EP0892758B1 - Device for the transfer of a load by thrust and traction in the same plane - Google Patents

Device for the transfer of a load by thrust and traction in the same plane Download PDF

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Publication number
EP0892758B1
EP0892758B1 EP97918205A EP97918205A EP0892758B1 EP 0892758 B1 EP0892758 B1 EP 0892758B1 EP 97918205 A EP97918205 A EP 97918205A EP 97918205 A EP97918205 A EP 97918205A EP 0892758 B1 EP0892758 B1 EP 0892758B1
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EP
European Patent Office
Prior art keywords
load
arm
hinge
transfer
support
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP97918205A
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German (de)
French (fr)
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EP0892758A1 (en
Inventor
Pierre Marcelli
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Individual
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Individual
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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
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/19—Additional means for facilitating unloading
    • B66F9/195—Additional means for facilitating unloading for pushing the load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18832—Reciprocating or oscillating to or from alternating rotary including flexible drive connector [e.g., belt, chain, strand, etc.]
    • Y10T74/1884—Reciprocating or oscillating to or from alternating rotary including flexible drive connector [e.g., belt, chain, strand, etc.] with sprocket wheel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18992—Reciprocating to reciprocating

Definitions

  • the present invention relates to a device for transferring a load by pushing and traction in the same plane, called transfer plane, this device being used in particular for transferring a tool, a mold or a metallic mass, from a support mobile on a fixed support, said device being arranged to be mounted either on the mobile support, either on the fixed support, this device comprising at least one articulated handling and arranged to move in the same plane, called plane of articulation, this plane of articulation being substantially perpendicular to the plane of load transfer, this arm comprising at least one front element and one element rear, the rear element being coupled to said support by at least a first articulation, the front element being coupled on the one hand to the rear element by at least a second articulation and on the other hand to said load by hooking means provided at its free end, the two joints being arranged in said plane of articulation of the handling arm, this device also comprising means drive arranged to move said arm between two extreme positions, one first folded position in which the arm is retracted between the load and the support
  • the remoteness of the load results in the distance of its center of gravity from the center of gravity of the truck, the implications of this distance being as follows: the need to oversize the length of the platform or the forks of the trolley, reducing the maneuverability carriage and the decrease in the grip of the drive wheel. It is important to clarify that the capabilities of a material handling device, such as a forklift, are given by the value of the maximum transportable load and the distance from the center gravity of the load transported relative to the axis of the mast.
  • the mounting of transfer devices mentioned above therefore has the disadvantage of penalizing significantly the nominal capacities of the handling equipment, penalty that one could put a figure between 25 and 35%.
  • the present invention proposes to overcome these drawbacks by providing a device transfer of small footprint, low weight, and whose architecture allows to be easily integrated into the rear of the sliding apron, i.e. in the thickness of the mast of a forklift. Therefore, the capabilities of the material handling device are not affected in any way.
  • This transfer device also has a simple design and structure. It also represents a low investment and can be installed on any handling device or directly on a machine tool. Furthermore, the trajectory of this transfer device during transfer is stable and requires no external guidance or additional support.
  • the front and rear elements have a substantially length equal.
  • the means of training include at least one double-acting cylinder and the transmission means comprise at least one chain coupled simultaneously to the two joints by means of a first and second gear wheels.
  • the cylinder liner may be integral with the rear element and, in this case, the rod of the cylinder is integral with the chain, or, the rod of the cylinder can be integral with the element rear and, in this case, the cylinder liner is secured to the chain.
  • the shirt of the cylinder can also be secured to the support and, in this case, the cylinder rod is secured to the chain, or vice versa.
  • the first toothed wheel coupled to the first articulation is integral of said support and the second toothed wheel coupled to the second articulation is integral of the front element.
  • first toothed wheel has a number of teeth double that of the second toothed wheel, so as to angularly move said front elements and rear in a constant ratio substantially equal to 2.
  • the transmission means can comprise two chains arranged on the side and of the handling arm and, in this case, each joint is coupled to a pair of toothed wheels arranged on either side of said articulation.
  • the attachment means advantageously comprise at least two pins coaxial provided at the end of the front element of the handling arm and at least two hooking lugs fixed to said load and arranged to receive said loads pins.
  • the transfer device can advantageously be mounted in the mast at the rear of the sliding apron.
  • the transfer device may comprise at least two arms of handling, each associated with their own drive means, these arms being provided on either side of the mast and the means for hooking the load being common and connected to said handling arms.
  • the transfer device 1 is mounted on a mobile support, such as a forklift 50.
  • the forklift 50 comprises a rolling chassis 51, a substantially vertical mast 52 integral with the chassis 51, an apron 53 sliding along the mast 52, a plate horizontal or horizontal forks 54 integral with the deck 53 and a unit of motorization 55 of said chassis 51 and of said deck 53.
  • the transfer device 1 provided on this carriage is arranged to transfer, in the same plane, called subsequently plane transfer, a load 60 carried by the plate or the forks 54 of the carriage elevator 50 on a fixed support, such as a machine tool or a press 70, and Conversely.
  • the transfer plan is defined by a table 71 of the machine tool 70 in extension of which are positioned the plate or the forks 54 of the carriage elevator 50.
  • the end of the plate or forks 54 is provided with a rim arranged to lean on the table 71 of the machine tool 70.
  • the transfer device 1 comprises a handling arm 2 articulated in the same plane, hereinafter called the plane articulation, this arm being split into a rear element 3 and a front element 4.
  • the rear element 3 is coupled to the forklift 50, and in particular to the deck sliding 53, by a first articulation 5 provided on a support 5 'integral with said apron.
  • the front element 4 is coupled to the rear element 3 by a second articulation 6.
  • the free end 7 of the front element 4 is coupled to said load 60 by automatic or manual attachment means 8 constituting a third articulation 40 which moves in a plane parallel to the transfer plane.
  • the three articulations 5, 6 and 40 are arranged in said articulation plane of the arm of handling.
  • This third articulation 40 consists of two pins 41 coaxial provided on either side of the T-shaped end 7 of the front element 4. These pins 41 can be fixed or retractable in said end 7.
  • the load 60 is provided with hooking pieces 61 in form of angle iron open upwards and downwards and fixed to said load 60 by screws or other suitable fastening means.
  • the dropout or hanging up of the arm 2 at load 60 is obtained simply when lowering or lifting the deck 53 of the forklift 50. This movement from top to bottom and vice versa allows either the entry or the exit of the pins 41 in the hanging angles 61.
  • the attachment parts 61 provided on the load 60 may for example include inclined access ramps arranged to automatically retract the pins in the end 7 during attachment and / or unhooking, and housings interiors for receiving said pins in the extended position allowing locking hanging the load 60.
  • the handling arm 2 is arranged to move between two extreme positions, a first folded position in which it stores and merges into the structure of the mast 52 and the sliding apron 53 of said forklift 50 and a second unfolded position in which it is extended between said mast 52 and the load 60 transferred or to be transferred.
  • This handling arm 2 is specially designed so that its free end 7 can move, in a vacuum, without guide device, without fulcrum, following a substantially trajectory rectilinear in a plane substantially parallel to the transfer plane of the load, from one extreme position to another and vice versa.
  • the plan of articulation of the handling arm is substantially perpendicular to the plane of charge transfer.
  • FIG. 3 The extreme positions of the handling arm 2 are shown in Figure 3 in strong line for said first position, thin line for said second position and in short dashed lines for an intermediate position.
  • This handling arm 2 is associated with drive means 10 comprising a double-acting cylinder 11 hydraulic, pneumatic or electric.
  • This cylinder 11 can be provided on the element rear 3, as illustrated in FIGS. 3 and 4A, but can also be provided directly on the structure of the forklift 50 or on another fixed support point dissociated from said handling arm 2.
  • the jacket 11a of the jack 11 is integral with the rear element 3 and the rod 11b of this jack 11 is made integral with two parallel transmission chains 12, by means of a coupling bar 13.
  • FIG. 4A the jacket 11a of the jack 11 is integral with the rear element 3 and the rod 11b of this jack 11 is made integral with two parallel transmission chains 12, by means of a coupling bar 13.
  • the rod 11b of the jack 11 is integral with the rear element 3 and the jacket 11a of the jack 11 is made integral with the transmission chains 12 by the coupling bar 13.
  • Each chain 12 is designed to mesh simultaneously in a first toothed wheel 14 provided on the first articulation 5 and in a second gear 15 provided on the second articulation 6.
  • the first wheels teeth 14 are rigidly fixed to the mast 52 of the forklift 50 while the second toothed wheels 15 are rigidly fixed on the front element 4 of said arm handling.
  • Said first toothed wheels 14 have a number of teeth double that of said second toothed wheels 15.
  • This particular arrangement of the drive means 10 ensures the angular and synchronous displacement of the front 4 and rear 3 elements of the handling 2 by means of a single cylinder.
  • the chains of transmission 12 are driven simultaneously by the coupling bar 13 according to a rectilinear displacement.
  • the first toothed wheels 14 being fixed, the displacement straight lines 12 in collaboration with the fixed support point of the jack 11 generates a relative displacement of an angle ⁇ of said rear element 3, the axis of the second articulation 6 describing an arc of a circle whose center corresponds to the axis of the first joint 5.
  • the rectilinear movement of the chains 12 in collaboration with the fixed support point of the cylinder 11 generates a relative displacement by an angle ⁇ of said front element 4, in the opposite direction to the rear element 3, the free end 7 moving along a straight line parallel to said plane of transfer of charge.
  • the first and second toothed wheels 14, 15 having a constant ratio of 2, the front 4 and rear 3 elements of said handling arm move in the same report. Consequently, the angle ⁇ corresponding to the opening between the two front 4 and rear 3 elements is equal to 2 times the angle ⁇ corresponding to the travel of the rear element 3 with respect to a substantially vertical axis passing through the first articulation 5. It is thanks to this constant ratio of 2 that the trajectory of the free end 7 of the handling arm 1 is substantially straight.
  • the front 4 and rear 3 elements of the handling arm 2 are of substantially equal length. It is obvious that this characteristic did not mandatory as well as the constant ratio of 2 between the toothed wheels 14, 15.
  • the front 4 and rear 3 elements can have lengths different without calling into question the functioning of the handling 2.
  • the handling arm 2 as illustrated in Figures 1 to 4 corresponds to an optimal realization.
  • the pushing force it exerts on its free end 7 on load 60 is directly proportional to the ratio of torque exerted on the joints 5, 6 on the height of the arm. The more the arm unfolds, the more the height of the arm decreases, the more the pushing force increases. At startup, this force is minimal since the height of the arm is maximum.
  • the chains may have one or more rows.
  • the platform or the forks 54 of the forklift 50 are generally provided with rows of balls or bearings arranged in the direction of transfer. During the transport of the load 60, these balls or bearings (not shown) are retractable in the thickness of the plate or forks 54.
  • the attachment operation or detachment of the arm 2 with respect to the load 60 is carried out simultaneously with taking or depositing said load. The simultaneous combination of these functions is only possible thanks to the high vertical rigidity of the handling arm 2 obtained by the presence of the two transmission chains 12.
  • FIGS. 5A to 5C illustrate different possibilities of implementation of said transfer device 1 according to the invention.
  • the handling arm 2 is included in the structure of the lift truck 50, in particular behind the apron 53 and between the profiles of the mast 52, as in FIGS. 1 and 2. In this case, only the free end 7 provided with the hooking means 8 protrudes from the deck 53.
  • the transfer device 1 is doubled by two handling arms 2 provided on either side of the mast 52 at the rear of the deck 53. This construction can be considered for very large loads. In this case, the free ends 7 are coupled to common hooking means 8 to ensure movement regular charge.
  • the two handling arms 2 are associated with their own drive means whose control can be common to ensure a synchronous movement.
  • the handling arm 2 is mounted on a existing forklift 50, in front of the deck 53. Even in this configuration, the transfer device according to the invention is less bulky than known devices such as direct push cylinders, scissors or rigid chains.
  • the transfer device according to the invention achieves all set goals. Its installation being relatively simple, it is possible consider that it is directly mounted on a machine tool or press or on any other machine requiring a load transfer. In addition and as shown in the Figure 5B, its size being relatively small, it is conceivable to provide several transfer devices 1 in parallel and to couple them by means common attachment in the case of extremely heavy loads.
  • Ways 10 of the handling arm could include an electric motor or other equivalent means.
  • the chains 12 and the toothed wheels 14, 15 could be replaced by toothed belts or not and pulleys corresponding, or by a series of gear pinions, or other means equivalent.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Feeding Of Workpieces (AREA)
  • Specific Conveyance Elements (AREA)

Description

La présente invention concerne un dispositif de transfert d'une charge par poussée et traction dans un même plan, appelé plan de transfert, ce dispositif étant utilisé notamment pour transférer un outil, un moule ou une masse métallique, d'un support mobile sur un support fixe, ledit dispositif étant agencé pour être monté soit sur le support mobile, soit sur le support fixe, ce dispositif comportant au moins un bras de manutention articulé et agencé pour se déplacer dans un même plan, appelé plan d'articulation, ce plan d'articulation étant sensiblement perpendiculaire au plan de transfert de la charge, ce bras comprenant au moins un élément avant et un élément arrière, l'élément arrière étant couplé audit support par au moins une première articulation, l'élément avant étant couplé d'une part à l'élément arrière par au moins une seconde articulation et d'autre part à ladite charge par des moyens d'accrochage prévus à son extrémité libre, les deux articulations étant disposées dans ledit plan d'articulation du bras de manutention, ce dispositif comportant également des moyens d'entraínement agencés pour déplacer ledit bras entre deux positions extrêmes, une première position repliée dans laquelle le bras est escamoté entre la charge et le support, et, une seconde position dépliée dans laquelle le bras est étendu entre la charge et le support, et inversement.The present invention relates to a device for transferring a load by pushing and traction in the same plane, called transfer plane, this device being used in particular for transferring a tool, a mold or a metallic mass, from a support mobile on a fixed support, said device being arranged to be mounted either on the mobile support, either on the fixed support, this device comprising at least one articulated handling and arranged to move in the same plane, called plane of articulation, this plane of articulation being substantially perpendicular to the plane of load transfer, this arm comprising at least one front element and one element rear, the rear element being coupled to said support by at least a first articulation, the front element being coupled on the one hand to the rear element by at least a second articulation and on the other hand to said load by hooking means provided at its free end, the two joints being arranged in said plane of articulation of the handling arm, this device also comprising means drive arranged to move said arm between two extreme positions, one first folded position in which the arm is retracted between the load and the support, and, a second unfolded position in which the arm is extended between the load and support, and vice versa.

Dans l'industrie, on utilise d'une manière courante des chariots élévateurs ou des gerbeurs pour manutentionner des charges importantes. Plus spécifiquement, dans le domaine des machines outils ou des presses utilisées dans le découpage ou l'emboutissage de tôles métalliques, ou de toute autre matière, le changement de l'outil est effectué par des chariots élévateurs qui sont équipés d'un dispositif de transfert travaillant en poussée et en traction dans un même plan. Afin de transférer l'outil, du plateau ou des fourches du chariot élévateur sur la table ou le plateau d'une machine outil ou d'une presse, et réciproquement, les dispositifs de transfert connus permettant de pousser et de tirer la charge sont installés entre l'outil et le tablier coulissant sur le mât du chariot. Ces dispositifs de transfert comportent généralement un vérin à double effet de poussée directe, un système à ciseaux multiplicateurs ou des chaínes travaillant par poussée et traction. Néanmoins, ces dispositifs présentent tous l'inconvénient d'être encombrants notamment dans le sens du transfert, ce qui éloigne la charge du mât dudit chariot. L'éloignement de la charge a pour conséquence l'éloignement de son centre de gravité par rapport au centre de gravité du chariot, les incidences de cet éloignement étant les suivantes : la nécessité de surdimensionner la longueur du plateau ou des fourches du chariot, la réduction de la maniabilité du chariot et la diminution de l'adhérence de la roue motrice. Il est important de préciser que les capacités d'un appareil de manutention, tel qu'un chariot élévateur, sont données par la valeur de la charge maximale transportable et l'éloignement du centre de gravité de la charge transportée par rapport à l'axe du mât. Le montage des dispositifs de transfert évoqués ci-dessus a donc pour inconvénient de pénaliser de manière importante les capacités nominales des appareils de manutention, pénalité que l'on pourrait chiffrer entre 25 et 35 %.In industry, forklifts or stackers for handling large loads. More specifically, in the machine tools or presses used in cutting or stamping metal sheets, or any other material, changing the tool is carried out by forklifts which are equipped with a transfer device working in push and pull in the same plane. In order to transfer the tool, forklift table or forks on the table or table of a machine tool or press, and vice versa, known transfer devices allowing push and pull load are installed between the tool and the sliding apron on the carriage mast. These transfer devices generally include a cylinder with double direct thrust effect, a scissor multiplier system or chains working by push and pull. However, these devices all have the disadvantage of being bulky especially in the direction of transfer, which removes the load of the mast of said carriage. The remoteness of the load results in the distance of its center of gravity from the center of gravity of the truck, the implications of this distance being as follows: the need to oversize the length of the platform or the forks of the trolley, reducing the maneuverability carriage and the decrease in the grip of the drive wheel. It is important to clarify that the capabilities of a material handling device, such as a forklift, are given by the value of the maximum transportable load and the distance from the center gravity of the load transported relative to the axis of the mast. The mounting of transfer devices mentioned above therefore has the disadvantage of penalizing significantly the nominal capacities of the handling equipment, penalty that one could put a figure between 25 and 35%.

Certains dispositifs de transfert ont été conçus pour essayer de résoudre ces problèmes en utilisant un bras articulé de poussée et de traction dans un même plan. Dans la publication US-A-2 672 249, le bras est constitué de deux parties distinctes déplacées par un vérin central qui entraíne des crémaillères verticales engrènant des secteurs dentés prévus à l'extrémité correspondante des deux parties du bras. Ce système d'entraínement est relativement encombrant, n'est pas escamotable dans l'épaisseur du mât et nécessite d'avoir deux points d'appui de part et d'autre du bras, un premier du côté du mât et un second du côté de la charge. Le système d'accrochage de la charge à l'extrémité du bras est complexe et peu rapide à mettre en oeuvre. De plus, le nombre de leviers et d'articulations rend ce dispositif très cher et complexe à mettre en oeuvre. Dans la publication DE-A-17 81 367, le bras est commandé par un vérin dont le corps est solidaire de la partie arrière, la tige est solidaire de la partie avant du bras et le bras est doublé par des tiges complémentaires articulées pour le guider dans son déplacement. Même s'il semble plus simple que le précédent, ce système d'entraínement présente sensiblement les mêmes inconvénients. De plus, ce bras n'est pas du tout rigide dans l'espace et nécessite de reposer son extrémité libre sur un plan d'appui constitué par un plateau horizontal. La publication DE-A-1 233 557 décrit un châssis relevable au moyen d'un vérin couplé audit châssis et qui actionne une crémaillère engrénant une roue dentée à l'extrémité d'une béquille articulée à un appareil roulant, comportant ce châssis. Dans cette publication, on cherche à relever un châssis d'une position horizontale à une position sensiblement verticale, l'extrémité du châssis décrivant ainsi une trajectoire sensiblement circulaire, ce qui ne correspond pas à l'objet de la présente invention. Some transfer devices have been designed to try to resolve these problems using an articulated push and pull arm in one plane. In publication US-A-2 672 249, the arm is made up of two distinct parts moved by a central cylinder which drives vertical racks meshing toothed sectors provided at the corresponding end of the two parts of the arm. This drive system is relatively bulky, is not retractable in the thickness of the mast and requires two support points on each side of the arm, a first on the side of the mast and a second on the side of the load. The system for attaching the load to the end of the arm is complex and not very quick to set up artwork. In addition, the number of levers and articulations makes this device very expensive and complex to implement. In publication DE-A-17 81 367, the arm is controlled by a jack whose body is integral with the rear part, the rod is secured to the front part of the arm and the arm is lined with complementary rods articulated to guide it in its movement. Even if it seems simpler than the previous, this drive system has substantially the same drawbacks. In addition, this arm is not at all rigid in space and requires resting its free end on a support surface consisting of a horizontal plate. The publication DE-A-1 233 557 describes a lifting frame by means of a jack coupled to said frame and which actuates a rack meshing a toothed wheel at the end of a crutch articulated to a rolling device, comprising this chassis. In this publication, we seeks to raise a chassis from a horizontal position to a substantially position vertical, the end of the chassis thus describing a substantially circular trajectory, which does not correspond to the object of the present invention.

La présente invention se propose de pallier ces inconvénients en réalisant un dispositif de transfert de faible encombrement, de faible poids, et dont l'architecture lui permet de s'intégrer aisément à l'arrière du tablier coulissant, c'est-à-dire dans l'épaisseur du mât d'un chariot élévateur. Par conséquent, les capacités de l'appareil de manutention ne sont aucunement affectées. Ce dispositif de transfert présente en plus une conception et une structure simples. Il représente de surcroít un faible investissement et peut être installé sur tout appareil de manutention ou directement sur une machine outil. Par ailleurs, la trajectoire de ce dispositif de transfert en cours de transfert est stable et ne nécessite aucun guidage extérieur, ni d'appui supplémentaire. The present invention proposes to overcome these drawbacks by providing a device transfer of small footprint, low weight, and whose architecture allows to be easily integrated into the rear of the sliding apron, i.e. in the thickness of the mast of a forklift. Therefore, the capabilities of the material handling device are not affected in any way. This transfer device also has a simple design and structure. It also represents a low investment and can be installed on any handling device or directly on a machine tool. Furthermore, the trajectory of this transfer device during transfer is stable and requires no external guidance or additional support.

Ce but est atteint par un dispositif de transfert tel que défini dans la revendication 1.This object is achieved by a transfer device as defined in claim 1.

Les éléments avant et arrière présentent une longueur sensiblement égale.The front and rear elements have a substantially length equal.

Les moyens d'entraínement comportent au moins un vérin à double effet et les moyens de transmission comportent au moins une chaíne couplée simultanément aux deux articulations au moyen respectivement d'une première et d'une seconde roues dentées.The means of training include at least one double-acting cylinder and the transmission means comprise at least one chain coupled simultaneously to the two joints by means of a first and second gear wheels.

La chemise du vérin peut être solidaire de l'élément arrière et, dans ce cas, la tige du vérin est solidaire de la chaíne, ou, la tige du vérin peut être solidaire de l'élément arrière et, dans ce cas, la chemise du vérin est solidaire de la chaíne. La chemise du vérin peut également être solidaire du support et, dans ce cas, la tige du vérin est solidaire de la chaíne, ou inversement.The cylinder liner may be integral with the rear element and, in this case, the rod of the cylinder is integral with the chain, or, the rod of the cylinder can be integral with the element rear and, in this case, the cylinder liner is secured to the chain. The shirt of the cylinder can also be secured to the support and, in this case, the cylinder rod is secured to the chain, or vice versa.

La première roue dentée couplée à la première articulation est solidaire dudit support et la seconde roue dentée couplée à la seconde articulation est solidaire de l'élément avant.The first toothed wheel coupled to the first articulation is integral of said support and the second toothed wheel coupled to the second articulation is integral of the front element.

De plus, la première roue dentée comporte un nombre de dents double de celui de la seconde roue dentée, de manière à déplacer angulairement lesdits éléments avant et arrière dans un rapport constant sensiblement égal à 2.In addition, the first toothed wheel has a number of teeth double that of the second toothed wheel, so as to angularly move said front elements and rear in a constant ratio substantially equal to 2.

Les moyens de transmission peuvent comporter deux chaínes disposées de part et d'autre du bras de manutention et, dans ce cas, chaque articulation est couplée à une paire de roues dentées disposées de part et d'autre de ladite articulation. The transmission means can comprise two chains arranged on the side and of the handling arm and, in this case, each joint is coupled to a pair of toothed wheels arranged on either side of said articulation.

Les moyens d'accrochage comportent avantageusement au moins deux tourillons coaxiaux prévus à l'extrémité de l'élément avant du bras de manutention et au moins deux pattes d'accrochage fixées à ladite charge et agencées pour recevoir lesdits tourillons.The attachment means advantageously comprise at least two pins coaxial provided at the end of the front element of the handling arm and at least two hooking lugs fixed to said load and arranged to receive said loads pins.

Dans le cas où le support mobile est un chariot élévateur pourvu d'un mât, d'un tablier coulissant le long de ce mât et d'un plateau ou de fourches solidaires dudit tablier, le dispositif de transfert peut être avantageusement monté dans le mât à l'arrière du tablier coulissant.In the case where the mobile support is a forklift fitted with a mast, an apron sliding along this mast and a plate or forks integral with said deck, the transfer device can advantageously be mounted in the mast at the rear of the sliding apron.

Par ailleurs, le dispositif de transfert peut comporter au moins deux bras de manutention, associés chacun à leurs propres moyens d'entraínement, ces bras étant prévus de part et d'autre du mât et les moyens d'accrochage de la charge étant communs et reliés auxdits bras de manutention.Furthermore, the transfer device may comprise at least two arms of handling, each associated with their own drive means, these arms being provided on either side of the mast and the means for hooking the load being common and connected to said handling arms.

La présente invention et ses avantages apparaítront mieux dans la description suivante d'un exemple de réalisation, en référence aux dessins annexés, dans lesquels :

  • la figure 1 représente schématiquement, en vue de profil, un chariot élévateur portant une charge et équipé du dispositif de transfert selon l'invention, en position repliée,
  • la figure 2 est une vue similaire à la figure 1, le dispositif de transfert étant en position dépliée et la charge étant transférée sur un support fixe,
  • la figure 3 est une vue de profil du dispositif de transfert selon l'invention, représenté dans trois positions successives,
  • la figure 4A est une vue de dessus du dispositif de transfert de la figure 3,
  • la figure 4B est une vue partielle similaire à celle de la figure 4A d'une variante de réalisation du dispositif de transfert selon l'invention, et
  • les figures 5A, 5B et 5C représentent schématiquement, en coupe et vue de dessus, trois exemples de montage du dispositif de transfert selon l'invention sur un chariot élévateur.
The present invention and its advantages will appear better in the following description of an exemplary embodiment, with reference to the appended drawings, in which:
  • FIG. 1 schematically represents, in profile view, a forklift carrying a load and equipped with the transfer device according to the invention, in the folded position,
  • FIG. 2 is a view similar to FIG. 1, the transfer device being in the unfolded position and the load being transferred to a fixed support,
  • FIG. 3 is a side view of the transfer device according to the invention, shown in three successive positions,
  • FIG. 4A is a top view of the transfer device of FIG. 3,
  • FIG. 4B is a partial view similar to that of FIG. 4A of an alternative embodiment of the transfer device according to the invention, and
  • Figures 5A, 5B and 5C schematically show, in section and top view, three examples of mounting the transfer device according to the invention on a forklift.

En référence aux figures 1 et 2, le dispositif de transfert 1 selon l'invention est monté sur un support mobile, tel qu'un chariot élévateur 50. D'une manière connue, le chariot élévateur 50 comporte un châssis roulant 51, un mât 52 sensiblement vertical solidaire du châssis 51, un tablier 53 coulissant le long du mât 52, un plateau horizontal ou des fourches horizontales 54 solidaires du tablier 53 et une unité de motorisation 55 dudit châssis 51 et dudit tablier 53. Le dispositif de transfert 1 prévu sur ce chariot est agencé pour transférer, dans un même plan, appelé par la suite plan de transfert, une charge 60 portée par le plateau ou les fourches 54 du chariot élévateur 50 sur un support fixe, tel qu'une machine outil ou une presse 70, et inversement. Le plan de transfert est défini par une table 71 de la machine outil 70 en prolongement de laquelle sont positionnés le plateau ou les fourches 54 du chariot élévateur 50. Pour garantir la stabilité du plan pendant le transfert de la charge 60, l'extrémité du plateau ou des fourches 54 est pourvue d'un rebord agencé pour prendre appui sur la table 71 de la machine outil 70.Referring to Figures 1 and 2, the transfer device 1 according to the invention is mounted on a mobile support, such as a forklift 50. In a known manner, the forklift 50 comprises a rolling chassis 51, a substantially vertical mast 52 integral with the chassis 51, an apron 53 sliding along the mast 52, a plate horizontal or horizontal forks 54 integral with the deck 53 and a unit of motorization 55 of said chassis 51 and of said deck 53. The transfer device 1 provided on this carriage is arranged to transfer, in the same plane, called subsequently plane transfer, a load 60 carried by the plate or the forks 54 of the carriage elevator 50 on a fixed support, such as a machine tool or a press 70, and Conversely. The transfer plan is defined by a table 71 of the machine tool 70 in extension of which are positioned the plate or the forks 54 of the carriage elevator 50. To guarantee the stability of the plane during the transfer of the load 60, the end of the plate or forks 54 is provided with a rim arranged to lean on the table 71 of the machine tool 70.

En référence également aux figures 3, 4A et 4B, le dispositif de transfert 1 comporte un bras de manutention 2 articulé dans un même plan, appelé par la suite plan d'articulation, ce bras étant scindé en un élément arrière 3 et un élément avant 4. L'élément arrière 3 est couplé au chariot élévateur 50, et notamment au tablier coulissant 53, par une première articulation 5 prévue sur un support 5' solidaire dudit tablier. L'élément avant 4 est couplé à l'élément arrière 3 par une seconde articulation 6. L'extrémité libre 7 de l'élément avant 4 est couplée à ladite charge 60 par des moyens d'accrochage automatiques ou manuels 8 constituant une troisième articulation 40 qui se déplace dans un plan parallèle au plan de transfert. Les trois articulations 5, 6 et 40 sont disposées dans ledit plan d'articulation du bras de manutention. Cette troisième articulation 40 est constituée de deux tourillons 41 coaxiaux prévus de part et d'autre de l'extrémité 7 en forme de T de l'élément avant 4. Ces tourillons 41 peuvent être fixes ou escamotables dans ladite extrémité 7. Dans le cas de tourillons 41 fixes, la charge 60 est pourvue de pièces d'accrochage 61 en forme de cornière ouverte vers le haut et vers le bas et fixées à ladite charge 60 par des vis ou d'autres moyens de fixation appropriés. Le décrochage ou l'accrochage du bras 2 à la charge 60 est obtenu simplement lors de la descente ou de la levée du tablier 53 du chariot élévateur 50. Ce mouvement de haut en bas et inversement permet soit l'entrée, soit la sortie des tourillons 41 dans les cornières d'accrochage 61. Dans le cas de tourillons 41 escamotables dans l'extrémité 7 du bras de manutention 2, les pièces d'accrochage 61 prévues sur la charge 60 peuvent comporter par exemple des rampes d'accès inclinées agencées pour escamoter automatiquement les tourillons dans l'extrémité 7 lors de l'accrochage et/ou du décrochage, et des logements intérieurs pour recevoir lesdits tourillons en position sortie permettant de verrouiller l'accrochage de la charge 60.With reference also to FIGS. 3, 4A and 4B, the transfer device 1 comprises a handling arm 2 articulated in the same plane, hereinafter called the plane articulation, this arm being split into a rear element 3 and a front element 4. The rear element 3 is coupled to the forklift 50, and in particular to the deck sliding 53, by a first articulation 5 provided on a support 5 'integral with said apron. The front element 4 is coupled to the rear element 3 by a second articulation 6. The free end 7 of the front element 4 is coupled to said load 60 by automatic or manual attachment means 8 constituting a third articulation 40 which moves in a plane parallel to the transfer plane. The three articulations 5, 6 and 40 are arranged in said articulation plane of the arm of handling. This third articulation 40 consists of two pins 41 coaxial provided on either side of the T-shaped end 7 of the front element 4. These pins 41 can be fixed or retractable in said end 7. In the in the case of fixed journals 41, the load 60 is provided with hooking pieces 61 in form of angle iron open upwards and downwards and fixed to said load 60 by screws or other suitable fastening means. The dropout or hanging up of the arm 2 at load 60 is obtained simply when lowering or lifting the deck 53 of the forklift 50. This movement from top to bottom and vice versa allows either the entry or the exit of the pins 41 in the hanging angles 61. In the case of pins 41 retractable in the end 7 of the handling arm 2, the attachment parts 61 provided on the load 60 may for example include inclined access ramps arranged to automatically retract the pins in the end 7 during attachment and / or unhooking, and housings interiors for receiving said pins in the extended position allowing locking hanging the load 60.

Il apparaít clairement sur ces figures, que le bras de manutention 2 est agencé pour se déplacer entre deux positions extrêmes, une première position repliée dans laquelle il se range et se confond dans la structure du mât 52 et du tablier coulissant 53 dudit chariot élévateur 50 et une seconde position dépliée dans laquelle il est étendu entre ledit mât 52 et la charge 60 transférée ou à transférer. Ce bras de manutention 2 est spécialement conçu pour que son extrémité libre 7 puisse se déplacer, dans le vide, sans dispositif de guidage, sans point d'appui, suivant une trajectoire sensiblement rectiligne comprise dans un plan sensiblement parallèle au plan de transfert de la charge, d'une position extrême à l'autre et inversement. Dans l'exemple illustré, le plan d'articulation du bras de manutention est sensiblement perpendiculaire au plan de transfert de la charge.It appears clearly in these figures, that the handling arm 2 is arranged to move between two extreme positions, a first folded position in which it stores and merges into the structure of the mast 52 and the sliding apron 53 of said forklift 50 and a second unfolded position in which it is extended between said mast 52 and the load 60 transferred or to be transferred. This handling arm 2 is specially designed so that its free end 7 can move, in a vacuum, without guide device, without fulcrum, following a substantially trajectory rectilinear in a plane substantially parallel to the transfer plane of the load, from one extreme position to another and vice versa. In the example shown, the plan of articulation of the handling arm is substantially perpendicular to the plane of charge transfer.

Les positions extrêmes du bras de manutention 2 sont représentées par la figure 3 en trait fort pour ladite première position, en trait fin pour ladite seconde position et en traits interrompus courts pour une position intermédiaire. Ce bras de manutention 2 est associé à des moyens d'entraínement 10 comportant un vérin à double effet 11 hydraulique, pneumatique ou électrique. Ce vérin 11 peut être prévu sur l'élément arrière 3, comme illustré par les figures 3 et 4A, mais peut être également prévu directement sur la structure du chariot élévateur 50 ou sur un autre point d'appui fixe dissocié dudit bras de manutention 2. Dans la figure 4A, la chemise 11a du vérin 11 est solidaire de l'élément arrière 3 et la tige 11b de ce vérin 11 est rendue solidaire de deux chaínes de transmission 12 parallèles, au moyen d'une barre de couplage 13. A l'inverse, dans la figure 4B, la tige 11b du vérin 11 est solidaire de l'élément arrière 3 et la chemise 11a du vérin 11 est rendue solidaire des chaínes de transmission 12 par la barre de couplage 13. Chaque chaíne 12 est prévue pour engrener simultanément dans une première roue dentée 14 prévue sur la première articulation 5 et dans une seconde roue dentée 15 prévue sur la seconde articulation 6. Les premières roues dentées 14 sont fixées rigidement sur le mât 52 du chariot élévateur 50 tandis que les secondes roues dentées 15 sont fixées rigidement sur l'élément avant 4 dudit bras de manutention. Lesdites premières roues dentées 14 présentent un nombre de dents double de celui desdites secondes roues dentées 15.The extreme positions of the handling arm 2 are shown in Figure 3 in strong line for said first position, thin line for said second position and in short dashed lines for an intermediate position. This handling arm 2 is associated with drive means 10 comprising a double-acting cylinder 11 hydraulic, pneumatic or electric. This cylinder 11 can be provided on the element rear 3, as illustrated in FIGS. 3 and 4A, but can also be provided directly on the structure of the forklift 50 or on another fixed support point dissociated from said handling arm 2. In FIG. 4A, the jacket 11a of the jack 11 is integral with the rear element 3 and the rod 11b of this jack 11 is made integral with two parallel transmission chains 12, by means of a coupling bar 13. A conversely, in FIG. 4B, the rod 11b of the jack 11 is integral with the rear element 3 and the jacket 11a of the jack 11 is made integral with the transmission chains 12 by the coupling bar 13. Each chain 12 is designed to mesh simultaneously in a first toothed wheel 14 provided on the first articulation 5 and in a second gear 15 provided on the second articulation 6. The first wheels teeth 14 are rigidly fixed to the mast 52 of the forklift 50 while the second toothed wheels 15 are rigidly fixed on the front element 4 of said arm handling. Said first toothed wheels 14 have a number of teeth double that of said second toothed wheels 15.

Cet agencement particulier des moyens d'entraínement 10 permet d'assurer le déplacement angulaire et en synchronisme des éléments avant 4 et arrière 3 du bras de manutention 2 au moyen d'un seul vérin. Quand la tige du vérin 11 sort, les chaínes de transmission 12 sont entraínées simultanément par la barre de couplage 13 suivant un déplacement rectiligne. Les premières roues dentées 14 étant fixes, le déplacement rectiligne des chaínes 12 en collaboration avec le point d'appui fixe du vérin 11 engendre un déplacement relatif d'un angle α dudit élément arrière 3, l'axe de la seconde articulation 6 décrivant un arc de cercle dont le centre correspond à l'axe de la première articulation 5. Simultanément, le déplacement rectiligne des chaínes 12 en collaboration avec le point d'appui fixe du vérin 11 engendre un déplacement relatif d'un angle β dudit élément avant 4, dans le sens inverse à l'élément arrière 3, l'extrémité libre 7 se déplaçant le long d'une droite parallèle audit plan de transfert de charge. Les premières et secondes roues dentées 14, 15 ayant un rapport constant de 2, les éléments avant 4 et arrière 3 dudit bras de manutention se déplacent dans le même rapport. Par conséquent, l'angle β correspondant à l'ouverture entre les deux éléments avant 4 et arrière 3 est égal à 2 fois l'angle α correspondant au débattement de l'élément arrière 3 par rapport à un axe sensiblement vertical passant par la première articulation 5. C'est grâce à ce rapport constant de 2 que la trajectoire de l'extrémité libre 7 du bras de manutention 1 est sensiblement rectiligne.This particular arrangement of the drive means 10 ensures the angular and synchronous displacement of the front 4 and rear 3 elements of the handling 2 by means of a single cylinder. When the rod of the cylinder 11 comes out, the chains of transmission 12 are driven simultaneously by the coupling bar 13 according to a rectilinear displacement. The first toothed wheels 14 being fixed, the displacement straight lines 12 in collaboration with the fixed support point of the jack 11 generates a relative displacement of an angle α of said rear element 3, the axis of the second articulation 6 describing an arc of a circle whose center corresponds to the axis of the first joint 5. Simultaneously, the rectilinear movement of the chains 12 in collaboration with the fixed support point of the cylinder 11 generates a relative displacement by an angle β of said front element 4, in the opposite direction to the rear element 3, the free end 7 moving along a straight line parallel to said plane of transfer of charge. The first and second toothed wheels 14, 15 having a constant ratio of 2, the front 4 and rear 3 elements of said handling arm move in the same report. Consequently, the angle β corresponding to the opening between the two front 4 and rear 3 elements is equal to 2 times the angle α corresponding to the travel of the rear element 3 with respect to a substantially vertical axis passing through the first articulation 5. It is thanks to this constant ratio of 2 that the trajectory of the free end 7 of the handling arm 1 is substantially straight.

Dans l'exemple représenté, les éléments avant 4 et arrière 3 du bras de manutention 2 sont de longueurs sensiblement égales. Il est évident que cette caractéristique n'a pas un caractère obligatoire au même titre que le rapport constant de 2 existant entre les roues dentées 14, 15. Les éléments avant 4 et arrière 3 peuvent avoir des longueurs différentes sans pour autant remettre en cause le fonctionnement du bras de manutention 2. Le bras de manutention 2 tel qu'illustré dans les figures 1 à 4 correspond à une réalisation optimale. La force de poussée qu'il exerce à son extrémité libre 7 sur la charge 60 est directement proportionnelle au rapport du couple exercé sur les articulations 5, 6 sur la hauteur du bras. Plus le bras se déplie, plus la hauteur du bras diminue et plus la force de poussée croít. Au démarrage, cette force est minimale puisque la hauteur du bras est maximale. Il convient alors de dimensionner en conséquence les roues dentées, les chaínes, le vérin, de même que sa pression d'alimentation, afin que cette force minimale soit suffisante pour déplacer ladite charge 60. Les chaínes peuvent comporter une ou plusieurs rangées. Dans le but de faciliter le transfert de la charge 60 en limitant notamment les efforts de poussée ou de traction nécessaires, le plateau ou les fourches 54 du chariot élévateur 50 sont généralement pourvus de rangées de billes ou de roulements disposés dans le sens du transfert. Pendant le transport de la charge 60, ces billes ou roulements (non représentés) sont escamotables dans l'épaisseur du plateau ou des fourches 54. Par ailleurs, grâce à la configuration des moyens d'accrochage 8, l'opération d'accrochage ou de décrochage du bras 2 par rapport à la charge 60 s'effectue simultanément avec la prise ou la dépose de ladite charge. La conjugaison simultanée de ces fonctions n'est rendue possible que grâce à la grande rigidité verticale du bras de manutention 2 obtenue par la présence des deux chaínes de transmission 12.In the example shown, the front 4 and rear 3 elements of the handling arm 2 are of substantially equal length. It is obvious that this characteristic did not mandatory as well as the constant ratio of 2 between the toothed wheels 14, 15. The front 4 and rear 3 elements can have lengths different without calling into question the functioning of the handling 2. The handling arm 2 as illustrated in Figures 1 to 4 corresponds to an optimal realization. The pushing force it exerts on its free end 7 on load 60 is directly proportional to the ratio of torque exerted on the joints 5, 6 on the height of the arm. The more the arm unfolds, the more the height of the arm decreases, the more the pushing force increases. At startup, this force is minimal since the height of the arm is maximum. It is therefore advisable to dimension the gear wheels, the chains, the actuator accordingly, as well as its supply pressure, so that this minimum force is sufficient to move said load 60. The chains may have one or more rows. In order to to facilitate the transfer of the load 60 by limiting in particular the thrust forces or required traction, the platform or the forks 54 of the forklift 50 are generally provided with rows of balls or bearings arranged in the direction of transfer. During the transport of the load 60, these balls or bearings (not shown) are retractable in the thickness of the plate or forks 54. By elsewhere, thanks to the configuration of the attachment means 8, the attachment operation or detachment of the arm 2 with respect to the load 60 is carried out simultaneously with taking or depositing said load. The simultaneous combination of these functions is only possible thanks to the high vertical rigidity of the handling arm 2 obtained by the presence of the two transmission chains 12.

Les figures 5A à 5C illustrent différentes possibilités de mise en oeuvre dudit dispositif de transfert 1 selon l'invention. Dans la figure 5A, le bras de manutention 2 est inclus dans la structure du chariot élévateur 50, notamment à l'arrière du tablier 53 et entre les profilés du mât 52, comme dans les figures 1 et 2. Dans ce cas, seule l'extrémité libre 7 munie des moyens d'accrochage 8 dépasse du tablier 53. Dans la figure 5B, le dispositif de transfert 1 est doublé par deux bras de manutention 2 prévus de part et d'autre du mât 52 à l'arrière du tablier 53. Cette construction peut être envisagée pour des charges très importantes. Dans ce cas, les extrémités libres 7 sont couplées à des moyens d'accrochage 8 communs pour assurer un déplacement régulier de la charge. Les deux bras de manutention 2 sont associés à leurs propres moyens d'entraínement dont la commande peut être commune pour assurer un déplacement synchrone. Dans la figure 5C, le bras de manutention 2 est monté sur un chariot élévateur 50 existant, à l'avant du tablier 53. Même dans cette configuration, le dispositif de transfert selon l'invention est moins encombrant que les dispositifs connus tels que les vérins à poussée directe, les ciseaux ou les chaínes rigides.FIGS. 5A to 5C illustrate different possibilities of implementation of said transfer device 1 according to the invention. In FIG. 5A, the handling arm 2 is included in the structure of the lift truck 50, in particular behind the apron 53 and between the profiles of the mast 52, as in FIGS. 1 and 2. In this case, only the free end 7 provided with the hooking means 8 protrudes from the deck 53. In the FIG. 5B, the transfer device 1 is doubled by two handling arms 2 provided on either side of the mast 52 at the rear of the deck 53. This construction can be considered for very large loads. In this case, the free ends 7 are coupled to common hooking means 8 to ensure movement regular charge. The two handling arms 2 are associated with their own drive means whose control can be common to ensure a synchronous movement. In FIG. 5C, the handling arm 2 is mounted on a existing forklift 50, in front of the deck 53. Even in this configuration, the transfer device according to the invention is less bulky than known devices such as direct push cylinders, scissors or rigid chains.

Il ressort clairement de cette description que le dispositif de transfert selon l'invention atteint tous les buts fixés. Sa mise en place étant relativement simple, il est possible d'envisager qu'il soit directement monté sur une machine outil ou une presse ou sur toute autre machine nécessitant un transfert de charge. De plus et comme le montre la figure 5B, son encombrement étant relativement faible, il est envisageable de prévoir plusieurs dispositifs de transfert 1 en parallèle et de les coupler par des moyens d'accrochage communs dans le cas de charges extrêmement lourdes.It is clear from this description that the transfer device according to the invention achieves all set goals. Its installation being relatively simple, it is possible consider that it is directly mounted on a machine tool or press or on any other machine requiring a load transfer. In addition and as shown in the Figure 5B, its size being relatively small, it is conceivable to provide several transfer devices 1 in parallel and to couple them by means common attachment in the case of extremely heavy loads.

La présente invention n'est pas limitée aux exemples de réalisation décrits mais s'étend à toute modification et variante évidente pour un homme du métier. Les moyens d'entraínement 10 du bras de manutention pourraient comporter un moteur électrique ou d'autres moyens équivalents. De même, les chaínes 12 et les roues dentées 14, 15 pourraient être remplacées par des courroies crantées ou non et des poulies correspondantes, ou par une série de pignons d'engrenage, ou d'autres moyens équivalents.The present invention is not limited to the embodiments described but extends any modification and variant obvious to a person skilled in the art. Ways 10 of the handling arm could include an electric motor or other equivalent means. Similarly, the chains 12 and the toothed wheels 14, 15 could be replaced by toothed belts or not and pulleys corresponding, or by a series of gear pinions, or other means equivalent.

Claims (7)

  1. Device (1) for transferring a load (60) by thrust and traction in the same plane, called the transfer plane, this device being used in particular to transfer a tool, a mold, or a metal mass, from a moving support (50) onto a stationary support (70) and vice-versa, said device being designed to be mounted either on said moving support or on said stationary support, this device comprising at least one hinged handling arm (2) designed to move in the same plane, called the hinge plane, this hinge plane being substantially perpendicular to the load (60) transfer plane, this arm comprising at least one front member (4) and one rear member (3), the front (4) and rear (3) members presenting a substantially equal length, the rear member (3) being coupled to said support (50, 70) by at least one first hinge (5), the front member (4) being coupled on the one hand to the rear member (3) by at least one second hinge (6) and on the other hand to said load (60) by hooking means (8) provided at its free end (7), forming a third hinge (40), the three hinges (5, 6, 40) being arranged in said hinge plane of the handling arm (2), this device also comprising driving means (10) designed to move said arm (2) between two end positions, a first folded-up position in which the arm is retracted between the load and the support, and a second unfolded position in which the arm is extended between the load and the support and reciprocally, characterized in that the driving means (10) comprise at least one double-action jack (11) combined with said rear member (3) and means of transmission (12, 14, 15), these means of transmission comprising at least one chain (12) coupled simultaneously to the two hinges (5, 6) respectively by means of a first (14) and a second (15) toothed wheels, the first toothed wheel (14) being securely fixed to said stationary support (50, 70) and the second toothed wheel (15) being securely fixed to the front member (4), the first toothed wheel (14) comprising twice as many teeth as the second toothed wheel (15), so that it moves said front member (4) and rear member (3) angularly in a constant ratio which is substantially equal to 2.
  2. Device according to claim 1, characterized in that the jack's (11) casing (11a) is securely fixed to the rear member (3) and the jack's (11) rod (11b) is securely fixed to said chain (12).
  3. Device according to claim 1, characterized in that the jack's (11) rod (11b) is securely fixed to said rear member (3) and, the jack's (11) casing (11a) is securely fixed to said chain (12).
  4. Device according to claim 1, characterized in that the transmission means comprise two chains (12) located on either side of the handling arm (2) and in that each hinge (5, 6) is coupled to a pair of toothed wheels (14, 15) located on either side of said hinge
  5. Device according to claim 1, characterized in that the hooking means (8) comprise at least two coaxial journals (41) provided at the end (7) of the handling arm's (2) front member (4) and at least two hooking lugs (61) fixed to said load (60) designed to receive said journals (41).
  6. Device according to claim 1, characterized in that, in the case of the moving support being a lift truck (50) provided with a mast (52), a push plate (53) sliding along this mast and a tray and forks (54) securely fixed to said push plate, the transfer device (1) is mounted in the mast (52) at the rear of the sliding push plate (53).
  7. Device according to claim 6, characterized in that it comprises at least two handling arms (2), each associated with their own driving means (10), these arms being provided on either side of the mast (52) and the means of hooking (8) the load (60) being common and connected to said handling arms.
EP97918205A 1996-04-12 1997-04-11 Device for the transfer of a load by thrust and traction in the same plane Expired - Lifetime EP0892758B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9604770A FR2747381B1 (en) 1996-04-12 1996-04-12 DEVICE FOR TRANSFERING A LOAD BY PUSHING AND TRACTION IN THE SAME PLANE
FR9604770 1996-04-12
PCT/FR1997/000645 WO1997038934A1 (en) 1996-04-12 1997-04-11 Device for the transfer of a load by thrust and traction in the same plane

Publications (2)

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EP0892758A1 EP0892758A1 (en) 1999-01-27
EP0892758B1 true EP0892758B1 (en) 2000-07-12

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EP (1) EP0892758B1 (en)
CA (1) CA2251018C (en)
DE (1) DE69702512T2 (en)
FR (1) FR2747381B1 (en)
WO (1) WO1997038934A1 (en)

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Also Published As

Publication number Publication date
FR2747381B1 (en) 1998-06-19
DE69702512D1 (en) 2000-08-17
FR2747381A1 (en) 1997-10-17
CA2251018C (en) 2004-02-03
CA2251018A1 (en) 1997-10-23
DE69702512T2 (en) 2001-04-19
EP0892758A1 (en) 1999-01-27
WO1997038934A1 (en) 1997-10-23
US6129502A (en) 2000-10-10

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