EP0613852B1 - Scissor type lifting table - Google Patents

Scissor type lifting table Download PDF

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Publication number
EP0613852B1
EP0613852B1 EP94102702A EP94102702A EP0613852B1 EP 0613852 B1 EP0613852 B1 EP 0613852B1 EP 94102702 A EP94102702 A EP 94102702A EP 94102702 A EP94102702 A EP 94102702A EP 0613852 B1 EP0613852 B1 EP 0613852B1
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EP
European Patent Office
Prior art keywords
scissor
piston
lifting
type lifting
table according
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 - Lifetime
Application number
EP94102702A
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German (de)
French (fr)
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EP0613852A1 (en
Inventor
Hermann Janzen
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HYDRAULIK TECHNIEK
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HYDRAULIK TECHNIEK
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00Tables with tops of variable height
    • A47B9/16Tables with tops of variable height with means for, or adapted for, inclining the legs of the table for varying the height of the top, e.g. with adjustable cross legs
    • 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
    • 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
    • B66F7/08Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • the invention relates to a scissor lift table according to the preamble of claim 1.
  • the invention has for its object a scissor lift table of the type mentioned Reduction of the technical effort so that this allows a flat and space-saving design when the scissor arms are in the lowered position and a long stroke of the table platform can be reached via a uniform lifting movement.
  • the scissor-type lifting table according to the invention has, with the lifting rocker, a stroke-introducing member connected to the piston / cylinder unit, which forms an operative connection with a coaxial connection, provided on the one hand directly in the intersection joint, to the respective scissor arms, the articulation of the piston rod end arranged parallel to the axis, and the pressure roller supported on the other hand.
  • a stroke-introducing member connected to the piston / cylinder unit, which forms an operative connection with a coaxial connection, provided on the one hand directly in the intersection joint, to the respective scissor arms, the articulation of the piston rod end arranged parallel to the axis, and the pressure roller supported on the other hand.
  • a corresponding connection of the table platform to the scissor arm ends causes their mutual spreading, whereby after a certain stroke path a system part simultaneously entering a connection engagement on the lifting rocker on at least one scissor arm enables continuous pressure entry from the piston / cylinder unit, the further piston displacement thereof is deflected via a constant lever arm formed on the lifting rocker and the table platform can thus be moved into the end of stroke position with a largely constant internal cylinder pressure.
  • a scissor lift table 1 designated as a whole as 1, designed as a flat lift table, the scissor arms 5, which are arranged along a longitudinal edge and are paired with each other in a cross joint 4,4 ', between a bottom frame 2 and an upper table platform 3, 6 or 7.8.
  • the table platform 3 is provided with an E-shaped, respective outer plate regions 9, 10 and a central region 11 having a plate contour with which, for example, a lifting tool (not shown) can reach under the objects located on the table platform 3 via respective shape recesses 12, 13. It is also conceivable to design the table platform 3 as a continuous plate or with a U-shaped plate contour for other applications, in particular one requiring a flat construction.
  • a side view of the scissor lift table 1 illustrates a connection provided in opposite end regions 14, 15 and 16, 17 of the scissor arms 5, 6, one end of which is fixed via a pivot bearing 18, 19 and the other end via a floating bearing 20, 21 is formed on the underside of the table platform 3 or the top of the lower frame 2 so that the table platform 3 can be brought into different lifting heights H (FIG. 2), H '(FIG. 3) and H' '(FIG. 4).
  • the pairs of scissors arms 5, 6 and 7, 8 are each in the area of the scissor arms 6 and 8 supported by the fixed pivot bearing 19, 19 'with an as Hydraulic cylinder trained piston / cylinder unit 23,24, which extends between respective legs 25,26 and 27,28 of the scissor arms 6 and 8 respectively.
  • the hydraulic cylinders 23, 24 are fixed at one end in the area of their cylinders 33, 34 to a lower cross member 30 (FIG. 1) located between the respective pivot bearings 19, 19 'of the scissor arms 6, 8, and respective support bearings 31, 32, and Piston rods 36, 37 movable via fluid pressure in a central longitudinal plane 35 of the piston / cylinder unit 23, 24 are connected at the other ends in the respective head region 39 via a piston rod linkage 38 with an expansion lever 40 (FIG. 1) or 40 '(not visible).
  • the spreading lever 40 acts as one between the respective inner legs 25 ', 26' or 27 ', 28' of the respective pair of scissor arms 5, 6 or 7,8 located rocker arm 42 is formed which on one end has a connecting part 43 coaxial to the intersection joint 4 or 4 ', on the other end a pressure roller 44 and axially parallel between the intersection joint 4 and the pressure roller axis 45 which, in the lowered position of the table platform 3, advantageously above the central longitudinal plane 35 the piston / cylinder unit 23, 24 has the piston rod linkage 38 (FIG. 2).
  • Stroke position H'd be brought about by the fact that the movement of the piston rods 36, 37 with a superimposed stroke-swivel movement in the area of the lifting arms 42, 42 'raises the cross joints 4,4', so that the lifting arm 42, 42 'is supported the rolling pressure roller 44 on the underside of the table platform 3 executes a pivoting of the lifting arms 42, 42 ′ and the pairs of scissors arms 5, 6 are raised into the spreading position according to FIG. 3 via the bearings 18 and 20 on the table platform 3.
  • the one with the table platform 3 is via the floating bearing 20 connected scissor arm 6 supported on the table platform 3 via a length 50 matched to the above-described swivel path or support area 48 of the lifting rocker 42, so that the lifting forces introduced via the pressure roller 44 on the scissor arms 5.6 and 7.8 both form a vertical spreading force component in the bearing 20 as well as in the bearing 18 and thus a uniform component load is achieved.
  • the piston rod linkage 38 located above the central longitudinal plane 35 of the piston / cylinder unit 23, 24 forms an asymmetrical one in the region of the respective piston rods 36, 37 Force transmission, the effectiveness of which can be increased further in that the respective cylinders 33, 34 in the area of their support bearings 31, 32 have a support 53, which is also asymmetrical with respect to the central longitudinal plane 35, and thus the scissor lift table 1 on the respective lifting arm 42, 42 '.
  • a pressure action plane 52 is shown as a connecting line between the linkage 38 and the support 53.
  • respective force introduction levers are formed with the pressure action plane 52 both between the respective piston rod linkage 38 and the cross joint 4 and between the piston rod linkage 38 and the pressure roller 44, with which the scissor lift table 1 can be designed in a particularly space-saving flat design so that the Spreading or lifting as described above with only one piston / cylinder unit 23,24 can be carried out in the respective scissor arm pairs 5,6 or 7,8.
  • a high mechanical efficiency can thus be achieved with reduced technical complexity and a uniform stroke movement over a large stroke distance, for example up to 1000 mm, can be achieved via a cylinder pressure which is largely constant in all stroke positions H, H ', H''.
  • FIGS. 5 and 6 enlarged detail representations in the area of the lifting rocker 42 illustrate a distance 54 which forms the effective lever length between the piston rod linkage 38 and the cross joint 4 and which extends from the lowered position H (FIG. 2) to the position H '(FIG. 3, Fig. 6) changes and with further increasing spreading of the scissor arms 5, 6 via the abutment of the stop parts 46 in the molded part 47, 47 ', this distance 54 remains effective as a constant lever arm until the table platform 3 reaches the stroke position H' '(FIG. 4, Fig. 5) has reached.
  • the lifting rocker 42 is illustrated in an advantageous illustration of its advantageous design as a cross-stiffened double member 55, with one end of a connecting sleeve 43 'supported in the region of the cross joint 4 between the connecting parts 43 between the pressure plates 56, 57 and the other on the other a support pin 44 'located pressure roller 44 and between these the piston rod linkage 38 are provided.
  • FIG. 9 The installation position of the lifting rocker 42 according to FIG. 9 clarifies in connection with FIG. 8 that the pressure plates 56, 57 located between the respective pair of scissor arms 25 ', 26' each form a part 47,47 'forming groove 58,58' (Fig. 8), into each of which a pin 59,59 'provided as the stop member 46,46' and supported on the inner legs 25 ', 26' of the pairs of scissors arms can be pivoted.
  • the piston / cylinder unit 23, 24 is provided in the area of the respective head region 39 with an inlet recess 60 (FIG. 6), so that in the lowered position according to FIG. Cylinder unit 23, 24 allowing free space is reached and thus the components of the scissor lift table 1 can be lowered to an overall height forming the lifting height H without an overhang and good handling of the scissor lifting table 1 is made possible even in confined spaces.
  • FIG. 10 shows a second embodiment of a scissor lift table 101 which, in the area of the cross joint 4 as the spreading lever 40, has a double lifting arm 142 (FIG. 12) and its scissor arms 5,6 (or 7,8) with simultaneous action are spread by two piston / cylinder pairs 23, 123 and 24, 124 (not visible).
  • FIG. 11 illustrates that the double rocker arm 142 and the scissor lift table 101 can be moved into the illustrated lifting position H 'in that a simultaneous working stroke of the two piston rods 36 of the piston-cylinder pair 23, 123 that are effective in one direction of rotation the double lifting arm 142 is imparted a superimposed lifting and pivoting movement in the region of the cross joint 4, around which the double lifting arm 142 is supported on the one hand the rolling pressure roller 44 on the underside of the table platform 3 and, on the other hand, the pressure roller 144 on the subframe 2 pivots and the bearings 18 and 20 raise the pairs of scissors arms 5, 6 to the spread position according to FIG. 10.
  • the individual representation of the double rocker arm 142 according to FIG. 12 shows its design with the respective effective pressure rollers 44, 144 grouping around the bore for the intersection joint 4, the two piston rod linkages 38, the distances 54, 154 and the shaped grooves 58, via which, in the manner described above Lifting force of the piston / cylinder units 23, 123 can simultaneously be transferred to the scissor arms 5, 6 (FIG. 10).
  • the scissor lift table 101 having the double lifting rocker 142 can thus be provided for lifting larger weights, so that the possible uses of the lifting table are improved overall.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Machine Tool Units (AREA)

Abstract

Between a floor-side underframe 2 and a top table platform 3, a scissor-type lifting table has at least one pair of scissor arms 5, 6; 7, 8 which are connected to one another in a cross joint 4. In opposite end areas 14, 15; 16, 17, the scissor arms 5, 6; 7, 8 are in each case supported at one end in a fixed position at a swivel bearing 18, 19 and at the other end via a loose bearing 20, 21 on the underframe 2 and the table platform 3 respectively. In an initial position close to the underframe 2, an expanding lever 40 located on the outer piston-rod end 39 of a piston/cylinder unit 23, 24 and having a pressure roller 44; 144 reaches in the area of at least one scissor arm 6, 8 under the table platform 3 in order to initiate an initial stroke. The expanding lever 40 is designed as a lifting rocker 42 located between respective inner legs 25', 26'; 27', 28' of at least one of the scissor-arm pairs 5, 6; 7, 8. The lifting rocker 42, at least at one end, has a connecting part 43; 43' coaxial to the cross joint 4 and has at the other end the pressure roller 44 and, axially parallel between the cross joint 4 and the pressure-roller axis 45, a piston-rod articulation 38 located in the initial position above the centre longitudinal plane 35 of the piston/cylinder unit 23; 24. <IMAGE>

Description

Die Erfindung betrifft einen Scherenhubtisch nach dem Oberbegriff des Anspruchs 1.The invention relates to a scissor lift table according to the preamble of claim 1.

Bei einem Scherenhubtisch der vorstehend genannten, aus der DE 39 30 529 A1 bekannten Art ist zumindest einer der als ein Paar zusammenwirkenden und im Bereich eines Kreuzungsgelenks verbundenen Scherenarme mit einem eine erste Kolben/Zylinder-Einheit aufweisenden Spreizhebel versehen, mit dem die in einer Ausgangsstellung nahe einem Unterrahmen befindlichen Scherenarme aus einer Absenkstellung herausgespreizt, bei Erreichen einer Anfangshublage über eine zweite Kolben/Zylinder-Einheit weiter gespreizt und so eine Tischplattform bis in eine Hubendstellung verbracht werden kann. Mit einer derartigen Anordnung von zwei über eine gemeinsame Steuereinheit parallel geschalteten Kolben/Zylinder-Einheiten sind sowohl der technische Aufwand als auch die Gestehungs- und Betriebskosten nachteilig erhöht.In the case of a scissor lifting table of the type mentioned above, known from DE 39 30 529 A1, at least one of the scissor arms which cooperate as a pair and is connected in the region of an intersection joint is provided with a spreading lever which has a first piston / cylinder unit and with which the in an initial position Scissor arms located near a subframe are spread out from a lowered position, spread further via a second piston / cylinder unit when an initial stroke position is reached, and a table platform can thus be brought into a stroke end position. With such an arrangement of two piston / cylinder units connected in parallel via a common control unit, both the technical outlay and the production and operating costs are disadvantageously increased.

Der Erfindung liegt die Aufgabe zugrunde, einen Scherenhubtisch der eingangs genannten Art unter Verringerung des technischen Aufwands so weiterzubilden, daß dieser bei in Absenkstellung befindlichen Scherenarmen eine flache und raumsparende Bauform ermöglicht und über eine gleichmäßige Hubbewegung ein großer Hubweg der Tischplattform erreichbar ist.The invention has for its object a scissor lift table of the type mentioned Reduction of the technical effort so that this allows a flat and space-saving design when the scissor arms are in the lowered position and a long stroke of the table platform can be reached via a uniform lifting movement.

Die Erfindung löst diese Aufgabe durch einen Scherenhubtisch mit den Merkmalen des Anspruchs 1. Hinsichtlich weiterer Ausgestaltungen wird auf die Ansprüche 2 bis 13 verwiesen.The invention solves this problem by a scissor lift table with the features of claim 1. With regard to further refinements, reference is made to claims 2 to 13.

Der erfindungsgemäße Scherenhubtisch weist mit der Hubschwinge ein mit der Kolben/Zylinder-Einheit verbundenes Hubeinleitungsglied auf, das mit einer einerseits unmittelbar im Kreuzungsgelenk vorgesehenen koaxialen Verbindung zu den jeweiligen Scherenarmen, der dazu achsparallel angeordneten Anlenkung des Kolbenstangenendes und der andererseits abgestützten Druckrolle eine Wirkverbindung bildet, die eine vorteilhafte Flachbauweise des Scherenhubtisches ermöglicht, dessen Tischplattform ohne zusätzliche Einzelteile aus der bodennahen Absenkstellung bis in die Hubendstellung durch eine kontinuierliche Ausnutzung des Kolbenhubes nur einer Kolben/Zylinder-Einheit verbringbar ist.The scissor-type lifting table according to the invention has, with the lifting rocker, a stroke-introducing member connected to the piston / cylinder unit, which forms an operative connection with a coaxial connection, provided on the one hand directly in the intersection joint, to the respective scissor arms, the articulation of the piston rod end arranged parallel to the axis, and the pressure roller supported on the other hand. which enables an advantageous flat design of the scissor lift table, the table platform of which can be moved from the lower position close to the ground to the end of stroke position by continuous utilization of the piston stroke by only one piston / cylinder unit without additional individual parts.

Über die Tischplattform als unmittelbarer Teil des Kraftflusses im Scherenhubtisch wird dabei ausgehend von einer parallelen Ausgangsstellung der Scherenarme eine in einer ersten Hubphase wirksame Zugbewegung auf die zu spreizenden Scherenarme über die Druckrolle eingeleitet und dabei ab einem bestimmten Hubwinkel die Hubschwinge gegen weiteres Schwenken so arretiert, daß über die fortgesetzte Hubbewegung der Kolben/Zylinder-Einheit den Scherenarmen über die Hubschwinge ein Drehmoment vermittelt und unter Spreizung der Scherenarme die Tischplattform bis in die Hubendstellung angehoben wird.On the table platform as a direct part of the force flow in the scissor lift table, starting from a parallel starting position of the scissor arms, a pulling movement which is effective in a first lifting phase is initiated on the scissor arms to be spread via the pressure roller and, at a certain lifting angle, the lifting arm is locked against further swiveling in such a way that Torque is imparted to the scissor arms via the lifting arm via the continued stroke movement of the piston / cylinder unit and under Spreading the scissor arms the table platform is raised to the stroke end position.

Mit der Kolbenstangenanlenkung in einem, im wesentlichen von der Bauteilhöhe der in Absenkstellung befindlichen Scherenarme bestimmten Abstand zur Mittellängsebene der Kolben/Zylinder-Einheit ist mit geringem Aufwand eine asymmetrische Anlenkung gebildet, die mit wenigen Gelenkpunkten in der ersten Hubphase eine Druckhebung der Tischplattform ermöglicht. Über eine entsprechende Verbindung der Tischplattform mit den Scherenarmenden wird deren gegenseitige Spreizung bewirkt, wobei daß nach einem bestimmten Hubweg ein gleichzeitig in einen Verbindungseingriff an der Hubschwinge einlaufender Anlageteil an zumindest einem Scherenarm einen kontinuierlichen Druckeintrag aus der Kolben/Zylinder-Einheit ermöglicht, deren weitere Kolbenausschiebung über einen an der Hubschwinge gebildeten, konstanten Hebelarm umgelenkt und so die Tischplattform mit weitgehend konstantem Zylinderinnendruck bis in die Hubendstellung bewegt werden kann.With the piston rod linkage at a distance from the central longitudinal plane of the piston / cylinder unit that is essentially determined by the component height of the scissor arms in the lowered position, an asymmetrical linkage is formed with little effort, which enables the table platform to be raised in pressure in the first stroke phase with a few articulation points. A corresponding connection of the table platform to the scissor arm ends causes their mutual spreading, whereby after a certain stroke path a system part simultaneously entering a connection engagement on the lifting rocker on at least one scissor arm enables continuous pressure entry from the piston / cylinder unit, the further piston displacement thereof is deflected via a constant lever arm formed on the lifting rocker and the table platform can thus be moved into the end of stroke position with a largely constant internal cylinder pressure.

Hinsichtlich wesentlicher weiterer Vorteile und Einzelteile der Erfindung wird auf die nachfolgende Beschreibung und die Zeichnung verwiesen, in der ein Ausführungsbeispiel des Gegenstands der Erfindung schematisch näher veranschaulicht ist. In der Zeichnung zeigen:

Fig. 1
eine Perspektivdarstellung eines erfindungsgemäßen Scherenhubtisches in einer ersten Ausführungsform,
Fig. 2
eine Seitenansicht des Scherenhubtisches ähnlich Fig. 1 mit einer Tischplattform in einer bodennahen Absenkstellung,
Fig. 3
eine Seitenansicht des Scherenhubtisches gemäß Fig. 2 mit der Tischplattform am Ende einer ersten Hubphase,
Fig. 4
eine Seitenansicht des Scherenhubtisches gemäß Fig. 2 oder 3 mit der Tischplattform in einer oberen Endstellung,
Fig. 5
eine Ausschnittsvergrößerung im Bereich eines Kreuzungsgelenks der Scherenarme des Scherenhubtisches gemäß Fig. 4,
Fig. 6
eine vergrößerte Ausschnittsdarstellung ähnlich Fig. 5 mit den Scherenarmen in einer Hubphase gemäß Fig. 3,
Fig. 7 und 8
jeweils eine Einzeldarstellung einer Hubschwinge gemäß der Erfindung in verschiedenen Ansichten,
Fig. 9
eine Seitenansicht im Bereich des Kreuzungsgelenks gemäß Fig. 5,
Fig. 10
eine Seitenansicht des in Hubendstellung befindlichen Scherenhubtisches in einer zweiten Ausführungsform mit einer Doppel-Hubschwinge im Bereich des Kreuzungsgelenkes der Scherenarme,
Fig. 11
eine Seitenansicht des Scherenhubtisches ähnlich Fig. 10 mit der Tischplattform in einer ersten Hubphase, und
Fig. 12
eine Einzeldarstellung der Doppel-Hubschwinge.
With regard to significant further advantages and individual parts of the invention, reference is made to the following description and the drawing, in which an exemplary embodiment of the object of the invention is illustrated schematically in more detail. The drawing shows:
Fig. 1
1 shows a perspective view of a scissor lift table according to the invention in a first embodiment,
Fig. 2
2 shows a side view of the scissor lift table similar to FIG. 1 with a table platform in a lowered position close to the ground,
Fig. 3
2 shows the side view of the scissor lift table according to FIG. 2 with the table platform at the end of a first lifting phase,
Fig. 4
3 shows a side view of the scissor lift table according to FIG. 2 or 3 with the table platform in an upper end position,
Fig. 5
4 shows an enlarged detail in the region of an intersection joint of the scissor arms of the scissor lift table according to FIG. 4,
Fig. 6
5 with the scissor arms in a lifting phase according to FIG. 3,
7 and 8
each an individual representation of a lifting arm according to the invention in different views,
Fig. 9
5 shows a side view in the region of the cross joint according to FIG. 5,
Fig. 10
a side view of the scissor lift table in the end of stroke position in a second embodiment with a double lifting arm in the region of the cross joint of the scissor arms,
Fig. 11
a side view of the scissor lift table similar to FIG. 10 with the table platform in a first lifting phase, and
Fig. 12
a single view of the double lifting arm.

In Fig. 1 ist ein insgesamt mit 1 bezeichneter, als Flachhubtisch ausgebildeter Scherenhubtisch 1 in einer Perspektivdarstellung veranschaulicht, der zwischen einem bodenseitigen Unterrahmen 2 und einer oberen Tischplattform 3 jeweils längsrandseitig angeordnete, in einem Kreuzungsgelenk 4,4' jeweils paarweise miteinander verbundene Scherenarme 5,6 bzw. 7,8 aufweist.1 shows a scissor lift table 1, designated as a whole as 1, designed as a flat lift table, the scissor arms 5, which are arranged along a longitudinal edge and are paired with each other in a cross joint 4,4 ', between a bottom frame 2 and an upper table platform 3, 6 or 7.8.

Die Tischplattform 3 ist dabei mit einer E-förmigen, jeweilige äußere Plattenbereiche 9,10 und einen Mittelbereich 11 aufweisenden Plattenkontur versehen, mit der über jeweilige Formaussparungen 12,13 beispielsweise ein Hubwerkzeug (nicht dargestellt) die auf der Tischplattform 3 befindlichen Gegenstände untergreifen kann. Ebenso ist denkbar, die Tischplattform 3 für andere, insbesondere eine Flachbauweise erfordernde Anwendungsfälle als durchgehende Platte bzw. mit einer U-förmigen Plattenkontur auszubilden.The table platform 3 is provided with an E-shaped, respective outer plate regions 9, 10 and a central region 11 having a plate contour with which, for example, a lifting tool (not shown) can reach under the objects located on the table platform 3 via respective shape recesses 12, 13. It is also conceivable to design the table platform 3 as a continuous plate or with a U-shaped plate contour for other applications, in particular one requiring a flat construction.

In Fig. 4 veranschaulicht eine Seitenansicht des Scherenhubtisches 1 eine in jeweils gegenüberliegenden Endbereichen 14,15 bzw. 16,17 der Scherenarme 5,6 vorgesehene Verbindung, wobei diese einenends ortsfest über jeweils ein Schwenklager 18,19 und anderenends über ein Loslager 20,21 an der Unterseite der Tischplattform 3 bzw. der Oberseite des Unterrahmens 2 so ausgebildet ist, daß die Tischplattform 3 in unterschiedliche Hubhöhen H (Fig. 2), H' (Fig. 3) und H'' (Fig. 4) verbringbar ist.In FIG. 4, a side view of the scissor lift table 1 illustrates a connection provided in opposite end regions 14, 15 and 16, 17 of the scissor arms 5, 6, one end of which is fixed via a pivot bearing 18, 19 and the other end via a floating bearing 20, 21 is formed on the underside of the table platform 3 or the top of the lower frame 2 so that the table platform 3 can be brought into different lifting heights H (FIG. 2), H '(FIG. 3) and H' '(FIG. 4).

Die Scherenarmpaare 5,6 bzw. 7,8 sind dabei jeweils im Bereich des über das ortsfeste Schwenklager 19,19' abgestützten Scherenarmes 6 bzw. 8 mit einer als Hydraulikzylinder ausgebildeten Kolben/Zylinder-Einheit 23,24 versehen, die sich zwischen jeweiligen Schenkeln 25,26 bzw. 27,28 der Scherenarme 6 bzw. 8 erstreckt.The pairs of scissors arms 5, 6 and 7, 8 are each in the area of the scissor arms 6 and 8 supported by the fixed pivot bearing 19, 19 'with an as Hydraulic cylinder trained piston / cylinder unit 23,24, which extends between respective legs 25,26 and 27,28 of the scissor arms 6 and 8 respectively.

Die Hydraulikzylinder 23,24 sind dabei einenends im Bereich ihrer Zylinder 33,34 an einem unteren, zwischen den jeweiligen Schwenklagern 19,19' der Scherenarme 6,8 befindlichen Querträger 30 (Fig. 1) über jeweilige Stützlager 31,32 festgelegt und jeweilige, über Fluiddruck in einer Mittellängsebene 35 der Kolben/Zylinder-Einheit 23,24 bewegliche Kolbenstangen 36,37 sind anderenends im jeweiligen Kopfbereich 39 über eine Kolbenstangenanlenkung 38 mit einem Spreizhebel 40 (Fig. 1) bzw. 40' (nicht sichtbar) verbunden.The hydraulic cylinders 23, 24 are fixed at one end in the area of their cylinders 33, 34 to a lower cross member 30 (FIG. 1) located between the respective pivot bearings 19, 19 'of the scissor arms 6, 8, and respective support bearings 31, 32, and Piston rods 36, 37 movable via fluid pressure in a central longitudinal plane 35 of the piston / cylinder unit 23, 24 are connected at the other ends in the respective head region 39 via a piston rod linkage 38 with an expansion lever 40 (FIG. 1) or 40 '(not visible).

Die vergrößerten Darstellungen gemäß Fig. 5 und Fig. 6 machen im Zusammenhang mit Fig. 9 deutlich, daß der Spreizhebel 40 als eine zwischen den jeweiligen inneren Schenkeln 25',26' bzw. 27',28' des jeweiligen Scherenarmpaares 5,6 bzw. 7,8 befindliche Hubschwinge 42 ausgebildet ist, die einenends einen zum Kreuzungsgelenk 4 bzw. 4' koaxialen Verbindungsteil 43, anderenends eine Druckrolle 44 und achsparallel zwischen dem Kreuzungsgelenk 4 und der Druckrollenachse 45 die in der Absenkstellung der Tischplattform 3 vorteilhaft oberhalb der Mittellängsebene 35 der Kolben/Zylinder-Einheit 23,24 befindliche Kolbenstangenanlenkung 38 aufweist (Fig. 2).The enlarged representations according to FIGS. 5 and 6 make it clear in connection with FIG. 9 that the spreading lever 40 acts as one between the respective inner legs 25 ', 26' or 27 ', 28' of the respective pair of scissor arms 5, 6 or 7,8 located rocker arm 42 is formed which on one end has a connecting part 43 coaxial to the intersection joint 4 or 4 ', on the other end a pressure roller 44 and axially parallel between the intersection joint 4 and the pressure roller axis 45 which, in the lowered position of the table platform 3, advantageously above the central longitudinal plane 35 the piston / cylinder unit 23, 24 has the piston rod linkage 38 (FIG. 2).

Mit einer derartigen Anlenkung der Hubschwinge 42 kann über die, die jeweiligen Zylinder 33,34 der Kolben/Zylinder-Einheit 23,24 im Endbereich nahe dem Schwenklager 19,19' der Scherenarme 6,8 festlegenden Stützlager 31,32 einerseits, die Kolbenstangenanlenkung 38 andererseits und die Druckrolle 44 zur Tischplattform 3 hin eine Wirkverbindung gebildet werden und der in vorteilhafter raumsparender Flachbauweise ausgebildete Scherenhubtisch 1 aus der in Fig. 2 veranschaulichten Absenkstellung in einer ersten Hubphase in die in Fig. 3 dargestellte Hubstellung H'dadurch verbracht werden, daß die Bewegung der Kolbenstangen 36,37 mit einer überlagerten Hub-Schwenk-Bewegung im Bereich der Hubschwingen 42,42' die Kreuzungsgelenke 4,4' anhebt, um dieses gleichzeitig die Hubschwinge 42,42' unter Abstützung der abrollenden Druckrolle 44 an der Unterseite der Tischplattform 3 eine Schwenkung der Hubschwingen 42,42' ausführt und über die Lager 18 und 20 an der Tischplattform 3 die Scherenarmpaare 5,6 in die Spreizstellung gemäß Fig. 3 angehoben werden.With such a linkage of the lifting rocker 42, the respective cylinders 33, 34 of the piston / cylinder unit 23, 24 in the end region near the pivot bearing 19, 19 'of the scissor arms 6, 8 can be fixed Support bearing 31, 32 on the one hand, the piston rod linkage 38 on the other hand, and the pressure roller 44 to the table platform 3 are effectively connected, and the scissor-type lifting table 1, which is designed in an advantageous space-saving flat design, moves from the lowering position illustrated in FIG. 2 in a first lifting phase to that shown in FIG. 3 Stroke position H'd be brought about by the fact that the movement of the piston rods 36, 37 with a superimposed stroke-swivel movement in the area of the lifting arms 42, 42 'raises the cross joints 4,4', so that the lifting arm 42, 42 'is supported the rolling pressure roller 44 on the underside of the table platform 3 executes a pivoting of the lifting arms 42, 42 ′ and the pairs of scissors arms 5, 6 are raised into the spreading position according to FIG. 3 via the bearings 18 and 20 on the table platform 3.

In dieser Bewegungsphase werden gleichzeitig jeweilige, den Schwenkwinkel der Hubschwinge 42 in dieser ersten Hubphase zu den jeweiligen inneren Schenkeln 25',26' begrenzende Anschlagteil 46,46' in den Bereich von Formteilen 47,47' eingeschwenkt, wobei die Druckrolle 44 an der Plattenunterseite der Tischplattform 3 in einem Stützbereich 48 solange einen Abstützungseingriff bildet, bis mit dem Einschwenken des Anschlagteils 46 in das Formteil 47 ein die weitere Krafteinleitung ermöglichender Formschluß gebildet ist. Zur Stabilisierung der Tischplattform 3 kann dabei im Stützbereich 48 eine Stabilisierungsplatte (nicht dargestellt) vorgesehen sein.In this movement phase, respective stop parts 46, 46 'which limit the swivel angle of the lifting rocker 42 in this first lifting phase to the respective inner legs 25', 26 'are swiveled into the region of molded parts 47, 47', the pressure roller 44 on the underside of the plate the table platform 3 forms a support engagement in a support area 48 until the pivoting of the stop part 46 into the molded part 47 forms a positive connection which enables further force introduction. To stabilize the table platform 3, a stabilizing plate (not shown) can be provided in the support area 48.

In dieser in Fig. 2 und 3 dargestellten Hubphase ist der mit der Tischplattform 3 über das Loslager 20 verbundene Scherenarm 6 über einen in seiner Länge 50 auf den vorbeschriebenen Schwenkweg bzw. Stützbereich 48 der Hubschwinge 42 abgestimmten Rollenuntergriff 51 an der Tischplattform 3 abgestützt, so daß die über die Druckrolle 44 eingeleiteten Hubkräfte an den Scherenarmen 5,6 bzw. 7,8 sowohl im Lager 20 als auch im Lager 18 jeweils eine vertikale Spreizkraftkomponente bilden und damit eine gleichmäßige Bauteilbelastung erreicht ist.In this lifting phase shown in FIGS. 2 and 3, the one with the table platform 3 is via the floating bearing 20 connected scissor arm 6 supported on the table platform 3 via a length 50 matched to the above-described swivel path or support area 48 of the lifting rocker 42, so that the lifting forces introduced via the pressure roller 44 on the scissor arms 5.6 and 7.8 both form a vertical spreading force component in the bearing 20 as well as in the bearing 18 and thus a uniform component load is achieved.

Für den vorbeschriebenen Bewegungsablauf, insbesondere für die Bewegung des flach bauenden Scherenhubtisches 1 aus der Absenkstellung gemäß Fig. 2, bildet die oberhalb der Mittellängsebene 35 der Kolben/Zylinder-Einheit 23,24 befindlichen Kolbenstangenanlenkung 38 im Bereich der jeweiligen Kolbenstangen 36,37 eine asymmetrische Krafteinleitung, deren Wirksamkeit noch dadurch erhöht werden kann, daß die jeweiligen Zylinder 33,34 im Bereich ihrer Stützlager 31,32 eine ebenfalls zur Mittellängsebene 35 asymmetrische, nach unten versetzte Abstützung 53 aufweisen und damit der Scherenhubtisch 1 an der jeweiligen Hubschwinge 42,42' in der Absenkstellung eine als Verbindungslinie zwischen der Anlenkung 38 und der Abstützung 53 dargestellte Druckwirkungsebene 52 darbietet.For the movement sequence described above, in particular for the movement of the flat scissor lift table 1 from the lowered position according to FIG. 2, the piston rod linkage 38 located above the central longitudinal plane 35 of the piston / cylinder unit 23, 24 forms an asymmetrical one in the region of the respective piston rods 36, 37 Force transmission, the effectiveness of which can be increased further in that the respective cylinders 33, 34 in the area of their support bearings 31, 32 have a support 53, which is also asymmetrical with respect to the central longitudinal plane 35, and thus the scissor lift table 1 on the respective lifting arm 42, 42 '. in the lowered position, a pressure action plane 52 is shown as a connecting line between the linkage 38 and the support 53.

Im Bereich der Hubschwinge 42 sind mit der Druckwirkungsebene 52 sowohl zwischen der jeweiligen Kolbenstangenanlenkung 38 und dem Kreuzungsgelenk 4 als auch zwischen der Kolbenstangenanlenkung 38 und der Druckrolle 44 jeweilige Krafteinleitungshebel gebildet, mit denen der Scherenhubtisch 1 in besonders raumsparender Flachbauweise so ausgebildet sein kann, daß die vorbeschriebene Spreizung bzw. Hebung mit lediglich einer Kolben/Zylinder-Einheit 23,24 in den jeweiligen Scherenarmpaaren 5,6 bzw. 7,8 durchführbar ist. Damit ist bei vermindertem technischen Aufwand ein hoher mechanischer Wirkungsgrad erzielbar und über einen in allen Hubstellungen H,H',H'' weitgehend konstanten Zylinderdruck eine gleichmäßige Hubbewegung über einen großen Hubweg, z.B. bis 1000 mm, erreichbar.In the area of the lifting rocker 42, respective force introduction levers are formed with the pressure action plane 52 both between the respective piston rod linkage 38 and the cross joint 4 and between the piston rod linkage 38 and the pressure roller 44, with which the scissor lift table 1 can be designed in a particularly space-saving flat design so that the Spreading or lifting as described above with only one piston / cylinder unit 23,24 can be carried out in the respective scissor arm pairs 5,6 or 7,8. A high mechanical efficiency can thus be achieved with reduced technical complexity and a uniform stroke movement over a large stroke distance, for example up to 1000 mm, can be achieved via a cylinder pressure which is largely constant in all stroke positions H, H ', H''.

In Fig. 5 und 6 veranschaulichen vergrößerte Ausschnittsdarstellungen im Bereich der Hubschwinge 42 einen die wirksame Hebellänge zwischen der Kolbenstangenanlenkung 38 und dem Kreuzungsgelenk 4 bildenden Abstand 54, der sich ausgehend von der Absenkstellung H (Fig. 2) bis zur Stellung H' (Fig. 3, Fig. 6) ändert und bei weiter zunehmender Spreizung der Scherenarme 5,6 über die Anlage der Anschlagteile 46 im Formteil 47,47' bleibt dieser Abstand 54 als konstanter Hebelarm wirksam, bis die Tischplattform 3 die Hubstellung H'' (Fig. 4, Fig. 5) erreicht hat.In FIGS. 5 and 6, enlarged detail representations in the area of the lifting rocker 42 illustrate a distance 54 which forms the effective lever length between the piston rod linkage 38 and the cross joint 4 and which extends from the lowered position H (FIG. 2) to the position H '(FIG. 3, Fig. 6) changes and with further increasing spreading of the scissor arms 5, 6 via the abutment of the stop parts 46 in the molded part 47, 47 ', this distance 54 remains effective as a constant lever arm until the table platform 3 reaches the stroke position H' '(FIG. 4, Fig. 5) has reached.

In Fig. 7 und 8 ist die Hubschwinge 42 in einer deren vorteilhafte Ausbildung als ein querversteiftes Doppelglied 55 verdeutlichenden Einzeldarstellung veranschaulicht, wobei zwischen dessen Druckplatten 56,57 einenends eine im Bereich des Kreuzungsgelenks 4 zwischen den Verbindungsteilen 43 abgestützte Verbindungshülse 43', anderenends die auf einem Tragbolzen 44' befindliche Druckrolle 44 und zwischen diesen die Kolbenstangenanlenkung 38 vorgesehen sind.7 and 8, the lifting rocker 42 is illustrated in an advantageous illustration of its advantageous design as a cross-stiffened double member 55, with one end of a connecting sleeve 43 'supported in the region of the cross joint 4 between the connecting parts 43 between the pressure plates 56, 57 and the other on the other a support pin 44 'located pressure roller 44 and between these the piston rod linkage 38 are provided.

Die Einbaulage der Hubschwinge 42 gemäß Fig. 9 verdeutlicht im Zusammenhang mit Fig. 8, daß die zwischen dem jeweiligen Scherenarmpaar 25',26' befindlichen Druckplatten 56,57 jeweils eine den Formteil 47,47' bildende Nut 58,58' (Fig. 8) aufweisen, in die jeweils ein als das Anschlagglied 46,46' vorgesehener und an den inneren Schenkeln 25',26' der Scherenarmpaare abgestützter Stift 59,59' einschwenkbar ist.The installation position of the lifting rocker 42 according to FIG. 9 clarifies in connection with FIG. 8 that the pressure plates 56, 57 located between the respective pair of scissor arms 25 ', 26' each form a part 47,47 'forming groove 58,58' (Fig. 8), into each of which a pin 59,59 'provided as the stop member 46,46' and supported on the inner legs 25 ', 26' of the pairs of scissors arms can be pivoted.

In zweckmäßiger Ausführung ist die Kolben/Zylinder-Einheit 23,24 im Bereich des jeweiligen Kopfbereiches 39 mit einer Einlaufmulde 60 (Fig. 6) versehen, so daß in der Absenkstellung gemäß Fig. 2 für die Druckrolle 44 ein die bodenparallele Ausrichtung der Kolben/Zylinder-Einheit 23,24 ermöglichender Freiraum erreicht ist und damit die Bauteile des Scherenhubtisches 1 auf eine die Hubhöhe H bildende Bauhöhe ohne Überstand absenkbar sind und auch bei beengten Platzverhältnissen eine gute Handhabbarkeit des Scherenhubtisches 1 ermöglicht ist.In an expedient embodiment, the piston / cylinder unit 23, 24 is provided in the area of the respective head region 39 with an inlet recess 60 (FIG. 6), so that in the lowered position according to FIG. Cylinder unit 23, 24 allowing free space is reached and thus the components of the scissor lift table 1 can be lowered to an overall height forming the lifting height H without an overhang and good handling of the scissor lifting table 1 is made possible even in confined spaces.

In Fig. 10 ist eine zweite Ausführungsform eines Scherenhubtisches 101 dargestellt, der im Bereich des Kreuzungsgelenks 4 als den Spreizhebel 40 eine Doppel-Hubschwinge 142 (Fig. 12) aufweist und dessen Scherenarme 5,6 (bzw. 7,8) unter gleichzeitiger Einwirkung von zwei Kolben/Zylinder-Paaren 23,123 bzw. 24,124 (nicht sichtbar) gespreizt werden.FIG. 10 shows a second embodiment of a scissor lift table 101 which, in the area of the cross joint 4 as the spreading lever 40, has a double lifting arm 142 (FIG. 12) and its scissor arms 5,6 (or 7,8) with simultaneous action are spread by two piston / cylinder pairs 23, 123 and 24, 124 (not visible).

Die Hubphase gemäß Fig. 11 verdeutlicht dabei, daß die Doppel-Hubschwinge 142 bzw. der Scherenhubtisch 101 in die dargestellte Hubstellung H' dadurch verbringbar sind, daß über einen gleichzeitigen Arbeitshub der beiden in einer Drehrichtung wirksamen Kolbenstangen 36 des Kolben-Zylinder-Paares 23,123 der Doppel-Hubschwinge 142 eine überlagerte Hub-Schwenk-Bewegung im Bereich des Kreuzungsgelenks 4 vermittelt wird, um dieses die Doppel-Hubschwinge 142 unter gleichzeitiger Abstützung einerseits der abrollenden Druckrolle 44 an der Unterseite der Tischplattform 3 sowie andererseits der Druckrolle 144 am Unterrahmen 2 eine Schwenkung ausführt und über die Lager 18 und 20 die Scherenarmpaare 5,6 bis in die Spreizstellung gemäß Fig. 10 angehoben werden.11 illustrates that the double rocker arm 142 and the scissor lift table 101 can be moved into the illustrated lifting position H 'in that a simultaneous working stroke of the two piston rods 36 of the piston-cylinder pair 23, 123 that are effective in one direction of rotation the double lifting arm 142 is imparted a superimposed lifting and pivoting movement in the region of the cross joint 4, around which the double lifting arm 142 is supported on the one hand the rolling pressure roller 44 on the underside of the table platform 3 and, on the other hand, the pressure roller 144 on the subframe 2 pivots and the bearings 18 and 20 raise the pairs of scissors arms 5, 6 to the spread position according to FIG. 10.

Die Einzeldarstellung der Doppel-Hubschwinge 142 gemäß Fig. 12 zeigt deren Ausbildung mit den jeweils wirkungsgleichen, sich um die Bohrung für das Kreuzungsgelenk 4 gruppierenden Druckrollen 44,144, die beiden Kolbenstangenanlenkungen 38, die Abstände 54,154 und die Formnuten 58, über die in vorbeschriebener Art die Hubkraft der Kolben/Zylinder-Einheiten 23,123 gleichzeitig auf die Scherenarme 5,6 übertragbar ist (Fig. 10).The individual representation of the double rocker arm 142 according to FIG. 12 shows its design with the respective effective pressure rollers 44, 144 grouping around the bore for the intersection joint 4, the two piston rod linkages 38, the distances 54, 154 and the shaped grooves 58, via which, in the manner described above Lifting force of the piston / cylinder units 23, 123 can simultaneously be transferred to the scissor arms 5, 6 (FIG. 10).

In vorteilhafter Ausführung kann damit der die Doppel-Hubschwinge 142 aufweisende Scherenhubtisch 101 für eine Hebung größerer Gewichte vorgesehen werden, so daß die Einsatzmöglichkeiten des Hubtisches insgesamt verbessert sind.In an advantageous embodiment, the scissor lift table 101 having the double lifting rocker 142 can thus be provided for lifting larger weights, so that the possible uses of the lifting table are improved overall.

Claims (13)

  1. A scissor-type lifting table comprising between a bottom frame (2) which is on the floor side and an upper table top (3) at least one pair of scissor arms (5, 6; 7, 8) connected to one another in a universal joint (4) and which, in oppositely disposed end portions (14, 15; 16, 17) are in each case rigidly connected at one end to a pivot bearing (18, 19) and at the other via a loose bearing (20, 21) on the bottom frame (2) or on the table top (3), whereby this starting position which is disposed close to the bottom frame is in the region of at least one scissor arm (6, 8) subject to an expanding lever (40) with a pressure roller (44; 144) engaging underneath it in order to initiate a starting travel of the table top (3), the expanding lever (40) being disposed at the outer end (39) of the piston rod of a piston/cylinder unit (23, 24), characterised in that the expanding lever (40) is constructed as a lifting and swinging arm (42) disposed between respective inner members (25', 26'; 27', 28') of at least one of the pairs of scissor arms (5, 6; 7, 8) and which has at least at one end a connecting part (43, 43') coaxial with the universal joint (4) and which has at the other the pressure roller (44) and axially parallel between the universal joint (4) and the spindle (45) of the pressure roller a piston rod articulation (38) which, in the lowered position, is disposed above the median longitudinal plane (35) of the piston/cylinder unit (23; 24).
  2. A scissor type lifting table according to claim 1, characterised in that via a bracing arrangement (31, 32) which fixes the cylinder (33, 34) of the piston/cylinder unit (23, 24) in the end part close to the pivot bearing (18, 19) of the scissor arm (6, 8), the lifting swinging arm (42) on the one hand, the piston rod articulation (38) on the other and the thrust roller (44) constitutes an operative connection with the table top (3) and in that this latter can be moved into an extreme lifted position by only one piston/cylinder unit (23, 24) which, in every phase of lifting (H; H'; H''), has a substantially constant internal cylinder pressure, only one such unit (23, 24) being provided per pair of scissor arms (5, 6; 7, 8) and engaging under the table top (3).
  3. A scissor type lifting table according to claim 1 or 2, characterised in that the lifting swinging arm (42) has a shaped part (47, 47') which limits the pivot range in a first lifting phase (H') via an abutment member (46, 46') braced in the region of whichever is the inner arm (25', 26').
  4. A scissor type lifting table according to one of claims 1 to 3, characterised in that the table top (3) comprising a supporting area (48) on the under side of the table top has a pressure roller (44) disposed on the lifting swinging arm (42) so engaging under it that a bracing engagement is formed in a first lifting phase (H') bounded by the inward pivoting of the abutment member (46, 46') into the shaped part (47, 47').
  5. A scissor type lifting table according to one of claims 1 to 4, characterised in that the scissor arm (6) connected by a loose bearing (20) to the table top (3) is connected to the table top (3) via an element (51) engaging under the roller and the length (50) of which is attuned to the pivoting part of the lifting swinging arm (42).
  6. A scissor type lifting table according to one of claims 1 to 5, characterised in that the cylinder (33, 34) of the piston/cylinder unit (23, 24) has in the region of the respective pivot bearing (19, 19') a bracing (53, 53') which is spaced apart from the longitudinal central plane (35, 35') thereof.
  7. A scissor type lifting table according to one of claims 1 to 6, characterised in that the lifting swinging arm (42) is constructed as a transversely reinforced double member (55) between the thrust plates (56, 57) of which there is a piston rod articulation (38) which co-operates with the connecting part (43) in the region of the intersecting joint (4) and the pressure roller (44).
  8. A scissor type lifting table according to one of claims 1 to 7, characterised in that the thrust plates (56, 57) disposed between a particular pair of scissor arms (25', 26', 27', 28') have in each case a groove (58) forming the shaped part (47, 47') into which it is possible for a pin (59, 59') to pivot which serves as an abutment member (46, 46') on the inner arms (25', 26') of the pairs (5, 6) of scissor arms.
  9. A scissor type lifting table according to one of claims 1 to 8, characterised in that the thrust plates (56, 57) are provided with a coaxial connecting sleeve (43') in the region of the universal joint (4).
  10. A scissor type lifting table according to one of claims 1 to 9, characterised in that two pairs (5, 6 and 7, 8) of scissor arms are each provided with a piston/cylinder unit (23, 24) and a lifting swinging arm (42, 42').
  11. A scissor type lifting table according to one of claims 1 to 10, characterised in that the table top (3) is in the supporting region (48) for the supporting roller (44) provided with a stabilising plate on the under side.
  12. A scissor type lifting table according to one of claims 1 to 11, characterised in that the piston/cylinder unit (23, 24) is provided with an inlet trough (60) in the region of the piston rod end (39).
  13. A scissor type lifting table according to one of claims 1 to 12, characterised in that the expanding lever (40) is constructed as a double lifting swinging arm (142) with two piston/cylinder units (23; 123) whereby in the starting position there is respectively one (23) above and one (123) below the longitudinal median plane (35) over the piston rod articulating members (38) which are at the same radial distance associated with the universal joint (4).
EP94102702A 1993-03-02 1994-02-23 Scissor type lifting table Expired - Lifetime EP0613852B1 (en)

Applications Claiming Priority (2)

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DE9302967U DE9302967U1 (en) 1993-03-02 1993-03-02 Scissor lift table
DE9302967U 1993-03-02

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EP0613852A1 EP0613852A1 (en) 1994-09-07
EP0613852B1 true EP0613852B1 (en) 1997-11-05

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AT (1) ATE159918T1 (en)
DE (2) DE9302967U1 (en)

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Also Published As

Publication number Publication date
EP0613852A1 (en) 1994-09-07
ATE159918T1 (en) 1997-11-15
DE9302967U1 (en) 1993-04-22
DE59404495D1 (en) 1997-12-11

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