EP1914193B1 - Scissor lift - Google Patents
Scissor lift Download PDFInfo
- Publication number
- EP1914193B1 EP1914193B1 EP20070360052 EP07360052A EP1914193B1 EP 1914193 B1 EP1914193 B1 EP 1914193B1 EP 20070360052 EP20070360052 EP 20070360052 EP 07360052 A EP07360052 A EP 07360052A EP 1914193 B1 EP1914193 B1 EP 1914193B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- lift table
- table according
- scissor element
- scissor
- 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 - Fee Related
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Classifications
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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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
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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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
Definitions
- the present invention relates to a scissor lift table comprising a load-bearing platform supported by at least one chisel formed of a pair of legs articulated at their point of intersection and provided with four movable support points respectively flowing in linked upper rails. to the load bearing tray and in lower rails connected to the ground or to a frame, and at least one first actuator coupled to said chisel for moving said load bearing tray vertically between at least one low position and a high position.
- This type of lifting table is commonly used in the field of handling and allows to lower and / or raise a load in a horizontal plane.
- the load bearing tray can be flat or vee in particular to move heavy coils (ferrous and non-ferrous metals, paper, plastic film, etc.) intended for loading and / or unloading reels.
- the lifting table can be equipped with a single chisel or several superimposed scissors as in the example of the publication GB 927,600 . This chisel can be asymmetrical or symmetrical.
- the chisel is asymmetrical, that is to say it has two fixed support points provided with a hinge and two movable support points provided with a roller.
- the distribution of a centered load which is uniformly distributed over the four support points in the low position of the plate, varies during the lifting of the plate to focus on the two mobile support points in the high position. This phenomenon inevitably leads to premature wear of the rollers, especially in the case of heavy loads.
- This problem is solved by the use of a symmetrical chisel provided with four movable support points.
- links are mounted between the plate and the legs of the chisel to allow the lift table to move in its axis of symmetry.
- An example is illustrated in the publication GB 326,362 .
- the lift table can be fixed or mobile relative to the ground or to a frame.
- the lift table is in known manner carried by an additional carriage mounted rolling in open rails fixed to the ground and controlled by an actuator and a mechanical transmission chain and pinions for example.
- This solution is expensive, bulky in height and a source of accident for the operator with the risk of crushing his feet.
- the loading height being higher than for a fixed lifting table, it requires the manufacture of specific reels with high mandrel height where high machinery prices.
- Another solution is described in the publication US 5,339,749 wherein the lift table is mounted on sliders movable in horizontal translation by a screw system / nuts driven by a motor. This same motor allows depending on the direction of rotation of the worm to move the lift table vertically, which therefore has no own actuator, which is very restrictive.
- the vertical actuator used in this type of lifting table is generally constituted by a jack of any known type, single or double effect, mounted in an inclined position or between a lower frame and one of the chisel legs as in the publication GB 1 502 778 , or between the point of intersection of the chisel and the plate as in the publication GB 2,301,282 , to generate the vertical displacement of the plate.
- This provision necessarily generates variable lifting forces as a function of the level of elevation of the plate and limits the low position of the plate because of the size of the actuator.
- the present invention aims to solve the various problems mentioned above by providing a mobile scissor lift table and secure, simple and economical construction, ensuring a uniform distribution of a centered load and a constant lifting force whatever the elevation level, whose low and high positions are optimized, and compatible with the loading height of traditional reels.
- the invention relates to a lifting table of the type indicated in the preamble, characterized in that it comprises at least one second actuator coupled to said chisel for moving said lifting table horizontally in guide rails formed by said lower rails in which circulating the corresponding mobile support points of said chisel.
- the lift table is made mobile in horizontal translation very simply and safely, with no difference in level with respect to existing reels.
- the second actuator is fixed, placed at the end of the lower rails and coupled to the chisel by a first transmission.
- the second actuator is embedded on said chisel and coupled to the lower rails by a second transmission.
- the point of application of the traction force or thrust of said second actuator is advantageously located in the axis of symmetry of the lift table, this axis passing through the articulation of the chisel.
- the lift table according to the invention comprises at least a first centering rod mounted between one of the chisel legs and a fixed high point connected to the load-bearing platform, and at least one second centering rod mounted between the other leg chisel and a mobile low point flowing in the lower rails.
- the first and second centering rods have for example a length equal to one quarter of the length of the chisel legs and the high and low points are aligned and coincident with the axis of symmetry of the table passing through the joint of the chisel.
- the first actuator is preferably arranged in the axis of symmetry of the lifting table passing through the articulation of the chisel and extends from said articulation to said load bearing plate so that a predetermined stroke of this actuator generates a multiplied stroke of the load bearing plate. If the chisel joint is located substantially in the center of the legs; the predetermined stroke of the first actuator generates a doubled stroke of the load bearing plate.
- the first actuator is preferably separate from the axis of symmetry of the lifting table passing through the articulation of the chisel and extends between the two legs of the chisel. This first actuator may comprise a jack, the rod may be telescopic or not.
- the lifting table comprises two identical and parallel scissors, said first actuator being housed between the scissors carried for example by a stirrup fixed to the articulation of the scissors.
- each chisel is associated with a pair of centering rods and the low points of the second centering rods are mounted on the same axle shaft coupled to said second actuator.
- the scissor lift table 1, 1 ' is intended to raise and / or lower loads, especially in a horizontal plane, for example to load and / or unload a reel (not shown) .
- this lifting table 1, 1 ' has the advantage of being movable in translation in guide rails fixed to the ground to feed a reel or the like, which can be fixed or movable.
- the lifting table 1, 1 ' comprises a load-bearing platform 10 supported by two identical scissors 20, arranged parallel on either side of the plate 10.
- the load-carrying tray 10 may comprise a surface upper 11 plane, vee as in the examples illustrated, cylindrical, perforated or any other suitable form.
- Each chisel 20 consists of a pair of legs 21, 22 hinged at their intersection point called hinge 23.
- this hinge 23 coincides with the center of the legs 21, 22 so that the chisel 20 is perfectly symmetrical with respect to the two orthogonal axes passing through the articulation 23.
- this joint can also be distinct from the center of the legs of the chisel, the chisel then being symmetrical with respect to a single axis.
- each chisel 20 form four movable support points and are equipped with rollers 24 or the like, able to circulate respectively in upper rails 6 secured to the load bearing plate 10 and in the lower rails 5 fixed on the ground or on a frame or other.
- the lower rails 5 form guide rails in translation of the lifting table 1, 1 ', their length being determined according to the path to be traveled by said lifting table 1, 1'.
- the lifting table 1, 1 ' comprises at least a first actuator 30, 30' for moving the load bearing plate 10 vertically between a low position (cf. Fig. 3 , 6 ) and a high position (see other figures) and vice versa.
- the actuator 30 is arranged vertically in the axis of symmetry A of the lifting table 1, perpendicular to the load bearing plate 10, passing through the hinge 23 of the chisel 20. It extends between this hinge 23 and the door plate load 10 directly to the load, so that it has no direct effect on the lower rails 5 and the thrust force has only a vertical component.
- the lower rails 5 are not subjected to any bending stress that may create linearity defects and can thus serve as guide rails for moving in translation the mobile lifting table 1.
- the thrust force generated is always equal to that of the force developed by the actuator 30 divided by two, this ratio of 1 ⁇ 2 being fixed regardless of the level of elevation of the carrier plate load 10.
- this 1 ⁇ 2 ratio differs according to the position of the hinge 23 of the chisel 20.
- the stroke of the actuator 30 generates a reduced stroke of the load carrying tray 10.
- the coefficient of This actuator 30 is preferably constituted by a cylinder with single or double effect, hydraulic, pneumatic, electric, electromagnetic, but can be constituted by any other type of equivalent actuator. It may advantageously consist of a pneumo-hydraulic jack commonly used in garages, using compressed air present in all factories, of robust and reliable construction, and available as a standard piece in commerce, and therefore economically profitable.
- This jack may comprise a single rod or a telescopic rod 31 with two or more stages.
- a telescopic rod 31 significantly reduces the size of the cylinder to achieve a low dead point very low when the lift table 1 is in the low position.
- the body 32 of this jack is mounted on a yoke 33 disposed between the two scissors 20 and fixed to the hinge 23.
- the end of the telescopic rod 31 is fixed to the load plate 10 by any known means.
- the reverse configuration is possible, ie the cylinder body can be in direct support on the load bearing plate and the cylinder rod can be coupled to the chisel joint.
- the lifting table 1 comprises two first parallel actuators 30', distinct from the axis of symmetry A, arranged between the two scissors 20 and extending between the two legs 21, 22 of the chisel 20. They extend more precisely between the lower end of a first leg 22 and a fulcrum of the second leg 21 located above the hinge 23.
- the actuators 30 ' have no direct effect on the lower rails 5 and do not generate any bending stress likely to create linearity defects, so that these lower rails 5 may as for the previous example serve as guide rails for translational movement of the mobile lifting table 1 '.
- the lifting table 1, 1 ' is completed by at least one centering rod 40, 50 articulated between the chisel 20 and the load plate 10 so that the latter remains centered on the axis of symmetry A of the table during its vertical movements .
- the lifting table 1, 1 ' comprises a first centering rod 40 extending between a hinge point 41 connected to the leg 21 of the chisel 20 and a high point 42 connected to the load bearing plate 10 and a second centering rod 50 extending between a hinge point 51 connected to the other leg 22 of the chisel 20 and a low point 52 connected to the lower rails 5.
- the centering links 40, 50 have a length equal to one quarter of the length of the legs 21, 22 of the chisel 20, the hinge points 41, 51 are placed in the middle of the relevant section of each leg 21, 22 and the high points 42 and bottom 52 are aligned with the articulation 23 of the chisel 20 and coincides with the axis of symmetry A.
- the lifting table 1, 1 ' is movable in guide rails constituted by said lower rails 5 of the table and comprises for this purpose at least one second actuator 60, 60' couple with the chisel 20 to move said table horizontally from right to left and vice versa.
- the lower rails 5 preferably have a C shape to define a secure raceway, anti-crush for the feet of the operator, anti-derailment and anti-tilt.
- the low point 52 of the second links 50 comprises at least one rolling roller 54 or the like, flowing in the lower rails 5, these rollers 54 being mounted on the same axle shaft 55.
- the actuator 60 which may be an electric, pneumatic, hydraulic or similar motor, is attached to one end of the lower rails 5 and is arranged to pull and push the axle shaft 55 by via a first transmission 61 to chain, cable, belt, screw-nut or the like, and translate the load bearing plate 10 in both directions.
- a hydraulic cylinder, pneumatic or similar fixed to the ground and in direct engagement with the axle shaft 55, can provide this function.
- the first actuator 30 can be easily housed under the load-carrying tray 10, since the second actuator 60 is dissociated from the lifting table 1.
- the actuator 60 ' which can be an electric, pneumatic, hydraulic or similar motor, is embedded on the chisel 20, carried by a chair 56 connected to the axle 55 and provided with wheels 57 flowing in the lower rails 5.
- This actuator 60 ' is coupled to the lower rails 5 by a second transmission, such as a pinion (not visible) meshing with a rack 58 fixed to the ground between the lower rails 5, or by any equivalent means.
- a second transmission such as a pinion (not visible) meshing with a rack 58 fixed to the ground between the lower rails 5, or by any equivalent means.
- the stroke of the lifting table 1 ' can be increased without limit, unlike the first embodiment.
- the first actuators 30 ' must be offset with respect to the axis of symmetry A of the table 1 'as the second actuator 60' is housed between the scissors 20 under the load plate 10.
- the point of application of the traction or thrust force is always located in the axis of symmetry A of the table passing through the hinge 23 of the scissors 20, whatever the level of elevation. Therefore, the second actuator 60, 60 'has no effect on the vertical position of the chisel 20 and the axle shaft 55 and its rollers 54 are not carrying, the load being fully supported by the rollers rolling 24 scissors 20.
- the lifting table 1, 1 ' according to the invention can be made cheaply due to the small amount of components, some of which are very simple to achieve in particular by oxycutting, low assembly time and some standard parts of the trade as per for example the actuators 30, 30 ', 60, 60'. It is of course possible to achieve a lifting table with two or more superimposed scissors, depending on the loading height, using the same technology.
- This lifting table is made mobile in horizontal translation very simply and safely, with no difference in level with existing reels and other machines arranged upstream and downstream.
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Description
La présente invention concerne une table élévatrice à ciseau comportant un plateau porte charge supporté par au moins un ciseau formé d'une paire de jambes articulées en leur point d'intersection et pourvues de quatre points d'appui mobiles circulant respectivement dans des rails supérieurs liés au plateau porte charge et dans des rails inférieurs liés au sol ou à un châssis, et au moins un premier actionneur couplé audit ciseau pour déplacer ledit plateau porte charge verticalement entre au moins une position basse et une position haute.The present invention relates to a scissor lift table comprising a load-bearing platform supported by at least one chisel formed of a pair of legs articulated at their point of intersection and provided with four movable support points respectively flowing in linked upper rails. to the load bearing tray and in lower rails connected to the ground or to a frame, and at least one first actuator coupled to said chisel for moving said load bearing tray vertically between at least one low position and a high position.
Ce type de table élévatrice est couramment utilisé dans le domaine de la manutention et permet d'abaisser et/ou d'élever une charge dans un plan horizontal. Selon le domaine d'utilisation et la forme de la charge à déplacer, le plateau porte charge peut être plan ou en vé notamment pour déplacer des bobines lourdes (métaux ferreux et non ferreux, papier, film plastique, etc.) destinées au chargement et/ou au déchargement de dévidoirs. Selon la course du plateau, la table élévatrice peut être équipée d'un seul ciseau ou de plusieurs ciseaux superposés comme dans l'exemple de la publication
Selon le domaine d'utilisation, la table élévatrice peut être fixe ou mobile par rapport au sol ou à un bâti. Pour la rendre mobile, -la table élévatrice est de manière connue portée par un chariot supplémentaire monté roulant dans des rails ouverts fixés au sol et commandé par un actionneur et une transmission mécanique à chaîne et pignons par exemple. Cette solution est onéreuse, encombrante en hauteur et source d'accident pour l'opérateur avec des risques d'écrasement de ses pieds. La hauteur de chargement étant plus élevée que pour une table élévatrice fixe, cela nécessite la fabrication de dévidoirs spécifiques à hauteur de mandrin importante d'où des prix de machines élevés. Une autre solution est décrite dans la
Par ailleurs, l'actionneur vertical utilisé dans ce type de table élévatrice est généralement constitué d'un vérin de tout type connu, à simple ou à double effet, monté en position inclinée soit entre un cadre inférieur et une des jambes du ciseau comme dans la
La présente invention vise à résoudre les différents problèmes évoqués ci-dessus en proposant une table élévatrice à ciseau mobile et sécurisée, de construction simple et économique, garantissant une répartition uniforme d'une charge centrée et une force d'élévation constante quel que soit le niveau d'élévation, dont les positions basse et haute sont optimisées, et compatibles avec la hauteur de chargement des dévidoirs traditionnels.The present invention aims to solve the various problems mentioned above by providing a mobile scissor lift table and secure, simple and economical construction, ensuring a uniform distribution of a centered load and a constant lifting force whatever the elevation level, whose low and high positions are optimized, and compatible with the loading height of traditional reels.
Dans ce but, l'invention concerne une table élévatrice du genre indiqué en préambule, caractérisée en ce qu'elle comporte au moins un second actionneur couplé audit ciseau pour déplacer ladite table élévatrice horizontalement dans des rails de guidage formés par lesdits rails inférieurs dans lesquels circulent les points d'appui mobiles correspondants dudit ciseau.For this purpose, the invention relates to a lifting table of the type indicated in the preamble, characterized in that it comprises at least one second actuator coupled to said chisel for moving said lifting table horizontally in guide rails formed by said lower rails in which circulating the corresponding mobile support points of said chisel.
Grâce à cette construction, la table élévatrice est rendue mobile en translation horizontale très simplement et en toute sécurité, sans différence de niveau par rapport aux dévidoirs existants.Thanks to this construction, the lift table is made mobile in horizontal translation very simply and safely, with no difference in level with respect to existing reels.
Dans une première forme de réalisation, le second actionneur est fixe, placé en bout des rails inférieurs et couplé au ciseau par une première transmission. Dans une seconde forme de réalisation, le second actionneur est embarqué sur ledit ciseau et couplé aux rails inférieurs par une seconde transmission. Dans tous les cas, le point d'application de la force de traction ou de poussée dudit second actionneur est avantageusement situé dans l'axe de symétrie de la table élévatrice, cet axe passant par l'articulation du ciseau.In a first embodiment, the second actuator is fixed, placed at the end of the lower rails and coupled to the chisel by a first transmission. In a second embodiment, the second actuator is embedded on said chisel and coupled to the lower rails by a second transmission. In all cases, the point of application of the traction force or thrust of said second actuator is advantageously located in the axis of symmetry of the lift table, this axis passing through the articulation of the chisel.
De préférence, la table élévatrice selon l'invention comporte au moins une première biellette de centrage montée entre une des jambes du ciseau et un point haut fixe lié au plateau porte charge, et au moins une seconde biellette de centrage montée entre l'autre jambe du ciseau et un point bas mobile circulant dans les rails inférieurs.Preferably, the lift table according to the invention comprises at least a first centering rod mounted between one of the chisel legs and a fixed high point connected to the load-bearing platform, and at least one second centering rod mounted between the other leg chisel and a mobile low point flowing in the lower rails.
Les première et seconde biellettes de centrage ont par exemple une longueur égale au quart de la longueur des jambes du ciseau et les points haut et bas sont alignés et confondus avec l'axe de symétrie de la table passant par l'articulation du ciseau.The first and second centering rods have for example a length equal to one quarter of the length of the chisel legs and the high and low points are aligned and coincident with the axis of symmetry of the table passing through the joint of the chisel.
Dans la première variante de réalisation, le premier actionneur est de préférence disposé dans l'axe de symétrie de la table élévatrice passant par l'articulation du ciseau et s'étend de ladite articulation audit plateau porte charge de sorte qu'une course prédéterminée de cet actionneur génère une course multipliée du plateau porte charge. Si l'articulation du ciseau est située sensiblement au centre des jambes; la course prédéterminée du premier actionneur génère une course multipliée par deux du plateau porte charge. Dans la seconde variante de réalisation, le premier actionneur est de préférence distinct de l'axe de symétrie de la table élévatrice passant par l'articulation du ciseau et s'étend entre les deux jambes du ciseau. Ce premier actionneur peut comporter un vérin, dont la tige peut être télescopique ou non.In the first embodiment, the first actuator is preferably arranged in the axis of symmetry of the lifting table passing through the articulation of the chisel and extends from said articulation to said load bearing plate so that a predetermined stroke of this actuator generates a multiplied stroke of the load bearing plate. If the chisel joint is located substantially in the center of the legs; the predetermined stroke of the first actuator generates a doubled stroke of the load bearing plate. In the second embodiment, the first actuator is preferably separate from the axis of symmetry of the lifting table passing through the articulation of the chisel and extends between the two legs of the chisel. This first actuator may comprise a jack, the rod may be telescopic or not.
De manière avantageuse, la table élévatrice comporte deux ciseaux identiques et parallèles, ledit premier actionneur étant logé entre les ciseaux porté par exemple par un étrier fixé à l'articulation des ciseaux. Dans ce cas, chaque ciseau est associé à une paire de biellettes de centrage et les points bas des secondes biellettes de centrage sont montés sur un même arbre d'essieu couplé audit second actionneur.Advantageously, the lifting table comprises two identical and parallel scissors, said first actuator being housed between the scissors carried for example by a stirrup fixed to the articulation of the scissors. In this case, each chisel is associated with a pair of centering rods and the low points of the second centering rods are mounted on the same axle shaft coupled to said second actuator.
La présente invention et ses avantages apparaîtront mieux dans la description suivante de deux modes de réalisation donnés à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels :
- la
figure 1 est une vue en perspective d'une table élévatrice mobile selon l'invention, - les
figures 2 et 3 sont des vues en coupe longitudinale de la table élévatrice de lafigure 1 respectivement en position haute et en position basse, - la
figure 4 est une vue de côté de la table de lafigure 1 , - la
figure 5 est une vue en coupe transversale de la table selon la ligne de coupe V-V de lafigure 4 , - les
figures 6 et 7 sont des vues en coupe longitudinale d'un autre mode de réalisation d'une table élévatrice mobile selon l'invention respectivement en position basse et en position haute, et - les
figures 8 et 9 sont des vues respectivement de coté et de dessus de la table desfigures 6 et 7 .
- the
figure 1 is a perspective view of a mobile lifting table according to the invention, - the
Figures 2 and 3 are views in longitudinal section of the lifting table of thefigure 1 respectively in the up position and in the down position, - the
figure 4 is a side view of the table from thefigure 1 , - the
figure 5 is a cross-sectional view of the table along the section line VV of thefigure 4 , - the
Figures 6 and 7 are views in longitudinal section of another embodiment of a mobile lifting table according to the invention respectively in the low position and in the high position, and - the
Figures 8 and 9 are respectively side and top views of the table ofFigures 6 and 7 .
En référence aux figures, la table élévatrice à ciseau 1, 1' selon l'invention est destinée à élever et/ou à abaisser des charges, notamment dans un plan horizontal, par exemple pour charger et/ou décharger un dévidoir (non représenté). De plus, cette table élévatrice 1, 1' a l'avantage d'être mobile en translation dans des rails de guidage fixés au sol pour alimenter un dévidoir ou similaire, qui peut être fixe ou mobile. La table élévatrice 1, 1' comporte un plateau porte charge 10 supporté par deux ciseaux 20 identiques, disposés parallèlement de part et d'autre du plateau 10. Selon la géométrie de la charge à manutentionner, le plateau porte charge 10 peut comporter une surface supérieure 11 plane, en vé comme dans les exemples illustrés, cylindrique, ajourée ou de toute autre forme adaptée.With reference to the figures, the scissor lift table 1, 1 'according to the invention is intended to raise and / or lower loads, especially in a horizontal plane, for example to load and / or unload a reel (not shown) . In addition, this lifting table 1, 1 'has the advantage of being movable in translation in guide rails fixed to the ground to feed a reel or the like, which can be fixed or movable. The lifting table 1, 1 'comprises a load-bearing
Chaque ciseau 20 est constitué d'une paire de jambes 21, 22 articulées en leur point d'intersection appelé articulation 23. Dans les exemples illustrés, cette articulation 23 est confondue avec le centre des jambes 21, 22 de sorte que le ciseau 20 est parfaitement symétrique par rapport aux deux axes orthogonaux passant par l'articulation 23. Dans d'autres variantes non représentées, cette articulation peut aussi être distincte du centre des jambes du ciseau, le ciseau étant alors symétrique par rapport à un seul axe. Les extrémités des jambes 21, 22 de chaque ciseau 20 forment quatre points d'appui mobiles et sont équipées de galets roulants 24 ou similaires, aptes à circuler respectivement dans des rails supérieurs 6 solidaires du plateau porte charge 10 et dans les rails inférieurs 5 fixés au sol ou sur un bâti ou autre.Each
Les rails inférieurs 5 forment des rails de guidage en translation de la table élévatrice 1, 1', leur longueur étant déterminée en fonction du trajet à parcourir par ladite table élévatrice 1, 1'.The
La table élévatrice 1, 1' comporte au moins un premier actionneur 30, 30' pour déplacer le plateau porte charge 10 verticalement entre une position basse (cf.
Dans le premier mode de réalisation illustré par les
Dans le second mode de réalisation illustré par les
La table élévatrice 1, 1' est complétée par au moins une biellette de centrage 40, 50 articulée entre le ciseau 20 et le plateau porte charge 10 pour que ce dernier reste centré sur l'axe de symétrie A de la table pendant ses déplacements verticaux. Dans les exemples représentés, la table élévatrice 1, 1' comporte une première biellette de centrage 40 s'étendant entre un point d'articulation 41 lié à la jambe 21 du ciseau 20 et un point haut 42 lié au plateau porte charge 10 et une seconde biellette de centrage 50 s'étendant entre un point d'articulation 51 lié à l'autre jambe 22 du ciseau 20 et un point bas 52 lié aux rails inférieurs 5. Dans les exemples représentés, les biellettes de centrage 40, 50 ont une longueur égale au quart de la longueur des jambes 21, 22 du ciseau 20, les points d'articulation 41, 51 sont placés au milieu du tronçon concerné de chaque jambe 21, 22 et les points haut 42 et bas 52 sont alignés avec l'articulation 23 du ciseau 20 et confondus avec l'axe de symétrie A.The lifting table 1, 1 'is completed by at least one centering
La table élévatrice 1, 1' selon l'invention est mobile dans des rails de guidage constitués par lesdits rails inférieurs 5 de la table et comporte à cet effet au moins un second actionneur 60, 60' coupler au ciseau 20 pour déplacer ladite table horizontalement de droite à gauche et inversement. Dans ce cas, les rails inférieurs 5 ont de préférence une forme en C pour définir un chemin de roulement sécurisé, anti-écrasement pour les pieds de l'opérateur, anti-déraillement et anti-basculement. Le point bas 52 des secondes biellettes 50 comporte au moins un galet roulant 54 ou similaire, circulant dans les rails inférieurs 5, ces galets roulants 54 étant montés sur un même arbre d'essieu 55.The lifting table 1, 1 'according to the invention is movable in guide rails constituted by said
Dans le premier mode de réalisation en référence aux
Dans le second mode de réalisation en référence aux
Dans les deux modes de réalisation, le point d'application de la force de traction ou de poussée est toujours situé dans l'axe de symétrie A de la table passant par l'articulation 23 des ciseaux 20, quel que soit le niveau d'élévation. De ce fait, le second actionneur 60, 60' n'a aucun effet sur la position verticale du ciseau 20 et l'arbre d'essieu 55 ainsi que ses galets roulants 54 ne sont pas porteurs, la charge étant entièrement supportée par les galets roulants 24 des ciseaux 20.In both embodiments, the point of application of the traction or thrust force is always located in the axis of symmetry A of the table passing through the
La table élévatrice 1, 1' selon l'invention peut être réalisée à moindre coût dû à la faible quantité de composants, dont certains sont très simples à réaliser notamment par oxycoupage, au faible temps de montage et à certaines pièces standard du commerce comme par exemple les actionneurs 30, 30', 60, 60'. Il est bien entendu possible de réaliser une table élévatrice pourvue de deux ciseaux superposés ou plus, en fonction de la hauteur de chargement, en utilisation la même technologie.The lifting table 1, 1 'according to the invention can be made cheaply due to the small amount of components, some of which are very simple to achieve in particular by oxycutting, low assembly time and some standard parts of the trade as per for example the
Il ressort clairement de cette description que l'invention permet d'atteindre les buts fixés, à savoir essentiellement une table élévatrice simple, robuste, très économique, dont la construction et la géométrie n'entraînent jamais de surcharge risquant de déformer voire de casser la machine comme dans l'art antérieur.It is clear from this description that the invention achieves the goals set, namely essentially a lift table simple, robust, very economical, whose construction and geometry never cause overload may deform or even break the machine as in the prior art.
Cette table élévatrice est rendue mobile en translation horizontale très simplement et en toute sécurité, sans différence de niveau par rapport aux dévidoirs existants et autres machines disposées en amont et en aval.This lifting table is made mobile in horizontal translation very simply and safely, with no difference in level with existing reels and other machines arranged upstream and downstream.
La présente invention n'est pas limitée aux exemples de réalisation décrits mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiments described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.
Claims (14)
- A scissor lift table (1, 1') comprising a load-carrying platform (10) borne by at least one scissor element (20) formed by a pair of arms (21, 22) articulated at their intersection point (23) and provided with four mobile support points (24) moving respectively in upper rails (6) connected to the said load-carrying platform (10) and in lower rails (5) connected to the ground or to a chassis, and at least a first actuator (30) coupled to the said scissor element (20) to displace the said load-carrying platform (10) vertically between a low position and a high position, characterised in that it comprises at least a second actuator (60, 60') coupled to the said scissor element (20) to displace the said lift table (1, 1') horizontally in guide rails formed by the said lower rails (5) in which there move the mobile support points corresponding to the said scissor element (20).
- A lift table according to Claim 1, characterised in that the said second actuator (60) is fixed, placed on the end of the said lower rails, and coupled to the scissor element (20) by a first transmission (61).
- A lift table according to Claim 1, characterised in that the said second actuator (60') is fitted on the said scissor element (20) and coupled to the said lower rails (5) by a second transmission (58).
- A lift table according to one of Claims 2 or 3, characterised in that the application point of the traction or thrust force of the said second actuator (60, 60') is situated in the axis of symmetry (A) of the said lift table (1, 1'), this axis passing through the articulation (23) of the said scissor element (20).
- A lift table according to Claim 1, characterised in that it comprises at least a first centring connecting rod (40) mounted between one of the arms (21) of the scissor element (20) and a high point (42) connected to the said load-carrying platform (10), and at least a second centring connecting rod (50) mounted between the other arm (22) of the scissor element (20) and a low point (52) travelling in the said lower rails (5).
- A lift table according to Claim 5, characterised in that the said first and second centring connecting rods (40, 50) have a length equal to one quarter of the length of the arms (21, 22) of the scissor element (20) and in that the said high point (42) and the said low point (52) are aligned and merged with the axis of symmetry (A) passing through the articulation (23) of the said scissor element (20).
- A lift table according to Claim 1, characterised in that the said first actuator (30) is disposed in the axis of symmetry (A) of the lift table (1) passing through the articulation (23) of the said scissor element (20) and extends from the said articulation (23) to the said load-carrying platform (10) so that a predetermined travel of the said actuator (30) generates a multiplied travel of the said load-carrying platform (10).
- A lift table according to Claim 7, characterised in that the said articulation (23) of the scissor element (20) is situated in the centre of the said arms (21, 22) so that the predetermined travel of the said actuator (30) generates a travel multiplied by two of the said load-carrying platform (10).
- A lift table according to Claim 1, characterised in that the said first actuator (30) is separate from the axis of symmetry (A) of the lift table (1) passing through the articulation (23) of the said scissor element (20) and extends between the two arms (21, 22) of the said scissor element (20).
- A lift table according to any one of Claims 7 to 9, characterised in that the said actuator (30) comprises a cylinder.
- A lift table according to Claim 10, characterised in that the said cylinder comprises a telescopic rod (31).
- A lift table according to any one of the preceding Claims, characterised in that it comprises two identical, parallel scissor elements (20), the said first actuator (30) being housed between the said scissor elements (20).
- A lift table according to Claim 12, characterised in that the said first actuator (30) is borne by a stirrup (33) fixed to the articulation (23) of the said scissor elements (20).
- A lift table according to Claim 12, characterised in that each scissor element (20) is associated with a pair of centring connecting rods (40, 50) and in that the low points (52) of the second centring connecting rods (50) are mounted on the same axle shaft (55), which is coupled to the said second actuator (60, 60').
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0609206A FR2907441B1 (en) | 2006-10-20 | 2006-10-20 | LIFTING TABLE WITH CHISEL. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1914193A1 EP1914193A1 (en) | 2008-04-23 |
EP1914193A8 EP1914193A8 (en) | 2008-06-25 |
EP1914193B1 true EP1914193B1 (en) | 2010-01-13 |
Family
ID=38055170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070360052 Expired - Fee Related EP1914193B1 (en) | 2006-10-20 | 2007-10-18 | Scissor lift |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1914193B1 (en) |
DE (1) | DE602007004274D1 (en) |
FR (1) | FR2907441B1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010012893A1 (en) * | 2010-03-26 | 2011-09-29 | Loesche Gmbh | roller mill |
US9522625B2 (en) | 2014-05-30 | 2016-12-20 | Troy A. Myers | Boat loading allignment device and method |
CN104310009B (en) * | 2014-10-10 | 2016-09-07 | 广东嘉腾机器人自动化有限公司 | A kind of charging and discharging mechanism |
US9808080B2 (en) | 2015-04-01 | 2017-11-07 | Kinder Design Inc. | Portable height-adjustable tabletop assembly and method of adjusting a height of the same |
CN106744473A (en) * | 2016-09-27 | 2017-05-31 | 王俊峰 | A kind of Liftable type Kudzu root slicing machine mobile device |
CN111232870B (en) * | 2018-11-29 | 2022-03-18 | 比亚迪股份有限公司 | Lifting platform for charging system and charging system |
CN111503484A (en) * | 2020-04-28 | 2020-08-07 | 哈尔滨工业大学 | Displacement meter fixing device used in structure or component loading test |
CN112607647A (en) * | 2020-12-14 | 2021-04-06 | 温州竺陌机械科技有限公司 | Jack with auxiliary support leg |
CN112607646A (en) * | 2020-12-14 | 2021-04-06 | 温州竺陌机械科技有限公司 | Jack with replaceable contact component |
Family Cites Families (15)
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GB326362A (en) | 1929-03-20 | 1930-03-13 | Scoffin And Willmott Ltd | Improvements in or relating to folding tables |
GB878714A (en) * | 1958-06-16 | 1961-10-04 | Amalgamated Dental Co Ltd | Hoist |
US3240529A (en) * | 1964-09-02 | 1966-03-15 | Amalgamated Dental Co Ltd | Hoist |
BE791776A (en) * | 1972-02-24 | 1973-03-16 | Trepel Ag | LIFT TABLE WITH DEFORMABLE PARALLELOGRAM |
GB1502778A (en) | 1974-12-10 | 1978-03-01 | Rogers D | Scissor lift mechanism with actuating device |
CH619671A5 (en) * | 1977-04-29 | 1980-10-15 | Geilinger Ag Metallbau | Push lifting platform |
JPS54100050A (en) * | 1978-01-24 | 1979-08-07 | Masao Akimoto | Lifter with auxiliary link |
US4194723A (en) * | 1978-04-14 | 1980-03-25 | Jlg Industries, Inc. | Scissors linkage workman's platform |
US4943204A (en) * | 1988-11-30 | 1990-07-24 | Ehrlich Rodney P | Drop frame trailer construction |
US5339749A (en) * | 1992-06-23 | 1994-08-23 | Hihasuto Seiko Co., Ltd. | Table positioning mechanism |
GB2301282B (en) | 1992-09-24 | 1997-04-09 | Snell Elizabeth | Improvements relating to surgical tables |
JPH09323896A (en) * | 1996-04-05 | 1997-12-16 | Thk Kk | Table elevating device |
JP2003081582A (en) * | 2001-09-13 | 2003-03-19 | Hitachi Constr Mach Co Ltd | Working machine workbench and using method thereof |
GB2386062B (en) * | 2002-03-07 | 2004-04-28 | Huntleigh Technology Plc | Adjustable bed |
JP4433941B2 (en) * | 2004-08-26 | 2010-03-17 | 株式会社ダイフク | Transport device |
-
2006
- 2006-10-20 FR FR0609206A patent/FR2907441B1/en not_active Expired - Fee Related
-
2007
- 2007-10-18 EP EP20070360052 patent/EP1914193B1/en not_active Expired - Fee Related
- 2007-10-18 DE DE200760004274 patent/DE602007004274D1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1914193A8 (en) | 2008-06-25 |
DE602007004274D1 (en) | 2010-03-04 |
FR2907441A1 (en) | 2008-04-25 |
FR2907441B1 (en) | 2009-06-12 |
EP1914193A1 (en) | 2008-04-23 |
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