EP1726560B1 - Table élévatrice à ciseaux - Google Patents

Table élévatrice à ciseaux Download PDF

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Publication number
EP1726560B1
EP1726560B1 EP06114130A EP06114130A EP1726560B1 EP 1726560 B1 EP1726560 B1 EP 1726560B1 EP 06114130 A EP06114130 A EP 06114130A EP 06114130 A EP06114130 A EP 06114130A EP 1726560 B1 EP1726560 B1 EP 1726560B1
Authority
EP
European Patent Office
Prior art keywords
scissor
lifting table
upper frame
engagement point
pulling means
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.)
Not-in-force
Application number
EP06114130A
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German (de)
English (en)
Other versions
EP1726560A1 (fr
Inventor
Gottfried Reymann
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Individual
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Individual
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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
    • 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 with a top frame and a scissors mechanism carrying the top frame, wherein the scissor mechanism has at least one scissor cross consisting of intersecting scissor members and the scissor members for raising or lowering the upper frame relative to each other are pivotable, wherein a drive for pivoting the scissor members to each other and is thus provided for raising or lowering the upper frame, which has a standing with two scissor members in contact traction means.
  • Scissor lift tables have long been known and are used in many ways. Frequently, the known scissor lift tables have two scissor crosses arranged parallel to one another, the scissor members of which can be pivoted relative to one another in order to raise or lower the upper frame connected to the scissors mechanism. In this arrangement, it is ensured that the plane formed by the upper frame is moved in parallel during pivoting of the scissor members.
  • Most scissor lift tables are used in automotive technology but also in logistics, for example as a mechanical lift.
  • the scissor lift tables are provided with a hydraulic drive. However, the hydraulic drive requires a fairly high maintenance. Furthermore, such systems can cause damage to leaks, soiling of products and buildings. To avoid this, additional measures, e.g. the provision of a separator, be taken. In addition, increasingly stringent environmental regulations must be met, making the use of hydraulic drives less attractive.
  • This scissor lift consists of two arranged by two between a lower and a platform covered with a top frame, formed by a pair of outer and inner shanks scissors, each connected to the lever ends via trusses and in each case two adjacent between lower and upper frame truss axes hinged to the lower and upper frame and are slidably mounted in guides of the upper and lower frame, wherein a drive unit causes the drive for the height adjustment of the scissor lift.
  • a traction means such as a traction means
  • a drawstring or a chain drive To raise, a kind of winding element is generally provided on the lifting means of the upper frame, the traction means can be wound up. By winding the traction means a force is exerted on the scissor members of the scissors cross, so that they pivot relative to each other.
  • this embodiment has the disadvantage that on the one hand bearing blocks on the ground or a corresponding subframe must be provided and that the traction means leaves the bearing blocks relatively shortly after the lifting process, so that abruptly after leaving the bearing blocks a considerably larger force are applied to the traction means must to raise the scissor lift further.
  • the EP 1 375 410 describes a scissor lift with a top frame, which is supported by two lateral shears and guided in parallel, with a lifting device which has a drivable winding device, a traction means and a plurality of pulleys for the traction means. In this embodiment, all points of attack are in the lowered state of the upper frame at a height.
  • the second point of attack is higher than the first or third point of attack at least in the lowered state of the upper frame.
  • the same inventive effect can also be achieved if the second point of attack is at least in the lowered state of the upper frame lower than the first or third point of attack in principle, an embodiment the invention, in which the second point of attack at least in the lowered state of the upper frame is higher than the first or third point of attack is simply rotated by 180 ° and be placed upside down, so that the upper frame comes to lie down to get to an embodiment in which the second point of attack is at least in the lowered state of the upper frame lower than the first or third point of attack. Therefore, if it is assumed in the following that the second point of attack is higher than the first or third point of attack at least in the lowered state of the upper frame, it is understood that it could instead be lower.
  • the traction means Since when lifting the scissor lift all attack points, since they are located on the scissor members, move up - albeit to varying degrees -, the traction means remains longer in contact with the attack points, which means a better initiation of traction power. Also, when the traction means detaches from a point of attack, the transition is less abrupt.
  • the drive has a winding shaft for winding the traction means, wherein the winding shaft is preferably fastened to a scissor member, particularly preferably to the first scissor member. This measure also leads to improved mobility of the scissor lift. There is no additional attachment of the winding shaft necessary.
  • the two longitudinal axes of the scissor members include an increase in the lifting of the upper frame opening angle, the second point at an opening angle less than 35 °, preferably less than 45 ° and more preferably less than 60 ° with the Traction means in engagement stands.
  • the second point remains during a large part of the lifting operation of the scissor lift in contact with the traction means. This has the advantage that no abrupt change in the application of force occurs.
  • the second point of attack is almost during the entire lifting process, i. also in the fully raised position of the upper frame, remains in contact with the traction means, even if in this position, the second point of attack contributes to any significant improvement in the geometry of the force more.
  • the traction means is fixed to a scissor member, preferably on the second scissor member. This measure leads to a more compact design and in particular to an increase in the mobility of the scissor lift.
  • a deflection roller is provided on a scissor member on which the traction means abuts.
  • the winding shaft could be attached to the lower end of the first scissor member and the deflection roller may be arranged at the lower end of the second scissor member.
  • the traction means would then, starting from the winding shaft of one scissor member, be guided via the deflection roller on the other scissor member to a fixed point on one of the scissor members. Now, if the winding shaft is actuated, this leads to the fact that the two ends of the different scissor members are moved toward each other by the winding of the traction means.
  • a further advantageous embodiment provides that the traction means, starting from the fixation on the scissor member, first over the third point of attack, then over the second point of attack, then over the first point of attack, then guided over the pulley and finally to the winding shaft.
  • This arrangement has proven to be particularly effective for the introduction of force from the traction means on the scissors cross.
  • the scissor lift can be realized with a single scissors cross
  • two scissor crosses or two double scissor crosses are preferably provided, which are arranged substantially parallel to each other.
  • the stability the upper frame significantly improved.
  • even more scissor crosses can be provided behind or next to each other in order to realize even large scissor lift lengths or widths.
  • the use of several scissor crosses over each other, ie the use of double scissor crosses or multi-scissor crosses, increases the achievable lifting heights.
  • a locking device is provided, which in the locked state, a pivoting of the scissor members to each other to lower the upper frame, prevented.
  • the locking device is coupled to the traction means, so that when tearing the traction means, the locking device locks the scissor lift. If it comes due to improper handling of the scissor lift to damage the traction device, so that it ruptures during operation, the automatically locking locking device prevents a sudden "crashes" of the upper frame.
  • the locking device on a lever which is fixed to the one scissor member, and a detent having a plurality of detent positions, which is attached to the other scissor member, wherein the lever rests on the traction means in operation and upon tearing of the traction means gravity falls into a detent position of the catch.
  • FIG. 1 is a partial view of an embodiment of the scissor lift 1 shown.
  • the scissor lift 1 has a top frame 2, which is supported by a scissors mechanism.
  • the scissors mechanism consists of two scissor crosses, each having two scissor members 3, 4.
  • the view shows only a pair of scissors.
  • the second scissor member 3 is connected to a pivot axis 11 with the upper frame 2.
  • the first scissor member 4 has at its the upper frame 2 end facing a roller 12, on the the upper frame 2 rests movably.
  • the two scissor members 3, 4 are connected to each other at the pivot axis 6.
  • FIG. 2 is a side view of the scissor lift 1 to recognize in the lowered state. It can be seen that at the lower end of the first scissor member 4, a winding shaft 13 is arranged. Furthermore, a deflection roller 14 is provided at the lower end of the second scissor member 3. The winding shaft 13 serves to receive a traction means.
  • the traction means which may for example consist of a drawstring, a rope or a chain, starting from the winding shaft 13 via a tension roller 15 first to the deflection roller 14. From there, the traction means initially reaches the first engagement member 4 connected to the first point of attack on the shaft or roller 10 is located.
  • the traction means 7 reaches the roller 9 on the second scissor member 3, which provides the second point of application.
  • the traction means reaches the roller 8 on the first scissor member 4, which provides the third point of application, and ends at the attachment 5, which provides a firm connection between traction means 7 on the one hand and scissor member 3 on the other.
  • the second engagement point which remains in engagement, ensures that there is improved power transmission.
  • the two scissor members form an opening angle ⁇ , which increases with lifting of the scissor lift.
  • the second point or the roller 9 is up to a maximum opening angle with the traction means 7 in contact.
  • the points of engagement need not necessarily be provided by additional rollers or rollers. So it would be conceivable, for example, to dispense with the rollers 8 and 9. In this case, the guide roller 14 would provide the first point of application, the roller 10 the second point of attack and the attachment 5 the third point of application. It would also be possible to dispense with the roller 10 instead, so that the roller 9 provides the first, the roller 8 the second and the attachment 5, the third point of application.
  • FIGS. 3 to 5 show partial views from above or from the side, which illustrate the course of the traction means 7.
  • the scissor lift table can be used both for normal lifting operation and as an installation platform.
  • the winding shaft 13 is preferably driven by an electric gear motor.
  • the traction means is preferably formed by a belt.
  • the various pulleys, rollers and support rollers are arranged to move substantially in the vertical direction so that an effective force component is achieved.
  • the arrangement of the points of attack or deflection rollers is such that, in principle, over almost the entire stroke range, the support via the second point of application or the deflection roller 9 is maintained.
  • FIGS. 2 and 3 An alternative exemplary arrangement is shown in FIGS FIGS. 2 and 3 indicated by dashed lines on the left. This arrangement has the advantage that the drive can be easily maintained.
  • FIGS. 6 to 10 is a second embodiment of a scissor lift 1 'shown. As far as possible, the same reference numbers have been used for the same elements.
  • the attachment 5 of the traction means 7 is provided here on the roller 8. All other elements are identical to those in the FIGS. 1 to 5 shown embodiment.
  • FIGS. 11 to 15 3 shows a third embodiment of the scissor-type lifting table 1 ", where the same reference numbers have been used for the same elements as far as possible FIGS. 1 to 5 shown embodiment in that a locking device 16 to 20 is provided.
  • the locking device consists of a lever 16 and a catch 20.
  • the lever 16 is attached via the pivot axis 17 to the one scissor member 4.
  • the lever 16 has a lever roller 19 and a lever tip 18.
  • the lever roller 19 rests on the traction means 7.
  • a catch 20 with different locking positions is arranged on the other scissor member 3.
  • the lever 16 is no longer held due to the contact between the lever roller 19 on the one hand and the traction means 7 on the other hand in the raised position, but pivots in the direction of arrow due to gravity, so that the lever tip 18th engages in one of the locking positions of the catch 20 and thus provides a locking of the two scissor members to each other.
  • the upper frame 2 can then not be lowered further.
  • a plurality of pairs of scissors members can be arranged side by side or one above the other.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Knitting Machines (AREA)

Claims (12)

  1. Plate-forme élévatrice à ciseaux (1) comprenant un bâti supérieur (2) et un des mécanismes à ciseaux supportant le bâti supérieur (2), le mécanisme à ciseaux présentant au moins un croisement de ciseaux existant où se croisent les éléments de ciseaux (3, 4) et lesdits éléments de ciseaux (3, 4) peuvent pivoter l'un par rapport à l'autre autour d'un axe de pivotement (6), permettant ainsi de lever ou abaisser le bâti supérieur (2), de sorte qu'un actionnement destiné à faire pivoter les éléments de ciseaux (3, 4) les uns par rapport aux autres est prévu dans le but de lever ou abaisser le bâti supérieur (2), lequel, présente un mécanisme de traction (7) restant en contact avec les deux éléments de ciseaux, et le mécanisme de traction (7) est disposé au moins dans un état abaissé du bâti supérieur (2), successivement avec un premier point de contact (10), qui est disposé sur le premier élément de ciseaux (4), avec un deuxième point de contact (9) qui est disposé sur le deuxième élément de ciseaux (3) et un troisième point de contact (8) qui est disposé sur le premier élément de ciseaux (4), est en contact et est caractérisé en ce que, le deuxième point de contact (9) est situé au moins à l'état abaissé du bâti supérieur (2) en situation plus élevée ou plus basse que le premier ou troisième point de contact (8, 10), tous les points de contact se déplaçant différemment au cours du levage de la plate-forme élévatrice à ciseaux.
  2. Plate-forme élévatrice à ciseaux (1) selon la revendication 1, caractérisée en ce que l'actionnement présente un arbre d'enroulement (13) permettant l'enroulement du mécanisme de traction (7), de sorte que l'arbre d'enroulement (13) est fixé de préférence, sur un élément de ciseaux (3, 4) et idéalement sur le premier élément de ciseaux (4).
  3. Plate-forme élévatrice à ciseaux (1) selon la revendication 1 ou 2, caractérisée en ce que, au moins à l'état abaissé du bâti supérieur (2), le premier point de contact, le deuxième point de contact et le troisième point de contact sont disposés en position horizontale sur le même côté de l'axe de pivotement (6).
  4. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 3, caractérisée en ce que les deux axes longitudinaux des éléments de ciseaux (3, 4) définissent un angle d'ouverture (α) qui s'agrandit lors du levage du bâti supérieur (2), de sorte que le deuxième point de contact pour un angle d'ouverture (α) inférieur à 35°, de préférence inférieur à 45° et idéalement inférieur à 60°, est en prise avec le mécanisme de traction (7).
  5. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 4, caractérisée en ce que le mécanisme de traction (7) est fixé sur un élément de ciseaux (3, 4) et de préférence, sur un deuxième élément de ciseaux (3).
  6. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 5, caractérisée en ce qu'une poulie de renvoi (14) est prévue sur un élément de ciseaux et sur laquelle le mécanisme de traction est en contact.
  7. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 5 ou 6, caractérisée en ce que le mécanisme de traction (7), à partir de l'immobilisation sur l'élément de ciseaux (3, 4) est amené d'abord au-dessus du troisième point de contact, ensuite, au-dessus du deuxième point de contact, puis au-dessus du premier point de contact et finalement au-dessus de la poulie de renvoi jusqu'à l'arbre d'enroulement.
  8. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 7, caractérisée en ce que deux croisements de ciseaux sont prévus, lesquels sont agencés de façon sensiblement parallèle l'un par rapport à l'autre.
  9. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 8, caractérisée en ce qu'aucun bâti inférieur n'est prévu mais en ce que l'extrémité inférieure de l'élément de ciseaux (3, 4) se trouve directement sur le sol.
  10. Plate-forme élévatrice à ciseaux (1) selon l'une des revendications 1 à 9, caractérisée en ce qu'un dispositif d'arrêt est prévu, lequel, à l'état d'arrêt, empêche un pivotement des éléments de ciseaux les uns par rapport aux autres autour des bâtis supérieurs.
  11. Plate-forme élévatrice à ciseaux (1) selon la revendication 10, caractérisée en ce que le dispositif d'arrêt est couplé avec le mécanisme de traction afin qu'en cas de rupture du mécanisme de traction, le dispositif d'arrêt bloque la plate-forme élévatrice à ciseaux.
  12. Plate-forme élévatrice à ciseaux (1) selon la revendication 11, caractérisée en ce que le dispositif d'arrêt présente un levier, qui est fixé à un élément de ciseaux et un cran à plusieurs positions d'encliquetage, qui est fixé sur l'autre élément de ciseaux de sorte que, le levier en fonctionnement repose sur le mécanisme de traction et en ce que le cran, en cas de rupture du mécanisme de traction en raison de la force de gravité, se mette une position d'encliquetage.
EP06114130A 2005-05-27 2006-05-18 Table élévatrice à ciseaux Not-in-force EP1726560B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005024289A DE102005024289A1 (de) 2005-05-27 2005-05-27 Scherenhubtisch

Publications (2)

Publication Number Publication Date
EP1726560A1 EP1726560A1 (fr) 2006-11-29
EP1726560B1 true EP1726560B1 (fr) 2011-03-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06114130A Not-in-force EP1726560B1 (fr) 2005-05-27 2006-05-18 Table élévatrice à ciseaux

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EP (1) EP1726560B1 (fr)
AT (1) ATE503716T1 (fr)
DE (2) DE102005024289A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9961989B2 (en) 2016-03-07 2018-05-08 Marc Stefan Witt Radial scissor lift table and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012006745B4 (de) * 2012-04-04 2016-04-14 Karl-Heinz Schmezer Scherenhubtisch
DE102012223869A1 (de) * 2012-12-19 2014-06-26 Elena Albrecht Scherenhubtisch flacher Bauweise
CN113880005A (zh) * 2021-10-27 2022-01-04 重庆银河试验仪器有限公司 一种三综合试验箱的升降行走机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432159A (en) * 1922-10-17 davis
US1817418A (en) * 1929-02-18 1931-08-04 Arthur T Munns Elevator
US3785462A (en) * 1972-06-23 1974-01-15 Applied Radiation Corp Scissor lift and drive mechanism therefor
DE2635197A1 (de) * 1976-08-05 1978-02-09 Trepel Ag Scherenhebetisch
DE10228168A1 (de) 2002-06-24 2004-01-22 Trepel GmbH, Hebe- und Fördertechnik Scherenhebetisch
DE10314967A1 (de) * 2003-04-02 2004-10-28 Flexlift-Hubgeräte GmbH Scherenhubtisch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9961989B2 (en) 2016-03-07 2018-05-08 Marc Stefan Witt Radial scissor lift table and method

Also Published As

Publication number Publication date
EP1726560A1 (fr) 2006-11-29
ATE503716T1 (de) 2011-04-15
DE102005024289A1 (de) 2006-11-30
DE502006009189D1 (de) 2011-05-12

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