EP1135323B1 - Scissor-type lift table - Google Patents

Scissor-type lift table Download PDF

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Publication number
EP1135323B1
EP1135323B1 EP99966839A EP99966839A EP1135323B1 EP 1135323 B1 EP1135323 B1 EP 1135323B1 EP 99966839 A EP99966839 A EP 99966839A EP 99966839 A EP99966839 A EP 99966839A EP 1135323 B1 EP1135323 B1 EP 1135323B1
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EP
European Patent Office
Prior art keywords
scissor
elements
lifting platform
upper frame
type lifting
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EP99966839A
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German (de)
French (fr)
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EP1135323A2 (en
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Eckhardt Penzek
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Individual
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Individual
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065Scissor linkages, i.e. X-configuration

Definitions

  • the invention relates to a scissor lift, according to the preamble of claim 1, with a lower frame, a one Tischebene forming upper frame and one between the lower frame and the upper frame acting scissor mechanism, wherein the scissors mechanism includes intersecting inner and outer scissor limbs which are for lifting or Lowering the upper frame by means of a drive can be actuated.
  • Scissor lift tables have been known in practice for many years. Merely as an example This is also the DE-AS 11 75 852 and the registered documents of the German Utility Model 79 32 713 referenced. The drives disclosed there in addition to which the scissor members act with force acting Anstellorgan to the prior art and will not be discussed further below.
  • the present invention is based on the object, to design and develop a scissor lift of the generic type in such a way that a one-sided or asymmetrical overhang of the table level also is effectively avoided when raised scissor mechanism.
  • a generic scissor lift is characterized that the scissor members with all free ends in the frame assigned Run guide rails and that the entire scissor mechanism by means of a between the scissor mechanism and the frame acting steering device such can be positioned that they at least largely in each angular position of the scissor members is positioned centrally to or below the upper frame.
  • the entire Scissor mechanism by means of a between the scissor mechanism and the frame acting steering device at freely movable ends of the scissor members such can be positioned so that they at least in each angular position of the scissor members largely in the middle or under the upper frame and thus below the table level is positioned.
  • the steering device thus acts as a kind of anchor and positioned the scissor mechanism centered regardless of the lifting state of the scissors mechanism below the table level, namely by positioning the crossing points of the Scissor links exactly centered under or over the frame.
  • the steering device could be at least one between one of Scissor links and a fixed upper pivot point extending to the upper frame Have steering arm. In that regard, the central positioning would be opposite guaranteed the upper frame. Furthermore, it is possible that the steering device at least one between one of the scissor links and a fixed one includes lower pivot point on the lower frame extending steering arm. at Provision of a total of two steering arms - to connect on the one hand with the upper frame and the other with the lower frame - could this one be assigned to single scissor link. It is also conceivable, the steering arms a Assign a pair of scissor links, in an advantageous manner the outer Scissor links, resulting in an unobstructed outer arrangement of the steering arms results.
  • the provided on the frame articulation points are in an advantageous manner in about formed centrally on the upper frame and on the lower frame.
  • a Centering of the crossing points of the scissor limbs then at least centrally under the Tische level or under the upper frame, although the steering arm in about the center between the free ends of the scissor members and the point of intersection of the scissor members is hinged to the respective scissors joint.
  • an eccentric arrangement of the scissors mechanism under the table level to realize, whereby it is also essential that the position of the Scissors mechanism under the table level to no lifting situation of the scissor lift table changed. This means that one on the scissor lift exactly below the Scissors mechanism positioned object always exactly under the scissors mechanism remains without "wandering" outside during the stroke. Unfavorable power relations or lever arms can not arise in any case.
  • the scissor mechanism are at the free ends of the scissors members rollers arranged, which run in the guide rails of the frame. These roles can be designed such that they are forcibly guided in the guide rails. Any embodiments of the guide rails and the coordinated Roles are conceivable.
  • the guide rails could extend over the entire width of the frame extend, wherein the articulation points for the steering arms side of the guide rails or may be formed on the frame itself. Likewise, it is also conceivable that on both sides of the articulation points to the edge region of the frame extending guide rails are arranged, wherein the stroke of the scissor mechanism thereby limited is how far the guide rails extend to the articulation point or the center. In that regard, the guide rails to the central articulation point out a Hubbegrenzung or have a stop. This applies both in terms of the upper frame as well as in relation to the lower frame.
  • FIGS. 1 to 3 together show a scissor lift table according to the invention a lower frame 1, a table level 2 forming an upper frame. 3 and one acting between the lower frame 1 and the upper frame 3 Scherenmechanik 4, wherein the scissor mechanism 4 intersecting inner and outer scissor members 5, 6, which for raising or lowering the upper Frame 3 and the table level 2 by means of a drive not shown in the figures are operable.
  • the scissor members 5, 6 run with all the free ends 7 in FIG the frame 1, 3 permanently associated guide rails 8.
  • the entire scissors mechanism 4 is by means of a between the scissors mechanism 4 and the frame 1, 3rd acting steering device 9 can be positioned so that they are in any angular position the scissor members 5, 6 at least substantially centrally to or below the upper Frame 3 and thus positioned below the table level 2.
  • Figs. 1 and 2 show particularly clearly that the steering device 2 is between the scissor members 6 and fixed pivot points 10, 11 extending Steering arms 12 includes. These steering arms 12 are pivotally connected to the upper Anlenkstelle 10 and the lower pivot point 11 connected, so for example. About fixed Joint axes 13. The steering arms 12 are equally rotationally fixed with the outer Scissor members 6 connected, and also about fixed hinge axes 14th
  • Figs. 1 and 2 can be further seen that the upper pivot point 10 and the lower pivot point 11 centrally on the upper frame 3 and the lower frame. 1 are formed. Furthermore, it can be clearly seen that the steering arms 12 in about centrally between the free ends 7 of the outer scissor members 6 and the crossing point 15 of the scissor members 5, 6 hinged to the respective scissor member 6 are.
  • the figures show that at the free ends 7 of the scissor members 5, 6 rollers 16 are arranged in the guide rails 8 of the frame 1, 3 run.
  • the guide rails 8 are formed divided and extend on both sides of the articulation points 10, 11 up to the edge region of the frame 1, 3, whereby a stroke limitation is realized.
  • the scissor lift shown in Figures 4 to 7 consists essentially of a the lifting material to be picked up plate 116 and one at the bottom of the Plate 116 connected scissors-like erector, the first Scissor legs 103 and second scissor legs 106 is.
  • the first Scissor legs 103 are pivotally mounted at the upper end 105 and on lower end 104 on a guide rail 102 via, for example, a roller 117th horizontally movable.
  • Guideways guide elements 109 attached, which, as Figs. 4 and 7 show, disposed within the second scissor legs 106 are in contrast
  • the prior art DE 34 34 130 A1
  • guideways are arranged between the inner and the outer scissor legs.
  • An upper horizontally disposed guide rail 113 serves to guide, for example with a roller 118, the second scissor leg 106, the lower End 108 are pivotally mounted.
  • a carriage 110 arranged in the longitudinal direction of the second scissor legs 106th can be moved by means of a drive 112. This happens in the illustrated Example with the help of a roller 119.
  • the drive 112 an electric motor, which has a spindle 111 is connected to the carriage 110.
  • a hydraulic Provide drive in which case between the drive and carriage 110, a piston rod (not drawn) would be present.
  • a pneumatic Drive 112 where would also work with a piston rod.
  • Fig. 5 the home position, i. a lowered lifting table 101, shown.
  • the Roller 119 of the carriage 110 stands at the beginning of the guide element 109, which is in This case has a special wedge-shaped design, with little force the dead center to be able to move the lifting table 101, which is only a relative weak dimensioned electric motor (1.5 kw) required.
  • the Drive 112 After switching on the Drive 112 is moved via the spindle 111 of the carriage 110 along the Guide element 109 pulled until, for example, the position is reached, as in Fig. 6 is shown. If the engine operates at a constant speed, the Lifting table 101 raised evenly or - with changed direction of rotation - lowered.
  • the guide member 109 may be in its path on which the carriage 110 is running, be designed arbitrarily and actually depends only on which movement of the Another example may be mentioned that the guide elements 109 wedge-shaped in Triangular shape can be formed. They can also be arbitrary in their course be designed linear or non-linear.
  • the essence of the invention is therefore that a flat design for a lift table 101 is achieved because of the special measures according to the Invention, guide member 109 and associated carriage 110, a weak dimensioned (electric) drive can be selected.
  • each lift table 101 has a drive 112.
  • the spindle 111 are led out of the lifting table 101 and be connected via a bevel gear with a common drive, all moved lifting tables 101 moves.

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  • Life Sciences & Earth Sciences (AREA)
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  • Accommodation For Nursing Or Treatment Tables (AREA)
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  • Forklifts And Lifting Vehicles (AREA)
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Abstract

The invention relates to a scissor-type lift table comprising a lower frame (1), an upper frame (3) which forms a table plane (2), and a scissor-type mechanism (4) which operates between the lower frame (1) and the upper frame (3). The scissor-type mechanism (4) comprises intersecting inner and outer scissor-type elements (5, 6) which can be actuated by a drive and which are provided for lifting and lowering the upper frame (3). The inventive scissor-type lift table prevents a one-sided or asymmetrical overhang of the table plane (2) when the scissor-type mechanism (4) is running up. The invention is characterized in that the scissor-type elements (5, 6) run with all free ends (7) thereof in the guide rails (8) assigned in a fixed manner to the frames (1, 3), and in that the entire scissor-type mechanism (4) can be positioned by a guide device (9), said guide device operating between the scissor-type mechanism (4) and the frames (1, 3), in such a way that scissor-type mechanism (4) is positioned at each angular position of the scissor-type elements (5, 6) at least in a largely centrical manner in relation to or under the upper frame (3).

Description

Die Erfindung betrifft einen Scherenhubtisch, gemäß dem Oberbegriff von Anspruch 1, mit einem unteren Rahmen, einem eine Tischebene bildenden oberen Rahmen und einer zwischen dem unteren Rahmen und dem oberen Rahmen wirkenden Scherenmechanik, wobei die Scherenmechanik sich kreuzende innere und äussere Scherenglieder umfasst, die zum Anheben oder Absenken des oberen Rahmens mittels eines Antriebs betätigbar sind.The invention relates to a scissor lift, according to the preamble of claim 1, with a lower frame, a one Tischebene forming upper frame and one between the lower frame and the upper frame acting scissor mechanism, wherein the scissors mechanism includes intersecting inner and outer scissor limbs which are for lifting or Lowering the upper frame by means of a drive can be actuated.

Ein derartiger Scherenhubtisch ist aus der DE-A-4 430 543 bekannt. DerartigeSuch a scissor lift is known from DE-A-4 430 543. such

Scherenhubtische sind seit vielen Jahren aus der Praxis bekannt. Lediglich beispielhaft wird hierzu auch auf die DE-AS 11 75 852 sowie auf die eingetragenen Unterlagen des deutschen Gebrauchsmusters 79 32 713 verwiesen. Die dort offenbarten Antriebe nebst dem die Scherenglieder mit Kraft beaufschlagenden Anstellorgan gehören zum Stand der Technik und werden nachfolgend nicht weiter erörtert.Scissor lift tables have been known in practice for many years. Merely as an example This is also the DE-AS 11 75 852 and the registered documents of the German Utility Model 79 32 713 referenced. The drives disclosed there in addition to which the scissor members act with force acting Anstellorgan to the prior art and will not be discussed further below.

Aus der DE 196 49 867 A1 ist ein gattungsbildender Scherenhubtisch bekannt, bei dem die freien Enden der Scherenglieder auf einer Seite über feste Gelenkachsen mit dem oberen und dem unteren Rahmen schwenkbar verbunden sind. Auf der anderen Seite sind die freien Enden der Scherenglieder mit Rollen ausgestattet und laufen in dem oberen Rahmen und dem unteren Rahmen zugeordneten Führungsschienen. Wird die Scherenmechanik durch den dort vorgesehenen Getriebemotor aufgerichtet, verbleiben die mit festen Gelenkachsen versehenen Enden der Scherenglieder auf der einen Seite der beiden Rahmen ortsfest. Die gegenüberliegenden freien Enden der Scherenglieder rollen beim Aufrichten der Scherenmechanik zur Mitte hin, nähern sich demnach den - bezogen auf die beiden Rahmen - ortsfesten Enden der Scherenglieder, wodurch sich die Aufrichtbewegung und somit das Anheben der Tischebene ergibt.From DE 196 49 867 A1 a generic Scherenhubtisch is known at the free ends of the scissor links on one side over fixed hinge axes are pivotally connected to the upper and the lower frame. On the other Side, the free ends of the scissor links are equipped with rollers and run in the upper frame and the lower frame associated guide rails. If the scissor mechanism by the gear motor provided there erect, remain the fixed joint axes provided ends of the scissor members stationary on one side of the two frames. The opposite free ends of the scissor members roll when erecting the scissor mechanism to Center, approaching - according to the two frames - stationary Ends of the scissor links, causing the Aufrichtbewegung and thus the lifting the table level results.

Der gattungsbildende Scherenhubtisch ist in der Praxis jedoch insbesondere dann problematisch, wenn schwere Lasten um eine ganz erhebliche Höhe bzw. um einen ganz erheblichen Hub der Scherenmechanik zu heben sind. In einem solchen Falle entsteht auf der Seite des Rahmens, auf der die freien Enden der Scherenglieder mit Rollen ausgestattet sind, ein ganz erheblicher Überhang des oberen Rahmens bzw. der Tischebene, wodurch eine Instabilität der Tischebene hervorgerufen wird. Ein in der unteren Position der Scherenmechanik mittig positionierter schwerer Gegenstand befindet sich nach vollem Hub weit ausserhalb der Mitte der Scherenmechanik, so dass ganz erhebliche Kräfte über unvertretbar grosse Hebelarme auf die Mechanik wirken. Diese dann auftretende Belastung kann zu einem Kippen des gesamten Scherenhubtischs oder gar zu einer mechanischen Deformation von Bauteilen führen. Jedenfalls werden einzelne Bauteile oder Baugruppen des Scherenhubtischs in einem solchen Masse belastet, dass die Lebensdauer des gesamten Scherenhubtischs ganz erheblich reduziert ist.The generic Scherenhubtisch is in practice, however, in particular problematic when heavy loads at a very considerable height or one quite considerable stroke of the scissor mechanism are to lift. In such a case arises on the side of the frame on which the free ends of the scissor links with Rollers are equipped, a very substantial overhang of the upper frame or the table level, causing instability of the table level. An in the lower position of the scissor mechanism centrally positioned heavy object is located after full stroke far out of the middle of the scissors mechanism, so that quite significant forces over unacceptably large lever arms on the mechanics Act. This then occurring stress can lead to a tilting of the entire Scissor lift or even lead to a mechanical deformation of components. In any case, individual components or assemblies of the scissor lift in loaded such a mass that the life of the entire scissor lift is considerably reduced.

Ausgehend von der voranstehend geschilderten Problematik bei einem gattungsbildenden Scherenhubtisch liegt der vorliegenden Erfindung nun die Aufgabe zugrunde, einen Scherenhubtisch der gattungsbildenden Art derart auszugestalten und weiterzubilden, dass ein einseitiger bzw. asymmetrischer Überhang der Tischebene auch bei hochgefahrener Scherenmechanik wirksam vermieden ist.Based on the above-described problem in a generic Scissor lift table, the present invention is based on the object, to design and develop a scissor lift of the generic type in such a way that a one-sided or asymmetrical overhang of the table level also is effectively avoided when raised scissor mechanism.

Die voranstehende Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Danach ist ein gattungsbildender Scherenhubtisch dadurch gekennzeichnet, dass die Scherenglieder mit sämtlichen freien Enden in den Rahmen fest zugeordneten Führungsschienen laufen und dass die gesamte Scherenmechanik mittels einer zwischen der Scherenmechanik und den Rahmen wirkenden Lenkeinrichtung derart positionierbar ist, dass sie in jeder Winkelstellung der Scherenglieder zumindest weitgehend mittig zu bzw. unter dem oberen Rahmen positioniert ist.The above object is solved by the features of claim 1. Thereafter, a generic scissor lift is characterized that the scissor members with all free ends in the frame assigned Run guide rails and that the entire scissor mechanism by means of a between the scissor mechanism and the frame acting steering device such can be positioned that they at least largely in each angular position of the scissor members is positioned centrally to or below the upper frame.

Erfindungsgemäss ist erkannt worden, dass das Problem eines einseitigen Überhangs bei hochgefahrener Scherenmechanik darauf zurückzuführen ist, dass gattungsbildende Scherenhubtische einseitig über feste Gelenkachsen mit dem oberen und unteren Rahmen verbunden sind. Beim Hochfahren entsteht auf der gegenüberliegenden Seite ein Überhang, der ungünstige Kräfteverhältnisse insbesondere bei schweren Lasten schafft. In weiter erfindungsgemässer Weise ist erkannt worden, dass man einen solchen einseitigen Überhang dadurch vermeiden kann, dass die Scherenglieder mit ihren freien Enden beidseitig ortsveränderlich mit dem oberen und dem unteren Rahmen verbunden sind, sofern die freien Enden in Führungsschienen der beiden Rahmen gewissermassen frei laufen können. Des weiteren ist erkannt worden, dass dabei eine mittige Positionierung der Scherenmechanik zu einer unveränderten Lage der zu hebenden Last bezogen auf die Scherenmechanik führt.According to the invention, it has been recognized that the problem of a one-sided overhang in the case of a high scissor mechanism, this is due to the fact that generic Scissor lift tables on one side over fixed joint axes with the upper one and lower frames are connected. When booting arises on the opposite Side an overhang, the unfavorable balance of power especially at creates heavy loads. In further inventive manner has been recognized that one can avoid such a one-sided overhang, that the Scissor limbs with their free ends movable on both sides with the upper and the lower frame are connected, provided the free ends in guide rails the two frames can run free in a sense. Furthermore, it is been recognized that while a central positioning of the scissor mechanism to an unchanged position of the load to be lifted in relation to the scissors mechanism leads.

Dies wird in erfindungsgemässer Weise dadurch erreicht, dass die gesamte Scherenmechanik mittels einer zwischen der Scherenmechanik und dem Rahmen wirkenden Lenkeinrichtung bei frei beweglichen Enden der Scherenglieder derart positionierbar ist, dass sie in jeder Winkelstellung der Scherenglieder zumindest weitgehend mittig bzw. unter dem oberen Rahmen und somit unter der Tischebene positioniert ist. Die Lenkeinrichtung wirkt demnach wie eine Art Anker und positioniert die Scherenmechanik ungeachtet des Hubzustandes der Scherenmechanik mittig unter der Tisch-ebene, nämlich durch Positionierung der Kreuzungspunkte der Scherenglieder exakt mittig unter bzw. über den Rahmen. Die Entstehung eines einseitigen Überhangs ist durch Realisierung beidseitiger Loslager wirksam vermieden, so dass mittig positionierte Lasten ungeachtet des Hubzustandes für den erfindungsgemässen Scherenhubtisch unproblematisch sind.This is achieved in accordance with the invention in that the entire Scissor mechanism by means of a between the scissor mechanism and the frame acting steering device at freely movable ends of the scissor members such can be positioned so that they at least in each angular position of the scissor members largely in the middle or under the upper frame and thus below the table level is positioned. The steering device thus acts as a kind of anchor and positioned the scissor mechanism centered regardless of the lifting state of the scissors mechanism below the table level, namely by positioning the crossing points of the Scissor links exactly centered under or over the frame. The emergence of a one-sided Overhang is effectively avoided by realizing bilateral floating bearings, so that centrally positioned loads regardless of the lifting state for the inventive Scissor lift are unproblematic.

Im Konkreten könnte die Lenkeinrichtung mindestens einen sich zwischen einem der Scherenglieder und einer ortsfesten oberen Anlenkstelle am oberen Rahmen erstreckenden Lenkarm aufweisen. Insoweit wäre die mittige Positionierung gegenüber dem oberen Rahmen gewährleistet. Des weiteren ist es möglich, dass die Lenkeinrichtung mindestens einen sich zwischen einem der Scherenglieder und einer ortsfesten unteren Anlenkstelle am unteren Rahmen erstreckenden Lenkarm umfasst. Bei Vorkehrung von insgesamt zwei Lenkarmen - zur Verbindung einerseits mit dem oberen Rahmen und andererseits mit dem unteren Rahmen - könnten diese einem einzigen Scherenglied zugeordnet sein. Ebenso ist es denkbar, die Lenkarme einem Paar von Scherengliedern zuzuordnen, und zwar in vorteilhafter Weise den äusseren Scherengliedern, wodurch sich eine unbehinderte äussere Anordnung der Lenkarme ergibt.In concrete terms, the steering device could be at least one between one of Scissor links and a fixed upper pivot point extending to the upper frame Have steering arm. In that regard, the central positioning would be opposite guaranteed the upper frame. Furthermore, it is possible that the steering device at least one between one of the scissor links and a fixed one includes lower pivot point on the lower frame extending steering arm. at Provision of a total of two steering arms - to connect on the one hand with the upper frame and the other with the lower frame - could this one be assigned to single scissor link. It is also conceivable, the steering arms a Assign a pair of scissor links, in an advantageous manner the outer Scissor links, resulting in an unobstructed outer arrangement of the steering arms results.

An dieser Stelle sei angemerkt, dass die Vorkehrung zweier Lenkarme zur Positionierung der Scherenmechanik gegenüber dem unteren Rahmen und gegenüber dem oberen Rahmen ausreicht. Zur Realisierung einer besonders stabilen Ausgestaltung könnten jedoch ohne weiteres auch zwei Paare von Lenkarmen vorgesehen sein, die dann beide den äusseren Scherengliedern - paarweise - zugeordnet sind. Eine beidseitige Stabilsierung bzw. Zentrierung der Scherenmechanik ist dabei realisiert.It should be noted that the provision of two steering arms for positioning the scissors mechanism against the lower frame and opposite the upper frame is sufficient. To realize a particularly stable design However, two pairs of steering arms could easily be provided, the then both of the outer scissor links - in pairs - are assigned. A Stabilization on both sides or centering of the scissors mechanism is realized.

Die an den Rahmen vorgesehenen Anlenkstellen sind in vorteilhafter Weise in etwa mittig am oberen Rahmen und am unteren Rahmen ausgebildet. Insoweit erfolgt eine Zentrierung der Kreuzungsstellen der Scherenglieder dann jedenfalls mittig unter der Tischebene bzw. unter dem oberen Rahmen, wenn auch der Lenkarm in etwa mittig zwischen den freien Enden der Scherenglieder und dem Kreuzungspunkt der Scherenglieder an das jeweilige Scherengelenk angelenkt ist. Selbstverständlich ist es auch möglich, eine aussermittige Anordnung der Scherenmechanik unter der Tischebene zu realisieren, wobei auch dabei wesentlich ist, dass sich die Position der Scherenmechanik unter der Tischebene zu keiner Hubsituation des Scherenhubtischs verändert. Dies bedeutet, dass ein auf dem Scherenhubtisch exakt unter der Scherenmechanik positionierter Gegenstand stets exakt unter der Scherenmechanik verbleibt, ohne im Verlaufe des Hubs nach aussen zu "wandern". Ungünstige Kraftverhältnisse bzw. Hebelarme können dabei jedenfalls nicht entstehen.The provided on the frame articulation points are in an advantageous manner in about formed centrally on the upper frame and on the lower frame. In that regard, a Centering of the crossing points of the scissor limbs then at least centrally under the Tische level or under the upper frame, although the steering arm in about the center between the free ends of the scissor members and the point of intersection of the scissor members is hinged to the respective scissors joint. Of course it is also possible, an eccentric arrangement of the scissors mechanism under the table level to realize, whereby it is also essential that the position of the Scissors mechanism under the table level to no lifting situation of the scissor lift table changed. This means that one on the scissor lift exactly below the Scissors mechanism positioned object always exactly under the scissors mechanism remains without "wandering" outside during the stroke. Unfavorable power relations or lever arms can not arise in any case.

In weiter vorteilhafter Weise, insbesondere zur Realisierung einer leichten Betätigbarkeit der Scherenmechanik, sind an den freien Enden der Scherenglieder Rollen angeordnet, die in den Führungsschienen der Rahmen laufen. Diese Rollen können dabei derart ausgebildet sein, dass sie in den Führungsschienen zwangsgeführt sind. Beliebige Ausgestaltungen der Führungsschienen und der darauf abgestimmten Rollen sind denkbar.In a further advantageous manner, in particular for realizing easy operability the scissor mechanism, are at the free ends of the scissors members rollers arranged, which run in the guide rails of the frame. These roles can be designed such that they are forcibly guided in the guide rails. Any embodiments of the guide rails and the coordinated Roles are conceivable.

Die Führungsschienen könnten sich über die gesamte Breite des Rahmens hinweg erstrecken, wobei die Anlenkstellen für die Lenkarme seitlich der Führungsschienen oder am Rahmen selbst ausgebildet sein können. Ebenso ist es auch denkbar, dass beidseits der Anlenkstellen bis zum Randbereich der Rahmen erstreckende Führungsschienen angeordnet sind, wobei der Hub der Scherenmechanik dadurch begrenzt ist, wieweit sich die Führungsschienen zur Anlenkstelle bzw. zur Mitte hin erstrecken. Insoweit könnten die Führungsschienen zur mittigen Anlenkstelle hin eine Hubbegrenzung bzw. einen Anschlag aufweisen. Dies gilt sowohl in Bezug auf den oberen Rahmen als auch in Bezug auf den unteren Rahmen. The guide rails could extend over the entire width of the frame extend, wherein the articulation points for the steering arms side of the guide rails or may be formed on the frame itself. Likewise, it is also conceivable that on both sides of the articulation points to the edge region of the frame extending guide rails are arranged, wherein the stroke of the scissor mechanism thereby limited is how far the guide rails extend to the articulation point or the center. In that regard, the guide rails to the central articulation point out a Hubbegrenzung or have a stop. This applies both in terms of the upper frame as well as in relation to the lower frame.

Es gibt nun verschiedene Möglichkeiten, die Lehre der vorliegenden Erfindung in vorteilhafter Weise auszugestalten und weiterzubilden. Dazu ist einerseits auf die dem Patentanspruch 1 nachgeordneten Ansprüche, andererseits auf die nachfolgende Erläuterung eines Ausführungsbeispiels der Erfindung anhand der Zeichnung zu verweisen. In Verbindung mit der Erläuterung des bevorzugten Ausführungsbeispiels der Erfindung anhand der Zeichnung werden auch im allgemeinen bevorzugte Ausgestaltungen und Weiterbildungen der Lehre erläutert. In der Zeichnung zeigt

Fig. 1
in einer schematischen Darstellung ein Ausführungsbeispiel eines erfindungsgemässen Scherenhubtischs bei ausgefahrener Hubmechanik;
Fig. 2
den Gegenstand aus Fig. 1 bei reduzierter Hubhöhe;
Fig. 3
den Gegenstand aus den Fig. 1 und 2 in der heruntergefahrenen Nullstellung;
Fig. 4
in einer schematischen Draufsicht ein weiteres Ausführungsbeispiel eines erfindungsgemässen Scherenhubtischs;
Fig. 5
den Gegenstand aus Fig. 4 im abgesenkten Zustand und im Schnitt entlang der Linie A-A;
Fig. 6
den Gegenstand aus Fig. 4 im angehobenen Zustand im Schnitt entlang der Linie A-A und
Fig. 7
den Gegenstand aus Fig. 5 im abgesenkten Zustand im Schnitt entlang der Linie Schnitt B-B.
There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to the claims subordinate to claim 1, on the other hand, to refer to the following explanation of an embodiment of the invention with reference to the drawing. In conjunction with the explanation of the preferred embodiment of the invention with reference to the drawing, generally preferred embodiments and developments of the teaching are explained. In the drawing shows
Fig. 1
in a schematic representation of an embodiment of an inventive Scherenhubtischs with extended lifting mechanism;
Fig. 2
the article of Figure 1 at a reduced lifting height.
Fig. 3
the subject matter of Figures 1 and 2 in the shut down zero position.
Fig. 4
in a schematic plan view, another embodiment of an inventive Scherenhubtischs;
Fig. 5
the article of Figure 4 in the lowered state and in section along the line AA.
Fig. 6
the article of FIG. 4 in the raised state in section along the line AA and
Fig. 7
the article of Fig. 5 in the lowered state in section along the line section BB.

Die Fig. 1 bis 3 zeigen gemeinsam einen erfindungsgemässen Scherenhubtisch mit einem unteren Rahmen 1, einem eine Tischebene 2 bildenden oberen Rahmen 3 und einer zwischen dem unteren Rahmen 1 und dem oberen Rahmen 3 wirkenden Scherenmechanik 4, wobei die Scherenmechanik 4 sich kreuzende innere und äussere Scherenglieder 5, 6 umfasst, die zum Anheben oder Absenken des oberen Rahmens 3 bzw. der Tischebene 2 mittels eines in den Figuren nicht gezeigten Antriebs betätigbar sind.FIGS. 1 to 3 together show a scissor lift table according to the invention a lower frame 1, a table level 2 forming an upper frame. 3 and one acting between the lower frame 1 and the upper frame 3 Scherenmechanik 4, wherein the scissor mechanism 4 intersecting inner and outer scissor members 5, 6, which for raising or lowering the upper Frame 3 and the table level 2 by means of a drive not shown in the figures are operable.

Erfindungsgemäss laufen die Scherenglieder 5, 6 mit sämtlichen freien Enden 7 in den Rahmen 1, 3 fest zugeordneten Führungsschienen 8. Die gesamte Scherenmechanik 4 ist mittels einer zwischen der Scherenmechanik 4 und den Rahmen 1, 3 wirkenden Lenkeinrichtung 9 derart positionierbar, dass sie in jeder Winkelstellung der Scherenglieder 5, 6 zumindest weitgehend mittig zu bzw. unter dem oberen Rahmen 3 und somit unter der Tischebene 2 positioniert ist.According to the invention, the scissor members 5, 6 run with all the free ends 7 in FIG the frame 1, 3 permanently associated guide rails 8. The entire scissors mechanism 4 is by means of a between the scissors mechanism 4 and the frame 1, 3rd acting steering device 9 can be positioned so that they are in any angular position the scissor members 5, 6 at least substantially centrally to or below the upper Frame 3 and thus positioned below the table level 2.

Die Fig. 1 und 2 zeigen besonders deutlich, dass die Lenkeinrichtung 2 sich zwischen den Scherengliedern 6 und ortsfesten Anlenkstellen 10, 11 erstreckende Lenkarme 12 umfasst. Diese Lenkarme 12 sind schwenkbar mit der oberen Anlenkstelle 10 und der unteren Anlenkstelle 11 verbunden, so bspw. über feste Gelenkachsen 13. Die Lenkarme 12 sind gleichermassen drehfest mit den äusseren Scherengliedern 6 verbunden, und zwar ebenfalls über feste Gelenkachsen 14.Figs. 1 and 2 show particularly clearly that the steering device 2 is between the scissor members 6 and fixed pivot points 10, 11 extending Steering arms 12 includes. These steering arms 12 are pivotally connected to the upper Anlenkstelle 10 and the lower pivot point 11 connected, so for example. About fixed Joint axes 13. The steering arms 12 are equally rotationally fixed with the outer Scissor members 6 connected, and also about fixed hinge axes 14th

Die Fig. 1 und 2 lassen des weiteren erkennen, dass die obere Anlenkstelle 10 und die untere Anlenkstelle 11 mittig am oberen Rahmen 3 und am unteren Rahmen 1 ausgebildet sind. Des weiteren ist deutlich erkennbar, dass die Lenkarme 12 in etwa mittig zwischen den freien Enden 7 der äusseren Scherenglieder 6 und dem Kreuzungspunkt 15 der Scherenglieder 5, 6 an das jeweilige Scherenglied 6 angelenkt sind.Figs. 1 and 2 can be further seen that the upper pivot point 10 and the lower pivot point 11 centrally on the upper frame 3 and the lower frame. 1 are formed. Furthermore, it can be clearly seen that the steering arms 12 in about centrally between the free ends 7 of the outer scissor members 6 and the crossing point 15 of the scissor members 5, 6 hinged to the respective scissor member 6 are.

Des weiteren lassen die Figuren erkennen, dass an den freien Enden 7 der Scherenglieder 5, 6 Rollen 16 angeordnet sind, die in den Führungsschienen 8 der Rahmen 1, 3 laufen. Die Führungsschienen 8 sind geteilt ausgebildet und erstrecken sich beidseits der Anlenkstellen 10, 11 bishin zum Randbereich der Rahmen 1, 3, wodurch eine Hubbegrenzung realisiert ist.Furthermore, the figures show that at the free ends 7 of the scissor members 5, 6 rollers 16 are arranged in the guide rails 8 of the frame 1, 3 run. The guide rails 8 are formed divided and extend on both sides of the articulation points 10, 11 up to the edge region of the frame 1, 3, whereby a stroke limitation is realized.

Der in den Figuren 4 bis 7 dargestellte Scherenhubtisch besteht im wesentlichen aus einer das zu hebende Gut aufnehmenden Platte 116 und einer an der Unterseite der Platte 116 angeschlossenen scherenartigen Aufstellvorrichtung, die aus ersten Scherenschenkeln 103 und zweiten Scherenschenkeln 106 besteht. Die ersten Scherenschenkel 103 sind am oberen Ende 105 schwenkbar gelagert und am unteren Ende 104 auf einer Führungsschiene 102 über beispielsweise eine Rolle 117 horizontal beweglich. Mit den ersten Scherenschenkeln 103 sind als Führungsbahnen Führungselemente 109 angebracht, die, wie die Fig. 4 und 7 zeigen, innerhalb der zweiten Scherenschenkel 106 angeordnet sind im Gegensatz beispielsweise zum Stand der Technik (DE 34 34 130 A1), wo Führungsbahnen zwischen den innenliegenden und den äusseren Scherenschenkeln angeordnet sind.The scissor lift shown in Figures 4 to 7 consists essentially of a the lifting material to be picked up plate 116 and one at the bottom of the Plate 116 connected scissors-like erector, the first Scissor legs 103 and second scissor legs 106 is. The first Scissor legs 103 are pivotally mounted at the upper end 105 and on lower end 104 on a guide rail 102 via, for example, a roller 117th horizontally movable. With the first scissor legs 103 are as Guideways guide elements 109 attached, which, as Figs. 4 and 7 show, disposed within the second scissor legs 106 are in contrast For example, the prior art (DE 34 34 130 A1), where guideways are arranged between the inner and the outer scissor legs.

Eine obere horizontal angeordnete Führungsschiene 113 dient zur Führung, beispielsweise mit einer Rolle 118, der zweiten Scherenschenkel 106, die am unteren Ende 108 schwenkbar gelagert sind. In den schwenkbaren Scherenschenkeln 106 ist ein Wagen 110 angeordnet, der in Längsrichtung der zweiten Scherenschenkel 106 mit Hilfe eines Antriebs 112 verfahren werden kann. Dies geschieht im dargestellten Beispiel mit Hilfe einer Rolle 119.An upper horizontally disposed guide rail 113 serves to guide, for example with a roller 118, the second scissor leg 106, the lower End 108 are pivotally mounted. In the pivotable scissor legs 106 is a carriage 110 arranged in the longitudinal direction of the second scissor legs 106th can be moved by means of a drive 112. This happens in the illustrated Example with the help of a roller 119.

In den Fig. 4 bis 6 ist als Antrieb 112 ein Elektromotor gewählt, der über eine Spindel 111 mit dem Wagen 110 verbunden ist. Es ist natürlich auch denkbar, einen hydraulischen Antrieb vorzusehen, wobei dann zwischen Antrieb und Wagen 110 eine Kolbenstange (nicht gezeichnet) vorhanden wäre. Dasselbe gilt für einen pneumatischen Antrieb 112, wo ebenfalls mit einer Kolbenstange gearbeitet würde.4 to 6 is selected as the drive 112, an electric motor, which has a spindle 111 is connected to the carriage 110. Of course it is also possible to use a hydraulic Provide drive, in which case between the drive and carriage 110, a piston rod (not drawn) would be present. The same applies to a pneumatic Drive 112, where would also work with a piston rod.

In Fig. 5 ist die Ausgangsposition, d.h. ein abgesenkter Hubtisch101, dargestellt. Die Rolle 119 des Wagens 110 steht am Anfang des Führungselements 109, das in diesem Fall eine besondere keilförmige Ausbildung hat, um mit geringer Kraft aus der Totpunktlage den Hubtisch 101 bewegen zu können, was nur einen relativ schwach dimensionierten Elektromotor (1,5 kw) erfordert. Nach Einschalten des Antriebs 112 wird über die Spindel 111 der Wagen 110 entlang des Führungselements 109 gezogen bis beispielsweise die Stellung erreicht ist, wie sie in Fig. 6 dargestellt ist. Wenn der Motor mit gleichbleibender Drehzahl arbeitet, wird der Hubtisch 101 gleichmässig hochgehoben bzw. - bei geänderter Drehrichtung - abgesenkt.In Fig. 5, the home position, i. a lowered lifting table 101, shown. The Roller 119 of the carriage 110 stands at the beginning of the guide element 109, which is in This case has a special wedge-shaped design, with little force the dead center to be able to move the lifting table 101, which is only a relative weak dimensioned electric motor (1.5 kw) required. After switching on the Drive 112 is moved via the spindle 111 of the carriage 110 along the Guide element 109 pulled until, for example, the position is reached, as in Fig. 6 is shown. If the engine operates at a constant speed, the Lifting table 101 raised evenly or - with changed direction of rotation - lowered.

Das Führungselement 109 kann in seiner Bahn, auf der der Wagen 110 läuft, beliebig gestaltet sein und hängt eigentlich nur davon ab, welche Bewegung der weiteres Beispiel sei genannt, dass die Führungselemente 109 keilförmig in Dreieckform ausgebildet sein können. Sie können aber auch beliebig in ihrem Verlauf linear oder nichtlinear gestaltet sein.The guide member 109 may be in its path on which the carriage 110 is running, be designed arbitrarily and actually depends only on which movement of the Another example may be mentioned that the guide elements 109 wedge-shaped in Triangular shape can be formed. They can also be arbitrary in their course be designed linear or non-linear.

Der Kern der Erfindung besteht also darin, dass eine flache Bauweise für einen Hubtisch 101 erreicht wird, weil durch die besonderen Massnahmen gemäss der Erfindung, Führungselement 109 und zugeordneter Wagen 110, ein schwach dimensionierter (Elektro-)Antrieb gewählt werden kann.The essence of the invention is therefore that a flat design for a lift table 101 is achieved because of the special measures according to the Invention, guide member 109 and associated carriage 110, a weak dimensioned (electric) drive can be selected.

Es ist übrigens nicht erforderlich, dass bei Verwendung mehrerer Hubtische 101 jeder Hubtisch 101 einen Antrieb 112 hat. Vielmehr könnte in einem solchen Fall beispielsweise die Spindel 111 aus dem Hubtisch 101 herausgeführt werden und über ein Kegelradgetriebe mit einem gemeinsamen Antrieb verbunden sein, der alle aufgestellten Hubtische 101 bewegt.By the way, it is not necessary that when using several lifting tables 101 each lift table 101 has a drive 112. Rather, in such a case could For example, the spindle 111 are led out of the lifting table 101 and be connected via a bevel gear with a common drive, all moved lifting tables 101 moves.

Des weiteren sei ganz besonders darauf hingewiesen, dass die Verwendung der als Führungselement 109 dienenden Kurve auch bei einem konventionellen Scherenhubtisch Verwendung finden kann, dessen Scherenglieder einseitig ortsfest angelenkt sind.Furthermore, it should be pointed out that the use of the as Guide element 109 serving curve even in a conventional Scissor lift can be used, the scissor links fixed on one side are articulated.

Abschliessend sei ganz besonders darauf hingewiesen, dass das hier gewählte Ausführungsbeispiel der Erörterung der beanspruchten Lehre dient, diese jedoch nicht auf das Ausführungsbeispiel einschränkt.Finally, it should be particularly noted that the embodiment chosen here The discussion of the claimed teaching is, but not the same limited to the embodiment.

Claims (10)

  1. Scissor-type lifting platform having a lower frame (1), an upper frame (3), which forms a platform plane (2;116), and a scissor mechanism (4), which acts between the lower frame (1) and the upper frame (3), the scissor mechanism (4) comprising intersecting inner and outer scissor elements (5,6;103,106) which can be actuated by means of a drive (112) for lifting or lowering the upper frame (3), the scissor elements (5,6;103,106) running with the free ends (7;104,107) in guide rails (8;102,113) which are securely associated with the frames (1,3), and the drive (112) comprising drive means which are associated with at least one pair of the intersecting scissor elements (5,6;103,106), that is to say, a cam (109), which is associated with the first scissor element (6;103) and which acts as a guide element, a carriage (110), which is associated with the other scissor element (5;106) and which can be displaced on the cam (109) along the scissor element (5;106), and a motor which drives the carriage (110) directly or indirectly,
       characterised in that the scissor mechanism (4) can be positioned by means of a control device (9) which acts between the scissor mechanism (4) and the frames (1,3) in such a manner that it is positioned preferably centrally relative to or under the upper frame (3) in each angular position of the scissor elements (5,6;103,106), and in that the cam (109) can be changed in terms of the position thereof along the scissor element (6;103) and/or in terms of the angular position thereof.
  2. Scissor-type lifting platform according to claim 1, characterised in that the control device (9) comprises at least one control arm (12) which extends between one of the scissor elements (5,6) and a stationary upper articulation point (10) on the upper frame (3).
  3. Scissor-type lifting platform according to claim 1 or 2, characterised in that the control device (9) comprises at least one control arm (12), which extends between one of the scissor elements (5,6) and a fixed lower articulation point (11) on the lower frame (1), the control arms (12) being able to be associated with only one of the scissor elements (5,6), preferably mutually, or with a pair of scissor elements (5,6), preferably the outer scissor elements (6).
  4. Scissor-type lifting platform according to claim 2 or 3, characterised in that the control arm (12) is articulated in a pivotable yet fixed manner to the scissor element (5,6) and to the respective articulation point (10,11) of the frame (1,3), the upper articulation point (10) being able to be formed approximately centrally on the upper frame (3) and the lower articulation point (11) being able to be formed approximately centrally on the lower frame (1).
  5. Scissor-type lifting platform according to any one of claims 2 to 4, characterised in that the control arm (12) is articulated to the respective scissor element (5 or 6) approximately centrally between the free ends (7) of the scissor elements (5,6) and the intersection point (15) of the scissor elements (5,6).
  6. Scissor-type lifting platform according to any one of claims 1 to 5, characterised in that rollers (16), which run in the guide rails (8) of the frames (1,3), are arranged at the free ends (7) of the scissor elements (5,6).
  7. Scissor-type lifting platform according to any one of claims 1 to 6, characterised in that guide rails (8) which extend as far as the edge region of the frames (1,3) are arranged at both sides of the articulation points (10,11), the maximum travel of the scissor mechanism (4) being able to be limited by the extent to which the guide rails (8) extend towards the articulation point (10,11) or centre.
  8. Scissor-type lifting platform according to any one of claims 1 to 7, characterised in that the cam (109) can be changed and/or serves to influence, by means of the predeterminable cam shape thereof, the kinematics and dynamics of the lifting/lowering movement, and/or is arranged in such a manner that the platform rises and/or sinks at a constant speed with a constant speed of the drive (112).
  9. Scissor-type lifting platform according to any one of claims 1 to 8, characterised in that the drive (112) is in the form of an electric motor.
  10. Scissor-type lifting platform according to any one of claims 1 to 9, characterised in that the drive (112) functions pneumatically or hydraulically and the carriage (110) is driven by means of a piston rod and/or is associated with the scissor element (103), which carries the carriage (110), and drives the carriage (110) preferably by means of a spindle (111) and/or is associated with the lower frame and drives the carriage (110) by means of a belt, a chain.
EP99966839A 1998-12-05 1999-12-06 Scissor-type lift table Expired - Lifetime EP1135323B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856206A DE19856206A1 (en) 1998-12-05 1998-12-05 Scissor lift table
DE19856206 1998-12-05
PCT/DE1999/003910 WO2000034174A2 (en) 1998-12-05 1999-12-06 Scissor-type lift table

Publications (2)

Publication Number Publication Date
EP1135323A2 EP1135323A2 (en) 2001-09-26
EP1135323B1 true EP1135323B1 (en) 2003-07-02

Family

ID=7890123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99966839A Expired - Lifetime EP1135323B1 (en) 1998-12-05 1999-12-06 Scissor-type lift table

Country Status (5)

Country Link
EP (1) EP1135323B1 (en)
AT (1) ATE244197T1 (en)
AU (1) AU2276600A (en)
DE (2) DE19856206A1 (en)
WO (1) WO2000034174A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1018274C2 (en) * 2001-06-13 2002-12-16 Baseline V O F Table comprises first and second components, between which extension mechanism is effective. In inwardly folded state table has components in connection with each other and in extended state components are parallel and spaced apart
WO2005044714A1 (en) * 2003-11-07 2005-05-19 Maarten Van Dalsen Load displacer
ITVE20060005A1 (en) * 2006-02-02 2007-08-03 O Me R Spa LIFTING BRIDGE REFINED TO PANTOGRAPH.-
DE102010036409A1 (en) 2010-07-15 2012-01-19 Heinz-Gregor Johnen Mobile personnel lift for use in e.g. field of construction industry, has drive device moving tread relative to undercarriage and comprising drive motor arranged above tread surface in rest position of tread
CN117514627B (en) * 2024-01-05 2024-03-12 山西寰安建设工程有限公司 Mounting seat of wind power generation device and mounting method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE604156C (en) * 1932-02-29 1934-10-15 Henri Louis Joseph Martin Drive device for the crossed scissors of a lifting platform carrying the run-up rails
BE791776A (en) * 1972-02-24 1973-03-16 Trepel Ag LIFT TABLE WITH DEFORMABLE PARALLELOGRAM
US4585212A (en) * 1984-12-07 1986-04-29 International Business Machines Corporation Lift device of the scissor-jack type
DE4430543C2 (en) * 1994-08-27 1998-07-02 Eckhardt Dipl Ing Penzek Lifting device

Also Published As

Publication number Publication date
WO2000034174A3 (en) 2000-08-31
DE59906212D1 (en) 2003-08-07
EP1135323A2 (en) 2001-09-26
DE19856206A1 (en) 2000-06-15
AU2276600A (en) 2000-06-26
ATE244197T1 (en) 2003-07-15
WO2000034174A2 (en) 2000-06-15

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