EP0395518A1 - Pallet with retractable wheels for transporting goods - Google Patents

Pallet with retractable wheels for transporting goods Download PDF

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Publication number
EP0395518A1
EP0395518A1 EP90401135A EP90401135A EP0395518A1 EP 0395518 A1 EP0395518 A1 EP 0395518A1 EP 90401135 A EP90401135 A EP 90401135A EP 90401135 A EP90401135 A EP 90401135A EP 0395518 A1 EP0395518 A1 EP 0395518A1
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EP
European Patent Office
Prior art keywords
rod
pallet
plate
pivoting
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90401135A
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German (de)
French (fr)
Inventor
Claude Sautejeau
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.)
Etat Francais
France Telecom R&D SA
Original Assignee
Etat Francais
Centre National dEtudes des Telecommunications CNET
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etat Francais, Centre National dEtudes des Telecommunications CNET filed Critical Etat Francais
Publication of EP0395518A1 publication Critical patent/EP0395518A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/38—Details or accessories
    • B65D19/40—Elements for spacing platforms from supporting surface
    • B65D19/42—Arrangements or applications of rollers or wheels

Definitions

  • the present invention relates to a pallet for the transport of various loads resting thereon, this pallet being provided with means ensuring its movement on the ground, without in particular having to use a conventional forklift.
  • Support and load transport pallets are well known in the art. Generally, they consist of a plate, usually made of wood, comprising on a parallel upper face and on a lower face, kept at constant spacing by spacers suitably arranged between these faces, by leaving lateral openings for the engagement of the forks. a forklift suitable for lifting one or more pallets of this kind, if necessary stacked on top of each other.
  • Such pallets are designed to support loads of variable origins, which can in particular consist of boxes or similar containers, in which are stacks of mail, sorted or not, which should be moved from one point to another from a room, for example to process this mail, in particular to store or send it according to the indicated destinations.
  • loads of variable origins can in particular consist of boxes or similar containers, in which are stacks of mail, sorted or not, which should be moved from one point to another from a room, for example to process this mail, in particular to store or send it according to the indicated destinations.
  • load of variable origins can in particular consist of boxes or similar containers, in which are stacks of mail, sorted or not, which should be moved from one point to another from a room, for example to process this mail, in particular to store or send it according to the indicated destinations.
  • it is precisely essential to use heavy and bulky handling means, to lift the pallets and move them, or even place them on mobile supports, allowing them to be brought from one station to another. other, possibly separated by a significant distance.
  • the subject of the present invention is a transport pallet which comprises its own means of movement, without however modifying its general structure and above all its capacity for carrying loads, as well as its ability to stack or stack with others. Similar pallets, to constitute a stack making it possible to move them all together using a conventional forklift truck in particular.
  • the pallet in question comprising a plate made up of two horizontal parallel flat surfaces, braced with each other, is characterized in that it comprises a rod mounted to slide relative to the upper surface of the plate and joined to a commanding link arm.
  • each counterweight support is extended, opposite the yoke, by an own extension to come into contact with a fixed stop carried by the plate, to limit the pivoting stroke of the support and from the pendulum to the position where the caster is resting on the ground, the extension of the support then being practically arranged vertically.
  • the end of the rod opposite the link arm, comprises a slide provided with an eyelet or similar housing in which is adapted to engage a ball joint provided at the end of a rod, secured to a carriage maneuver mounted on two wheels and provided with a pivoting lever around the axis of these wheels, so that the cooperation of the ball joint with the eyelet, following a rotation of the lever, determines a traction on the slide, driving the rod and the pivoting of the pendulums.
  • the maneuvering carriage comprises a stop, capable of coming into contact with one side of the pallet to serve as a fulcrum during the movement of rotation of the pivoting lever making the ball joint cooperate with the eyelet of the rod slide, in order to move it relative to the plate.
  • the stop of the carriage has a contact edge with the side of the plate, rounded in an arc of a circle, in order to facilitate the positioning of the carriage relative to the plate, in particular during movements of the pallet on the ground.
  • the sliding rod is integral with the end of a return spring, the other end of which is connected to the plate, so that the displacement of the rod under the effect of the rotation of the lever, by causing the pendulums to pivot, exerts traction on this spring which, after releasing the lever, recalls the rod and the pendulums in the initial position, where the plate rests on the ground.
  • the lever comprises, opposite the carriage, a transverse control bar, facilitating its pivoting around the axis of the wheels and the drive of the pallet on the ground.
  • the pallet considered comprises, in itself conventional for this type of object, a tray 1 comprising an upper surface 2, flat and horizontal, on which the loads to be transported rest (not shown), and a lower surface 3 of support on the ground, parallel to the surface 2 and extending at an appropriate distance from the latter by means of spacers 4, distributed between these two surfaces, transversely and longitudinally.
  • spacers 4 are in particular produced so as to provide in the pallet, under the upper surface, recesses 5 allowing, in known manner, the engagement in them of the forks of a forklift (not shown) for lifting and the movement of the pallet, if necessary of a set of such pallets stacked on one another.
  • the pallet is provided, independently of the provisions indicated above suitable for authorizing its handling by a conventional lift, with means ensuring its independent movement on the ground using a simple trolley, maneuvered manually, likely to cause a slight lifting of this pallet and, during this, the support on the ground of castors, then allowing, in combination with the carriage, the drive of this pallet.
  • the pallet comprises, mounted under the upper surface 2 of the plate 1, a longitudinal rod 6, preferably arranged in the middle part of the pallet ( Figure 3), this rod being guided in its movement under the surface 2 by bearings 7.
  • the rod 6 comprises a slide 8 allowing its connection with a maneuvering carriage 30, the detail of which will be explained below, this carriage making it possible in particular to exercise on this rod an appropriate tensile force.
  • the rod 6 is connected by an articulation 9, to a link arm in two parts 10 and 11, joined together by an articulation 12.
  • the second part 11 of the link arm is also articulated at its opposite end on a first transverse axis 13, mounted in a fixed position on the pallet and capable of pivoting on itself following the relative rotation of the two parts 10 and 11 of the connecting arm, following a tensile force exerted on the rod 6.
  • the axis 13 comprises two pendulums 14, mounted in recesses 15, arranged in these sides, each of these pendulums 14, pivoting with the axis 13 , being provided to control the rotation of a support 16 mounted mobile around a second transverse axis 17, carried by the pallet.
  • Each support 16 comprises on one side a yoke 18 for mounting a caster 19 around an axis 20 and on the other side an extension forming a counterweight 21, the mass of the latter being such that it normally drives the support 16 in a substantially horizontal position, where the roller 19 is raised and retracted into the corresponding recess 15, therefore without its support on the ground.
  • a stop 22 is also provided in the recess 15 to stop the counterweight 21 when the latter is raised by the associated pendulum 14, as a result of the pivoting of the support 16 in the manner described below.
  • the rod 6 At its end opposite to that linked to the transverse shaft 13, the rod 6 is provided with a finger 23 extending downwards and on which a hook 24 is fixed, provided at the end of a spring 25, the other end is joined to a fastener 26 secured to an appropriate spacer 4 of the pallet, this spring making it possible to exert on the rod a permanent return force, tending to bring the rod back to the position illustrated in FIG. 1, where the pendulums 14 do not act on the supports 16 of the counterweights 21, the rollers 19 being retracted in the recesses 15.
  • a stop 36 limits the return stroke of the rod 6 vis-à-vis the pallet.
  • the slide 8, mounted at the end of the rod 6, comprises an eyelet 27 or similar housing, in which is capable of engaging a ball joint 28, provided at the end of a rod 29 carried by the maneuvering carriage 30, this being shown in front view in Figure 4 and in side views in Figures 1 and 2, respectively before and after it exerts a tensile force on the rod 6.
  • This carriage 30 has two wheels lateral 31 and a pivot lever 32 around the axis of these wheels.
  • the lever 32 is provided with a transverse control and guide bar 33.
  • the carriage 30 has a stop 34 whose outer edge 35 preferably has a profile rounded in an arc.
  • the pallet in the storage position, the pallet is in contact with the ground as shown in FIG. 1 and can receive on its tray 1 various loads which it is suitable at an instant given to move with the pallet from one place to another, without using a heavy lift, possibly not available.
  • the carriage 30, brought with its pivot lever 32 in a substantially vertical position the rod 29 then being slightly inclined so that it can be introduced into the corresponding side of the pallet to bring the ball 28 under the eyelet 27.
  • the displacement of the rod thus controlled in turn causes the rotation of the connecting arm by its two articulated parts 10 and 11, the pivoting of the axis 13 and consequently that of the pendulums 14. These then determine the raising the counterweights 21 by pivoting the supports 16 about their axes 17, until contact with the stopper 22.
  • the rollers 19 are gradually brought into contact with the ground, by determining by reaction a slight lifting thereon of the pallet as shown in Figure 2, the support 16 then being substantially in the vertical position.
  • the pallet can then be driven by the carriage 30, rolling with the latter on its rollers to the desired location where, by a reverse operation, the carriage 30 is detached from the rod 6.
  • the spring return 25 returns the rod to the initial position, with pivoting of the pendulums in the opposite direction and raising of the rollers 19 in the recess 15 under the effect of the counterweights 21.
  • a transport pallet of simple design can thus be produced which can result from an easy and inexpensive adaptation of a conventional pallet.
  • the improvement according to the invention does not modify the behavior of the pallet under load, but gives it perfect mobility, combined with very rapid implementation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)
  • Pallets (AREA)

Abstract

Pallet for transporting loads, equipped with autonomous means of displacement, comprising a deck (1) consisting of two horizontal, parallel, plane surfaces (2, 3) mutually braced. According to the invention, this pallet is characterised in that it comprises a rod (6) mounted slidably relative to the upper surface (2) of the deck and connected to a linking arm (10, 11) controlling the rotation about a first transverse shaft (13) of two rocking levers (14) fixed to the ends of this shaft, each rocking lever being provided in order to trigger around a second shaft (17) carried by the deck of a support (16) of a counterweight (21), ending in a cap piece (28) equipped with a castor (29) so that a force exerted on the rod to trigger its relative displacement in relation to the deck determines the pivoting, in one direction, of each rocking lever and, consequently, the pivoting in the opposite direction of the support of the corresponding counterweight, bringing the castor carried by the cap piece into contact with the ground on which the pallet rests, ensuring, by reaction thereon, the raising of this pallet and conferring on it the ability to be displaced over the ground. <IMAGE>

Description

La présente invention est relative à une palette pour le transport de charges diverses reposant sur celle-ci, cette palette étant munie de moyens assurant son déplacement sur le sol, sans avoir notamment à mettre en oeuvre un chariot élévateur classique.The present invention relates to a pallet for the transport of various loads resting thereon, this pallet being provided with means ensuring its movement on the ground, without in particular having to use a conventional forklift.

Les palettes de support et de transport de charges sont bien connues dans la technique. Généralement, elles sont constituées d'un plateau, usuellement en bois, comportant sur une face supérieure et sur une face inférieure parallèles, maintenues à écartement constant par des entretoises convenablement disposées entre ces faces, en ménageant des ouvertures latérales pour l'engagement des fourches d'un chariot élévateur propre à soulever une ou plusieurs palettes de ce genre, le cas échéant empilées l'une sur l'autre.Support and load transport pallets are well known in the art. Generally, they consist of a plate, usually made of wood, comprising on a parallel upper face and on a lower face, kept at constant spacing by spacers suitably arranged between these faces, by leaving lateral openings for the engagement of the forks. a forklift suitable for lifting one or more pallets of this kind, if necessary stacked on top of each other.

De telles palettes sont prévues pour supporter des charges d'origines variables, qui peuvent notamment être constituées par des caissettes ou conteneurs analogues, dans lesquels sont disposées des piles de courrier, trié ou non, qu'il convient de déplacer d'un point à un autre d'un local, pour procéder par exemple au traitement de ce courrier, en particulier pour le stocker ou l'expédier en fonction des destinations indiquées. Or, avec les palettes classiques, il est précisément indispensable de faire appel à des moyens de manutention lourds et encombrants, pour soulever les palettes et les déplacer, ou encore les déposer sur des supports mobiles, permettant de les amener d'un poste à un autre, éventuellement séparés par une distance non négligeable.Such pallets are designed to support loads of variable origins, which can in particular consist of boxes or similar containers, in which are stacks of mail, sorted or not, which should be moved from one point to another from a room, for example to process this mail, in particular to store or send it according to the indicated destinations. However, with conventional pallets, it is precisely essential to use heavy and bulky handling means, to lift the pallets and move them, or even place them on mobile supports, allowing them to be brought from one station to another. other, possibly separated by a significant distance.

Ces moyens sont peu pratiques et onéreux, et par suite peu justifiés si le nombre des palettes à déplacer est relativement réduit.These means are impractical and expensive, and therefore hardly justified if the number of pallets to be moved is relatively small.

La présente invention a pour objet une palette de transport qui comporte ses propres moyens de déplacement, sans modifier pour autant sa structure générale et surtout sa capacité de portage de charges, aussi bien que sa faculté de s'empiler ou se gerber avec d'autres palettes analogues, pour constituer une pile permettant de les déplacer toutes ensemble grâce à un chariot classique à fourches élévatrices notamment.The subject of the present invention is a transport pallet which comprises its own means of movement, without however modifying its general structure and above all its capacity for carrying loads, as well as its ability to stack or stack with others. similar pallets, to constitute a stack making it possible to move them all together using a conventional forklift truck in particular.

A cet effet, la palette considérée, comportant un plateau constitué de deux surfaces planes parallèles horizontales, entretoisées mutuellement, se caractérise en ce qu'elle comporte une tringle montée coulissante par rapport à la surface supérieure du plateau et réunie à un bras de liaison commandant la rotation autour d'un premier axe transversal de deux balanciers fixés aux extrémités de cet axe, chaque balancier étant prévu pour provoquer le pivotement autour d'un second axe porté par le plateau d'un support de contrepoids, terminé par une chape munie d'une roulette, de telle sorte qu'un effort exercé sur la tringle pour provoquer son déplacement relatif par rapport au plateau, détermine le pivotement dans un sens de chaque balancier et, par suite, dans le sens opposé, du support du contrepoids correspondant, amenant la roulette portée par la chape au contact du sol sur lequel repose la palette, en assurant, par réaction sur celui-ci, le soulèvement de cette palette et en lui conférant une faculté de déplacement sur le sol.To this end, the pallet in question, comprising a plate made up of two horizontal parallel flat surfaces, braced with each other, is characterized in that it comprises a rod mounted to slide relative to the upper surface of the plate and joined to a commanding link arm. the rotation about a first transverse axis of two pendulums fixed at the ends of this axis, each pendulum being provided to cause pivoting around a second axis carried by the plate of a counterweight support, terminated by a yoke provided with a caster, so that a force exerted on the rod to cause its relative displacement relative to the plate, determines the pivoting in one direction of each pendulum and, consequently, in the opposite direction, of the support of the corresponding counterweight, bringing the caster carried by the yoke into contact with the ground on which the pallet rests, ensuring, by reaction on it, the lifting of this palette and giving it the ability to move on the ground.

Selon une autre caractéristique de l'invention, chaque support de contrepoids est prolongé, à l'opposé de la chape, par une extension propre à venir en contact avec une butée fixe portée par le plateau, pour limiter la course de pivotement du support et du balancier jusqu'à la position où la roulette est en appui sur le sol, l'extension du support étant alors pratiquement disposée à la verticale.According to another characteristic of the invention, each counterweight support is extended, opposite the yoke, by an own extension to come into contact with a fixed stop carried by the plate, to limit the pivoting stroke of the support and from the pendulum to the position where the caster is resting on the ground, the extension of the support then being practically arranged vertically.

Avantageusement, l'extrémité de la tringle, opposée au bras de liaison, comporte un coulisseau muni d'un oeillet ou logement analogue dans lequel est adaptée à s'engager une rotule prévue en bout d'une tige, solidaire d'un chariot de manoeuvre monté sur deux roues et muni d'un levier de pivotement autour de l'axe de ces roues, de telle manière que la coopération de la rotule avec l'oeillet, consécutivement à une rotation du levier, détermine une traction sur le coulisseau, entraînant la tringle et le pivotement des balanciers.Advantageously, the end of the rod, opposite the link arm, comprises a slide provided with an eyelet or similar housing in which is adapted to engage a ball joint provided at the end of a rod, secured to a carriage maneuver mounted on two wheels and provided with a pivoting lever around the axis of these wheels, so that the cooperation of the ball joint with the eyelet, following a rotation of the lever, determines a traction on the slide, driving the rod and the pivoting of the pendulums.

Selon une autre caractéristique également, le chariot de manoeuvre comporte une butée, apte à venir en contact avec un côté de la palette pour servir de point d'appui lors du mouvement de rotation du levier de pivotement faisant coopérer la rotule avec l'oeillet du coulisseau de la tringle, en vue du déplacement de celle-ci par rapport au plateau.According to another characteristic also, the maneuvering carriage comprises a stop, capable of coming into contact with one side of the pallet to serve as a fulcrum during the movement of rotation of the pivoting lever making the ball joint cooperate with the eyelet of the rod slide, in order to move it relative to the plate.

De préférence, la butée du chariot présente un bord de contact avec le côté du plateau, arrondi en arc de cercle, afin de faciliter le positionnement du chariot par rapport au plateau, notamment lors des mouvements de la palette sur le sol.Preferably, the stop of the carriage has a contact edge with the side of the plate, rounded in an arc of a circle, in order to facilitate the positioning of the carriage relative to the plate, in particular during movements of the pallet on the ground.

Dans un mode de réalisation particulier de l'invention, la tringle coulissante est solidaire de l'extrémité d'un ressort de rappel, dont l'autre extrémité est reliée au plateau, de sorte que le déplacement de la tringle sous l'effet de la rotation du levier, en provoquant le pivotement des balanciers, exerce une traction sur ce ressort qui, après relâchement du levier, rappelle la tringle et les balanciers en position initiale, où le plateau repose sur le sol.In a particular embodiment of the invention, the sliding rod is integral with the end of a return spring, the other end of which is connected to the plate, so that the displacement of the rod under the effect of the rotation of the lever, by causing the pendulums to pivot, exerts traction on this spring which, after releasing the lever, recalls the rod and the pendulums in the initial position, where the plate rests on the ground.

Avantageusement également, le levier comporte, à l'opposé du chariot, une barre transversale de commande, facilitant son pivotement autour de l'axe des roues et l'entraînement de la palette sur le sol.Advantageously also, the lever comprises, opposite the carriage, a transverse control bar, facilitating its pivoting around the axis of the wheels and the drive of the pallet on the ground.

D'autres caractéristiques d'une palette de transport de charges, établie conformément à l'invention, apparaîtront encore à travers la description qui suit d'un exemple de réalisation, donné à titre indicatif et non limitatif, en référence aux dessins annexés sur lesquels :

  • - Les Figures 1 et 2 sont des vues en coupe transversale de la palette de transport de charges considérée, respectivement représentée en appui sur le sol et soulevée de celui-ci au moyen d'un chariot de manoeuvre, permettant également d'assurer son déplacement.
  • - La Figure 3 est une vue de dessous, à légèremement plus faible échelle, de la palette selon les Figures 1 et 2.
  • - La Figure 4 est une vue en élévation, à échelle plus réduite, du chariot de manoeuvre.
Other characteristics of a pallet for transporting loads, established in accordance with the invention, will become more apparent from the following description of an exemplary embodiment, given by way of indicative and not limiting, with reference to the accompanying drawings in which:
  • - Figures 1 and 2 are cross-sectional views of the load transport pallet considered, respectively depicted on the ground and lifted from the latter by means of an operating trolley, also making it possible to move it .
  • - Figure 3 is a bottom view, slightly smaller scale, of the pallet according to Figures 1 and 2.
  • - Figure 4 is an elevational view, on a smaller scale, of the maneuvering cart.

Comme représenté sur ces Figures et en particulier sur les vues en coupe transversale des Figures 1 et 2, la palette considérée comporte, de façon en elle-même classique pour ce genre d'objet, un plateau 1 comprenant une surface supérieure 2, plane et horizontale, sur laquelle reposent les charges à transporter (non représentées), et une surface inférieure 3 d'appui au sol, parallèle à la surface 2 et s'étendant à distance appropriée de cette dernière au moyen d'entretoises 4, réparties entre ces deux surfaces, transversalement et longitudinalement. Ces entretoises 4 sont notamment réalisées de manière à ménager dans la palette, sous la surface supérieure, des évidements 5 permettant, de façon connue, l'engagement dans ceux-ci des fourches d'un chariot élévateur (non représenté) pour la soulèvement et le déplacement de la palette, le cas échéant d'un ensemble de telles palettes empilées les unes sur les autres.As shown in these Figures and in particular in the cross-sectional views of Figures 1 and 2, the pallet considered comprises, in itself conventional for this type of object, a tray 1 comprising an upper surface 2, flat and horizontal, on which the loads to be transported rest (not shown), and a lower surface 3 of support on the ground, parallel to the surface 2 and extending at an appropriate distance from the latter by means of spacers 4, distributed between these two surfaces, transversely and longitudinally. These spacers 4 are in particular produced so as to provide in the pallet, under the upper surface, recesses 5 allowing, in known manner, the engagement in them of the forks of a forklift (not shown) for lifting and the movement of the pallet, if necessary of a set of such pallets stacked on one another.

Conformément à l'invention, la palette est munie, indépendamment des dispositions indiquées ci-dessus propres à autoriser sa manutention par un élévateur classique, de moyens assurant son déplacement autonome sur le sol à l'aide d'un simple chariot, manoeuvré manuellement, susceptible de provoquer un léger soulèvement de cette palette et, au cours de celui-ci, l'appui au sol de roulettes, permettant alors, en combinaison avec le chariot, l'entraînement de cette palette.In accordance with the invention, the pallet is provided, independently of the provisions indicated above suitable for authorizing its handling by a conventional lift, with means ensuring its independent movement on the ground using a simple trolley, maneuvered manually, likely to cause a slight lifting of this pallet and, during this, the support on the ground of castors, then allowing, in combination with the carriage, the drive of this pallet.

A cet effet, la palette comporte, montée sous la surface supérieure 2 du plateau 1, une tringle longitudinale 6, de préférence disposée dans la partie médiane de la palette (Figure 3), cette tringle étant guidée dans son mouvement sous la surface 2 par des paliers 7. A l'une de ses extrémités, la tringle 6 comporte un coulisseau 8 permettant sa liaison avec un chariot de manoeuvre 30, dont le détail de la réalisation sera explicité plus loin, ce chariot permettant notamment d'exercer sur cette tringle un effort de traction approprié. A son extrémité opposée, la tringle 6 est reliée par une articulation 9, à un bras de liaison en deux parties 10 et 11, réunies entre elles par une articulation 12. La seconde partie 11 du bras de liaison est également articulée à son extrémité opposée sur un premier axe transversal 13, monté en position fixe sur la palette et susceptible de pivoter sur lui-même consécutivement à la rotation relative des deux parties 10 et 11 du bras de liaison, suite à un effort de traction exercé sur la tringle 6.To this end, the pallet comprises, mounted under the upper surface 2 of the plate 1, a longitudinal rod 6, preferably arranged in the middle part of the pallet (Figure 3), this rod being guided in its movement under the surface 2 by bearings 7. At one of its ends, the rod 6 comprises a slide 8 allowing its connection with a maneuvering carriage 30, the detail of which will be explained below, this carriage making it possible in particular to exercise on this rod an appropriate tensile force. At its opposite end, the rod 6 is connected by an articulation 9, to a link arm in two parts 10 and 11, joined together by an articulation 12. The second part 11 of the link arm is also articulated at its opposite end on a first transverse axis 13, mounted in a fixed position on the pallet and capable of pivoting on itself following the relative rotation of the two parts 10 and 11 of the connecting arm, following a tensile force exerted on the rod 6.

A ses deux extrémités, au voisinage des côtés latéraux du plateau 1 de la palette, l'axe 13 comporte deux balanciers 14, montés dans des évidements 15, aménagés dans ces côtés, chacun de ces balanciers 14, en pivotant avec l'axe 13, étant prévu pour commander la rotation d'un support 16 monté mobile autour d'un second axe transversal 17, porté par la palette. Chaque support 16 comporte d'un côté une chape 18 pour le montage d'une roulette 19 autour d'un axe 20 et de l'autre côté une extension formant contrepoids 21, la masse de celui-ci étant telle qu'elle entraîne normalement le support 16 en position sensiblement horizontale, où la roulette 19 est relevée et escamotée dans l'évidement 15 correspondant, donc sans appui de celle-ci sur le sol. Une butée 22 est par ailleurs prévue dans l'évidement 15 pour arrêter le contrepoids 21 lorsque celui-ci est relevé par le balancier 14 associé, par suite du pivotement du support 16 de la façon décrite ci-­après.At its two ends, in the vicinity of the lateral sides of the plate 1 of the pallet, the axis 13 comprises two pendulums 14, mounted in recesses 15, arranged in these sides, each of these pendulums 14, pivoting with the axis 13 , being provided to control the rotation of a support 16 mounted mobile around a second transverse axis 17, carried by the pallet. Each support 16 comprises on one side a yoke 18 for mounting a caster 19 around an axis 20 and on the other side an extension forming a counterweight 21, the mass of the latter being such that it normally drives the support 16 in a substantially horizontal position, where the roller 19 is raised and retracted into the corresponding recess 15, therefore without its support on the ground. A stop 22 is also provided in the recess 15 to stop the counterweight 21 when the latter is raised by the associated pendulum 14, as a result of the pivoting of the support 16 in the manner described below.

A son extrémité opposée à celle liée à l'arbre transversal 13, la tringle 6 est munie d'un doigt 23 s'étendant vers le bas et sur lequel est fixé un crochet 24, prévu en bout d'un ressort 25 dont l'autre extrémité est réunie à une attache 26 solidaire d'une entretoise appropriée 4 de la palette, ce ressort permettant d'exercer sur la tringle un effort de rappel permanent, tendant à ramener la tringle dans la position illustrée sur la Figure 1, où les balanciers 14 n'agissent pas sur les supports 16 des contrepoids 21, les roulettes 19 étant escamotées dans les évidements 15. Une butée 36 limite la course de retour de la tringle 6 vis-à-vis de la palette.At its end opposite to that linked to the transverse shaft 13, the rod 6 is provided with a finger 23 extending downwards and on which a hook 24 is fixed, provided at the end of a spring 25, the other end is joined to a fastener 26 secured to an appropriate spacer 4 of the pallet, this spring making it possible to exert on the rod a permanent return force, tending to bring the rod back to the position illustrated in FIG. 1, where the pendulums 14 do not act on the supports 16 of the counterweights 21, the rollers 19 being retracted in the recesses 15. A stop 36 limits the return stroke of the rod 6 vis-à-vis the pallet.

Le coulisseau 8, monté en bout de la tringle 6, comporte un oeillet 27 ou logement analogue, dans lequel est susceptible de s'engager une rotule 28, prévue à l'extrémité d'une tige 29 portée par le chariot de manoeuvre 30, celui-ci étant représenté en vue de face sur la Figure 4 et en vues de côté sur les Figures 1 et 2, respectivement avant et après qu'il n'exerce un effort de traction sur la tringle 6. Ce chariot 30 comporte deux roues latérales 31 et un levier de pivotement 32 autour de l'axe de ces roues. A l'opposé, le levier 32 est muni d'une barre transversale de commande et de guidage 33. Enfin, le chariot 30 comporte une butée 34 dont le bord extérieur 35 présente de préférence un profil arrondi en arc de cercle.The slide 8, mounted at the end of the rod 6, comprises an eyelet 27 or similar housing, in which is capable of engaging a ball joint 28, provided at the end of a rod 29 carried by the maneuvering carriage 30, this being shown in front view in Figure 4 and in side views in Figures 1 and 2, respectively before and after it exerts a tensile force on the rod 6. This carriage 30 has two wheels lateral 31 and a pivot lever 32 around the axis of these wheels. In contrast, the lever 32 is provided with a transverse control and guide bar 33. Finally, the carriage 30 has a stop 34 whose outer edge 35 preferably has a profile rounded in an arc.

Le fonctionnement de la palette de transport ainsi décrite se déduit dès lors aisément : en position de stockage, la palette est en appui au sol comme représenté sur la Figure 1 et peut recevoir sur son plateau 1 des charges diverses qu'il convient à un instant donné de déplacer avec la palette d'un endroit à un autre, sans faire appel à un élévateur lourd, éventuellement non disponible. Pour ceci, il suffit, avec la palette selon l'invention, de disposer du chariot 30, amené avec son levier de pivotement 32 en position sensiblement verticale, la tige 29 étant alors légèrement inclinée de telle sorte qu'elle puisse s'introduire dans le côté correspondant de la palette afin d'amener la rotule 28 sous l'oeillet 27. La rotation du levier 32 (voir Figure 2) autour du point fixe constitué par l'axe des roues 31, permet alors à cette rotule de s'engager dans l'oeillet en même temps que la butée 34 vient en appui contre une saillie fixe 37, en provoquant sur le coulisseau 8 et par suite sur la tringle 6 qui lui est liée, un effort de traction de la droite vers la gauche sur les Figures 1 et 2.The operation of the transport pallet thus described is therefore easily deduced: in the storage position, the pallet is in contact with the ground as shown in FIG. 1 and can receive on its tray 1 various loads which it is suitable at an instant given to move with the pallet from one place to another, without using a heavy lift, possibly not available. For this, it suffices, with the pallet according to the invention, to have the carriage 30, brought with its pivot lever 32 in a substantially vertical position, the rod 29 then being slightly inclined so that it can be introduced into the corresponding side of the pallet to bring the ball 28 under the eyelet 27. The rotation of the lever 32 (see Figure 2) around the fixed point formed by the axis of the wheels 31, then allows this ball to engage in the eyelet at the same time as the stop 34 comes to bear against a fixed projection 37, causing on the slide 8 and consequently on the rod 6 which is linked to it, a tensile force from the right to the left in FIGS. 1 and 2.

Le déplacement de la tringle ainsi commandé provoque à son tour l'entraînement en rotation du bras de liaison par ses deux parties articulées 10 et 11, le pivotement de l'axe 13 et par suite celui des balanciers 14. Ceux-ci déterminent alors le relèvement des contrepoids 21 par pivotement des supports 16 autour de leurs axes 17, jusqu'à contact avec la butée 22. Dans ce mouvement, les roulettes 19 sont progressivement amenées au contact du sol, en déterminant par réaction sur celui-ci un léger soulèvement de la palette tel que représenté sur la Figure 2, le support 16 étant alors sensiblement en position verticale. La palette peut ensuite être entraînée par le chariot 30, en roulant avec celui-ci sur ses roulettes jusqu'à l'endroit souhaité où, par une manoeuvre inverse, le chariot 30 est désolidarisé de la tringle 6. A cet instant, le ressort de rappel 25 ramène la tringle en position initiale, avec pivotement en sens inverse des balanciers et relèvement des roulettes 19 dans l'évidement 15 sous l'effet des contrepoids 21.The displacement of the rod thus controlled in turn causes the rotation of the connecting arm by its two articulated parts 10 and 11, the pivoting of the axis 13 and consequently that of the pendulums 14. These then determine the raising the counterweights 21 by pivoting the supports 16 about their axes 17, until contact with the stopper 22. In this movement, the rollers 19 are gradually brought into contact with the ground, by determining by reaction a slight lifting thereon of the pallet as shown in Figure 2, the support 16 then being substantially in the vertical position. The pallet can then be driven by the carriage 30, rolling with the latter on its rollers to the desired location where, by a reverse operation, the carriage 30 is detached from the rod 6. At this instant, the spring return 25 returns the rod to the initial position, with pivoting of the pendulums in the opposite direction and raising of the rollers 19 in the recess 15 under the effect of the counterweights 21.

On notera enfin que, lors du déplacement de la palette par le chariot 30, le bord extérieur 35 de la butée 34 permet, grâce à son profil arrondi, les changements de direction nécessaires, comme le schématise la Figure 3.Finally, it will be noted that, during the movement of the pallet by the carriage 30, the outer edge 35 of the stop 34 allows, thanks to its rounded profile, the necessary changes of direction, as shown in FIG. 3.

On réalise ainsi une palette de transport de conception simple pouvant résulter d'une adaptation aisée et peu onéreuse d'une palette classique. Le perfectionnement selon l'invention me modifie pas la tenue sous charges de la palette mais confère à celle-ci une mobilité parfaite, jointe à une très grande rapidité de mise en oeuvre.A transport pallet of simple design can thus be produced which can result from an easy and inexpensive adaptation of a conventional pallet. The improvement according to the invention does not modify the behavior of the pallet under load, but gives it perfect mobility, combined with very rapid implementation.

Bien entendu, il va de soi que l'invention ne se limite pas à l'exemple de réalisation décrit et représenté ci-dessus ; elle en embrasse au contraire toutes les variantes.Of course, it goes without saying that the invention is not limited to the embodiment described and shown above; on the contrary, it embraces all its variants.

Claims (7)

1 - Palette de transport de charges munie de moyens de déplacement autonomes, comportant un plateau (1) constitué de deux surfaces planes parallèles horizontales (2, 3), entretoisées mutuellement, caractérisée en ce qu'elle comporte une tringle (6) montée coulissante par rapport à la surface supérieure (2) du plateau et réunie à un bras de liaison (10, 11) commandant la rotation autour d'un premier axe transversal (13) de deux balanciers (14) fixés aux extrémités de cet axe, chaque balancier étant prévu pour provoquer autour d'un second axe (17) porté par le plateau d'un support (16) de contrepoids (21), terminé par une chape (18) munie d'une roulette (19), de telle sorte qu'un effort exercé sur la tringle pour provoquer son déplacement relatif par rapport au plateau, détermine le pivotement dans un sens de chaque balancier et, par suite, dans le sens opposé, du support du contrepoids correspondant, amenant la roulette portée par la chape au contact du sol sur lequel repose la palette, en assurant, par réaction sur celui-­ci, le soulèvement de cette palette et en lui conférant une faculté de déplacement sur le sol.1 - Pallet for transporting loads provided with autonomous displacement means, comprising a plate (1) consisting of two horizontal parallel flat surfaces (2, 3), mutually braced, characterized in that it comprises a rod (6) slidingly mounted relative to the upper surface (2) of the plate and joined to a link arm (10, 11) controlling the rotation about a first transverse axis (13) of two pendulums (14) fixed to the ends of this axis, each pendulum being provided to cause around a second axis (17) carried by the plate of a support (16) of counterweight (21), terminated by a yoke (18) provided with a roller (19), so that an effort exerted on the rod to cause its relative displacement relative to the plate, determines the pivoting in one direction of each pendulum and, consequently, in the opposite direction, of the support of the corresponding counterweight, bringing the caster carried by the yoke in contact with the ground on the which rests the pallet, ensuring, by reaction on it, the lifting of this pallet and giving it the ability to move on the ground. 2 - Palette de transport selon la revendication 1, caractérisée en ce que chaque support (16) de contrepoids (21) est prolongé, à l'opposé de la chape (18), par une extension propre à venir en contact avec une butée fixe (22) portée par le plateau (1), pour limiter la course de pivotement du support et du balancier (14) jusqu'à la position où la roulette (19) est en appui sur le sol, l'extension du support étant alors disposée à la verticale.2 - Transport pallet according to claim 1, characterized in that each support (16) of counterweight (21) is extended, opposite the yoke (18), by a clean extension to come into contact with a fixed stop (22) carried by the plate (1), to limit the pivoting stroke of the support and of the pendulum (14) to the position where the caster (19) is in contact with the ground, the extension of the support then being arranged vertically. 3 - Palette de transport selon l'une des revendications 1 ou 2, caractérisée en ce que l'extrémité de la tringle (6), opposée au bras de liaison (10, 11) comporte un coulisseau (8) muni d'un oeillet (27) ou logement analogue, dans lequel est adaptée à s'engager une rotule (28) prévue en bout d'une tige (29) solidaire d'un chariot de manoeuvre (30) monté sur deux roues (31) et muni d'un levier de pivotement (32) autour de l'axe de ces roues, de telle manière que la coopération de la rotule avec l'oeillet, consécutivement à une rotation du levier, détermine une traction sur le coulisseau, entraînant la tringle et le pivotement des balanciers.3 - Transport pallet according to one of claims 1 or 2, characterized in that the end of the rod (6), opposite the link arm (10, 11) comprises a slide (8) provided with an eyelet (27) or similar housing, in which is adapted to engage a ball joint (28) provided at the end of a rod (29) integral with an operating carriage (30) mounted on two wheels (31) and provided with '' a pivot lever (32) around the axis of these wheels, so that the cooperation of the ball joint with the eyelet, following a rotation of the lever, determines a traction on the slide, causing the rod and the pivoting of the pendulums. 4 - Palette de transport selon la revendication 3, caractérisée en ce que le chariot de manoeuvre comporte une butée (34), apte à venir en contact avec un côté du plateau (1) pour servir de point d'appui lors du mouvement de rotation du levier de pivotement (32), faisant coopérer la rotule (28) avec l'oeillet (27) du coulisseau (8) de la tringle (6), en vue du déplacement de celle-ci par apport au plateau.4 - Transport pallet according to claim 3, characterized in that the maneuvering carriage comprises a stop (34), capable of coming into contact with one side of the plate (1) to serve as a fulcrum during the rotational movement of the pivoting lever (32), making the ball joint (28) cooperate with the eyelet (27) of the slide (8) of the rod (6), with a view to the displacement of the latter by contribution to the plate. 5 - Palette de transport selon la revendication 4, caractérisée en ce que la butée (34) du chariot (30) présente un bord de contact (35) avec le côté du plateau (1), arrondi en arc de cercle.5 - Transport pallet according to claim 4, characterized in that the stop (34) of the carriage (30) has a contact edge (35) with the side of the plate (1), rounded in an arc. 6 - Palette de transport selon l'une quelconque des revendications 1 à 5, carcatérisée en ce que la tringle coulissante (6) est solidaire de l'extrémité d'un ressort de rappel (25), dont l'autre extrémité est reliée au plateau (1), de telle sorte que le déplacement de la tringle sous l'effet de la rotation du levier (32), en provoquant le pivotement des balanciers (14), exerce une traction sur ce ressort qui, après relâchement du levier, rappelle la tringle et les balanciers en position initiale, où le plateau repose sur le sol.6 - Transport pallet according to any one of claims 1 to 5, carcatized in that the sliding rod (6) is integral with the end of a return spring (25), the other end of which is connected to the plate (1), so that the displacement of the rod under the effect of the rotation of the lever (32), by causing the pivoting of the rockers (14), exerts a traction on this spring which, after releasing the lever, recalls the rod and the pendulums in the initial position, where the platform rests on the ground. 7 - Palette de transport sselon la revendication 3, caractérisée en ce que le levier (32) comporte, à l'opposé de la butée (34), une barre transversalle de commande (33).7 - Transport pallet according to claim 3, characterized in that the lever (32) comprises, opposite the stop (34), a transverse control bar (33).
EP90401135A 1989-04-28 1990-04-25 Pallet with retractable wheels for transporting goods Withdrawn EP0395518A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905722 1989-04-28
FR8905722A FR2646391B1 (en) 1989-04-28 1989-04-28 AUTONOMOUS PALLET WITH RETRACTABLE CASTERS FOR THE TRANSPORT OF LOADS

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29617184U1 (en) * 1996-10-02 1996-11-21 Chep Deutschland GmbH, 50996 Köln Pallet and towing device therefor
EP0774419A1 (en) * 1995-11-17 1997-05-21 GE Polymer Logistics Tiltable portable pallet
WO1999011544A1 (en) * 1997-08-29 1999-03-11 Jaederberg Sven Device at a load carrier
EP0972713A1 (en) * 1998-07-13 2000-01-19 Moldec Co., Ltd. Transportable storage container
AU782038B2 (en) * 2000-11-27 2005-06-30 Whincup, Bradley Douglas Mr Transport apparatus
GB2410238A (en) * 2004-01-20 2005-07-27 Linpac Mouldings Ltd Pallet with retractable wheels
GB2430926A (en) * 2005-10-06 2007-04-11 Linpac Materials Handling Ltd Pallet with retractable wheels
US8403344B2 (en) 2008-03-19 2013-03-26 Ds Smith Plastics Limited Dolly
CN107054835A (en) * 2017-03-19 2017-08-18 玉溪市新特材料有限公司 A kind of rotatable stacking tobacco leaf frame column supporting leg
CN111003319A (en) * 2019-11-25 2020-04-14 上海电机学院 Container storage and transportation logistics pallet
CN111039232A (en) * 2019-12-06 2020-04-21 杭州优智物联科技有限公司 Forklift device and method for quickly loading and unloading goods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610841C2 (en) * 1996-03-19 1998-04-16 Karl Friz Device for moving pallets
DE102017002940A1 (en) 2017-03-24 2018-09-27 Frank Driesen hoist

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Publication number Priority date Publication date Assignee Title
AU16437A (en) * 1937-01-14 1938-01-27 Standard Telephones and Cables (australasia ) Limited Thermionic valve amplifiers
US3001797A (en) * 1958-09-30 1961-09-26 John W Kappen Pallet transporting apparatus
GB1438723A (en) * 1973-09-08 1976-06-09 Anders Krahner Ab Mobile pallet and truck assembly for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU16437A (en) * 1937-01-14 1938-01-27 Standard Telephones and Cables (australasia ) Limited Thermionic valve amplifiers
US3001797A (en) * 1958-09-30 1961-09-26 John W Kappen Pallet transporting apparatus
GB1438723A (en) * 1973-09-08 1976-06-09 Anders Krahner Ab Mobile pallet and truck assembly for the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774419A1 (en) * 1995-11-17 1997-05-21 GE Polymer Logistics Tiltable portable pallet
DE29617184U1 (en) * 1996-10-02 1996-11-21 Chep Deutschland GmbH, 50996 Köln Pallet and towing device therefor
WO1999011544A1 (en) * 1997-08-29 1999-03-11 Jaederberg Sven Device at a load carrier
EP0972713A1 (en) * 1998-07-13 2000-01-19 Moldec Co., Ltd. Transportable storage container
AU782038B2 (en) * 2000-11-27 2005-06-30 Whincup, Bradley Douglas Mr Transport apparatus
GB2410238A (en) * 2004-01-20 2005-07-27 Linpac Mouldings Ltd Pallet with retractable wheels
GB2430926A (en) * 2005-10-06 2007-04-11 Linpac Materials Handling Ltd Pallet with retractable wheels
US8403344B2 (en) 2008-03-19 2013-03-26 Ds Smith Plastics Limited Dolly
CN107054835A (en) * 2017-03-19 2017-08-18 玉溪市新特材料有限公司 A kind of rotatable stacking tobacco leaf frame column supporting leg
CN111003319A (en) * 2019-11-25 2020-04-14 上海电机学院 Container storage and transportation logistics pallet
CN111039232A (en) * 2019-12-06 2020-04-21 杭州优智物联科技有限公司 Forklift device and method for quickly loading and unloading goods
CN111039232B (en) * 2019-12-06 2024-01-05 浙江优智物联科技有限公司 Forklift device and method for rapidly loading and unloading cargoes

Also Published As

Publication number Publication date
FR2646391A1 (en) 1990-11-02
FR2646391B1 (en) 1991-07-26

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