer les fourches de chargement en avant des roues avant : dans cette position statique de chargement, la charge pouvant être levée par un chariot embarqué est sensiblement égale au poids total à vide du chariot. Le document US 4,826,474 décrit un chariot de manutention motorisé apte à être embarqué à l'arrière d'un véhicule porteur, tandis que le document EP 325064 décrit un chariot élévateur automoteur qui n'est pas apte à être embarqué à l'arrière d'un véhicule porteur.A general constraint for the design of truck mounted carts is that these carts must be as light as possible so as not to decrease notably the payload of the truck. This is the reason which on-board carts are generally without counterweights and designed so that the load is arranged between the wheel arms at the rear of the wheels front of the truck in transport position. However, he is necessary to be able to deposit or take charge on the truck bed if the front wheels are not can not pass under said plate, to provide auxiliary devices for advancing the loading forks in front of the front wheels: in this static position of loading, the load can be lifted by a trolley on board is substantially equal to the total weight at cart empty. Document US 4,826,474 describes a carriage motorized handling unit capable of being loaded at the rear of a carrier vehicle, while the document EP 325064 describes a self-propelled forklift which is not suitable for be on the back of a carrier vehicle.

Pour satisfaire aux contraintes précitées, les chariots embarqués de type connu sont généralement réalisés sous forme de chariot à mât vertical à double effet : ce mât vertical à double effet permet la manutention et le transport et facilite également le chargement du chariot à l'arrière du camion selon une technique connue par exemple d'après le document FR 2 298 454.To meet the above constraints, on-board carts of known type are generally produced in the form of a double-effect vertical mast carriage: this double-acting vertical mast allows handling and transport and also facilitates the loading of the trolley the rear of the truck using a known technique for example according to document FR 2 298 454.

Les dispositifs annexes connus pour déplacer les fourches à l'avant des roues avant dans le cas d'une prise de charge en avant des roues avant sont du type à fourches télescopiques, à extenseur de fourche, ou à mât rétractable.The ancillary devices known for moving the forks at the front of the front wheels in the case of a grip load in front of the front wheels are of the fork type telescopic, fork extender, or mast retractable.

Dans le cas des fourches télescopiques, chaque fourche télescopique présente un fourreau coulissant sur un support guidé par des glissières ou des galets et entraíné par un vérin de manière synchronisée avec le déploiement de l'autre fourche. Cette disposition présenta l'inconvénient selon lequel las fourches télescopiques sont soumises à une usure rapide par frottement au contact du sol et nécessite de maintenir les fourches parfaitement horizontales lorsqu'elles sont an position déployée, car la charge se trouvant éloignée du dosseret de charge et du tablier du mât, est susceptible de glisser brusquement jusqu'au dosseret de charge et de provoquer ainsi des accidents indésirables. En outre, cette disposition entraíne des coûts de fabrication élevés et des coûts d'entretien importants pour une fiabilité de fonctionnement relativement faible.In the case of telescopic forks, each telescopic fork has a sliding sleeve on a support guided by slides or rollers and driven by a jack synchronized with the deployment of the other fork. This arrangement had the disadvantage that the telescopic forks are subjected to a rapid wear by friction in contact with the ground and requires keep the forks perfectly horizontal when they are in the deployed position, because the load located far from the load backrest and the apron of the mast, is likely to slide abruptly until load backrest and thus cause accidents undesirable. In addition, this provision leads to high manufacturing costs and maintenance costs important for operational reliability relatively small.

Dans le système à extenseur de fourches, une structure déformable à ciseaux relie le mât vertical et le tablier supportant les fourches, en déplaçant ainsi las fourches horizontalement vers l'avant lors de la déformation de la structure à ciseaux. Ce système présente d'une part l'inconvénient d'augmenter le dépassement total du chariot à l'arrière du camion, d'une distance correspondant à la longueur de la structure déformable à ciseaux en position repliée, ce qui augmente la longueur de l'ensemble total roulant comprenant le véhicule porteur et le chariot embarqué, et présente d'autre part l'inconvénient de diminuer la charge utile du véhicule porteur correspondant du poids supplémentaire ajouté par la présence de cette structure déformable à ciseaux. En outre, du fait que le tablier supportant les fourches est écarté du mât en position rentrée, les fourches avant sont déportées du mât de la valeur correspondant à cet écartement, ce qui diminue la capacité de transport de charge du chariot ; tandis qu'en position de chargement statique sur place, la charge utile du chariot est réduite en raison du déplacement du centre de gravité résultant du poids supplémentaire de la structure déformable à ciseaux, poids appliqué en avant des roues avant.In the fork extender system, a deformable scissor structure connects the vertical mast and the apron supporting the forks, thus displacing the forks horizontally forward when deformation of the scissor structure. This system presents on the one hand the disadvantage of increasing the total overshoot from the carriage to the rear of the truck, from a distance corresponding to the length of the deformable structure at scissors in the folded position, which increases the length of the total rolling assembly including the carrier vehicle and the on-board cart, and on the other hand the disadvantage of reducing the payload of the vehicle corresponding carrier of the additional weight added by the presence of this deformable structure with scissors. In addition, because the deck supporting the forks is spread the mast in the retracted position, the front forks are deported from the mast of the value corresponding to this spacing, which reduces the transport capacity of truck load; while in loading position static on site, the payload of the truck is reduced due to the displacement of the center of gravity resulting from the additional weight of the deformable scissor structure, weight applied in front of the front wheels.

Dans les dispositifs à mât rétractable, le mât est monté sur une structure qui coulisse à l'intérieur du châssis du chariot. Cette disposition présente les mêmes inconvénients que le système extenseur de fourches en raison du fait que le déplacement vers l'avant de l'ensemble comportant le mât et sa structure porteuse entraíne un déplacement important vers l'avant du centre de gravité du chariot, déplacement entraínant une réduction notable de la capacité de transport de charge et de la stabilité en chargement statique sur place.In retractable mast devices, the mast is mounted on a structure that slides inside the carriage chassis. This layout has the same disadvantages that the fork extensor system in due to the fact that the forward displacement of the assembly comprising the mast and its supporting structure causes a significant forward movement of the center of gravity of the carriage, displacement resulting in a reduction notable load carrying capacity and stability in static loading on site.

De la manière générale, tous les chariots aptes à être embarqués sur camion de l'art antérieur, c'est-à-dire des chariots à mât vertical à double effet, présentent l'inconvénient selon lequel le mât disposé à l'avant du conducteur obstrue le champ de visibilité sur la charge et sur la fourche située à l'opposé du poste de conduite. Ces chariots embarqués de l'art antérieur présentent genéralement une faible garde au sol et ne sont pas aptes à circuler sur des terrains accidentés. In general, all the trolleys suitable for be loaded onto a truck of the prior art, that is to say double-acting vertical mast carts have the disadvantage that the mast placed in front of the driver obstructs the field of view on the load and on the fork opposite the driving position. These embedded carts of the prior art present generally have low ground clearance and are not suitable for travel on uneven terrain.

Il est connu, dans ce domaine des chariots à mât vertical qui n'est pas visé par la présente invention, de déplacer les fourches porteuses latéralement pour les positionner en correspondance avec les charges à manutentionner. En particulier, on peut réaliser le deplacement latéral des fourches à l'aide d'un tablier intermédiaire portant les fourches et se deplaçant latéralement par rapport à un tablier principal. Le déplacement latéral de l'ensemble de la structure de levage comprenant un mât vertical portant un ou plusieurs tabliers peut également être réalisé par rapport au châssis porteur par des moyens appropriés.It is known in this field mast trolleys vertical which is not covered by the present invention, move the load-bearing forks sideways to position in correspondence with the charges to handle. In particular, the lateral displacement of the forks using an apron intermediate carrying the forks and moving laterally with respect to a main deck. The lateral movement of the entire lifting structure comprising a vertical mast carrying one or more aprons can also be made in relation to the supporting frame by appropriate means.

Dans cette technique connue, la mise en oeuvre du déplacement latéral des fourches exige de mettre en place des tabliers intermédiaires ou structures porteuses intermédiaires importantes qui renchérissent le coût du chariot élévateur et en particulier augmentent son poids total en charge, de sorte que la charge utile du chariot est diminuée à poids total en charge constant, et de sorte que le coût de fabrication du chariot est augmenté de manière notable.In this known technique, the implementation of the lateral displacement of the forks requires setting up intermediate decks or load-bearing structures important intermediaries that increase the cost of forklift and in particular increase its weight total laden, so the payload of the truck is reduced to total weight under constant load, and so that the manufacturing cost of the cart is increased by noticeably.

L'invention a pour but de remédier aux inconvénients précités de l'art antérieur, en créant un nouveau chariot de manutention motorisé apte à être embarqué à l'arrière d'un véhicule porteur de manière simple et rapide.The object of the invention is to remedy the aforementioned drawbacks of the prior art, by creating a new motorized handling cart capable of being on the back of a carrier vehicle so simple and fast.

L'invention a également pour but d'appliquer le principe du déplacement latéral de la structure porteuse au chariot à bras télescopique, sans augmentation notable d'organe mécanique, tout en permettant une exploitation présentant les mêmes performances que celles de l'art antérieur.The invention also aims to apply the principle of lateral displacement of the supporting structure at trolley with telescopic arm, without significant increase mechanical organ, while allowing exploitation presenting the same performances as those of art prior.

L'invention a pour objet un chariot de manutention motorisé, apte à être embarqué à l'arrière d'un véhicule porteur, du genre comportant un châssis présentant une conformation en U, équipé de deux roues avant et d'une roue arrière directrice, un poste de conduite et des moyens de levage, caractérisé en ce que les moyens de levage comportent un bras télescopique monté à pivotement sous l'action d'un vérin de levage autour d'un axe sensiblement horizontal situé à l'arrière du châssis sensiblement au-dessus de ladite roue arrière directrice et que

  • le poste de conduite est situé sur un côté du chariot, le groupe motopropulseur est situé du côté opposé au poste de conduite et le bras télescopique dans sa position abaissée et rétractée correspondant au transport d'une charge passe entre le poste de conduite et le groupe motopropulseur.
    • The subject of the invention is a motorized handling trolley, capable of being carried on the rear of a carrier vehicle, of the type comprising a chassis having a U-shaped configuration, equipped with two front wheels and a rear steering wheel, a driving position and lifting means, characterized in that the lifting means comprise a telescopic arm pivotally mounted under the action of a lifting cylinder around a substantially horizontal axis located at the rear of the chassis substantially above said steerable rear wheel and
  • the driving position is located on one side of the truck, the powertrain is located on the side opposite the driving position and the telescopic arm in its lowered and retracted position corresponding to the transport of a load passes between the driving position and the group powertrain.

    • Selon d'autres caractéristiques de l'invention :

    • le bras télescopique porte à son extrémité éloignée de l'axe de pivotement un organe de préhension orientable à pivotement autour d'un axe horizontal sous l'action d'un vérin d'actionnement.
    • le bras télescopiques porte à son extrémité éloignée de l'axe de pivotement un tablier supportant des fourches.
    • le bras télescopique équipé d'un tablier supportant des fourches est soumis à l'action d'un vérin de compensation, de manière à maintenir les fourches horizontales.
    • le châssis porte des stabilisateurs rétractables aptes à venir en appui sur le sol en avant des points de contact des roues avant avec le sol.
    • le vérin de levage et le vérin de compensation sont montés de part et d'autre de la poutre du bras télescopique.
    • le chariot comporte un moyen de verrouillage du chariot embarqué sur le véhicule porteur avec un support solidaire du véhicule porteur.
    • ledit moyen de verrouillage est commandé directement à partir du poste de conduite du chariot.
    • le moyen de verrouillage est commandé sur arrêt du moteur du chariot.
    According to other characteristics of the invention:
    • the telescopic arm carries at its end remote from the pivot axis a gripping member which can be pivotally pivoted about a horizontal axis under the action of an actuating cylinder.
    • the telescopic arm carries at its end remote from the pivot axis an apron supporting forks.
    • the telescopic arm equipped with an apron supporting the forks is subjected to the action of a compensating jack, so as to keep the forks horizontal.
    • the chassis carries retractable stabilizers capable of coming to bear on the ground in front of the points of contact of the front wheels with the ground.
    • the lifting cylinder and the compensation cylinder are mounted on either side of the beam of the telescopic arm.
    • the carriage comprises a means for locking the carriage on board the carrier vehicle with a support integral with the carrier vehicle.
    • said locking means is controlled directly from the driving position of the truck.
    • the locking means is controlled when the carriage motor stops.

    L'invention a également pour objet un chariot de manutention motorisé, à bras télescopique, comprenant un châssis monté sur une pluralité de roues dont l'une au moins est motrice, ledit châssis portant un groupe motopropulseur, une cabine et des moyens de levage disposés entre le groupe motopropulseur et la cabine, lesdits moyens de levage comprenant ledit bras télescopique monté à pivotement autour d'un axe sensiblement horizontal, caractérisé en ce que l'ensemble des moyens de levage comprenant le bras télescopique est déplaçable transversalement, de manière à permettre un réglage précis sur une distance prédéterminée du positionnement des moyens de levage en vue de la préhension de la charge et que

  • le bras télescopique est déplaçable transversalement sur son axe de pivotement sous l'action de moyens d'actionnement disposés au voisinage dudit axe de pivotement. Selon d'autres caractéristiques de l'invention :
    • lesdits moyens d'actionnement sont des moyens d'actionnement hydraulique comportant au moins un vérin hydraulique dont la direction d'actionnement est sensiblement parallèle à l'axe de pivotement du bras télescopique,
    • les moyens d'actionnement sont pratiquement coaxiaux à l'axe de pivotement du bras télescopique,
    • les moyens d'actionnement sont à double effet,
    • les moyens d'actionnement sont des moyens hydrauliques alimentés par des orifices sensiblement parallèles ou coaxiaux à l'axe de pivotement,
    • les moyens d'actionnement sont des moyens hydrauliques alimentés par des orifices sensiblement orthogonaux à l'axe de pivotement.
    • The invention also relates to a motorized handling trolley, with telescopic arm, comprising a chassis mounted on a plurality of wheels, at least one of which is driving, said chassis carrying a powertrain, a cabin and lifting means arranged between the powertrain and the cabin, said lifting means comprising said telescopic arm pivotally mounted about a substantially horizontal axis, characterized in that all of the lifting means comprising the telescopic arm can be moved transversely, so as to allow precise adjustment over a predetermined distance of the positioning of the lifting means for gripping the load and that
  • the telescopic arm is movable transversely on its pivot axis under the action of actuating means arranged in the vicinity of said pivot axis. According to other characteristics of the invention:
    • said actuation means are hydraulic actuation means comprising at least one hydraulic cylinder whose actuation direction is substantially parallel to the pivot axis of the telescopic arm,
    • the actuation means are practically coaxial with the pivot axis of the telescopic arm,
    • the actuation means are double-acting,
    • the actuation means are hydraulic means supplied by orifices substantially parallel or coaxial with the pivot axis,
    • the actuating means are hydraulic means supplied by orifices substantially orthogonal to the pivot axis.

    • L'invention sera mieux comprise grâce à la description qui va suivre donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • La figure 1 représente schématiquement une vue en élévation latérale selon la direction de la flèche I des figures 2 et 3 d'un chariot selon l'invention.
  • La figure 2 représente schématiquement une vue simplifiée de dessus dans le sens de la flèche II des figures 1 et 3 d'un chariot selon l'invention.
  • La figure 3 représente schématiquement une vue arrière dans le sens de la direction des flèches III des figures 1 et 2 d'un chariot selon l'invention.
  • Les figures 4 et 5 représentent des diagrammes de charge caractéristiques d'un chariot selon l'invention.
  • Les figures 6 à 8 représentent schématiquement les étapes d'un procédé d'embarquement d'un chariot selon l'invention à l'arrière d'un véhicule porteur.
  • La figure 9 représente schématiquement en coupe une vue partielle axiale d'un bras télescopique de chariot de manutention selon l'invention.
  • La figure 10 représente une vue en coupe axiale partielle d'un autre chariot selon l'invention.
    • The invention will be better understood thanks to the description which follows given by way of nonlimiting example with reference to the appended drawings in which:
  • Figure 1 schematically shows a side elevational view in the direction of arrow I of Figures 2 and 3 of a carriage according to the invention.
  • FIG. 2 schematically represents a simplified top view in the direction of arrow II in FIGS. 1 and 3 of a carriage according to the invention.
  • Figure 3 schematically shows a rear view in the direction of the arrows III of Figures 1 and 2 of a carriage according to the invention.
  • Figures 4 and 5 show load diagrams characteristic of a carriage according to the invention.
  • Figures 6 to 8 schematically represent the steps of a method of boarding a trolley according to the invention at the rear of a carrier vehicle.
  • FIG. 9 schematically shows in section a partial axial view of a telescopic arm of the industrial truck according to the invention.
  • FIG. 10 represents a view in partial axial section of another carriage according to the invention.

    • En référence aux figures 1 à 3, dans lesquelles les éléments identiques ou fonctionnellement équivalents sont repérés par des chiffres de référence identiques, un chariot selon l'invention comporte un châssis 1 présentant une conformation en U s'ouvrant vers l'avant, un poste de conduite 2, un groupe motopropulseur 3 et des moyens de levage 4.Referring to Figures 1 to 3, in which the identical or functionally equivalent elements are identified by identical reference numbers, a trolley according to the invention comprises a chassis 1 having a U-shaped configuration opening towards the front, a line 2, a powertrain 3 and means for lifting 4.

    Une branche 1a du châssis porte une roue avant 5 tandis que l'autre branche 1b porte l'autre roue avant 6. La roue arrière 7 directrice est montée sensiblement au milieu du corps principal du châssis. La roue arrière directrice 7 est commandée par un volant 8 situé dans le poste de conduite 2 qui comporte également tous les organes de commande des moyens de levage 4. A branch 1a of the chassis carries a front wheel 5 while the other branch 1b carries the other front wheel 6. The rear steering wheel 7 is mounted substantially at the middle of the main body of the chassis. Rear wheel steering 7 is controlled by a steering wheel 8 located in the operator station 2 which also includes all the components for controlling the lifting means 4.

    Le groupe motopropulseur 3 est de préférence un groupe comportant un moteur thermique entraínant une pompe hydraulique, les organes de distribution et de commande nécessaires étant regroupés avec le groupe motopropulseur 3 et commandés directement depuis le poste de conduite 2.The powertrain 3 is preferably a group comprising a heat engine driving a pump hydraulics, distribution and control components necessary being grouped with powertrain 3 and controlled directly from the cockpit 2.

    Selon l'invention, les moyens de levage 4 comportent un bras télescopique 9 monté à pivotement autour d'un axe 10 sensiblement horizontal situé à l'arrière du châssis 1 sensiblement au dessus de la roue arrière directrice 7.According to the invention, the lifting means 4 have a telescopic arm 9 pivotally mounted around a substantially horizontal axis 10 located at the rear of the chassis 1 substantially above the rear wheel director 7.

    Le poste de commande et de conduite est situé sur un côté du chariot, le groupe motopropulseur 3 est situé du côte opposé au poste de commande et de conduite, et le bras télescopique 9 dans sa position abaissée et rétractée correspondant au transport d'une charge passe entre le poste de conduite 2 et le groupe motopropulseur 3.The control and driving position is located on one side of the truck, the powertrain 3 is located side opposite to the control and driving position, and the arm telescopic 9 in its lowered and retracted position corresponding to the transport of a load passes between the operator station 2 and powertrain 3.

    Cette disposition fournit ainsi une excellente visibilité sur la charge et sur les moyens de levage 4, contrairement à la disposition de l'art antérieur où le mât rétractable obstruait la visibilité de l'opérateur.This arrangement thus provides excellent visibility on the load and on the lifting means 4, unlike the arrangement of the prior art where the mast retractable obstructed operator visibility.

    Le bras télescopique 9 porte à son extrémité éloignée de l'axe de pivotement 10 un organe de préhension 11 orientable à pivotement autour d'un axe horizontal 12 sous l'action d'un vérin d'actionnement non représenté et de type connu en soi.The telescopic arm 9 carries at its end distant from the pivot axis 10 a gripping member 11 swiveling about a horizontal axis 12 under the action of an actuating cylinder not shown and of a type known per se.

    L'organe de préhension 11 est de préférence conformé en tablier supportant des fourches 13a, 13b. Les fourches 13a, 13b peuvent partir de la position abaissée et rétractée du bras télescopique 9 correspondant au transport d'une charge et représentée en traits pleins, pour passer à d'autres positions horizontales ou inclinées dans un sens de cavage ou un sens de déversement représentées en traits pointillés.The gripping member 11 is preferably shaped like an apron supporting forks 13a, 13b. The forks 13a, 13b can start from the lowered position and retracted from the telescopic arm 9 corresponding to the transport of a charge and shown in solid lines, to go to other horizontal or tilted positions digging or a direction of discharge shown in lines dotted.

    Le bras télescopique 9 est extensible sous l'action d'un vérin intérieur non représenté et pivote sous l'action d'un vérin de levage 14 disposé latéralement par rapport au bras et fixé à une équerre solidaire de la poutre du bras télescopique 9.The telescopic arm 9 is extendable under the action an internal cylinder not shown and pivots under the action a lifting cylinder 14 disposed laterally relative to the arm and fixed to a bracket fixed to the beam of the arm telescopic 9.

    Dans le cas d'un transport de charge sur terrain accidenté, on équipe avantageusement le chariot selon l'invention d'un vérin de compensation, apte à maintenir les fourches 13a, 13b horizontales lors du transport de la charge dans le cas d'un déplacement du chariot sur terrain accidenté. De préférence, le vérin de levage 14 et le vérin de compensation 15 sont montés de part et d'autre de la poutre du bras télescopique 9, dans une position n'interférant pas avec la visibilité du conducteur lorsque le bras télescopique 9 est en position de transport, entièrement abaissé et rétracté.In the case of load transport on site damaged, the trolley is advantageously fitted according to the invention of a compensation cylinder, capable of maintaining the forks 13a, 13b horizontal during transport of the load in case of carriage movement on ground crashed. Preferably, the lifting cylinder 14 and the cylinder compensation 15 are mounted on either side of the beam of the telescopic arm 9, in one position does not interfere with driver visibility when the telescopic arm 9 is in the transport position, fully lowered and retracted.

    Avantageusement, l'ensemble des moyens de levage 4 est déplaçable transversalement d'une distance prédéterminée d de manière à permettre un réglage précis du positionnement des moyens de levage lors de la préhension de la charge.Advantageously, all of the lifting means 4 can be moved transversely from a distance predetermined d so as to allow precise adjustment of the positioning of the lifting means during gripping of the load.

    Ainsi, les moyens de levage 4 comprenant le bras télescopique 9 sont déplaçable sur la course d selon un mouvement commandé et contrôlé de préférence hydrauliquement sous l'action de moyens de translation disposés au voisinage de l'axe de pivotement 10.Thus, the lifting means 4 comprising the arm telescopic 9 are movable on the stroke d according to a controlled and preferably controlled movement hydraulically under the action of means of translation arranged in the vicinity of the pivot axis 10.

    De préférence, les moyens d'actionnement hydrauliques comportent au moins un vérin hydraulique, dont la direction d'actionnement est sensiblement parallèle à l'axe de pivotement 10.Preferably, the actuating means hydraulics include at least one hydraulic cylinder, of which the direction of actuation is substantially parallel to the pivot axis 10.

    En référence à la figure 4, un chariot selon l'invention présente un diagramme de stabilité sans béquille correspondant à la levée d'une charge de 9000 N à une distance de 1 mètre en avant des roues avant : on obtient ainsi des performances équivalentes à ou meilleures que celles des chariots embarqués de l'art antérieur. En particulier, les chariots selon l'invention ont une portée à l'avant des roues notablement supérieure aux chariots de l'art antérieur. Referring to Figure 4, a carriage according the invention presents a stability diagram without crutch corresponding to the lifting of a load of 9000 N at a distance of 1 meter in front of the front wheels: thus obtains performances equivalent to or better than those of on-board carriages of the prior art. In in particular, the carts according to the invention have a range at the front of the wheels significantly higher than the carts prior art.

    La figure 5 représente un diagramme de stabilité avec béquille encore amélioré par rapport au diagramme de stabilité sans béquille de la figure 4 et par rapport aux caractéristiques des chariots embarqués de l'art antérieur, dans le cas où l'on équipe un chariot selon l'invention de stabilisateurs 16 rétractables aptes à venir en appui sur le sol en avant du point de contact P d'une roue avant 5 avec le sol.Figure 5 shows a stability diagram with stand even better compared to the diagram stability without stand in Figure 4 and relative to characteristics of the on-board carriages of the prior art, in the case where one equips a trolley according to the invention of 16 retractable stabilizers able to come to bear on the ground in front of the contact point P of a front wheel 5 with the ground.

    Les stabilisateurs 16 rétractables aptes à venir en appui sur le sol en avant des points de contact des roues avant 5 avec le sol sont fixés sur le châssis 1 du chariot selon l'invention selon une manière connue en soi pour la fixation de stabilisateurs sur les chariots embarqués de l'art antérieur et commandés de manière analogue par un vérin d'actionnement exerçant une poussée sensiblement verticale.The retractable stabilizers 16 able to come in support on the ground in front of the wheel contact points front 5 with the ground are fixed to the chassis 1 of the carriage according to the invention in a manner known per se for the attachment of stabilizers on on-board trucks prior art and analogously controlled by a actuating cylinder substantially pushing vertical.

    En référence aux figures 6 à 8, un procédé de chargement d'un chariot selon l'invention et de solidarisation à un véhicule porteur comporte les étapes décrites ci-après.Referring to Figures 6 to 8, a method of loading a trolley according to the invention and securing to a carrier vehicle comprises the steps described below.

    En référence à la figure 6, on allonge le bras télescopique d'une longueur de l'ordre de 20 cm, de manière à enfiler les fourches 13a, 13b dans des fourreaux 20 prévus à cet effet et solidarisés au véhicule porteur sous le plateau de celui-ci de préférence par des moyens d'accrochage à fixation rapide de type connus en soi. A l'arrière des fourreaux 20, des supports 21 sont disposés dans une position prédéterminée permettant le passage des fourches 13a, 13b et du bras télescopique 9 légèrement étendu entre les supports 21.Referring to Figure 6, we extend the arm telescopic with a length of the order of 20 cm, so to thread the forks 13a, 13b into sleeves 20 provided for this purpose and secured to the carrier vehicle under the tray of it preferably by means quick attachment type known per se. AT the rear of the sleeves 20, supports 21 are arranged in a predetermined position allowing the passage of forks 13a, 13b and telescopic arm 9 slightly extended between the supports 21.

    Après avoir enfilé les fourches dans les fourreaux 20, on effectue un mouvement combiné de montée et de pivotement du chariot autour du bras télescopique 9 jusqu'à la position représentée à la figure 7 dans laquelle le châssis 1 est entièrement soulevé du sol et incliné légèrement vers l'avant d'un angle compris entre 10 et 15 degrés d'angles sexagésimaux.After putting the forks in the sheaths 20, a combined movement of ascent and pivoting of the carriage around the telescopic arm 9 up to the position shown in Figure 7 in which the frame 1 is completely raised from the ground and tilted slightly forward at an angle between 10 and 15 degrees of sexagesimal angles.

    A partir de la position de la figure 7, on rétracte complètement le bras télescopique 9, ce qui a pour effet de reposer le châssis 2 sur le support 21. On braque de préférence la roue directrice arrière 7 complètement à gauche ou complètement à droite, de manière à limiter le dépassement du chariot vers l'arrière du véhicule.From the position of figure 7, we retract the telescopic arm 9 completely, which has the effect of rest the chassis 2 on the support 21. We point preferably the rear steering wheel 7 completely at left or completely right, so as to limit the protrusion of the truck towards the rear of the vehicle.

    Le chariot repose alors sous l'effet de son propre poids sur le support 21 sur lequel il est appliqué par le bras télescopique en position complètement rétractée : la position d'équilibre du chargement de la machine selon l'invention embarquée à l'arrière du véhicule porteur est parfaitement stable et permet le transport sur de longues distances.The carriage then rests under the effect of its own weight on the support 21 on which it is applied by the telescopic arm in fully retracted position: the balancing position of the machine load according to the invention embedded in the back of the carrier vehicle is perfectly stable and allows transport over long distances.

    Avantageusement, on prévoit un moyen de verrouillage complémentaire du chariot embarqué sur le véhicule porteur avec le support 21 solidaire du véhicule porteur. Ce moyen de verrouillage peut par exemple comporter deux verrous latéraux commandés directement au moyen d'une manette disposée dans le poste 2 de conduite et de commande du chariot. Ces verrous latéraux peuvent être des verrous mécaniques ou à commande hydraulique, ou encore à commande électrique. Dans une variante préférée, le moyen de verrouillage est commandé par l'arrêt du moteur du chariot ou l'interruption d'énergie électrique du chariot, ou l'interruption d'énergie hydraulique du chariot.Advantageously, a means is provided for additional locking of the truck mounted on the carrier vehicle with the support 21 secured to the vehicle carrier. This locking means can for example have two side locks controlled directly from the by means of a lever arranged in the driving station 2 and control unit. These side locks can be mechanical or hydraulic locks, or electrically operated. In a preferred variant, the means lock is controlled by stopping the engine trolley or the interruption of electric power to the trolley, or the hydraulic power interruption of the truck.

    L'invention décrite en référence à des modes de réalisation particuliers n'y est nullement limitée mais couvre au contraire toute modification de forme et toute variante de réalisation dans le cadre de l'esprit de l'invention : ainsi, le groupe motopropulseur 3 peut avantageusement être constitué par un groupe électrique fonctionnant sur batterie dans le cas d'applications interdisant l'emploi de moteurs thermiques. The invention described with reference to modes of particular achievement is by no means limited to it but on the contrary covers any modification of form and any variant in the spirit of the invention: thus, the powertrain 3 can advantageously be constituted by an electric group operating on battery in the case of applications prohibiting the use of heat engines.

    En référence à la figure 9, dans un premier mode de réalisation de l'invention, un piston 30 solidaire de l'axe de pivotement 10 du bras télescopique est schématisé par sa poutre principale 9. Le piston 30 délimite deux chambres 31a et 31b à l'intérieur d'une chemise 32. Un premier perçage 33a pratiqué sensiblement coaxialement à l'axe de pivotement 10 et un deuxième perçage 33b pratiqué sensiblement coaxialement à l'axe de pivotement 10 permettent l'alimentation respectivement de chaque chambre 31a ou 31b en fluide hydraulique.With reference to FIG. 9, in a first mode of embodiment of the invention, a piston 30 secured to the axis pivot 10 of the telescopic arm is shown schematically by its main beam 9. The piston 30 delimits two chambers 31a and 31b inside a shirt 32. A first drilling 33a made substantially coaxially to the axis of pivoting 10 and a second drilling 33b made substantially coaxial to the pivot axis 10 allow the feeding of each room respectively 31a or 31b in hydraulic fluid.

    L'axe 10 est monté solidaire du châssis 1 par l'intermédiaire de deux pièces de montage 34a, 34b assemblées au châssis 1 par vissage, par exemple de vis non dépassantes 35a, 35b, ou par tout autre moyen permettant la mise en place de l'axe de pivotement 10 et le passage du piston 30 par un orifice de diamètre prévu à cet effet.The axis 10 is mounted integral with the chassis 1 by via two mounting parts 34a, 34b assembled to chassis 1 by screwing, for example screws not exceeding 35a, 35b, or by any other means allowing the establishment of the pivot axis 10 and the passage of the piston 30 by an orifice of diameter provided for this purpose.

    La chemise 32 est obturée à ses extrémités par deux bagues de fermeture 38a, 38b portant des joints d'étanchéité appropriés, les bagues 38a, 38b étant fixées de manière connue en soi par vissage ou moyen équivalent.The shirt 32 is closed at its ends by two closure rings 38a, 38b carrying seals sealing rings, the rings 38a, 38b being fixed in a manner known per se by screwing or equivalent means.

    La structure ainsi décrite présente une conformation en vérin à double tige, dans lequel le piston 30 est fixe et la chemise 32 se déplace dans un premier sens lorsque la chambre 31a est mise sous pression hydraulique et dans un deuxième sens opposé audit premier sens lorsque la chambre 31b est mise sous pression hydraulique.The structure thus described presents a double rod cylinder configuration, in which the piston 30 is fixed and the shirt 32 moves in a first sense when chamber 31a is pressurized hydraulic and in a second direction opposite to said first sense when chamber 31b is pressurized hydraulic.

    L'homme du métier peut ainsi déterminer sans difficulté une course de déplacement transversal d en fonction des dimensions internes de la chemise 32 et de la largeur du piston 30 restant immobile par rapport à l'axe de pivotement 10 et par rapport au châssis 1 du chariot élévateur.A person skilled in the art can thus determine without difficulty a transverse displacement race d in function of the internal dimensions of the jacket 32 and the width of the piston 30 remaining stationary relative to the axis pivot 10 and relative to chassis 1 of the carriage elevator.

    Dans le déplacement imposé par la pression hydraulique introduite dans l'une ou l'autre chambre 31a ou 31b, la chemise 32 appuie par l'intermédiaire de l'une ou l'autre bague de fermeture 38b ou 38a sur des douilles d'appui 36b ou 36a. Chaque douille d'appui 36a ou 36b est solidaire d'une équerre 37a ou 37b qui est elle-même reliée à la poutre principale du bras élévateur télescopique du chariot selon l'invention.In the displacement imposed by pressure hydraulic introduced into one or the other chamber 31a or 31b, the shirt 32 presses via one or the other closure ring 38b or 38a on sockets support 36b or 36a. Each support sleeve 36a or 36b is integral with a bracket 37a or 37b which is itself connected to the main beam of the telescopic lifting arm of the trolley according to the invention.

    Ainsi, l'invention permet de réaliser de manière simple un déplacement latéral qui n'entrave pas le pivotement du bras télescopique, les moyens de déplacement latéral permettant simultanément le pivotement du bras télescopique autour de l'axe sensiblement horizontal 10.Thus, the invention makes it possible to carry out in a manner simple lateral movement that does not hinder the pivoting of the telescopic arm, the displacement means lateral allowing the arm to pivot simultaneously telescopic around the substantially horizontal axis 10.

    En référence à la figure 10, dans un autre mode de réalisation de l'invention, un piston 40 est solidaire de l'axe de pivotement 10 du bras télescopique schématisé par sa poutre principale 9. Le piston 40 délimite deux chambres 41a et 41b à l'intérieur d'une chemise 42. Pour éviter le perçage des orifices de diamètre réduit et de longueur importante 33a, 33b du mode de réalisation de la figure 9, on réalise deux orifices d'alimentation ou d'évacuation de fluides hydrauliques 43a, 43b directement dans la chemise 42. De tels orifices taraudés 43a, 43b d'alimentation en fluide hydraulique sont de type connu en soi et ne nécessitent pas de description plus détaillée.With reference to FIG. 10, in another mode of embodiment of the invention, a piston 40 is integral with the pivot axis 10 of the telescopic arm shown schematically by its main beam 9. The piston 40 delimits two chambers 41a and 41b inside a shirt 42. To avoid the drilling holes of reduced diameter and length important 33a, 33b of the embodiment of FIG. 9, two supply or discharge orifices are made hydraulic fluids 43a, 43b directly in the jacket 42. Such threaded orifices 43a, 43b for supplying hydraulic fluid are of known type and do not require no more detailed description.

    L'axe 10 est monté solidaire du châssis 1 par l'intermédiaire de deux pièces de montage 44a, 44b assemblées au châssis 1 par exemple par vissage, de vis non dépassantes 45a, 45b, ou par tout autre moyen permettant la mise en place de l'axe de pivotement 10 et le passage du piston 40 par un orifice de diamètre prévu à cet effet.The axis 10 is mounted integral with the chassis 1 by through two mounting pieces 44a, 44b assembled to chassis 1 for example by screwing, screws not exceeding 45a, 45b, or by any other means allowing the establishment of the pivot axis 10 and the passage of the piston 40 by an orifice of diameter provided for this purpose.

    La chemise 42 est obturée à ses extrémités par deux bagues de fermeture 48a, 48b portant des joints d'étanchéité appropriés, les bagues 48a, 48b étant fixées de manière connue en soi par vissage ou moyen équivalent.The shirt 42 is closed at its ends by two closure rings 48a, 48b carrying seals suitable sealing, the rings 48a, 48b being fixed in a manner known per se by screwing or equivalent means.

    La structure ainsi décrite présente une conformation en vérin à double tige, dans lequel le piston 40 est fixe et la chemise 42 se déplace dans un premier sens lorsque la chambre 41a est mise sous pression hydraulique et dans un deuxième sens opposé audit premier sens lorsque la chambre 41b est mise sous pression hydraulique.The structure thus described presents a double rod cylinder configuration, in which the piston 40 is fixed and the shirt 42 moves in a first sense when chamber 41a is pressurized hydraulic and in a second direction opposite to said first sense when chamber 41b is pressurized hydraulic.

    L'homme du métier peut ainsi déterminer sans difficulté une course de déplacement transversal d en fonction des dimensions internes de la chemise 42 et de la largeur du piston 40 restant immobile par rapport à l'axe de pivotement 10 et par rapport au châssis 1 du chariot élévateur.A person skilled in the art can thus determine without difficulty a transverse displacement race d in function of the internal dimensions of the jacket 42 and the width of the piston 40 remaining stationary relative to the axis pivot 10 and relative to chassis 1 of the carriage elevator.

    Dans le déplacement imposé par la pression hydraulique introduite dans l'une ou l'autre chambre 41a ou 41b, la chemise 42 appuie par l'intermédiaire de l'une ou l'autre bague de fermeture 48b ou 48a sur des douilles d'appui 46b ou 46a. Chaque douille d'appui 46a ou 46b est solidaire d'une équerre 47a ou 47b qui est elle-même reliée à la poutre principale du bras élévateur télescopique du chariot selon l'invention.In the displacement imposed by pressure hydraulic introduced into one or the other chamber 41a or 41b, the shirt 42 presses through one or the other closure ring 48b or 48a on sockets support 46b or 46a. Each support sleeve 46a or 46b is integral with a bracket 47a or 47b which is itself connected to the main beam of the telescopic lifting arm of the trolley according to the invention.

    Ainsi, l'invention permet de réaliser de manière simple un déplacement latéral qui n'entrave pas le pivotement du bras télescopique, les moyens de déplacement latéral permettant simultanément le pivotement du bras télescopique autour de l'axe sensiblement horizontal 10.Thus, the invention makes it possible to carry out in a manner simple lateral movement that does not hinder the pivoting of the telescopic arm, the displacement means lateral allowing the arm to pivot simultaneously telescopic around the substantially horizontal axis 10.

    L'invention bien que décrite en référence à deux modes de réalisation particuliers n'y est nullement limitée, mais couvre au contraire toute modification de forme et toute variante de réalisation dans le cadre et l'esprit de l'invention, notamment toute variante dans lesquelles le pivotement et le déplacement transversal peuvent être assurés coaxialement à l'axe de pivotement 10.The invention although described with reference to two particular embodiments is by no means there limited, but on the contrary covers any modification of form and any variant in the context and the spirit of the invention, in particular any variant in which pivoting and transverse displacement can be provided coaxially to the pivot axis 10.

    Claims (15)

    1. A motorised lift truck (3), adapted to be loaded on to the rear of a carrying vehicle, of the type having a chassis (1) of U-shaped configuration, equipped with two front wheels and a rear steering wheel, a driver's station (2) and lifting means (4), characterised in that the lifting means (4) have a telescopic arm (9) mounted to pivot under the action of a lifting jack (14) about a substantially horizontal shaft (10) located at the rear of the chassis (1) substantially above the rear steering wheel (7), and in that the driver's station (2) is located on one side of the truck, the motor propulsion unit (3) is located on the opposite side to the driver's station (2) and the telescopic arm (9) in its lowered and retracted position corresponding to the transport of a load, passes between the driver's station (2) and the motor propulsion unit (3).
    2. A truck according to Claim 1, characterised in that the telescopic arm carries, at its end remote from the pivotal shaft (10), a gripping member (11) directable by pivoting around a horizontal shaft (12) under the action of an operating jack.
    3. A truck according to one of the preceding claims, characterised in that the telescopic arm carries at its end remote from the pivotal shaft (10) a saddle (11) supporting forks (13a, 13b).
    4. A truck according to Claim 3, characterised in that the telescopic arm (9)m equipped with a saddle (11) supporting the forks (13a, 13b), is subject to the action of a compensation jack (15), so as to hold the forks (13a, 13b) horizontal.
    5. A truck according to one of the preceding claims, characterised in that the chassis (1) carries retractable stabilisers (16) adapted to come to bear on the ground in front of the contact points of the front wheels (5, 6) with the ground.
    6. A truck according to Claim 4, characterised in that the lifting jack (14) and the compensation jack (15) are mounted to either side of the beam of the telescopic arm (9).
    7. A truck according to one of the preceding claims, characterised in that it has means for locking the truck loaded on the carrying vehicle with a support (21) fast with the carrying vehicle.
    8. A truck according to Claim 7, characterised in that the locking means is controlled directly from the driver's station (2) of the truck.
    9. A truck according to Claim 7 or Claim 8, characterised in that the locking means is operated when the motor (3) of the truck stops.
    10. A motorised lift truck, having a telescopic arm, including a chassis mounted on a plurality of wheels, at least one of which is driven, the chassis carrying a motor propulsion unit, a cab and lifting means disposed between the motor propulsion unit and the cab, the lifting means including the telescopic arm pivotally mounted about a substantially horizontal shaft, characterised in that the assembly of lifting means (4) including the telescopic arm (9) is movable transversely, so as to permit accurate adjustment over a predetermined distance (d) of the positioning of the lifting means with a view to gripping the load, and in that the telescopic arm (9) is movable transversely on its pivotal shaft (10) under the action of actuating means disposed close to the pivotal shaft (10).
    11. A truck according to Claim 10, characterised in that the actuating means are hydraulic actuating means having at least one hydraulic jack of which the actuating direction is substantially parallel to the pivotal shaft (10) of the telescopic arm (9).
    12. A truck according to Claim 10 or Claim 11, characterised in that the actuation means are practically coaxial with the pivotal shaft (10) of the telescopic arm (9).
    13. A truck according to any one of Claims 10 to 12, characterised in that the actuation means are double acting.
    14. A truck according to any one of Claims 10 to 13, characterised in that the actuating means are hydraulic means supplied through orifices substantially parallel to or coaxial with the pivotal shaft (10).
    15. A truck according to any one of Claims 10 to 13, characterised in that the actuating means are hydraulic means supplied through orifices substantially perpendicular to the pivotal shaft.
    EP95402069A 1994-09-14 1995-09-13 Motorised lift truck with telescopic arm Expired - Lifetime EP0701963B2 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    FR9410953A FR2724374B1 (en) 1994-09-14 1994-09-14 MOTORIZED HANDLING TROLLEY SUITABLE FOR EMBEDDING AT THE BACK OF A CARRIER VEHICLE
    FR9410953 1994-09-14
    FR9500033 1995-01-04
    FR9500033A FR2728884A1 (en) 1995-01-04 1995-01-04 Fork lift truck designed to fit onto back of lorry

    Publications (3)

    Publication Number Publication Date
    EP0701963A1 EP0701963A1 (en) 1996-03-20
    EP0701963B1 true EP0701963B1 (en) 1998-02-04
    EP0701963B2 EP0701963B2 (en) 2004-08-18

    Family

    ID=26231398

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95402069A Expired - Lifetime EP0701963B2 (en) 1994-09-14 1995-09-13 Motorised lift truck with telescopic arm

    Country Status (4)

    Country Link
    US (1) US5813821A (en)
    EP (1) EP0701963B2 (en)
    CA (1) CA2158232C (en)
    DE (2) DE69501578T3 (en)

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    US6293579B1 (en) 1999-03-08 2001-09-25 Karl Schaeff Gmbh & Co Maschinenfabrik Mobile rig on wheels with transverse motion
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    Also Published As

    Publication number Publication date
    CA2158232A1 (en) 1996-03-15
    US5813821A (en) 1998-09-29
    DE69501578T2 (en) 1998-09-17
    EP0701963B2 (en) 2004-08-18
    EP0701963A1 (en) 1996-03-20
    DE701963T1 (en) 1996-12-12
    DE69501578D1 (en) 1998-03-12
    CA2158232C (en) 2001-08-07
    DE69501578T3 (en) 2005-02-03

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