EP1270496A1 - Load handling truck such as a stacker - Google Patents

Load handling truck such as a stacker Download PDF

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Publication number
EP1270496A1
EP1270496A1 EP02291537A EP02291537A EP1270496A1 EP 1270496 A1 EP1270496 A1 EP 1270496A1 EP 02291537 A EP02291537 A EP 02291537A EP 02291537 A EP02291537 A EP 02291537A EP 1270496 A1 EP1270496 A1 EP 1270496A1
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EP
European Patent Office
Prior art keywords
machine
transmission
wheels
wheel
load handling
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EP02291537A
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German (de)
French (fr)
Inventor
Michel Amiand
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Individual
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Individual
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Publication date
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Publication of EP1270496A1 publication Critical patent/EP1270496A1/en
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    • 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
    • B66F9/07568—Steering arrangements
    • 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
    • B66F9/08—Masts; Guides; Chains
    • B66F9/10—Masts; Guides; Chains movable in a horizontal direction relative to truck

Definitions

  • the present invention relates to a self-propelled machine handling loads such as stacker, preferably electric.
  • a handling loads of the type comprising a chassis consisting of at least two substantially parallel beams surmounted by a lifting and handling device charges and connected at one of their ends by a structure housing at least partially means of control, steering and propulsion of the machine, this chassis being carried by three wheels forming between them a isosceles triangle, the two so-called front wheels of the machine being arranged in the vicinity of the free ends of the side rails, the rear wheel, generally driving, extending directly above the structure.
  • Load handling devices of the above type are well known to those versed in this art.
  • these vehicles with an accompanying or on-board driver include a rear driving and steering wheel and two front wheels including one is mad while the other is fixed and positioned with its axis of rotation perpendicular to the axis longitudinal beams to allow movement frontal of the machine.
  • maneuvering such a machine is tedious due to the large turning radii.
  • Such maneuvers become impossible when the machine moves in an aisle lined with shelving and must handle loads of large dimensions, such as panels.
  • the document FR-A-2,319,521 describes a carriage not self-propelled with four wheels, each wheel being connected to the trolley by an articulated arm whose articulation can be immobilized in a determined position.
  • Front wheels are also permanently connected to the column of direction by endless transmissions so that the front wheels are constantly steer wheels.
  • the rear wheels can be steered by via disengageable transmissions coupled to front wheel transmissions.
  • An object of the present invention is to provide a machine self-propelled load handling machine whose design allows handling of large loads, including included inside aisles lined with shelving, this machine with a short turning radius, independently of its lateral or frontal movement mode.
  • the invention relates to a self-propelled machine handling loads, such as stacker, preferably electric, of the type comprising a chassis consisting of at least at least two substantially parallel beams surmounted by a device for lifting and handling loads and connected at one of their ends by a structure housing at at least partially control, steering and of propulsion of the machine, this chassis being carried by three wheels forming an isosceles triangle between them, the two so-called front wheels of the machine being arranged in the vicinity free ends of the side members, the rear wheel, generally motive, extending directly above the structure, characterized in that at least one of the wheels front and rear wheel of the craft are connected to the direction of the machine via a transmission differentiated, said transmissions being selectively can be activated via a control unit selecting a mode of operation of the machine for return the rear wheel or respectively the wheel or wheels front steering, these same wheels being, in the inactivated state of their transmission connecting them to the direction of the machine, arranged in a predetermined orientation position constant to cooperate in the operation of the machine mov
  • the axis of rotation of at least one front wheels is arranged perpendicular to the axis longitudinal beams to allow movement front of the vehicle by means of the rear steering wheel and in that, in a second mode of operation of the gear corresponding to the activation of the transmission between a front wheel and the steering, the axis of rotation of the rear wheel of the machine is arranged parallel to the axis longitudinal beams to allow movement lateral of the machine by means of the front steering wheel.
  • the load handling device object of the invention, also called stacker or forklift, includes a chassis consisting of at least two beams 2 substantially parallel surmounted by a device 3 for lifting and handling of loads.
  • the two beams 2 are generally made up of hollow metal profiles.
  • These longitudinal members 2 are connected at one of their ends by a structure 4 at least partially housing the means of control, steering and propulsion 7, 8, 9 of the machine.
  • the machine is preferably electrically propelled.
  • the 4 structure of the craft can affect a lot of forms. In the examples shown, it is made up by a box, the machine being of the conductor type accompanying.
  • structure 4 can affect the shape of a caisson surmounted by a cabin, the handling machine then being of the on-board driver type.
  • the structure has on its face of the top three controllers 20 managing the functions hydraulic and allowing in particular the displacement goes up and lowering of the lifting device, retraction of the mast 16 lifting which will be described below and the inclination of the apron 14 which will also be described below.
  • the chassis of the machine 1 is carried by three wheels 5A, 5B, 6 forming between them an isosceles triangle.
  • the two 5A wheels, 5B said before the machine are arranged in the vicinity of free ends of the side members 2 and allow the support of side rails 2 on the ground while the rear wheel 6, generally motive, extends vertically above structure 4.
  • At least one 5A front wheels 5A, 5B and the rear wheel 6 of the machine 1 are connected to the direction 7, 8, 9 of the machine by via a differentiated transmission 10, 11, more particularly shown in Figure 2.
  • These transmissions 10, 11 can be selectively activated by through a control member 12, such as a reverser consisting of an electric pushbutton, selecting a mode of operation of the machine 1 to make the wheel rear 6 or respectively the front wheel or wheels 5A, 5B guidelines.
  • These same wheels are, in the inactivated state of their transmission connecting them to the direction 7, 8, 9 of the craft, arranged in a predetermined position for cooperate in the maneuvering of the next movable machine at minus two operating modes, one says displacement front, corresponding to arrow F in FIG. 1, the other says lateral displacement, corresponding to the arrow L in figure 1.
  • the axis of rotation of minus one 5A of the front wheels 5A, 5B of the machine is arranged perpendicular to the longitudinal axis of the side members 2 to authorize a frontal movement of the machine by means of the rear wheel 6 steering.
  • the axis of rotation of the rear wheel 6 of the machine 1 is arranged parallel to the longitudinal axis of the side members 2 to allow a lateral movement of machine 1 by means of the front wheel 5A director.
  • each front wheel 5A, 5B of the machine 1 is connected to the direction 7, 8, 9 of the machine by a transmission 10 selectively activable
  • these transmissions 10 between wheel before 5A, 5B and direction of the machine operate in synchronism to allow parallel movement and simultaneous front wheels 5A, 5B.
  • this front wheel 5B is a crazy wheel. This second embodiment is shown in the figures.
  • the direction of the machine is made up of a steering column 8 angularly movable by via an operating member 7 such as a drawbar or a steering wheel. This direction can be assisted by means of a servo-control shown in 9 in the figures for facilitate management handling.
  • Each transmission 10, 11 consists of a driving pulley 10A, 11A and a driven pulley 10B, 11B interconnected by an endless organ 13 such as a chain.
  • Each pulley driving 10A, 11A can be mechanically coupled to the column steering 8 by means of a clutch, electromagnetic preference, activated depending on the selected operation.
  • the angular movement of the steering column 8 / driving pulley 10A, 11A to the engaged state is transmitted by the endless member 13 to the driven pulley 10B, 11B thus angularly moving the wheel 5A, 6 to which the driven pulley is coupled so as to make this last director.
  • This configuration of transmission is more particularly represented at the figure 2.
  • the clutch can still be formed, as illustrated in FIG. 5, by a hydraulic jack 21 or tire cooperating with a loaded mechanical lock 22 by spring and axially displaceable parallel to the axis longitudinal of the steering column 8 to make secured to a driving pulley either from the column of transmission-activated steering, i.e. one fixed structure in the inactivated state of the transmission.
  • the management is made up, in addition to the column of direction 8, angularly movable by the operation 7, such as a drawbar or a steering wheel, of a plate 23 integral in rotation with column 8.
  • This plate is disposed between the driving pulleys 10A, 11A of transmissions 10, 11 so that the faces of the driving pulleys extend substantially parallel to the faces of the plate 23.
  • This plate 23 is permanently coupled to a servo-control shown at 9 in the figures.
  • the driving pulleys 10A, 11A are each doubled a fixed plate 24, 25.
  • a mechanical lock 22 extends to each time, parallel to column 8, between pulley driving 10A or 11A and plate 23 integral in rotation with column 8.
  • This lock 22 loaded by spring 26 and displaceable by a jack 21, can pass from a first position to a second position.
  • a first position shown at the top left of Figure 5, one of the ends of the lock 22 provided with a roller 27 rolls on the plate 23 integral in rotation with the column 8, while that its other end, also provided with a roller 28, secures the driving pulley 11A and the doubling plate 24 the pulley so as to lock the rear wheel 6 connected to column 8 by this transmission in a position predetermined.
  • the end of the lock in the second position of the lock 22, corresponding to that shown at the bottom right of the Figure 5, can roll on the plate 25 doubling the pulley leading 10A, while the first end of the lock, provided with a roller 27, is housed at least partially in the plate 23 integral in rotation with the column 8 for make the driving pulley 10A and the column 8 integral with displacement so that the front wheel 5A and / or 5B, subjected to the action of the driving pulley 10A, is made director.
  • the machine has two transmissions and therefore two driving pulleys, it has also two locks with identical parts bear identical reference numbers.
  • the passage one of the locks from a first position to a second position operates in synchronism with the passage of the other lock from second position to first position.
  • the change from first position to second position takes place under the action of the jack 21 by extension of the rod of the latter, while the return of the second position at the first position is effected by means return such as springs 26 cooperating with a member support 29 affecting the shape of a radial finger to the body tubular lock.
  • This solution has the advantage to integrate, in the same whole, both the means clutch of different transmissions and means immobilizing the wheels in a determined position.
  • the plate 23, integral in rotation with column 8, comprises housings 30 at the ends 27 of the latches offset at 90 ° to allow synchronous operation. he it should be noted that a damping element is also provided 31 between cylinder rod 21 and end 28 of latch 22 for make the action of the cylinder rod progressive.
  • the operating member 7 of the direction of the machine constituted here by a drawbar, is mounted offset relative to the median longitudinal axis of the machine.
  • deactivation of a transmission and / or respectively the activation of a other transmission controlled by the control unit 12 for selecting the operating mode of the machine are slaved to the positioning of the steering wheel (s) 5A, 6 before deactivation.
  • the machine 1 is in a mode of said lateral operation in which the rear wheel 6 is fixedly positioned with its axis of rotation parallel to the longitudinal axis of the side members and the wheel before 5A is directing thanks to the activation of the transmission 10 between front wheel 5A and steering column 8 while the front wheel 5B is mad.
  • Steering wheels 5A or 6 are brought in manually in a predetermined position before deactivation of the transmission 10, 11 which connects them to the transmission by through management itself, especially by handling the operating member 7 of the steering, know the drawbar.
  • the operator by means of the drawbar 7, for example brings the wheel 5A to the predetermined position corresponding to a frontal displacement of the machine, that is to say in a position in which the axis of rotation of the wheel 5A extends perpendicular to the longitudinal axis of the spar. This position is then detected by the position sensor or automatically locked under spring action. Disabling transmission 10 and the activation of the transmission 11 are then rendered possible.
  • the wheels of the machine are kept immobilized in a predetermined position by means of at least one mechanical stop.
  • This mechanical stop can be constituted by the axially movable latch as mentioned above.
  • the mechanical stop can be offset and positioned at neighborhood of the wheels.
  • This lifting device 3 consists of an apron 14 fork carriers 15 moving up and down along of a mast 16 of a carriage 17 mast holder sliding mounted on the side members 2.
  • the base of the carriage 17 is provided 18 rotary synchronous motors with direction of rotation reversible each cooperating with a chain 19 whose ends are fixedly mounted along a beam 2.
  • the chain is kept at least partially wrapped around of the rotary motor member 18 to allow, during the rotational drive of the rotary 18 members, the movement of the carriage 17 mast carrier 16 along the longitudinal members 2 along an axis parallel to the longitudinal axis side members 2.

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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)
  • Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The lift stacker comprises a chassis carried by three wheels. One of the front (5A) and the rear wheels are connected to the vehicle steering (7) through a differential transmission. The transmission can be selectively activated by means of a control handle (12) selecting the rear or front wheels as steering wheels.

Description

La présente invention concerne un engin automoteur de manipulation de charges tel que gerbeur, de préférence électrique.The present invention relates to a self-propelled machine handling loads such as stacker, preferably electric.

Elle concerne plus particulièrement un engin de manipulation de charges du type comprenant un châssis constitué d'au moins deux longerons sensiblement parallèles surmontés d'un dispositif de levage et de manutention de charges et reliés à l'une de leurs extrémités par une structure logeant au moins partiellement des moyens de commande, de direction et de propulsion de l'engin, ce châssis étant porté par trois roues formant entre elles un triangle isocèle, les deux roues dites avant de l'engin étant disposées au voisinage des extrémités libres des longerons, la roue arrière, généralement motrice, s'étendant à l'aplomb de la structure.It relates more particularly to a handling loads of the type comprising a chassis consisting of at least two substantially parallel beams surmounted by a lifting and handling device charges and connected at one of their ends by a structure housing at least partially means of control, steering and propulsion of the machine, this chassis being carried by three wheels forming between them a isosceles triangle, the two so-called front wheels of the machine being arranged in the vicinity of the free ends of the side rails, the rear wheel, generally driving, extending directly above the structure.

Les engins de manipulation de charges du type précité sont bien connus à ceux versés dans cet art. Généralement, ces engins à conducteur accompagnant ou embarqué comportent une roue arrière motrice et directrice et deux roues avant dont l'une est folle tandis que l'autre est fixe et positionnée avec son axe de rotation perpendiculaire à l'axe longitudinal des longerons pour autoriser un déplacement frontal de l'engin. Lorsqu'il est nécessaire d'empiler des charges sur des piles disposées côte à côte, la manoeuvre d'un tel engin s'avère fastidieuse en raison des grands rayons de braquage. De telles manoeuvres deviennent impossibles lorsque l'engin se déplace dans une allée bordée de rayonnages et doit manipuler des charges de grande dimension, telles que des panneaux.Load handling devices of the above type are well known to those versed in this art. Generally, these vehicles with an accompanying or on-board driver include a rear driving and steering wheel and two front wheels including one is mad while the other is fixed and positioned with its axis of rotation perpendicular to the axis longitudinal beams to allow movement frontal of the machine. When it is necessary to stack loads on batteries arranged side by side, maneuvering such a machine is tedious due to the large turning radii. Such maneuvers become impossible when the machine moves in an aisle lined with shelving and must handle loads of large dimensions, such as panels.

On connaít par ailleurs un engin dans lequel l'une des roues avant est folle tandis que l'autre roue peut occuper au moins deux positions, l'une dans laquelle son axe de rotation est perpendiculaire à l'axe longitudinal du longeron pour autoriser un déplacement frontal de l'engin, l'autre dans laquelle son axe de rotation est parallèle à l'axe longitudinal du longeron pour autoriser un déplacement latéral de l'engin. A nouveau, toutefois, cette solution n'est pas satisfaisante en terme de maniabilité de l'engin. En outre, lorsque l'engin est dirigé au moyen d'un timon, du fait des normes qui interdisent le positionnement du timon sous la charge au moment d'une manoeuvre, l'orientation du timon est limitée à l'intérieur d'une plage angulaire étroite et empêche un maniement correct de l'enginWe also know a machine in which one of front wheels is crazy while the other wheel can occupy at least two positions, one in which its axis of rotation is perpendicular to the longitudinal axis of the side member to authorize a frontal movement of the machine, the other in which its axis of rotation is parallel to the longitudinal axis of the spar to allow lateral displacement of the machine. Again, however, this solution is not satisfactory in terms of maneuverability of the craft. In addition, when the object is steered by means of a drawbar, due to standards which prohibit positioning drawbar under load when maneuvering, the orientation of the drawbar is limited within a narrow angular range and prevents correct handling of the machine

On connaít également à travers le document EP-A-0.712.805 un engin de manipulation de charges dont les trois roues sont des roues directrices dont les orientations sont maintenues constamment dépendantes les unes des autres. En particulier l'angle pris par la roue arrière est maintenu constamment proportionnel aux angles pris par les roues avant. Il en résulte la nécessité de disposer d'une unité centrale et d'un certain nombre d'éléments de détection qui, après mesure des angles de roue avant, déterminent l'angle d'orientation devant être pris par la roue arrière pour conserver une orientation optimale des roues. Un tel dispositif de contrôle est particulièrement complexe et onéreux. L'implantation d'une électronique sur un tel engin génère un certain nombre d'inconvénients liés à l'environnement dans lequel évolue un tel engin. En effet, les vibrations, la poussière et l'exposition aux intempéries nécessitent des protections adaptées de l'électronique générant un surcoût de l'ensemble sans supprimer les risques de pannes.We also know through document EP-A-0.712.805 a load handling machine including three wheels are steered wheels whose orientations are kept constantly dependent on each other. In especially the angle taken by the rear wheel is maintained constantly proportional to the angles taken by the wheels before. This results in the need to have a unit central and a number of detection elements which, after measuring the front wheel angles, determine the orientation angle to be taken by the rear wheel to maintain an optimal orientation of the wheels. Such control device is particularly complex and expensive. The installation of electronics on such a machine generates a number of drawbacks related to the environment in which such a device operates. Indeed, vibrations, dust and exposure to bad weather requires suitable protection from the electronics generating an additional cost of the whole without eliminate the risk of breakdowns.

Le document FR-A-2.319.521 décrit quant à lui un chariot non automoteur à quatre roues, chaque roue étant reliée au chariot par un bras articulé dont l'articulation peut être immobilisée dans une position déterminée. Les roues avant sont par ailleurs reliées en permanence à la colonne de direction par des transmissions sans fin de telle sorte que les roues avant sont des roues constamment directrices. Les roues arrière peuvent être rendues directrices par l'intermédiaire de transmissions débrayables couplées aux transmissions des roues avant. On dispose ainsi d'un chariot équipé soit de deux roues directrices, soit de quatre roues directrices. Le fait de disposer de quatre roues dont deux sont maintenues directrices en permanence ne permet pas d'obtenir une maniabilité de l'ensemble sans avoir à multiplier le nombre de transmissions et de dispositions parallèles telles que des bras articulés entre roues et châssis. Il en résulte à nouveau une construction particulièrement complexe. Par ailleurs, les roues, lorsqu'elles ne sont pas directrices, sont des roues folles. Une telle disposition ne peut pas être étendue à des engins de manipulation de charges. En effet, le document précité s'applique à un chariot non automoteur équipé de bras permettant de faire varier le polygone de sustentation du chariot afin d'éviter son renversement. Le maniement d'un tel chariot ne peut être comparé à celui d'un engin de manipulation de charges automoteur à trois roues. En conséquence, ce document appartient uniquement à l'arrière-plan technologique.The document FR-A-2,319,521 describes a carriage not self-propelled with four wheels, each wheel being connected to the trolley by an articulated arm whose articulation can be immobilized in a determined position. Front wheels are also permanently connected to the column of direction by endless transmissions so that the front wheels are constantly steer wheels. The rear wheels can be steered by via disengageable transmissions coupled to front wheel transmissions. We thus have a trolley fitted with either two steered wheels or four-wheel steering. Having four wheels, two of which are permanently steered does not make it possible to obtain maneuverability of the assembly without have to multiply the number of transmissions and parallel arrangements such as arms hinged between wheels and chassis. This again results in a construction particularly complex. Furthermore, the wheels, when not steered, are wheels crazy. Such a provision cannot be extended to load handling devices. Indeed, the above document applies to a non-self-propelled cart equipped with arms allowing to vary the polygon of lift the truck to prevent it from overturning. The handling such a cart cannot be compared to that a self-propelled three-way load handling machine wheels. Consequently, this document belongs only to the technological background.

Un but de la présente invention est de proposer un engin automoteur de manipulation de charges dont la conception permet de manipuler des charges de grande dimension, y compris à l'intérieur d'allées bordées de rayonnages, cet engin présentant un rayon de braquage court, indépendamment de son mode de déplacement latéral ou frontal.An object of the present invention is to provide a machine self-propelled load handling machine whose design allows handling of large loads, including included inside aisles lined with shelving, this machine with a short turning radius, independently of its lateral or frontal movement mode.

A cet effet, l'invention a pour objet un engin automoteur de manipulation de charges, tel que gerbeur, de préférence électrique, du type comprenant un châssis constitué d'au moins deux longerons sensiblement parallèles surmontés d'un dispositif de levage et de manutention de charges et reliés à l'une de leurs extrémités par une structure logeant au moins partiellement des moyens de commande, de direction et de propulsion de l'engin, ce châssis étant porté par trois roues formant entre elles un triangle isocèle, les deux roues dites avant de l'engin étant disposées au voisinage des extrémités libres des longerons, la roue arrière, généralement motrice, s'étendant à l'aplomb de la structure, caractérisé en ce qu'au moins l'une des roues avant et la roue arrière de l'engin sont reliées à la direction de l'engin par l'intermédiaire d'une transmission différenciée, lesdites transmissions étant sélectivement activables par l'intermédiaire d'un organe de commande sélectionnant un mode de fonctionnement de l'engin pour rendre la roue arrière ou respectivement la ou les roues avant directrices, ces mêmes roues étant, à l'état inactivé de leur transmission les reliant à la direction de l'engin, disposées dans une position d'orientation prédéterminée constante pour coopérer à la manoeuvre de l'engin déplaçable suivant au moins deux modes de fonctionnement, l'un dit à déplacement frontal, l'autre dit à déplacement latéral.To this end, the invention relates to a self-propelled machine handling loads, such as stacker, preferably electric, of the type comprising a chassis consisting of at least at least two substantially parallel beams surmounted by a device for lifting and handling loads and connected at one of their ends by a structure housing at at least partially control, steering and of propulsion of the machine, this chassis being carried by three wheels forming an isosceles triangle between them, the two so-called front wheels of the machine being arranged in the vicinity free ends of the side members, the rear wheel, generally motive, extending directly above the structure, characterized in that at least one of the wheels front and rear wheel of the craft are connected to the direction of the machine via a transmission differentiated, said transmissions being selectively can be activated via a control unit selecting a mode of operation of the machine for return the rear wheel or respectively the wheel or wheels front steering, these same wheels being, in the inactivated state of their transmission connecting them to the direction of the machine, arranged in a predetermined orientation position constant to cooperate in the operation of the machine movable according to at least two operating modes, one says displacement, the other says displacement lateral.

La possibilité de rendre tour à tour la roue arrière et au moins l'une des roues avant de l'engin directrices en maintenant au moins l'une des autres roues dans une orientation prédéterminée constante, c'est-à-dire qui ne varie pas en fonction de l'orientation prise par la ou les roue(s) directrice(s) sans avoir recours à une électronique lourde permet de diriger l'engin de manière aisée indépendamment du mode de déplacement sélectionné.The possibility of turning the rear wheel in turn and minus one of the front wheels of the steering gear in now at least one of the other wheels in a constant predetermined orientation, i.e. which does not not vary depending on the orientation taken by the steering wheel (s) without using electronics heavy makes it easy to steer the machine regardless of the selected travel mode.

Selon une forme de réalisation préférée de l'invention, dans un premier mode de fonctionnement de l'engin correspondant à l'activation de la transmission entre roue arrière et direction, l'axe de rotation d'au moins l'une des roues avant est disposé perpendiculaire à l'axe longitudinal des longerons pour autoriser un déplacement frontal de l'engin au moyen de la roue arrière directrice et en ce que, dans un second mode de fonctionnement de l'engin correspondant à l'activation de la transmission entre une roue avant et la direction, l'axe de rotation de la roue arrière de l'engin est disposé parallèle à l'axe longitudinal des longerons pour autoriser un déplacement latéral de l'engin au moyen de la roue avant directrice.According to a preferred embodiment of the invention, in a first mode of operation of the machine corresponding to the activation of the transmission between wheel rear and direction, the axis of rotation of at least one front wheels is arranged perpendicular to the axis longitudinal beams to allow movement front of the vehicle by means of the rear steering wheel and in that, in a second mode of operation of the gear corresponding to the activation of the transmission between a front wheel and the steering, the axis of rotation of the rear wheel of the machine is arranged parallel to the axis longitudinal beams to allow movement lateral of the machine by means of the front steering wheel.

L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en perspective de
  • dessous d'un engin de manipulation de charges de type gerbeur conforme à l'invention dans un mode de fonctionnement correspondant à un déplacement latéral de l'engin ;
  • la figure 2 représente une vue en perspective de l'engin de la figure 1, le chariot porte-mât ayant été enlevé ;
  • la figure 3 représente une vue en perspective de dessous de l'engin de la figure 1, le détail de la manoeuvre du chariot porte-mât ayant été représenté ;
  • la figure 4 représente une vue en perspective de dessus de l'engin de la figure 1 et
  • la figure 5 représente une vue partielle en coupe d'un dispositif d'embrayage apte à coupler chaque poulie menante à la colonne de direction.
    • The invention will be clearly understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:
  • Figure 1 shows a perspective view of
  • below a stacker type load handling device according to the invention in an operating mode corresponding to a lateral movement of the device;
  • 2 shows a perspective view of the machine of Figure 1, the mast carriage having been removed;
  • 3 shows a perspective view from below of the machine of Figure 1, the detail of the operation of the mast carriage having been shown;
  • FIG. 4 represents a perspective view from above of the machine of FIG. 1 and
  • FIG. 5 represents a partial sectional view of a clutch device able to couple each driving pulley to the steering column.

    • L'engin de manipulation de charges, objet de l'invention, encore appelé gerbeur ou chariot à fourche, comprend un châssis constitué d'au moins deux longerons 2 sensiblement parallèles surmontés d'un dispositif 3 de levage et de manutention de charges. Les deux longerons 2 sont généralement constitués de profilés creux métalliques. Ces longerons 2 sont reliés à l'une de leurs extrémités par une structure 4 logeant au moins partiellement les moyens de commande, de direction et de propulsion 7, 8, 9 de l'engin. L'engin est de préférence à propulsion électrique. La structure 4 de l'engin peut affecter un grand nombre de formes. Dans les exemples représentés, elle est constituée par un caisson, l'engin étant du type à conducteur accompagnant. The load handling device, object of the invention, also called stacker or forklift, includes a chassis consisting of at least two beams 2 substantially parallel surmounted by a device 3 for lifting and handling of loads. The two beams 2 are generally made up of hollow metal profiles. These longitudinal members 2 are connected at one of their ends by a structure 4 at least partially housing the means of control, steering and propulsion 7, 8, 9 of the machine. The machine is preferably electrically propelled. The 4 structure of the craft can affect a lot of forms. In the examples shown, it is made up by a box, the machine being of the conductor type accompanying.

    Dans un autre mode de réalisation de l'invention, non représenté, la structure 4 peut affecter la forme d'un caisson surmonté d'une cabine, l'engin de manipulation étant alors du type à conducteur embarqué.In another embodiment of the invention, not shown, structure 4 can affect the shape of a caisson surmounted by a cabin, the handling machine then being of the on-board driver type.

    Les moyens de commande et de propulsion de l'engin ne seront pas décrits plus en détail ci-après car ils sont bien connus à ceux versés dans cet art.The means of control and propulsion of the machine do not will not be described in more detail below as they are well known to those versed in this art.

    Pour la commande en particulier du dispositif 3 de levage et de manutention de charges, la structure comporte sur sa face du dessus trois manettes 20 gérant les fonctions hydrauliques et permettant notamment le déplacement monte et baisse du dispositif de levage, la rétraction du mât 16 de levage qui sera décrite ci-après et l'inclinaison du tablier 14 qui sera également décrit ci-après.For controlling in particular the lifting device 3 and load handling, the structure has on its face of the top three controllers 20 managing the functions hydraulic and allowing in particular the displacement goes up and lowering of the lifting device, retraction of the mast 16 lifting which will be described below and the inclination of the apron 14 which will also be described below.

    Le châssis de l'engin 1 est porté par trois roues 5A, 5B, 6 formant entre elles un triangle isocèle. Les deux roues 5A, 5B dites avant de l'engin sont disposées au voisinage des extrémités libres des longerons 2 et permettent l'appui des longerons 2 au sol tandis que la roue arrière 6, généralement motrice, s'étend à l'aplomb de la structure 4.The chassis of the machine 1 is carried by three wheels 5A, 5B, 6 forming between them an isosceles triangle. The two 5A wheels, 5B said before the machine are arranged in the vicinity of free ends of the side members 2 and allow the support of side rails 2 on the ground while the rear wheel 6, generally motive, extends vertically above structure 4.

    De manière caractéristique à l'invention, au moins l'une 5A des roues avant 5A, 5B et la roue arrière 6 de l'engin 1 sont reliées à la direction 7, 8, 9 de l'engin par l'intermédiaire d'une transmission 10, 11 différenciée, plus particulièrement représentée à la figure 2. Ces transmissions 10, 11 sont sélectivement activables par l'intermédiaire d'un organe de commande 12, tel qu'un inverseur constitué d'un poussoir électrique, sélectionnant un mode de fonctionnement de l'engin 1 pour rendre la roue arrière 6 ou respectivement la ou les roues avant 5A, 5B directrices. Ces mêmes roues sont, à l'état inactivé de leur transmission les reliant à la direction 7, 8, 9 de l'engin, disposées dans une position prédéterminée pour coopérer à la manoeuvre de l'engin déplaçable suivant au moins deux modes de fonctionnement, l'un dit à déplacement frontal, correspondant à la flèche F dans la figure 1, l'autre dit à déplacement latéral, correspondant à la flèche L dans la figure 1.Typically according to the invention, at least one 5A front wheels 5A, 5B and the rear wheel 6 of the machine 1 are connected to the direction 7, 8, 9 of the machine by via a differentiated transmission 10, 11, more particularly shown in Figure 2. These transmissions 10, 11 can be selectively activated by through a control member 12, such as a reverser consisting of an electric pushbutton, selecting a mode of operation of the machine 1 to make the wheel rear 6 or respectively the front wheel or wheels 5A, 5B guidelines. These same wheels are, in the inactivated state of their transmission connecting them to the direction 7, 8, 9 of the craft, arranged in a predetermined position for cooperate in the maneuvering of the next movable machine at minus two operating modes, one says displacement front, corresponding to arrow F in FIG. 1, the other says lateral displacement, corresponding to the arrow L in figure 1.

    Ainsi, dans un premier mode de fonctionnement de l'engin 1 correspondant à l'activation de la transmission 11 entre roue arrière 6 et direction 7, 8, 9, l'axe de rotation d'au moins l'une 5A des roues avant 5A, 5B de l'engin est disposé perpendiculaire à l'axe longitudinal des longerons 2 pour autoriser un déplacement frontal de l'engin au moyen de la roue arrière 6 directrice. Dans un second mode de fonctionnement de l'engin 1 correspondant à l'activation de la transmission 10 entre une roue avant 5A et direction 7, 8, 9, représentées aux figures 1 et 2, l'axe de rotation de la roue arrière 6 de l'engin 1 est disposé parallèle à l'axe longitudinal des longerons 2 pour autoriser un déplacement latéral de l'engin 1 au moyen de la roue avant 5A directrice.Thus, in a first mode of operation of the machine 1 corresponding to the activation of transmission 11 between rear wheel 6 and steering 7, 8, 9, the axis of rotation of minus one 5A of the front wheels 5A, 5B of the machine is arranged perpendicular to the longitudinal axis of the side members 2 to authorize a frontal movement of the machine by means of the rear wheel 6 steering. In a second mode of operation of machine 1 corresponding to the activation of the transmission 10 between a front wheel 5A and direction 7, 8, 9, shown in Figures 1 and 2, the axis of rotation of the rear wheel 6 of the machine 1 is arranged parallel to the longitudinal axis of the side members 2 to allow a lateral movement of machine 1 by means of the front wheel 5A director.

    Dans le cas d'un engin de manipulation de charges dans lequel chaque roue avant 5A, 5B de l'engin 1 est reliée à la direction 7, 8, 9 de l'engin par une transmission 10 sélectivement activable, ces transmissions 10 entre roue avant 5A, 5B et direction de l'engin fonctionnent en synchronisme pour permettre un déplacement parallèle et simultané des roues avant 5A, 5B.In the case of a load handling device in which each front wheel 5A, 5B of the machine 1 is connected to the direction 7, 8, 9 of the machine by a transmission 10 selectively activable, these transmissions 10 between wheel before 5A, 5B and direction of the machine operate in synchronism to allow parallel movement and simultaneous front wheels 5A, 5B.

    Dans un autre mode de réalisation de l'engin 1 de manipulation de charges dans lequel une roue avant 5B de l'engin n'est pas reliée à la direction 7, 8, 9 par une transmission 10, cette roue avant 5B est une roue folle. Ce second mode de réalisation est représenté aux figures.In another embodiment of the machine 1 of load handling in which a front wheel 5B of the machine is not connected to the direction 7, 8, 9 by a transmission 10, this front wheel 5B is a crazy wheel. This second embodiment is shown in the figures.

    La direction de l'engin est quant à elle constituée d'une colonne de direction 8 déplaçable angulairement par l'intermédiaire d'un organe de manoeuvre 7 tel qu'un timon ou un volant. Cette direction peut être assistée au moyen d'une servocommande représentée en 9 aux figures pour faciliter le maniement de la direction. Chaque transmission 10, 11 est quant à elle constituée d'une poulie menante 10A, 11A et d'une poulie menée 10B, 11B reliées entre elles par un organe sans fin 13 tel qu'une chaíne. Chaque poulie menante 10A, 11A est accouplable mécaniquement à la colonne de direction 8 par l'intermédiaire d'un embrayage, de préférence électromagnétique, activé en fonction du mode de fonctionnement sélectionné. Le mouvement angulaire de l'ensemble colonne de direction 8/poulie menante 10A, 11A à l'état embrayé est transmis par l'organe sans fin 13 à la poulie menée 10B, 11B déplaçant ainsi angulairement la roue 5A, 6 à laquelle la poulie menée est couplée de manière à rendre cette dernière directrice. Cette configuration de transmission est plus particulièrement représentée à la figure 2. L'embrayage peut encore être constitué, comme l'illustre la figure 5, par un vérin 21 hydraulique ou pneumatique coopérant avec un verrou 22 mécanique chargé par ressort et déplaçable axialement parallèlement à l'axe longitudinal de la colonne de direction 8 pour rendre solidaire une poulie menante soit de la colonne de direction à l'état activé de la transmission, soit d'une structure fixe à l'état inactivé de la transmission. Dans ce cas, la direction est constituée, outre la colonne de direction 8, déplaçable angulairement par l'organe de manoeuvre 7, tel qu'un timon ou un volant, d'un plateau 23 solidaire en rotation de la colonne 8. Ce plateau est disposé entre les poulies menantes 10A, 11A des transmissions 10, 11 de telle sorte que les faces des poulies menantes s'étendent sensiblement parallèlement aux faces du plateau 23. Ce plateau 23 est couplé en permanence à une servocommande représentée en 9 aux figures. Les poulies menantes 10A, 11A sont elles-mêmes doublées chacune d'un plateau fixe 24, 25. Un verrou 22 mécanique s'étend à chaque fois, parallèlement à la colonne 8, entre poulie menante 10A ou 11A et plateau 23 solidaire en rotation de la colonne 8. Ce verrou 22, chargé par ressort 26 et déplaçable par un vérin 21, peut passer d'une première position à une seconde position. Dans la première position, représentée en haut à gauche de la figure 5, une des extrémités du verrou 22 munie d'un galet 27 roule sur le plateau 23 solidaire en rotation de la colonne 8, tandis que son autre extrémité, également munie d'un galet 28, solidarise la poulie menante 11A et le plateau 24 doublant la poulie de manière à verrouiller la roue 6 arrière reliée à la colonne 8 par cette transmission dans une position prédéterminée. Dans la seconde position du verrou 22, correspondant à celle représentée en bas à droite de la figure 5, l'extrémité du verrou, également munie du galet 28, peut rouler sur le plateau 25 doublant la poulie menante 10A, tandis que la première extrémité du verrou, munie d'un galet 27, est logée au moins partiellement dans le plateau 23 solidaire en rotation de la colonne 8 pour rendre la poulie menante 10A et la colonne 8 solidaires en déplacement de telle sorte que la roue avant 5A et/ou 5B, soumise à l'action de la poulie menante 10A, est rendue directrice. Bien évidemment, comme l'engin dispose de deux transmissions et donc de deux poulies menantes, il dispose également de deux verrous dont les parties identiques portent des références numériques identiques. Le passage d'un des verrous d'une première position à une seconde position s'opère en synchronisme avec le passage de l'autre verrou de la seconde position à la première position. Le passage de la première position à la seconde position s'effectue sous l'action du vérin 21 par extension de la tige de ce dernier, tandis que le retour de la seconde position à la première position s'effectue par des moyens de rappel tels que des ressorts 26 coopérant avec un organe d'appui 29 affectant la forme d'un doigt radial au corps tubulaire du verrou. Cette solution présente l'avantage d'intégrer, dans un même ensemble, à la fois les moyens d'embrayage des différentes transmissions et les moyens d'immobilisation des roues dans une position déterminée. Le plateau 23, solidaire en rotation de la colonne 8, comporte des logements 30 des extrémités 27 des verrous décalés à 90° pour permettre un fonctionnement en synchronisme. Il est à noter qu'il est prévu en outre un élément amortisseur 31 entre tige du vérin 21 et extrémité 28 du verrou 22 pour rendre progressive l'action de la tige de vérin.The direction of the machine is made up of a steering column 8 angularly movable by via an operating member 7 such as a drawbar or a steering wheel. This direction can be assisted by means of a servo-control shown in 9 in the figures for facilitate management handling. Each transmission 10, 11 consists of a driving pulley 10A, 11A and a driven pulley 10B, 11B interconnected by an endless organ 13 such as a chain. Each pulley driving 10A, 11A can be mechanically coupled to the column steering 8 by means of a clutch, electromagnetic preference, activated depending on the selected operation. The angular movement of the steering column 8 / driving pulley 10A, 11A to the engaged state is transmitted by the endless member 13 to the driven pulley 10B, 11B thus angularly moving the wheel 5A, 6 to which the driven pulley is coupled so as to make this last director. This configuration of transmission is more particularly represented at the figure 2. The clutch can still be formed, as illustrated in FIG. 5, by a hydraulic jack 21 or tire cooperating with a loaded mechanical lock 22 by spring and axially displaceable parallel to the axis longitudinal of the steering column 8 to make secured to a driving pulley either from the column of transmission-activated steering, i.e. one fixed structure in the inactivated state of the transmission. In in this case, the management is made up, in addition to the column of direction 8, angularly movable by the operation 7, such as a drawbar or a steering wheel, of a plate 23 integral in rotation with column 8. This plate is disposed between the driving pulleys 10A, 11A of transmissions 10, 11 so that the faces of the driving pulleys extend substantially parallel to the faces of the plate 23. This plate 23 is permanently coupled to a servo-control shown at 9 in the figures. The driving pulleys 10A, 11A are each doubled a fixed plate 24, 25. A mechanical lock 22 extends to each time, parallel to column 8, between pulley driving 10A or 11A and plate 23 integral in rotation with column 8. This lock 22, loaded by spring 26 and displaceable by a jack 21, can pass from a first position to a second position. In the first position, shown at the top left of Figure 5, one of the ends of the lock 22 provided with a roller 27 rolls on the plate 23 integral in rotation with the column 8, while that its other end, also provided with a roller 28, secures the driving pulley 11A and the doubling plate 24 the pulley so as to lock the rear wheel 6 connected to column 8 by this transmission in a position predetermined. In the second position of the lock 22, corresponding to that shown at the bottom right of the Figure 5, the end of the lock, also fitted with the roller 28, can roll on the plate 25 doubling the pulley leading 10A, while the first end of the lock, provided with a roller 27, is housed at least partially in the plate 23 integral in rotation with the column 8 for make the driving pulley 10A and the column 8 integral with displacement so that the front wheel 5A and / or 5B, subjected to the action of the driving pulley 10A, is made director. Obviously, as the machine has two transmissions and therefore two driving pulleys, it has also two locks with identical parts bear identical reference numbers. The passage one of the locks from a first position to a second position operates in synchronism with the passage of the other lock from second position to first position. The change from first position to second position takes place under the action of the jack 21 by extension of the rod of the latter, while the return of the second position at the first position is effected by means return such as springs 26 cooperating with a member support 29 affecting the shape of a radial finger to the body tubular lock. This solution has the advantage to integrate, in the same whole, both the means clutch of different transmissions and means immobilizing the wheels in a determined position. The plate 23, integral in rotation with column 8, comprises housings 30 at the ends 27 of the latches offset at 90 ° to allow synchronous operation. he it should be noted that a damping element is also provided 31 between cylinder rod 21 and end 28 of latch 22 for make the action of the cylinder rod progressive.

    Pour réduire l'encombrement dans le sens de la longueur de l'engin et faciliter la manoeuvre de ce dernier, notamment en permettant à l'opérateur de repérer visuellement la position des roues, en particulier des roues directrices, l'organe de manoeuvre 7 de la direction de l'engin, constitué ici par un timon, est monté déporté par rapport à l'axe longitudinal médian de l'engin.To reduce the overall lengthwise dimension and facilitate the maneuver of the latter, in particular by allowing the operator to visually locate the position of the wheels, in particular of the steered wheels, the operating member 7 of the direction of the machine, constituted here by a drawbar, is mounted offset relative to the median longitudinal axis of the machine.

    Pour garantir un fonctionnement optimal dans l'un quelconque des modes de fonctionnement, la désactivation d'une transmission et/ou respectivement l'activation d'une autre transmission commandées par l'organe de commande 12 de sélection du mode de fonctionnement de l'engin sont asservies au positionnement de la ou des roues directrices 5A, 6 avant désactivation. Ainsi, dans l'exemple représenté aux figures 1 et 2, l'engin 1 est dans un mode de fonctionnement dit latéral dans lequel la roue arrière 6 est positionnée de manière fixe avec son axe de rotation parallèle à l'axe longitudinal des longerons et la roue avant 5A est directrice grâce à l'activation de la transmission 10 entre roue avant 5A et colonne de direction 8 tandis que la roue avant 5B est folle. La commutation de ce mode de fonctionnement à déplacement latéral vers un mode de fonctionnement à déplacement frontal de l'engin nécessite de positionner la roue avant 5A de manière telle que son axe de rotation ou axe de roulement s'étende perpendiculairement à l'axe longitudinal du longeron. Une fois cette position occupée, la désactivation de la transmission 10 et par suite l'activation de la transmission 11 peuvent être commandées. Ainsi, la désactivation de la transmission 10 et l'activation de la transmission 11 ne seront rendues possible que lorsque la roue 5A occupera la position prédéterminée mentionnée ci-dessus. Pour asservir la désactivation ou respectivement l'activation des transmissions à cette position de la roue 5A ou de manière similaire à la roue 6, il peut être prévu un organe de détection de position de roue, tel qu'un capteur de position des roues 5A et 6. Il est à noter que, dans l'exemple décrit ci-dessus d'un verrou mécanique, il n'est pas nécessaire de disposer de capteur de position. En effet, le passage d'une position à une autre position du verrou ne peut s'effectuer que lorsque les roues sont dans une position déterminée.To guarantee optimal operation in one any of the operating modes, deactivation of a transmission and / or respectively the activation of a other transmission controlled by the control unit 12 for selecting the operating mode of the machine are slaved to the positioning of the steering wheel (s) 5A, 6 before deactivation. So in the example shown in Figures 1 and 2, the machine 1 is in a mode of said lateral operation in which the rear wheel 6 is fixedly positioned with its axis of rotation parallel to the longitudinal axis of the side members and the wheel before 5A is directing thanks to the activation of the transmission 10 between front wheel 5A and steering column 8 while the front wheel 5B is mad. The switching of this operating mode with lateral displacement towards a operating mode with front displacement of the machine requires positioning the front wheel 5A in such a way that its axis of rotation or axis of rotation extends perpendicular to the longitudinal axis of the beam. A once this position is occupied, deactivation of the transmission 10 and consequently the activation of the transmission 11 can be ordered. So the deactivation of transmission 10 and activation of transmission 11 will only be made possible when the wheel 5A will occupy the predetermined position mentioned above. To slave deactivation or respectively activating the transmissions at this wheel position 5A or similarly to wheel 6, it can be provided a wheel position detection member, such as a wheel position sensor 5A and 6. It should be noted that, in the example described above of a mechanical lock, it it is not necessary to have a position sensor. In effect, the passage from one position to another position of the lock can only be carried out when the wheels are in a determined position.

    Les roues directrices 5A ou 6 sont amenées manuellement dans une position prédéterminée avant désactivation de la transmission 10, 11 qui les relie à la transmission par l'intermédiaire de la direction elle-même, en particulier par maniement de l'organe de manoeuvre 7 de la direction, à savoir le timon. Ainsi, l'opérateur, au moyen du timon 7, amène par exemple la roue 5A dans la position prédéterminée correspondant à un déplacement frontal de l'engin, c'est-à-dire dans une position dans laquelle l'axe de rotation de la roue 5A s'étend perpendiculairement à l'axe longitudinal du longeron. Cette position est alors détectée par le capteur de position ou automatiquement verrouillée sous l'action de ressort. La désactivation de la transmission 10 et l'activation de la transmission 11 sont alors rendues possibles.Steering wheels 5A or 6 are brought in manually in a predetermined position before deactivation of the transmission 10, 11 which connects them to the transmission by through management itself, especially by handling the operating member 7 of the steering, know the drawbar. Thus, the operator, by means of the drawbar 7, for example brings the wheel 5A to the predetermined position corresponding to a frontal displacement of the machine, that is to say in a position in which the axis of rotation of the wheel 5A extends perpendicular to the longitudinal axis of the spar. This position is then detected by the position sensor or automatically locked under spring action. Disabling transmission 10 and the activation of the transmission 11 are then rendered possible.

    Pour parfaire le fonctionnement, les roues de l'engin, à l'état inactivé de leur transmission les reliant à la direction 7, 8, 9 de l'engin, sont maintenues immobilisées dans une position prédéterminée au moyen d'au moins une butée mécanique. Cette butée mécanique peut être constituée par le verrou déplaçable axialement comme mentionné ci-dessus. Dans le cas d'un autre dispositif d'embrayage, la butée mécanique peut être déportée et positionnée au voisinage des roues.To perfect the operation, the wheels of the machine, the inactivated state of their transmission connecting them to the direction 7, 8, 9 of the machine, are kept immobilized in a predetermined position by means of at least one mechanical stop. This mechanical stop can be constituted by the axially movable latch as mentioned above. In the case of another clutch device, the mechanical stop can be offset and positioned at neighborhood of the wheels.

    De la description ci-dessus, il en résulte un fonctionnement particulièrement simple de l'engin et une commutation d'un mode de fonctionnement à un autre qui peut s'effectuer en toute sécurité.From the above description, this results in a particularly simple operation of the machine and a switching from one operating mode to another which can be done safely.

    L'engin 1, comme mentionné ci-dessus, comporte encore un dispositif 3 de levage et de manipulation de charges. Ce dispositif 3 de levage est constitué d'un tablier 14 porte-fourches 15 animé d'un mouvement de monte et baisse le long d'un mât 16 d'un chariot 17 porte-mât monté à coulissement sur les longerons 2. La base du chariot 17 est munie d'organes 18 rotatifs moteurs synchrones à sens de rotation inversible coopérant chacun avec une chaíne 19 dont les extrémités sont montées fixes le long d'un longeron 2. La chaíne est maintenue au moins partiellement enroulée autour de l'organe moteur rotatif 18 pour permettre, lors de l'entraínement en rotation des organes 18 rotatifs, le déplacement du chariot 17 porte-mât 16 le long des longerons 2 suivant un axe parallèle à l'axe longitudinal des longerons 2. Ainsi, il peut occuper une position dans laquelle il s'étend à l'aplomb de l'extrémité des longerons 2 comme l'illustre la figure 3 ou, au contraire, venir s'adosser contre la paroi frontale de la structure 4 comme l'illustre la figure 1. L'utilisation de chaínes permet d'adapter un tel dispositif de déplacement à des configurations variables de châssis. Il suffit en effet de découper la chaíne à la longueur voulue et de l'enrouler ensuite autour des organes 18 rotatifs. En outre, une telle solution simplifie la maintenance du dispositif, limite les stocks puisque les chaínes peuvent être enroulées sur une bobine comparativement à des solutions classiques type crémaillère.Machine 1, as mentioned above, still has a device 3 for lifting and handling loads. This lifting device 3 consists of an apron 14 fork carriers 15 moving up and down along of a mast 16 of a carriage 17 mast holder sliding mounted on the side members 2. The base of the carriage 17 is provided 18 rotary synchronous motors with direction of rotation reversible each cooperating with a chain 19 whose ends are fixedly mounted along a beam 2. The chain is kept at least partially wrapped around of the rotary motor member 18 to allow, during the rotational drive of the rotary 18 members, the movement of the carriage 17 mast carrier 16 along the longitudinal members 2 along an axis parallel to the longitudinal axis side members 2. Thus, it can occupy a position in which it extends directly above the end of the side members 2 as illustrated in Figure 3 or, on the contrary, come lean against the front wall of structure 4 as illustrated in figure 1. The use of chains allows to adapt such a displacement device to variable chassis configurations. It suffices to cut the chain to the desired length and roll it up then around the rotary members 18. Furthermore, such solution simplifies device maintenance, limits stocks since the chains can be wound on a coil compared to conventional standard solutions rack.

    Claims (11)

    Engin (1) automoteur de manipulation de charges, tel que gerbeur, de préférence électrique, du type comprenant un châssis constitué d'au moins deux longerons (2) sensiblement parallèles surmontés d'un dispositif (3) de levage et de manutention de charges et reliés à l'une de leurs extrémités par une structure (4) logeant au moins partiellement des moyens de commande, de direction (7, 8, 9) et de propulsion de l'engin, ce châssis étant porté par trois roues (5A, 5B, 6) formant entre elles un triangle isocèle, les deux roues (5A, 5B) dites avant de l'engin étant disposées au voisinage des extrémités libres des longerons (2), la roue arrière (6), généralement motrice, s'étendant à l'aplomb de la structure (4),
    caractérisé en ce qu'au moins l'une (5A) des roues avant (5A, 5B) et la roue arrière (6) de l'engin (1) sont reliées à la direction (7, 8, 9) de l'engin par l'intermédiaire d'une transmission (10, 11) différenciée, lesdites transmissions (10, 11) étant sélectivement activables par l'intermédiaire d'un organe de commande (12) sélectionnant un mode de fonctionnement de l'engin (1) pour rendre la roue arrière (6) ou respectivement la ou les roues avant (5A, 5B) directrices, ces mêmes roues (5A, 6) étant, à l'état inactivé de leur transmission (10, 11) les reliant à la direction (7, 8, 9) de l'engin, disposées dans une position d'orientation prédéterminée constante pour coopérer à la manoeuvre de l'engin (1) déplaçable suivant au moins deux modes de fonctionnement, l'un dit à déplacement frontal, l'autre dit à déplacement latéral.    Self-propelled machine for handling loads, such as a stacker, preferably electric, of the type comprising a chassis consisting of at least two substantially parallel beams (2) surmounted by a device (3) for lifting and handling loads and connected at one of their ends by a structure (4) at least partially housing control, steering (7, 8, 9) and propulsion means of the machine, this chassis being carried by three wheels (5A , 5B, 6) forming between them an isosceles triangle, the two wheels (5A, 5B) called before the machine being arranged in the vicinity of the free ends of the side members (2), the rear wheel (6), generally driving, s 'extending vertically above the structure (4),
    characterized in that at least one (5A) of the front wheels (5A, 5B) and the rear wheel (6) of the machine (1) are connected to the direction (7, 8, 9) of the machine by means of a differentiated transmission (10, 11), said transmissions (10, 11) being selectively activatable by means of a control member (12) selecting an operating mode of the machine (1 ) to make the rear wheel (6) or respectively the front wheel or wheels (5A, 5B) steered, these same wheels (5A, 6) being, in the inactivated state of their transmission (10, 11) connecting them to the direction (7, 8, 9) of the machine, disposed in a constant predetermined orientation position to cooperate in the maneuver of the machine (1) movable according to at least two modes of operation, one said to be frontal displacement , the other says lateral displacement.         Engin (1) de manipulation de charges selon la revendication 1,
    caractérisé en ce que, dans un premier mode de fonctionnement de l'engin (1) correspondant à l'activation de la transmission (11) entre roue arrière (6) et direction (7, 8, 9), l'axe de rotation d'au moins l'une (5A) des roues avant (5A, 5B) est disposé perpendiculaire à l'axe longitudinal des longerons (2) pour autoriser un déplacement frontal de l'engin au moyen de la roue arrière (6) directrice et en ce que, dans un second mode de fonctionnement de l'engin (1) correspondant à l'activation de la transmission (10) entre une roue avant (5A) et la direction (7, 8, 9), l'axe de rotation de la roue arrière (6) de l'engin (1) est disposé parallèle à l'axe longitudinal des longerons (2) pour autoriser un déplacement latéral de l'engin (1) au moyen de la roue avant (5A) directrice.    Load handling device (1) according to claim 1,
    characterized in that , in a first operating mode of the machine (1) corresponding to the activation of the transmission (11) between the rear wheel (6) and the direction (7, 8, 9), the axis of rotation at least one (5A) of the front wheels (5A, 5B) is arranged perpendicular to the longitudinal axis of the side members (2) to allow a front movement of the machine by means of the rear wheel (6) and in that , in a second operating mode of the machine (1) corresponding to the activation of the transmission (10) between a front wheel (5A) and the direction (7, 8, 9), the axis of rotation of the rear wheel (6) of the vehicle (1) is arranged parallel to the longitudinal axis of the side members (2) to allow lateral movement of the vehicle (1) by means of the front wheel (5A) director.         Engin (1) de manipulation de charges selon l'une des revendications 1 et 2, dans lequel chaque roue avant (5A, 5B) de l'engin (1) est reliée à la direction (7, 8, 9) de l'engin par une transmission (10) sélectivement activable,
    caractérisé en ce que lesdites transmissions (10) entre roue avant (5A, 5B) et direction de l'engin fonctionnent, à l'état activé, en synchronisme pour permettre un déplacement parallèle et simultané des roues avant (5A, 5B).    Load handling machine (1) according to one of claims 1 and 2, wherein each front wheel (5A, 5B) of the machine (1) is connected to the direction (7, 8, 9) of the machine by a selectively activatable transmission (10),
    characterized in that said transmissions (10) between the front wheel (5A, 5B) and the direction of the machine operate, in the activated state, in synchronism to allow parallel and simultaneous movement of the front wheels (5A, 5B).         Engin (1) de manipulation de charges selon l'une des revendications 1 et 2, dans lequel une roue avant (5B) de l'engin n'est pas reliée à la direction (7, 8, 9) par une transmission (10),
    caractérisé en ce que ladite roue avant (5B) est une roue folle.    Load handling machine (1) according to one of claims 1 and 2, in which a front wheel (5B) of the machine is not connected to the steering (7, 8, 9) by a transmission (10 )
    characterized in that said front wheel (5B) is a idler wheel.         Engin (1) de manipulation de charges selon l'une des revendications 1 à 4,
    caractérisé en ce que la direction de l'engin est constituée d'une colonne de direction (8) déplaçable angulairement par l'intermédiaire d'un organe de manoeuvre (7) tel qu'un timon ou un volant, et en ce que chaque transmission (10, 11) est constituée d'une poulie menante (10A, 11A) et d'une poulie menée (10B, 11B) reliées entre elles par un organe sans fin (13) tel qu'une chaíne, chaque poulie menante (10A, 11A) étant accouplable mécaniquement à la colonne de direction (8) par l'intermédiaire d'un embrayage, de préférence électromagnétique, activé en fonction du mode de fonctionnement sélectionné, le mouvement angulaire de l'ensemble colonne de direction (8)/poulie menante (10A, 11A) à l'état embrayé étant transmis par l'organe sans fin (13) à la poulie menée (10B, 11B) déplaçant angulairement la roue (5A, 6) à laquelle elle est couplée de manière à rendre cette dernière directrice.    Load handling device (1) according to one of claims 1 to 4,
    characterized in that the direction of the machine consists of a steering column (8) angularly movable by means of an operating member (7) such as a drawbar or a steering wheel, and in that each transmission (10, 11) consists of a driving pulley (10A, 11A) and a driven pulley (10B, 11B) connected together by an endless member (13) such as a chain, each driving pulley ( 10A, 11A) being mechanically couplable to the steering column (8) by means of a clutch, preferably electromagnetic, activated according to the selected operating mode, the angular movement of the steering column assembly (8) / driving pulley (10A, 11A) in the engaged state being transmitted by the endless member (13) to the driven pulley (10B, 11B) angularly moving the wheel (5A, 6) to which it is coupled so make this last director.         Engin (1) de manipulation de charges selon la revendication 5,
    caractérisé en ce que l'embrayage est constitué d'un vérin (21) coopérant avec un verrou (22) mécanique chargé par ressort et déplaçable axialement parallèlement à l'axe longitudinal de la colonne de direction (8) sous l'action du vérin (21), ce verrou (22) rendant solidaire une poulie menante (10A, 11A) soit de la colonne de direction (8) à l'état activé de la transmission (10, 11), soit d'une structure fixe (24, 25).    Load handling device (1) according to claim 5,
    characterized in that the clutch consists of a jack (21) cooperating with a mechanical spring loaded bolt (22) which can be moved axially parallel to the longitudinal axis of the steering column (8) under the action of the jack (21), this lock (22) making integral a driving pulley (10A, 11A) either of the steering column (8) in the activated state of the transmission (10, 11), or of a fixed structure (24 , 25).         Engin (1) de manipulation de charges selon la revendication 6,
    caractérisé en ce que l'organe de manoeuvre (7) de la direction de l'engin est monté déporté par rapport à l'axe longitudinal médian de l'engin.    Load handling device (1) according to claim 6,
    characterized in that the maneuvering member (7) of the direction of the machine is mounted offset relative to the median longitudinal axis of the machine.         Engin (1) de manipulation de charges selon l'une des revendications 1 à 7,
    caractérisé en ce que la désactivation d'une transmission et/ou respectivement l'activation d'une autre transmission commandées par l'organe de commande (12) de sélection du mode de fonctionnement de l'engin sont asservies au positionnement de la ou des roues directrices (5A, 6) avant désactivation.    Load handling device (1) according to one of claims 1 to 7,
    characterized in that the deactivation of a transmission and / or respectively the activation of another transmission controlled by the control member (12) for selecting the operating mode of the machine are slaved to the positioning of the one or more steered wheels (5A, 6) before deactivation.         Engin (1) de manipulation de charges selon l'une des revendications 1 à 8,
    caractérisé en ce que les roues directrices (5A, 6) sont amenées manuellement dans une position prédéterminée avant désactivation de la transmission (10, 11) par l'intermédiaire de la direction (7, 8, 9) de l'engin (1).    Load handling device (1) according to one of claims 1 to 8,
    characterized in that the steered wheels (5A, 6) are brought manually into a predetermined position before deactivation of the transmission (10, 11) via the direction (7, 8, 9) of the machine (1) .         Engin (1) de manipulation de charges selon l'une des revendications 1 à 9,
    caractérisé en ce que les roues de l'engin à l'état inactivé de leur transmission les reliant à la direction (7, 8, 9) de l'engin sont maintenues immobilisées dans une position prédéterminée au moyen d'au moins une butée mécanique.    Load handling device (1) according to one of claims 1 to 9,
    characterized in that the wheels of the machine in the inactivated state of their transmission connecting them to the direction (7, 8, 9) of the machine are kept immobilized in a predetermined position by means of at least one mechanical stop .         Engin (1) de manipulation de charges selon l'une des revendications 1 à 10,
    caractérisé en ce que le dispositif (3) de levage et de manipulation des charges est constitué d'un tablier (14) porte-fourches (15) animé d'un mouvement de monte et baisse le long d'un mât (16) d'un chariot (17) porte-mât monté à coulissement sur les longerons (2), la base du chariot (17) étant munie d'organes (18) rotatifs moteurs synchrones à sens de rotation inversible coopérant chacun avec une chaíne (19) dont les extrémités sont montées fixes le long d'un longeron (2), la chaíne étant maintenue au moins partiellement enroulée autour de l'organe (18) moteur rotatif pour permettre, lors de l'entraínement en rotation des organes (18) rotatifs, le déplacement du chariot (17) porte-mât (16) le long des longerons (2) suivant un axe parallèle à l'axe longitudinal des longerons (2).    Load handling device (1) according to one of claims 1 to 10,
    characterized in that the device (3) for lifting and handling the loads consists of an apron (14) fork carrier (15) animated by an upward and downward movement along a mast (16) d '' a mast carrier carriage (17) slidably mounted on the side rails (2), the base of the carriage (17) being provided with members (18) rotary synchronous motors with reversible direction of rotation each cooperating with a chain (19) the ends of which are mounted fixed along a spar (2), the chain being kept at least partially wound around the member (18) of the rotary motor to allow, when the rotary members (18) are rotated , the movement of the carriage (17) mast carrier (16) along the beams (2) along an axis parallel to the longitudinal axis of the beams (2).
    EP02291537A 2001-06-22 2002-06-20 Load handling truck such as a stacker Withdrawn EP1270496A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0108253A FR2826353B1 (en) 2001-06-22 2001-06-22 LOAD HANDLING EQUIPMENT SUCH AS A STACKER
    FR0108253 2001-06-22

    Publications (1)

    Publication Number Publication Date
    EP1270496A1 true EP1270496A1 (en) 2003-01-02

    Family

    ID=8864651

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02291537A Withdrawn EP1270496A1 (en) 2001-06-22 2002-06-20 Load handling truck such as a stacker

    Country Status (2)

    Country Link
    EP (1) EP1270496A1 (en)
    FR (1) FR2826353B1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1849744A2 (en) * 2006-04-26 2007-10-31 Benotec Handling cart with at least three steering wheels
    EP1892173A3 (en) * 2006-08-23 2008-10-29 Jungheinrich Aktiengesellschaft Industrial truck with an electrical steering device and method for steering an industrial truck with an electric steering device

    Citations (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2913063A (en) * 1954-09-20 1959-11-17 Raymond Corp Steering and driving mechanism for material handling trucks
    FR1316730A (en) * 1962-01-16 1963-02-01 Yale & Towne Mfg Co Steering system for industrial truck
    GB1029284A (en) * 1962-09-28 1966-05-11 Raymond Corp Improvements in or relating to industrial trucks
    FR2319521A1 (en) * 1975-07-31 1977-02-25 Zelli Sante Control for steerable camera dolly - has two clutches for simultaneous swivel control linked to one lever
    US4257619A (en) * 1978-09-26 1981-03-24 Fisher James L Variable ratio rotary positioning mechanism and camera dolly steering mechanism embodying same
    US4326830A (en) * 1979-05-15 1982-04-27 Cusack Lawrence B Side loading vehicle
    US4411329A (en) * 1982-01-11 1983-10-25 Caterpillar Tractor Co. Vehicle with multi-directional movement capabilities
    EP0712805A2 (en) * 1993-05-18 1996-05-22 Nippon Yusoki Co.,Ltd Reach forklift

    Patent Citations (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2913063A (en) * 1954-09-20 1959-11-17 Raymond Corp Steering and driving mechanism for material handling trucks
    FR1316730A (en) * 1962-01-16 1963-02-01 Yale & Towne Mfg Co Steering system for industrial truck
    GB1029284A (en) * 1962-09-28 1966-05-11 Raymond Corp Improvements in or relating to industrial trucks
    FR2319521A1 (en) * 1975-07-31 1977-02-25 Zelli Sante Control for steerable camera dolly - has two clutches for simultaneous swivel control linked to one lever
    US4257619A (en) * 1978-09-26 1981-03-24 Fisher James L Variable ratio rotary positioning mechanism and camera dolly steering mechanism embodying same
    US4326830A (en) * 1979-05-15 1982-04-27 Cusack Lawrence B Side loading vehicle
    US4411329A (en) * 1982-01-11 1983-10-25 Caterpillar Tractor Co. Vehicle with multi-directional movement capabilities
    EP0712805A2 (en) * 1993-05-18 1996-05-22 Nippon Yusoki Co.,Ltd Reach forklift

    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1849744A2 (en) * 2006-04-26 2007-10-31 Benotec Handling cart with at least three steering wheels
    FR2900382A1 (en) * 2006-04-26 2007-11-02 Benotec Soc Par Actions Simpli HANDLING TROLLEY HAVING AT LEAST THREE DIRECTION WHEELS
    EP1849744A3 (en) * 2006-04-26 2009-04-15 Beaupreau Techniques et Mecaniques Industrielles Handling cart with at least three steering wheels
    US8381860B2 (en) 2006-04-26 2013-02-26 Manitou Bf Truck with at least three steered wheels
    EP1892173A3 (en) * 2006-08-23 2008-10-29 Jungheinrich Aktiengesellschaft Industrial truck with an electrical steering device and method for steering an industrial truck with an electric steering device

    Also Published As

    Publication number Publication date
    FR2826353B1 (en) 2003-09-26
    FR2826353A1 (en) 2002-12-27

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