EP0063792B1 - Driving device to obtain a progressive bilateral movement for an object guided on rectilinear rails - Google Patents

Driving device to obtain a progressive bilateral movement for an object guided on rectilinear rails Download PDF

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Publication number
EP0063792B1
EP0063792B1 EP82103400A EP82103400A EP0063792B1 EP 0063792 B1 EP0063792 B1 EP 0063792B1 EP 82103400 A EP82103400 A EP 82103400A EP 82103400 A EP82103400 A EP 82103400A EP 0063792 B1 EP0063792 B1 EP 0063792B1
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EP
European Patent Office
Prior art keywords
slot
support
crankpins
crankpin
toothed wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82103400A
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German (de)
French (fr)
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EP0063792A1 (en
Inventor
René Londos
Jean-Luc Barbereau
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Generale De Manutention Et De Stockage Cgms Cie SA
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Generale De Manutention Et De Stockage Cgms Cie SA
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Publication of EP0063792A1 publication Critical patent/EP0063792A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
    • B66F9/141—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements with shuttle-type movement
    • 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
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18248—Crank and slide
    • Y10T74/18256—Slidable connections [e.g., scotch yoke]

Definitions

  • the present invention relates to a device for driving in a bilateral progressive movement of a load support guided on rectilinear rails between two end positions, comprising a rectilinear light integral with the support to be driven, said light being elongated, perpendicular to the direction of movement. and open at its two ends, a first pinion and a second pinion each carrying an eccentric pin, reversible means for driving the pinions in rotation driving them simultaneously but in opposite directions from one another, by a half maximum turn and thus making the corresponding crankpin travel a semi-circular trajectory.
  • Document FR-A-2322088 has already proposed a device as above in which the two pinions are linked to a sub-assembly of drive plate which is driven in translation at constant speed by means of a drive pinion acting on a rack linked to the drive plate, the translation of the drive plate causes the simultaneous rotation and in opposite direction of the two pinions which, on the one hand mesh with each other and on the other hand mesh each with a rack linked to the base plate.
  • the rotation of the pinions by 360 ° causes, by means of their crank pin each placed in a light secured to an intermediate element, said intermediate element in translation relative to the drive plate according to a law of sinusoidal movement as a function of the angle of rotation of the pinions.
  • the translational movement at constant speed of the drive plate is thus transformed into a sinusoidal movement which achieves the desired progressive movement.
  • such a device is complicated and comprises at least three sub-assemblies: the base plate sub-assembly, the drive plate sub-assembly and the intermediate element sub-assembly.
  • Document DE-A-2 545 010 furthermore describes a device making it possible to drive a handling member which comprises lugs cooperating with lights and both traveling the same trajectory, that is to say a trajectory comprising rectilinear parts between semicircular parts.
  • the organ which is moved successively carries out an accelerated movement, a movement at constant speed and a slowing movement.
  • the presence of the rectilinear part, causing a movement at constant speed, increases the cycle time.
  • the object of the present invention is to provide a simple progressive drive device which does not include a bearing at constant speed.
  • the stroke of the support along the straight rails is determined by the displacement of one of the two crankpins in the light. Furthermore, at start-up, the driving action of the crankpin in the light is gradually established, whatever the load placed on the support and independently of it. In the same way, at the end of the race the action of the crank pin on the edge of the light gradually decreases due to its circular trajectory which at the end of the race is tangential to the light, and whatever the load supported.
  • the device which is the subject of the invention is particularly suitable for driving the telescopic forks of a handling trolley, in a bilateral progressive movement, on either side of a circulation aisle.
  • the invention therefore also relates to a handling trolley comprising a telescopic fork with two teeth each constituted by superimposed rules movable with respect to each other, and a drive device as above, characterized in that '' it includes a retaining plate which is fixed transversely to the corresponding movable rules of the two teeth and includes a light perpendicular to these rules and open at these two ends, and, between two support bases for the teeth, two rotary pinions mounted on the chassis, driven in opposite directions and alternately engaging in the light two crank pins which each travel a circular trajectory around the axis of the pinion which carries it.
  • the device which is the subject of the invention is intended to ensure the rectilinear displacement of a support for load consisting of two teeth of a telescopic fork of a handling trolley.
  • the teeth are parallel and each preferably consists of three rules mounted telescopically.
  • a lower rule, or fixed rule 30, is supported at each of its ends by a support block 32 secured to the chassis of the carriage and forms two slides in which rollers roll 33 secured to an intermediate rule 34.
  • a third rule 36 slides , by means of rollers 35, on this intermediate rule 34, and the load to be supported, represented in the form of a pallet 38, rests on the two upper rules 36 of the fork.
  • the intermediate rules 34 of the two teeth of the telescopic fork carried by the carriage are joined together by a retaining plate 60 fixed transversely to the two intermediate rules.
  • the drive device of the invention has the function of acting on this plate 60 to drive it in a rectilinear manner by means of a motor 3 associated with a reduction gear 4 which drives in rotation at a constant speed a pinion toothed 6.
  • the pinion 6 is connected by a chain 44 to two pinions, respectively 42 and 43, which are mobile, in rotation only, and are driven by the chain 44 in opposite directions by means of a change of direction pinion 46 ( figure 2).
  • Each of the pinions 42 and 43 carries a radial arm, respectively 49 and 48, at the end of which is fixed a crank pin respectively 50 and 52, which thus travels a circular trajectory around the axis of the corresponding pinion 42 or 43 during the rotation of the latter.
  • the retaining plate 60 to be driven has a narrow and elongated lumen 54 which is open at its two ends.
  • This lumen 54 is delimited by two profiled and offset bars 62 and 63, fixed under the retaining plate 60 and comprises two parallel rectilinear edges, of the same length 55 and 56 which are each extended at one end by a curved ramp, respectively 57 and 58, these two ramps being directed in opposite directions.
  • This drive device comprises a central neutral position, which is shown in solid lines in FIG. 2 and in which the two crankpins 50 and 52 are engaged in the lumen 54, each close to one of the ends thereof. .
  • the driving pinion 6 is driven in a clockwise direction, for example, the pinion 42 rotating in the same direction moves the crank pin 50 towards the inside of the lumen 54, while the pinion 43 rotating in the opposite direction brings out the crank pin 52 from the light 54.
  • the crank pin 50 therefore acts alone on the light 54 and forces it to move progressively along the slides on which the retaining plate 60 is mounted.
  • the displacement of the light 54 corresponds to a half-turn of rotation of the pinion 42, that is to say to a semi-circular trajectory of the crank pin 50.
  • crankpin 52 has made a half-turn under no load, outside the light.
  • the return of the plate 60 or of the light 54 in the neutral position is carried out in the opposite direction, simply by changing the direction of rotation of the motor pinion 6, which also causes the crankpin 52 to go back until it enters the lumen 54. If at this moment the pinion 6 continues to rotate anticlockwise, it is the crankpin 52 which drives the support 60 as well as the lumen 54 and causes its displacement a stroke equivalent to the first but in the opposite direction, while the crankpin 50 makes an empty half-turn.
  • the dimensions of the lumen 54 and the shape of the ramps 57, 58, as well as the relative positions of the circular trajectories of the crankpins 50 and 52, are such that there is always at least one crankpin engaged with the lumen 54, the crankpin 50 being practically locked in the slot 54 as long as the crankpin 52 is not fully engaged there, and vice versa.
  • the set of pinions 42, 43 and arms 48, 49 are mounted under the telescopic fork, between the bases 32 which support the two teeth.
  • the trolley thus produced makes it possible to deposit or pick up loads stored in shelves located on each side of an aisle in which the trolley is placed.
  • the displacement of the fork is precise and is carried out without risk of instability whatever the load, thanks to the cooperation of the crankpin and the light, and in particular to the fact that the acceleration and the deceleration are obtained without requiring adjustment especially the engine speed.
  • This simplicity of control and above all the safety of the slowing down and its progression possibly makes it possible to accelerate the movement by increasing the speed of the motor when it is desired to obtain a shorter cycle time, for example for a movement without load.

Description

La présente invention concerne un dispositif d'entraînement en un mouvement progressif bilatéral d'un support de charge guidé sur des rails rectilignes entre deux positions terminales, comportant une lumière rectiligne solidaire du support à entraîner, ladite lumière étant allongée, perpendiculaire au sens de déplacement et ouverte à ses deux extrémités, un premier pignon et un second pignon portant chacun un maneton excentré, des moyens réversibles d'entraînement en rotation des pignons les entraînant simultanément mais en sens inverse l'un de l'autre, d'un demi-tour au maximum et faisant ainsi parcourir au maneton correspondant une trajectoire semi-circulaire.The present invention relates to a device for driving in a bilateral progressive movement of a load support guided on rectilinear rails between two end positions, comprising a rectilinear light integral with the support to be driven, said light being elongated, perpendicular to the direction of movement. and open at its two ends, a first pinion and a second pinion each carrying an eccentric pin, reversible means for driving the pinions in rotation driving them simultaneously but in opposite directions from one another, by a half maximum turn and thus making the corresponding crankpin travel a semi-circular trajectory.

Il existe de nombreux dispositifs qui permettent d'entraîner le long de rails rectilignes un organe déterminé, entre deux positions terminales. Par contre l'entraînement entre ces deux positions d'un support de charge pose des problèmes importants, tels que celui de la stabilité de la charge supportée, car l'accélération de même que la décélération du mouvement dépendent de la masse à déplacer et cette masse est fréquem- ment variable. Ce problème se rencontre notamment dans le cas des chariots de manutention dont les fourches télescopiques doivent se déplacer d'un côté et de l'autre d'une allée de circulation afin de déposer et/ou de reprendre des charges diverses, stockées dans des rayonnages, car ces fourches doivent atteindre un point précis des rayonnages, qu'elles portent une charge ou n'en portent pas, et quel que soit le poids de cette charge.There are numerous devices which make it possible to drive a determined member along rectilinear rails, between two terminal positions. On the other hand, driving between these two positions of a load support poses significant problems, such as that of the stability of the load supported, since the acceleration as well as the deceleration of the movement depend on the mass to be moved and this mass is frequently variable. This problem is encountered in particular in the case of handling carts whose telescopic forks must move on one side and the other of a circulation aisle in order to deposit and / or pick up various loads, stored in shelving , because these forks must reach a specific point on the shelves, whether they carry a load or not, and regardless of the weight of this load.

On a déjà proposé dans le document FR-A-2322088 un dispositif tel que ci-dessus dans lequel les deux pignons sont liés à un sous-ensemble de plaque d'entraînement qui est entraîné en translation à vitesse constante par le moyen d'un pignon d'entraînement agissant sur une crémaillère liée à la plaque d'entraînement, la translation de la plaque d'entraînement provoque la rotation simultanée et en sens inverse des deux pignons qui, d'une part engrènent entre eux et d'autre part engrènent chacun avec une crémaillère liée à la plaque de base.Document FR-A-2322088 has already proposed a device as above in which the two pinions are linked to a sub-assembly of drive plate which is driven in translation at constant speed by means of a drive pinion acting on a rack linked to the drive plate, the translation of the drive plate causes the simultaneous rotation and in opposite direction of the two pinions which, on the one hand mesh with each other and on the other hand mesh each with a rack linked to the base plate.

La rotation des pignons de 360° entraîne, par l'intermédiaire de leur maneton placé chacun dans une lumière solidaire d'un élément intermédiaire, ledit élément intermédiaire en translation par rapport à la plaque d'entraînement selon une loi du mouvement sinusoïdal en fonction de l'angle de rotation des pignons. Le mouvement de translation à vitesse constante de la plaque d'entraînement est ainsi transformé en un mouvement sinusoïdal qui réalise le mouvement progressif recherché.The rotation of the pinions by 360 ° causes, by means of their crank pin each placed in a light secured to an intermediate element, said intermediate element in translation relative to the drive plate according to a law of sinusoidal movement as a function of the angle of rotation of the pinions. The translational movement at constant speed of the drive plate is thus transformed into a sinusoidal movement which achieves the desired progressive movement.

Cependant, un tel dispositif est compliqué et comporte au moins trois sous-ensembles : le sous-ensemble plaque de base, le sous-ensemble plaque d'entraînement et le sous-ensemble d'élément intermédiaire.However, such a device is complicated and comprises at least three sub-assemblies: the base plate sub-assembly, the drive plate sub-assembly and the intermediate element sub-assembly.

Le document DE-A-2 545 010 décrit par ailleurs un dispositif permettant d'entraîner un organe de manutention qui comporte des ergots coopérant avec des lumières et parcourant tous les deux la même trajectoire, c'est-à-dire une trajectoire comportant des parties rectilignes entre des parties semi-circulaires.Document DE-A-2 545 010 furthermore describes a device making it possible to drive a handling member which comprises lugs cooperating with lights and both traveling the same trajectory, that is to say a trajectory comprising rectilinear parts between semicircular parts.

En conséquence, l'organe qui est déplacé effectue successivement un mouvement accéléré, un mouvement à vitesse constante et un mouvement de ralentissement. La présence de la partie rectiligne, provoquant un mouvement à vitesse constante, augmente le temps du cycle.Consequently, the organ which is moved successively carries out an accelerated movement, a movement at constant speed and a slowing movement. The presence of the rectilinear part, causing a movement at constant speed, increases the cycle time.

La présente invention a pour but de réaliser un dispositif d'entraînement progressif simple et ne comportant pas de palier à vitesse constante.The object of the present invention is to provide a simple progressive drive device which does not include a bearing at constant speed.

Ce but est atteint par le dispositif tel qu'il est caractérisé dans la revendication 1.This object is achieved by the device as characterized in claim 1.

Dans un tel dispositif, la course du support le long des rails rectilignes est déterminée par le déplacement de l'un des deux manetons dans la lumière. Par ailleurs, au démarrage, l'action d'entraînement du maneton dans la lumière s'établit progressivement, quelle que soit la charge placée sur le support et indépendamment de celle-ci. De la même manière, en fin de course l'action du maneton sur le bord de la lumière se réduit progressivement en raison de sa trajectoire circulaire qui en fin de course est tangentielle à la lumière, et quelle que soit la charge supportée.In such a device, the stroke of the support along the straight rails is determined by the displacement of one of the two crankpins in the light. Furthermore, at start-up, the driving action of the crankpin in the light is gradually established, whatever the load placed on the support and independently of it. In the same way, at the end of the race the action of the crank pin on the edge of the light gradually decreases due to its circular trajectory which at the end of the race is tangential to the light, and whatever the load supported.

Le dispositif objet de l'invention est tout particulièrement adapté à l'entraînement des fourches télescopiques d'un chariot de manutention, en un mouvement progressif bilatéral, de part et d'autre d'une allée de circulation.The device which is the subject of the invention is particularly suitable for driving the telescopic forks of a handling trolley, in a bilateral progressive movement, on either side of a circulation aisle.

L'invention a donc aussi pour objet un chariot de manutention comportant une fourche télescopique à deux dents constituées chacune par des règles superposées et mobiles les unes par rapport aux autres, et un dispositif d'entraînement tel que ci-dessus, caractérisé en ce qu'il comporte une plaque de maintien qui est fixée transversalement sur les règles mobiles correspondantes des deux dents et comporte une lumière perpendiculaire à ces règles et ouvertes à ces deux extrémités, et, entre deux socles de support des dents, deux pignons rotatifs montés sur le châssis, entraînés en sens inverse et engageant alternativement dans la lumière deux manetons qui parcourent chacun une trajectoire circulaire autour de l'axe du pignon qui le porte.The invention therefore also relates to a handling trolley comprising a telescopic fork with two teeth each constituted by superimposed rules movable with respect to each other, and a drive device as above, characterized in that '' it includes a retaining plate which is fixed transversely to the corresponding movable rules of the two teeth and includes a light perpendicular to these rules and open at these two ends, and, between two support bases for the teeth, two rotary pinions mounted on the chassis, driven in opposite directions and alternately engaging in the light two crank pins which each travel a circular trajectory around the axis of the pinion which carries it.

L'invention sera bien comprise à la lumière de la description d'un exemple de réalisation de l'invention faite ci-après en regard du dessin annexé dans lequel :

  • La figure 1 représente schématiquement en élévation une fourche de manutention à laquelle est appliquée l'invention.
  • La figure 2 est une vue schématique montrant le dispositif d'entraînement.
The invention will be clearly understood in the light of the description of an embodiment of the invention given below with reference to the appended drawing in which:
  • Figure 1 shows schematically in elevation a handling fork to which the invention is applied.
  • Figure 2 is a schematic view showing the drive device.

Le dispositif objet de l'invention est destiné à assurer le déplacement rectiligne d'un support de charge constitué par deux dents d'une fourche télescopique d'un chariot de manutention. Les dents sont parallèles et constituées chacune, de préférence, par trois règles montées de manière télescopique. Une règle inférieure, ou règle fixe 30, est supportée à chacune de ses extrémités par un bloc de support 32 solidaire du châssis du chariot et forme deux glissières dans lesquelles roulent des galets 33 solidaires d'une règle intermédiaire 34. Une troisième règle 36 coulisse, par l'intermédiaire de galets 35, sur cette règle intermédiaire 34, et la charge à supporter, représentée sous la forme d'une palette 38, repose sur les deux règles supérieures 36 de la fourche. Les règles intermédiaires 34 des deux dents de la fourche télescopique portée par le chariot sont réunies entre elles par une plaque de maintien 60 fixée transversalement aux deux règles intermédiaires.The device which is the subject of the invention is intended to ensure the rectilinear displacement of a support for load consisting of two teeth of a telescopic fork of a handling trolley. The teeth are parallel and each preferably consists of three rules mounted telescopically. A lower rule, or fixed rule 30, is supported at each of its ends by a support block 32 secured to the chassis of the carriage and forms two slides in which rollers roll 33 secured to an intermediate rule 34. A third rule 36 slides , by means of rollers 35, on this intermediate rule 34, and the load to be supported, represented in the form of a pallet 38, rests on the two upper rules 36 of the fork. The intermediate rules 34 of the two teeth of the telescopic fork carried by the carriage are joined together by a retaining plate 60 fixed transversely to the two intermediate rules.

Le dispositif d'entraînement de l'invention a pour fonction d'agir sur cette plaque 60 pour l'entraîner d'une manière rectiligne au moyen d'un moteur 3 associé à un réducteur 4 qui entraîne en rotation à une vitesse constante un pignon denté 6.The drive device of the invention has the function of acting on this plate 60 to drive it in a rectilinear manner by means of a motor 3 associated with a reduction gear 4 which drives in rotation at a constant speed a pinion toothed 6.

Le pignon 6 est relié par une chaîne 44 à deux pignons, respectivement 42 et 43, qui sont mobiles, en rotation seulement, et sont entraînés par la chaîne 44 en sens inverse par l'intermédiaire d'un pignon de changement de direction 46 (figure 2). Chacun des pignons 42 et 43 porte un bras radial, respectivement 49 et 48, à l'extrémité duquel est fixé un maneton respectivement 50 et 52, qui parcourt ainsi une trajectoire circulaire autour de l'axe du pignon correspondant 42 ou 43 lors de la rotation de ce dernier.The pinion 6 is connected by a chain 44 to two pinions, respectively 42 and 43, which are mobile, in rotation only, and are driven by the chain 44 in opposite directions by means of a change of direction pinion 46 ( figure 2). Each of the pinions 42 and 43 carries a radial arm, respectively 49 and 48, at the end of which is fixed a crank pin respectively 50 and 52, which thus travels a circular trajectory around the axis of the corresponding pinion 42 or 43 during the rotation of the latter.

Par ailleurs, la plaque de maintien 60 à entraîner, comporte une lumière étroite et allongée 54 qui est ouverte à ses deux extrémités. Cette lumière 54 est délimitée par deux barres 62 et 63 profilées et décalées, fixées sous la plaque de maintien 60 et comprend deux bords rectilignes parallèles, de même longueur 55 et 56 qui sont prolongés chacun à une extrémité par une rampe incurvée, respectivement 57 et 58, ces deux rampes étant dirigées en sens inverse.Furthermore, the retaining plate 60 to be driven has a narrow and elongated lumen 54 which is open at its two ends. This lumen 54 is delimited by two profiled and offset bars 62 and 63, fixed under the retaining plate 60 and comprises two parallel rectilinear edges, of the same length 55 and 56 which are each extended at one end by a curved ramp, respectively 57 and 58, these two ramps being directed in opposite directions.

Ce dispositif d'entraînement comporte une position neutre centrale, qui est représentée en trait plein sur la figure 2 et dans laquelle les deux manetons 50 et 52 sont engagés dans la lumière 54, chacun à proximité de l'une des extrémités de celle-ci. Si le pignon moteur 6 est entraîné dans le sens des aiguilles d'une montre, par exemple, le pignon 42 tournant dans le même sens déplace le maneton 50 vers l'intérieur de la lumière 54, tandis que le pignon 43 tournant en sens inverse fait sortir le maneton 52 de la lumière 54. Le maneton 50 agit donc seul sur la lumière 54 et oblige celle-ci à se déplacer progressivement le long des glissières sur lesquelles est montée la plaque de maintien 60. Le déplacement de la lumière 54 correspond à un demi-tour de rotation du pignon 42, c'est-à-dire à une trajectoire en demi-cercle du maneton 50.This drive device comprises a central neutral position, which is shown in solid lines in FIG. 2 and in which the two crankpins 50 and 52 are engaged in the lumen 54, each close to one of the ends thereof. . If the driving pinion 6 is driven in a clockwise direction, for example, the pinion 42 rotating in the same direction moves the crank pin 50 towards the inside of the lumen 54, while the pinion 43 rotating in the opposite direction brings out the crank pin 52 from the light 54. The crank pin 50 therefore acts alone on the light 54 and forces it to move progressively along the slides on which the retaining plate 60 is mounted. The displacement of the light 54 corresponds to a half-turn of rotation of the pinion 42, that is to say to a semi-circular trajectory of the crank pin 50.

Pendant ce temps le maneton 52 a effectué un demi-tour à vide, à l'extérieur de la lumière. Le retour de la plaque 60 ou de la lumière 54 dans la position neutre s'effectue en sens inverse, simplement en changeant le sens de rotation du pignon moteur 6, ce qui fait également revenir le maneton 52 en arrière jusqu'à ce qu'il pénètre dans la lumière 54. Si à ce moment le pignon 6 continue à tourner dans le sens inverse des aiguilles d'une montre, c'est le maneton 52 qui entraîne le support 60 ainsi que la lumière 54 et provoque son déplacement d'une course équivalente à la première mais en direction opposée, tandis que le maneton 50 effectue un demi-tour à vide.During this time the crankpin 52 has made a half-turn under no load, outside the light. The return of the plate 60 or of the light 54 in the neutral position is carried out in the opposite direction, simply by changing the direction of rotation of the motor pinion 6, which also causes the crankpin 52 to go back until it enters the lumen 54. If at this moment the pinion 6 continues to rotate anticlockwise, it is the crankpin 52 which drives the support 60 as well as the lumen 54 and causes its displacement a stroke equivalent to the first but in the opposite direction, while the crankpin 50 makes an empty half-turn.

Les dimensions de la lumière 54 et la forme des rampes 57, 58, ainsi que les positions relatives des trajectoires circulaires des manetons 50 et 52, sont telles qu'il y a toujours au moins un maneton en prise avec la lumière 54, le maneton 50 étant pratiquement verrouillé dans la lumière 54 tant que le maneton 52 n'y est pas totalement engagé, et inversement.The dimensions of the lumen 54 and the shape of the ramps 57, 58, as well as the relative positions of the circular trajectories of the crankpins 50 and 52, are such that there is always at least one crankpin engaged with the lumen 54, the crankpin 50 being practically locked in the slot 54 as long as the crankpin 52 is not fully engaged there, and vice versa.

L'ensemble des pignons 42, 43 et des bras 48, 49 sont montés sous la fourche télescopique, entre les socles 32 qui supportent les deux dents.The set of pinions 42, 43 and arms 48, 49 are mounted under the telescopic fork, between the bases 32 which support the two teeth.

Le chariot ainsi réalisé permet de déposer ou de reprendre des charges stockées dans des rayonnages situés de chaque côté d'une allée dans laquelle est placé le chariot. Le déplacement de la fourche est précis et s'effectue sans risque d'instabilité quelle que soit la charge, grâce à la coopération du maneton et de la lumière, et notamment au fait que l'accélération et la décélération sont obtenues sans nécessiter de réglage particulier de la vitesse du moteur. Cette simplicité de commande et surtout la sûreté du ralentissement et sa progression permettent éventuellement d'accélérer le déplacement en augmentant la vitesse du moteur lorsque l'on désire obtenir un temps de cycle plus court, par exemple pour un mouvement sans charge.The trolley thus produced makes it possible to deposit or pick up loads stored in shelves located on each side of an aisle in which the trolley is placed. The displacement of the fork is precise and is carried out without risk of instability whatever the load, thanks to the cooperation of the crankpin and the light, and in particular to the fact that the acceleration and the deceleration are obtained without requiring adjustment especially the engine speed. This simplicity of control and above all the safety of the slowing down and its progression possibly makes it possible to accelerate the movement by increasing the speed of the motor when it is desired to obtain a shorter cycle time, for example for a movement without load.

Claims (6)

1. A device for driving a load support guided on rectilinear rails between two end positions with a progressive bilateral movement, comprising a rectilinear slot (54) integral with the support (60) to be driven, said slot being elongated, perpendicular to the direction of movement and open at its two ends, a first toothed wheel (42) and a second toothed wheel (43), each carrying an excentric crankpin (50, 52), reversible means (3, 4, 6, 44, 46) for rotatively driving the toothed wheels, driving them simultaneously but in mutually opposite directions along a half-circle at the most and thus making the corresponding crankpin run through a half-circular path, characterized in that the axis of each toothed wheel (42, 43) is fixed, said axes being mounted respectively on either side of said slot (54) in its central neutral position, so that when the support (60) is in its central neutral position, the two crankpins (50, 52) engage simultaneously in said slot (54), the axis of the slot constituting in this position a tangent to the paths of the two crankpins, whereas one of the crankpins (50, 52) disengages from the slot when the driving means drive said toothed wheel into rotation.
2. A device according to claim 1, characterized in that each crankpin (50, 52) is carried by a radial arm (48, 49) on the outside of the corresponding toothed wheel (42, 43) and follows the semicircular path during the rotation of the latter.
3. A device according to one of claims 1 and 2, characterized in that the open slot (54) is curved at each of its ends to form two guiding ramps (57, 58) for the crankpins (50, 52) pointing in opposite directions and permitting their locking.
4. A device according to one of claims 1 to 3, characterized in that the toothed wheels (42, 43) are driven via a transmission chain (44) or a unit of toothed by a drive gear (6) whose direction of rotation can be reversed.
5. A device according to one of the preceding claims, characterized in that it is part of a loading charriot comprising a telescopic fork, the two teeth of which are constituted by superposed sliders (30, 34) and mobile with respect to one another, the support (60) being constituted by a support plate which is fixed transversely on the corresponding mobile sliders of the two teeth.
6. A device according to claim 5, characterized in that, in the central neutral position of the slot (54), the mobile sliders (34) connected by the support plate are retracted.
EP82103400A 1981-04-27 1982-04-22 Driving device to obtain a progressive bilateral movement for an object guided on rectilinear rails Expired EP0063792B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8108304A FR2504507A1 (en) 1981-04-27 1981-04-27 DEVICE FOR DRIVING, IN A PROGRESSIVE MOTION, OF A GUIDED MEMBER ON STRAIGHT TRACKS, PARTICULARLY SUITABLE FOR DRIVING TELESCOPIC FORKS OF HANDLING TROLLEYS
FR8108304 1981-04-27

Publications (2)

Publication Number Publication Date
EP0063792A1 EP0063792A1 (en) 1982-11-03
EP0063792B1 true EP0063792B1 (en) 1986-01-02

Family

ID=9257793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103400A Expired EP0063792B1 (en) 1981-04-27 1982-04-22 Driving device to obtain a progressive bilateral movement for an object guided on rectilinear rails

Country Status (5)

Country Link
US (1) US4437808A (en)
EP (1) EP0063792B1 (en)
DE (1) DE3268235D1 (en)
FR (1) FR2504507A1 (en)
NO (1) NO160652C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574350A (en) * 1982-05-19 1986-03-04 At&T Bell Laboratories Shared resource locking apparatus
DE4341392C1 (en) * 1993-12-04 1994-12-22 Braun Ag Eccentric rocking-link drive
FR2823572B1 (en) 2001-04-12 2004-11-26 Cit Alcatel METHOD OF STRIPPING OPTICAL FIBER
US8070455B2 (en) * 2009-05-18 2011-12-06 Syngardia Systems, Inc,. Scotch-yoke mechanism for redundant actuation applications

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR602535A (en) * 1925-05-25 1926-03-20 United Cigarette Mach Co Inc Kinematic mechanisms
DE1076036B (en) * 1958-09-10 1960-02-18 Demag Zug Gmbh Stacker crane
FR2138491B1 (en) * 1971-05-27 1974-04-26 Silopark Brevetti Sa
US3765251A (en) * 1972-04-12 1973-10-16 Rohr Industries Inc Shuttle transfer with sine wave time/velocity acceleration
US4016984A (en) * 1975-08-28 1977-04-12 Eaton Corporation Shuttle assembly for a load handling apparatus
DE2545010C3 (en) * 1975-10-08 1983-11-03 Mannesmann AG, 4000 Düsseldorf Displacement drive for a carrier that can be retracted into the shelf on the lifting carriage of a storage and retrieval vehicle
DE2558231A1 (en) * 1975-12-23 1977-07-07 Schmidt Paul Freight container storage transporter - has crank arms for side loading and unloading on two radial arms and suspension beam
DE7718050U1 (en) * 1977-06-08 1979-01-04 Theobald, Adolf, 5758 Froendenberg DEVICE FOR STORAGE OF PALLETS FOR STORAGE

Also Published As

Publication number Publication date
NO160652B (en) 1989-02-06
NO160652C (en) 1989-05-16
US4437808A (en) 1984-03-20
FR2504507A1 (en) 1982-10-29
NO821352L (en) 1982-10-28
DE3268235D1 (en) 1986-02-13
FR2504507B1 (en) 1985-04-12
EP0063792A1 (en) 1982-11-03

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